*** empty log message ***

diff --git a/lib/ChangeLog b/lib/ChangeLog
index 5a1d269..418263f 100644 (file)
--- a/lib/ChangeLog
+++ b/lib/ChangeLog
@@ -1,5 +1,9 @@
 2001-09-01  Jim Meyering  <meyering@lucent.com>
 
+       * xreadlink.c: New file.
+       * xreadlink.h: New file.
+       * Makefile.am (libfetish_a_SOURCES): Add xreadlink.c and xreadlink.h.
+
        * regex.c (uintptr_t) [!_LIBC]: Define to private_uintptr_t, so it
        doesn't conflict with sparc-sun-solaris2.7's definition in
        /usr/include/sys/int_types.h.

diff --git a/lib/xreadlink.c b/lib/xreadlink.c
new file mode 100644 (file)
index 0000000..333551f
--- /dev/null
+++ b/lib/xreadlink.c
@@ -0,0 +1,72 @@
+/* exclude.c -- exclude file names
+
+   Copyright 2001 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,
+   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+/* Written by Jim Meyering <jim@meyering.net>  */
+
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdio.h>
+#if HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+#if HAVE_STDLIB_H
+# include <stdlib.h>
+#endif
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+#include "xalloc.h"
+#include "xreadlink.h"
+
+/* 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 (use errno to diagnose).
+   If realloc fails, or if the link value is longer than SIZE_MAX :-),
+   give a diagnostic and exit.  */
+
+char *
+xreadlink (char const *filename, size_t *link_length_arg)
+{
+  size_t buf_size = 128;  /* must be a power of 2 */
+  char *buffer = NULL;
+
+  while (1)
+    {
+      int link_length;
+      buffer = (char *) xrealloc (buffer, buf_size);
+      link_length = readlink (filename, buffer, buf_size);
+      if (link_length < 0)
+       {
+         free (buffer);
+         return NULL;
+       }
+      if (link_length < buf_size)
+       {
+         *link_length_arg = link_length;
+         buffer[link_length] = 0;
+         return buffer;
+       }
+      buf_size *= 2;
+      if (buf_size == 0)
+       xalloc_die ();
+    }
+}

diff --git a/lib/xreadlink.h b/lib/xreadlink.h
new file mode 100644 (file)
index 0000000..4fe13ab
--- /dev/null
+++ b/lib/xreadlink.h
@@ -0,0 +1,9 @@
+#ifndef PARAMS
+# if defined PROTOTYPES || (defined __STDC__ && __STDC__)
+#  define PARAMS(Args) Args
+# else
+#  define PARAMS(Args) ()
+# endif
+#endif
+
+char *xreadlink PARAMS ((char const *, size_t *));