diff options
Diffstat (limited to 'sysdeps/posix/ttyname.c')
-rw-r--r-- | sysdeps/posix/ttyname.c | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/sysdeps/posix/ttyname.c b/sysdeps/posix/ttyname.c deleted file mode 100644 index 288e22b307..0000000000 --- a/sysdeps/posix/ttyname.c +++ /dev/null @@ -1,129 +0,0 @@ -/* Copyright (C) 1991-2017 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, see - <http://www.gnu.org/licenses/>. */ - -#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; - - -libc_freeres_ptr (static char *getttyname_name); - -static char * -internal_function -getttyname (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 (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; -} |