From 5f23ba4ac9c938fa6971ae07301cf120e1d45895 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Axel=20D=C3=B6rfler?= <axeld@pinc-software.de>
Date: Sat, 8 Dec 2007 21:45:40 +0000
Subject: [PATCH] If either the path or the resolved path is NULL, realpath()
 now returns EINVAL. This also fixes bug #1659.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23087 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 src/system/libroot/posix/stdlib/realpath.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/system/libroot/posix/stdlib/realpath.c b/src/system/libroot/posix/stdlib/realpath.c
index 8c5a3187da..5b4b93a12f 100644
--- a/src/system/libroot/posix/stdlib/realpath.c
+++ b/src/system/libroot/posix/stdlib/realpath.c
@@ -58,6 +58,11 @@ realpath(const char *path, char *resolved)
 	char *p, *q, wbuf[MAXPATHLEN];
 	int symlinks = 0;
 
+	if (path == NULL || resolved == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+
 	/* Save the starting point. */
 	if ((fd = open(".", O_RDONLY)) < 0) {
 		strcpy(resolved, ".");