mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-02 01:40:07 +00:00
79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
|
/* Copyright (C) 1998 Free Software Foundation, Inc.
|
||
|
|
This file is part of the GNU C Library.
|
||
|
|
|
||
|
|
The GNU C Library is free software; you can redistribute it and/or
|
||
|
|
modify it under the terms of the GNU Library General Public License as
|
||
|
|
published by the Free Software Foundation; either version 2 of the
|
||
|
|
License, or (at your option) any later version.
|
||
|
|
|
||
|
|
The GNU C Library 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
|
||
|
|
Library General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Library General Public
|
||
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
||
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||
|
|
Boston, MA 02111-1307, USA. */
|
||
|
|
|
||
|
|
#include <errno.h>
|
||
|
|
#include <paths.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <sys/stat.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
|
||
|
|
/* Static buffer for `ptsname'. */
|
||
|
|
static char buffer[sizeof (_PATH_TTY) + 2];
|
||
|
|
|
||
|
|
|
||
|
|
/* Return the pathname of the pseudo terminal slave assoicated with
|
||
|
|
the master FD is open on, or NULL on errors.
|
||
|
|
The returned storage is good until the next call to this function. */
|
||
|
|
char *
|
||
|
|
ptsname (int fd)
|
||
|
|
{
|
||
|
|
return __ptsname_r (fd, buffer, sizeof (buffer)) != 0 ? NULL : buffer;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* Store at most BUFLEN characters of the pathname of the slave pseudo
|
||
|
|
terminal associated with the master FD is open on in BUF.
|
||
|
|
Return 0 on success, otherwise an error number. */
|
||
|
|
int
|
||
|
|
__ptsname_r (int fd, char *buf, size_t buflen)
|
||
|
|
{
|
||
|
|
int save_errno = errno;
|
||
|
|
struct stat st;
|
||
|
|
|
||
|
|
if (buf == NULL)
|
||
|
|
{
|
||
|
|
__set_errno (EINVAL);
|
||
|
|
return EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!__isatty (fd))
|
||
|
|
{
|
||
|
|
__set_errno (ENOTTY);
|
||
|
|
return ENOTTY;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (buflen < strlen (_PATH_TTY) + 3)
|
||
|
|
{
|
||
|
|
__set_errno (ERANGE);
|
||
|
|
return ERANGE;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (__ttyname_r (fd, buf, buflen) != 0)
|
||
|
|
return errno;
|
||
|
|
|
||
|
|
buf[sizeof (_PATH_DEV) - 1] = 't';
|
||
|
|
|
||
|
|
if (__stat (buf, &st) < 0)
|
||
|
|
return errno;
|
||
|
|
|
||
|
|
__set_errno (save_errno);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
weak_alias (__ptsname_r, ptsname_r)
|