1/*
 2 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
 3 * See LICENSE file for license details.
 4 */
 5#include "dwm.h"
 6
 7#include <stdarg.h>
 8#include <stdio.h>
 9#include <stdlib.h>
10#include <sys/wait.h>
11#include <unistd.h>
12
13/* static */
14
15static void
16bad_malloc(unsigned int size)
17{
18	eprint("fatal: could not malloc() %u bytes\n", size);
19}
20
21/* extern */
22
23void *
24emallocz(unsigned int size)
25{
26	void *res = calloc(1, size);
27
28	if(!res)
29		bad_malloc(size);
30	return res;
31}
32
33void
34eprint(const char *errstr, ...) {
35	va_list ap;
36
37	va_start(ap, errstr);
38	vfprintf(stderr, errstr, ap);
39	va_end(ap);
40	exit(EXIT_FAILURE);
41}
42
43void
44spawn(Arg *arg)
45{
46	char **argv = (char **)arg->argv;
47
48	if(!argv || !argv[0])
49		return;
50	if(fork() == 0) {
51		if(fork() == 0) {
52			if(dpy)
53				close(ConnectionNumber(dpy));
54			setsid();
55			execvp(argv[0], argv);
56			fprintf(stderr, "dwm: execvp %s", argv[0]);
57			perror(" failed");
58		}
59		exit(0);
60	}
61	wait(0);
62}