1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
/* $OpenBSD: boot.c,v 1.42 2014/01/24 23:32:15 deraadt Exp $ */
/*
* Copyright (c) 2003 Dale Rahn
* Copyright (c) 1997,1998 Michael Shalayeff
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/param.h>
#include <sys/reboot.h>
#include <sys/stat.h>
#include <libsa.h>
#include <lib/libsa/loadfile.h>
#include <lib/libkern/funcs.h>
#include <stand/boot/bootarg.h>
#include "cmd.h"
#ifndef KERNEL
#define KERNEL "/bsd"
#endif
char prog_ident[40];
char *progname = "BOOT";
extern const char version[];
struct cmd_state cmd;
/* bootprompt can be set by MD code to avoid prompt first time round */
int bootprompt = 1;
char *kernelfile = KERNEL; /* can be changed by MD code */
int boottimeout = 5; /* can be changed by MD code */
char rnddata[BOOTRANDOM_MAX];
void
boot(dev_t bootdev)
{
int fd;
int try = 0, st;
u_long marks[MARK_MAX];
machdep();
snprintf(prog_ident, sizeof(prog_ident),
">> OpenBSD/" MACHINE " %s %s", progname, version);
printf("%s\n", prog_ident);
devboot(bootdev, cmd.bootdev);
strlcpy(cmd.image, kernelfile, sizeof(cmd.image));
cmd.boothowto = 0;
cmd.conf = "/etc/boot.conf";
cmd.addr = (void *)DEFAULT_KERNEL_ADDRESS;
cmd.timeout = boottimeout;
st = read_conf();
if (!bootprompt)
snprintf(cmd.path, sizeof cmd.path, "%s:%s",
cmd.bootdev, cmd.image);
while (1) {
/* no boot.conf, or no boot cmd in there */
if (bootprompt && st <= 0) {
do {
printf("boot> ");
} while(!getcmd());
}
loadrandom(BOOTRANDOM, rnddata, sizeof(rnddata));
#ifdef MDRANDOM
mdrandom(rnddata, sizeof(rnddata));
#endif
st = 0;
bootprompt = 1; /* allow reselect should we fail */
printf("booting %s: ", cmd.path);
marks[MARK_START] = (u_long)cmd.addr;
if ((fd = loadfile(cmd.path, marks, LOAD_ALL)) != -1) {
close(fd);
break;
}
kernelfile = KERNEL;
try++;
strlcpy(cmd.image, kernelfile, sizeof(cmd.image));
printf(" failed(%d). will try %s\n", errno, kernelfile);
if (try < 2) {
if (cmd.timeout > 0)
cmd.timeout++;
} else {
if (cmd.timeout)
printf("Turning timeout off.\n");
cmd.timeout = 0;
}
}
/* exec */
run_loadfile(marks, cmd.boothowto);
}
void
loadrandom(char *name, char *buf, size_t buflen)
{
char path[MAXPATHLEN];
struct stat sb;
int fd, i;
#define O_RDONLY 0
/* Extract the device name from the kernel we are loading. */
for (i = 0; i < sizeof(cmd.path); i++) {
if (cmd.path[i] == ':') {
strlcpy(path, cmd.path, i + 1);
snprintf(path + i, sizeof(path) - i, ":%s", name);
break;
} else if (cmd.path[i] == '\0') {
snprintf(path, sizeof path, "%s:%s",
cmd.bootdev, name);
break;
}
}
fd = open(path, O_RDONLY);
if (fd == -1) {
if (errno == EPERM)
goto fail;
printf("cannot open %s: %s\n", path, strerror(errno));
return;
}
if (fstat(fd, &sb) == -1 ||
sb.st_uid != 0 ||
(sb.st_mode & (S_IWOTH|S_IROTH)))
goto fail;
(void) read(fd, buf, buflen);
fail:
close(fd);
}
|
