From 659bdeee2746742c78501ee1a4d32744c728576c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicol=C3=A1s=20A=2E=20Ortega?=
 <deathsbreed@themusicinnoise.net>
Date: Tue, 14 Feb 2017 12:57:11 +0100
Subject: [PATCH] Handle export errors.

---
 src/main.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/main.c b/src/main.c
index 5300ca4..b2c3ce5 100644
--- a/src/main.c
+++ b/src/main.c
@@ -114,7 +114,13 @@ int main(int argc, char *argv[]) {
 		printUsage(argv[0]);
 		return 0;
 	} else if(efile && dfile) {
-		exportPrimes(efile, dfile, base);
+		int err = exportPrimes(efile, dfile, base);
+		if(err) {
+			if(err == 1) fprintf(stderr, "Error: failed to open files.\n");
+			else if(err == 2) fprintf(stderr, "Error: failed to close files.\n");
+			else if(err == 3) fprintf(stderr, "Error: failed to write to export file.\n");
+			return 1;
+		}
 		return 0;
 	}