paulo@0: /* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
paulo@0:  * See LICENSE file for license details.
paulo@0:  */
paulo@0: #include "dwm.h"
paulo@0: #include <stdarg.h>
paulo@0: #include <stdio.h>
paulo@0: #include <stdlib.h>
paulo@0: #include <sys/wait.h>
paulo@0: #include <unistd.h>
paulo@0: 
paulo@0: /* extern */
paulo@0: 
paulo@0: void *
paulo@0: emallocz(unsigned int size) {
paulo@0: 	void *res = calloc(1, size);
paulo@0: 
paulo@0: 	if(!res)
paulo@0: 		eprint("fatal: could not malloc() %u bytes\n", size);
paulo@0: 	return res;
paulo@0: }
paulo@0: 
paulo@0: void
paulo@0: eprint(const char *errstr, ...) {
paulo@0: 	va_list ap;
paulo@0: 
paulo@0: 	va_start(ap, errstr);
paulo@0: 	vfprintf(stderr, errstr, ap);
paulo@0: 	va_end(ap);
paulo@0: 	exit(EXIT_FAILURE);
paulo@0: }
paulo@0: 
paulo@0: void
paulo@0: spawn(Arg *arg) {
paulo@0: 	static char *shell = NULL;
paulo@0: 
paulo@0: 	if(!shell && !(shell = getenv("SHELL")))
paulo@0: 		shell = "/bin/sh";
paulo@0: 	if(!arg->cmd)
paulo@0: 		return;
paulo@0: 	/* The double-fork construct avoids zombie processes and keeps the code
paulo@0: 	 * clean from stupid signal handlers. */
paulo@0: 	if(fork() == 0) {
paulo@0: 		if(fork() == 0) {
paulo@0: 			if(dpy)
paulo@0: 				close(ConnectionNumber(dpy));
paulo@0: 			setsid();
paulo@0: 			execl(shell, shell, "-c", arg->cmd, (char *)NULL);
paulo@0: 			fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg->cmd);
paulo@0: 			perror(" failed");
paulo@0: 		}
paulo@0: 		exit(0);
paulo@0: 	}
paulo@0: 	wait(0);
paulo@0: }
paulo@6: 
paulo@6: void
paulo@6: spawn_insert(Arg *arg) {
paulo@6: 	func_insert(spawn, arg);
paulo@6: }