slock

commit fad6aca78f2b54089c44a33da5124f2fd994bf33
parent 5fa767f5f20a025793d4968f9421e946c1612c4b
Author: Louis Burda <quent.burda@gmail.com>
Date:   Thu, 28 Sep 2023 02:16:07 +0200

Enable powersaving after x seconds

Diffstat:
M
config.def.h
 | 
3
+++
M
slock.c
 | 
20
++++++++++++++++++++

2 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/config.def.h b/config.def.h
@@ -11,6 +11,9 @@ static const char *colorname[NUMCOLS] = {
 /* allow control key to trigger fail on clear */
 static const int controlkeyclear = 0;
 
+/* time in seconds before the monitor shuts down */
+static const int monitortime = 30;
+
 /* treat a cleared input like a wrong password (color) */
 static const int failonclear = 1;
 
diff --git a/slock.c b/slock.c
@@ -15,6 +15,7 @@
 #include <unistd.h>
 #include <sys/types.h>
 #include <X11/extensions/Xrandr.h>
+#include <X11/extensions/dpms.h>
 #include <X11/keysym.h>
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
@@ -333,6 +334,7 @@ main(int argc, char **argv) {
 	const char *hash;
 	Display *dpy;
 	int s, nlocks, nscreens;
+	CARD16 standby, suspend, off;
 
 	ARGBEGIN {
 	case 'v':
@@ -447,6 +449,20 @@ main(int argc, char **argv) {
 	if (nlocks != nscreens)
 		return 1;
 
+	/* DPMS magic to disable the monitor */
+	if (!DPMSCapable(dpy))
+		die("slock: DPMSCapable failed\n");
+	if (!DPMSEnable(dpy))
+		die("slock: DPMSEnable failed\n");
+	if (!DPMSGetTimeouts(dpy, &standby, &suspend, &off))
+		die("slock: DPMSGetTimeouts failed\n");
+	if (!standby || !suspend || !off)
+		die("slock: at least one DPMS variable is zero\n");
+	if (!DPMSSetTimeouts(dpy, monitortime, monitortime, monitortime))
+		die("slock: DPMSSetTimeouts failed\n");
+
+	XSync(dpy, 0);
+
 	/* run post-lock command */
 	if (argc > 0) {
 		switch (fork()) {
@@ -464,5 +480,9 @@ main(int argc, char **argv) {
 	/* everything is now blank. Wait for the correct password */
 	readpw(dpy, &rr, locks, nscreens, hash);
 
+	/* reset DPMS values to inital ones */
+	DPMSSetTimeouts(dpy, standby, suspend, off);
+	XSync(dpy, 0);
+
 	return 0;
 }