Move to xreadlink-with-size.c.

diff --git a/lib/xreadlink.c b/lib/xreadlink.c
deleted file mode 100644 (file)
index baea5b9..0000000
--- a/lib/xreadlink.c
+++ /dev/null
@@ -1,105 +0,0 @@
-/* xreadlink.c -- readlink wrapper to return the link name in malloc'd storage
-
-   Copyright (C) 2001, 2003, 2004, 2005, 2006 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 2, 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; see the file COPYING.
-   If not, write to the Free Software Foundation,
-   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
-
-/* Written by Jim Meyering <jim@meyering.net>  */
-
-#include <config.h>
-
-#include "xreadlink.h"
-
-#include <stdio.h>
-#include <errno.h>
-#include <limits.h>
-#include <sys/types.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
-
-/* 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)
-
-#include "xalloc.h"
-
-/* 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, return NULL (caller may use errno to diagnose).
-   If malloc fails, or if the link value is longer than SSIZE_MAX :-),
-   give a diagnostic and exit.  */
-
-char *
-xreadlink (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)
-    {
-      char *buffer = xmalloc (buf_size);
-      ssize_t r = readlink (file, buffer, buf_size);
-      size_t 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
-       xalloc_die ();
-    }
-}