From 26606098c2eb57d288b2e0edca471c71d0d7fa51 Mon Sep 17 00:00:00 2001
From: Carmelo Amoroso <carmelo.amoroso@st.com>
Date: Thu, 16 Sep 2010 12:22:34 +0200
Subject: libc: Add canonicalize_file_name function

Add canonicalize_file_name function and its related tests.
Required by elfutils and coreutils (readlink).

Signed-off-by: Salvatore Cro <salvatore.cro@st.com>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
---
 libc/stdlib/Makefile.in    |  2 +-
 libc/stdlib/canonicalize.c | 38 ++++++++++++++++++++++++++++++++++++++
 libc/stdlib/realpath.c     |  1 +
 3 files changed, 40 insertions(+), 1 deletion(-)
 create mode 100644 libc/stdlib/canonicalize.c

(limited to 'libc/stdlib')

diff --git a/libc/stdlib/Makefile.in b/libc/stdlib/Makefile.in
index 0f174eea5..760ccf7e6 100644
--- a/libc/stdlib/Makefile.in
+++ b/libc/stdlib/Makefile.in
@@ -12,7 +12,7 @@ include $(top_srcdir)libc/stdlib/malloc-simple/Makefile.in
 include $(top_srcdir)libc/stdlib/malloc-standard/Makefile.in
 
 CSRC-y := \
-	abort.c getenv.c mkdtemp.c realpath.c mkstemp.c \
+	abort.c getenv.c mkdtemp.c realpath.c canonicalize.c mkstemp.c \
 	rand.c random.c random_r.c setenv.c div.c ldiv.c lldiv.c \
 	getpt.c drand48-iter.c jrand48.c \
 	jrand48_r.c lrand48.c lrand48_r.c mrand48.c mrand48_r.c nrand48.c \
diff --git a/libc/stdlib/canonicalize.c b/libc/stdlib/canonicalize.c
new file mode 100644
index 000000000..06e710ab7
--- /dev/null
+++ b/libc/stdlib/canonicalize.c
@@ -0,0 +1,38 @@
+/*
+ * 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
diff --git a/libc/stdlib/realpath.c b/libc/stdlib/realpath.c
index 80c25f098..cf9d45fa2 100644
--- a/libc/stdlib/realpath.c
+++ b/libc/stdlib/realpath.c
@@ -159,3 +159,4 @@ char *realpath(const char *path, char got_path[])
 	*new_path = '\0';
 	return got_path;
 }
+libc_hidden_def(realpath)
-- 
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