/* (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 * erealloc(void *ptr, unsigned int size) { void *res = realloc(ptr, size); if(!res) eprint("fatal: could not malloc() %u bytes\n", size); return res; } 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); }