mirror of https://github.com/9wm/xss.git
86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
/* xss -- xautolock replacement using MIT-SCREEN-SAVER (it doesn't poll)
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* Copyright (C) 2008 Neale Pickett <neale@woozle.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <sys/wait.h>
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#include <unistd.h>
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#include <signal.h>
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#include <stdio.h>
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#include <X11/Xlib.h>
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#include <X11/extensions/scrnsaver.h>
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#include "obj.h"
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int child = 0;
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void
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sigchld(int signum)
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{
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(void)waitpid(-1, NULL, WNOHANG);
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child = 0;
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}
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int
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main(int argc, char *argv[])
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{
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Display *display = NULL;
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if (argc < 2) {
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fprintf(stderr, "Usage: %s PROGRAM [ARGUMENT ...]\n", argv[0]);
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return 64; /* EX_USAGE */
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}
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signal(SIGCHLD, sigchld);
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try {
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int ss_event, ss_error;
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XEvent event;
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if (! (display = XOpenDisplay(NULL))) raise("cannot open display");
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if (! XScreenSaverQueryExtension(display, &ss_event, &ss_error)) {
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raise("X server does not support MIT-SCREEN-SAVER extension.");
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}
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XScreenSaverSelectInput(display, DefaultRootWindow(display), ScreenSaverNotifyMask);
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while (! XNextEvent(display, &event)) {
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if (event.type == ss_event) {
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XScreenSaverNotifyEvent *sevent = (XScreenSaverNotifyEvent *)&event;
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if (ScreenSaverOn == sevent->state) {
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if (! child) {
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child = fork();
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if (0 == child) {
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(void)execvp(argv[1], argv + 1);
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perror("exec");
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exit(1);
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}
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}
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}
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}
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}
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} while (0);
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if (display) {
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(void)XCloseDisplay(display);
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}
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except {
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fprintf(stderr, "Error: %s\n", exception);
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return 69; /* EX_UNAVAILABLE */
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}
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return 0;
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}
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