From 1d07715ebdf41f293b8de0c027932e71d8360a36 Mon Sep 17 00:00:00 2001
From: Hiltjo Posthuma <hiltjo@codemadness.org>
Date: Tue, 13 Oct 2026 14:42:56 +0200
Subject: print an error if fork failed (resource / process limits)

---
 dwm.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/dwm.c b/dwm.c
index 212c6ba..3f45aab 100644
--- a/dwm.c
+++ b/dwm.c
@@ -1654,10 +1654,16 @@ void
 spawn(const Arg *arg)
 {
 	struct sigaction sa;
+	pid_t pid;
 
 	if (arg->v == dmenucmd)
 		dmenumon[0] = '0' + selmon->num;
-	if (fork() == 0) {
+
+	if ((pid = fork()) == -1) {
+		fprintf(stderr, "dwm: fork failed: %s\n", strerror(errno));
+		return;
+	}
+	if (pid == 0) {
 		if (dpy)
 			close(ConnectionNumber(dpy));
 		setsid();
-- 
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