From 211a398a8ab28b94456e716c8647d6ee248731d0 Mon Sep 17 00:00:00 2001
From: jxnshi <jxnshi@proton.me>
Date: Sat, 25 Jan 2025 20:57:25 +0100
Subject: [PATCH] Add cool autostart

---
 config.def.h |  5 ++++
 dwm.c        | 67 +++++++++++++++++++++++++++++++++++++++++++++-------
 2 files changed, 63 insertions(+), 9 deletions(-)

diff --git a/config.def.h b/config.def.h
index 88002bf..b5c72ca 100644
--- a/config.def.h
+++ b/config.def.h
@@ -19,6 +19,11 @@ static const char *colors[][3]      = {
 	[SchemeSel]  = { col_gray4, col_cyan,  col_cyan  },
 };
 
+static const char *const autostart[] = {
+	"slstatus", NULL,
+	NULL /* terminate */
+};
+
 /* tagging */
 static const char *tags[] = { "1", "2", "3", "4", "5", "6", "7", "8", "9" };
 
diff --git a/dwm.c b/dwm.c
index 21ac013..7d61022 100644
--- a/dwm.c
+++ b/dwm.c
@@ -193,7 +193,6 @@ static void resizeclient(Client *c, int x, int y, int w, int h);
 static void resizemouse(const Arg *arg);
 static void restack(Monitor *m);
 static void run(void);
-static void runAutostart(void);
 static void scan(void);
 static int sendevent(Client *c, Atom proto);
 static void sendmon(Client *c, Monitor *m);
@@ -233,6 +232,7 @@ static int xerror(Display *dpy, XErrorEvent *ee);
 static int xerrordummy(Display *dpy, XErrorEvent *ee);
 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 static void zoom(const Arg *arg);
+static void autostart_exec(void);
 
 /* variables */
 static const char broken[] = "broken";
@@ -274,6 +274,34 @@ static Window root, wmcheckwin;
 /* compile-time check if all tags fit into an unsigned int bit array. */
 struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
 
+/* dwm will keep pid's of processes from autostart array and kill them at quit */
+static pid_t *autostart_pids;
+static size_t autostart_len;
+
+/* execute command from autostart array */
+static void
+autostart_exec() {
+	const char *const *p;
+	size_t i = 0;
+
+	/* count entries */
+	for (p = autostart; *p; autostart_len++, p++)
+		while (*++p);
+
+	autostart_pids = malloc(autostart_len * sizeof(pid_t));
+	for (p = autostart; *p; i++, p++) {
+		if ((autostart_pids[i] = fork()) == 0) {
+			setsid();
+			execvp(*p, (char *const *)p);
+			fprintf(stderr, "dwm: execvp %s\n", *p);
+			perror(" failed");
+			_exit(EXIT_FAILURE);
+		}
+		/* skip arguments */
+		while (*++p);
+	}
+}
+
 /* function implementations */
 void
 applyrules(Client *c)
@@ -1258,6 +1286,16 @@ propertynotify(XEvent *e)
 void
 quit(const Arg *arg)
 {
+	size_t i;
+
+	/* kill child processes */
+	for (i = 0; i < autostart_len; i++) {
+		if (0 < autostart_pids[i]) {
+			kill(autostart_pids[i], SIGTERM);
+			waitpid(autostart_pids[i], NULL, 0);
+		}
+	}
+
 	running = 0;
 }
 
@@ -1390,12 +1428,6 @@ run(void)
 			handler[ev.type](&ev); /* call handler */
 }
 
-void
-runAutostart(void) {
-	system("cd ~/.dwm; ./autostart_blocking.sh");
-	system("cd ~/.dwm; ./autostart.sh &");
-}
-
 void
 scan(void)
 {
@@ -1556,8 +1588,25 @@ setup(void)
 	sa.sa_handler = SIG_IGN;
 	sigaction(SIGCHLD, &sa, NULL);
 
+	pid_t pid;
+
 	/* clean up any zombies (inherited from .xinitrc etc) immediately */
-	while (waitpid(-1, NULL, WNOHANG) > 0);
+
+	while (0 < (pid = waitpid(-1, NULL, WNOHANG))) {
+		pid_t *p, *lim;
+
+		if (!(p = autostart_pids))
+			continue;
+		lim = &p[autostart_len];
+
+		for (; p < lim; p++) {
+			if (*p == pid) {
+				*p = -1;
+				break;
+			}
+		}
+
+	}
 
 	/* init screen */
 	screen = DefaultScreen(dpy);
@@ -2189,6 +2238,7 @@ main(int argc, char *argv[])
 	if (!(dpy = XOpenDisplay(NULL)))
 		die("dwm: cannot open display");
 	checkotherwm();
+	autostart_exec();
 	setup();
 #ifdef __OpenBSD__
 	if (pledge("stdio rpath proc exec", NULL) == -1)
@@ -2196,7 +2246,6 @@ main(int argc, char *argv[])
 #endif /* __OpenBSD__ */
 	scan();
 	run();
-	runAutostart();
 	cleanup();
 	XCloseDisplay(dpy);
 	return EXIT_SUCCESS;
-- 
2.49.0