diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/getcwd.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/getcwd.c | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/sysdeps/unix/sysv/linux/getcwd.c b/sysdeps/unix/sysv/linux/getcwd.c deleted file mode 100644 index 3b556fd450..0000000000 --- a/sysdeps/unix/sysv/linux/getcwd.c +++ /dev/null @@ -1,135 +0,0 @@ -/* Determine current working directory. Linux version. - Copyright (C) 1997-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. - - 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 <assert.h> -#include <errno.h> -#include <limits.h> -#include <stdlib.h> -#include <unistd.h> -#include <sys/param.h> - -#include <sysdep.h> -#include <sys/syscall.h> - - -/* If we compile the file for use in ld.so we don't need the feature - that getcwd() allocates the buffers itself. */ -#if IS_IN (rtld) -# define NO_ALLOCATION 1 -#endif - - -/* The "proc" filesystem provides an easy method to retrieve the value. - For each process, the corresponding directory contains a symbolic link - named `cwd'. Reading the content of this link immediate gives us the - information. But we have to take care for systems which do not have - the proc filesystem mounted. Use the POSIX implementation in this case. */ -static char *generic_getcwd (char *buf, size_t size) internal_function; - -char * -__getcwd (char *buf, size_t size) -{ - char *path; - char *result; - -#ifndef NO_ALLOCATION - size_t alloc_size = size; - if (size == 0) - { - if (buf != NULL) - { - __set_errno (EINVAL); - return NULL; - } - - alloc_size = MAX (PATH_MAX, __getpagesize ()); - } - - if (buf == NULL) - { - path = malloc (alloc_size); - if (path == NULL) - return NULL; - } - else -#else -# define alloc_size size -#endif - path = buf; - - int retval; - - retval = INLINE_SYSCALL (getcwd, 2, path, alloc_size); - if (retval >= 0) - { -#ifndef NO_ALLOCATION - if (buf == NULL && size == 0) - /* Ensure that the buffer is only as large as necessary. */ - buf = realloc (path, (size_t) retval); - - if (buf == NULL) - /* Either buf was NULL all along, or `realloc' failed but - we still have the original string. */ - buf = path; -#endif - - return buf; - } - - /* The system call cannot handle paths longer than a page. - Neither can the magic symlink in /proc/self. Just use the - generic implementation right away. */ - if (errno == ENAMETOOLONG) - { -#ifndef NO_ALLOCATION - if (buf == NULL && size == 0) - { - free (path); - path = NULL; - } -#endif - - result = generic_getcwd (path, size); - -#ifndef NO_ALLOCATION - if (result == NULL && buf == NULL && size != 0) - free (path); -#endif - - return result; - } - - /* It should never happen that the `getcwd' syscall failed because - the buffer is too small if we allocated the buffer ourselves - large enough. */ - assert (errno != ERANGE || buf != NULL || size != 0); - -#ifndef NO_ALLOCATION - if (buf == NULL) - free (path); -#endif - - return NULL; -} -weak_alias (__getcwd, getcwd) - -/* Get the code for the generic version. */ -#define GETCWD_RETURN_TYPE static char * internal_function -#define __getcwd generic_getcwd -#include <sysdeps/posix/getcwd.c> |