common/rc: improve checks for YP/NIS

At the 2018 spring NFS BAT, we have a number of systems that return
a valid string from `domainaname`, but don't have the ypcat binary.
If we don't have the yp-tools package installed, we're not going to
be able to use ypcat, so check for it and bail out.

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/common/rc b/common/rc
index 6a91850c53..5dbb8fe5ef 100644
--- a/common/rc
+++ b/common/rc
@@ -2023,7 +2023,8 @@ _yp_active()
 {
 	local dn
 	dn=$(domainname 2>/dev/null)
-	test -n "${dn}" -a "${dn}" != "(none)" -a "${dn}" != "localdomain"
+	local ypcat=$(type -P ypcat)
+	test -n "${dn}" -a "${dn}" != "(none)" -a "${dn}" != "localdomain" -a -n "${ypcat}"
 	echo $?
 }