Kernel: Add bareboness possibility to set termios

kernel/include/kernel/Process.h

@@ -59,6 +59,8 @@ namespace Kernel
 		BAN::ErrorOr<BAN::String> working_directory() const;
 		BAN::ErrorOr<void> set_working_directory(BAN::StringView);
 
+		TTY& tty() { ASSERT(m_tty); return *m_tty; }
+
 		BAN::ErrorOr<void*> allocate(size_t);
 		void free(void*);
 

kernel/include/kernel/Syscall.h

@@ -10,6 +10,8 @@
 #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>

kernel/include/kernel/Terminal/TTY.h

@@ -8,7 +8,6 @@
 #include <kernel/Terminal/termios.h>
 #include <kernel/Semaphore.h>
 
-
 namespace Kernel
 {
 	
@@ -18,6 +17,7 @@ namespace Kernel
 		TTY(TerminalDriver*);
 
 		void set_termios(const termios& termios) { m_termios = termios; }
+		termios get_termios() const { return m_termios; }	
 		void set_font(const Kernel::Font&);
 
 		uint32_t height() const { return m_height; }

kernel/kernel/Syscall.cpp

@@ -2,6 +2,8 @@
 #include <kernel/Process.h>
 #include <kernel/Syscall.h>
 
+#include <termios.h>
+
 namespace Kernel
 {
 
@@ -76,6 +78,26 @@ namespace Kernel
 		return res.value();
 	}
 
+	long sys_get_termios(::termios* termios)
+	{
+		auto current = Process::current().tty().get_termios();
+		memset(termios, 0, sizeof(::termios));
+		if (current.canonical)
+			termios->c_lflag |= ICANON;
+		if (current.echo)
+			termios->c_lflag |= ECHO;
+		return 0;
+	}
+
+	long sys_set_termios(const ::termios* termios)
+	{
+		Kernel::termios new_termios;
+		new_termios.canonical = termios->c_lflag & ICANON;
+		new_termios.echo = termios->c_lflag & ECHO;
+		Process::current().tty().set_termios(new_termios);
+		return 0;
+	}
+
 	extern "C" long cpp_syscall_handler(int syscall, uintptr_t arg1, uintptr_t arg2, uintptr_t arg3, uintptr_t arg4, uintptr_t arg5)
 	{
 		Thread::current().set_in_syscall(true);
@@ -121,6 +143,12 @@ namespace Kernel
 		case SYS_TELL:
 			ret = sys_tell((int)arg1);
 			break;
+		case SYS_GET_TERMIOS:
+			ret = sys_get_termios((::termios*)arg1);
+			break;
+		case SYS_SET_TERMIOS:
+			ret = sys_set_termios((const ::termios*)arg1);
+			break;
 		default:
 			Kernel::panic("Unknown syscall {}", syscall);
 		}

libc/CMakeLists.txt

@@ -9,6 +9,7 @@ set(LIBC_SOURCES
 	stdio.cpp
 	stdlib.cpp
 	string.cpp
+	termios.cpp
 	unistd.cpp
 	math.S
 )

libc/include/termios.h

@@ -0,0 +1,120 @@
+#pragma once
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+#define NCCS 0
+
+// c_iflag
+#define BRKINT	0x001
+#define ICRNL	0x002
+#define IGNBRK	0x004
+#define IGNCR	0x008
+#define IGNPAR	0x010
+#define INLCR	0x020
+#define INPCK	0x040
+#define ISTRIP	0x080
+#define IXANY	0x100
+#define IXOFF	0x200
+#define IXON	0x400
+#define PARMRK	0x800
+
+// c_oflag
+#define OPOST	0x0001
+#define ONLCR	0x0002
+#define OCRNL	0x0004
+#define ONOCR	0x0008
+#define ONLRET	0x0010
+#define OFDEL	0x0020
+#define OFILL	0x0040
+#define NLDLY	0x0080
+	#define NL0 0
+	#define NL1 1
+#define CRDLY	0x0100
+	#define CR0 0
+	#define CR1 1
+	#define CR2 2
+	#define CR3 3
+#define TABDLY	0x0200
+	#define TAB0 0
+	#define TAB1 1
+	#define TAB2 2
+	#define TAB3 3
+#define BSDLY	0x0400
+	#define BS0 0
+	#define BS1 1
+#define VTDLY	0x0800
+	#define VT0 0
+	#define VT1 1
+#define FFDLY	0x1000
+	#define FF0 0
+	#define FF1 1
+
+// c_cflag
+#define CSIZE	0x01
+	#define CS5 5
+	#define CS6 6
+	#define CS7 7
+	#define CS8 8
+#define CSTOPB	0x02
+#define CREAD	0x04
+#define PARENB	0x08
+#define PARODD	0x10
+#define HUPCL	0x20
+#define CLOCAL	0x40
+
+// c_lflag
+#define ECHO	0x001
+#define ECHOE	0x002
+#define ECHOK	0x004
+#define ECHONL	0x008
+#define ICANON	0x010
+#define IEXTEN	0x020
+#define ISIG	0x040
+#define NOFLSH	0x080
+#define TOSTOP	0x100
+
+// for tcsetattr
+#define TCSANOW		1
+#define TCSADRAIN	2
+#define TCSAFLUSH	3
+
+// for tcflush
+#define TCIFLUSH	0x01
+#define TCIOFLUSH	(TCIFLUSH | TCOFLUSH)
+#define TCOFLUSH	0x02
+
+// for tcflow
+#define TCIOFF	1
+#define TCION	2
+#define TCOOFF	3
+#define TCOON	4
+
+__BEGIN_DECLS
+
+typedef int cc_t;
+typedef int speed_t;
+typedef int tcflag_t;
+
+struct termios
+{
+	tcflag_t c_iflag;
+	tcflag_t c_oflag;
+	tcflag_t c_cflag;
+	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

libc/termios.cpp

@@ -0,0 +1,31 @@
+#include <sys/syscall.h>
+#include <termios.h>
+#include <unistd.h>
+
+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* termios)
+{
+	return syscall(SYS_GET_TERMIOS, termios);
+}
+
+pid_t tcgetsid(int);
+
+int tcsendbreak(int, int);
+
+int tcsetattr(int, int, const struct termios* termios)
+{
+	return syscall(SYS_SET_TERMIOS, termios);
+}

libc/unistd.cpp

@@ -90,6 +90,18 @@ long syscall(long syscall, ...)
 			ret = Kernel::syscall(SYS_TELL, fd);
 			break;
 		}
+		case SYS_GET_TERMIOS:
+		{
+			struct termios* termios = va_arg(args, struct termios*);
+			ret = Kernel::syscall(SYS_GET_TERMIOS, (uintptr_t)termios);
+			break;
+		}
+		case SYS_SET_TERMIOS:
+		{
+			const struct termios* termios = va_arg(args, const struct termios*);
+			ret = Kernel::syscall(SYS_SET_TERMIOS, (uintptr_t)termios);
+			break;
+		}
 		default:
 			puts("LibC: Unhandeled syscall");
 			ret = -ENOSYS;