autofs-5.0.7 - fix fcntl return check

From: Ian Kent <raven@themaw.net>

When checking for FD_CLOEXEC support the return of the fcntl(2) call to

get the file descriptor flags is not checked which could result in an

incorrect result.

---

 include/automount.h |    3 ++-

 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/automount.h b/include/automount.h

index e72fa0d..6ced842 100644

--- a/include/automount.h

+++ b/include/automount.h

@@ -547,7 +547,8 @@ static inline void check_cloexec(int fd)

 {

 	if (cloexec_works == 0) {

 		int fl = fcntl(fd, F_GETFD);

-		cloexec_works = (fl & FD_CLOEXEC) ? 1 : -1;

+		if (fl != -1)

+			cloexec_works = (fl & FD_CLOEXEC) ? 1 : -1;

 	}

 	if (cloexec_works > 0)

 		return;