From 1eb0537302312cf76715af50659086ff33fea29e Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Thu, 7 Apr 2016 10:47:46 -0700
Subject: [PATCH] Warn if temporary directory doesn't begin with /

---
 geojson.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/geojson.c b/geojson.c
index eb894815..9db675a6 100644
--- a/geojson.c
+++ b/geojson.c
@@ -2573,6 +2573,9 @@ int main(int argc, char **argv) {
 
 		case 't':
 			tmpdir = optarg;
+			if (tmpdir[0] != '/') {
+				fprintf(stderr, "Warning: temp directory %s doesn't begin with /\n", tmpdir);
+			}
 			break;
 
 		case 'g':