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