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("$FreeBSD$");
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 #include "bootstrap.h"
36 #include "libi386.h"
37 #include "btxv86.h"
38
39 int
bi_getboothowto(char * kargs)40 bi_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
134 void
bi_setboothowto(int howto)135 bi_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 */
149 vm_offset_t
bi_copyenv(vm_offset_t addr)150 bi_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 i386_copyin(ep->ev_name, addr, strlen(ep->ev_name));
157 addr += strlen(ep->ev_name);
158 i386_copyin("=", addr, 1);
159 addr++;
160 if (ep->ev_value != NULL) {
161 i386_copyin(ep->ev_value, addr, strlen(ep->ev_value));
162 addr += strlen(ep->ev_value);
163 }
164 i386_copyin("", addr, 1);
165 addr++;
166 }
167 i386_copyin("", addr, 1);
168 addr++;
169 return(addr);
170 }
171