LibC: Rewrite all the headers.

We now have more or less posix issue 2018 conforming libc headers.

This was a really time consuming and boring operation but it had to
be done.

Now we get to actually start implementing libc :)

BAN/include/BAN/Assert.h

@@ -2,10 +2,10 @@
 
 #if defined(__is_kernel)
 	#include <kernel/Panic.h>
-	#define ASSERT(cond) do { if (!(cond)) Kernel::panic("ASSERT("#cond") failed"); } while(false)
+	#define ASSERT(cond) do { if (!(cond)) Kernel::panic("ASSERT("#cond") failed"); } while (false)
 	#define ASSERT_NOT_REACHED() Kernel::panic("ASSERT_NOT_REACHED() failed")
 #else
 	#include <assert.h>
 	#define ASSERT(cond) assert((cond) && "ASSERT("#cond") failed")
-	#define ASSERT_NOT_REACHED() assert(false && "ASSERT_NOT_REACHED() failed")
+	#define ASSERT_NOT_REACHED() do { assert(false && "ASSERT_NOT_REACHED() failed"); __builtin_unreachable(); } while (false)
 #endif

kernel/include/kernel/Syscall.h

@@ -1,20 +1,8 @@
 #pragma once
 
-#define SYS_EXIT 1
-#define SYS_READ 2
-#define SYS_WRITE 3
-#define SYS_TERMID 4
-#define SYS_CLOSE 5
-#define SYS_OPEN 6
-#define SYS_ALLOC 7
-#define SYS_FREE 8
-#define SYS_SEEK 9
-#define SYS_TELL 10
-#define SYS_GET_TERMIOS 11
-#define SYS_SET_TERMIOS 12
-
 #include <kernel/Attributes.h>
 #include <stdint.h>
+#include <sys/syscall.h>
 
 namespace Kernel
 {

libc/CMakeLists.txt

@@ -3,6 +3,7 @@ cmake_minimum_required(VERSION 3.26)
 project(libc CXX ASM)
 
 set(LIBC_SOURCES
+	assert.cpp
 	ctype.cpp
 	fcntl.cpp
 	printf_impl.cpp

libc/assert.cpp

@@ -0,0 +1,9 @@
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+void __assert_fail(const char* expr, const char* file, int line, const char* func)
+{
+	fprintf(stderr, "assert: %s:%d: %s: Assertion '%s' failed.\n", file, line, func, expr);
+	abort();
+}

libc/include/aio.h

@@ -0,0 +1,51 @@
+#ifndef _AIO_H
+#define _AIO_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/aio.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#include <fcntl.h>
+#include <time.h>
+#include <signal.h>
+
+#define __need_off_t
+#define __need_pthread_attr_t
+#define __need_size_t
+#define __need_ssize_t
+#include <sys/types.h>
+
+struct aiocb
+{
+	int				aio_fildes;		/* File descriptor. */
+	off_t			aio_offset;		/* File offset. */
+	volatile void*	aio_buf;		/* Location of buffer. */
+	size_t			aio_nbytes;		/* Length of transfer. */
+	int				aio_reqprio;	/* Request priority offset. */
+	struct sigevent	aio_sigevent;	/* Signal number and value. */
+	int				aio_lio_opcode;	/* Operation to be performed. */
+};
+
+#define AIO_ALLDONE			1
+#define AIO_CANCELLED		2
+#define AIO_NOTCANCELLED	3
+#define LIO_NOP				4
+#define LIO_NOWAIT			5
+#define LIO_READ			6
+#define LIO_WAIT			7
+#define LIO_WRITE			8
+
+int		aio_cancel(int fildes, struct aiocb* aiocbp);
+int		aio_error(const struct aiocb* aiocbp);
+int		aio_fsync(int op, struct aiocb* aiocbp);
+int		aio_read(struct aiocb* aiocbp);
+ssize_t	aio_return(struct aiocb* aiocbp);
+int		aio_suspend(const struct aiocb* const list[], int nent, const struct timespec* timeout);
+int		aio_write(struct aiocb* aiocbp);
+int		lio_listio(int mode, struct aiocb* __restrict const list[__restrict], int nent, struct sigevent* __restrict sig);
+
+__END_DECLS
+
+#endif

libc/include/arpa/inet.h

@@ -0,0 +1,25 @@
+#ifndef _INET_H
+#define _INET_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/arpa_inet.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#include <netinet/in.h>
+#include <inttypes.h>
+
+uint32_t htonl(uint32_t);
+uint16_t htons(uint16_t);
+uint32_t ntohl(uint32_t);
+uint16_t ntohs(uint16_t);
+
+in_addr_t	inet_addr(const char* cp);
+char*		inet_ntoa(struct in_addr in);
+const char*	inet_ntop(int af, const void* __restrict src, char* __restrict dst, socklen_t size);
+int			inet_pton(int af, const char* __restrict src, void* __restrict dst);
+
+__END_DECLS
+
+#endif

libc/include/assert.h

@@ -1,5 +1,20 @@
-#pragma once
+#ifndef __ASSERT_H
+#define _ASSERT_H 1
 
-#include <stdlib.h>
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/assert.h.html
 
-#define assert(expr) { if (!(expr)) abort(); }
+#include <sys/cdefs.h>
+
+#ifdef NDEBUG
+	#define assert(ignore)((void) 0)
+#else
+	#define assert(expr) do { if (!(expr)) __assert_fail(#expr, __FILE__, __LINE__, __func__); } while (0)
+#endif
+
+__BEGIN_DECLS
+
+void __assert_fail(const char*, const char*, int, const char*);
+
+__END_DECLS
+
+#endif

libc/include/bits/printf.h

@@ -1,11 +1,15 @@
-#pragma once
+#ifndef _BITS_PRINTF_H
+#define _BITS_PRINTF_H 1
 
 #include <sys/cdefs.h>
-#include <stdarg.h>
-#include <stddef.h>
 
 __BEGIN_DECLS
 
+#include <stdarg.h>
+#include <stddef.h>
+
 int printf_impl(const char* format, va_list arguments, int (*putc_fun)(int, void*), void* data);
 
 __END_DECLS
+
+#endif

libc/include/bits/pthread_types.h

@@ -0,0 +1,85 @@
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_types.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#if !defined(__pthread_attr_t_defined) && (defined(__need_all_types) || defined(__need_pthread_attr_t))
+	#define __pthread_attr_t_defined 1
+	typedef int pthread_attr_t;
+#endif
+#undef __need_pthread_attr_t
+
+#if !defined(__pthread_barrier_t_defined) && (defined(__need_all_types) || defined(__need_pthread_barrier_t))
+	#define __pthread_barrier_t_defined 1
+	typedef int pthread_barrier_t;
+#endif
+#undef __need_pthread_barrier_t
+
+#if !defined(__pthread_barrierattr_t_defined) && (defined(__need_all_types) || defined(__need_pthread_barrierattr_t))
+	#define __pthread_barrierattr_t_defined 1
+	typedef int pthread_barrierattr_t;
+#endif
+#undef __need_pthread_barrierattr_t
+
+#if !defined(__pthread_cond_t_defined) && (defined(__need_all_types) || defined(__need_pthread_cond_t))
+	#define __pthread_cond_t_defined 1
+	typedef int pthread_cond_t;
+#endif
+#undef __need_pthread_cond_t
+
+#if !defined(__pthread_condattr_t_defined) && (defined(__need_all_types) || defined(__need_pthread_condattr_t))
+	#define __pthread_condattr_t_defined 1
+	typedef int pthread_condattr_t;
+#endif
+#undef __need_pthread_condattr_t
+
+#if !defined(__pthread_key_t_defined) && (defined(__need_all_types) || defined(__need_pthread_key_t))
+	#define __pthread_key_t_defined 1
+	typedef int pthread_key_t;
+#endif
+#undef __need_pthread_key_t
+
+#if !defined(__pthread_mutex_t_defined) && (defined(__need_all_types) || defined(__need_pthread_mutex_t))
+	#define __pthread_mutex_t_defined 1
+	typedef int pthread_mutex_t;
+#endif
+#undef __need_pthread_mutex_t
+
+#if !defined(__pthread_mutexattr_t_defined) && (defined(__need_all_types) || defined(__need_pthread_mutexattr_t))
+	#define __pthread_mutexattr_t_defined 1
+	typedef int pthread_mutexattr_t;
+#endif
+#undef __need_pthread_mutexattr_t
+
+#if !defined(__pthread_once_t_defined) && (defined(__need_all_types) || defined(__need_pthread_once_t))
+	#define __pthread_once_t_defined 1
+	typedef int pthread_once_t;
+#endif
+#undef __need_pthread_once_t
+
+#if !defined(__pthread_rwlock_t_defined) && (defined(__need_all_types) || defined(__need_pthread_rwlock_t))
+	#define __pthread_rwlock_t_defined 1
+	typedef int pthread_rwlock_t;
+#endif
+#undef __need_pthread_rwlock_t
+
+#if !defined(__pthread_rwlockattr_t_defined) && (defined(__need_all_types) || defined(__need_pthread_rwlockattr_t))
+	#define __pthread_rwlockattr_t_defined 1
+	typedef int pthread_rwlockattr_t;
+#endif
+#undef __need_pthread_rwlockattr_t
+
+#if !defined(__pthread_spinlock_t_defined) && (defined(__need_all_types) || defined(__need_pthread_spinlock_t))
+	#define __pthread_spinlock_t_defined 1
+	typedef int pthread_spinlock_t;
+#endif
+#undef __need_pthread_spinlock_t
+
+#if !defined(__pthread_t_defined) && (defined(__need_all_types) || defined(__need_pthread_t))
+	#define __pthread_t_defined 1
+	typedef int pthread_t;
+#endif
+#undef __need_pthread_t
+
+__END_DECLS

libc/include/bits/types/FILE.h

@@ -0,0 +1,18 @@
+#ifndef _BITS_TYPES_FILE_H
+#define _BITS_TYPES_FILE_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/stdio.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#ifndef __FILE_defined
+	#define __FILE_defined 1
+	struct FILE;
+	typedef struct FILE FILE;
+#endif
+
+__END_DECLS
+
+#endif

libc/include/bits/types/locale_t.h

@@ -0,0 +1,17 @@
+#ifndef _BITS_LOCALE_T_H
+#define _BITS_LOCALE_T_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/locale.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#ifndef __locale_t_defined
+	#define __locale_t_defined 1
+	typedef int locale_t;
+#endif
+
+__END_DECLS
+
+#endif

libc/include/bits/types/sa_family_t.h

@@ -0,0 +1,17 @@
+#ifndef _BITS_TYPES_SA_FAMILY_T_H
+#define _BITS_TYPES_SA_FAMILY_T_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_select.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#ifndef __sa_family_t_defined
+	#define __sa_family_t_defined 1
+	typedef unsigned int sa_family_t;
+#endif
+
+__END_DECLS
+
+#endif

libc/include/complex.h

@@ -0,0 +1,83 @@
+#ifndef _COMPLEX_H
+#define _COMPLEX_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/complex.h.html
+
+#include <sys/cdefs.h>
+
+#define complex _Complex
+#define _Complex_I (__extension__ 1.0iF)
+#define I _Complex_I
+
+__BEGIN_DECLS
+
+double				cabs(double complex);
+float				cabsf(float complex);
+long double			cabsl(long double complex);
+double complex		cacos(double complex);
+float complex		cacosf(float complex);
+double complex		cacosh(double complex);
+float complex		cacoshf(float complex);
+long double complex	cacoshl(long double complex);
+long double complex	cacosl(long double complex);
+double				carg(double complex);
+float				cargf(float complex);
+long double			cargl(long double complex);
+double complex		casin(double complex);
+float complex		casinf(float complex);
+double complex		casinh(double complex);
+float complex		casinhf(float complex);
+long double complex	casinhl(long double complex);
+long double complex	casinl(long double complex);
+double complex		catan(double complex);
+float complex		catanf(float complex);
+double complex		catanh(double complex);
+float complex		catanhf(float complex);
+long double complex	catanhl(long double complex);
+long double complex	catanl(long double complex);
+double complex		ccos(double complex);
+float complex		ccosf(float complex);
+double complex		ccosh(double complex);
+float complex		ccoshf(float complex);
+long double complex	ccoshl(long double complex);
+long double complex	ccosl(long double complex);
+double complex		cexp(double complex);
+float complex		cexpf(float complex);
+long double complex	cexpl(long double complex);
+double				cimag(double complex);
+float				cimagf(float complex);
+long double			cimagl(long double complex);
+double complex		clog(double complex);
+float complex		clogf(float complex);
+long double complex	clogl(long double complex);
+double complex		conj(double complex);
+float complex		conjf(float complex);
+long double complex	conjl(long double complex);
+double complex		cpow(double complex, double complex);
+float complex		cpowf(float complex, float complex);
+long double complex	cpowl(long double complex, long double complex);
+double complex		cproj(double complex);
+float complex		cprojf(float complex);
+long double complex	cprojl(long double complex);
+double				creal(double complex);
+float				crealf(float complex);
+long double			creall(long double complex);
+double complex		csin(double complex);
+float complex		csinf(float complex);
+double complex		csinh(double complex);
+float complex		csinhf(float complex);
+long double complex	csinhl(long double complex);
+long double complex	csinl(long double complex);
+double complex		csqrt(double complex);
+float complex		csqrtf(float complex);
+long double complex	csqrtl(long double complex);
+double complex		ctan(double complex);
+float complex		ctanf(float complex);
+double complex		ctanh(double complex);
+float complex		ctanhf(float complex);
+long double complex	ctanhl(long double complex);
+long double complex	ctanl(long double complex);
+
+__END_DECLS
+
+#endif

libc/include/cpio.h

@@ -0,0 +1,35 @@
+#ifndef _CPIO_H
+#define _CPIO_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/cpio.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define C_IRUSR		0000400
+#define C_IWUSR		0000200
+#define C_IXUSR		0000100
+#define C_IRGRP		0000040
+#define C_IWGRP		0000020
+#define C_IXGRP		0000010
+#define C_IROTH		0000004
+#define C_IWOTH		0000002
+#define C_IXOTH		0000001
+#define C_ISUID		0004000
+#define C_ISGID		0002000
+#define C_ISVTX		0001000
+#define C_ISDIR		0040000
+#define C_ISFIFO	0010000
+#define C_ISREG		0100000
+#define C_ISBLK		0060000
+#define C_ISCHR		0020000
+#define C_ISCTG		0110000
+#define C_ISLNK		0120000
+#define C_ISSOCK	0140000
+
+#define MAGIC "070707"
+
+__END_DECLS
+
+#endif

libc/include/ctype.h

@@ -1,24 +1,48 @@
-#pragma once
+#ifndef _CTYPE_H
+#define _CTYPE_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/ctype.h.html
 
 #include <sys/cdefs.h>
 
+#include <bits/types/locale_t.h>
+
 __BEGIN_DECLS
 
 int isalnum(int);
+int isalnum_l(int, locale_t);
 int isalpha(int);
+int isalpha_l(int, locale_t);
 int isascii(int);
 int isblank(int);
+int isblank_l(int, locale_t);
 int iscntrl(int);
+int iscntrl_l(int, locale_t);
 int isdigit(int);
+int isdigit_l(int, locale_t);
 int isgraph(int);
+int isgraph_l(int, locale_t);
 int islower(int);
+int islower_l(int, locale_t);
 int isprint(int);
+int isprint_l(int, locale_t);
 int ispunct(int);
+int ispunct_l(int, locale_t);
 int isspace(int);
+int isspace_l(int, locale_t);
 int isupper(int);
+int isupper_l(int, locale_t);
 int isxdigit(int);
-
+int isxdigit_l(int, locale_t);
-int toupper(int);
+int toascii(int);
 int tolower(int);
+int tolower_l(int, locale_t);
+int toupper(int);
+int toupper_l(int, locale_t);
+
+#define _toupper(val) ::toupper(val)
+#define _tolower(val) ::tolower(val)
 
 __END_DECLS
+
+#endif

libc/include/dirent.h

@@ -1,27 +1,36 @@
-#pragma once
+#ifndef _DIRENT_H
+#define _DIRENT_H 1
 
-#include <sys/types.h>
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/dirent.h.html
+
+#include <sys/cdefs.h>
 
 __BEGIN_DECLS
 
+#define __need_ino_t
+#include <sys/types.h>
+
 struct DIR;
+typedef DIR DIR;
 
 struct dirent
 {
-	ino_t d_ino;
+	ino_t d_ino;	/* File serial number. */
-	char d_name[];
+	char d_name[];	/* Filename string of entry. */
 };
 
-int				alphasort(const struct dirent**, const struct dirent**);
+int				alphasort(const struct dirent** d1, const struct dirent** d2);
-int				closedir(DIR*);
+int				closedir(DIR* dirp);
-int				dirfd(DIR*);
+int				dirfd(DIR* dirp);
-DIR*			fdopendir(int);
+DIR*			fdopendir(int fd);
-DIR*			opendir(const char*);
+DIR*			opendir(const char* dirname);
-struct dirent*	readdir(DIR*);
+struct dirent*	readdir(DIR* dirp);
-int				readdir_r(DIR*, struct dirent*, struct dirent**);
+int				readdir_r(DIR* __restrict dirp, struct dirent* __restrict entry, struct dirent** __restrict result);
-void			rewinddir(DIR*);
+void			rewinddir(DIR* dirp);
-int				scandir(const char*, struct dirent***, int (*)(const struct dirent*), int (*)(const struct dirent**, const struct dirent**));
+int				scandir(const char* dir, struct dirent*** namelist, int (*sel)(const struct dirent*), int (*compar)(const struct dirent**, const struct dirent**));
-void			seekdir(DIR*, long);
+void			seekdir(DIR* dirp, long loc);
-long			telldir(DIR*);
+long			telldir(DIR* dirp);
 
 __END_DECLS
+
+#endif

libc/include/dlfcn.h

@@ -0,0 +1,22 @@
+#ifndef _DLFCN_H
+#define _DLFCN_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/dlfcn.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define RTLD_LAZY	1
+#define RTLD_NOW	2
+#define RTLD_GLOBAL	3
+#define RTLD_LOCAL	4
+
+int		dlclose(void* handle);
+char*	dlerror(void);
+void*	dlopen(const char* file, int mode);
+void*	dlsym(void* __restrict handle, const char* __restrict name);
+
+__END_DECLS
+
+#endif

libc/include/errno.h

@@ -1,7 +1,12 @@
-#pragma once
+#ifndef _ERRNO_H
+#define _ERRNO_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
 
 #include <sys/cdefs.h>
 
+__BEGIN_DECLS
+
 #define E2BIG			1
 #define EACCES			2
 #define EADDRINUSE		3
@@ -83,13 +88,13 @@
 #define ETXTBSY			79
 #define EWOULDBLOCK		80
 #define EXDEV			81
-#define EEXISTS			82
+#define ENOTBLK			82
-#define ENOTBLK			83
+#define EEXISTS			83
 
-#define errno errno
+#define errno __errno
 
-__BEGIN_DECLS
+extern int __errno;
-
-extern int errno;
 
 __END_DECLS
+
+#endif

libc/include/fcntl.h

@@ -1,18 +1,106 @@
-#pragma once
+#ifndef _FCNTL_H
+#define _FCNTL_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/fcntl.h.html
 
 #include <sys/cdefs.h>
 
-#define O_RDONLY	(1 << 0)
-#define O_WRONLY	(1 << 1)
-#define O_RDWR		(O_RDONLY | O_WRONLY)
-#define O_ACCMODE	(O_RDONLY | O_WRONLY)
-#define O_EXCL		(1 << 2)
-#define O_CREAT		(1 << 3)
-#define O_TRUNC		(1 << 4)
-#define O_APPEND	(1 << 5)
-
 __BEGIN_DECLS
 
-int open(const char*, int, ...);
+#include <sys/stat.h>
+#include <unistd.h>
+
+#define __need_mode_t
+#define __need_off_t
+#define __need_pid_t
+#include <sys/types.h>
+
+#define F_DUPFD			1
+#define F_DUPFD_CLOEXEC	2
+#define F_GETFD			3
+#define F_SETFD			4
+#define F_GETFL			5
+#define F_SETFL			6
+#define F_GETLK			7
+#define F_SETLK			8
+#define F_SETLKW		9
+#define F_GETOWN		10
+#define F_SETOWN		11
+
+#define FD_CLOEXEC 1
+
+#define F_RDLCK 1
+#define F_UNLCK 2
+#define F_WRLCK 3
+
+// NOTE: also defined in stdio.h
+#define SEEK_SET 1
+#define SEEK_CUR 2
+#define SEEK_END 3
+
+/* bits 4-11 */
+#define O_CLOEXEC	0x00010
+#define O_CREAT		0x00020
+#define O_DIRECTORY	0x00040
+#define O_EXCL		0x00080
+#define O_NOCTTY	0x00100
+#define O_NOFOLLOW	0x00200
+#define O_TRUNC		0x00400
+#define O_TTY_INIT	0x00800
+
+/* bits 12-16 */
+#define O_APPEND	0x01000
+#define O_DSYNC		0x02000
+#define O_NONBLOCK	0x04000
+#define O_RSYNC		0x08000
+#define O_SYNC		0x10000
+
+#define O_ACCMODE	0x00003
+
+/* bits 0-1 */
+#define O_RDONLY	0x00001
+#define O_WRONLY	0x00002
+#define O_RDWR		(O_RDONLY | O_WRONLY)
+
+/* bit 17 */
+#define AT_FDCWD	0x20000
+
+/* bit 18 */
+#define AT_EACCESS	0x40000
+
+/* bit 19 */
+#define AT_SYMLINK_NOFOLLOW 0x80000
+
+/* bit 20 */
+#define AT_SYMLINK_FOLLOW 0x100000
+
+/* bit 21 */
+#define AT_REMOVEDIR 0x200000
+
+/* bits 22-27 */
+#define POSIX_FADV_DONTNEED		0x0400000
+#define POSIX_FADV_NOREUSE		0x0800000
+#define POSIX_FADV_NORMAL		0x1000000
+#define POSIX_FADV_RANDOM		0x2000000
+#define POSIX_FADV_SEQUENTIAL	0x4000000
+#define POSIX_FADV_WILLNEED		0x8000000
+
+struct flock
+{
+	short l_type;	/* Type of lock; F_RDLCK, F_WRLCK, F_UNLCK. */
+	short l_whence;	/* Flag for starting offset. */
+	off_t l_start;	/* Relative offset in bytes. */
+	off_t l_len;	/* Size; if 0 then until EOF. */
+	pid_t l_pid;	/* Process ID of the process holding the lock; returned with F_GETLK. */
+};
+
+int creat(const char* path, mode_t mode);
+int fcntl(int fildes, int cmd, ...);
+int open(const char* path, int oflag, ...);
+int openat(int fd, const char* path, int oflag, ...);
+int posix_fadvise(int fd, off_t offset, off_t len, int advice);
+int posix_fallocate(int fd, off_t offset, off_t len);
 
 __END_DECLS
+
+#endif

libc/include/fenv.h

@@ -0,0 +1,14 @@
+#ifndef _FENV_H
+#define _FENV_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/fenv.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+// FIXME
+
+__END_DECLS
+
+#endif

libc/include/fmtmsg.h

@@ -0,0 +1,42 @@
+#ifndef _FMTMSG_H
+#define _FMTMSG_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/fmtmsg.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define MM_HARD		1
+#define MM_SOFT		2
+#define MM_FIRM		3
+#define MM_APPL		4
+#define MM_UTIL		5
+#define MM_OPSYS	6
+#define MM_RECOVER	7
+#define MM_NRECOV	8
+#define MM_HALT		9
+#define MM_ERROR	10
+#define MM_WARNING	11
+#define MM_INFO		12
+#define MM_NOSEV	13
+#define MM_PRINT	14
+#define MM_CONSOLE	15
+
+#define MM_NULLLBL	(char*)0
+#define MM_NULLSEV	0
+#define MM_NULLMC	0L
+#define MM_NULLTXT	(char*)0
+#define MM_NULLACL	(char*)0
+#define MM_NULLTAG	(char*)0
+
+#define MM_OK		0
+#define MM_NOTOK	1
+#define MM_NOMSG	2
+#define MM_NOCON	3
+
+int fmtmsg(long classification, const char* label, int severity, const char* text, const char* action, const char* tag);
+
+__END_DECLS
+
+#endif

libc/include/fnmatch.h

@@ -0,0 +1,19 @@
+#ifndef _FNMATCH_H
+#define _FNMATCH_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/fnmatch.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define FNM_NOMATCH		1
+#define FNM_PATHNAME	0x01
+#define FNM_PERIOD		0x02
+#define FNM_NOESCAPE	0x04
+
+int fnmatch(const char* pattern, const char* string, int flags);
+
+__END_DECLS
+
+#endif

libc/include/ftw.h

@@ -0,0 +1,36 @@
+#ifndef _FTW_H
+#define _FTW_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/ftw.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#include <sys/stat.h>
+
+struct FTW
+{
+	int base;
+	int level;
+};
+
+#define FTW_F	1
+#define FTW_D	2
+#define FTW_DNR	3
+#define FTW_DP	4
+#define FTW_NS	5
+#define FTW_SL	6
+#define FTW_SLN	7
+
+#define FTW_PHYS	1
+#define FTW_MOUNT	2
+#define FTW_DEPTH	3
+#define FTW_CHDIR	4
+
+int ftw(const char* path, int (*fn)(const char*, const struct stat* ptr, int flag), int ndirs);
+int nftw(const char* path, int (*fn)(const char*, const struct stat*, int, struct FTW*), int fd_limit, int flags);
+
+__END_DECLS
+
+#endif

libc/include/glob.h

@@ -0,0 +1,37 @@
+#ifndef _GLOB_H
+#define _GLOB_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/glob.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_size_t
+#include <sys/types.h>
+
+#define GLOB_APPEND		0x01
+#define GLOB_DOOFFS		0x02
+#define GLOB_ERR		0x04
+#define GLOB_MARK		0x08
+#define GLOB_NOCHECK	0x10
+#define GLOB_NOESCAPE	0x20
+#define GLOB_NOSORT		0x40
+
+#define GLOB_ABORTED	1
+#define GLOB_NOMATCH	2
+#define GLOB_NOSPACE	3
+
+struct glob_t
+{
+	size_t gl_pathc;	/* Count of paths matched by pattern. */
+	char** gl_pathv;	/* Pointer to a list of matched pathnames. */
+	size_t gl_offs;		/* Slots to reserve at the beginning of gl_pathv. */
+};
+
+int		glob(const char* __restrict pattern, int flags, int (*errfunc)(const char* epath, int eerrno), glob_t* __restrict pglob);
+void	globfree(glob_t* pglob);
+
+__END_DECLS
+
+#endif

libc/include/grp.h

@@ -0,0 +1,31 @@
+#ifndef _GRP_H
+#define _GRP_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/grp.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_gid_t
+#define __need_size_t
+#include <sys/types.h>
+
+struct group
+{
+	char* gr_name;	/* The name of the group. */
+	gid_t gr_gid;	/* Numerical group ID. */
+	char** gr_mem;	/* Pointer to a null-terminated array of character pointers to member names. */
+};
+
+void			endgrent(void);
+struct group*	getgrent(void);
+struct group*	getgrgid(gid_t gid);
+int				getgrgit_r(gid_t gid, struct group* grp, char* buffer, size_t bufsize, struct group** result);
+struct group*	getgrnam(const char* name);
+int				getgrnam_r(const char* name, struct group* grp, char* buffer, size_t bufsize, struct group** result);
+void			setgrent(void);
+
+__END_DECLS
+
+#endif

libc/include/iconv.h

@@ -0,0 +1,21 @@
+#ifndef _ICONV_H
+#define _ICONV_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/iconv.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_size_t
+#include <sys/types.h>
+
+typedef void* iconv_t;
+
+size_t	iconv(iconv_t cd, char** __restrict inbuf, size_t* __restrict inbytesleft, char** __restrict outbuf, size_t* __restrict outbytesleft);
+int		iconv_close(iconv_t cd);
+iconv_t	iconv_open(const char* tocode, const char* fromcode);
+
+__END_DECLS
+
+#endif

libc/include/inttypes.h

@@ -0,0 +1,206 @@
+#ifndef _INTTYPES_H
+#define _INTTYPES_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/inttypes.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#include <stdint.h>
+
+#define __need_wchar_t
+#include <stddef.h>
+
+typedef struct
+{
+	intmax_t quot;
+	intmax_t rem;
+} imaxdiv_t;
+
+#ifdef __x86_64__
+	#define __PRI64_PREFIX	"l"
+	#define __PRIPTR_PREFIX	"l"
+#else
+	#define __PRI64_PREFIX	"ll"
+	#define __PRIPTR_PREFIX
+#endif
+
+#define PRId8		"d"
+#define PRId16		"d"
+#define PRId32		"d"
+#define PRId64		__PRI64_PREFIX "d"
+#define PRIdLEAST8	"d"
+#define PRIdLEAST16	"d"
+#define PRIdLEAST32	"d"
+#define PRIdLEAST64	__PRI64_PREFIX "d"
+#define PRIdFAST8	"d"
+#define PRIdFAST16	__PRIPTR_PREFIX "d"
+#define PRIdFAST32	__PRIPTR_PREFIX "d"
+#define PRIdFAST64	__PRI64_PREFIX "d"
+#define PRIdMAX		__PRI64_PREFIX "d"
+#define PRIdPTR		__PRIPTR_PREFIX "d"
+
+#define PRIi8		"i"
+#define PRIi16		"i"
+#define PRIi32		"i"
+#define PRIi64		__PRI64_PREFIX "i"
+#define PRIiLEAST8	"i"
+#define PRIiLEAST16	"i"
+#define PRIiLEAST32	"i"
+#define PRIiLEAST64	__PRI64_PREFIX "i"
+#define PRIiFAST8	"i"
+#define PRIiFAST16	__PRIPTR_PREFIX "i"
+#define PRIiFAST32	__PRIPTR_PREFIX "i"
+#define PRIiFAST64	__PRI64_PREFIX "i"
+#define PRIiMAX		__PRI64_PREFIX "i"
+#define PRIiPTR		__PRIPTR_PREFIX "i"
+
+#define PRIo8		"o"
+#define PRIo16		"o"
+#define PRIo32		"o"
+#define PRIo64		__PRI64_PREFIX "o"
+#define PRIoLEAST8	"o"
+#define PRIoLEAST16	"o"
+#define PRIoLEAST32	"o"
+#define PRIoLEAST64	__PRI64_PREFIX "o"
+#define PRIoFAST8	"o"
+#define PRIoFAST16	__PRIPTR_PREFIX "o"
+#define PRIoFAST32	__PRIPTR_PREFIX "o"
+#define PRIoFAST64	__PRI64_PREFIX "o"
+#define PRIoMAX		__PRI64_PREFIX "o"
+#define PRIoPTR		__PRIPTR_PREFIX "o"
+
+#define PRIu8		"u"
+#define PRIu16		"u"
+#define PRIu32		"u"
+#define PRIu64		__PRI64_PREFIX "u"
+#define PRIuLEAST8	"u"
+#define PRIuLEAST16	"u"
+#define PRIuLEAST32	"u"
+#define PRIuLEAST64	__PRI64_PREFIX "u"
+#define PRIuFAST8	"u"
+#define PRIuFAST16	__PRIPTR_PREFIX "u"
+#define PRIuFAST32	__PRIPTR_PREFIX "u"
+#define PRIuFAST64	__PRI64_PREFIX "u"
+#define PRIuMAX		__PRI64_PREFIX "u"
+#define PRIuPTR		__PRIPTR_PREFIX "u"
+
+#define PRIx8		"x"
+#define PRIx16		"x"
+#define PRIx32		"x"
+#define PRIx64		__PRI64_PREFIX "x"
+#define PRIxLEAST8	"x"
+#define PRIxLEAST16	"x"
+#define PRIxLEAST32	"x"
+#define PRIxLEAST64	__PRI64_PREFIX "x"
+#define PRIxFAST8	"x"
+#define PRIxFAST16	__PRIPTR_PREFIX "x"
+#define PRIxFAST32	__PRIPTR_PREFIX "x"
+#define PRIxFAST64	__PRI64_PREFIX "x"
+#define PRIxMAX		__PRI64_PREFIX "x"
+#define PRIxPTR		__PRIPTR_PREFIX "x"
+
+#define PRIX8		"X"
+#define PRIX16		"X"
+#define PRIX32		"X"
+#define PRIX64		__PRI64_PREFIX "X"
+#define PRIXLEAST8	"X"
+#define PRIXLEAST16	"X"
+#define PRIXLEAST32	"X"
+#define PRIXLEAST64	__PRI64_PREFIX "X"
+#define PRIXFAST8	"X"
+#define PRIXFAST16	__PRIPTR_PREFIX "X"
+#define PRIXFAST32	__PRIPTR_PREFIX "X"
+#define PRIXFAST64	__PRI64_PREFIX "X"
+#define PRIXMAX		__PRI64_PREFIX "X"
+#define PRIXPTR		__PRIPTR_PREFIX "X"
+
+#define SCNd8		"hhd"
+#define SCNd16		"hd"
+#define SCNd32		"d"
+#define SCNd64		__PRI64_PREFIX "d"
+#define SCNdLEAST8	"hhd"
+#define SCNdLEAST16	"hd"
+#define SCNdLEAST32	"d"
+#define SCNdLEAST64	__PRI64_PREFIX "d"
+#define SCNdFAST8	"hhd"
+#define SCNdFAST16	__PRIPTR_PREFIX "d"
+#define SCNdFAST32	__PRIPTR_PREFIX "d"
+#define SCNdFAST64	__PRI64_PREFIX "d"
+#define SCNdMAX		__PRI64_PREFIX "d"
+#define SCNdPTR		__PRIPTR_PREFIX "d"
+
+#define SCNi8		"hhi"
+#define SCNi16		"hi"
+#define SCNi32		"i"
+#define SCNi64		__PRI64_PREFIX "i"
+#define SCNiLEAST8	"hhi"
+#define SCNiLEAST16	"hi"
+#define SCNiLEAST32	"i"
+#define SCNiLEAST64	__PRI64_PREFIX "i"
+#define SCNiFAST8	"hhi"
+#define SCNiFAST16	__PRIPTR_PREFIX "i"
+#define SCNiFAST32	__PRIPTR_PREFIX "i"
+#define SCNiFAST64	__PRI64_PREFIX "i"
+#define SCNiMAX		__PRI64_PREFIX "i"
+#define SCNiPTR		__PRIPTR_PREFIX "i"
+
+#define SCNo8		"hho"
+#define SCNo16		"ho"
+#define SCNo32		"o"
+#define SCNo64		__PRI64_PREFIX "o"
+#define SCNoLEAST8	"hho"
+#define SCNoLEAST16	"ho"
+#define SCNoLEAST32	"o"
+#define SCNoLEAST64	__PRI64_PREFIX "o"
+#define SCNoFAST8	"hho"
+#define SCNoFAST16	__PRIPTR_PREFIX "o"
+#define SCNoFAST32	__PRIPTR_PREFIX "o"
+#define SCNoFAST64	__PRI64_PREFIX "o"
+#define SCNoMAX		__PRI64_PREFIX "o"
+#define SCNoPTR		__PRIPTR_PREFIX "o"
+
+#define SCNu8		"hhu"
+#define SCNu16		"hu"
+#define SCNu32		"u"
+#define SCNu64		__PRI64_PREFIX "u"
+#define SCNuLEAST8	"hhu"
+#define SCNuLEAST16	"hu"
+#define SCNuLEAST32	"u"
+#define SCNuLEAST64	__PRI64_PREFIX "u"
+#define SCNuFAST8	"hhu"
+#define SCNuFAST16	__PRIPTR_PREFIX "u"
+#define SCNuFAST32	__PRIPTR_PREFIX "u"
+#define SCNuFAST64	__PRI64_PREFIX "u"
+#define SCNuMAX		__PRI64_PREFIX "u"
+#define SCNuPTR		__PRIPTR_PREFIX "u"
+
+#define SCNx8		"hhx"
+#define SCNx16		"hx"
+#define SCNx32		"x"
+#define SCNx64		__PRI64_PREFIX "x"
+#define SCNxLEAST8	"hhx"
+#define SCNxLEAST16	"hx"
+#define SCNxLEAST32	"x"
+#define SCNxLEAST64	__PRI64_PREFIX "x"
+#define SCNxFAST8	"hhx"
+#define SCNxFAST16	__PRIPTR_PREFIX "x"
+#define SCNxFAST32	__PRIPTR_PREFIX "x"
+#define SCNxFAST64	__PRI64_PREFIX "x"
+#define SCNxMAX		__PRI64_PREFIX "x"
+#define SCNxPTR		__PRIPTR_PREFIX "x"
+
+#undef __PRI64_PREFIX
+#undef __PRIPTR_PREFIX
+
+intmax_t	imaxabs(intmax_t);
+imaxdiv_t	imaxdiv(intmax_t, intmax_t);
+intmax_t	strtoimax(const char* __restrict nptr, char** __restrict endptr, int base);
+uintmax_t	strtoumax(const char* __restrict nptr, char** __restrict endptr, int base);
+intmax_t	wcstoimax(const wchar_t* __restrict nptr, wchar_t** __restrict endptr, int base);
+uintmax_t	wcstoumax(const wchar_t* __restrict nptr, wchar_t** __restrict endptr, int base);
+
+__END_DECLS
+
+#endif

libc/include/langinfo.h

@@ -0,0 +1,74 @@
+#ifndef _LANGINFO_H
+#define _LANGINFO_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/langinfo.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#include <bits/types/locale_t.h>
+#include <nl_types.h>
+
+#define CODESET		0
+#define D_T_FMT		1
+#define D_FMT		2
+#define T_FMT		3
+#define T_FMT_AMPM	4
+#define AM_STR		5
+#define PM_STR		6
+#define DAY_1		7
+#define DAY_2		8
+#define DAY_3		9
+#define DAY_4		10
+#define DAY_5		11
+#define DAY_6		12
+#define DAY_7		13
+#define ABDAY_1		14
+#define ABDAY_2		15
+#define ABDAY_3		16
+#define ABDAY_4		17
+#define ABDAY_5		18
+#define ABDAY_6		19
+#define ABDAY_7		20
+#define MON_1		21
+#define MON_2		22
+#define MON_3		23
+#define MON_4		24
+#define MON_5		25
+#define MON_6		26
+#define MON_7		27
+#define MON_8		28
+#define MON_9		29
+#define MON_10		30
+#define MON_11		31
+#define MON_12		32
+#define ABMON_1		33
+#define ABMON_2		34
+#define ABMON_3		35
+#define ABMON_4		36
+#define ABMON_5		37
+#define ABMON_6		38
+#define ABMON_7		39
+#define ABMON_8		40
+#define ABMON_9		41
+#define ABMON_10	42
+#define ABMON_11	43
+#define ABMON_12	44
+#define ERA			45
+#define ERA_D_FMT	46
+#define ERA_D_T_FMT	47
+#define ERA_T_FMT	48
+#define ALT_DIGITS	49
+#define RADIXCHAR	50
+#define THOUSEP		51
+#define YESEXPR		52
+#define NOEXPR		53
+#define CRNCYSTR	54
+
+char* nl_langinfo(nl_item item);
+char* nl_landinfo_l(nl_item item, locale_t locale);
+
+__END_DECLS
+
+#endif

libc/include/libgen.h

@@ -0,0 +1,15 @@
+#ifndef _LIBGEN_H
+#define _LIBGEN_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/ligen.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+char* basename(char* path);
+char* dirname(char* path);
+
+__END_DECLS
+
+#endif

libc/include/limits.h

@@ -0,0 +1,22 @@
+#ifndef _LIMITS_H
+#define _LIMITS_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/limits.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+// FIXME: What do I have to define here?
+//        glibc seems to only define numerical
+//        and posix constants
+
+#if defined __GNUC__ && !defined _GCC_LIMITS_H_
+	#include_next <limits.h>
+#else
+	#error "unsupported compiler"
+#endif
+
+__END_DECLS
+
+#endif

libc/include/locale.h

@@ -1,25 +1,35 @@
-#pragma once
+#ifndef _LOCALE_H
+#define _LOCALE_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/locale.h.html
 
-#include <stddef.h>
 #include <sys/cdefs.h>
 
-// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/locale.h.html#tag_13_24
+#include <bits/types/locale_t.h>
 
-#define LC_ALL		1
+#define __need_NULL
-#define LC_COLLATE	2
+#include <stddef.h>
-#define LC_CTYPE	3
-#define LC_MESSAGES	4
-#define LC_MONETARY	5
-#define LC_NUMERIC	6
-#define LC_TIME		7
 
-#define LC_COLLATE_MASK		0x01
+#define LC_COLLATE	0
-#define LC_CTYPE_MASK		0x02
+#define LC_CTYPE	1
-#define LC_MESSAGES_MASK	0x04
+#define LC_MESSAGES	2
-#define LC_MONETARY_MASK	0x08
+#define LC_MONETARY	3
-#define LC_NUMERIC_MASK		0x10
+#define LC_NUMERIC	4
-#define LC_TIME_MASK		0x20
+#define LC_TIME 	5
-#define LC_ALL_MASK			0x3F
+#define LC_ALL		6
+
+#define LC_COLLATE_MASK 	(1 << LC_COLLATE)
+#define LC_CTYPE_MASK		(1 << LC_CTYPE)
+#define LC_MESSAGES_MASK	(1 << LC_MESSAGES)
+#define LC_MONETARY_MASK	(1 << LC_MONETARY)
+#define LC_NUMERIC_MASK		(1 << LC_NUMERIC)
+#define LC_TIME_MASK		(1 << LC_TIME)
+#define LC_ALL_MASK   LC_COLLATE_MASK	\
+					| LC_CTYPE_MASK		\
+					| LC_MESSAGES_MASK	\
+					| LC_MONETARY_MASK	\
+					| LC_NUMERIC_MASK	\
+					| LC_TIME_MASK
 
 __BEGIN_DECLS
 
@@ -51,13 +61,13 @@ struct lconv
 	char*	thousands_sep;
 };
 
-typedef int locale_t;
+locale_t		duplocale(locale_t locobj);
-
+void			freelocale(locale_t locobj);
-locale_t		duplocale(locale_t);
+struct lconv*	localeconv(void);
-void			freelocale(locale_t);
+locale_t		newlocale(int category_mask, const char* locale, locale_t base);
-struct lconv	localeconv(void);
+char* 			setlocale(int category, const char* locale);
-locale_t		newlocale(int, const char*, locale_t);
+locale_t		uselocale(locale_t newloc);
-char*			setlocale(int, const char*);
-locale_t		uselocale(locale_t);
 
 __END_DECLS
+
+#endif

libc/include/math.h

@@ -1,16 +1,76 @@
-#pragma once
+#ifndef _MATH_H
+#define _MATH_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/math.h.html
 
 #include <sys/cdefs.h>
 
-#define FP_INFINITE		1
-#define FP_NAN			2
-#define FP_NORMAL		3
-#define FP_SUBNORMAL	4
-#define FP_ZERO			5
-
 __BEGIN_DECLS
 
-extern int signgam;
+#ifndef FLT_EVAL_METHOD
+	#define FLT_EVAL_METHOD 0
+#endif
+
+#if FLT_EVAL_METHOD == 0
+	typedef float float_t;
+	typedef double double_t;
+#elif FLT_EVAL_METHOD == 1
+	typedef double float_t;
+	typedef double double_t;
+#elif FLT_EVAL_METHOD == 2
+	typedef long double float_t;
+	typedef long double double_t;
+#endif
+
+// FIXME: define these
+#if 0
+int fpclassify(real-floating x);
+int isfinite(real-floating x);
+int isgreater(real-floating x, real-floating y);
+int isgreaterequal(real-floating x, real-floating y);
+int isinf(real-floating x);
+int isless(real-floating x, real-floating y);
+int islessequal(real-floating x, real-floating y);
+int islessgreater(real-floating x, real-floating y);
+int isnan(real-floating x);
+int isnormal(real-floating x);
+int isunordered(real-floating x, real-floating y);
+int signbit(real-floating x);
+#endif
+
+#define M_E			2.7182818284590452354
+#define M_LOG2E		1.4426950408889634074
+#define M_LOG10E	0.43429448190325182765
+#define M_LN2		0.69314718055994530942
+#define M_LN10		2.30258509299404568402
+#define M_PI		3.14159265358979323846
+#define M_PI_2		1.57079632679489661923
+#define M_PI_4		0.78539816339744830962
+#define M_1_PI		0.31830988618379067154
+#define M_2_PI		0.63661977236758134308
+#define M_2_SQRTPI	1.12837916709551257390
+#define M_SQRT2		1.41421356237309504880
+#define M_SQRT1_2	0.70710678118654752440
+
+#define HUGE_VAL	1e10000
+#define HUGE_VALF	1e10000f
+#define HUGE_VALL	1e10000L
+#define INFINITY	HUGE_VALf
+#define NAN			(0.0f / 0.0f)
+
+#define FP_INFINITE		0
+#define FP_NAN			1
+#define FP_NORMAL		2
+#define FP_SUBNORMAL	3
+#define FP_ZERO			4
+
+#define FP_ILOGB0	-2147483647
+#define FP_ILOGBNAN	+2147483647
+
+#define MATH_ERRNO		1
+#define MATH_ERREXCEPT	2
+
+#define math_errhandling (MATH_ERRNO | MATH_ERREXCEPT)
 
 double		acos(double);
 float		acosf(float);
@@ -190,4 +250,8 @@ double		y0(double);
 double		y1(double);
 double		yn(int, double);
 
+extern int signgam;
+
 __END_DECLS
+
+#endif

libc/include/monetary.h

@@ -0,0 +1,23 @@
+#ifndef _MONETARY_H
+#define _MONETARY_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/monetary.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#include <bits/types/locale_t.h>
+
+#define __need_size_t
+#include <stddef.h>
+
+#define __need_ssize_t
+#include <sys/types.h>
+
+ssize_t strfmon(char* __restrict s, size_t maxsize, const char* __restrict format, ...);
+ssize_t strfmon_l(char* __restrict s, size_t maxsize, locale_t locale, const char* __restrict format, ...);
+
+__END_DECLS
+
+#endif

libc/include/mqueue.h

@@ -0,0 +1,41 @@
+#ifndef _MQUEUE_H
+#define _MQUEUE_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/mqueue.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#include <time.h>
+#include <signal.h>
+
+#define __need_pthread_attr_t
+#define __need_size_t
+#define __need_ssize_t
+#include <sys/types.h>
+
+typedef int mqd_t;
+
+struct mq_attr
+{
+	long mq_flags;    /* Message queue flags. */
+	long mq_maxmsg;   /* Maximum number of messages. */
+	long mq_msgsize;  /* Maximum message size. */
+	long mq_curmsgs;  /* Number of messages currently queued. */
+};
+
+int		mq_close(mqd_t mqdes);
+int		mq_getattr(mqd_t mqdes, struct mq_attr* mqstat);
+int		mq_notify(mqd_t mqdes, const struct sigevent* notification);
+mqd_t	mq_open(const char* name, int oflag, ...);
+ssize_t	mq_receive(mqd_t mqdes, char* msq_ptr, size_t msq_len, unsigned* msg_prio);
+int		mq_send(mqd_t mqdes, const char* msg_ptr, size_t msg_len, unsigned msg_prio);
+int		mq_setattr(mqd_t mqdes, const struct mq_attr* __restrict mqstat, struct mq_attr* __restrict omqstat);
+ssize_t	mq_timedreceive(mqd_t mqdes, char* __restrict msg_ptr, size_t msg_len, unsigned* __restrict msg_prio, const struct timespec* __restrict abstime);
+int		mq_timedsend(mqd_t mqdes, const char* msg_ptr, size_t msg_len, unsigned msg_prio, const struct timespec* abstime);
+int		mq_unlink(const char* name);
+
+__END_DECLS
+
+#endif

libc/include/ndbm.h

@@ -0,0 +1,39 @@
+#ifndef _NDBM_H
+#define _NDBM_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/ndbm.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define DBM_REPLACE 1
+#define DBM_INSERT 0
+
+#define __need_size_t
+#include <stddef.h>
+
+#define __need_mode_t
+#include <sys/types.h>
+
+typedef struct
+{
+	void* dptr;		/* A pointer to the application's data. */
+	size_t dsize;	/* The size of the object pointed to by dptr */
+} datum;
+
+typedef int DBM;
+
+int		dbm_clearerr(DBM* db);
+void	dbm_close(DBM* db);
+int		dbm_delete(DBM* db, datum key);
+int		dbm_error(DBM* db);
+datum	dbm_fetch(DBM* db, datum key);
+datum	dbm_firstkey(DBM* db);
+datum	dbm_nextkey(DBM* db);
+DBM*	dbm_open(const char* file, int open_flags, mode_t file_mode);
+int		dbm_store(DBM* db, datum key, datum content, int store_mode);
+
+__END_DECLS
+
+#endif

libc/include/net/if.h

@@ -0,0 +1,25 @@
+#ifndef _NET_IF_H
+#define _NET_IF_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/net_if.h.html
+
+#include <sys/cdefs.h>
+
+#define IF_NAMESIZE 16
+
+__BEGIN_DECLS
+
+struct if_nameindex
+{
+	unsigned if_index;	/* Numeric index of the interface. */
+	char* if_name;		/* Null-terminated name of the interface. */
+};
+
+void					if_freenameindex(struct if_nameindex* ptr);
+char*					if_indextoname(unsigned ifindex, char* ifname);
+struct if_nameindex*	if_nameindex(void);
+unsigned				if_nametoindex(const char* ifname);
+
+__END_DECLS
+
+#endif

libc/include/netdb.h

@@ -0,0 +1,111 @@
+#ifndef _NETDB_H
+#define _NETDB_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/netdb.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <inttypes.h>
+
+#define IPPORT_RESERVED 1024
+
+#define AI_PASSIVE		0x01
+#define AI_CANONNAME	0x02
+#define AI_NUMERICHOST	0x04
+#define AI_NUMERICSERV	0x08
+#define AI_V4MAPPED		0x10
+#define AI_ALL			0x20
+#define AI_ADDRCONFIG	0x40
+
+#define NI_NOFQDN		0x01
+#define NI_NUMERICHOST	0x02
+#define NI_NAMEREQD		0x04
+#define NI_NUMERICSERV	0x08
+#define NI_NUMERICSCOPE	0x10
+#define NI_DGRAM		0x20
+
+#define EAI_AGAIN		1
+#define EAI_BADFLAGS	2
+#define EAI_FAIL		3
+#define EAI_FAMILY		4
+#define EAI_MEMORY		5
+#define EAI_NONAME		6
+#define EAI_SERVICE		7
+#define EAI_SOCKTYPE	8
+#define EAI_SYSTEM		9
+#define EAI_OVERFLOW	10
+
+struct hostent
+{
+	char*	h_name;			/* Official name of the host. */
+	char**	h_aliases;		/* A pointer to an array of pointers to alternative host names, terminated by a null pointer. */
+	int		h_addrtype;		/* Address type. */
+	int		h_length;		/* The length, in bytes, of the address. */
+	char**	h_addr_list;	/* A pointer to an array of pointers to network addresses (in network byte order) for the host, terminated by a null pointer. */
+};
+
+struct netent
+{
+	char*		n_name;		/* Official, fully-qualified (including the domain) name of the host. */
+	char**		n_aliases;	/* A pointer to an array of pointers to alternative network names, terminated by a null pointer. */
+	int			n_addrtype;	/* The address type of the network. */
+	uint32_t	n_net;		/* The network number, in host byte order. */
+};
+
+struct protoent
+{
+	char*	p_name;		/* Official name of the protocol. */
+	char**	p_aliases;	/* A pointer to an array of pointers to alternative protocol names, terminated by a null pointer. */
+	int		p_proto;	/* The protocol number. */
+};
+
+struct servent
+{
+	char*	s_name;		/* Official name of the service. */
+	char**	s_aliases;	/* A pointer to an array of pointers to alternative service names, terminated by a null pointer. */
+	int		s_port;		/* A value which, when converted to uint16_t, yields the port number in network byte order at which the service resides. */
+	char*	s_proto;	/* The name of the protocol to use when contacting the service. */
+};
+
+struct addrinfo
+{
+	int					ai_flags;		/* Input flags. */
+	int					ai_family;		/* Address family of socket. */
+	int					ai_socktype;	/* Socket type. */
+	int					ai_protocol;	/* Protocol of socket. */
+	socklen_t			ai_addrlen;		/* Length of socket address. */
+	struct sockaddr*	ai_addr;		/* Socket address of socket. */
+	char*				ai_canonname;	/* Canonical name of service location. */
+	struct addrinfo*	ai_next;		/* Pointer to next in list. */
+};
+
+void				endhostent(void);
+void				endnetent(void);
+void				endprotoent(void);
+void				endservent(void);
+void				freeaddrinfo(struct addrinfo* ai);
+const char*			gai_strerror(int ecode);
+int					getaddrinfo(const char* __restrict nodename, const char* __restrict servname, const struct addrinfo* __restrict hints, struct addrinfo** __restrict res);
+struct hostent*		gethostent(void);
+int					getnameinfo(const struct sockaddr* __restrict sa, socklen_t salen, char* __restrict node, socklen_t nodelen, char* __restrict service, socklen_t servicelen, int flags);
+struct netent*		getnetbyaddr(uint32_t net, int type);
+struct netent*		getnetbyname(const char* name);
+struct netent*		getnetent(void);
+struct protoent*	getprotobyname(const char* name);
+struct protoent*	getprotobynumber(int proto);
+struct protoent*	getprotoent(void);
+struct servent*		getservbyname(const char* name, const char* proto);
+struct servent*		getservbyport(int port, const char* proto);
+struct servent*		getservent(void);
+void				sethostent(int stayopen);
+void				setnetent(int stayopen);
+void				setprotoent(int stayopen);
+void				setservent(int stayopen);
+
+__END_DECLS
+
+#endif

libc/include/netinet/in.h

@@ -0,0 +1,92 @@
+#ifndef _NETINET_IN_H
+#define _NETINET_IN_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/netinet_in.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#include <inttypes.h>
+#include <sys/socket.h>
+
+#define IPPROTO_IP		1
+#define IPPROTO_IPV6	2
+#define IPPROTO_ICMP	3
+#define IPPROTO_RAW		4
+#define IPPROTO_TCP		5
+#define IPPROTO_UDP		6
+
+#define IPV6_JOIN_GROUP		1
+#define IPV6_LEAVE_GROUP	2
+#define IPV6_MULTICAST_HOPS	3
+#define IPV6_MULTICAST_IF	4
+#define IPV6_MULTICAST_LOOP	5
+#define IPV6_UNICAST_HOPS	6
+#define IPV6_V6ONLY			7
+
+#define INADDR_ANY			0
+#define INADDR_BROADCAST	UINT32_MAX
+
+#define INET_ADDRSTRLEN		16
+#define INET6_ADDRSTRLEN	46
+
+#define IN6ADDR_ANY_INIT		{ { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } }
+#define IN6ADDR_LOOPBACK_INIT	{ { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }
+
+#if 0
+#define IN6_IS_ADDR_UNSPECIFIED(addr)
+#define IN6_IS_ADDR_LOOPBACK(addr)
+#define IN6_IS_ADDR_MULTICAST(addr)
+#define IN6_IS_ADDR_LINKLOCAL(addr)
+#define IN6_IS_ADDR_SITELOCAL(addr)
+#define IN6_IS_ADDR_V4MAPPED(addr)
+#define IN6_IS_ADDR_V4COMPAT(addr)
+#define IN6_IS_ADDR_MC_NODELOCAL(addr)
+#define IN6_IS_ADDR_MC_LINKLOCAL(addr)
+#define IN6_IS_ADDR_MC_SITELOCAL(addr)
+#define IN6_IS_ADDR_MC_ORGLOCAL(addr)
+#define IN6_IS_ADDR_MC_GLOBAL(addr)
+#endif
+
+typedef uint16_t in_port_t;
+typedef uint32_t in_addr_t;
+
+struct in_addr
+{
+	in_addr_t s_addr;
+};
+
+struct sockaddr_in
+{
+	sa_family_t		sin_family;	/* AF_INET. */
+	in_port_t		sin_port;	/* Port number. */
+	struct in_addr	sin_addr;	/* IP address. */
+};
+
+struct in6_addr
+{
+	uint8_t s6_addr[16];
+};
+
+struct sockaddr_in6
+{
+	sa_family_t		sin6_family;	/* AF_INET6. */
+	in_port_t		sin6_port;		/* Port number. */
+	uint32_t		sin6_flowinfo;	/* IPv6 traffic class and flow information. */
+	struct in6_addr	sin6_addr;		/* IPv6 address. */
+	uint32_t		sin6_scope_id;	/* Set of interfaces for a scope. */
+};
+
+extern const struct in6_addr in6addr_any;
+extern const struct in6_addr in6addr_loopback;
+
+struct ipv6_mreq
+{
+	struct in6_addr	ipv6mr_multiaddr;	/* IPv6 multicast address. */
+	unsigned		ipv6mr_interface;	/* Interface index. */
+};
+
+__END_DECLS
+
+#endif

libc/include/netinet/tcp.h

@@ -0,0 +1,14 @@
+#ifndef __NETINET_TCP_H
+#define __NETINET_TCP_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/netinet_tcp.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define TCP_NODELAY 1
+
+__END_DECLS
+
+#endif

libc/include/nl_types.h

@@ -0,0 +1,22 @@
+#ifndef _NL_TYPES_H
+#define _NL_TYPES_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/nl_types.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+typedef void* nl_catd;
+typedef int nl_item;
+
+#define NL_SETD			1
+#define NL_CAT_LOCALE	1
+
+int		charclose(nl_catd catd);
+char*	catgets(nl_catd catd, int set_id, int msg_id, const char* s);
+nl_catd	catopen(const char* name, int oflag);
+
+__END_DECLS
+
+#endif

libc/include/poll.h

@@ -0,0 +1,34 @@
+#ifndef _POLL_H
+#define _POLL_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/poll.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+struct pollfd
+{
+	int		fd;			/* The following descriptor being polled. */
+	short	events;		/* The input event flags. */
+	short	revents;	/* The output event flags. */
+};
+
+typedef unsigned long nfds_t;
+
+#define POLLIN		0x001
+#define POLLRDNORM	0x002
+#define POLLRDBAND	0x004
+#define POLLPRI		0x008
+#define POLLOUT		0x010
+#define POLLWRNORM	0x020
+#define POLLWRBAND	0x040
+#define POLLERR		0x080
+#define POLLHUP		0x100
+#define POLLNVAL	0x200
+
+int poll(struct pollfd fds[], nfds_t nfds, int timeout);
+
+__END_DECLS
+
+#endif

libc/include/pthread.h

@@ -0,0 +1,165 @@
+#ifndef _PTHREAD_H
+#define _PTHREAD_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/pthread.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#include <sched.h>
+#include <time.h>
+
+#define __need_size_t
+#define __need_clockid_t
+#define __need_pthread_attr_t
+#define __need_pthread_barrier_t
+#define __need_pthread_barrierattr_t
+#define __need_pthread_cond_t
+#define __need_pthread_condattr_t
+#define __need_pthread_key_t
+#define __need_pthread_mutex_t
+#define __need_pthread_mutexattr_t
+#define __need_pthread_once_t
+#define __need_pthread_rwlock_t
+#define __need_pthread_rwlockattr_t
+#define __need_pthread_spinlock_t
+#define __need_pthread_t
+#include <sys/types.h>
+
+#define PTHREAD_BARRIER_SERIAL_THREAD	1
+#define PTHREAD_CANCEL_ASYNCHRONOUS		2
+#define PTHREAD_CANCEL_ENABLE			3
+#define PTHREAD_CANCEL_DEFERRED			4
+#define PTHREAD_CANCEL_DISABLE			5
+#define PTHREAD_CANCELED				6
+#define PTHREAD_CREATE_DETACHED			7
+#define PTHREAD_CREATE_JOINABLE			8
+#define PTHREAD_EXPLICIT_SCHED			9
+#define PTHREAD_INHERIT_SCHED			10
+#define PTHREAD_MUTEX_DEFAULT			11
+#define PTHREAD_MUTEX_ERRORCHECK		12
+#define PTHREAD_MUTEX_NORMAL			13
+#define PTHREAD_MUTEX_RECURSIVE			14
+#define PTHREAD_MUTEX_ROBUST			15
+#define PTHREAD_MUTEX_STALLED			16
+#define PTHREAD_ONCE_INIT				17
+#define PTHREAD_PRIO_INHERIT			18
+#define PTHREAD_PRIO_NONE				19
+#define PTHREAD_PRIO_PROTECT			20
+#define PTHREAD_PROCESS_SHARED			21
+#define PTHREAD_PROCESS_PRIVATE			22
+#define PTHREAD_SCOPE_PROCESS			23
+#define PTHREAD_SCOPE_SYSTEM			24
+
+#if 0
+#define PTHREAD_COND_INITIALIZER
+#define PTHREAD_MUTEX_INITIALIZER
+#define PTHREAD_RWLOCK_INITIALIZER
+#endif
+
+int			pthread_atfork(void (*prepare)(void), void (*parent)(void), void(*child)(void));
+int			pthread_attr_destroy(pthread_attr_t* attr);
+int			pthread_attr_getdetachstate(const pthread_attr_t* attr, int* detachstate);
+int			pthread_attr_getguardsize(const pthread_attr_t* __restrict attr, size_t* __restrict guardsize);
+int			pthread_attr_getinheritsched(const pthread_attr_t* __restrict attr, int* __restrict inheritsched);
+int			pthread_attr_getschedparam(const pthread_attr_t* __restrict attr, struct sched_param* __restrict param);
+int			pthread_attr_getschedpolicy(const pthread_attr_t* __restrict attr, int* __restrict policy);
+int			pthread_attr_getscope(const pthread_attr_t* __restrict attr, int* __restrict contentionscope);
+int			pthread_attr_getstack(const pthread_attr_t* __restrict attr, void** __restrict stackaddr, size_t* __restrict stacksize);
+int			pthread_attr_getstacksize(const pthread_attr_t* __restrict attr, size_t* __restrict stacksize);
+int			pthread_attr_init(pthread_attr_t* attr);
+int			pthread_attr_setdetachstate(pthread_attr_t* attr, int detachstate);
+int			pthread_attr_setguardsize(pthread_attr_t* attr, size_t guardsize);
+int			pthread_attr_setinheritsched(pthread_attr_t* attr, int inheritsched);
+int			pthread_attr_setschedparam(pthread_attr_t* __restrict attr, const struct sched_param* __restrict param);
+int			pthread_attr_setschedpolicy(pthread_attr_t* attr, int policy);
+int			pthread_attr_setscope(pthread_attr_t* attr, int contentionscope);
+int			pthread_attr_setstack(pthread_attr_t* attr, void* stackaddr, size_t stacksize);
+int			pthread_attr_setstacksize(pthread_attr_t* attr, size_t stacksize);
+int			pthread_barrier_destroy(pthread_barrier_t* barrier);
+int			pthread_barrier_init(pthread_barrier_t* __restrict barrier, const pthread_barrierattr_t* __restrict attr, unsigned count);
+int			pthread_barrier_wait(pthread_barrier_t* barrier);
+int			pthread_barrierattr_destroy(pthread_barrierattr_t* attr);
+int			pthread_barrierattr_getpshared( const pthread_barrierattr_t* __restrict attr, int* __restrict pshared);
+int			pthread_barrierattr_init(pthread_barrierattr_t* attr);
+int			pthread_barrierattr_setpshared(pthread_barrierattr_t* attr, int pshared);
+int			pthread_cancel(pthread_t thread);
+int			pthread_cond_broadcast(pthread_cond_t* cond);
+int			pthread_cond_destroy(pthread_cond_t* cond);
+int			pthread_cond_init(pthread_cond_t* __restrict cond, const pthread_condattr_t* __restrict attr);
+int			pthread_cond_signal(pthread_cond_t* cond);
+int			pthread_cond_timedwait(pthread_cond_t* __restrict cond, pthread_mutex_t* __restrict mutex, const struct timespec* __restrict abstime);
+int			pthread_cond_wait(pthread_cond_t* __restrict cond, pthread_mutex_t* __restrict mutex);
+int			pthread_condattr_destroy(pthread_condattr_t* attr);
+int			pthread_condattr_getclock(const pthread_condattr_t* __restrict attr, clockid_t* __restrict clock_id);
+int			pthread_condattr_getpshared(const pthread_condattr_t* __restrict attr, int* __restrict pshared);
+int			pthread_condattr_init(pthread_condattr_t* attr);
+int			pthread_condattr_setclock(pthread_condattr_t* attr, clockid_t clock_id);
+int			pthread_condattr_setpshared(pthread_condattr_t* attr, int pshared);
+int			pthread_create(pthread_t* __restrict thread, const pthread_attr_t* __restrict attr, void *(*start_routine)(void*), void* __restrict arg);
+int			pthread_detach(pthread_t thread);
+int			pthread_equal(pthread_t t1, pthread_t t2);
+void		pthread_exit(void* value_ptr);
+int			pthread_getconcurrency(void);
+int			pthread_getcpuclockid(pthread_t thread_id, clockid_t* clock_id);
+int			pthread_getschedparam(pthread_t thread, int* __restrict policy, struct sched_param* __restrict param);
+void*		pthread_getspecific(pthread_key_t key);
+int			pthread_join(pthread_t thread, void** value_ptr);
+int			pthread_key_create(pthread_key_t* key, void (*destructor)(void*));
+int			pthread_key_delete(pthread_key_t key);
+int			pthread_mutex_consistent(pthread_mutex_t* mutex);
+int			pthread_mutex_destroy(pthread_mutex_t* mutex);
+int			pthread_mutex_getprioceiling(const pthread_mutex_t* __restrict mutex, int* __restrict prioceiling);
+int			pthread_mutex_init(pthread_mutex_t* __restrict mutex, const pthread_mutexattr_t* __restrict attr);
+int			pthread_mutex_lock(pthread_mutex_t* mutex);
+int			pthread_mutex_setprioceiling(pthread_mutex_t* __restrict mutex, int prioceiling, int* __restrict old_ceiling);
+int			pthread_mutex_timedlock(pthread_mutex_t* __restrict mutex, const struct timespec* __restrict abstime);
+int			pthread_mutex_trylock(pthread_mutex_t* mutex);
+int			pthread_mutex_unlock(pthread_mutex_t* mutex);
+int			pthread_mutexattr_destroy(pthread_mutexattr_t* attr);
+int			pthread_mutexattr_getprioceiling(const pthread_mutexattr_t* __restrict attr, int* __restrict prioceiling);
+int			pthread_mutexattr_getprotocol(const pthread_mutexattr_t* __restrict attr, int* __restrict protocol);
+int			pthread_mutexattr_getpshared(const pthread_mutexattr_t* __restrict attr, int* __restrict pshared);
+int			pthread_mutexattr_getrobust(const pthread_mutexattr_t* __restrict attr, int* __restrict robust);
+int			pthread_mutexattr_gettype(const pthread_mutexattr_t* __restrict attr, int* __restrict type);
+int			pthread_mutexattr_init(pthread_mutexattr_t* attr);
+int			pthread_mutexattr_setprioceiling(pthread_mutexattr_t* attr, int prioceiling);
+int			pthread_mutexattr_setprotocol(pthread_mutexattr_t* attr, int protocol);
+int			pthread_mutexattr_setpshared(pthread_mutexattr_t* attr, int pshared);
+int			pthread_mutexattr_setrobust(pthread_mutexattr_t* attr, int robust);
+int			pthread_mutexattr_settype(pthread_mutexattr_t* attr, int type);
+int			pthread_once(pthread_once_t* once_control, void (*init_routine)(void));
+int			pthread_rwlock_destroy(pthread_rwlock_t* rwlock);
+int			pthread_rwlock_init(pthread_rwlock_t* __restrict rwlock, const pthread_rwlockattr_t* __restrict attr);
+int			pthread_rwlock_rdlock(pthread_rwlock_t* rwlock);
+int			pthread_rwlock_timedrdlock(pthread_rwlock_t* __restrict rwlock, const struct timespec* __restrict abstime);
+int			pthread_rwlock_timedwrlock(pthread_rwlock_t* __restrict rwlock, const struct timespec* __restrict abstime);
+int			pthread_rwlock_tryrdlock(pthread_rwlock_t* rwlock);
+int			pthread_rwlock_trywrlock(pthread_rwlock_t* rwlock);
+int			pthread_rwlock_unlock(pthread_rwlock_t* rwlock);
+int			pthread_rwlock_wrlock(pthread_rwlock_t* rwlock);
+int			pthread_rwlockattr_destroy(pthread_rwlockattr_t* attr);
+int			pthread_rwlockattr_getpshared(const pthread_rwlockattr_t* __restrict attr, int* __restrict pshared);
+int			pthread_rwlockattr_init(pthread_rwlockattr_t* attr);
+int			pthread_rwlockattr_setpshared(pthread_rwlockattr_t* attr, int pshared);
+pthread_t	pthread_self(void);
+int			pthread_setcancelstate(int state, int* oldstate);
+int			pthread_setcanceltype(int type, int* oldtype);
+int			pthread_setconcurrency(int new_level);
+int			pthread_setschedparam(pthread_t thread, int policy, const struct sched_param* param);
+int			pthread_setschedprio(pthread_t thread, int prio);
+int			pthread_setspecific(pthread_key_t key, const void* value);
+int			pthread_spin_destroy(pthread_spinlock_t* lock);
+int			pthread_spin_init(pthread_spinlock_t* lock, int pshared);
+int			pthread_spin_lock(pthread_spinlock_t* lock);
+int			pthread_spin_trylock(pthread_spinlock_t* lock);
+int			pthread_spin_unlock(pthread_spinlock_t* lock);
+void		pthread_testcancel(void);
+
+void		pthread_cleanup_pop(int execute);
+void		pthread_cleanup_push(void (*routine)(void*), void* arg);
+
+__END_DECLS
+
+#endif

libc/include/pwd.h

@@ -0,0 +1,34 @@
+#ifndef _PWD_H
+#define _PWD_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/pwd.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_gid_t
+#define __need_uid_t
+#define __need_size_t
+#include <sys/types.h>
+
+struct passwd
+{
+	char*	pw_name;	/* User's login name. */
+	uid_t	pw_uid;		/* Numerical user ID. */
+	gid_t	pw_gid;		/* Numerical group ID. */
+	char*	pw_dir;		/* Initial working directory. */
+	char*	pw_shell;	/* Program to use as shell. */
+};
+
+void			endpwent(void);
+struct passwd*	getpwent(void);
+struct passwd*	getpwnam(const char* name);
+int				getpwnam_r(const char* name, struct passwd* pwd, char* buffer, size_t bufsize, struct passwd** result);
+struct passwd*	getpwuid(uid_t uid);
+int				getpwuid_r(uid_t uid, struct passwd* pwd, char* buffer, size_t bufsize, struct passwd** result);
+void			setpwent(void);
+
+__END_DECLS
+
+#endif

libc/include/regex.h

@@ -0,0 +1,54 @@
+#ifndef _REGEX_H
+#define _REGEX_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/regex.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_size_t
+#include <sys/types.h>
+
+typedef struct
+{
+	size_t re_nsub;
+} regex_t;
+
+typedef __PTRDIFF_TYPE__ regoff_t;
+
+typedef struct
+{
+	regoff_t rm_so;	/* Byte offset from start of string to start of substring. */
+	regoff_t rm_eo;	/* Byte offset from start of string of the first character after the end of substring. */
+} regmatch_t;
+
+#define REG_EXTENDED	0x01
+#define REG_ICASE		0x02
+#define REG_NOSUB		0x04
+#define REG_NEWLINE		0x80
+
+#define REG_NOTBOL		0x0001
+#define REG_NOTEOL		0x0002
+#define REG_NOMATCH		0x0004
+#define REG_BADPAT		0x0008
+#define REG_ECOLLATE	0x0010
+#define REG_ECTYPE		0x0020
+#define REG_EESCAPE		0x0040
+#define REG_ESUBREG		0x0080
+#define REG_EBRACK		0x0100
+#define REG_EPAREN		0x0200
+#define REG_EBRACE		0x0400
+#define REG_BADBR		0x0800
+#define REG_ERANGE		0x1000
+#define REG_ESPACE		0x2000
+#define REG_BADRPT		0x4000
+
+int		regcomp(regex_t* __restrict preg, const char* __restrict pattern, int cflags);
+size_t	regerror(int errcode, const regex_t* __restrict preg, char* __restrict errbuf, size_t errbuf_size);
+int		regexec(const regex_t* __restrict preg, const char* __restrict string, size_t nmatch, regmatch_t pmatch[__restrict], int eflags);
+void	regfree(regex_t* preg);
+
+__END_DECLS
+
+#endif

libc/include/sched.h

@@ -0,0 +1,40 @@
+#ifndef _SCHED_H
+#define _SCHED_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sched.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#include <time.h>
+
+#define __need_pid_t
+#include <sys/types.h>
+
+struct sched_param
+{
+	int				sched_priority;			/* Process or thread execution scheduling priority. */
+	int				sched_ss_low_priority;  /* Low scheduling priority for sporadic server. */
+	struct timespec	sched_ss_repl_period;	/* Replenishment period for sporadic server. */
+	struct timespec	sched_ss_init_budget;	/* Initial budget for sporadic server. */
+	int				sched_ss_max_repl;		/* Maximum pending replenishments for sporadic server. */
+};
+
+#define SCHED_FIFO		1
+#define SCHED_RR		2
+#define SCHED_SPORADIC	3
+#define SCHED_OTHER		4
+
+int sched_get_priority_max(int policy);
+int sched_get_priority_min(int policy);
+int sched_getparam(pid_t pid, struct sched_param* param);
+int sched_getscheduler(pid_t pid);
+int sched_rr_get_interval(pid_t pid, struct timespec* interval);
+int sched_setparam(pid_t pid, const struct sched_param* param);
+int sched_setscheduler(pid_t pid, int, const struct sched_param* param);
+int sched_yield(void);
+
+__END_DECLS
+
+#endif

libc/include/search.h

@@ -0,0 +1,36 @@
+#ifndef _SEARCH_H
+#define _SEARCH_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/search.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_size_t
+#include <sys/types.h>
+
+typedef struct
+{
+	char* key;
+	void* data;
+} ENTRY;
+
+typedef enum { FIND, ENTER } ACTION;
+typedef enum { preorder, postorder, endorder, leaf } VISIT;
+
+int		hcreate(size_t nel);
+void	hdestroy(void);
+ENTRY*	hsearch(ENTRY item, ACTION action);
+void	insque(void* element, void* pred);
+void*	lfind(const void* key, const void* base, size_t* nelp, size_t width, int (*compar)(const void*, const void*));
+void*	lsearch(const void* key, void* base, size_t* nelp, size_t width, int (*compar)(const void*, const void*));
+void	remque(void* element);
+void*	tdelete(const void* __restrict key, void** __restrict rootp, int(*compar)(const void*, const void*));
+void*	tfind(const void* key, void* const* rootp, int(*compar)(const void*, const void*));
+void*	tsearch(const void* key, void** rootp, int(*compar)(const void*, const void*));
+void	twalk(const void* root, void (*action)(const void*, VISIT, int));
+
+__END_DECLS
+
+#endif

libc/include/semaphore.h

@@ -0,0 +1,30 @@
+#ifndef _SEMAPHORE_H
+#define _SEMAPHORE_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/semaphore.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#include <fcntl.h>
+#include <time.h>
+
+typedef void* sem_t;
+
+#define SEM_FAILED ((sem_t*)0)
+
+int		sem_close(sem_t* sem);
+int		sem_destroy(sem_t* sem);
+int		sem_getvalue(sem_t* __restrict sem, int* __restrict sval);
+int		sem_init(sem_t* sem, int pshared, unsigned value);
+sem_t*	sem_open(const char* name, int oflag, ...);
+int		sem_post(sem_t* sem);
+int		sem_timedwait(sem_t* __restrict sem, const struct timespec* __restrict abstime);
+int		sem_trywait(sem_t* sem);
+int		sem_unlink(const char* name);
+int		sem_wait(sem_t* sem);
+
+__END_DECLS
+
+#endif

libc/include/setjmp.h

@@ -1,19 +1,20 @@
-#pragma once
+#ifndef _SETJMP_H
-
+#define _SETJMP_H 1
-#include <sys/cdefs.h>
 
 // https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/setjmp.h.html
 
+#include <sys/cdefs.h>
+
 __BEGIN_DECLS
 
-typedef int* jmp_buf;
+typedef int jmp_buf[1];
-typedef int* sigjmp_buf;
+typedef int sigjmp_buf[1];
 
-void	_longjmp(jmp_buf, int);
+void	longjmp(jmp_buf env, int val);
-void	longjmp(jmp_buf, int);
+void	siglongjmp(sigjmp_buf env, int val);
-void	siglongjmp(sigjmp_buf, int);
+int		setjmp(jmp_buf env);
-int		_setjmp(jmp_buf);
+int		sigsetjmp(sigjmp_buf env, int savemask);
-int		setjmp(jmp_buf);
-int		sigsetjmp(sigjmp_buf, int);
 
 __END_DECLS
+
+#endif

libc/include/signal.h

@@ -1,12 +1,167 @@
-#pragma onces
+#ifndef _SIGNAL_H
+#define _SIGNAL_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/signal.h.html
 
 #include <sys/cdefs.h>
 
 __BEGIN_DECLS
 
-typedef int sig_atomic_t;
+#include <time.h>
 
-int		raise(int);
+#define SIG_DFL		1
-void	(*signal(int, void (*)(int)))(int);
+#define SIG_ERR		2
+#define SIG_HOLD	3
+#define SIG_IGN		4
+
+#define __need_pthread_t
+#define __need_size_t
+#define __need_uid_t
+#define __need_pid_t
+#define __need_pthread_attr_t
+#include <sys/types.h>
+
+typedef int sigatomic_t;
+typedef void* sigset_t;
+
+union sigval
+{
+	int		sival_int; /* Integer signal value. */
+	void*	sival_ptr; /* Pointer signal value. */
+};
+
+struct sigevent
+{
+	int				sigev_notify;					/* Notification type. */
+	int				sigev_signo;					/* Signal number. */
+	union sigval	sigev_value;					/* Signal value. */
+	void (*sigev_notify_function)(union sigval);	/* Notification function. */
+	pthread_attr_t*	sigev_notify_attributes;  		/* Notification attributes. */
+};
+
+#define SIGEV_NONE		1
+#define SIGEV_SIGNAL	2
+#define SIGEV_THREAD	3
+
+#define SIGABRT 	1
+#define SIGALRM 	2
+#define SIGBUS 		3
+#define SIGCHLD 	4
+#define SIGCONT 	5
+#define SIGFPE 		6
+#define SIGHUP 		7
+#define SIGILL 		8
+#define SIGINT 		9
+#define SIGKILL 	10
+#define SIGPIPE 	11
+#define SIGQUIT 	12
+#define SIGSEGV 	13
+#define SIGSTOP 	14
+#define SIGTERM 	15
+#define SIGTSTP 	16
+#define SIGTTIN 	17
+#define SIGTTOU 	18
+#define SIGUSR1 	19
+#define SIGUSR2 	20
+#define SIGPOLL 	21
+#define SIGPROF 	22
+#define SIGSYS 		23
+#define SIGTRAP 	24
+#define SIGURG 		25
+#define SIGVTALRM 	26
+#define SIGXCPU 	27
+#define SIGXFSZ 	28
+#define SIGRTMIN	29
+#define SIGRTMAX	(SIGRTMIN+32)
+
+#define SIG_BLOCK	1
+#define SIG_UNBLOCK	2
+#define SIG_SETMASK	3
+
+#define SA_NOCLDSTOP	0x001
+#define SA_ONSTACK		0x002
+#define SA_RESETHAND	0x004
+#define SA_RESTART		0x008
+#define SA_SIGINFO		0x010
+#define SA_NOCLDWAIT	0x020
+#define SA_NODEFER		0x040
+#define SS_ONSTACK		0x080
+#define SS_DISABLE		0x100
+#define MINSIGSTKSZ		0x200
+#define SIGSTKSZ		0x400
+
+typedef struct
+{
+	void**	ss_sp;		/* Stack base or pointer. */
+	size_t	ss_size;	/* Stack size. */
+	int		ss_flags;	/* Flags. */
+} stack_t;
+
+typedef struct {} mcontext_t;
+
+typedef struct __ucontext_t
+{
+	struct __ucontext_t*	uc_link;		/* Pointer to the context that is resumed when this context returns. */
+	sigset_t				uc_sigmask;		/* The set of signals that are blocked when this context is active. */
+	stack_t					uc_stack;		/* The stack used by this context. */
+	mcontext_t				uc_mcontext;	/* A machine-specific representation of the saved context. */
+} ucontext_t;
+
+typedef struct
+{
+	int				si_signo;	/* Signal number. */
+	int				si_code;	/* Signal code. */
+	int				si_errno;	/* If non-zero, an errno value associated with this signal, as described in <errno.h>. */
+	pid_t			si_pid;		/* Sending process ID. */
+	uid_t			si_uid;		/* Real user ID of sending process. */
+	void*			si_addr;	/* Address of faulting instruction. */
+	int				si_status;	/* Exit value or signal. */
+	long			si_band;	/* Band event for SIGPOLL. */
+	union sigval	si_value;	/* Signal value. */
+} siginfo_t;
+
+struct sigaction
+{
+	void (*sa_handler)(int);						/* Pointer to a signal-catching function or one of the SIG_IGN or SIG_DFL. */
+	sigset_t	sa_mask;							/* Set of signals to be blocked during execution of the signal handling function. */
+	int			sa_flags;							/* Special flags. */
+	void (*sa_sigaction)(int, siginfo_t*, void*);	/* Pointer to a signal-catching function. */
+};
+
+// TODO: The <signal.h> header shall define the symbolic constants in the
+//       Code column of the following table for use as values of si_code
+//       that are signal-specific or non-signal-specific reasons why the
+//       signal was generated.
+
+int		kill(pid_t pid, int sig);
+int		killpg(pid_t pgpr, int sig);
+void	psiginfo(const siginfo_t* pinfo, const char* message);
+void	psignal(int signum, const char* message);
+int		pthread_kill(pthread_t thread, int sig);
+int		pthread_sigmask(int how, const sigset_t* __restrict set, sigset_t* __restrict oset);
+int		raise(int sig);
+int		sigaction(int sig, const struct sigaction* __restrict act, struct sigaction* __restrict oact);
+int		sigaddset(sigset_t* set, int signo);
+int		sigaltstack(const stack_t* __restrict ss, stack_t* __restrict oss);
+int		sigdelset(sigset_t* set, int signo);
+int		sigemptyset(sigset_t* set);
+int		sigfillset(sigset_t* set);
+int		sighold(int sig);
+int		sigignore(int sig);
+int		siginterrupt(int sig, int flag);
+int		sigismember(const sigset_t* set, int signo);
+void	(*signal(int sig, void (*func)(int)))(int);
+int		sigpause(int sig);
+int		sigpending(sigset_t* set);
+int		sigprocmask(int how, const sigset_t* __restrict set, sigset_t* __restrict oset);
+int		sigqueue(pid_t pid, int signo, union sigval value);
+int		sigrelse(int sig);
+void	(*sigset(int sig, void (*disp)(int)))(int);
+int		sigsuspend(const sigset_t* sigmask);
+int		sigtimedwait(const sigset_t* __restrict set, siginfo_t* __restrict info, const struct timespec* __restrict timeout);
+int		sigwait(const sigset_t* __restrict set, int* __restrict sig);
+int		sigwaitinfo(const sigset_t* __restrict set, siginfo_t* __restrict info);
 
 __END_DECLS
+
+#endif

libc/include/spawn.h

@@ -0,0 +1,51 @@
+#ifndef _SPAWN_H
+#define _SPAWN_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/spawn.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#include <sched.h>
+#include <signal.h>
+
+#define __need_mode_t
+#define __need_pid_t
+#include <sys/types.h>
+
+typedef int posix_spawnattr_t;
+typedef int posix_spawn_file_actions_t;
+
+#define POSIX_SPAWN_RESETIDS		0x01
+#define POSIX_SPAWN_SETPGROUP		0x02
+#define POSIX_SPAWN_SETSCHEDPARAM	0x04
+#define POSIX_SPAWN_SETSCHEDULER	0x08
+#define POSIX_SPAWN_SETSIGDEF		0x10
+#define POSIX_SPAWN_SETSIGMASK		0x20
+
+int posix_spawn(pid_t* __restrict pid, const char* __restrict path, const posix_spawn_file_actions_t* file_actions, const posix_spawnattr_t* __restrict attrp, char* const argv[__restrict], char* const envp[__restrict]);
+int posix_spawn_file_actions_addclose(posix_spawn_file_actions_t* file_actions, int fildes);
+int posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t* file_actions, int fildes, int newfildes);
+int posix_spawn_file_actions_addopen(posix_spawn_file_actions_t* __restrict file_actions, int fildes, const char* __restrict path, int oflag, mode_t mode);
+int posix_spawn_file_actions_destroy(posix_spawn_file_actions_t* file_actions);
+int posix_spawn_file_actions_init(posix_spawn_file_actions_t* file_actions);
+int posix_spawnattr_destroy(posix_spawnattr_t* attr);
+int posix_spawnattr_getflags(const posix_spawnattr_t* __restrict attr, short* __restrict flags);
+int posix_spawnattr_getpgroup(const posix_spawnattr_t* __restrict attr, pid_t* __restrict pgroup);
+int posix_spawnattr_getschedparam(const posix_spawnattr_t* __restrict attr, struct sched_param* __restrict schedparam);
+int posix_spawnattr_getschedpolicy(const posix_spawnattr_t* __restrict attr, int* __restrict schedpolicy);
+int posix_spawnattr_getsigdefault(const posix_spawnattr_t* __restrict attr, sigset_t* __restrict sigdefault);
+int posix_spawnattr_getsigmask(const posix_spawnattr_t* __restrict attr, sigset_t* __restrict sigmask);
+int posix_spawnattr_init(posix_spawnattr_t* attr);
+int posix_spawnattr_setflags(posix_spawnattr_t* attr, short flags);
+int posix_spawnattr_setpgroup(posix_spawnattr_t* attr, pid_t pgroup);
+int posix_spawnattr_setschedparam(posix_spawnattr_t* __restrict attr, const struct sched_param* __restrict schedparam);
+int posix_spawnattr_setschedpolicy(posix_spawnattr_t* attr, int schedpolicy);
+int posix_spawnattr_setsigdefault(posix_spawnattr_t* __restrict attr, const sigset_t* __restrict sigdefault);
+int posix_spawnattr_setsigmask(posix_spawnattr_t* __restrict attr, const sigset_t* __restrict sigmask);
+int posix_spawnp(pid_t* __restrict pid, const char* __restrict file, const posix_spawn_file_actions_t* file_actions, const posix_spawnattr_t* __restrict attrp, char* const argc[__restrict], char* const envp[__restrict]);
+
+__END_DECLS
+
+#endif

libc/include/stdint.h

@@ -0,0 +1,117 @@
+#ifndef _STDINT_H
+#define _STDINT_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/stdint.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+typedef __INT8_TYPE__ int8_t;
+typedef __INT16_TYPE__ int16_t;
+typedef __INT32_TYPE__ int32_t;
+typedef __INT64_TYPE__ int64_t;
+
+typedef __UINT8_TYPE__ uint8_t;
+typedef __UINT16_TYPE__ uint16_t;
+typedef __UINT32_TYPE__ uint32_t;
+typedef __UINT64_TYPE__ uint64_t;
+
+typedef __INT_LEAST8_TYPE__ int_least8_t;
+typedef __INT_LEAST16_TYPE__ int_least16_t;
+typedef __INT_LEAST32_TYPE__ int_least32_t;
+typedef __INT_LEAST64_TYPE__ int_least64_t;
+
+typedef __UINT_LEAST8_TYPE__ uint_least8_t;
+typedef __UINT_LEAST16_TYPE__ uint_least16_t;
+typedef __UINT_LEAST32_TYPE__ uint_least32_t;
+typedef __UINT_LEAST64_TYPE__ uint_least64_t;
+
+typedef __INT_FAST8_TYPE__ int_fast8_t;
+typedef __INT_FAST16_TYPE__ int_fast16_t;
+typedef __INT_FAST32_TYPE__ int_fast32_t;
+typedef __INT_FAST64_TYPE__ int_fast64_t;
+
+typedef __UINT_FAST8_TYPE__ uint_fast8_t;
+typedef __UINT_FAST16_TYPE__ uint_fast16_t;
+typedef __UINT_FAST32_TYPE__ uint_fast32_t;
+typedef __UINT_FAST64_TYPE__ uint_fast64_t;
+
+typedef __INTPTR_TYPE__ intptr_t;
+typedef __UINTPTR_TYPE__ uintptr_t;
+
+// FIXME: is this the correct?
+typedef int64_t intmax_t;
+typedef uint64_t uintmax_t;
+
+#define INT8_MIN (-INT8_MAX - 1)
+#define INT16_MIN (-INT16_MAX - 1)
+#define INT32_MIN (-INT32_MAX - 1)
+#define INT64_MIN (-INT64_MAX - 1)
+
+#define INT8_MAX __INT8_MAX__
+#define INT16_MAX __INT16_MAX__
+#define INT32_MAX __INT32_MAX__
+#define INT64_MAX __INT64_MAX__
+
+#define UINT8_MAX __UINT8_MAX__
+#define UINT16_MAX __UINT16_MAX__
+#define UINT32_MAX __UINT32_MAX__
+#define UINT64_MAX __UINT64_MAX__
+
+#define INT_LEAST8_MIN (-INT_LEAST8_MAX - 1)
+#define INT_LEAST16_MIN (-INT_LEAST16_MAX - 1)
+#define INT_LEAST32_MIN (-INT_LEAST32_MAX - 1)
+#define INT_LEAST64_MIN (-INT_LEAST64_MAX - 1)
+
+#define INT_LEAST8_MAX __INT_LEAST8_MAX__
+#define INT_LEAST16_MAX __INT_LEAST16_MAX__
+#define INT_LEAST32_MAX __INT_LEAST32_MAX__
+#define INT_LEAST64_MAX __INT_LEAST64_MAX__
+
+#define UINT_LEAST8_MAX __UINT_LEAST8_MAX__
+#define UINT_LEAST16_MAX __UINT_LEAST16_MAX__
+#define UINT_LEAST32_MAX __UINT_LEAST32_MAX__
+#define UINT_LEAST64_MAX __UINT_LEAST64_MAX__
+
+#define INT_FAST8_MIN (-INT_FAST8_MAX - 1)
+#define INT_FAST16_MIN (-INT_FAST16_MAX - 1)
+#define INT_FAST32_MIN (-INT_FAST32_MAX - 1)
+#define INT_FAST64_MIN (-INT_FAST64_MAX - 1)
+
+#define INT_FAST8_MAX __INT_FAST8_MAX__
+#define INT_FAST16_MAX __INT_FAST16_MAX__
+#define INT_FAST32_MAX __INT_FAST32_MAX__
+#define INT_FAST64_MAX __INT_FAST64_MAX__
+
+#define UINT_FAST8_MAX __UINT_FAST8_MAX__
+#define UINT_FAST16_MAX __UINT_FAST16_MAX__
+#define UINT_FAST32_MAX __UINT_FAST32_MAX__
+#define UINT_FAST64_MAX __UINT_FAST64_MAX__
+
+#define INTPTR_MIN (-INTPTR_MAX - 1)
+#define INTPTR_MAX __INTPTR_MAX__
+#define UINPTR_MAX __UINTPTR_MAX__
+
+// FIXME: is this the correct?
+#define INTMAX_MIN INT64_MIN
+#define INTMAX_MAX INT64_MAX
+#define UINTMAX_MAX UINT64_MAX
+
+#define PTRDIFF_MIN -65535
+#define PTRDIFF_MAX +65535
+
+#define SIG_ATOMIC_MIN __SIG_ATOMIC_MIN__
+#define SIG_ATOMIC_MAX __SIG_ATOMIC_MAX__
+
+#define SIZE_MAX __SIZE_MAX__
+
+#define WCHAR_MIN __WCHAR_MIN__
+#define WCHAR_MAX __WCHAR_MAX__
+
+#define WINT_MIN __WINT_MIN__
+#define WINT_MAX __WINT_MAX__
+
+__END_DECLS
+
+#endif

libc/include/stdio.h

@@ -1,106 +1,128 @@
-#pragma once
+#ifndef _STDIO_H
+#define _STDIO_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/stdio.h.html
 
-#include <stddef.h>
-#include <stdarg.h>
 #include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_off_t
+#define __need_ssize_t
 #include <sys/types.h>
 
-#define EOF (-1)
+#ifndef __va_list_defined
+	#define __va_list_defined
+	#define __need___va_list
+	#include <stdarg.h>
+	typedef __gnuc_va_list va_list;
+#endif
 
-#define stdin stdin
+#define __need_size_t
-#define stdout stdout
+#define __need_NULL
-#define stderr stderr
+#include <stddef.h>
 
-#define SEEK_CUR 1
+#include <bits/types/FILE.h>
-#define SEEK_END 2
+
-#define SEEK_SET 3
+typedef off_t fpos_t;
+
+#define BUFSIZ 1024
+#define L_ctermid 20
+#define L_tmpnam 20
 
 #define _IOFBF 1
 #define _IOLBF 2
 #define _IONBF 3
 
-#define EXIT_FAILURE 1
+// NOTE: also defined in fcntl.h
-#define EXIT_SUCCESS 0
+#define SEEK_SET 1
-
+#define SEEK_CUR 2
-#define L_ctermid 50
+#define SEEK_END 3
-
-#define BUFSIZ 128
 
+#define FILENAME_MAX 256
 #define FOPEN_MAX 16
+#define TMP_MAX 10000
 
-__BEGIN_DECLS
+#define EOF (-1)
 
-struct FILE;
+#define P_tmpdir "/tmp"
-typedef struct FILE FILE;
 
-typedef uint64_t fpos_t;
+extern FILE* __stdin;
+#define stdin __stdin
+extern FILE* __stdout;
+#define stdout __stdout
+extern FILE* __stderr;
+#define stderr __stderr
 
-extern FILE* stdin;
+void	clearerr(FILE* stream);
-extern FILE* stdout;
+char*	ctermid(char* s);
-extern FILE* stderr;
+int		dprintf(int fildes, const char* __restrict format, ...);
-
+int		fclose(FILE* stream);
-
+FILE*	fdopen(int fildes, const char* mode);
-// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/stdio.h.html
+int		feof(FILE* stream);
-void	clearerr(FILE*);
+int		ferror(FILE* stream);
-char*	ctermid(char*);
+int		fflush(FILE* stream);
-int		fclose(FILE*);
+int		fgetc(FILE* stream);
-FILE*	fdopen(int, const char*);
+int		fgetpos(FILE* __restrict stream, fpos_t* __restrict pos);
-int		feof(FILE*);
+char*	fgets(char* __restrict s, int n, FILE* __restrict stream);
-int		ferror(FILE*);
+int		fileno(FILE* stream);
-int		fflush(FILE*);
+void	flockfile(FILE* stream);
-int		fgetc(FILE*);
+FILE*	fmemopen(void* __restrict buf, size_t size, const char* __restrict mode);
-int		fgetpos(FILE*, fpos_t*);
+FILE*	fopen(const char* __restrict pathname, const char* __restrict mode);
-char*	fgets(char*, int, FILE*);
+int		fprintf(FILE* __restrict stream, const char* __restrict format, ...);
-int		fileno(FILE*);
+int		fputc(int c, FILE* stream);
-void	flockfile(FILE*);
+int		fputs(const char* __restrict s, FILE* __restrict stream);
-FILE*	fopen(const char*, const char*);
+size_t	fread(void* __restrict buf, size_t size, size_t nitems, FILE* __restrict stream);
-int		fprintf(FILE*, const char*, ...);
+FILE*	freopen(const char* __restrict pathname, const char* __restrict mode, FILE* __restrict stream);
-int		fputc(int, FILE*);
+int		fscanf(FILE* __restrict stream, const char* __restrict format, ...);
-int		fputs(const char*, FILE*);
+int		fseek(FILE* stream, long offset, int whence);
-size_t	fread(void*, size_t, size_t, FILE*);
+int		fseeko(FILE* stream, off_t offset, int whence);
-FILE*	freopen(const char*, const char*, FILE*);
+int		fsetpos(FILE* stream, const fpos_t* pos);
-int		fscanf(FILE*, const char*, ...);
+long	ftell(FILE* stream);
-int		fseek(FILE*, long, int);
+off_t	ftello(FILE* stream);
-int		fseeko(FILE*, off_t, int);
+int		ftrylockfile(FILE* stream);
-int		fsetpos(FILE*, const fpos_t*);
+void	funlockfile(FILE* stream);
-long	ftell(FILE*);
+size_t	fwrite(const void* __restrict ptr, size_t size, size_t nitems, FILE* __restrict stream);
-off_t	ftello(FILE*);
+int		getc(FILE* stream);
-int		ftrylockfile(FILE*);
-void	funlockfile(FILE*);
-size_t	fwrite(const void*, size_t, size_t, FILE*);
-int		getc(FILE*);
 int		getchar(void);
-int		getc_unlocked(FILE*);
+int		getc_unlocked(FILE* stream);
 int		getchar_unlocked(void);
-char*	gets(char*);
+ssize_t	getdelim(char** __restrict lineptr, size_t* __restrict n, int delimeter, FILE* __restrict stream);
-int		pclose(FILE*);
+ssize_t	getline(char** __restrict lineptr, size_t* __restrict n, FILE* __restrict stream);
-void	perror(const char*);
+char*	gets(char* s);
-FILE*	popen(const char*, const char*);
+FILE*	open_memstream(char** bufp, size_t* sizep);
-int		printf(const char*, ...);
+int		pclose(FILE* stream);
-int		putc(int, FILE*);
+void	perror(const char* s);
-int		putchar(int);
+FILE*	popen(const char* command, const char* mode);
-int		putc_unlocked(int, FILE*);
+int		printf(const char* __restrict format, ...);
-int		putchar_unlocked(int);
+int		putc(int c, FILE* stream);
-int		puts(const char*);
+int		putchar(int c);
-int		remove(const char*);
+int		putc_unlocked(int c, FILE* stream);
-int		rename(const char*, const char*);
+int		putchar_unlocked(int c);
-void	rewind(FILE*);
+int		puts(const char* s);
-int		scanf(const char*, ...);
+int		remove(const char* path);
-void	setbuf(FILE*, char*);
+int		rename(const char* old, const char* _new);
-int		setvbuf(FILE*, char*, int, size_t);
+int		renameat(int oldfd, const char* old, int newfd, const char* _new);
-int		snprintf(char*, size_t, const char*, ...);
+void	rewind(FILE* stream);
-int		sprintf(char*, const char*, ...);
+int		scanf(const char* __restrict format, ...);
-int		sscanf(const char*, const char*, ...);
+void	setbuf(FILE* __restrict stream, char* __restrict buf);
-char*	tempnam(const char*, const char*);
+int		setvbuf(FILE* __restrict stream, char* __restrict buf, int type, size_t size);
+int		snprintf(char* __restrict s, size_t n, const char* __restrict format, ...);
+int		sprintf(char* __restrict s, const char* __restrict format, ...);
+int		sscanf(const char* __restrict s, const char* __restrict format, ...);
+char*	tempnam(const char* dir, const char* pfx);
 FILE*	tmpfile(void);
-char*	tmpnam(char*);
+char*	tmpnam(char* s);
-int		ungetc(int, FILE*);
+int		ungetc(int c, FILE* stream);
-int		vfprintf(FILE*, const char*, va_list);
+int		vdprintf(int fildes, const char* __restrict format, va_list ap);
-int		vfscanf(FILE*, const char*, va_list);
+int		vfprintf(FILE* __restrict stream, const char* __restrict format, va_list ap);
-int		vprintf(const char*, va_list);
+int		vfscanf(FILE* __restrict stream, const char* __restrict format, va_list arg);
-int		vscanf(const char*, va_list);
+int		vprintf(const char* __restrict format, va_list ap);
-int		vsnprintf(char*, size_t, const char*, va_list);
+int		vscanf(const char* __restrict format, va_list arg);
-int		vsprintf(char*, const char*, va_list);
+int		vsnprintf(char* __restrict s, size_t n, const char* __restrict format, va_list ap);
-int		vsscanf(const char*, const char*, va_list);
+int		vsprintf(char* __restrict s, const char* __restrict format, va_list ap);
+int		vsscanf(const char* __restrict s, const char* __restrict format, va_list arg);
 
 __END_DECLS
+
+#endif

libc/include/stdlib.h

@@ -1,93 +1,108 @@
-#pragma once
+#ifndef _STDLIB_H
+#define _STDLIB_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/stdlib.h.html
 
-#include <stddef.h>
 #include <sys/cdefs.h>
 
 __BEGIN_DECLS
 
+#include <stddef.h>
+#include <limits.h>
+#include <math.h>
+#include <sys/wait.h>
+
+#define EXIT_FAILURE 1
+#define EXIT_SUCCESS 0
+
+#define RAND_MAX INT32_MAX
+
+#define MB_CUR_MAX ((size_t)4)
+
 typedef struct
 {
-	int quot;
+	int quot;	/* quotient */
-	int rem;
+	int rem;	/* remainder */
 } div_t;
 
 typedef struct
 {
-	long quot;
+	long quot;	/* quotient */
-	long rem;
+	long rem;	/* remainder */
 } ldiv_t;
 
 typedef struct
 {
-	long long quot;
+	long long quot;	/* quotient */
-	long long rem;
+	long long rem;	/* remainder */
 } lldiv_t;
 
-// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/stdlib.h.html
+[[noreturn]] void	_Exit(int status);
-void		_Exit(int);
+long				a64l(const char* s);
-long		a64l(const char*);
+[[noreturn]] void	abort(void);
-void		abort(void);
+int					abs(int i);
-int			abs(int);
+int					atexit(void (*func)(void));
-int			atexit(void (*)(void));
+double				atof(const char* str);
-double		atof(const char*);
+int					atoi(const char* str);
-int			atoi(const char*);
+long				atol(const char* str);
-long		atol(const char*);
+long long			atoll(const char* str);
-long long	atoll(const char*);
+void*				bsearch(const void* key, const void* base, size_t nel, size_t width, int (*compar)(const void*, const void*));
-void*		bsearch(const void*, const void*, size_t, size_t, int (*)(const void*, const void*));
+void*				calloc(size_t nelem, size_t elsize);
-void*		calloc(size_t, size_t);
+div_t				div(int numer, int denom);
-div_t		div(int, int);
 double				drand48(void);
-double		erand48(unsigned short[3]);
+double				erand48(unsigned short xsubi[3]);
-void		exit(int);
+void				exit(int status);
-void		free(void*);
+void				free(void* ptr);
-char*		getenv(const char*);
+char*				getenv(const char* name);
-int			getsubopt(char**, char* const*, char**);
+int					getsubopt(char** optionp, char* const* keylistp, char** valuep);
-int			grantpt(int);
+int					grantpt(int fildes);
-char*		initstate(unsigned, char*, size_t);
+char*				initstate(unsigned seed, char* state, size_t size);
-long		jrand48(unsigned short[3]);
+long				jrand48(unsigned short xsubi[3]);
-char*		l64a(long);
+char*				l64a(long value);
-long		labs(long);
+long				labs(long i);
-void		lcong48(unsigned short[7]);
+void				lcong48(unsigned short param[7]);
-ldiv_t		ldiv(long, long);
+ldiv_t				ldiv(long numer, long denom);
-long long	llabs(long long);
+long long			llabs(long long i);
-lldiv_t		lldiv(long long, long long);
+lldiv_t				lldiv(long long numer, long long denom);
 long				lrand48(void);
-void*		malloc(size_t);
+void*				malloc(size_t size);
-int			mblen(const char*, size_t);
+int					mblen(const char* s, size_t n);
-size_t		mbstowcs(wchar_t*, const char*, size_t);
+size_t				mbstowcs(wchar_t* __restrict pwcs, const char* __restrict s, size_t n);
-int			mbtowc(wchar_t*, const char*, size_t);
+int					mbtowc(wchar_t* __restrict pwc, const char* __restrict s, size_t n);
-char*		mkdtemp(char*);
+char*				mkdtemp(char* _template);
-int			mkstemp(char*);
+int					mkstemp(char* _template);
 long				mrand48(void);
-long		nrand48(unsigned short[3]);
+long				nrand48(unsigned short xsubi[3]);
-int			posix_memalign(void**, size_t, size_t);
+int					posix_memalign(void** memptr, size_t alignment, size_t size);
-int			posix_openpt(int);
+int					posix_openpt(int oflag);
-char*		ptsname(int);
+char*				ptsname(int fildes);
-int			putenv(char*);
+int					putenv(char* string);
-void		qsort(void*, size_t, size_t, int (*)(const void*, const void*));
+void				qsort(void* base, size_t nel, size_t width, int (*compar)(const void*, const void*));
 int					rand(void);
-int			rand_r(unsigned*);
+int					rand_r(unsigned* seed);
 long				random(void);
-void*		realloc(void*, size_t);
+void*				realloc(void* ptr, size_t size);
-char*		realpath(const char*, char*);
+char*				realpath(const char* __restrict file_name, char* __restrict resolved_name);
-unsigned short* seed48(unsigned short[3]);
+unsigned short*		seed48(unsigned short seed16v[3]);
-int			setenv(const char*, const char*, int);
+int					setenv(const char* envname, const char* envval, int overwrite);
-void		setkey(const char*);
+void				setkey(const char* key);
-char*		setstate(char*);
+char*				setstate(char* state);
-void		srand(unsigned);
+void				srand(unsigned seed);
-void		srand48(long);
+void				srand48(long seedval);
-void		srandom(unsigned);
+void				srandom(unsigned seed);
-double		strtod(const char*, char**);
+double				strtod(const char* __restrict nptr, char** __restrict endptr);
-float		strtof(const char*, char**);
+float				strtof(const char* __restrict nptr, char** __restrict endptr);
-long		strtol(const char*, char**, int);
+long				strtol(const char* __restrict nptr, char** __restrict endptr, int base);
-long double	strtold(const char*, char**);
+long double			strtold(const char* __restrict nptr, char** __restrict endptr);
-long long	strtoll(const char*, char**, int);
+long long			strtoll(const char* __restrict nptr, char** __restrict endptr, int base);
-unsigned long strtoul(const char*, char**, int);
+unsigned long		strtoul(const char* __restrict nptr, char** __restrict endptr, int base);
-unsigned long long strtoull(const char*, char**, int);
+unsigned long long	strtoull(const char* __restrict nptr, char** __restrict endptr, int base);
-int			system(const char*);
+int					system(const char* command);
-int			unlockpt(int);
+int					unlockpt(int fildes);
-int			unsetenv(const char*);
+int					unsetenv(const char* name);
-size_t		wcstombs(char*, const wchar_t*, size_t);
+size_t				wcstombs(char* __restrict s, const wchar_t* __restrict pwcs, size_t n);
-int			wctomb(char*, wchar_t);
+int					wctomb(char* s, wchar_t wchar);
 
 __END_DECLS
+
+#endif

libc/include/string.h

@@ -1,47 +1,54 @@
-#pragma once
+#ifndef _STRING_H
+#define _STRING_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/string.h.html
 
-#include <locale.h>
-#include <stddef.h>
 #include <sys/cdefs.h>
 
 __BEGIN_DECLS
 
-void*	memccpy(void*, const void*, int, size_t);
+#include <stddef.h>
-void*	memchr(const void*, int, size_t);
+#include <bits/types/locale_t.h>
-int		memcmp(const void*, const void*, size_t);
+
-void*	memcpy(void*, const void*, size_t);
+void*	memccpy(void* __restrict s1, const void* __restrict s2, int c, size_t n);
-void*	memmove(void*, const void*, size_t);
+void*	memchr(const void* s, int c, size_t n);
-void*	memset(void*, int, size_t);
+int		memcmp(const void* s1, const void* s2, size_t n);
-char*	stpcpy(char*, const char*);
+void*	memcpy(void* __restrict s1, const void* __restrict s2, size_t n);
-char*	stpncpy(char*, const char*, size_t);
+void*	memmove(void* s1, const void* s2, size_t n);
-char*	strcat(char*, const char*);
+void*	memset(void* s, int c, size_t n);
-char*	strchr(const char*, int);
+char*	stpcpy(char* __restrict s1, const char* __restrict s2);
-int		strcmp(const char*, const char*);
+char*	stpncpy(char* __restrict s1, const char* __restrict s2, size_t n);
-int		strcoll(const char*, const char*);
+char*	strcat(char* __restrict s1, const char* __restrict s2);
-int		strcoll_l(const char*, const char*, locale_t);
+char*	strchr(const char* s, int c);
-char*	strcpy(char*, const char*);
+int		strcmp(const char* s1, const char* s2);
-size_t	strcspn(const char*, const char*);
+int		strcoll(const char* s1, const char* s2);
-char*	strdup(const char*);
+int		strcoll_l(const char* s1, const char* s2, locale_t locale);
-char*	strerror(int);
+char*	strcpy(char* __restrict s1, const char* __restrict s2);
-char*	strerror_l(int, locale_t);
+size_t	strcspn(const char* , const char* );
-int		strerror_r(int, char*, size_t);
+char*	strdup(const char* s);
-size_t	strlen(const char*);
+char*	strerror(int errnum);
-char*	strncat(char*, const char*, size_t);
+char*	strerror_l(int errnum, locale_t locale);
-int		strncmp(const char*, const char*, size_t);
+int		strerror_r(int errnum, char* strerrbuf, size_t buflen);
-char*	strncpy(char*, const char*, size_t);
+size_t	strlen(const char* s);
-char*	strndup(const char*, size_t);
+char*	strncat(char* __restrict s1, const char* __restrict s2, size_t n);
-size_t	strnlen(const char*, size_t);
+int		strncmp(const char* s1, const char* s2, size_t n);
-char*	strpbrk(const char*, const char*);
+char*	strncpy(char* __restrict s1, const char* __restrict s2, size_t n);
-char*	strrchr(const char*, int);
+char*	strndup(const char* s, size_t n);
-char*	strsignal(int);
+size_t	strnlen(const char* s, size_t maxlen);
-size_t	strspn(const char*, const char*);
+char*	strpbrk(const char* s1, const char* s2);
-char*	strstr(const char*, const char*);
+char*	strrchr(const char* s, int c);
-char*	strtok(char*, const char*);
+char*	strsignal(int signum);
-char*	strtok_r(char*, const char*, char**);
+size_t	strspn(const char* s1, const char* s2);
-size_t	strxfrm(char*, const char*, size_t);
+char*	strstr(const char* s1, const char* s2);
-size_t	strxfrm_l(char*, const char*, size_t, locale_t);
+char*	strtok(char* __restrict s, const char* __restrict sep);
+char*	strtok_r(char* __restrict s, const char* __restrict sep, char** __restrict state);
+size_t	strxfrm(char* __restrict s1, const char* __restrict s2, size_t n);
+size_t	strxfrm_l(char* __restrict s1, const char* __restrict s2, size_t n, locale_t locale);
+
+const char* strerrorname_np(int error);
+const char* strerrordesc_np(int error);
 
-const char* strerrorname_np(int);
-const char* strerrordesc_np(int);
 
 __END_DECLS
+
+#endif

libc/include/strings.h

@@ -0,0 +1,23 @@
+#ifndef _STRINGS_H
+#define _STRINGS_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/strings.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#include <bits/types/locale_t.h>
+
+#define __need_size_t
+#include <sys/types.h>
+
+int ffs(int i);
+int strcasecmp(const char* s1, const char* s2);
+int strcasecmp_l(const char* s1, const char* s2, locale_t locale);
+int strncasecmp(const char* s1, const char* s2, size_t n);
+int strncasecmp_l(const char* s1, const char* s2, size_t n, locale_t locale);
+
+__END_DECLS
+
+#endif

libc/include/sys/cdefs.h

@@ -1,11 +1,14 @@
-#pragma once
+#ifndef _SYS_CDEFS_H
+#define _SYS_CDEFS_H 1
 
 #define __banan_libc 1
 
 #ifdef __cplusplus
-#define __BEGIN_DECLS extern "C" {
+	#define __BEGIN_DECLS extern "C" {
-#define __END_DECLS }
+	#define __END_DECLS }
 #else
-#define __BEGIN_DECLS
+	#define __BEGIN_DECLS
-#define __END_DECLS
+	#define __END_DECLS
+#endif
+
 #endif

libc/include/sys/ipc.h

@@ -0,0 +1,37 @@
+#ifndef _SYS_IPC_H
+#define _SYS_IPC_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_ipc.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_uid_t
+#define __need_gid_t
+#define __need_mode_t
+#define __need_key_t
+#include <sys/types.h>
+
+struct ipc_perm
+{
+	uid_t	uid;	/* Owner's user ID. */
+	gid_t	gid;	/* Owner's group ID. */
+	uid_t	cuid;	/* Creator's user ID. */
+	gid_t	cgid;	/* Creator's group ID. */
+	mode_t	mode;	/* Read/write permission. */
+};
+
+#define IPC_CREAT	0x01
+#define IPC_EXCL	0x02
+#define IPC_NOWAIT	0x04
+#define IPC_PRIVATE	0x08
+#define IPC_RMID	0x10
+#define IPC_SET		0x20
+#define IPC_STAT	0x40
+
+key_t ftok(const char* path, int id);
+
+__END_DECLS
+
+#endif

libc/include/sys/mman.h

@@ -0,0 +1,65 @@
+#ifndef _SYS_MMAN_H
+#define _SYS_MMAN_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_mman.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define PROT_EXEC	0x01
+#define PROT_NONE	0x02
+#define PROT_READ	0x04
+#define PROT_WRITE	0x08
+
+#define MAP_FIXED	0x01
+#define MAP_PRIVATE	0x02
+#define MAP_SHARED	0x04
+
+#define MS_ASYNC		0x01
+#define MS_INVALIDATE	0x02
+#define MS_SYNC			0x04
+
+#define MCL_CURRENT	0x01
+#define MCL_FUTURE	0x01
+
+#define MAP_FAILED ((void*)0)
+
+#define POSIX_MADV_DONTNEED		1
+#define POSIX_MADV_NORMAL		2
+#define POSIX_MADV_RANDOM		3
+#define POSIX_MADV_SEQUENTIAL	4
+#define POSIX_MADV_WILLNEED		5
+
+#define POSIX_TYPED_MEM_ALLOCATE		0x01
+#define POSIX_TYPED_MEM_ALLOCATE_CONTIG	0x02
+#define POSIX_TYPED_MEM_MAP_ALLOCATABLE	0x04
+
+#define __need_mode_t
+#define __need_off_t
+#define __need_size_t
+#include <sys/types.h>
+
+struct posix_typed_mem_info
+{
+	size_t posix_tmi_length;	/* Maximum length which may be allocated from a typed memory object. */
+};
+
+int		mlock(const void* addr, size_t len);
+int		mlockall(int flags);
+void*	mmap(void* addr, size_t len, int prot, int flags, int fildes, off_t off);
+int		mprotect(void* addr, size_t len, int prot);
+int		msync(void* addr, size_t len, int flags);
+int		munlock(const void* addr, size_t len);
+int		munlockall(void);
+int		munmap(void* addr, size_t len);
+int		posix_madvise(void* addr, size_t len, int advice);
+int		posix_mem_offset(const void* __restrict addr, size_t len, off_t* __restrict off, size_t* __restrict contig_len, int* __restrict fildes);
+int		posix_typed_mem_get_info(int fildes, struct posix_typed_mem_info* info);
+int		posix_typed_mem_open(const char* name, int oflag, int tflag);
+int		shm_open(const char* name, int oflag, mode_t mode);
+int		shm_unlink(const char* name);
+
+__END_DECLS
+
+#endif

libc/include/sys/msg.h

@@ -0,0 +1,42 @@
+#ifndef _SYS_MSG_H
+#define _SYS_MSG_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_msg.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_pid_t
+#define __need_size_t
+#define __need_ssize_t
+#define __need_time_t
+#include <sys/types.h>
+
+#include <sys/ipc.h>
+
+typedef unsigned int msgqnum_t;
+typedef unsigned int msglen_t;
+
+#define MSG_NOERROR 0
+
+struct msqid_ds
+{
+	struct ipc_perm	msg_perm;	/* Operation permission structure. */
+	msgqnum_t		msg_qnum;	/* Number of messages currently on queue. */
+	msglen_t		msg_qbytes;	/* Maximum number of bytes allowed on queue. */
+	pid_t			msg_lspid;	/* Process ID of last msgsnd(). */
+	pid_t			msg_lrpid;	/* Process ID of last msgrcv(). */
+	time_t			msg_stime;	/* Time of last msgsnd(). */
+	time_t			msg_rtime;	/* Time of last msgrcv(). */
+	time_t			msg_ctime;	/* Time of last change. */
+};
+
+int			msgctl(int msqid, int cmd, struct msqid_ds* buf);
+int			msgget(key_t key, int msgflg);
+ssize_t		msgrcv(int msqid, void* msgp, size_t msgsz, long msgtyp, int msgflg);
+int			msgsnd(int msqid, const void* msgp, size_t msgsz, int msgflg);
+
+__END_DECLS
+
+#endif

libc/include/sys/param.h

@@ -1,4 +0,0 @@
-#pragma once
-
-#define MIN(a, b) ((a) < (b) ? (a) : (b))
-#define MAX(a, b) ((a) > (b) ? (a) : (b))

libc/include/sys/resource.h

@@ -0,0 +1,56 @@
+#ifndef _SYS_RESOURCE_H
+#define _SYS_RESOURCE_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_resource.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_id_t
+#include <sys/types.h>
+
+#include <sys/time.h>
+
+#define PRIO_PROCESS	0
+#define PRIO_PGRP		1
+#define PRIO_USER		2
+
+typedef unsigned int rlim_t;
+
+#define RLIM_INFINITY	((rlim_t)-1)
+#define RLIM_SAVED_MAX	RLIM_INFINITY
+#define RLIM_SAVED_CUR	RLIM_INFINITY
+
+#define RUSAGE_SELF		0
+#define RUSAGE_CHILDREN 1
+
+struct rlimit
+{
+	rlim_t rlim_cur;	/* The current (soft) limit. */
+	rlim_t rlim_max;	/* The hard limit. */
+};
+
+struct rusage
+{
+	struct timeval ru_utime;	/* User time used. */
+	struct timeval ru_stime;	/* System time used. */	
+};
+
+#define RLIMIT_CORE		0
+#define RLIMIT_CPU		1
+#define RLIMIT_DATA		2
+#define RLIMIT_FSIZE	3
+#define RLIMIT_NOFILE	4
+#define RLIMIT_STACK	5
+#define RLIMIT_AS		6
+
+int getpriority(int which, id_t who);
+int getrlimit(int resource, struct rlimit* rlp);
+int getrusage(int who, struct rusage* r_usage);
+int setpriority(int which, id_t who, int value);
+int setrlimit(int resource, const struct rlimit* rlp);
+
+__END_DECLS
+
+#endif

libc/include/sys/select.h

@@ -0,0 +1,58 @@
+#ifndef _SYS_SELECT_H
+#define _SYS_SELECT_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_select.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_time_t
+#define __need_suseconds_t
+#include <sys/types.h>
+
+#include <signal.h>
+#include <time.h>
+
+#define FD_SETSIZE 1024
+
+typedef unsigned long __fd_mask;
+#define __FD_MASK_SIZE (8 * sizeof(__fd_mask))
+
+typedef struct {
+	__fd_mask __bits[FD_SETSIZE / __FD_MASK_SIZE];
+} fd_set;
+
+#define FD_CLR(fd, setp) \
+	do { \ 
+		__fd_mask off = (fd) / __FD_MASK_SIZE; \
+		__fd_mask bit = (fd) % __FD_MASK_SIZE; \
+		(setp)->__bits[off] &= ~((__fd_mask)1 << bit); \
+	} while (0)
+
+#define FD_ISSET(fd, setp) \
+	({ \
+		__fd_mask off = (fd) / __FD_MASK_SIZE; \
+		__fd_mask bit = (fd) % __FD_MASK_SIZE; \
+		(setp)->__bits[off] & ((__fd_mask)1 << bit); \
+	})
+
+#define FD_SET(fd, setp) \
+	do { \ 
+		__fd_mask off = (fd) / __FD_MASK_SIZE; \
+		__fd_mask bit = (fd) % __FD_MASK_SIZE; \
+		(setp)->__bits[off] |= ((__fd_mask)1 << bit); \
+	} while (0)
+
+#define FD_ZERO(setp) \
+	do { \
+		for (int i = 0; i < FD_SETSIZE / __FD_MASK_SIZE; i++) \
+			(setp)->__bits[i] = (__fd_mask)0; \
+	} while (0)
+
+int pselect(int nfds, fd_set* __restrict readfds, fd_set* __restrict writefds, fd_set* __restrict errorfds, const struct timespec* __restrict timeout, const sigset_t* __restrict sigmask);
+int select(int nfds, fd_set* __restrict readfds, fd_set* __restrict writefds, fd_set* __restrict errorfds, struct timeval* __restrict timeout);
+
+__END_DECLS
+
+#endif

libc/include/sys/sem.h

@@ -0,0 +1,54 @@
+#ifndef _SYS_SEM_H
+#define _SYS_SEM_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_sem.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_pid_t
+#define __need_size_t
+#define __need_time_t
+#include <sys/types.h>
+
+#include <sys/ipc.h>
+
+#define SEM_UNDO 1
+
+#define GETNCNT	0
+#define GETPID	1
+#define GETVAL	2
+#define GETALL	3
+#define GETZCNT	4
+#define SETVAL	5
+#define SETALL	6
+
+struct semid_ds
+{
+	struct ipc_perm	sem_perm;	/* Operation permission structure. */
+	unsigned short	sem_nsems;	/* Number of semaphores in set. */
+	time_t			sem_otime;	/* Last semop() time. */
+	time_t			sem_ctime;	/* Last time changed by semctl(). */
+};
+
+// FIXME: A semaphore shall be represented by an anonymous structure, which shall include the following members:
+// unsigned short	semval;		/* Semaphore value. */
+// pid_t			sempid;		/* Process ID of last operation. */
+// unsigned short	semncnt;	/* Number of processes waiting for semval to become greater than current value. */
+// unsigned short	semzcnt;	/* Number of processes waiting for semval to become 0. */
+
+struct sembuf
+{
+	unsigned short	sem_num;	/* Semaphore number. */
+	short			sem_op;		/* Semaphore operation. */
+	short			sem_flg;	/* Operation flags. */
+};
+
+int   semctl(int, int, int, ...);
+int   semget(key_t, int, int);
+int   semop(int, struct sembuf *, size_t);
+
+__END_DECLS
+
+#endif

libc/include/sys/shm.h

@@ -0,0 +1,42 @@
+#ifndef _SYS_SHM_H
+#define _SYS_SHM_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_shm.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_pid_t
+#define __need_size_t
+#define __need_time_t
+#include <sys/types.h>
+
+#include <sys/ipc.h>
+
+#define SHM_RDONLY	0x01
+#define SHM_RDONLY	0x02
+#define SHM_RDONLY	0x04
+
+typedef unsigned int shmatt_t;
+
+struct shmid_ds
+{
+	struct ipc_perm	shm_perm;	/* Operation permission structure. */
+	size_t			shm_segsz;	/* Size of segment in bytes. */
+	pid_t			shm_lpid;	/* Process ID of last shared memory operation. */
+	pid_t			shm_cpid;	/* Process ID of creator. */
+	shmatt_t		shm_nattch;	/* Number of current attaches. */
+	time_t			shm_atime;	/* Time of last shmat(). */
+	time_t			shm_dtime;	/* Time of last shmdt(). */
+	time_t			shm_ctime;	/* Time of last change by shmctl().*/
+};
+
+void*	shmat(int shmid, const void* shmaddr, int shmflg);
+int		shmctl(int shmid, int cmd, struct shmid_ds* buf);
+int		shmdt(const void* shmaddr);
+int		shmget(key_t key, size_t size, int shmflg);
+
+__END_DECLS
+
+#endif

libc/include/sys/socket.h

@@ -0,0 +1,129 @@
+#ifndef _SYS_SOCKET_H
+#define _SYS_SOCKET_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_socket.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_size_t
+#define __need_ssize_t
+#include <sys/types.h>
+
+#include <sys/uio.h>
+
+#include <bits/types/sa_family_t.h>
+typedef long socklen_t;
+
+struct sockaddr
+{
+	sa_family_t	sa_family;	/* Address family. */
+	char		sa_data[];	/* Socket address (variable-length data). */
+};
+
+struct sockaddr_storage
+{
+	// FIXME
+	sa_family_t ss_family;
+};
+
+struct msghdr
+{
+	void*			msg_name;		/* Optional address. */
+	socklen_t		msg_namelen;	/* Size of address. */
+	struct iovec*	msg_iov;		/* Scatter/gather array. */
+	int				msg_iovlen;		/* Members in msg_iov. */
+	void*			msg_control;	/* Ancillary data; see below. */
+	socklen_t		msg_controllen;	/* Ancillary data buffer len. */
+	int				msg_flags;		/* Flags on received message. */
+};
+
+struct cmsghdr
+{
+	socklen_t	cmsg_len;	/* Data byte count, including the cmsghdr. */
+	int			cmsg_level;	/* Originating protocol. */
+	int			cmsg_type;	/* Protocol-specific type. */
+};
+
+// FIXME
+#if 0
+#define SCM_RIGHTS
+
+#define CMSG_DATA(cmsg)
+#define CMSG_NXTHDR(mhdr, cmsg)
+#define CMSG_FIRSTHDR(mhdr)
+#endif
+
+struct linger
+{
+	int l_onoff;	/* Indicates wheter linger option is enabled. */
+	int l_linger;	/* Linger time, in seconds. */
+};
+
+#define SOCK_DGRAM		0
+#define SOCK_RAW		1
+#define SOCK_SEQPACKET	2
+#define SOCK_STREAM		3
+
+#define SOL_SOCKET 1
+
+#define SO_ACCEPTCONN	0
+#define SO_BROADCAST	1
+#define SO_DEBUG		2
+#define SO_DONTROUTE	3
+#define SO_ERROR		4
+#define SO_KEEPALIVE	5
+#define SO_LINGER		6
+#define SO_OOBINLINE	7
+#define SO_RCVBUF		8
+#define SO_RCVLOWAT		9
+#define SO_RCVTIMEO		10
+#define SO_REUSEADDR	11
+#define SO_SNDBUF		12
+#define SO_SNDLOWAT		13
+#define SO_SNDTIMEO		14
+#define SO_TYPE			15
+
+#define SOMAXCONN 4096
+
+#define MSG_CTRUNC		0x01
+#define MSG_DONTROUTE	0x02
+#define MSG_EOR			0x04
+#define MSG_OOB			0x08
+#define MSG_NOSIGNAL	0x10
+#define MSG_PEEK		0x20
+#define MSG_TRUNC		0x40
+#define MSG_WAITALL		0x80
+
+#define AF_UNSPEC	0
+#define AF_INET		1
+#define AF_INET6	2
+#define AF_UNIX		3
+
+#define SHUT_RD		0x01
+#define SHUT_WR		0x02
+#define SHUT_RDWR	(SHUT_RD | SHUT_WR)
+
+int		accept(int socket, struct sockaddr* __restrict address, socklen_t* __restrict address_len);
+int		bind(int socket, const struct sockaddr* address, socklen_t address_len);
+int		connect(int socket, const struct sockaddr* address, socklen_t address_len);
+int		getpeername(int socket, struct sockaddr* __restrict address, socklen_t* __restrict address_len);
+int		getsockname(int socket, struct sockaddr* __restrict address, socklen_t* __restrict address_len);
+int		getsockopt(int socket, int level, int option_name, void* __restrict option_value, socklen_t* __restrict option_len);
+int		listen(int socket, int backlog);
+ssize_t	recv(int socket, void* buffer, size_t length, int flags);
+ssize_t	recvfrom(int socket, void* __restrict buffer, size_t length, int flags, struct sockaddr* __restrict address, socklen_t* __restrict address_len);
+ssize_t	recvmsg(int socket, struct msghdr* message, int flags);
+ssize_t	send(int socket, const void* buffer, size_t length, int flags);
+ssize_t	sendmsg(int socket, const struct msghdr* message, int flags);
+ssize_t	sendto(int socket, const void* message, size_t length, int flags, const struct sockaddr* dest_addr, socklen_t dest_len);
+int		setsockopt(int socket, int level, int option_name, const void* option_value, socklen_t option_len);
+int		shutdown(int socket, int how);
+int		sockatmark(int s);
+int		socket(int domain, int type, int protocol);
+int		socketpair(int domain, int type, int protocol, int socket_vector[2]);
+
+__END_DECLS
+
+#endif

libc/include/sys/stat.h

@@ -1,46 +1,108 @@
-#pragma once
+#ifndef _SYS_STAT_H
+#define _SYS_STAT_H 1
 
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_stat.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_blkcnt_t
+#define __need_blksize_t
+#define __need_dev_t
+#define __need_ino_t
+#define __need_mode_t
+#define __need_nlink_t
+#define __need_uid_t
+#define __need_gid_t
+#define __need_off_t
+#define __need_time_t 
 #include <sys/types.h>
+
 #include <time.h>
 
+struct stat
+{
+	dev_t			st_dev;		/* Device ID of device containing file. */
+	ino_t			st_ino;		/* File serial number. */
+	mode_t			st_mode;	/* Mode of file (see below). */
+	nlink_t			st_nlink;	/* Number of hard links to the file. */
+	uid_t			st_uid;		/* User ID of file. */
+	gid_t			st_gid;		/* Group ID of file. */
+	dev_t			st_rdev;	/* Device ID (if file is character or block special). */
+	off_t			st_size;	/* For regular files, the file size in bytes. For symbolic links, the length in bytes of the pathname contained in the symbolic link. For a shared memory object, the length in bytes. For a typed memory object, the length in bytes. For other file types, the use of this field is unspecified. */
+	struct timespec	st_atim;	/* Last data access timestamp. */
+	struct timespec	st_mtim;	/* Last data modification timestamp. */
+	struct timespec	st_ctim;	/* Last file status change timestamp. */
+	blksize_t		st_blksize;	/* A file system-specific preferred I/O block size for this object. In some file system types, this may vary from file to file. */
+	blkcnt_t		st_blocks;	/* Number of blocks allocated for this object. */
+};
+
 #define st_atime st_atim.tv_sec
 #define st_ctime st_ctim.tv_sec
 #define st_mtime st_mtim.tv_sec
 
-__BEGIN_DECLS
+#define S_IRWXU		((mode_t)00700)
+#define S_IRUSR		((mode_t)00400)
+#define S_IWUSR		((mode_t)00200)
+#define S_IXUSR		((mode_t)00100)
+#define S_IRWXG		((mode_t)00070)
+#define S_IRGRP		((mode_t)00040)
+#define S_IWGRP		((mode_t)00020)
+#define S_IXGRP		((mode_t)00010)
+#define S_IRWXO		((mode_t)00007)
+#define S_IROTH		((mode_t)00004)
+#define S_IWOTH		((mode_t)00002)
+#define S_IXOTH		((mode_t)00001)
+#define S_ISUID		((mode_t)04000)
+#define S_ISGID		((mode_t)02000)
+#define S_ISVTX		((mode_t)01000)
 
-struct stat
+#define S_IFIFO		((mode_t)0010000)
-{
+#define S_IFCHR		((mode_t)0020000)
-	dev_t st_dev;
+#define S_IFDIR		((mode_t)0040000)
-	ino_t st_ino;
+#define S_IFBLK		((mode_t)0060000)
-	mode_t st_mode;
+#define S_IFREG		((mode_t)0100000)
-	nlink_t st_nlink;
+#define S_IFLNK		((mode_t)0120000)
-	uid_t st_uid;
+#define S_IFSOCK	((mode_t)0140000)
-	gid_t st_gid;
-	dev_t st_rdev;
-	off_t st_size;
-	timespec st_atim;
-	timespec st_mtim;
-	timespec st_ctim;
-	blksize_t st_blksize;
-	blkcnt_t st_blocks;
-};
 
-int		chmod(const char*, mode_t);
+#define S_ISBLK(mode)	(mode & S_IFBLK)
-int		fchmod(int, mode_t);
+#define S_ISCHR(mode)	(mode & S_IFCHR)
-int		fchmodat(int, const char*, mode_t, int);
+#define S_ISDIR(mode)	(mode & S_IFDIR)
-int		fstat(int, struct stat*);
+#define S_ISFIFO(mode)	(mode & S_IFIFO)
-int		fstatat(int, const char*, struct stat*, int);
+#define S_ISREG(mode)	(mode & S_IFREG)
-int		futimens(int, const struct timespec[2]);
+#define S_ISLNK(mode)	(mode & S_IFLNK)
-int		lstat(const char*, struct stat*);
+#define S_ISSOCK(mode)	(mode & S_IFSOCK)
-int		mkdir(const char*, mode_t);
+
-int		mkdirat(int, const char*, mode_t);
+// FIXME
-int		mkfifo(const char*, mode_t);
+#if 0
-int		mkfifoat(int, const char*, mode_t);
+#define S_TYPEISMQ(buf)
-int		mknod(const char*, mode_t, dev_t);
+#define S_TYPEISSEM(buf)
-int		mknodat(int, const char*, mode_t, dev_t);
+#define S_TYPEISSHM(buf)
-int		stat(const char*, struct stat*);
+#define S_TYPEISTMO(buf)
-mode_t	umask(mode_t);
+#endif
-int		utimensat(int, const char*, const struct timespec[2], int);
+
+#define UTIME_NOW	1000000001
+#define UTIME_OMIT	1000000002
+
+
+int		chmod(const char* path, mode_t mode);
+int		fchmod(int fildes, mode_t mode);
+int		fchmodat(int fd, const char* path, mode_t mode, int flag);
+int		fstat(int fildes, struct stat* buf);
+int		fstatat(int fd, const char* __restrict path, struct stat* __restrict buf, int flag);
+int		futimens(int fd, const struct timespec times[2]);
+int		lstat(const char* __restrict path, struct stat* __restrict buf);
+int		mkdir(const char* path, mode_t mode);
+int		mkdirat(int fd, const char* path, mode_t mode);
+int		mkfifo(const char* path, mode_t mode);
+int		mkfifoat(int fd, const char* path, mode_t mode);
+int		mknod(const char* path, mode_t mode, dev_t dev);
+int		mknodat(int fd, const char* path, mode_t mode, dev_t dev);
+int		stat(const char* __restrict path, struct stat* __restrict buf);
+mode_t	umask(mode_t cmask);
+int		utimensat(int fd, const char* path, const struct timespec times[2], int flag);
 
 __END_DECLS
+
+#endif

libc/include/sys/statvfs.h

@@ -0,0 +1,37 @@
+#ifndef _SYS_STATVFS_H
+#define _SYS_STATVFS_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_statvfs.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_fsblkcnt_t
+#define __need_fsfilcnt_t
+#include <sys/types.h>
+
+struct statvfs
+{
+	unsigned long	f_bsize;	/* File system block size. */
+	unsigned long	f_frsize;	/* Fundamental file system block size. */
+	fsblkcnt_t		f_blocks;	/* Total number of blocks on file system in units of f_frsize. */
+	fsblkcnt_t		f_bfree;	/* Total number of free blocks. */
+	fsblkcnt_t		f_bavail;	/* Number of free blocks available to non-privileged process. */
+	fsfilcnt_t		f_files;	/* Total number of file serial numbers. */
+	fsfilcnt_t		f_ffree;	/* Total number of free file serial numbers. */
+	fsfilcnt_t		f_favail;	/* Number of file serial numbers available to non-privileged process. */
+	unsigned long	f_fsid;		/* File system ID. */
+	unsigned long	f_flag;		/* Bit mask of f_flag values. */
+	unsigned long	f_namemax;	/* Maximum filename length. */
+};
+
+#define ST_RDONLY 0x01
+#define ST_NOSUID 0x02
+
+int fstatvfs(int fildes, struct statvfs* buf);
+int statvfs(const char* __restrict path, struct statvfs* __restrict buf);
+
+__END_DECLS
+
+#endif

libc/include/sys/syscall.h

@@ -1,3 +1,23 @@
-#pragma once
+#ifndef _SYS_SYSCALL_H
+#define _SYS_SYSCALL_H 1
 
-#include <kernel/Syscall.h>
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define SYS_EXIT 1
+#define SYS_READ 2
+#define SYS_WRITE 3
+#define SYS_TERMID 4
+#define SYS_CLOSE 5
+#define SYS_OPEN 6
+#define SYS_ALLOC 7
+#define SYS_FREE 8
+#define SYS_SEEK 9
+#define SYS_TELL 10
+#define SYS_GET_TERMIOS 11
+#define SYS_SET_TERMIOS 12
+
+__END_DECLS
+
+#endif

libc/include/sys/sysmacros.h

@@ -1,8 +1,18 @@
-#pragma once
+#ifndef _SYS_SYSMACROS_H
+#define _SYS_SYSMACROS_H 1
 
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_pid_t
 #include <sys/types.h>
 
 #define makedev(maj, min) ((dev_t)(maj) << 32 | (dev_t)(min))
 
 #define major(dev) (((dev) >> 32) & 0xFFFFFFFF)
 #define minor(dev) ( (dev)        & 0xFFFFFFFF)
+
+__END_DECLS
+
+#endif

libc/include/sys/time.h

@@ -0,0 +1,40 @@
+#ifndef _SYS_TIME_H
+#define _SYS_TIME_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_time.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_time_t
+#define __need_suseconds_t
+#include <sys/types.h>
+
+#include <sys/select.h>
+
+struct timeval
+{
+	time_t		tv_sec;		/* Seconds. */
+	suseconds_t	tc_usec;	/* Microseconds. */
+};
+
+struct itimerval
+{
+	struct timeval it_interval;	/* Timer interval. */
+	struct timeval it_value;	/* Current value. */
+};
+
+#define ITIMER_REAL		0
+#define ITIMER_VIRTUAL	1
+#define ITIMER_PROF		2
+
+int getitimer(int which, struct itimerval* value);
+int gettimeofday(struct timeval* __restrict tp, void* __restrict tzp);
+int setitimer(int which, const struct itimerval* __restrict value, struct itimerval* __restrict ovalue);
+int select(int nfds, fd_set* __restrict readfds, fd_set* __restrict writefds, fd_set* __restrict errorfds, struct timeval* __restrict timeout);
+int utimes(const char* path, const struct timeval times[2]);
+
+__END_DECLS
+
+#endif

libc/include/sys/times.h

@@ -0,0 +1,25 @@
+#ifndef _SYS_TIMES_H
+#define _SYS_TIMES_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_times.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_clock_t
+#include <sys/types.h>
+
+struct tms
+{
+	clock_t tms_utime;	/* User CPU time. */
+	clock_t tms_stime;	/* System CPU time. */
+	clock_t tms_cutime;	/* User CPU time of terminated child processes. */
+	clock_t tms_cstime;	/* System CPU time of terminated child processes. */
+};
+
+clock_t times(struct tms* buffer);
+
+__END_DECLS
+
+#endif

libc/include/sys/types.h

@@ -1,26 +1,196 @@
-#pragma once
+#ifndef _SYS_TYPES_H
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_types.h.html
 
-#include <stddef.h>
-#include <stdint.h>
 #include <sys/cdefs.h>
 
 __BEGIN_DECLS
 
-typedef int32_t		blkcnt_t;
+#if    !defined(__need_blkcnt_t) \
-typedef int32_t		blksize_t;
+	&& !defined(__need_blksize_t) \
-typedef uint64_t	clock_t;
+	&& !defined(__need_clock_t) \
-typedef int32_t		clockid_t;
+	&& !defined(__need_clockid_t) \
-typedef uint64_t	dev_t;
+	&& !defined(__need_dev_t) \
-typedef uint32_t	ino_t;
+	&& !defined(__need_fsblkcnt_t) \
-typedef uint16_t	mode_t;
+	&& !defined(__need_fsfilcnt_t) \
-typedef uint32_t	nlink_t;
+	&& !defined(__need_gid_t) \
-typedef int64_t		off_t;
+	&& !defined(__need_id_t) \
-typedef uint64_t	time_t;
+	&& !defined(__need_ino_t) \
-typedef uint64_t	timer_t;
+	&& !defined(__need_key_t) \
-typedef int32_t		id_t;
+	&& !defined(__need_mode_t) \
-typedef id_t		pid_t;
+	&& !defined(__need_nlink_t) \
-typedef id_t		uid_t;
+	&& !defined(__need_off_t) \
-typedef id_t		gid_t;
+	&& !defined(__need_pid_t) \
-typedef int64_t		ssize_t;
+	&& !defined(__need_pthread_attr_t) \
+	&& !defined(__need_pthread_barrier_t) \
+	&& !defined(__need_pthread_barrierattr_t) \
+	&& !defined(__need_pthread_cond_t) \
+	&& !defined(__need_pthread_condattr_t) \
+	&& !defined(__need_pthread_key_t) \
+	&& !defined(__need_pthread_mutex_t) \
+	&& !defined(__need_pthread_mutexattr_t) \
+	&& !defined(__need_pthread_once_t) \
+	&& !defined(__need_pthread_rwlock_t) \
+	&& !defined(__need_pthread_rwlockattr_t) \
+	&& !defined(__need_pthread_spinlock_t) \
+	&& !defined(__need_pthread_t) \
+	&& !defined(__need_size_t) \
+	&& !defined(__need_ssize_t) \
+	&& !defined(__need_suseconds_t) \
+	&& !defined(__need_time_t) \
+	&& !defined(__need_timer_t) \
+	&& !defined(__need_uid_t)
+
+	#define __need_all_types
+#endif
+
+#ifdef __need_all_types
+#define _SYS_TYPES_H 1
+#endif
+
+#if !defined(__blkcnt_t_defined) && (defined(__need_all_types) || defined(__need_blkcnt_t))
+	#define __blkcnt_defined 1
+	typedef long blkcnt_t;
+#endif
+#undef __need_blkcnt_t
+
+#if !defined(__blksize_t_defined) && (defined(__need_all_types) || defined(__need_blksize_t))
+	#define __blksize_t_defined 1
+	typedef long blksize_t;
+#endif
+#undef __need_blksize_t
+
+#if !defined(__clock_t_defined) && (defined(__need_all_types) || defined(__need_clock_t))
+	#define __clock_t_defined 1
+	typedef long clock_t;
+#endif
+#undef __need_clock_t
+
+#if !defined(__clockid_t_defined) && (defined(__need_all_types) || defined(__need_clockid_t))
+	#define __clockid_t_defined 1
+	typedef int clockid_t;
+#endif
+#undef __need_clockid_t
+
+#if !defined(__dev_t_defined) && (defined(__need_all_types) || defined(__need_dev_t))
+	#define __dev_t_defined 1
+	typedef unsigned long dev_t;
+#endif
+#undef __need_dev_t
+
+#if !defined(__fsblkcnt_t_defined) && (defined(__need_all_types) || defined(__need_fsblkcnt_t))
+	#define __fsblkcnt_t_defined 1
+	typedef unsigned long fsblkcnt_t;
+#endif
+#undef __need_fsblkcnt_t
+
+#if !defined(__fsfilcnt_t_defined) && (defined(__need_all_types) || defined(__need_fsfilcnt_t))
+	#define __fsfilcnt_t_defined 1
+	typedef unsigned long fsfilcnt_t;
+#endif
+#undef __need_fsfilcnt_t
+
+#if !defined(__gid_t_defined) && (defined(__need_all_types) || defined(__need_gid_t))
+	#define __gid_t_defined 1
+	typedef unsigned int gid_t;
+#endif
+#undef __need_gid_t
+
+#if !defined(__id_t_defined) && (defined(__need_all_types) || defined(__need_id_t))
+	#define __id_t_defined 1
+	typedef unsigned int id_t;
+#endif
+#undef __need_id_t
+
+#if !defined(__ino_t_defined) && (defined(__need_all_types) || defined(__need_ino_t))
+	#define __ino_t_defined 1
+	typedef unsigned long ino_t;
+#endif
+#undef __need_ino_t
+
+#if !defined(__key_t_defined) && (defined(__need_all_types) || defined(__need_key_t))
+	#define __key_t_defined 1
+	typedef int key_t;
+#endif
+#undef __need_key_t
+
+#if !defined(__mode_t_defined) && (defined(__need_all_types) || defined(__need_mode_t))
+	#define __mode_t_defined 1
+	typedef unsigned int mode_t;
+#endif
+#undef __need_mode_t
+
+#if !defined(__nlink_t_defined) && (defined(__need_all_types) || defined(__need_nlink_t))
+	#define __nlink_t_defined 1
+	typedef unsigned long nlink_t;
+#endif
+#undef __need_nlink_t
+
+#if !defined(__off_t_defined) && (defined(__need_all_types) || defined(__need_off_t))
+	#define __off_t_defined 1
+	typedef long off_t;
+#endif
+#undef __need_off_t
+
+#if !defined(__pid_t_defined) && (defined(__need_all_types) || defined(__need_pid_t))
+	#define __pid_t_defined 1
+	typedef int pid_t;
+#endif
+#undef __need_pid_t
+
+#include <bits/pthread_types.h>
+
+#if !defined(__size_t_defined) && (defined(__need_all_types) || defined(__need_size_t))
+	#define __size_t_defined 1
+	#define __need_size_t
+	#include <stddef.h>
+#endif
+#undef __need_size_t
+
+#if !defined(__ssize_t_defined) && (defined(__need_all_types) || defined(__need_ssize_t))
+	#define __ssize_t_defined 1
+	#if __SIZEOF_SIZE_T__ == __SIZEOF_INT__
+		typedef int ssize_t;
+	#elif __SIZEOF_SIZE_T__ == __SIZEOF_LONG__
+		typedef long ssize_t;
+	#elif __SIZEOF_SIZE_T__ == __SIZEOF_LONG_LONG__
+		typedef long long ssize_t;
+	#else
+		#error "unsupported sizeof(size_t)"
+	#endif
+#endif
+#undef __need_ssize_t
+
+#if !defined(__suseconds_t_defined) && (defined(__need_all_types) || defined(__need_suseconds_t))
+	#define __suseconds_t_defined 1
+	typedef long suseconds_t;
+#endif
+#undef __need_suseconds_t
+
+#if !defined(__time_t_defined) && (defined(__need_all_types) || defined(__need_time_t))
+	#define __time_t_defined 1
+	typedef unsigned long long time_t;
+#endif
+#undef __need_time_t
+
+#if !defined(__timer_t_defined) && (defined(__need_all_types) || defined(__need_timer_t))
+	#define __timer_t_defined 1
+	typedef void* timer_t;
+#endif
+#undef __need_timer_t
+
+#if !defined(__uid_t_defined) && (defined(__need_all_types) || defined(__need_uid_t))
+	#define __uid_t_defined 1
+	typedef int uid_t;
+#endif
+#undef __need_uid_t
+
+#ifdef __need_all_types
+	#include <stdint.h>
+#endif
+
+#undef __need_all_types
 
 __END_DECLS
+
+#endif

libc/include/sys/uio.h

@@ -0,0 +1,25 @@
+#ifndef _SYS_UIO_H
+#define _SYS_UIO_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_uio.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_size_t
+#define __need_ssize_t
+#include <sys/types.h>
+
+struct iovec
+{
+	void*	iov_base;	/* Base address of a memory region for input or output. */
+	size_t	iov_len;	/* The size of the memory pointed to by iov_base. */
+};
+
+ssize_t readv(int fildes, const struct iovec* iov, int iovcnt);
+ssize_t writev(int fildes, const struct iovec* iov, int iovcnt);
+
+__END_DECLS
+
+#endif

libc/include/sys/un.h

@@ -0,0 +1,20 @@
+#ifndef _SYS_UN_H
+#define _SYS_UN_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_un.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#include <bits/types/sa_family_t.h>
+
+struct sockaddr_un
+{
+	sa_family_t	sun_family;	/* Address family. */
+	char		sun_path[];	/* Socket pathname. */
+};
+
+__END_DECLS
+
+#endif

libc/include/sys/utsname.h

@@ -0,0 +1,23 @@
+#ifndef _SYS_UTSNAME_H
+#define _SYS_UTSNAME_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_utsname.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+struct utsname
+{
+	char sysname[65];	/* Name of this implementation of the operating system. */
+	char nodename[65];	/* Name of this node within the communications network to which this node is attached, if any. */
+	char release[65];	/* Current release level of this implementation. */
+	char version[65];	/* Current version level of this release. */
+	char machine[65];	/* Name of the hardware type on which the system is running. */
+};
+
+int uname(struct utsname* name);
+
+__END_DECLS
+
+#endif

libc/include/sys/wait.h

@@ -0,0 +1,47 @@
+#ifndef _SYS_WAIT_H
+#define _SYS_WAIT_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_wait.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_id_t
+#define __need_pid_t
+#include <sys/types.h>
+
+#include <signal.h>
+
+#define WCONTINUED	0x01
+#define WNOHANG		0x02
+#define WUNTRACED	0x04
+#define WEXITED		0x08
+#define WNOWAIT		0x10
+#define WSTOPPED	0x20
+
+// FIXME
+#if 0
+#define WEXITSTATUS
+#define WIFCONTINUED
+#define WIFEXITED
+#define WIFSIGNALED
+#define WIFSTOPPED
+#define WSTOPSIG
+#define WTERMSIG
+#endif
+
+typedef enum
+{
+	P_ALL,
+	P_PGID,
+	P_PID,
+} idtype_t;
+
+pid_t	wait(int* stat_loc);
+int		waitid(idtype_t idtype, id_t id, siginfo_t* infop, int options);
+pid_t	waitpid(pid_t pid, int* stat_loc, int options);
+
+__END_DECLS
+
+#endif

libc/include/syslog.h

@@ -0,0 +1,52 @@
+#ifndef _SYSLOG_H
+#define _SYSLOG_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/syslog.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define LOG_PID		0x01
+#define LOG_CONS	0x02
+#define LOG_NDELAY	0x04
+#define LOG_ODELAY	0x08
+#define LOG_NOWAIT	0x10
+
+#define	LOG_EMERG	0
+#define	LOG_ALERT	1
+#define	LOG_CRIT	2
+#define	LOG_ERR		3
+#define	LOG_WARNING	4
+#define	LOG_NOTICE	5
+#define	LOG_INFO	6
+#define	LOG_DEBUG	7
+
+#define LOG_KERN	( 0 << 3)
+#define LOG_USER	( 1 << 3)
+#define LOG_MAIL	( 2 << 3)
+#define LOG_NEWS	( 3 << 3)
+#define LOG_UUCP	( 4 << 3)
+#define LOG_DAEMON	( 5 << 3)
+#define LOG_AUTH	( 6 << 3)
+#define LOG_CRON	( 7 << 3)
+#define LOG_LPR		( 8 << 3)
+#define LOG_LOCAL0	( 9 << 3)
+#define LOG_LOCAL1	(10 << 3)
+#define LOG_LOCAL2	(11 << 3)
+#define LOG_LOCAL3	(12 << 3)
+#define LOG_LOCAL4	(13 << 3)
+#define LOG_LOCAL5	(14 << 3)
+#define LOG_LOCAL6	(15 << 3)
+#define LOG_LOCAL7	(16 << 3)
+
+#define LOG_MASK(pri) (1 << (pri))
+
+void	closelog(void);
+void	openlog(const char* ident, int logopt, int facility);
+int		setlogmask(int maskpri);
+void	syslog(int priority, const char* message, ...);
+
+__END_DECLS
+
+#endif

libc/include/tar.h

@@ -0,0 +1,40 @@
+#ifndef _TAR_H
+#define _TAR_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/tar.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define TMAGIC		"ustar"
+#define TMAGLEN		6
+#define TVERSION	"00"
+#define TVERSLEN	2
+
+#define REGTYPE		'0'
+#define AREGTYPE	'\0'
+#define LNKTYPE		'1'
+#define SYMTYPE		'2'
+#define CHRTYPE		'3'
+#define BLKTYPE		'4'
+#define DIRTYPE		'5'
+#define FIFOTYPE	'6'
+#define CONTTYPE	'7'
+
+#define TSUID	04000
+#define TSGID	02000
+#define TSVTX	01000
+#define TUREAD	00400
+#define TUWRITE	00200
+#define TUEXEC	00100
+#define TGREAD	00040
+#define TGWRITE	00020
+#define TGEXEC	00010
+#define TOREAD	00004
+#define TOWRITE	00002
+#define TOEXEC	00001
+
+__END_DECLS
+
+#endif

libc/include/termios.h

@@ -1,11 +1,42 @@
-#pragma once
+#ifndef _TERMIOS_H
+#define _TERMIOS_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/termios.h.html
 
 #include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_pid_t
 #include <sys/types.h>
 
-#define NCCS 0
+typedef unsigned int cc_t;
+typedef unsigned int speed_t;
+typedef unsigned int tcflag_t;
+
+#define VEOF	0
+#define VEOL	1
+#define VERASE	2
+#define VINTR	3
+#define VKILL	4
+#define VMIN	5
+#define VQUIT	6
+#define VSTART	7
+#define VSTOP	8
+#define VSUSP	9
+#define VTIME	10
+
+#define NCCS	11
+
+struct termios
+{
+	tcflag_t	c_iflag;	/* Input modes. */
+	tcflag_t	c_oflag;	/* Output modes. */
+	tcflag_t	c_cflag;	/* Control modes. */
+	tcflag_t	c_lflag;	/* Local modes. */
+	cc_t		c_cc[NCCS];	/* Control characters. */
+};
 
-// c_iflag
 #define BRKINT	0x001
 #define ICRNL	0x002
 #define IGNBRK	0x004
@@ -19,7 +50,6 @@
 #define IXON	0x400
 #define PARMRK	0x800
 
-// c_oflag
 #define OPOST		0x0001
 #define ONLCR		0x0002
 #define OCRNL		0x0004
@@ -28,42 +58,57 @@
 #define OFDEL		0x0020
 #define OFILL		0x0040
 #define NLDLY		0x0080
-	#define NL0 0
+	#define NL0		0x0000
-	#define NL1 1
+	#define NL1		0x0080
-#define CRDLY	0x0100
+#define CRDLY		0x0300
-	#define CR0 0
+	#define CR0		0x0000
-	#define CR1 1
+	#define CR1		0x0100
-	#define CR2 2
+	#define CR2		0x0200
-	#define CR3 3
+	#define CR3		0x0300
-#define TABDLY	0x0200
+#define TABDLY		0x0C00
-	#define TAB0 0
+	#define TAB0	0x0000
-	#define TAB1 1
+	#define TAB1	0x0400
-	#define TAB2 2
+	#define TAB2	0x0800
-	#define TAB3 3
+	#define TAB3	0x0C00
-#define BSDLY	0x0400
+#define BSDLY		0x1000
-	#define BS0 0
+	#define BS0		0x0000
-	#define BS1 1
+	#define BS1		0x1000
-#define VTDLY	0x0800
+#define VTDLY		0x2000
-	#define VT0 0
+	#define VT0		0x0000
-	#define VT1 1
+	#define VT1		0x2000
-#define FFDLY	0x1000
+#define FFDLY		0x4000
-	#define FF0 0
+	#define FF0		0x0000
-	#define FF1 1
+	#define FF1		0x4000
 
-// c_cflag
+#define B0		0
-#define CSIZE	0x01
+#define B50		1
-	#define CS5 5
+#define B75		2
-	#define CS6 6
+#define B110	3
-	#define CS7 7
+#define B134	4
-	#define CS8 8
+#define B150	5
-#define CSTOPB	0x02
+#define B200	6
-#define CREAD	0x04
+#define B300	7
-#define PARENB	0x08
+#define B600	8
-#define PARODD	0x10
+#define B1200	9
-#define HUPCL	0x20
+#define B1800	10
-#define CLOCAL	0x40
+#define B2400	11
+#define B4800	12
+#define B9600	13
+#define B19200	14
+#define B38400	15
+
+#define CSIZE	0x03
+	#define CS5 0x00
+	#define CS6 0x01
+	#define CS7 0x02
+	#define CS8 0x03
+#define CSTOPB	0x04
+#define CREAD	0x08
+#define PARENB	0x10
+#define PARODD	0x20
+#define HUPCL	0x40
+#define CLOCAL	0x80
 
-// c_lflag
 #define ECHO	0x001
 #define ECHOE	0x002
 #define ECHOK	0x004
@@ -74,47 +119,31 @@
 #define NOFLSH	0x080
 #define TOSTOP	0x100
 
-// for tcsetattr
+#define TCSANOW		0
-#define TCSANOW		1
+#define TCSADRAIN	1
-#define TCSADRAIN	2
+#define TCSAFLUSH	2
-#define TCSAFLUSH	3
 
-// for tcflush
 #define TCIFLUSH	0x01
-#define TCIOFLUSH	(TCIFLUSH | TCOFLUSH)
 #define TCOFLUSH	0x02
+#define TCIOFLUSH	(TCIFLUSH | TCOFLUSH)
 
-// for tcflow
+#define TCIOFF	0
-#define TCIOFF	1
+#define TCION	1
-#define TCION	2
+#define TCOOFF	2
-#define TCOOFF	3
+#define TCOON	3
-#define TCOON	4
 
-__BEGIN_DECLS
+speed_t	cfgetispeed(const struct termios* termios_p);
-
+speed_t	cfgetospeed(const struct termios* termios_p);
-typedef int cc_t;
+int		cfsetispeed(struct termios* termios_p, speed_t speed);
-typedef int speed_t;
+int		cfsetospeed(struct termios* termios_p, speed_t speed);
-typedef int tcflag_t;
+int		tcdrain(int fildes);
-
+int		tcflow(int fildes, int action);
-struct termios
+int		tcflush(int fildes, int queue_selector);
-{
+int		tcgetattr(int fildes, struct termios* termios_p);
-	tcflag_t c_iflag;
+pid_t	tcgetsid(int fildes);
-	tcflag_t c_oflag;
+int		tcsendbreak(int fildes, int duration);
-	tcflag_t c_cflag;
+int		tcsetattr(int fildes, int optional_actions, const struct termios* termios_p);
-	tcflag_t c_lflag;
-	cc_t c_cc[NCCS];
-};
-
-speed_t cfgetispeed(const struct termios*);
-speed_t cfgetospeed(const struct termios*);
-int		cfsetispeed(struct termios*, speed_t);
-int		cfsetospeed(struct termios*, speed_t);
-int		tcdrain(int);
-int		tcflow(int, int);
-int		tcflush(int, int);
-int		tcgetattr(int, struct termios*);
-pid_t	tcgetsid(int);
-int		tcsendbreak(int, int);
-int		tcsetattr(int, int, const struct termios*);
 
 __END_DECLS
+
+#endif

libc/include/tgmath.h

@@ -0,0 +1,17 @@
+#ifndef _TGMATH_H
+#define _TGMATH_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/tgmath.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#include <math.h>
+#include <complex.h>
+
+// FIXME
+
+__END_DECLS
+
+#endif

libc/include/time.h

@@ -1,56 +1,97 @@
-#pragma once
+#ifndef _TIME_H
+#define _TIME_H 1
 
-#include <locale.h>
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/time.h.html
-#include <sys/types.h>
+
+#include <sys/cdefs.h>
 
 __BEGIN_DECLS
 
+#define __need_clock_t
+#define __need_size_t
+#define __need_time_t
+#define __need_clockid_t
+#define __need_timer_t
+#define __need_pid_t
+#include <sys/types.h>
+
+#define __need_NULL
+#include <stddef.h>
+
+#include <bits/types/locale_t.h>
+
+#include <signal.h>
+
 struct tm
 {
-	int tm_sec;
+	int tm_sec;		/* Seconds [0,60]. */
-	int tm_min;
+	int tm_min;		/* Minutes [0,59]. */
-	int tm_hour;
+	int tm_hour;	/* Hour [0,23]. */
-	int tm_mday;
+	int tm_mday;	/* Day of month [1,31]. */
-	int tm_mon;
+	int tm_mon;		/* Month of year [0,11]. */
-	int tm_year;
+	int tm_year;	/* Years since 1900. */
-	int tm_wday;
+	int tm_wday;	/* Day of week [0,6] (Sunday =0). */
-	int tm_yday;
+	int tm_yday;	/* Day of year [0,365]. */
-	int tm_isdst;
+	int tm_isdst;	/* Daylight Savings flag. */
 };
 
 struct timespec
 {
-	time_t tv_sec;
+	time_t	tv_sec;		/* Seconds. */
-	long tv_nsec;
+	long	tv_nsec;	/* Nanoseconds. */
 };
 
-char*		asctime(const struct tm*);
+struct itimerspec
-char*		asctime_r(const struct tm*, char*);
+{
+	struct timespec it_interval;	/* Timer period. */
+	struct timespec it_value;		/* Timer expiration. */
+};
+
+#define CLOCKS_PER_SEC ((clock_t)1000000)
+
+#define CLOCK_MONOTONIC				0
+#define CLOCK_PROCESS_CPUTIME_ID	1
+#define CLOCK_REALTIME				2
+#define CLOCK_THREAD_CPUTIME_ID		3
+
+#define TIMER_ABSTIME 1
+
+// FIXME
+// #define getdate_err(int)
+
+char*		asctime(const struct tm* timeptr);
+char*		asctime_r(const struct tm* __restrict tm, char* __restrict buf);
 clock_t		clock(void);
-int			clock_getcpuclockid(pid_t, clockid_t*);
+int			clock_getcpuclockid(pid_t pid, clockid_t* clock_id);
-int			clock_getres(clockid_t, struct timespe*);
+int			clock_getres(clockid_t clock_id, struct timespec* res);
-int			clock_gettime(clockid_t, struct timespec*);
+int			clock_gettime(clockid_t clock_id, struct timespec* tp);
-int			clock_nanosleep(clockid_t, int, const struct timespec*, struct timespec*);
+int			clock_nanosleep(clockid_t clock_id, int flags, const struct timespec* rqtp, struct timespec* rmtp);
-int			clock_settime(clockid_t, const struct timespec*);
+int			clock_settime(clockid_t clock_id, const struct timespec* tp);
-char*		ctime(const time_t*);
+char*		ctime(const time_t* clock);
-char*		ctime_r(const time_t*, char*);
+char*		ctime_r(const time_t* clock, char* buf);
-double		difftime(time_t, time_t);
+double		difftime(time_t time1, time_t time0);
-struct tm*	getdate(const char*);
+struct tm*	getdate(const char* string);
-struct tm*	gmtime(const time_t*);
+struct tm*	gmtime(const time_t* timer);
-struct tm*	gmtime_r(const time_t*, struct tm*);
+struct tm*	gmtime_r(const time_t* __restrict timer, struct tm* __restrict result);
-struct tm*	localtime(const time_t*);
+struct tm*	localtime(const time_t* timer);
-struct tm*	localtime_r(const time_t*, struct tm*);
+struct tm*	localtime_r(const time_t* __restrict timer, struct tm* __restrict result);
-time_t		mktime(struct tm*);
+time_t		mktime(struct tm* timeptr);
-int			nanosleep(const struct timespec*, struct timespec*);
+int			nanosleep(const struct timespec* rqtp, struct timespec* rmtp);
-size_t		strftime(char*, size_t, const char*, const struct tm*);
+size_t		strftime(char* __restrict s, size_t maxsize, const char* __restrict format, const struct tm* __restrict timeptr);
-size_t		strftime_l(char*, size_t, const char*, const struct tm*, locale_t);
+size_t		strftime_l(char* __restrict s, size_t maxsize, const char* __restrict format, const struct tm* __restrict timeptr, locale_t locale);
-char		*strptime(const char*, const char*, struct tm*);
+char*		strptime(const char* __restrict buf, const char* __restrict format, struct tm* __restrict tm);
-time_t		time(time_t*);
+time_t		time(time_t* tloc);
-int			timer_create(clockid_t, struct sigevent*, timer_t*);
+int			timer_create(clockid_t clockid, struct sigevent* __restrict evp, timer_t* __restrict timerid);
-int			timer_delete(timer_t);
+int			timer_delete(timer_t timerid);
-int			timer_getoverrun(timer_t);
+int			timer_getoverrun(timer_t timerid);
-int			timer_gettime(timer_t, struct itimerspec*);
+int			timer_gettime(timer_t timerid, struct itimerspec* value);
-int			timer_settime(timer_t, int, const struct itimerspec*, struct itimerspec*);
+int			timer_settime(timer_t timerid, int, const struct itimerspec* __restrict value, struct itimerspec* __restrict ovalue);
 void		tzset(void);
 
+extern int		daylight;
+extern long		timezone;
+extern char*	tzname[];
+
 __END_DECLS
+
+#endif

libc/include/ulimit.h

@@ -0,0 +1,17 @@
+#ifndef _ULIMIT_H
+#define _ULIMIT_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/ulimit.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define UL_GETFSIZE 0
+#define UL_SETFSIZE 1
+
+long ulimit(int, ...);
+
+__END_DECLS
+
+#endif

libc/include/unistd.h

@@ -1,96 +1,216 @@
-#pragma once
+#ifndef _UNISTD_H
+#define _UNISTD_H 1
 
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/unistd.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define _POSIX_VERSION 200809L
+#define _POSIX2_VERSION -1
+#define _XOPEN_VERSION 700
+
+#define _POSIX_ADVISORY_INFO -1
+#define _POSIX_ASYNCHRONOUS_IO -1
+#define _POSIX_BARRIERS -1
+#define _POSIX_CHOWN_RESTRICTED -1
+#define _POSIX_CLOCK_SELECTION -1
+#define _POSIX_CPUTIME -1
+#define _POSIX_FSYNC -1
+#define _POSIX_IPV6 -1
+#define _POSIX_JOB_CONTROL -1
+#define _POSIX_MAPPED_FILES -1
+#define _POSIX_MEMLOCK -1
+#define _POSIX_MEMLOCK_RANGE -1
+#define _POSIX_MEMORY_PROTECTION -1
+#define _POSIX_MESSAGE_PASSING -1
+#define _POSIX_MONOTONIC_CLOCK -1
+#define _POSIX_NO_TRUNC -1
+#define _POSIX_PRIORITIZED_IO -1
+#define _POSIX_PRIORITY_SCHEDULING -1
+#define _POSIX_RAW_SOCKETS -1
+#define _POSIX_READER_WRITER_LOCKS -1
+#define _POSIX_REALTIME_SIGNALS -1
+#define _POSIX_REGEXP -1
+#define _POSIX_SAVED_IDS -1
+#define _POSIX_SEMAPHORES -1
+#define _POSIX_SHARED_MEMORY_OBJECTS -1
+#define _POSIX_SHELL -1
+#define _POSIX_SPAWN -1
+#define _POSIX_SPIN_LOCKS -1
+#define _POSIX_SPORADIC_SERVER -1
+#define _POSIX_SYNCHRONIZED_IO xx
+#define _POSIX_THREAD_ATTR_STACKADDR -1 
+#define _POSIX_THREAD_ATTR_STACKSIZE -1
+#define _POSIX_THREAD_CPUTIME -1
+#define _POSIX_THREAD_PRIO_INHERIT -1
+#define _POSIX_THREAD_PRIO_PROTECT -1
+#define _POSIX_THREAD_PRIORITY_SCHEDULING -1
+#define _POSIX_THREAD_PROCESS_SHARED -1
+#define _POSIX_THREAD_ROBUST_PRIO_INHERIT -1
+#define _POSIX_THREAD_ROBUST_PRIO_PROTECT -1
+#define _POSIX_THREAD_SAFE_FUNCTIONS -1
+#define _POSIX_THREAD_SPORADIC_SERVER -1
+#define _POSIX_THREADS -1
+#define _POSIX_TIMEOUTS -1
+#define _POSIX_TIMERS -1
+#define _POSIX_TRACE -1
+#define _POSIX_TRACE_EVENT_FILTER -1
+#define _POSIX_TRACE_INHERIT -1
+#define _POSIX_TRACE_LOG -1
+#define _POSIX_TYPED_MEMORY_OBJECTS -1
+#define _POSIX_V6_ILP32_OFF32 -1
+#define _POSIX_V6_ILP32_OFFBIG -1
+#define _POSIX_V6_LP64_OFF64 -1
+#define _POSIX_V6_LPBIG_OFFBIG -1
+#define _POSIX_V7_ILP32_OFF32 -1
+#define _POSIX_V7_ILP32_OFFBIG -1
+#define _POSIX_V7_LP64_OFF64 -1
+#define _POSIX_V7_LPBIG_OFFBIG -1
+#define _POSIX2_C_BIND -1
+#define _POSIX2_C_DEV -1
+#define _POSIX2_CHAR_TERM -1
+#define _POSIX2_FORT_DEV -1
+#define _POSIX2_FORT_RUN -1
+#define _POSIX2_LOCALEDEF -1
+#define _POSIX2_PBS -1
+#define _POSIX2_PBS_ACCOUNTING -1
+#define _POSIX2_PBS_CHECKPOINT -1
+#define _POSIX2_PBS_LOCATE -1
+#define _POSIX2_PBS_MESSAGE -1
+#define _POSIX2_PBS_TRACK -1
+#define _POSIX2_SW_DEV -1
+#define _POSIX2_UPE -1
+#define _XOPEN_CRYPT -1
+#define _XOPEN_ENH_I18N -1
+#define _XOPEN_REALTIME -1
+#define _XOPEN_REALTIME_THREADS -1
+#define _XOPEN_SHM -1
+#define _XOPEN_STREAMS -1
+#define _XOPEN_UNIX -1
+#define _XOPEN_UUCP -1
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#define __need_size_t
+#define __need_ssize_t
+#define __need_uid_t
+#define __need_gid_t
+#define __need_off_t
+#define __need_pid_t
 #include <sys/types.h>
 
+// FIXME: _CS prefixed definitions
+
+// FIXME: _PC prefixed definitions
+
+#define F_OK 0x01
+#define R_OK 0x02
+#define W_OK 0x04
+#define X_OK 0x08
+
+#define F_LOCK	0
+#define F_TEST	1
+#define F_TLOCK	2
+#define F_ULOCK	3
+
 #define STDIN_FILENO 0
 #define STDOUT_FILENO 1
 #define STDERR_FILENO 2
 
-__BEGIN_DECLS
+#define _POSIX_VDISABLE 0
 
-int			access(const char*, int);
+int					access(const char* path, int amode);
-unsigned	alarm(unsigned);
+unsigned			alarm(unsigned seconds);
-int			chdir(const char*);
+int					chdir(const char* path);
-int			chown(const char*, uid_t, gid_t);
+int					chown(const char* path, uid_t owner, gid_t group);
-int			close(int);
+int					close(int fildes);
-size_t		confstr(int, char*, size_t);
+size_t				confstr(int name, char* buf, size_t len);
-char*		crypt(const char*, const char*);
+char*				crypt(const char* key, const char* salt);
-int			dup(int);
+int					dup(int fildes);
-int			dup2(int, int);
+int					dup2(int fildes, int fildes2);
-void		_exit(int);
+[[noreturn]] void	_exit(int status);
-void		encrypt(char[64], int);
+void				encrypt(char block[64], int edflag);
-int			execl(const char*, const char*, ...);
+int					execl(const char* path, const char* arg0, ...);
-int			execle(const char*, const char*, ...);
+int					execle(const char* path, const char* arg0, ...);
-int			execlp(const char*, const char*, ...);
+int					execlp(const char* file, const char* arg0, ...);
-int			execv(const char*, char* const[]);
+int					execv(const char* path, char* const argv[]);
-int			execve(const char*, char* const[], char* const[]);
+int					execve(const char* path, char* const argv[], char* const envp[]);
-int			execvp(const char*, char* const[]);
+int					execvp(const char* file, char* const argv[]);
-int			faccessat(int, const char*, int, int);
+int					faccessat(int fd, const char* path, int amode, int flag);
-int			fchdir(int);
+int					fchdir(int fildes);
-int			fchown(int, uid_t, gid_t);
+int					fchown(int fildes, uid_t owner, gid_t group);
-int			fchownat(int, const char*, uid_t, gid_t, int);
+int					fchownat(int fd, const char* path, uid_t owner, gid_t group, int flag);
-int			fdatasync(int);
+int					fdatasync(int fildes);
-int			fexecve(int, char* const[], char* const[]);
+int					fexecve(int fd, char* const argv[], char* const envp[]);
 pid_t				fork(void);
-long		fpathconf(int, int);
+long				fpathconf(int fildes, int name);
-int			fsync(int);
+int					fsync(int fildes);
-int			ftruncate(int, off_t);
+int					ftruncate(int fildes, off_t length);
-char*		getcwd(char*, size_t);
+char*				getcwd(char* buf , size_t size);
 gid_t				getegid(void);
 uid_t				geteuid(void);
 gid_t				getgid(void);
-int			getgroups(int, gid_t[]);
+int					getgroups(int gidsetsize, gid_t grouplist[]);
 long				gethostid(void);
-int			gethostname(char*, size_t);
+int					gethostname(char* name, size_t namelen);
 char*				getlogin(void);
-int			getlogin_r(char*, size_t);
+int					getlogin_r(char* name, size_t namesize);
-int			getopt(int, char* const[], const char*);
+int					getopt(int argc, char*  const argv[], const char* optstring);
-pid_t		getpgid(pid_t);
+pid_t				getpgid(pid_t pid);
 pid_t				getpgrp(void);
 pid_t				getpid(void);
 pid_t				getppid(void);
-pid_t		getsid(pid_t);
+pid_t				getsid(pid_t pid);
 uid_t				getuid(void);
-int			isatty(int);
+int					isatty(int fildes);
-int			lchown(const char*, uid_t, gid_t);
+int					lchown(const char* path, uid_t owner, gid_t group);
-int			link(const char*, const char*);
+int					link(const char* path1, const char* path2);
-int			linkat(int, const char*, int, const char*, int);
+int					linkat(int fd1, const char* path1, int fd2, const char* path2, int flag);
-int			lockf(int, int, off_t);
+int					lockf(int fildes, int function, off_t size);
-off_t		lseek(int, off_t, int);
+off_t				lseek(int fildes, off_t offset, int whence);
-int			nice(int);
+int					nice(int incr);
-long		pathconf(const char*, int);
+long				pathconf(const char* path, int name);
 int					pause(void);
-int			pipe(int[2]);
+int					pipe(int fildes[2]);
-ssize_t		pread(int, void*, size_t, off_t);
+ssize_t				pread(int fildes, void* buf, size_t nbyte, off_t offset);
-ssize_t		pwrite(int, const void*, size_t, off_t);
+ssize_t				pwrite(int fildes, const void* buf, size_t nbyte, off_t offset);
-ssize_t		read(int, void*, size_t);
+ssize_t				read(int fildes, void* buf, size_t nbyte);
-ssize_t		readlink(const char*, char*, size_t);
+ssize_t				readlink(const char* __restrict path, char* __restrict buf, size_t bufsize);
-ssize_t		readlinkat(int, const char*, char*, size_t);
+ssize_t				readlinkat(int fd, const char* __restrict path, char* __restrict buf, size_t bufsize);
-int			rmdir(const char*);
+int					rmdir(const char* path);
-int			setegid(gid_t);
+int					setegid(gid_t gid);
-int			seteuid(uid_t);
+int					seteuid(uid_t uid);
-int			setgid(gid_t);
+int					setgid(gid_t gid);
-int			setpgid(pid_t, pid_t);
+int					setpgid(pid_t pid, pid_t pgid);
 pid_t				setpgrp(void);
-int			setregid(gid_t, gid_t);
+int					setregid(gid_t rgid, gid_t egid);
-int			setreuid(uid_t, uid_t);
+int					setreuid(uid_t ruid, uid_t euid);
 pid_t				setsid(void);
-int			setuid(uid_t);
+int					setuid(uid_t uid);
-unsigned	sleep(unsigned);
+unsigned			sleep(unsigned seconds);
-void		swab(const void*, void*, ssize_t);
+void				swab(const void* __restrict src, void* __restrict dest, ssize_t nbytes);
-int			symlink(const char*, const char*);
+int					symlink(const char* path1, const char* path2);
-int			symlinkat(const char*, int, const char*);
+int					symlinkat(const char* path1, int fd, const char* path2);
 void				sync(void);
-long		sysconf(int);
+long				sysconf(int name);
-pid_t		tcgetpgrp(int);
+pid_t				tcgetpgrp(int fildes);
-int			tcsetpgrp(int, pid_t);
+int					tcsetpgrp(int fildes, pid_t pgid_id);
-int			truncate(const char*, off_t);
+int					truncate(const char* path, off_t length);
-char*		ttyname(int);
+char*				ttyname(int fildes);
-int			ttyname_r(int, char*, size_t);
+int					ttyname_r(int fildes, char* name, size_t namesize);
-int			unlink(const char*);
+int					unlink(const char* path);
-int			unlinkat(int, const char*, int);
+int					unlinkat(int fd, const char* path, int flag);
-ssize_t		write(int, const void*, size_t);
+ssize_t				write(int fildes, const void* buf, size_t nbyte);
 
-long		syscall(long, ...);
+extern char*	optarg;
+extern int		opterr, optind, optopt;
+
+long syscall(long syscall, ...);
 
 __END_DECLS
+
+#endif

libc/include/utime.h

@@ -0,0 +1,23 @@
+#ifndef _UTIME_H
+#define _UTIME_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/utime.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_time_t
+#include <sys/types.h>
+
+struct utimbuf
+{
+	time_t actime;	/* Access time. */
+	time_t modtime;	/* Modification time. */
+};
+
+int utime(const char* path, const struct utimbuf* times);
+
+__END_DECLS
+
+#endif

libc/include/utmpx.h

@@ -0,0 +1,43 @@
+#ifndef _UTMPX_H
+#define _UTMPX_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/utmpx.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_pid_t
+#include <sys/types.h>
+
+#include <sys/time.h>
+
+struct utmpx
+{
+	char			ut_user[32];	/* User login name. */
+	char			ut_id[4];		/* Unspecified initialization process identifier. */
+	char			ut_line[32];	/* Device name. */
+	pid_t			ut_pid;			/* Process ID. */
+	short			ut_type;		/* Type of entry. */
+	struct timeval	ut_tv;			/* Time entry was made. */
+};
+
+#define EMPTY			0
+#define BOOT_TIME		1
+#define OLD_TIME		2
+#define NEW_TIME		3
+#define USER_PROCESS	4
+#define INIT_PROCESS	5
+#define LOGIN_PROCESS	6
+#define DEAD_PROCESS	7
+
+void			endutxent(void);
+struct utmpx*	getutxent(void);
+struct utmpx*	getutxid(const struct utmpx* id);
+struct utmpx*	getutxline(const struct utmpx* line);
+struct utmpx*	pututxline(const struct utmpx* utmpx);
+void			setutxent(void);
+
+__END_DECLS
+
+#endif

libc/include/wchar.h

@@ -0,0 +1,123 @@
+#ifndef _WCHAR_H
+#define _WCHAR_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/wchar.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#include <ctype.h>
+#include <string.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+#include <bits/types/locale_t.h>
+
+struct __mbstate_t;
+typedef struct __mbstate_t mbstate_t;
+
+typedef int wctype_t;
+
+typedef __WINT_TYPE__ wint_t;
+
+#define WCHAR_MIN	__WCHAR_MIN__
+#define WCHAR_MAX	__WCHAR_MAX__
+#define WEOF		((wchar_t)-1)
+
+wint_t				btowc(int c);
+wint_t				fgetwc(FILE* stream);
+wchar_t*			fgetws(wchar_t* __restrict ws, int n, FILE* __restrict stream);
+wint_t				fputwc(wchar_t c, FILE* stream);
+int					fputws(const wchar_t* __restrict ws, FILE* __restrict stream);
+int					fwide(FILE* stream, int mode);
+int					fwprintf(FILE* __restrict stream, const wchar_t* __restrict format, ...);
+int					fwscanf(FILE* __restrict stream, const wchar_t* __restrict format, ...);
+wint_t				getwc(FILE* stream);
+wint_t				getwchar(void);
+int					iswalnum(wint_t wc);
+int					iswalpha(wint_t wc);
+int					iswcntrl(wint_t wc);
+int					iswctype(wint_t wc, wctype_t charclass);
+int					iswdigit(wint_t wc);
+int					iswgraph(wint_t wc);
+int					iswlower(wint_t wc);
+int					iswprint(wint_t wc);
+int					iswpunct(wint_t wc);
+int					iswspace(wint_t wc);
+int					iswupper(wint_t wc);
+int					iswxdigit(wint_t wc);
+size_t				mbrlen(const char* __restrict s, size_t n, mbstate_t* __restrict ps);
+size_t				mbrtowc(wchar_t* __restrict pwc, const char* __restrict s, size_t n, mbstate_t* __restrict ps);
+int					mbsinit(const mbstate_t* ps);
+size_t				mbsnrtowcs(wchar_t* __restrict dst, const char** __restrict src, size_t nmc, size_t len, mbstate_t* __restrict ps);
+size_t				mbsrtowcs(wchar_t* __restrict dst, const char** __restrict src, size_t len, mbstate_t* __restrict ps);
+FILE*				open_wmemstream(wchar_t** bufp, size_t* sizep);
+wint_t				putwc(wchar_t wc, FILE* stream);
+wint_t				putwchar(wchar_t wc);
+int					swprintf(wchar_t* __restrict ws, size_t n, const wchar_t* __restrict format, ...);
+int					swscanf(const wchar_t* __restrict ws, const wchar_t* __restrict format, ...);
+wint_t				towlower(wint_t wc);
+wint_t				towupper(wint_t wc);
+wint_t				ungetwc(wint_t wc, FILE* stream);
+int					vfwprintf(FILE* __restrict stream, const wchar_t* __restrict format, va_list arg);
+int					vfwscanf(FILE* __restrict stream, const wchar_t* __restrict format, va_list arg);
+int					vswprintf(wchar_t* __restrict ws, size_t n, const wchar_t* __restrict format, va_list arg);
+int					vswscanf(const wchar_t* __restrict ws, const wchar_t* __restrict format, va_list arg);
+int					vwprintf(const wchar_t* __restrict format, va_list arg);
+int					vwscanf(const wchar_t* __restrict format, va_list arg);
+wchar_t*			wcpcpy(wchar_t* __restrict ws1, const wchar_t* __restrict ws2);
+wchar_t*			wcpncpy(wchar_t* __restrict ws1, const wchar_t* __restrict ws2, size_t n);
+size_t				wcrtomb(char* __restrict s, wchar_t ws, mbstate_t* __restrict ps);
+int					wcscasecmp(const wchar_t* ws1, const wchar_t* ws2);
+int					wcscasecmp_l(const wchar_t* ws1, const wchar_t* ws2, locale_t locale);
+wchar_t*			wcscat(wchar_t* __restrict ws1, const wchar_t* __restrict ws2);
+wchar_t*			wcschr(const wchar_t* ws, wchar_t wc);
+int					wcscmp(const wchar_t* ws1, const wchar_t* ws2);
+int					wcscoll(const wchar_t* ws1, const wchar_t* ws2);
+int					wcscoll_l(const wchar_t* ws1, const wchar_t* ws2, locale_t locale);
+wchar_t*			wcscpy(wchar_t* __restrict ws1, const wchar_t* __restrict ws2);
+size_t				wcscspn(const wchar_t* ws1, const wchar_t* ws2);
+wchar_t*			wcsdup(const wchar_t* string);
+size_t				wcsftime(wchar_t* __restrict wcs, size_t maxsize, const wchar_t* __restrict format, const struct tm* __restrict timeptr);
+size_t				wcslen(const wchar_t* ws);
+int					wcsncasecmp(const wchar_t* ws1, const wchar_t* ws2, size_t n);
+int					wcsncasecmp_l(const wchar_t* ws1, const wchar_t* ws2, size_t n, locale_t locale);
+wchar_t*			wcsncat(wchar_t* __restrict ws1, const wchar_t* __restrict ws2, size_t n);
+int					wcsncmp(const wchar_t* ws1, const wchar_t* ws2, size_t n);
+wchar_t*			wcsncpy(wchar_t* __restrict ws1, const wchar_t* __restrict ws2, size_t n);
+size_t				wcsnlen(const wchar_t* ws, size_t maxlen);
+size_t				wcsnrtombs(char* __restrict dst, const wchar_t** __restrict src, size_t nwc, size_t len, mbstate_t* __restrict ps);
+wchar_t*			wcspbrk(const wchar_t* ws1, const wchar_t* ws2);
+wchar_t*			wcsrchr(const wchar_t* ws, wchar_t wc);
+size_t				wcsrtombs(char* __restrict dst, const wchar_t** __restrict src, size_t len, mbstate_t* __restrict ps);
+size_t				wcsspn(const wchar_t* ws1, const wchar_t* ws2);
+wchar_t*			wcsstr(const wchar_t* __restrict ws1, const wchar_t* __restrict ws2);
+double				wcstod(const wchar_t* __restrict nptr, wchar_t** __restrict endptr);
+float				wcstof(const wchar_t* __restrict nptr, wchar_t** __restrict endptr);
+wchar_t*			wcstok(wchar_t* __restrict ws1, const wchar_t* __restrict ws2, wchar_t** __restrict ptr);
+long				wcstol(const wchar_t* __restrict nptr, wchar_t** __restrict endptr, int base);
+long double			wcstold(const wchar_t* __restrict nptr, wchar_t** __restrict endptr);
+long long			wcstoll(const wchar_t* __restrict nptr, wchar_t** __restrict endptr, int base);
+unsigned long		wcstoul(const wchar_t* __restrict nptr, wchar_t** __restrict endptr, int base);
+unsigned long long	wcstoull(const wchar_t* __restrict nptr, wchar_t** __restrict endptr, int base);
+int					wcswidth(const wchar_t* pwcs, size_t n);
+size_t				wcsxfrm(wchar_t* __restrict ws1, const wchar_t* __restrict ws2, size_t n);
+size_t				wcsxfrm_l(wchar_t* __restrict ws1, const wchar_t* __restrict ws2, size_t n, locale_t locale);
+int					wctob(wint_t c);
+wctype_t			wctype(const char* property);
+int					wcwidth(wchar_t wc);
+wchar_t*			wmemchr(const wchar_t* ws, wchar_t wc, size_t n);
+int					wmemcmp(const wchar_t* ws1, const wchar_t* ws2, size_t n);
+wchar_t*			wmemcpy(wchar_t* __restrict ws1, const wchar_t* __restrict ws2, size_t n);
+wchar_t*			wmemmove(wchar_t* ws1, const wchar_t* ws2, size_t n);
+wchar_t*			wmemset(wchar_t* ws, wchar_t wc, size_t n);
+int					wprintf(const wchar_t* __restrict format, ...);
+int					wscanf(const wchar_t* __restrict format, ...);
+
+__END_DECLS
+
+#endif

libc/include/wctype.h

@@ -0,0 +1,62 @@
+#ifndef _WCTYPE_H
+#define _WCTYPE_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/wctype.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#include <ctype.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <wchar.h>
+
+#include <bits/types/locale_t.h>
+
+typedef int* wctrans_t;
+
+int			iswalnum(wint_t wc);
+int			iswalnum_l(wint_t wc, locale_t locale);
+int			iswalpha(wint_t wc);
+int			iswalpha_l(wint_t wc, locale_t locale);
+int			iswblank(wint_t wc);
+int			iswblank_l(wint_t wc, locale_t locale);
+int			iswcntrl(wint_t wc);
+int			iswcntrl_l(wint_t wc, locale_t locale);
+int			iswctype(wint_t wc, wctype_t);
+int			iswctype_l(wint_t wc, wctype_t, locale_t locale);
+int			iswdigit(wint_t wc);
+int			iswdigit_l(wint_t wc, locale_t locale);
+int			iswgraph(wint_t wc);
+int			iswgraph_l(wint_t wc, locale_t locale);
+int			iswlower(wint_t wc);
+int			iswlower_l(wint_t wc, locale_t locale);
+int			iswprint(wint_t wc);
+int			iswprint_l(wint_t wc, locale_t locale);
+int			iswpunct(wint_t wc);
+int			iswpunct_l(wint_t wc, locale_t locale);
+int			iswspace(wint_t wc);
+int			iswspace_l(wint_t wc, locale_t locale);
+int			iswupper(wint_t wc);
+int			iswupper_l(wint_t wc, locale_t locale);
+int			iswxdigit(wint_t wc);
+int			iswxdigit_l(wint_t wc, locale_t locale);
+wint_t		towctrans(wint_t wc, wctrans_t);
+wint_t		towctrans_l(wint_t wc, wctrans_t, locale_t locale);
+wint_t		towlower(wint_t wc);
+wint_t		towlower_l(wint_t wc, locale_t locale);
+wint_t		towupper(wint_t wc);
+wint_t		towupper_l(wint_t wc, locale_t locale);
+wctrans_t	wctrans(const char* charclass);
+wctrans_t	wctrans_l(const char* charclass, locale_t locale);
+wctype_t	wctype(const char* property);
+wctype_t	wctype_l(const char* property, locale_t locale);
+
+__END_DECLS
+
+#endif

libc/include/wordexp.h

@@ -0,0 +1,38 @@
+#ifndef _WORDEXP_H
+#define _WORDEXP_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/wordexp.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_size_t
+#include <stddef.h>
+
+typedef struct
+{
+	size_t	we_wordc;	/* Count of words matched by words. */
+	char**	we_wordv;	/* Pointer to list of expanded words. */
+	size_t	we_offs;	/* Slots to reserve at the beginning of we_wordv. */
+} wordexp_t;
+
+#define WRDE_APPEND		0x01
+#define WRDE_DOOFFS		0x02
+#define WRDE_NOCMD		0x04
+#define WRDE_REUSE		0x08
+#define WRDE_SHOWERR	0x10
+#define WRDE_UNDEF		0x20
+
+#define WRDE_BADCHAR	1
+#define WRDE_BADVAL		2
+#define WRDE_CMDSUB		3
+#define WRDE_NOSPACE	4
+#define WRDE_SYNTAX		5
+
+int		wordexp(const char* __restrict words, wordexp_t* __restrict pwordexp, int flags);
+void	wordfree(wordexp_t* pwordexp);
+
+__END_DECLS
+
+#endif

libc/printf_impl.cpp

@@ -1,5 +1,6 @@
 #include <BAN/Traits.h>
 #include <BAN/Math.h>
+#include <bits/printf.h>
 #include <ctype.h>
 #include <errno.h>
 #include <math.h>

libc/stdio.cpp

@@ -1,6 +1,6 @@
+#include <bits/printf.h>
 #include <errno.h>
 #include <fcntl.h>
-#include <printf_impl.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>

libc/unistd.cpp

@@ -1,4 +1,5 @@
 #include <BAN/Assert.h>
+#include <kernel/Syscall.h>
 #include <errno.h>
 #include <stdarg.h>
 #include <stddef.h>