File 0001-conffile-ignore-empty-environment-variables.patch of Package nfs-utils

From 5ec9d9034650ae4372dc1bd44d33a1e8768e3409 Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.com>
Date: Wed, 8 Feb 2017 08:18:34 +1100
Subject: [PATCH] conffile: ignore empty environment variables.

conf_set() already refuses to set an empty value, so if
  foo=
appear in the config file, it will be ignored.
This patch extends the policy to environment variables, so empty
environment variables are treats as though they didn't exist.

This means that a separate environment file (e.g. /etc/sysconfig/nfs)
will be treated the same way whether it is:
 - included in the [environment] section of /etc/nfs.conf
 - sourced by the shell before running code
 - sourced by the systemd EnvironmentFile directive.

Signed-off-by: NeilBrown <neilb@suse.com>
---
 support/nfs/conffile.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/support/nfs/conffile.c b/support/nfs/conffile.c
index e717c1e39bab..203efd2aa602 100644
--- a/support/nfs/conffile.c
+++ b/support/nfs/conffile.c
@@ -533,7 +533,7 @@ retry:
 				 * or from environment
 				 */
 				char *env = getenv(cb->value+1);
-				if (env)
+				if (env && *env)
 					return env;
 				section = "environment";
 				tag = cb->value + 1;
-- 
2.11.0