reverted spawn

diff --git a/dwm.c b/dwm.c
index b390294..f7b9477 100644 (file)
--- a/dwm.c
+++ b/dwm.c
@@ -182,7 +182,6 @@ static void setlayout(const Arg *arg);
 static void setmfact(const Arg *arg);
 static void setup(void);
 static void showhide(Client *c);
-static void sigchld(int signal);
 static void spawn(const Arg *arg);
 static void tag(const Arg *arg);
 static int textnw(const char *text, unsigned int len);
@@ -1392,24 +1391,22 @@ showhide(Client *c) {
        }
 }
 
-
-void
-sigchld(int signal) {
-       while(0 < waitpid(-1, NULL, WNOHANG));
-}
-
 void
 spawn(const Arg *arg) {
-       signal(SIGCHLD, sigchld);
+       /* The double-fork construct avoids zombie processes and keeps the code
+        * clean from stupid signal handlers. */
        if(fork() == 0) {
-               if(dpy)
-                       close(ConnectionNumber(dpy));
-               setsid();
-               execvp(((char **)arg->v)[0], (char **)arg->v);
-               fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
-               perror(" failed");
+               if(fork() == 0) {
+                       if(dpy)
+                               close(ConnectionNumber(dpy));
+                       setsid();
+                       execvp(((char **)arg->v)[0], (char **)arg->v);
+                       fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
+                       perror(" failed");
+               }
                exit(0);
        }
+       wait(0);
 }
 
 void