Annotation of prex/usr/bin/init/init.c, Revision 1.1.1.1
1.1 nbrk 1: /*
2: * Copyright (c) 2005-2007, Kohsuke Ohtani
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. Neither the name of the author nor the names of any co-contibutors
14: * may be used to endorse or promote products derived from this software
15: * without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: */
29:
30: #include <prex/prex.h>
31: #include <sys/wait.h>
32:
33: #include <unistd.h>
34: #include <errno.h>
35: #include <fcntl.h>
36: #include <stdio.h>
37: #include <stdlib.h>
38:
39: #define PROGNAME "/boot/cmdbox"
40:
41: /*
42: * The mother of all processes.
43: */
44: int
45: main(int argc, char *argv[])
46: {
47: pid_t pid;
48:
49: setsid();
50:
51: close(0);
52: close(1);
53: close(2);
54:
55: pid = vfork();
56:
57: if (pid == -1)
58: exit(1);
59:
60: if (pid == 0) {
61: /*
62: * child
63: */
64: signal(SIGHUP, SIG_DFL);
65: signal(SIGINT, SIG_DFL);
66: signal(SIGALRM, SIG_DFL);
67:
68: open("/dev/console", O_RDWR); /* stdin */
69: dup(0); /* stdout */
70: dup(0); /* stderr */
71:
72: exit(execve(PROGNAME, 0, 0));
73: }
74: /*
75: * parent
76: */
77: thread_setprio(thread_self(), 254);
78: while (wait((int *)0) != pid);
79: return 0;
80: }
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