From b553349251e3904601f4c535e2f5b0911450da88 Mon Sep 17 00:00:00 2001
From: sin <sin@2f30.org>
Date: Fri, 6 Nov 2015 10:51:04 +0000
Subject: [PATCH] env: Check unsetenv() return value

./env -u "" foo and ./env -u "A=123" foo should both fail.
---
 env.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/env.c b/env.c
index 4da2630..5d7e8a5 100644
--- a/env.c
+++ b/env.c
@@ -25,7 +25,8 @@ main(int argc, char *argv[])
 		*environ = NULL;
 		break;
 	case 'u':
-		unsetenv(EARGF(usage()));
+		if (unsetenv(EARGF(usage())) < 0)
+			eprintf("unsetenv:");
 		break;
 	default:
 		usage();