2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Donn Seeley at Berkeley Software Design, Inc.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * @(#) Copyright (c) 1991, 1993 The Regents of the University of California. All rights reserved.
33 * @(#)init.c 8.1 (Berkeley) 7/15/93
34 * $FreeBSD: src/sbin/init/init.c,v 1.38.2.8 2001/10/22 11:27:32 des Exp $
37 #include <sys/param.h>
38 #include <sys/ioctl.h>
39 #include <sys/mount.h>
40 #include <sys/sysctl.h>
57 #include <sys/reboot.h>
62 #include "pathnames.h"
64 static int setctty(const char *);
65 static void runcom(char **);
68 * The mother of all processes.
71 main(int argc __unused, char **argv)
73 /* Dispose of random users. */
75 errx(1, "%s", strerror(EPERM));
77 /* Init is not allowed to die, it would make the kernel panic */
78 signal(SIGTERM, SIG_IGN);
85 setctty(const char *name)
90 if ((fd = open(name, O_RDWR)) == -1) {
94 if (login_tty(fd) == -1) {
103 runcom(char **argv_orig)
110 if ((pid = fork()) == 0) {
111 sigemptyset(&sa.sa_mask);
113 sa.sa_handler = SIG_IGN;
114 sigaction(SIGTSTP, &sa, NULL);
115 sigaction(SIGHUP, &sa, NULL);
117 setctty(_PATH_CONSOLE);
120 argv[1] = _PATH_RUNCOM;
121 argv[2] = "autoboot" ;
124 sigprocmask(SIG_SETMASK, &sa.sa_mask, NULL);
126 execv(_PATH_BSHELL, __DECONST(char **, argv));
127 exit(1); /* force single user mode */
131 wpid = waitpid(-1, &status, WUNTRACED);
132 } while (wpid != pid);
134 error = chdir(_PATH_NEWROOT);
138 error = chroot_kernel(_PATH_NEWROOT);
142 error = chroot(_PATH_NEWROOT);
146 execv("/sbin/init", __DECONST(char **, argv_orig));
148 /* We failed to exec /sbin/init in the chroot, sleep forever */