bootinfo.c revision 263005 
1/*-
2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/boot/userboot/userboot/bootinfo.c 263005 2014-03-11 10:13:06Z royger $");
29
30#include <stand.h>
31#include <sys/param.h>
32#include <sys/reboot.h>
33#include <sys/linker.h>
34#include <sys/boot.h>
35
36#include "bootstrap.h"
37#include "libuserboot.h"
38
39int
40bi_getboothowto(char *kargs)
41{
42    char	*cp;
43    char	*curpos, *next, *string;
44    int		howto;
45    int		active;
46    int		i;
47    int		vidconsole;
48
49    /* Parse kargs */
50    howto = 0;
51    if (kargs  != NULL) {
52	cp = kargs;
53	active = 0;
54	while (*cp != 0) {
55	    if (!active && (*cp == '-')) {
56		active = 1;
57	    } else if (active)
58		switch (*cp) {
59		case 'a':
60		    howto |= RB_ASKNAME;
61		    break;
62		case 'C':
63		    howto |= RB_CDROM;
64		    break;
65		case 'd':
66		    howto |= RB_KDB;
67		    break;
68		case 'D':
69		    howto |= RB_MULTIPLE;
70		    break;
71		case 'm':
72		    howto |= RB_MUTE;
73		    break;
74		case 'g':
75		    howto |= RB_GDB;
76		    break;
77		case 'h':
78		    howto |= RB_SERIAL;
79		    break;
80		case 'p':
81		    howto |= RB_PAUSE;
82		    break;
83		case 'r':
84		    howto |= RB_DFLTROOT;
85		    break;
86		case 's':
87		    howto |= RB_SINGLE;
88		    break;
89		case 'v':
90		    howto |= RB_VERBOSE;
91		    break;
92		default:
93		    active = 0;
94		    break;
95		}
96	    cp++;
97	}
98    }
99    /* get equivalents from the environment */
100    for (i = 0; howto_names[i].ev != NULL; i++)
101	if (getenv(howto_names[i].ev) != NULL)
102	    howto |= howto_names[i].mask;
103
104    /* Enable selected consoles */
105    string = next = strdup(getenv("console"));
106    vidconsole = 0;
107    while (next != NULL) {
108	curpos = strsep(&next, " ,");
109	if (*curpos == '\0')
110		continue;
111	if (!strcmp(curpos, "vidconsole"))
112	    vidconsole = 1;
113	else if (!strcmp(curpos, "comconsole"))
114	    howto |= RB_SERIAL;
115	else if (!strcmp(curpos, "nullconsole"))
116	    howto |= RB_MUTE;
117    }
118
119    if (vidconsole && (howto & RB_SERIAL))
120	howto |= RB_MULTIPLE;
121
122    /*
123     * XXX: Note that until the kernel is ready to respect multiple consoles
124     * for the boot messages, the first named console is the primary console
125     */
126    if (!strcmp(string, "vidconsole"))
127	howto &= ~RB_SERIAL;
128
129    free(string);
130
131    return(howto);
132}
133
134void
135bi_setboothowto(int howto)
136{
137    int		i;
138
139    for (i = 0; howto_names[i].ev != NULL; i++)
140	if (howto & howto_names[i].mask)
141	    setenv(howto_names[i].ev, "YES", 1);
142}
143
144/*
145 * Copy the environment into the load area starting at (addr).
146 * Each variable is formatted as <name>=<value>, with a single nul
147 * separating each variable, and a double nul terminating the environment.
148 */
149vm_offset_t
150bi_copyenv(vm_offset_t addr)
151{
152    struct env_var	*ep;
153
154    /* traverse the environment */
155    for (ep = environ; ep != NULL; ep = ep->ev_next) {
156        CALLBACK(copyin, ep->ev_name, addr, strlen(ep->ev_name));
157	addr += strlen(ep->ev_name);
158	CALLBACK(copyin, "=", addr, 1);
159	addr++;
160	if (ep->ev_value != NULL) {
161            CALLBACK(copyin, ep->ev_value, addr, strlen(ep->ev_value));
162	    addr += strlen(ep->ev_value);
163	}
164	CALLBACK(copyin, "", addr, 1);
165	addr++;
166    }
167    CALLBACK(copyin, "", addr, 1);
168    addr++;
169    return(addr);
170}
171