dwm/util.c

58 lines
1.2 KiB
C
Raw Normal View History

/* © 2006-2007 Anselm R. Garbe <garbeam at gmail dot com>
* © 2006-2007 Sander van Dijk <a dot h dot vandijk at gmail dot com>
* © 2006-2007 Jukka Salmi <jukka at salmi dot ch>
* © 2007 Premysl Hruby <dfenze at gmail dot com>
* © 2007 Szabolcs Nagy <nszabolcs at gmail dot com>
2007-04-13 11:32:38 +02:00
* See LICENSE file for license details. */
#include "dwm.h"
2006-07-10 18:35:39 +02:00
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
2006-07-10 22:16:48 +02:00
#include <sys/wait.h>
#include <unistd.h>
/* extern */
void *
emallocz(unsigned int size) {
void *res = calloc(1, size);
2006-07-20 12:18:06 +02:00
if(!res)
eprint("fatal: could not malloc() %u bytes\n", size);
return res;
}
void
eprint(const char *errstr, ...) {
va_list ap;
2006-07-20 12:18:06 +02:00
va_start(ap, errstr);
vfprintf(stderr, errstr, ap);
va_end(ap);
2006-07-18 08:18:54 +02:00
exit(EXIT_FAILURE);
}
2006-07-10 22:16:48 +02:00
void
spawn(const char *arg) {
static char *shell = NULL;
2006-07-20 12:18:06 +02:00
if(!shell && !(shell = getenv("SHELL")))
shell = "/bin/sh";
if(!arg)
2006-07-10 22:16:48 +02:00
return;
2006-09-20 09:49:32 +02:00
/* The double-fork construct avoids zombie processes and keeps the code
* clean from stupid signal handlers. */
2006-07-10 22:16:48 +02:00
if(fork() == 0) {
if(fork() == 0) {
if(dpy)
close(ConnectionNumber(dpy));
setsid();
execl(shell, shell, "-c", arg, (char *)NULL);
fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
2006-07-10 22:16:48 +02:00
perror(" failed");
}
exit(0);
2006-07-10 22:16:48 +02:00
}
wait(0);
}