/* areadlinkat.c -- readlinkat wrapper to return malloc'd link name
Unlike xreadlinkat, only call exit on failure to change directory.
- Copyright (C) 2001, 2003-2007, 2009 Free Software Foundation, Inc.
+ 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
/* Specification. */
#include "areadlink.h"
-#include <string.h>
#include <errno.h>
#include <limits.h>
-#include <sys/types.h>
#include <stdint.h>
#include <stdlib.h>
+#include <string.h>
#include <unistd.h>
#ifndef SSIZE_MAX
#if HAVE_READLINKAT
+/* The initial buffer size for the link value. A power of 2
+ detects arithmetic overflow earlier, but is not required. */
+enum {
+ INITIAL_BUF_SIZE = 1024
+};
+
/* Call readlinkat to get the symbolic link value of FILENAME relative to FD.
Return a pointer to that NUL-terminated string in malloc'd storage.
If readlinkat fails, return NULL and set errno (although failure to
char *
areadlinkat (int fd, char const *filename)
{
- /* The initial buffer size for the link value. A power of 2
- detects arithmetic overflow earlier, but is not required. */
-# define INITIAL_BUF_SIZE 1024
-
/* Allocate the initial buffer on the stack. This way, in the common
case of a symlink of small size, we get away with a single small malloc()
instead of a big malloc() followed by a shrinking realloc(). */
char initial_buf[INITIAL_BUF_SIZE];
char *buffer = initial_buf;
- size_t buf_size = sizeof (initial_buf);
+ size_t buf_size = sizeof initial_buf;
while (1)
{