xref: /titanic_50/usr/src/ucblib/libucb/port/sys/reboot.c (revision 20c794b39650d115e17a15983b6b82e46238cf45)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright (c) 1997, by Sun Microsystems, Inc.
24  * All rights reserved.
25  */
26 
27 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
28 /*	  All Rights Reserved  	*/
29 
30 
31 /* 	Portions Copyright(c) 1988, Sun Microsystems Inc.	*/
32 /*	All Rights Reserved					*/
33 
34 #pragma ident	"%Z%%M%	%I%	%E% SMI"	/* SVr4.0 1.2	*/
35 
36 /*LINTLIBRARY*/
37 
38 #include <sys/types.h>
39 #include <sys/uadmin.h>
40 #include <unistd.h>
41 #include <errno.h>
42 
43 /*
44  * Not all BSD's semantics are supported
45  * including RB_SINGLE, RB_RB_DUMP, RB_STRING
46  */
47 
48 /*
49  * BSD reboot.h
50  */
51 #define	RB_AUTOBOOT	0	/* flags for system auto-booting itself */
52 
53 #define	RB_ASKNAME	0x001   /* ask for file name to reboot from */
54 #define	RB_SINGLE	0x002   /* reboot to single user only */
55 #define	RB_NOSYNC	0x004   /* dont sync before reboot */
56 #define	RB_HALT		0x008   /* don't reboot, just halt */
57 #define	RB_INITNAME	0x010   /* name given for /etc/init */
58 #define	RB_NOBOOTRC	0x020   /* don't run /etc/rc.boot */
59 #define	RB_DEBUG	0x040   /* being run under debugger */
60 #define	RB_DUMP		0x080   /* dump system core */
61 #define	RB_WRITABLE	0x100   /* mount root read/write */
62 #define	RB_STRING	0x200   /* pass boot args to prom monitor */
63 
64 /*ARGSUSED*/
65 int
66 reboot(int howto, char *bootargs)
67 {
68 	int	cmd;
69 	int	fcn;
70 	int	mdep = 0;
71 
72 	if (getuid() != 0) {
73 		errno = EPERM;
74 		return (-1);
75 	}
76 
77 	if (howto & RB_HALT) {
78 		cmd = A_SHUTDOWN;
79 		fcn = AD_HALT;
80 	} else if (howto & RB_ASKNAME) {
81 		cmd = A_SHUTDOWN;
82 		fcn = AD_IBOOT;
83 	} else {		/* assume RB_AUTOBOOT */
84 		cmd = A_SHUTDOWN;
85 		fcn = AD_BOOT;
86 	}
87 
88 	/* return something to be consistent with the original prototype */
89 	return (uadmin(cmd, fcn, mdep));
90 		/* most cases, we are gone and code does not reach here */
91 }
92