From cdbf6a42292d3d49a9d32edf49cdb32f7bb56fdb Mon Sep 17 00:00:00 2001
From: Leah Neukirchen <leah@vuxu.org>
Date: Mon, 17 Sep 2018 12:55:54 +0200
Subject: pwait: exit with status 1 if no valid pid is given

---
 pwait.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pwait.c b/pwait.c
index 15b4904..2ed699c 100644
--- a/pwait.c
+++ b/pwait.c
@@ -187,6 +187,9 @@ usage:
 		pids[m++] = pid;
 	}
 
+	if (m == 0)
+		exit(1);
+
 	sk_nl = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR);
 	if (sk_nl == -1) {
 		perror("socket sk_nl error");
-- 
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