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79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
/*
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* Rexec program for system have fork() as vfork() with foregound option
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*
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* Copyright (C) Vladimir N. Oleynik <dzo@simtreas.ru>
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* Copyright (C) 2003 Russ Dill <Russ.Dill@asu.edu>
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*
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* daemon() portion taken from uclibc:
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*
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Modified for uClibc by Erik Andersen <andersee@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <paths.h>
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#include "libbb.h"
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#if defined(__uClinux__)
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void vfork_daemon_rexec(int nochdir, int noclose,
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int argc, char **argv, char *foreground_opt)
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{
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int fd;
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char **vfork_args;
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int a = 0;
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setsid();
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if (!nochdir)
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chdir("/");
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if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
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dup2(fd, STDIN_FILENO);
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dup2(fd, STDOUT_FILENO);
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dup2(fd, STDERR_FILENO);
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if (fd > 2)
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close(fd);
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}
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vfork_args = xcalloc(sizeof(char *), argc + 3);
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vfork_args[a++] = "/bin/busybox";
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while(*argv) {
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vfork_args[a++] = *argv;
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argv++;
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}
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vfork_args[a] = foreground_opt;
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switch (vfork()) {
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case 0: /* child */
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/* Make certain we are not a session leader, or else we
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* might reacquire a controlling terminal */
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if (vfork())
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_exit(0);
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execv(vfork_args[0], vfork_args);
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bb_perror_msg_and_die("execv %s", vfork_args[0]);
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case -1: /* error */
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bb_perror_msg_and_die("vfork");
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default: /* parent */
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exit(0);
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}
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}
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#endif /* uClinux */
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