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	xssstate.c - xssstate - a simple utility to get the X screensaver state
	git clone git://git.suckless.org/xssstate
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	---
	xssstate.c (1786B)
	---
	1 /*
	2 * See LICENSE file for copyright and license details.
	3 */
	4
	5 #include <unistd.h>
	6 #include <stdlib.h>
	7 #include <stdio.h>
	8 #include <stdarg.h>
	9 #include <stdbool.h>
	10 #include <libgen.h>
	11 #include <X11/extensions/scrnsaver.h>
	12
	13 #include "arg.h"
	14
	15 char *argv0;
	16
	17 void
	18 die(const char *errstr, ...) {
	19 va_list ap;
	20
	21 va_start(ap, errstr);
	22 vfprintf(stderr, errstr, ap);
	23 va_end(ap);
	24 exit(EXIT_FAILURE);
	25 }
	26
	27 void
	28 usage(void)
	29 {
	30 die("usage: %s [-istv]\n", basename(argv0));
	31 }
	32
	33 int
	34 main(int argc, char *argv[]) {
	35 XScreenSaverInfo *info;
	36 Display *dpy;
	37 int base, errbase;
	38 Bool showstate, showtill, showidle;
	39
	40 showstate = false;
	41 showtill = false;
	42 showidle = false;
	43
	44 ARGBEGIN {
	45 case 'i':
	46 showidle = true;
	47 break;
	48 case 's':
	49 showstate = true;
	50 break;
	51 case 't':
	52 showtill = true;
	53 break;
	54 case 'v':
	55 die("xssstate-"VERSION", © 2008-2016 xssstate engineers"
	56 ", see LICENSE for details.\n");
	57 default:
	58 usage();
	59 } ARGEND;
	60
	61 if (!showstate && !showtill && !showidle)
	62 usage();
	63
	64 if (!(dpy = XOpenDisplay(0)))
	65 die("Cannot open display.\n");
	66
	67 if (!XScreenSaverQueryExtension(dpy, &base, &errbase))
	68 die("Screensaver extension not activated.\n");
	69
	70 info = XScreenSaverAllocInfo();
	71 XScreenSaverQueryInfo(dpy, DefaultRootWindow(dpy), info);
	72
	73 if (showstate) {
	74 switch(info->state) {
	75 case ScreenSaverOn:
	76 printf("on\n");
	77 break;
	78 case ScreenSaverOff:
	79 printf("off\n");
	80 break;
	81 case ScreenSaverDisabled:
	82 printf("disabled\n");
	83 break;
	84 }
	85 } else if (showtill) {
	86 switch(info->state) {
	87 case ScreenSaverOn:
	88 printf("0\n");
	89 break;
	90 case ScreenSaverOff:
	91 printf("%lu\n", info->til_or_since);
	92 break;
	93 case ScreenSaverDisabled:
	94 printf("-1\n");
	95 break;
	96 }
	97 } else if (showidle) {
	98 printf("%lu\n", info->idle);
	99 }
	100
	101
	102 XCloseDisplay(dpy);
	103
	104 return 0;
	105 }
	106