LibC: Add stubs for tmpfile, mktemp and fchmod

userspace/libraries/LibC/include/stdlib.h

@@ -73,6 +73,7 @@ int					mblen(const char* s, size_t n);
 size_t				mbstowcs(wchar_t* __restrict pwcs, const char* __restrict s, size_t n);
 int					mbtowc(wchar_t* __restrict pwc, const char* __restrict s, size_t n);
 char*				mkdtemp(char* _template);
+char*				mktemp(char* _template);
 int					mkstemp(char* _template);
 long				mrand48(void);
 long				nrand48(unsigned short xsubi[3]);

userspace/libraries/LibC/stdio.cpp

@@ -840,3 +840,8 @@ int vsscanf(const char* s, const char* format, va_list arguments)
 		}, &s
 	);
 }
+
+FILE* tmpfile(void)
+{
+	ASSERT_NOT_REACHED();
+}

userspace/libraries/LibC/stdlib.cpp

@@ -514,6 +514,11 @@ int putenv(char* string)
 	return 0;
 }
 
+char* mktemp(char*)
+{
+	ASSERT_NOT_REACHED();
+}
+
 size_t mbstowcs(wchar_t* __restrict pwcs, const char* __restrict s, size_t n)
 {
 	auto* us = reinterpret_cast<const unsigned char*>(s);

userspace/libraries/LibC/sys/stat.cpp

@@ -1,3 +1,5 @@
+#include <BAN/Assert.h>
+
 #include <errno.h>
 #include <fcntl.h>
 #include <sys/stat.h>
@@ -11,6 +13,11 @@ int chmod(const char* path, mode_t mode)
 	return syscall(SYS_CHMOD, path, mode);
 }
 
+int fchmod(int, mode_t)
+{
+	ASSERT_NOT_REACHED();
+}
+
 int fstat(int fildes, struct stat* buf)
 {
 	return syscall(SYS_FSTAT, fildes, buf);