/*

 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>

 * See LICENSE file for license details.

 */

#include <stdarg.h>

#include <stdio.h>

#include <stdlib.h>

#include <sys/types.h>

#include <sys/wait.h>

#include <unistd.h>

#include "dwm.h"

void

error(const char *errstr, ...) {

	va_list ap;

	va_start(ap, errstr);

	vfprintf(stderr, errstr, ap);

	va_end(ap);

	exit(1);

}

static void

bad_malloc(unsigned int size)

{

	fprintf(stderr, "fatal: could not malloc() %d bytes\n",

			(int) size);

	exit(1);

}

void *

emallocz(unsigned int size)

{

	void *res = calloc(1, size);

	if(!res)

		bad_malloc(size);

	return res;

}

void

swap(void **p1, void **p2)

{

	void *tmp = *p1;

	*p1 = *p2;

	*p2 = tmp;

}

void

spawn(Arg *arg)

{

	char **argv = (char **)arg->argv;

	if(!argv || !argv[0])

		return;

	if(fork() == 0) {

		if(fork() == 0) {

			if(dpy)

				close(ConnectionNumber(dpy));

			setsid();

			execvp(argv[0], argv);

			fprintf(stderr, "dwm: execvp %s", argv[0]);

			perror(" failed");

		}

		exit (0);

	}

	wait(0);

}