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

int posix_openpt(int flags) {
  return open("/dev/ptmx", flags);
}

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);