2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
26 * $FreeBSD: src/sys/boot/i386/libi386/bootinfo.c,v 1.35 2003/08/25 23:28:31 obrien Exp $
27 * $DragonFly: src/sys/boot/pc32/libi386/bootinfo.c,v 1.4 2004/06/25 05:37:58 dillon Exp $
31 #include <sys/param.h>
32 #include <sys/reboot.h>
33 #include <sys/linker.h>
34 #include "bootstrap.h"
39 * Return a 'boothowto' value corresponding to the kernel arguments in
40 * (kargs) and any relevant environment variables.
47 {"boot_askname", RB_ASKNAME
},
48 {"boot_cdrom", RB_CDROM
},
49 {"boot_userconfig", RB_CONFIG
},
52 {"boot_single", RB_SINGLE
},
53 {"boot_verbose", RB_VERBOSE
},
54 {"boot_vidcons", RB_VIDEO
},
55 {"boot_serial", RB_SERIAL
},
60 bi_getboothowto(char *kargs
)
73 if (!active
&& (*cp
== '-')) {
90 /* all available consoles become active */
91 howto
&= ~(RB_MUTE
|RB_VIDEO
|RB_SERIAL
);
109 howto
|= RB_DFLTROOT
;
124 /* get equivalents from the environment */
125 for (i
= 0; howto_names
[i
].ev
!= NULL
; i
++)
126 if (getenv(howto_names
[i
].ev
) != NULL
)
127 howto
|= howto_names
[i
].mask
;
128 if (!strcmp(getenv("console"), "comconsole"))
130 if (!strcmp(getenv("console"), "nullconsole"))
132 if (!strcmp(getenv("console"), "vidconsole"))
138 * Copy the environment into the load area starting at (addr).
139 * Each variable is formatted as <name>=<value>, with a single nul
140 * separating each variable, and a double nul terminating the environment.
143 bi_copyenv(vm_offset_t addr
)
147 /* traverse the environment */
148 for (ep
= environ
; ep
!= NULL
; ep
= ep
->ev_next
) {
149 i386_copyin(ep
->ev_name
, addr
, strlen(ep
->ev_name
));
150 addr
+= strlen(ep
->ev_name
);
151 i386_copyin("=", addr
, 1);
153 if (ep
->ev_value
!= NULL
) {
154 i386_copyin(ep
->ev_value
, addr
, strlen(ep
->ev_value
));
155 addr
+= strlen(ep
->ev_value
);
157 i386_copyin("", addr
, 1);
160 i386_copyin("", addr
, 1);