From 8d6466a48de5afa3c43bf7174c6adf75efe16883 Mon Sep 17 00:00:00 2001
From: Filipe Brandenburger <filbranden@google.com>
Date: Mon, 11 Apr 2016 21:04:41 +1000
Subject: [PATCH] kill: print usage if no pid is passed in command line

Modication of master line patch 27b2937

Signed-off-by: Craig Small <csmall@enc.com.au>
---
 kill.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kill.c b/kill.c
index 65bb19de..315422b8 100644
--- a/kill.c
+++ b/kill.c
@@ -125,6 +125,9 @@ int main(int argc, char **argv)
     argc -= optind;
     argv += optind;
 
+    if (argc < 1)
+        print_usage(stderr);
+
     for (i = 0; i < argc; i++) {
         pid = strtol_or_err(argv[i], _("failed to parse argument"));
         if (!kill((pid_t) pid, signo))