Remove some __STDC__ checks.
[dragonfly.git] / sbin / mkinitrd / mini_init / oinit.c
CommitLineData
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1/*-
2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Donn Seeley at Berkeley Software Design, Inc.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * @(#) Copyright (c) 1991, 1993 The Regents of the University of California. All rights reserved.
37 * @(#)init.c 8.1 (Berkeley) 7/15/93
38 * $FreeBSD: src/sbin/init/init.c,v 1.38.2.8 2001/10/22 11:27:32 des Exp $
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39 */
40
41#include <sys/param.h>
42#include <sys/ioctl.h>
43#include <sys/mount.h>
44#include <sys/sysctl.h>
45#include <sys/wait.h>
46#include <sys/stat.h>
47
48#include <db.h>
49#include <errno.h>
50#include <fcntl.h>
51#include <libutil.h>
52#include <paths.h>
53#include <signal.h>
54#include <stdio.h>
55#include <stdlib.h>
56#include <string.h>
57#include <syslog.h>
58#include <time.h>
59#include <ttyent.h>
60#include <unistd.h>
61#include <sys/reboot.h>
62#include <err.h>
63
ae14c9db 64#include <stdarg.h>
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65
66#include "pathnames.h"
67
68static int setctty(const char *);
69static void runcom(char **);
70
71/*
72 * The mother of all processes.
73 */
74int
75main(int argc __unused, char **argv)
76{
77 /* Dispose of random users. */
78 if (getuid() != 0)
79 errx(1, "%s", strerror(EPERM));
80
81 runcom(argv);
82 return 1;
83}
84
85static int
86setctty(const char *name)
87{
88 int fd;
89
90 revoke(name);
91 if ((fd = open(name, O_RDWR)) == -1) {
92 exit(1);
93 }
94
95 if (login_tty(fd) == -1) {
96 exit(1);
97 }
98
99 return fd;
100}
101
102
103static void
104runcom(char **argv_orig)
105{
106 pid_t pid, wpid;
107 int status, fd, error;
108 const char *argv[4];
109 struct sigaction sa;
110
111 fd = -1;
112
113 if ((pid = fork()) == 0) {
114 sigemptyset(&sa.sa_mask);
115 sa.sa_flags = 0;
116 sa.sa_handler = SIG_IGN;
117 sigaction(SIGTSTP, &sa, NULL);
118 sigaction(SIGHUP, &sa, NULL);
119
120 setctty(_PATH_CONSOLE);
121
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122 argv[0] = "sh";
123 argv[1] = _PATH_RUNCOM;
124 argv[2] = "autoboot" ;
125 argv[3] = 0;
126
127 sigprocmask(SIG_SETMASK, &sa.sa_mask, NULL);
128
129 execv(_PATH_BSHELL, __DECONST(char **, argv));
130 exit(1); /* force single user mode */
131 }
132
133 do {
134 wpid = waitpid(-1, &status, WUNTRACED);
135 } while (wpid != pid);
136
137 error = chroot_kernel("/new_root");
138 if (error)
139 exit(1);
140
141 error = chroot("/new_root");
142 if (error)
143 exit(1);
144
145 execv("/sbin/init", __DECONST(char **, argv_orig));
146}
147