utimens: cache whether utimensat syscall works

[pspp] / lib / areadlink.c

diff --git a/lib/areadlink.c b/lib/areadlink.c
index 1b01d6f8baf6499f484ce4467682910ef2e6630a..f6871c572bd958034653e31423860cf7197d5fc2 100644 (file)
--- a/lib/areadlink.c
+++ b/lib/areadlink.c
@@ -1,12 +1,12 @@
 /* areadlink.c -- 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 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
@@ -14,9 +14,7 @@
    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>
    and Bruno Haible <bruno@clisp.org>.  */
@@ -26,20 +24,23 @@
 /* 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 SIZE_MAX
-# define SIZE_MAX ((size_t) -1)
-#endif
 #ifndef SSIZE_MAX
 # define SSIZE_MAX ((ssize_t) (SIZE_MAX / 2))
 #endif
 
+/* 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 readlink to get the symbolic link value of FILENAME.
    Return a pointer to that NUL-terminated string in malloc'd storage.
    If readlink fails, return NULL and set errno.
@@ -49,17 +50,13 @@
 char *
 areadlink (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)
     {