user: implement mlibc as the libc, finally.

It's finally done..

Signed-off-by: kaguya <vpshinomiya@protonmail.com>

user/include/mlibc/options/posix/generic/termios.cpp

@@ -0,0 +1,103 @@
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE
+#endif
+
+#include <errno.h>
+#include <termios.h>
+#include <sys/ioctl.h>
+
+#include <bits/ensure.h>
+#include <mlibc/posix-sysdeps.hpp>
+
+speed_t cfgetispeed(const struct termios *tios) {
+	return tios->c_cflag & CBAUD;
+}
+
+speed_t cfgetospeed(const struct termios *tios) {
+	return tios->c_cflag & CBAUD;
+}
+
+int cfsetispeed(struct termios *termios, speed_t speed) {
+	return speed ? cfsetospeed(termios, speed) : 0;
+}
+
+int cfsetospeed(struct termios *termios, speed_t speed) {
+	if(speed & ~CBAUD) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	termios->c_cflag &= ~CBAUD;
+	termios->c_cflag |= speed;
+
+	return 0;
+}
+
+void cfmakeraw(struct termios *t) {
+	t->c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IXON);
+	t->c_oflag &= ~OPOST;
+	t->c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
+	t->c_cflag &= ~(CSIZE | PARENB);
+	t->c_cflag |= CS8;
+	t->c_cc[VMIN] = 1;
+	t->c_cc[VTIME] = 0;
+}
+
+int tcdrain(int fd) {
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_tcdrain, -1);
+	if(int e = mlibc::sys_tcdrain(fd); e) {
+		errno = e;
+		return -1;
+	}
+	return 0;
+}
+
+int tcflow(int fd, int action) {
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_tcflow, -1);
+	if(int e = mlibc::sys_tcflow(fd, action); e) {
+		errno = e;
+		return -1;
+	}
+	return 0;
+}
+
+int tcflush(int fd, int queue_selector) {
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_tcflush, -1);
+	if(int e = mlibc::sys_tcflush(fd, queue_selector); e) {
+		errno = e;
+		return -1;
+	}
+	return 0;
+}
+
+int tcgetattr(int fd, struct termios *attr) {
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_tcgetattr, -1);
+	if(int e = mlibc::sys_tcgetattr(fd, attr); e) {
+		errno = e;
+		return -1;
+	}
+	return 0;
+}
+
+pid_t tcgetsid(int fd) {
+	int sid;
+	if(ioctl(fd, TIOCGSID, &sid) < 0) {
+		return -1;
+	}
+	return sid;
+}
+
+int tcsendbreak(int, int) {
+	__ensure(!"Not implemented");
+	__builtin_unreachable();
+}
+
+int tcsetattr(int fd, int opts, const struct termios *attr) {
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_tcsetattr, -1);
+	if(int e = mlibc::sys_tcsetattr(fd, opts, attr); e) {
+		errno = e;
+		return -1;
+	}
+	return 0;
+}
+