From b812c4c40627809d92d7cb4b3de1059066399380 Mon Sep 17 00:00:00 2001 From: Laszlo Papp Date: Wed, 9 Mar 2011 18:01:30 +0200 Subject: [PATCH] Check the return value after an open syscall --- lib/mount_util.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/lib/mount_util.c b/lib/mount_util.c index 5b660d6..aafddfb 100644 --- a/lib/mount_util.c +++ b/lib/mount_util.c @@ -100,8 +100,10 @@ static int add_mount(const char *progname, const char *fsname, * --no-canonicalize */ int fd = open("/dev/null", O_WRONLY); - dup2(fd, 1); - dup2(fd, 2); + if (fd >= 0) { + dup2(fd, 1); + dup2(fd, 2); + } sigprocmask(SIG_SETMASK, &oldmask, NULL); setuid(geteuid()); -- 2.30.2