1/*
 2 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
 3 * See LICENSE file for license details.
 4 */
 5
 6#include <stdarg.h>
 7#include <stdio.h>
 8#include <stdlib.h>
 9#include <sys/types.h>
10#include <sys/wait.h>
11#include <unistd.h>
12
13#include "dwm.h"
14
15void
16error(const char *errstr, ...) {
17	va_list ap;
18	va_start(ap, errstr);
19	vfprintf(stderr, errstr, ap);
20	va_end(ap);
21	exit(1);
22}
23
24static void
25bad_malloc(unsigned int size)
26{
27	fprintf(stderr, "fatal: could not malloc() %d bytes\n",
28			(int) size);
29	exit(1);
30}
31
32void *
33emallocz(unsigned int size)
34{
35	void *res = calloc(1, size);
36	if(!res)
37		bad_malloc(size);
38	return res;
39}
40
41void
42swap(void **p1, void **p2)
43{
44	void *tmp = *p1;
45	*p1 = *p2;
46	*p2 = tmp;
47}
48
49void
50spawn(Arg *arg)
51{
52	char **argv = (char **)arg->argv;
53	if(!argv || !argv[0])
54		return;
55	if(fork() == 0) {
56		if(fork() == 0) {
57			if(dpy)
58				close(ConnectionNumber(dpy));
59			setsid();
60			execvp(argv[0], argv);
61			fprintf(stderr, "dwm: execvp %s", argv[0]);
62			perror(" failed");
63		}
64		exit (0);
65	}
66	wait(0);
67}