From 1f1a165ea9104891eb51f84ab07dc4977938024b Mon Sep 17 00:00:00 2001
From: Gregor Beck <gbeck@sernet.de>
Date: Tue, 8 Feb 2011 12:03:08 +0100
Subject: [PATCH] s3:net idmap restore: fix segfault on missing input file

---
 source3/utils/net_idmap.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/source3/utils/net_idmap.c b/source3/utils/net_idmap.c
index 7551354cef0..3f9fa800592 100644
--- a/source3/utils/net_idmap.c
+++ b/source3/utils/net_idmap.c
@@ -190,6 +190,12 @@ static int net_idmap_restore(struct net_context *c, int argc, const char **argv)
 
 	if (argc == 1) {
 		input = fopen(argv[0], "r");
+		if (input == NULL) {
+			d_fprintf(stderr, _("Could not open input file (%s): %s\n"),
+				  argv[0], strerror(errno));
+			ret = -1;
+			goto done;
+		}
 	} else {
 		input = stdin;
 	}