mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-26 23:10:06 +00:00
41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
145 lines
3.5 KiB
C
145 lines
3.5 KiB
C
/* Copyright (C) 1991, 92, 93, 96, 97, 98, 2000 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 Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <stddef.h>
|
|
#include <dirent.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
|
|
char *__ttyname;
|
|
|
|
static char *getttyname (int fd, dev_t mydev, ino_t myino,
|
|
int save, int *dostat) internal_function;
|
|
|
|
|
|
static char *getttyname_name;
|
|
|
|
static char *
|
|
internal_function
|
|
getttyname (fd, mydev, myino, save, dostat)
|
|
int fd;
|
|
dev_t mydev;
|
|
ino_t myino;
|
|
int save;
|
|
int *dostat;
|
|
{
|
|
static const char dev[] = "/dev";
|
|
static size_t namelen;
|
|
struct stat st;
|
|
DIR *dirstream;
|
|
struct dirent *d;
|
|
|
|
dirstream = __opendir (dev);
|
|
if (dirstream == NULL)
|
|
{
|
|
*dostat = -1;
|
|
return NULL;
|
|
}
|
|
|
|
while ((d = __readdir (dirstream)) != NULL)
|
|
if (((ino_t) d->d_fileno == myino || *dostat)
|
|
&& strcmp (d->d_name, "stdin")
|
|
&& strcmp (d->d_name, "stdout")
|
|
&& strcmp (d->d_name, "stderr"))
|
|
{
|
|
size_t dlen = _D_ALLOC_NAMLEN (d);
|
|
if (sizeof (dev) + dlen > namelen)
|
|
{
|
|
free (getttyname_name);
|
|
namelen = 2 * (sizeof (dev) + dlen); /* Big enough. */
|
|
getttyname_name = malloc (namelen);
|
|
if (! getttyname_name)
|
|
{
|
|
*dostat = -1;
|
|
/* Perhaps it helps to free the directory stream buffer. */
|
|
(void) __closedir (dirstream);
|
|
return NULL;
|
|
}
|
|
*((char *) __mempcpy (getttyname_name, dev, sizeof (dev) - 1))
|
|
= '/';
|
|
}
|
|
(void) __mempcpy (&getttyname_name[sizeof (dev)], d->d_name, dlen);
|
|
if (stat (getttyname_name, &st) == 0
|
|
#ifdef _STATBUF_ST_RDEV
|
|
&& S_ISCHR (st.st_mode) && st.st_rdev == mydev
|
|
#else
|
|
&& (ino_t) d->d_fileno == myino && st.st_dev == mydev
|
|
#endif
|
|
)
|
|
{
|
|
(void) __closedir (dirstream);
|
|
__ttyname = getttyname_name;
|
|
__set_errno (save);
|
|
return getttyname_name;
|
|
}
|
|
}
|
|
|
|
(void) __closedir (dirstream);
|
|
__set_errno (save);
|
|
return NULL;
|
|
}
|
|
|
|
/* Return the pathname of the terminal FD is open on, or NULL on errors.
|
|
The returned storage is good only until the next call to this function. */
|
|
char *
|
|
ttyname (fd)
|
|
int fd;
|
|
{
|
|
struct stat st;
|
|
int dostat = 0;
|
|
char *name;
|
|
int save = errno;
|
|
|
|
if (!__isatty (fd))
|
|
return NULL;
|
|
|
|
if (fstat (fd, &st) < 0)
|
|
return NULL;
|
|
|
|
#ifdef _STATBUF_ST_RDEV
|
|
name = getttyname (fd, st.st_rdev, st.st_ino, save, &dostat);
|
|
#else
|
|
name = getttyname (fd, st.st_dev, st.st_ino, save, &dostat);
|
|
#endif
|
|
|
|
if (!name && dostat != -1)
|
|
{
|
|
dostat = 1;
|
|
#ifdef _STATBUF_ST_RDEV
|
|
name = getttyname (fd, st.st_rdev, st.st_ino, save, &dostat);
|
|
#else
|
|
name = getttyname (fd, st.st_dev, st.st_ino, save, &dostat);
|
|
#endif
|
|
}
|
|
|
|
return name;
|
|
}
|
|
|
|
|
|
static void
|
|
free_mem (void)
|
|
{
|
|
free (getttyname_name);
|
|
}
|
|
text_set_element (__libc_subfreeres, free_mem);
|