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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
/* $OpenBSD: user.c,v 1.23 2006/07/27 04:06:13 ray Exp $ */
/*
* Copyright (c) 1997 Tobias Weingartner
* 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 AUTHOR 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 <err.h>
#include <errno.h>
#include <util.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/disklabel.h>
#include <machine/param.h>
#include "user.h"
#include "disk.h"
#include "misc.h"
#include "mbr.h"
#include "cmd.h"
/* Our command table */
static cmd_table_t cmd_table[] = {
{"help", Xhelp, "Command help list"},
{"manual", Xmanual, "Show entire OpenBSD man page for fdisk"},
{"reinit", Xreinit, "Re-initialize loaded MBR (to defaults)"},
{"setpid", Xsetpid, "Set the identifier of a given table entry"},
{"disk", Xdisk, "Edit current drive stats"},
{"edit", Xedit, "Edit given table entry"},
{"flag", Xflag, "Flag given table entry as bootable"},
{"update", Xupdate, "Update machine code in loaded MBR"},
{"select", Xselect, "Select extended partition table entry MBR"},
{"swap", Xswap, "Swap two partition entries"},
{"print", Xprint, "Print loaded MBR partition table"},
{"write", Xwrite, "Write loaded MBR to disk"},
{"exit", Xexit, "Exit edit of current MBR, without saving changes"},
{"quit", Xquit, "Quit edit of current MBR, saving current changes"},
{"abort", Xabort, "Abort program without saving current changes"},
{NULL, NULL, NULL}
};
int
USER_init(disk_t *disk, mbr_t *tt, int preserve)
{
int fd, yn;
char mbr_buf[DEV_BSIZE];
char *msgp = "\nDo you wish to write new MBR?";
char *msgk = "\nDo you wish to write new MBR and partition table?";
if (preserve)
MBR_pcopy(disk, tt);
else
MBR_init(disk, tt);
/* Write sector 0 */
printf("\a\n"
"\t-----------------------------------------------------\n"
"\t------ ATTENTION - UPDATING MASTER BOOT RECORD ------\n"
"\t-----------------------------------------------------\n");
if (preserve)
yn = ask_yn(msgp);
else
yn = ask_yn(msgk);
if (yn) {
fd = DISK_open(disk->name, O_RDWR);
MBR_make(tt, mbr_buf);
if (MBR_write(fd, 0, mbr_buf) == -1) {
int saved_errno = errno;
DISK_close(fd);
errno = saved_errno;
return (-1);
}
DISK_close(fd);
} else
printf("MBR is unchanged\n");
return (0);
}
int modified;
int
USER_modify(disk_t *disk, mbr_t *tt, off_t offset, off_t reloff)
{
static int editlevel;
char mbr_buf[DEV_BSIZE];
mbr_t mbr;
cmd_t cmd;
int i, st, fd;
/* One level deeper */
editlevel += 1;
/* Set up command table pointer */
cmd.table = cmd_table;
/* Read MBR & partition */
fd = DISK_open(disk->name, O_RDONLY);
MBR_read(fd, offset, mbr_buf);
DISK_close(fd);
/* Parse the sucker */
MBR_parse(disk, mbr_buf, offset, reloff, &mbr);
printf("Enter 'help' for information\n");
/* Edit cycle */
do {
again:
printf("fdisk:%c%d> ", (modified)?'*':' ', editlevel);
fflush(stdout);
ask_cmd(&cmd);
if (cmd.cmd[0] == '\0')
goto again;
for (i = 0; cmd_table[i].cmd != NULL; i++)
if (strstr(cmd_table[i].cmd, cmd.cmd)==cmd_table[i].cmd)
break;
/* Quick hack to put in '?' == 'help' */
if (!strcmp(cmd.cmd, "?"))
i = 0;
/* Check for valid command */
if (cmd_table[i].cmd == NULL) {
printf("Invalid command '%s'. Try 'help'.\n", cmd.cmd);
continue;
} else
strlcpy(cmd.cmd, cmd_table[i].cmd, sizeof cmd.cmd);
/* Call function */
st = cmd_table[i].fcn(&cmd, disk, &mbr, tt, offset);
/* Update status */
if (st == CMD_EXIT)
break;
if (st == CMD_SAVE)
break;
if (st == CMD_CLEAN)
modified = 0;
if (st == CMD_DIRTY)
modified = 1;
} while (1);
/* Write out MBR */
if (modified) {
if (st == CMD_SAVE) {
printf("Writing current MBR to disk.\n");
fd = DISK_open(disk->name, O_RDWR);
MBR_make(&mbr, mbr_buf);
if (MBR_write(fd, offset, mbr_buf) == -1) {
warn("error writing MBR");
close(fd);
goto again;
}
close(fd);
} else
printf("Aborting changes to current MBR.\n");
}
/* One level less */
editlevel -= 1;
return (0);
}
int
USER_print_disk(disk_t *disk)
{
int fd, offset, firstoff, i;
char mbr_buf[DEV_BSIZE];
mbr_t mbr;
fd = DISK_open(disk->name, O_RDONLY);
offset = firstoff = 0;
DISK_printmetrics(disk, NULL);
do {
MBR_read(fd, (off_t)offset, mbr_buf);
MBR_parse(disk, mbr_buf, offset, firstoff, &mbr);
printf("Offset: %d\t", (int)offset);
MBR_print(&mbr, NULL);
/* Print out extended partitions too */
for (offset = i = 0; i < 4; i++)
if (mbr.part[i].id == DOSPTYP_EXTEND ||
mbr.part[i].id == DOSPTYP_EXTENDL) {
offset = mbr.part[i].bs;
if (firstoff == 0)
firstoff = offset;
}
} while (offset);
return (DISK_close(fd));
}
|
