From: Laszlo Papp <ext-laszlo.papp@nokia.com>
Date: Tue, 15 Mar 2011 08:33:08 +0000 (+0200)
Subject: Check the return value properly before passing it to any function
X-Git-Tag: fuse_2_9_0~64
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=61aff393dc414ae6650ba24a1012be0e7bcec5a0;p=qemu-gpiodev%2Flibfuse.git

Check the return value properly before passing it to any function
---

diff --git a/util/ulockmgr_server.c b/util/ulockmgr_server.c
index 8ffdfef..583fcf9 100644
--- a/util/ulockmgr_server.c
+++ b/util/ulockmgr_server.c
@@ -366,8 +366,10 @@ int main(int argc, char *argv[])
 	}
 	cfd = 4;
 	nullfd = open("/dev/null", O_RDWR);
-	dup2(nullfd, 0);
-	dup2(nullfd, 1);
+	if (nullfd >= 0) {
+		dup2(nullfd, 0);
+		dup2(nullfd, 1);
+	}
 	close(3);
 	closefrom(5);
 	while (1) {