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