__END_NAMESPACE_STD
-#if 0 /* def __USE_GNU */
+#ifdef __USE_GNU
/* Return a malloc'd string containing the canonical absolute name of the
existing named file. */
extern char *canonicalize_file_name (__const char *__name)
__THROW __nonnull ((1)) __wur;
#endif
-/* Return the canonical absolute name of file NAME. If RESOLVED is
- null, the result is malloc'd; otherwise, if the canonical name is
- PATH_MAX chars or more, returns null with `errno' set to
- ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars,
- returns the name in RESOLVED. */
+/* Return the canonical absolute name of file NAME. If the
+ canonical name is PATH_MAX chars or more, returns null
+ with `errno' set to ENAMETOOLONG; if the name fits in
+ fewer than PATH_MAX chars, returns the name in RESOLVED. */
/* we choose to handle __resolved==NULL as crash :) */
extern char *realpath (__const char *__restrict __name,
char *__restrict __resolved) __THROW __wur;
-
+libc_hidden_proto(realpath)
/* Shorthand for type of comparison functions. */
#ifndef __COMPAR_FN_T
--- /dev/null
+/*
+ * canonicalize.c -- Return a malloc'd string containing the canonical
+ * absolute name of the named file. The last file name component need
+ * not exist, and may be a symlink to a nonexistent file.
+ * Copyright (C) 2009 STMicroelectronics
+ * Author: Salvatore Cro <salvatore.cro@st.com>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <stdlib.h>
+#include <limits.h>
+
+#ifdef __USE_GNU
+
+#ifndef PATH_MAX
+# ifdef _POSIX_VERSION
+# define PATH_MAX _POSIX_PATH_MAX
+# else
+# ifdef MAXPATHLEN
+# define PATH_MAX MAXPATHLEN
+# else
+# define PATH_MAX 1024
+# endif
+# endif
+#endif
+
+char * canonicalize_file_name (const char *name)
+{
+ char *buf = (char *) malloc(PATH_MAX);
+
+ if(unlikely(buf == NULL))
+ return NULL;
+
+ *buf='\0';
+ return realpath (name, buf);
+}
+#endif
--- /dev/null
+/* Test for realpath/canonicalize function.
+ Copyright (C) 1998 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <errno.h>
+#include <string.h>
+
+
+/* Prototype for our test function. */
+extern void do_prepare (int argc, char *argv[]);
+extern int do_test (int argc, char *argv[]);
+
+/* We have a preparation function. */
+#define PREPARE do_prepare
+
+#include <test-skeleton.c>
+
+/* Name of the temporary files we create. */
+char *name1;
+char *name2;
+
+/* Preparation. */
+void
+do_prepare (int argc, char *argv[])
+{
+ size_t test_dir_len;
+
+ test_dir_len = strlen (test_dir);
+
+ /* Generate the circular symlinks. */
+ name1 = malloc (test_dir_len + sizeof ("/canonXXXXXX"));
+ mempcpy (mempcpy (name1, test_dir, test_dir_len),
+ "/canonXXXXXX", sizeof ("/canonXXXXXX"));
+ name2 = strdup (name1);
+
+ add_temp_file (mktemp (name1));
+ add_temp_file (mktemp (name2));
+}
+
+
+/* Run the test. */
+int
+do_test (int argc, char *argv[])
+{
+ char *canon;
+
+ printf ("create symlinks from %s to %s and vice versa\n", name1, name2);
+ if (symlink (name1, name2) == -1
+ || symlink (name2, name1) == -1)
+ /* We cannot test this. */
+ return 0;
+
+ /* Call the function. This is equivalent the using `realpath' but the
+ function allocates the room for the result. */
+ errno = 0;
+ canon = canonicalize_file_name (name1);
+
+ return canon != NULL || errno != ELOOP;
+}