From: Kay Sievers <kay.sievers@vrfy.org>
Date: Thu, 9 Dec 2010 20:08:19 +0000 (+0100)
Subject: libudev: do not overwrite path with readlink() call
X-Git-Tag: 174~292
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=8ba13ec1cd00b86001b4344aec11ae0a64395f7b

libudev: do not overwrite path with readlink() call
---

diff --git a/libudev/libudev-util.c b/libudev/libudev-util.c
index 030b78cd2..6c309afd0 100644
--- a/libudev/libudev-util.c
+++ b/libudev/libudev-util.c
@@ -26,15 +26,16 @@
 static ssize_t get_sys_link(struct udev *udev, const char *slink, const char *syspath, char *value, size_t size)
 {
 	char path[UTIL_PATH_SIZE];
+	char target[UTIL_PATH_SIZE];
 	ssize_t len;
 	const char *pos;
 
 	util_strscpyl(path, sizeof(path), syspath, "/", slink, NULL);
-	len = readlink(path, path, sizeof(path));
-	if (len <= 0 || len == (ssize_t)sizeof(path))
+	len = readlink(path, target, sizeof(target));
+	if (len <= 0 || len == (ssize_t)sizeof(target))
 		return -1;
-	path[len] = '\0';
-	pos = strrchr(path, '/');
+	target[len] = '\0';
+	pos = strrchr(target, '/');
 	if (pos == NULL)
 		return -1;
 	pos = &pos[1];