diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/ttyname_r.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/ttyname_r.c | 221 |
1 files changed, 0 insertions, 221 deletions
diff --git a/sysdeps/unix/sysv/linux/ttyname_r.c b/sysdeps/unix/sysv/linux/ttyname_r.c deleted file mode 100644 index dc863526ba..0000000000 --- a/sysdeps/unix/sysv/linux/ttyname_r.c +++ /dev/null @@ -1,221 +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 <termios.h> -#include <unistd.h> -#include <string.h> -#include <stdlib.h> - -#include <_itoa.h> - -#include "ttyname.h" - -static int getttyname_r (char *buf, size_t buflen, - dev_t mydev, ino64_t myino, int save, - int *dostat) internal_function; - -static int -internal_function attribute_compat_text_section -getttyname_r (char *buf, size_t buflen, dev_t mydev, ino64_t myino, - int save, int *dostat) -{ - struct stat64 st; - DIR *dirstream; - struct dirent64 *d; - size_t devlen = strlen (buf); - - dirstream = __opendir (buf); - if (dirstream == NULL) - { - *dostat = -1; - return errno; - } - - while ((d = __readdir64 (dirstream)) != NULL) - if ((d->d_fileno == myino || *dostat) - && strcmp (d->d_name, "stdin") - && strcmp (d->d_name, "stdout") - && strcmp (d->d_name, "stderr")) - { - char *cp; - size_t needed = _D_EXACT_NAMLEN (d) + 1; - - if (needed > buflen) - { - *dostat = -1; - (void) __closedir (dirstream); - __set_errno (ERANGE); - return ERANGE; - } - - cp = __stpncpy (buf + devlen, d->d_name, needed); - cp[0] = '\0'; - - if (__xstat64 (_STAT_VER, buf, &st) == 0 -#ifdef _STATBUF_ST_RDEV - && S_ISCHR (st.st_mode) && st.st_rdev == mydev -#else - && d->d_fileno == myino && st.st_dev == mydev -#endif - ) - { - (void) __closedir (dirstream); - __set_errno (save); - return 0; - } - } - - (void) __closedir (dirstream); - __set_errno (save); - /* It is not clear what to return in this case. `isatty' says FD - refers to a TTY but no entry in /dev has this inode. */ - return ENOTTY; -} - -/* Store at most BUFLEN character of the pathname of the terminal FD is - open on in BUF. Return 0 on success, otherwise an error number. */ -int -__ttyname_r (int fd, char *buf, size_t buflen) -{ - char procname[30]; - struct stat64 st, st1; - int dostat = 0; - int save = errno; - - /* Test for the absolute minimal size. This makes life easier inside - the loop. */ - if (!buf) - { - __set_errno (EINVAL); - return EINVAL; - } - - if (buflen < sizeof ("/dev/pts/")) - { - __set_errno (ERANGE); - return ERANGE; - } - - /* isatty check, tcgetattr is used because it sets the correct - errno (EBADF resp. ENOTTY) on error. */ - struct termios term; - if (__glibc_unlikely (__tcgetattr (fd, &term) < 0)) - return errno; - - if (__fxstat64 (_STAT_VER, fd, &st) < 0) - return errno; - - /* We try using the /proc filesystem. */ - *_fitoa_word (fd, __stpcpy (procname, "/proc/self/fd/"), 10, 0) = '\0'; - - ssize_t ret = __readlink (procname, buf, buflen - 1); - if (__glibc_unlikely (ret == -1 && errno == ENAMETOOLONG)) - { - __set_errno (ERANGE); - return ERANGE; - } - - if (__glibc_likely (ret != -1)) - { -#define UNREACHABLE_LEN strlen ("(unreachable)") - if (ret > UNREACHABLE_LEN - && memcmp (buf, "(unreachable)", UNREACHABLE_LEN) == 0) - { - memmove (buf, buf + UNREACHABLE_LEN, ret - UNREACHABLE_LEN); - ret -= UNREACHABLE_LEN; - } - - /* readlink need not terminate the string. */ - buf[ret] = '\0'; - - /* Verify readlink result, fall back on iterating through devices. */ - if (buf[0] == '/' - && __xstat64 (_STAT_VER, buf, &st1) == 0 -#ifdef _STATBUF_ST_RDEV - && S_ISCHR (st1.st_mode) - && st1.st_rdev == st.st_rdev -#endif - && st1.st_ino == st.st_ino - && st1.st_dev == st.st_dev) - return 0; - - /* If the link doesn't exist, then it points to a device in another - * namespace. - */ - if (is_pty (&st)) - { - __set_errno (ENODEV); - return ENODEV; - } - } - - /* Prepare the result buffer. */ - memcpy (buf, "/dev/pts/", sizeof ("/dev/pts/")); - buflen -= sizeof ("/dev/pts/") - 1; - - if (__xstat64 (_STAT_VER, buf, &st1) == 0 && S_ISDIR (st1.st_mode)) - { -#ifdef _STATBUF_ST_RDEV - ret = getttyname_r (buf, buflen, st.st_rdev, st.st_ino, save, - &dostat); -#else - ret = getttyname_r (buf, buflen, st.st_dev, st.st_ino, save, - &dostat); -#endif - } - else - { - __set_errno (save); - ret = ENOENT; - } - - if (ret && dostat != -1) - { - buf[sizeof ("/dev/") - 1] = '\0'; - buflen += sizeof ("pts/") - 1; -#ifdef _STATBUF_ST_RDEV - ret = getttyname_r (buf, buflen, st.st_rdev, st.st_ino, save, - &dostat); -#else - ret = getttyname_r (buf, buflen, st.st_dev, st.st_ino, save, - &dostat); -#endif - } - - if (ret && dostat != -1) - { - buf[sizeof ("/dev/") - 1] = '\0'; - dostat = 1; -#ifdef _STATBUF_ST_RDEV - ret = getttyname_r (buf, buflen, st.st_rdev, st.st_ino, - save, &dostat); -#else - ret = getttyname_r (buf, buflen, st.st_dev, st.st_ino, - save, &dostat); -#endif - } - - return ret; -} - -weak_alias (__ttyname_r, ttyname_r) |