[wasi-libc.git] / libc-top-half / musl / src / misc / pty.c

#include <stdlib.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include "syscall.h"

int posix_openpt(int flags)
{
	int r = open("/dev/ptmx", flags);
	if (r < 0 && errno == ENOSPC) errno = EAGAIN;
	return r;
}

int grantpt(int fd)
{
	return 0;
}

int unlockpt(int fd)
{
	int unlock = 0;
	return ioctl(fd, TIOCSPTLCK, &unlock);
}

int __ptsname_r(int fd, char *buf, size_t len)
{
	int pty, err;
	if (!buf) len = 0;
	if ((err = __syscall(SYS_ioctl, fd, TIOCGPTN, &pty))) return -err;
	if (snprintf(buf, len, "/dev/pts/%d", pty) >= len) return ERANGE;
	return 0;
}

weak_alias(__ptsname_r, ptsname_r);
Commit	Line	Data
320054e8 DG	1	#include <stdlib.h>
	2	#include <sys/ioctl.h>
	3	#include <stdio.h>
	4	#include <fcntl.h>
	5	#include <errno.h>
	6	#include "syscall.h"
	7
	8	int posix_openpt(int flags)
	9	{
575e1579 DG	10	int r = open("/dev/ptmx", flags);
	11	if (r < 0 && errno == ENOSPC) errno = EAGAIN;
	12	return r;
320054e8 DG	13	}
	14
	15	int grantpt(int fd)
	16	{
	17	return 0;
	18	}
	19
	20	int unlockpt(int fd)
	21	{
	22	int unlock = 0;
	23	return ioctl(fd, TIOCSPTLCK, &unlock);
	24	}
	25
	26	int __ptsname_r(int fd, char *buf, size_t len)
	27	{
	28	int pty, err;
	29	if (!buf) len = 0;
	30	if ((err = __syscall(SYS_ioctl, fd, TIOCGPTN, &pty))) return -err;
	31	if (snprintf(buf, len, "/dev/pts/%d", pty) >= len) return ERANGE;
	32	return 0;
	33	}
	34
	35	weak_alias(__ptsname_r, ptsname_r);