| 1 | /*␊ |
| 2 | * Copyright (c) 2002 Apple Computer, Inc. All rights reserved.␊ |
| 3 | *␊ |
| 4 | * ␊ |
| 5 | * This file contains Original Code and/or Modifications of Original Code␊ |
| 6 | * as defined in and that are subject to the Apple Public Source License␊ |
| 7 | * Version 2.0 (the 'License'). You may not use this file except in␊ |
| 8 | * compliance with the License. Please obtain a copy of the License at␊ |
| 9 | * http://www.opensource.apple.com/apsl/ and read it before using this␊ |
| 10 | * file.␊ |
| 11 | * ␊ |
| 12 | * The Original Code and all software distributed under the License are␊ |
| 13 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
| 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.␊ |
| 17 | * Please see the License for the specific language governing rights and␊ |
| 18 | * limitations under the License.␊ |
| 19 | * ␊ |
| 20 | * Copyright (c) 1997 Tobias Weingartner␊ |
| 21 | * All rights reserved.␊ |
| 22 | *␊ |
| 23 | * Redistribution and use in source and binary forms, with or without␊ |
| 24 | * modification, are permitted provided that the following conditions␊ |
| 25 | * are met:␊ |
| 26 | * 1. Redistributions of source code must retain the above copyright␊ |
| 27 | * notice, this list of conditions and the following disclaimer.␊ |
| 28 | * 2. Redistributions in binary form must reproduce the above copyright␊ |
| 29 | * notice, this list of conditions and the following disclaimer in the␊ |
| 30 | * documentation and/or other materials provided with the distribution.␊ |
| 31 | * 3. All advertising materials mentioning features or use of this software␊ |
| 32 | * must display the following acknowledgement:␊ |
| 33 | * This product includes software developed by Tobias Weingartner.␊ |
| 34 | * 4. The name of the author may not be used to endorse or promote products␊ |
| 35 | * derived from this software without specific prior written permission.␊ |
| 36 | *␊ |
| 37 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR␊ |
| 38 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES␊ |
| 39 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.␊ |
| 40 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,␊ |
| 41 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT␊ |
| 42 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,␊ |
| 43 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY␊ |
| 44 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT␊ |
| 45 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF␊ |
| 46 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.␊ |
| 47 | */␊ |
| 48 | ␊ |
| 49 | #include <err.h>␊ |
| 50 | #include <util.h>␊ |
| 51 | #include <stdio.h>␊ |
| 52 | #include <unistd.h>␊ |
| 53 | #include <string.h>␊ |
| 54 | #include <sys/fcntl.h>␊ |
| 55 | #include <sys/types.h>␊ |
| 56 | #include <sys/stat.h>␊ |
| 57 | #include <machine/param.h>␊ |
| 58 | #include "user.h"␊ |
| 59 | #include "disk.h"␊ |
| 60 | #include "misc.h"␊ |
| 61 | #include "mbr.h"␊ |
| 62 | #include "cmd.h"␊ |
| 63 | ␊ |
| 64 | ␊ |
| 65 | /* Our command table */␊ |
| 66 | static cmd_table_t cmd_table[] = {␊ |
| 67 | ␉{"help", Xhelp,␉"Command help list"},␊ |
| 68 | ␉{"manual", Xmanual,␉"Show entire man page for fdisk"},␊ |
| 69 | ␉{"reinit", Xreinit,␉"Re-initialize loaded MBR (to defaults)"},␊ |
| 70 | ␉{"auto", Xauto, "Auto-partition the disk with a partition style"},␊ |
| 71 | ␉{"setpid", Xsetpid,␉"Set the identifier of a given table entry"},␊ |
| 72 | ␉{"disk", Xdisk,␉"Edit current drive stats"},␊ |
| 73 | ␉{"edit", Xedit,␉"Edit given table entry"},␊ |
| 74 | ␉{"erase", Xerase, "Erase current MBR"},␊ |
| 75 | ␉{"flag", Xflag,␉"Flag given table entry as bootable"},␊ |
| 76 | ␉{"update", Xupdate,␉"Update machine code in loaded MBR"},␊ |
| 77 | ␉{"select", Xselect,␉"Select extended partition table entry MBR"},␊ |
| 78 | ␉{"print", Xprint,␉"Print loaded MBR partition table"},␊ |
| 79 | ␉{"write", Xwrite,␉"Write loaded MBR to disk"},␊ |
| 80 | ␉{"exit", Xexit,␉"Exit edit of current MBR, without saving changes"},␊ |
| 81 | ␉{"quit", Xquit,␉"Quit edit of current MBR, saving current changes"},␊ |
| 82 | ␉{"abort", Xabort,␉"Abort program without saving current changes"},␊ |
| 83 | ␉{NULL, NULL,␉NULL}␊ |
| 84 | };␊ |
| 85 | ␊ |
| 86 | ␊ |
| 87 | int␊ |
| 88 | USER_write(disk, tt, preserve, force)␊ |
| 89 | ␉disk_t *disk;␊ |
| 90 | ␉mbr_t *tt; /* Template MBR to write */␊ |
| 91 | ␉int preserve; /* Preserve partition table and just write boot code */␊ |
| 92 | ␉int force; /* Don't ask any questions */␊ |
| 93 | {␊ |
| 94 | ␉int fd, yn;␊ |
| 95 | ␉char *msgp = "\nDo you wish to write new MBR?";␊ |
| 96 | ␉char *msgk = "\nDo you wish to write new MBR and partition table?";␊ |
| 97 | ␊ |
| 98 | ␉/* Write sector 0 */␊ |
| 99 | ␉if (force) {␊ |
| 100 | ␉ yn = 1;␊ |
| 101 | ␉} else {␊ |
| 102 | ␉ printf("\a\n"␊ |
| 103 | ␉␉ "\t-----------------------------------------------------\n"␊ |
| 104 | ␉␉ "\t------ ATTENTION - UPDATING MASTER BOOT RECORD ------\n"␊ |
| 105 | ␉␉ "\t-----------------------------------------------------\n");␊ |
| 106 | ␉ if (preserve)␊ |
| 107 | ␉ yn = ask_yn(msgp, 0);␊ |
| 108 | ␉ else␊ |
| 109 | ␉ yn = ask_yn(msgk, 0);␊ |
| 110 | ␉}␊ |
| 111 | ␊ |
| 112 | ␉if (yn) {␊ |
| 113 | ␉ if (preserve) {␊ |
| 114 | ␉ int shared;␊ |
| 115 | ␉ /* Only write the first one, if there's more than one in an extended partition chain */␊ |
| 116 | ␉ /* Since we're updating boot code, we don't require exclusive access */␊ |
| 117 | ␉ fd = DISK_openshared(disk->name, O_RDWR, &shared);␊ |
| 118 | ␉ MBR_make(tt);␊ |
| 119 | ␉ MBR_write(disk, fd, tt);␊ |
| 120 | ␉ DISK_close(fd);␊ |
| 121 | ␉ } else {␊ |
| 122 | ␉ MBR_write_all(disk, tt);␊ |
| 123 | ␉ }␊ |
| 124 | ␉} else {␊ |
| 125 | ␉ printf("MBR is unchanged\n");␊ |
| 126 | ␉}␊ |
| 127 | ␊ |
| 128 | ␉return (0);␊ |
| 129 | }␊ |
| 130 | ␊ |
| 131 | ␊ |
| 132 | int␊ |
| 133 | USER_modify(disk, tt, offset, reloff)␊ |
| 134 | ␉disk_t *disk;␊ |
| 135 | ␉mbr_t *tt;␊ |
| 136 | ␉off_t offset;␊ |
| 137 | ␉off_t reloff;␊ |
| 138 | {␊ |
| 139 | ␉static int editlevel;␊ |
| 140 | ␉mbr_t *mbr;␊ |
| 141 | ␉cmd_t cmd;␊ |
| 142 | ␉int i, st, fd;␊ |
| 143 | ␉int modified = 0;␉␊ |
| 144 | ␊ |
| 145 | ␉/* One level deeper */␊ |
| 146 | ␉editlevel += 1;␊ |
| 147 | ␊ |
| 148 | ␉/* Set up command table pointer */␊ |
| 149 | ␉cmd.table = cmd_table;␊ |
| 150 | ␊ |
| 151 | ␉/* Read MBR & partition */␊ |
| 152 | ␉mbr = MBR_alloc(NULL);␊ |
| 153 | ␉fd = DISK_open(disk->name, O_RDONLY);␊ |
| 154 | ␉MBR_read(disk, fd, offset, mbr);␊ |
| 155 | ␉DISK_close(fd);␊ |
| 156 | ␊ |
| 157 | ␉/* Parse the sucker */␊ |
| 158 | ␉MBR_parse(disk, offset, reloff, mbr);␊ |
| 159 | ␊ |
| 160 | ␉if (mbr->signature != MBR_SIGNATURE) {␊ |
| 161 | ␉ int yn = ask_yn("The signature for this MBR is invalid.\nWould you like to initialize the partition table?", 1);␊ |
| 162 | ␉ if (yn) {␊ |
| 163 | ␉ strcpy(cmd.cmd, "erase");␊ |
| 164 | ␉ cmd.args[0] = '\0';␊ |
| 165 | ␉ st = Xerase(&cmd, disk, mbr, tt, offset);␊ |
| 166 | ␉ modified = 1;␊ |
| 167 | ␉ }␊ |
| 168 | ␉}␊ |
| 169 | ␊ |
| 170 | ␉printf("Enter 'help' for information\n");␊ |
| 171 | ␊ |
| 172 | ␉/* Edit cycle */␊ |
| 173 | ␉do {␊ |
| 174 | again:␊ |
| 175 | ␉␉printf("fdisk:%c%d> ", (modified)?'*':' ', editlevel);␊ |
| 176 | ␉␉fflush(stdout);␊ |
| 177 | ␉␉ask_cmd(&cmd);␊ |
| 178 | ␊ |
| 179 | ␉␉if (cmd.cmd[0] == '\0')␊ |
| 180 | ␉␉␉goto again;␊ |
| 181 | ␉␉for (i = 0; cmd_table[i].cmd != NULL; i++)␊ |
| 182 | ␉␉␉if (strstr(cmd_table[i].cmd, cmd.cmd)==cmd_table[i].cmd)␊ |
| 183 | ␉␉␉␉break;␊ |
| 184 | ␊ |
| 185 | ␉␉/* Quick hack to put in '?' == 'help' */␊ |
| 186 | ␉␉if (!strcmp(cmd.cmd, "?"))␊ |
| 187 | ␉␉␉i = 0;␊ |
| 188 | ␊ |
| 189 | ␉␉/* Check for valid command */␊ |
| 190 | ␉␉if (cmd_table[i].cmd == NULL) {␊ |
| 191 | ␉␉␉printf("Invalid command '%s'. Try 'help'.\n", cmd.cmd);␊ |
| 192 | ␉␉␉continue;␊ |
| 193 | ␉␉} else␊ |
| 194 | ␉␉␉strcpy(cmd.cmd, cmd_table[i].cmd);␊ |
| 195 | ␊ |
| 196 | ␉␉/* Call function */␊ |
| 197 | ␉␉st = cmd_table[i].fcn(&cmd, disk, mbr, tt, offset);␊ |
| 198 | ␊ |
| 199 | ␉␉/* Update status */␊ |
| 200 | ␉␉if (st == CMD_EXIT)␊ |
| 201 | ␉␉␉break;␊ |
| 202 | ␉␉if (st == CMD_SAVE)␊ |
| 203 | ␉␉␉break;␊ |
| 204 | ␉␉if (st == CMD_CLEAN)␊ |
| 205 | ␉␉␉modified = 0;␊ |
| 206 | ␉␉if (st == CMD_DIRTY)␊ |
| 207 | ␉␉␉modified = 1;␊ |
| 208 | ␉} while (1);␊ |
| 209 | ␊ |
| 210 | ␉/* Write out MBR */␊ |
| 211 | ␉if (modified) {␊ |
| 212 | ␉␉if (st == CMD_SAVE) {␊ |
| 213 | ␉␉ ␉int shared = 0;␊ |
| 214 | ␉␉␉printf("Writing current MBR to disk.\n");␊ |
| 215 | ␉␉␉fd = DISK_openshared(disk->name, O_RDWR, &shared);␊ |
| 216 | ␉␉␉if(shared) {␊ |
| 217 | ␉␉␉ if(!ask_yn("Device could not be accessed exclusively.\nA reboot will be needed for changes to take effect. OK?", 0)) {␊ |
| 218 | ␉␉␉ close(fd);␊ |
| 219 | ␉␉␉ goto again;␊ |
| 220 | ␉␉␉ }␊ |
| 221 | ␉␉␉}␊ |
| 222 | ␊ |
| 223 | ␉␉␉MBR_make(mbr);␊ |
| 224 | ␉␉␉MBR_write(disk, fd, mbr);␊ |
| 225 | ␉␉␉close(fd);␊ |
| 226 | ␉␉} else {␊ |
| 227 | ␉ int yn = ask_yn("MBR was modified; really quit without saving?", 0);␊ |
| 228 | ␉␉␉if (yn) {␊ |
| 229 | ␉␉␉␉printf("Aborting changes to current MBR.\n");␊ |
| 230 | ␉␉␉} else {␊ |
| 231 | ␉␉␉␉goto again;␊ |
| 232 | ␉␉␉}␊ |
| 233 | ␉␉}␊ |
| 234 | ␉}␊ |
| 235 | ␊ |
| 236 | ␉/* One level less */␊ |
| 237 | ␉editlevel -= 1;␊ |
| 238 | ␊ |
| 239 | ␉MBR_free(mbr);␊ |
| 240 | ␉␊ |
| 241 | ␉return (0);␊ |
| 242 | }␊ |
| 243 | ␊ |
| 244 | int␊ |
| 245 | USER_print_disk(disk, do_dump)␊ |
| 246 | ␉disk_t *disk;␊ |
| 247 | ␉int do_dump;␊ |
| 248 | {␊ |
| 249 | ␉int fd, offset, firstoff;␊ |
| 250 | ␉mbr_t *mbr;␊ |
| 251 | ␊ |
| 252 | ␉fd = DISK_open(disk->name, O_RDONLY);␊ |
| 253 | ␉offset = firstoff = 0;␊ |
| 254 | ␊ |
| 255 | ␉if (!do_dump)␊ |
| 256 | ␉ DISK_printmetrics(disk);␊ |
| 257 | ␊ |
| 258 | ␉mbr = MBR_read_all(disk);␊ |
| 259 | ␉if (do_dump)␊ |
| 260 | ␉ MBR_dump_all(mbr);␊ |
| 261 | ␉else␊ |
| 262 | ␉ MBR_print_all(mbr);␊ |
| 263 | ␉MBR_free(mbr);␊ |
| 264 | ␊ |
| 265 | ␉return (DISK_close(fd));␊ |
| 266 | }␊ |
| 267 | ␊ |
| 268 | ␊ |
| 269 | ␊ |
| 270 | |
