cosmopolitan/libc/calls/ptsname_r.c

39 lines
2.4 KiB
C

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/termios.h"
#include "libc/errno.h"
#include "libc/fmt/fmt.h"
#include "libc/sysv/consts/termios.h"
#include "libc/sysv/errfuns.h"
errno_t ptsname_r(int fd, char *buf, size_t size) {
int pty;
if (size) {
if (!buf) return einval();
if (ioctl(fd, TIOCGPTN, &pty) == -1) return errno;
if (snprintf(buf, size, "/dev/pts/%d", pty) >= size) {
return (errno = ERANGE);
}
/* TODO(jart): OpenBSD OMG */
}
return 0;
}