From: Emden R. Gansner <erg@alum.mit.edu>
Date: Fri, 27 Feb 2015 18:22:49 +0000 (-0500)
Subject: Report if argument is missing from -o flag
X-Git-Tag: TRAVIS_CI_BUILD_EXPERIMENTAL~118^2~1
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=a3a407ef3157575f13ae602d0c98cf2f235b1431;p=graphviz

Report if argument is missing from -o flag
---

diff --git a/lib/common/input.c b/lib/common/input.c
index f2fd649fd..c79a98e37 100644
--- a/lib/common/input.c
+++ b/lib/common/input.c
@@ -344,6 +344,10 @@ int dotneato_args_initialize(GVC_t * gvc, int argc, char **argv)
 		break;
 	    case 'o':
 		val = getFlagOpt(argc, argv, &i);
+		if (!val) {
+		    fprintf(stderr, "Missing argument for -o flag\n");
+		    return (dotneato_usage(1));
+		}
 		if (! gvc->common.auto_outfile_names)
 		    gvjobs_output_filename(gvc, val);
 		break;