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Check-in [189ff1e73a]

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Overview
Comment:Auto-detect vt number; fallback to .xirc if no WM provided
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SHA3-256:189ff1e73a25bdb2f73a43f792b645b884d234b27e0d1fb27bdd6f49f2a43337
User & Date: jmcclure 2018-01-04 03:03:07
Context
2018-01-04
03:15
Added links to current files check-in: 8a7c808dd8 user: jmcclure tags: trunk
03:03
Auto-detect vt number; fallback to .xirc if no WM provided check-in: 189ff1e73a user: jmcclure tags: trunk
2018-01-03
21:15
Added info check-in: 00626f0bb2 user: jmcclure tags: trunk
Changes
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Changes to xi.c. 

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/* xi.c
 * ----
 * Minimalist Xinit replacement
 * USAGE: xi $XDG_VTNR /path/to/wm
 * ----
 *
 * Copyright (c) 2017 Jesse McClure <code@jessemcclure.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
................................................................................
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>

#include <sys/wait.h>
#include <linux/limits.h>


static volatile int xrunning = 0;

void handler(int sig) {
	if (sig == SIGUSR1) xrunning = 1;
	if (sig == SIGCHLD || sig == SIGTERM) xrunning = 0;
}
................................................................................
	setenv("XAUTHORITY", xauth, 1);
	setenv("DISPLAY", dpy, 1);
	execlp(wm, wm, NULL);
	_exit(4);
}

int main(int argc, const char **argv) {
	if (argc != 3 || argv[1][0] < '1' || argv[1][0] > '9') {
		fprintf(stderr,"USAGE: %s vt wm\n", argv[0]);

		return 1;
	}
	char dpy[] = ":1";
	char tty[] = "vt1";
	dpy[1] = argv[1][0];
	tty[2] = argv[1][0];

	struct sigaction sa = { 0, 0, 0, 0, 0 };
	sa.sa_handler = handler;
	sigemptyset(&sa.sa_mask);
	sa.sa_flags = 0;
	sigaction(SIGUSR1, &sa, NULL);
	sigaction(SIGCHLD, &sa, NULL);
	sigaction(SIGTERM, &sa, NULL);

	int xpid = server(dpy, tty);
	while (!xrunning) pause();
	int cpid = client(dpy, argv[2]);
	while (xrunning) pause();

	kill(cpid, SIGTERM);
	waitpid(cpid, NULL, 0);
	kill(xpid, SIGTERM);
	waitpid(xpid, NULL, 0);
	return 0;
}





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/* xi.c
 * ----
 * Minimalist Xinit replacement
 * USAGE: xi /path/to/wm
 * ----
 *
 * Copyright (c) 2017 Jesse McClure <code@jessemcclure.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
................................................................................
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <linux/limits.h>
#include <linux/vt.h>

static volatile int xrunning = 0;

void handler(int sig) {
	if (sig == SIGUSR1) xrunning = 1;
	if (sig == SIGCHLD || sig == SIGTERM) xrunning = 0;
}
................................................................................
	setenv("XAUTHORITY", xauth, 1);
	setenv("DISPLAY", dpy, 1);
	execlp(wm, wm, NULL);
	_exit(4);
}

int main(int argc, const char **argv) {
	struct vt_stat vtstat;
	if (ioctl(0, VT_GETSTATE, &vtstat)) {
		perror("get_vt");
		return 1;
	}
	char dpy[] = { ':', '0' + vtstat.v_active, 0 };
	char tty[] = { 'v', 't', '0' + vtstat.v_active, 0 };



	struct sigaction sa = { 0, 0, 0, 0, 0 };
	sa.sa_handler = handler;
	sigemptyset(&sa.sa_mask);
	sa.sa_flags = 0;
	sigaction(SIGUSR1, &sa, NULL);
	sigaction(SIGCHLD, &sa, NULL);
	sigaction(SIGTERM, &sa, NULL);

	int xpid = server(dpy, tty);
	while (!xrunning) pause();
	int cpid = client(dpy, (argc > 1 ? argv[1] : ".xirc" ));
	while (xrunning) pause();

	kill(cpid, SIGTERM);
	waitpid(cpid, NULL, 0);
	kill(xpid, SIGTERM);
	waitpid(xpid, NULL, 0);
	return 0;
}