From 1955fc20d88d420406dd36a231431cd3410d7d53 Mon Sep 17 00:00:00 2001
From: Matt Strapp <strap012@umn.edu>
Date: Mon, 26 Oct 2020 08:28:06 -0500
Subject: Add error checking

---
 P2/lib/utils.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'P2/lib')

diff --git a/P2/lib/utils.c b/P2/lib/utils.c
index 5a5a09d..603a699 100644
--- a/P2/lib/utils.c
+++ b/P2/lib/utils.c
@@ -8,7 +8,7 @@ char *getChunkData(int mapperID) {
 	int mid;
 	//Queue Key
 	key_t key = 10;
-	mid = msgget(key, 0666);
+	mid = msgget(key, 0666 | IPC_CREAT);
 	if (mid < 0) {
 		perror("Cannot open queue.\n");
 		return NULL;
@@ -30,6 +30,10 @@ void sendChunkData(char *inputFile, int nMappers) {
 
 	// open message queue
 	msgid = msgget(key, 0666 | IPC_CREAT);
+	if (msgid < 0) {
+		perror("Cannot open queue.\n");
+		exit(-1);
+	}
 	// message.msgText = 1;
 	FILE *fptr = fopen(inputFile, "r");
 
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