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 <string.h>
10#include <sys/types.h>
11#include <sys/wait.h>
12#include <unistd.h>
13
14#include "wm.h"
15
16void
17error(const char *errstr, ...) {
18	va_list ap;
19	va_start(ap, errstr);
20	vfprintf(stderr, errstr, ap);
21	va_end(ap);
22	exit(1);
23}
24
25static void
26bad_malloc(unsigned int size)
27{
28	fprintf(stderr, "fatal: could not malloc() %d bytes\n",
29			(int) size);
30	exit(1);
31}
32
33void *
34emallocz(unsigned int size)
35{
36	void *res = calloc(1, size);
37	if(!res)
38		bad_malloc(size);
39	return res;
40}
41
42void *
43emalloc(unsigned int size)
44{
45	void *res = malloc(size);
46	if(!res)
47		bad_malloc(size);
48	return res;
49}
50
51void *
52erealloc(void *ptr, unsigned int size)
53{
54	void *res = realloc(ptr, size);
55	if(!res)
56		bad_malloc(size);
57	return res;
58}
59
60char *
61estrdup(const char *str)
62{
63	char *res = strdup(str);
64	if(!res)
65		bad_malloc(strlen(str));
66	return res;
67}
68
69void
70swap(void **p1, void **p2)
71{
72	void *tmp = *p1;
73	*p1 = *p2;
74	*p2 = tmp;
75}
76
77void
78spawn(char *argv[])
79{
80	if(!argv || !argv[0])
81		return;
82	if(fork() == 0) {
83		if(fork() == 0) {
84			if(dpy)
85				close(ConnectionNumber(dpy));
86			setsid();
87			execvp(argv[0], argv);
88			fprintf(stderr, "dwm: execvp %s", argv[0]);
89			perror(" failed");
90		}
91		exit (0);
92	}
93	wait(0);
94}