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author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
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committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /sysdeps/unix/sysv/linux/ttyname.c | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-zack/build-layout-experiment.tar.gz |
Prepare for radical source tree reorganization.zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).
Diffstat (limited to 'sysdeps/unix/sysv/linux/ttyname.c')
-rw-r--r-- | sysdeps/unix/sysv/linux/ttyname.c | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/sysdeps/unix/sysv/linux/ttyname.c b/sysdeps/unix/sysv/linux/ttyname.c deleted file mode 100644 index 5909cb765f..0000000000 --- a/sysdeps/unix/sysv/linux/ttyname.c +++ /dev/null @@ -1,223 +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" - -#if 0 -/* Is this used anywhere? It is not exported. */ -char *__ttyname; -#endif - -static char *getttyname (const char *dev, dev_t mydev, - ino64_t myino, int save, int *dostat) - internal_function; - - -libc_freeres_ptr (static char *getttyname_name); - -static char * -internal_function attribute_compat_text_section -getttyname (const char *dev, dev_t mydev, ino64_t myino, int save, int *dostat) -{ - static size_t namelen; - struct stat64 st; - DIR *dirstream; - struct dirent64 *d; - size_t devlen = strlen (dev) + 1; - - dirstream = __opendir (dev); - if (dirstream == NULL) - { - *dostat = -1; - return NULL; - } - - /* Prepare for the loop. If we already have a buffer copy the directory - name we look at into it. */ - if (devlen < namelen) - *((char *) __mempcpy (getttyname_name, dev, devlen - 1)) = '/'; - - 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")) - { - size_t dlen = _D_ALLOC_NAMLEN (d); - if (devlen + dlen > namelen) - { - free (getttyname_name); - namelen = 2 * (devlen + 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, devlen - 1)) = '/'; - } - memcpy (&getttyname_name[devlen], d->d_name, dlen); - if (__xstat64 (_STAT_VER, getttyname_name, &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); -#if 0 - __ttyname = getttyname_name; -#endif - __set_errno (save); - return getttyname_name; - } - } - - (void) __closedir (dirstream); - __set_errno (save); - return NULL; -} - - -/* Static buffer in `ttyname'. */ -libc_freeres_ptr (static char *ttyname_buf); - - -/* 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) -{ - static size_t buflen; - char procname[30]; - struct stat64 st, st1; - int dostat = 0; - char *name; - int save = errno; - struct termios term; - - /* isatty check, tcgetattr is used because it sets the correct - errno (EBADF resp. ENOTTY) on error. */ - if (__glibc_unlikely (__tcgetattr (fd, &term) < 0)) - return NULL; - - if (__fxstat64 (_STAT_VER, fd, &st) < 0) - return NULL; - - /* We try using the /proc filesystem. */ - *_fitoa_word (fd, __stpcpy (procname, "/proc/self/fd/"), 10, 0) = '\0'; - - if (buflen == 0) - { - buflen = 4095; - ttyname_buf = (char *) malloc (buflen + 1); - if (ttyname_buf == NULL) - { - buflen = 0; - return NULL; - } - } - - ssize_t len = __readlink (procname, ttyname_buf, buflen); - if (__glibc_likely (len != -1)) - { - if ((size_t) len >= buflen) - return NULL; - -#define UNREACHABLE_LEN strlen ("(unreachable)") - if (len > UNREACHABLE_LEN - && memcmp (ttyname_buf, "(unreachable)", UNREACHABLE_LEN) == 0) - { - memmove (ttyname_buf, ttyname_buf + UNREACHABLE_LEN, - len - UNREACHABLE_LEN); - len -= UNREACHABLE_LEN; - } - - /* readlink need not terminate the string. */ - ttyname_buf[len] = '\0'; - - /* Verify readlink result, fall back on iterating through devices. */ - if (ttyname_buf[0] == '/' - && __xstat64 (_STAT_VER, ttyname_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 ttyname_buf; - - /* If the link doesn't exist, then it points to a device in another - namespace. */ - if (is_pty (&st)) - { - __set_errno (ENODEV); - return NULL; - } - } - - if (__xstat64 (_STAT_VER, "/dev/pts", &st1) == 0 && S_ISDIR (st1.st_mode)) - { -#ifdef _STATBUF_ST_RDEV - name = getttyname ("/dev/pts", st.st_rdev, st.st_ino, save, &dostat); -#else - name = getttyname ("/dev/pts", st.st_dev, st.st_ino, save, &dostat); -#endif - } - else - { - __set_errno (save); - name = NULL; - } - - if (!name && dostat != -1) - { -#ifdef _STATBUF_ST_RDEV - name = getttyname ("/dev", st.st_rdev, st.st_ino, save, &dostat); -#else - name = getttyname ("/dev", st.st_dev, st.st_ino, save, &dostat); -#endif - } - - if (!name && dostat != -1) - { - dostat = 1; -#ifdef _STATBUF_ST_RDEV - name = getttyname ("/dev", st.st_rdev, st.st_ino, save, &dostat); -#else - name = getttyname ("/dev", st.st_dev, st.st_ino, save, &dostat); -#endif - } - - return name; -} |