From: Jo-Philipp Wich <jo@mein.io>
Date: Tue, 17 May 2016 15:42:11 +0000 (+0200)
Subject: utils: use O_PATH when opening /dev
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=1418c6ce8559ea125c525c2663105fa5ff14905e;p=project%2Fprocd.git

utils: use O_PATH when opening /dev

Use the O_PATH and O_DIRECTORY flags when opening the "/dev" path for the
subsequent openat() call to ensure that it is indeed a directory.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>
---

diff --git a/utils/utils.c b/utils/utils.c
index ebf5447..e2e3396 100644
--- a/utils/utils.c
+++ b/utils/utils.c
@@ -165,7 +165,7 @@ int patch_fd(const char *device, int fd, int flags)
 		device = "/dev/null";
 
 	if (*device != '/') {
-		dfd = open("/dev", O_RDONLY);
+		dfd = open("/dev", O_PATH|O_DIRECTORY);
 
 		if (dfd < 0)
 			return -1;