X-Git-Url: https://jasonwoof.com/gitweb/?a=blobdiff_plain;f=util.c;h=91df00b17e6461d0fa7cda22f5c33e62bb253d2f;hb=a50b15a9e9663b1a7ee11d39ddf246427aecaeef;hp=2eb9eb2420ccec6ae1b5e2da1649b960e588ee91;hpb=6a3ae5e26a5cebfd35f2423aec0c47843b5a85be;p=dwm.git

diff --git a/util.c b/util.c
index 2eb9eb2..91df00b 100644
--- a/util.c
+++ b/util.c
@@ -51,12 +51,13 @@ spawn(Arg *arg)
 
 	if(!arg->cmd)
 		return;
+	/* the double-fork construct avoids zombie processes */
 	if(fork() == 0) {
 		if(fork() == 0) {
 			if(dpy)
 				close(ConnectionNumber(dpy));
 			setsid();
-			execl(shell, shell, "-c", arg->cmd, NULL);
+			execl(shell, shell, "-c", arg->cmd, (char *)NULL);
 			fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg->cmd);
 			perror(" failed");
 		}