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https://sourceware.org/git/glibc.git
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b8fd550293
* sysdeps/posix/ttyname.c: Make name variable from getttyname function global (with file scope). Add __libc_subfreeres function to free the string. * sysdeps/unix/sysv/linux/ttyname.c: Likewise. Also for buf variable in ttyname function. * sysdeps/generic/strtok.c: Remove initializer for olds variable. * crypt/md5-crypt.c: Let destructor deallocate static buffer. * iconvdata/sjis.c (from_ucs4_lat1): Handle U005C and U007E by mapping them to /x5c and /x7e respectively.
145 lines
3.6 KiB
C
145 lines
3.6 KiB
C
/* Copyright (C) 1991, 92, 93, 96, 97, 98, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <errno.h>
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#include <limits.h>
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#include <stddef.h>
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#include <dirent.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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char *__ttyname;
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static char *getttyname (int fd, dev_t mydev, ino_t myino,
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int save, int *dostat) internal_function;
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static char *getttyname_name;
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static char *
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internal_function
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getttyname (fd, mydev, myino, save, dostat)
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int fd;
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dev_t mydev;
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ino_t myino;
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int save;
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int *dostat;
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{
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static const char dev[] = "/dev";
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static size_t namelen;
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struct stat st;
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DIR *dirstream;
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struct dirent *d;
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dirstream = __opendir (dev);
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if (dirstream == NULL)
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{
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*dostat = -1;
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return NULL;
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}
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while ((d = __readdir (dirstream)) != NULL)
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if (((ino_t) d->d_fileno == myino || *dostat)
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&& strcmp (d->d_name, "stdin")
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&& strcmp (d->d_name, "stdout")
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&& strcmp (d->d_name, "stderr"))
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{
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size_t dlen = _D_ALLOC_NAMLEN (d);
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if (sizeof (dev) + dlen > namelen)
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{
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free (getttyname_name);
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namelen = 2 * (sizeof (dev) + dlen); /* Big enough. */
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getttyname_name = malloc (namelen);
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if (! getttyname_name)
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{
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*dostat = -1;
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/* Perhaps it helps to free the directory stream buffer. */
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(void) __closedir (dirstream);
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return NULL;
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}
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*((char *) __mempcpy (getttyname_name, dev, sizeof (dev) - 1))
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= '/';
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}
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(void) __mempcpy (&getttyname_name[sizeof (dev)], d->d_name, dlen);
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if (stat (getttyname_name, &st) == 0
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#ifdef _STATBUF_ST_RDEV
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&& S_ISCHR (st.st_mode) && st.st_rdev == mydev
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#else
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&& (ino_t) d->d_fileno == myino && st.st_dev == mydev
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#endif
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)
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{
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(void) __closedir (dirstream);
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__ttyname = getttyname_name;
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__set_errno (save);
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return getttyname_name;
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}
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}
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(void) __closedir (dirstream);
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__set_errno (save);
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return NULL;
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}
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/* Return the pathname of the terminal FD is open on, or NULL on errors.
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The returned storage is good only until the next call to this function. */
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char *
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ttyname (fd)
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int fd;
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{
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struct stat st;
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int dostat = 0;
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char *name;
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int save = errno;
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if (!__isatty (fd))
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return NULL;
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if (fstat (fd, &st) < 0)
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return NULL;
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#ifdef _STATBUF_ST_RDEV
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name = getttyname (fd, st.st_rdev, st.st_ino, save, &dostat);
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#else
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name = getttyname (fd, st.st_dev, st.st_ino, save, &dostat);
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#endif
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if (!name && dostat != -1)
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{
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dostat = 1;
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#ifdef _STATBUF_ST_RDEV
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name = getttyname (fd, st.st_rdev, st.st_ino, save, &dostat);
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#else
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name = getttyname (fd, st.st_dev, st.st_ino, save, &dostat);
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#endif
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}
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return name;
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}
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static void
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free_mem (void)
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{
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free (getttyname_name);
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}
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text_set_element (__libc_subfreeres, free_mem);
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