X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=gnu%2Fareadlink-with-size.c;fp=gnu%2Fareadlink-with-size.c;h=0000000000000000000000000000000000000000;hb=ee168310ec4227174ace489bf5f81f8c2f91cde0;hp=8370184cd533b8c3512b5f11ee7c9c1e6a6def78;hpb=22f1eb8bc17e5be72dd23d42d6aaa60196ac22e6;p=debian%2Ftar
diff --git a/gnu/areadlink-with-size.c b/gnu/areadlink-with-size.c
deleted file mode 100644
index 8370184c..00000000
--- a/gnu/areadlink-with-size.c
+++ /dev/null
@@ -1,106 +0,0 @@
-/* -*- buffer-read-only: t -*- vi: set ro: */
-/* DO NOT EDIT! GENERATED AUTOMATICALLY! */
-/* 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, 2009-2010 Free Software Foundation, Inc.
-
- 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 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
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see . */
-
-/* Written by Jim Meyering */
-
-#include
-
-#include "areadlink.h"
-
-#include
-#include
-#include
-#include
-#include
-
-#ifndef SSIZE_MAX
-# define SSIZE_MAX ((ssize_t) (SIZE_MAX / 2))
-#endif
-
-/* SYMLINK_MAX is used only for an initial memory-allocation sanity
- check, so it's OK to guess too small on hosts where there is no
- arbitrary limit to symbolic link length. */
-#ifndef SYMLINK_MAX
-# define SYMLINK_MAX 1024
-#endif
-
-#define MAXSIZE (SIZE_MAX < SSIZE_MAX ? SIZE_MAX : SSIZE_MAX)
-
-/* Call readlink to get the symbolic link value of FILE.
- SIZE is a hint as to how long the link is expected to be;
- typically it is taken from st_size. It need not be correct.
- Return a pointer to that NUL-terminated string in malloc'd storage.
- If readlink fails, malloc fails, or if the link value is longer
- than SSIZE_MAX, return NULL (caller may use errno to diagnose). */
-
-char *
-areadlink_with_size (char const *file, size_t size)
-{
- /* Some buggy file systems report garbage in st_size. Defend
- against them by ignoring outlandish st_size values in the initial
- memory allocation. */
- 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);
-
- /* The initial buffer size for the link value. */
- size_t buf_size = size < initial_limit ? size + 1 : initial_limit;
-
- while (1)
- {
- ssize_t r;
- size_t link_length;
- char *buffer = malloc (buf_size);
-
- if (buffer == 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. */
- if (r < 0 && errno != ERANGE)
- {
- int saved_errno = errno;
- free (buffer);
- errno = saved_errno;
- return NULL;
- }
-
- if (link_length < buf_size)
- {
- buffer[link_length] = 0;
- return buffer;
- }
-
- free (buffer);
- if (buf_size <= MAXSIZE / 2)
- buf_size *= 2;
- else if (buf_size < MAXSIZE)
- buf_size = MAXSIZE;
- else
- {
- errno = ENOMEM;
- return NULL;
- }
- }
-}