From 9a9592dceb6f0e4272fe29a22e426edd9092ae74 Mon Sep 17 00:00:00 2001
From: kevlo <kevlo@FreeBSD.org>
Date: Tue, 30 Oct 2007 03:44:10 +0000
Subject: Never use getenv("HOME") without checking for NULL and non-zero

Obtained from: OpenBSD
---
 usr.bin/calendar/io.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'usr.bin/calendar')

diff --git a/usr.bin/calendar/io.c b/usr.bin/calendar/io.c
index e5a0a08..49bfa53 100644
--- a/usr.bin/calendar/io.c
+++ b/usr.bin/calendar/io.c
@@ -337,7 +337,10 @@ opencal(void)
 		    if (!freopen(calendarFile, "r", stdin))
 		        return (NULL);
 		} else {
-		        chdir(getenv("HOME"));
+			char *home = getenv("HOME");
+			if (home == NULL || *home == '\0')
+				errx(1, "cannot get home directory");
+			chdir(home);
 			for (found = i = 0; i < sizeof(calendarHomes) /
 			    sizeof(calendarHomes[0]); i++)
 			    if (chdir(calendarHomes[i]) == 0 &&
-- 
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