/* readlink wrapper to return the link name in malloc'd storage.
Unlike xreadlink and xreadlink_with_size, don't ever call exit.
- Copyright (C) 2001, 2003-2007 Free Software Foundation, Inc.
+ Copyright (C) 2001, 2003-2007, 2009-2012 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; see the file COPYING.
- If not, write to the Free Software Foundation,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Written by Jim Meyering <jim@meyering.net> */
#include "areadlink.h"
-#include <stdio.h>
#include <errno.h>
#include <limits.h>
-#include <sys/types.h>
+#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
-#ifndef SIZE_MAX
-# define SIZE_MAX ((size_t) -1)
-#endif
#ifndef SSIZE_MAX
# define SSIZE_MAX ((ssize_t) (SIZE_MAX / 2))
#endif
size_t symlink_max = SYMLINK_MAX;
size_t INITIAL_LIMIT_BOUND = 8 * 1024;
size_t initial_limit = (symlink_max < INITIAL_LIMIT_BOUND
- ? symlink_max + 1
- : INITIAL_LIMIT_BOUND);
+ ? symlink_max + 1
+ : INITIAL_LIMIT_BOUND);
/* The initial buffer size for the link value. */
size_t buf_size = size < initial_limit ? size + 1 : initial_limit;
char *buffer = malloc (buf_size);
if (buffer == NULL)
- return NULL;
+ return NULL;
r = readlink (file, buffer, buf_size);
link_length = r;
/* On AIX 5L v5.3 and HP-UX 11i v2 04/09, readlink returns -1
- with errno == ERANGE if the buffer is too small. */
+ with errno == ERANGE if the buffer is too small. */
if (r < 0 && errno != ERANGE)
- {
- int saved_errno = errno;
- free (buffer);
- errno = saved_errno;
- return NULL;
- }
+ {
+ int saved_errno = errno;
+ free (buffer);
+ errno = saved_errno;
+ return NULL;
+ }
if (link_length < buf_size)
- {
- buffer[link_length] = 0;
- return buffer;
- }
+ {
+ buffer[link_length] = 0;
+ return buffer;
+ }
free (buffer);
if (buf_size <= MAXSIZE / 2)
- buf_size *= 2;
+ buf_size *= 2;
else if (buf_size < MAXSIZE)
- buf_size = MAXSIZE;
+ buf_size = MAXSIZE;
else
- {
- errno = ENOMEM;
- return NULL;
- }
+ {
+ errno = ENOMEM;
+ return NULL;
+ }
}
}