patch restoreafterrestart

config.def.h

@@ -1,5 +1,7 @@
 /* See LICENSE file for copyright and license details. */
 
+#define SESSION_FILE "/tmp/dwm-session"
+
 /* appearance */
 static unsigned int borderpx  = 6;        /* border pixel of windows */
 static const unsigned int gappx = 10;        /* gaps between windows */
@@ -98,6 +100,7 @@ static const Key keys[] = {
 	TAGKEYS(                        XK_8,                      7)
 	TAGKEYS(                        XK_9,                      8)
 	{ MODKEY|ShiftMask,             XK_q,      quit,           {0} },
+	{ MODKEY|ControlMask|ShiftMask, XK_q,      quit,           {1} }, 
 };
 
 /* button definitions */

dwm.1

@@ -142,6 +142,9 @@ Add/remove all windows with nth tag to/from the view.
 .TP
 .B Mod1\-Shift\-q
 Quit dwm.
+.TP
+.B Mod1\-Control\-Shift\-q
+Restart dwm.
 .SS Mouse commands
 .TP
 .B Mod1\-Button1
@@ -155,6 +158,13 @@ Resize focused window while dragging. Tiled windows will be toggled to the float
 .SH CUSTOMIZATION
 dwm is customized by creating a custom config.h and (re)compiling the source
 code. This keeps it fast, secure and simple.
+.SH SIGNALS
+.TP
+.B SIGHUP - 1
+Restart the dwm process.
+.TP
+.B SIGTERM - 15
+Cleanly terminate the dwm process.
 .SH SEE ALSO
 .BR dmenu (1),
 .BR st (1)

dwm.c

@@ -207,6 +207,8 @@ static void setmfact(const Arg *arg);
 static void setup(void);
 static void seturgent(Client *c, int urg);
 static void showhide(Client *c);
+static void sighup(int unused);
+static void sigterm(int unused);
 static void spawn(const Arg *arg);
 static void tag(const Arg *arg);
 static void tagmon(const Arg *arg);
@@ -262,6 +264,7 @@ static void (*handler[LASTEvent]) (XEvent *) = {
 	[UnmapNotify] = unmapnotify
 };
 static Atom wmatom[WMLast], netatom[NetLast];
+static int restart = 0;
 static int running = 1;
 static Cur *cursor[CurLast];
 static Clr **scheme;
@@ -1258,10 +1261,63 @@ propertynotify(XEvent *e)
 	}
 }
 
+void
+saveSession(void)
+{
+	FILE *fw = fopen(SESSION_FILE, "w");
+	for (Client *c = selmon->clients; c != NULL; c = c->next) { // get all the clients with their tags and write them to the file
+		fprintf(fw, "%lu %u\n", c->win, c->tags);
+	}
+	fclose(fw);
+}
+
+void
+restoreSession(void)
+{
+	// restore session
+	FILE *fr = fopen(SESSION_FILE, "r");
+	if (!fr)
+		return;
+
+	char *str = malloc(23 * sizeof(char)); // allocate enough space for excepted input from text file
+	while (fscanf(fr, "%[^\n] ", str) != EOF) { // read file till the end
+		long unsigned int winId;
+		unsigned int tagsForWin;
+		int check = sscanf(str, "%lu %u", &winId, &tagsForWin); // get data
+		if (check != 2) // break loop if data wasn't read correctly
+			break;
+		
+		for (Client *c = selmon->clients; c ; c = c->next) { // add tags to every window by winId
+			if (c->win == winId) {
+				c->tags = tagsForWin;
+				break;
+			}
+		}
+    }
+
+	for (Client *c = selmon->clients; c ; c = c->next) { // refocus on windows
+		focus(c);
+		restack(c->mon);
+	}
+
+	for (Monitor *m = selmon; m; m = m->next) // rearrange all monitors
+		arrange(m);
+
+	free(str);
+	fclose(fr);
+	
+	// delete a file
+	remove(SESSION_FILE);
+}
+
 void
 quit(const Arg *arg)
 {
+	if(arg->i) restart = 1;
 	running = 0;
+
+	if (restart == 1)
+		saveSession();
 }
 
 Monitor *
@@ -1566,6 +1622,9 @@ setup(void)
 	/* clean up any zombies (inherited from .xinitrc etc) immediately */
 	while (waitpid(-1, NULL, WNOHANG) > 0);
 
+	signal(SIGHUP, sighup);
+	signal(SIGTERM, sigterm);
+
 	/* init screen */
 	screen = DefaultScreen(dpy);
 	sw = DisplayWidth(dpy, screen);
@@ -1657,6 +1716,20 @@ showhide(Client *c)
 	}
 }
 
+void
+sighup(int unused)
+{
+	Arg a = {.i = 1};
+	quit(&a);
+}
+
+void
+sigterm(int unused)
+{
+	Arg a = {.i = 0};
+	quit(&a);
+}
+
 void
 spawn(const Arg *arg)
 {
@@ -2171,7 +2244,9 @@ main(int argc, char *argv[])
 		die("pledge");
 #endif /* __OpenBSD__ */
 	scan();
+	restoreSession();
 	run();
+	if(restart) execvp(argv[0], argv);
 	cleanup();
 	XCloseDisplay(dpy);
 	return EXIT_SUCCESS;

patches/dwm-restartsig-20180523-6.2.diff

@@ -0,0 +1,139 @@
+From 2991f37f0aaf44b9f9b11e7893ff0af8eb88f649 Mon Sep 17 00:00:00 2001
+From: Christopher Drelich <cd@cdrakka.com>
+Date: Wed, 23 May 2018 22:50:38 -0400
+Subject: [PATCH] Modifies quit to handle restarts and adds SIGHUP and SIGTERM
+ handlers.
+
+Modified quit() to restart if it receives arg .i = 1
+MOD+CTRL+SHIFT+Q was added to confid.def.h to do just that.
+
+Signal handlers were handled for SIGHUP and SIGTERM.
+If dwm receives these signals it calls quit() with
+arg .i = to 1 or 0, respectively.
+
+To restart dwm:
+MOD+CTRL+SHIFT+Q
+or
+kill -HUP dwmpid
+
+To quit dwm cleanly:
+MOD+SHIFT+Q
+or
+kill -TERM dwmpid
+---
+ config.def.h |  1 +
+ dwm.1        | 10 ++++++++++
+ dwm.c        | 22 ++++++++++++++++++++++
+ 3 files changed, 33 insertions(+)
+
+diff --git a/config.def.h b/config.def.h
+index a9ac303..e559429 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -94,6 +94,7 @@ static Key keys[] = {
+ 	TAGKEYS(                        XK_8,                      7)
+ 	TAGKEYS(                        XK_9,                      8)
+ 	{ MODKEY|ShiftMask,             XK_q,      quit,           {0} },
++	{ MODKEY|ControlMask|ShiftMask, XK_q,      quit,           {1} }, 
+ };
+ 
+ /* button definitions */
+diff --git a/dwm.1 b/dwm.1
+index 13b3729..36a331c 100644
+--- a/dwm.1
++++ b/dwm.1
+@@ -142,6 +142,9 @@ Add/remove all windows with nth tag to/from the view.
+ .TP
+ .B Mod1\-Shift\-q
+ Quit dwm.
++.TP
++.B Mod1\-Control\-Shift\-q
++Restart dwm.
+ .SS Mouse commands
+ .TP
+ .B Mod1\-Button1
+@@ -155,6 +158,13 @@ Resize focused window while dragging. Tiled windows will be toggled to the float
+ .SH CUSTOMIZATION
+ dwm is customized by creating a custom config.h and (re)compiling the source
+ code. This keeps it fast, secure and simple.
++.SH SIGNALS
++.TP
++.B SIGHUP - 1
++Restart the dwm process.
++.TP
++.B SIGTERM - 15
++Cleanly terminate the dwm process.
+ .SH SEE ALSO
+ .BR dmenu (1),
+ .BR st (1)
+diff --git a/dwm.c b/dwm.c
+index bb95e26..286eecd 100644
+--- a/dwm.c
++++ b/dwm.c
+@@ -205,6 +205,8 @@ static void setup(void);
+ static void seturgent(Client *c, int urg);
+ static void showhide(Client *c);
+ static void sigchld(int unused);
++static void sighup(int unused);
++static void sigterm(int unused);
+ static void spawn(const Arg *arg);
+ static void tag(const Arg *arg);
+ static void tagmon(const Arg *arg);
+@@ -260,6 +262,7 @@ static void (*handler[LASTEvent]) (XEvent *) = {
+ 	[UnmapNotify] = unmapnotify
+ };
+ static Atom wmatom[WMLast], netatom[NetLast];
++static int restart = 0;
+ static int running = 1;
+ static Cur *cursor[CurLast];
+ static Clr **scheme;
+@@ -1248,6 +1251,7 @@ propertynotify(XEvent *e)
+ void
+ quit(const Arg *arg)
+ {
++	if(arg->i) restart = 1;
+ 	running = 0;
+ }
+ 
+@@ -1536,6 +1540,9 @@ setup(void)
+ 	/* clean up any zombies immediately */
+ 	sigchld(0);
+ 
++	signal(SIGHUP, sighup);
++	signal(SIGTERM, sigterm);
++
+ 	/* init screen */
+ 	screen = DefaultScreen(dpy);
+ 	sw = DisplayWidth(dpy, screen);
+@@ -1637,6 +1644,20 @@ sigchld(int unused)
+ }
+ 
+ void
++sighup(int unused)
++{
++	Arg a = {.i = 1};
++	quit(&a);
++}
++
++void
++sigterm(int unused)
++{
++	Arg a = {.i = 0};
++	quit(&a);
++}
++
++void
+ spawn(const Arg *arg)
+ {
+ 	if (arg->v == dmenucmd)
+@@ -2139,6 +2160,7 @@ main(int argc, char *argv[])
+ 	setup();
+ 	scan();
+ 	run();
++	if(restart) execvp(argv[0], argv);
+ 	cleanup();
+ 	XCloseDisplay(dpy);
+ 	return EXIT_SUCCESS;
+-- 
+2.7.4
+

patches/dwm-restoreafterrestart-20220709-d3f93c7.diff

@@ -0,0 +1,101 @@
+From 9fd4a02b57aa8a764d8105d5f2f854372f4ef559 Mon Sep 17 00:00:00 2001
+From: ViliamKovac1223 <viliamkovac1223@gmail.com>
+Date: Sat, 9 Jul 2022 17:35:54 +0200
+Subject: [PATCH] add restore patch
+
+---
+ config.def.h |  2 ++
+ dwm.c        | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 55 insertions(+)
+
+diff --git a/config.def.h b/config.def.h
+index 6ec4146..0b91976 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -1,5 +1,7 @@
+ /* See LICENSE file for copyright and license details. */
+ 
++#define SESSION_FILE "/tmp/dwm-session"
++
+ /* appearance */
+ static const unsigned int borderpx  = 1;        /* border pixel of windows */
+ static const unsigned int snap      = 32;       /* snap pixel */
+diff --git a/dwm.c b/dwm.c
+index 74cec7e..76b40a2 100644
+--- a/dwm.c
++++ b/dwm.c
+@@ -1255,11 +1255,63 @@ propertynotify(XEvent *e)
+ 	}
+ }
+ 
++void
++saveSession(void)
++{
++	FILE *fw = fopen(SESSION_FILE, "w");
++	for (Client *c = selmon->clients; c != NULL; c = c->next) { // get all the clients with their tags and write them to the file
++		fprintf(fw, "%lu %u\n", c->win, c->tags);
++	}
++	fclose(fw);
++}
++
++void
++restoreSession(void)
++{
++	// restore session
++	FILE *fr = fopen(SESSION_FILE, "r");
++	if (!fr)
++		return;
++
++	char *str = malloc(23 * sizeof(char)); // allocate enough space for excepted input from text file
++	while (fscanf(fr, "%[^\n] ", str) != EOF) { // read file till the end
++		long unsigned int winId;
++		unsigned int tagsForWin;
++		int check = sscanf(str, "%lu %u", &winId, &tagsForWin); // get data
++		if (check != 2) // break loop if data wasn't read correctly
++			break;
++		
++		for (Client *c = selmon->clients; c ; c = c->next) { // add tags to every window by winId
++			if (c->win == winId) {
++				c->tags = tagsForWin;
++				break;
++			}
++		}
++    }
++
++	for (Client *c = selmon->clients; c ; c = c->next) { // refocus on windows
++		focus(c);
++		restack(c->mon);
++	}
++
++	for (Monitor *m = selmon; m; m = m->next) // rearrange all monitors
++		arrange(m);
++
++	free(str);
++	fclose(fr);
++	
++	// delete a file
++	remove(SESSION_FILE);
++}
++
+ void
+ quit(const Arg *arg)
+ {
+ 	if(arg->i) restart = 1;
+ 	running = 0;
++
++	if (restart == 1)
++		saveSession();
+ }
+ 
+ Monitor *
+@@ -2173,6 +2225,7 @@ main(int argc, char *argv[])
+ 		die("pledge");
+ #endif /* __OpenBSD__ */
+ 	scan();
++	restoreSession();
+ 	run();
+ 	if(restart) execvp(argv[0], argv);
+ 	cleanup();
+-- 
+2.35.1
+