From 07ce96a3a0f4a650933f5f586082cbf2064ea2c1 Mon Sep 17 00:00:00 2001
From: Jochen Sprickerhof <dwm@jochen.sprickerhof.de>
Date: Wed, 22 Apr 2015 17:22:34 +0200
Subject: [PATCH] Fix sigchld

Only wait for termination of the shell.
---
 st.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/st.c b/st.c
index d954288..300cab6 100644
--- a/st.c
+++ b/st.c
@@ -1238,10 +1238,14 @@ execsh(void) {
 void
 sigchld(int a) {
 	int stat, ret;
+	pid_t p;
 
-	if(waitpid(pid, &stat, 0) < 0)
+	if((p = waitpid(pid, &stat, WNOHANG)) < 0)
 		die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
 
+	if(pid != p)
+		return;
+
 	ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
 	if (ret != EXIT_SUCCESS)
 		die("child finished with error '%d'\n", stat);