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 {
10 int r = open("/dev/ptmx", flags);
11 if (r < 0 && errno == ENOSPC) errno = EAGAIN;
12 return r;
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);
36