1 | /*␊ |
2 | * Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.␊ |
3 | *␊ |
4 | * @APPLE_LICENSE_HEADER_START@␊ |
5 | * ␊ |
6 | * Portions Copyright (c) 1999-2003 Apple Computer, Inc. All Rights␊ |
7 | * Reserved. This file contains Original Code and/or Modifications of␊ |
8 | * Original Code as defined in and that are subject to the Apple Public␊ |
9 | * Source License Version 2.0 (the "License"). You may not use this file␊ |
10 | * except in compliance with the License. Please obtain a copy of the␊ |
11 | * License at http://www.apple.com/publicsource and read it before using␊ |
12 | * this file.␊ |
13 | * ␊ |
14 | * The Original Code and all software distributed under the License are␊ |
15 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
16 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
17 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
18 | * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the␊ |
19 | * License for the specific language governing rights and limitations␊ |
20 | * under the License.␊ |
21 | * ␊ |
22 | * @APPLE_LICENSE_HEADER_END@␊ |
23 | */␊ |
24 | /* ␊ |
25 | * Mach Operating System␊ |
26 | * Copyright (c) 1990 Carnegie-Mellon University␊ |
27 | * Copyright (c) 1989 Carnegie-Mellon University␊ |
28 | * Copyright (c) 1988 Carnegie-Mellon University␊ |
29 | * Copyright (c) 1987 Carnegie-Mellon University␊ |
30 | * All rights reserved. The CMU software License Agreement specifies␊ |
31 | * the terms and conditions for use and redistribution.␊ |
32 | *␊ |
33 | */␊ |
34 | /*␊ |
35 | * HISTORY␊ |
36 | * Revision 2.3 88/08/08 13:47:07 rvb␊ |
37 | * Allocate buffers dynamically vs statically.␊ |
38 | * Now b[i] and i_fs and i_buf, are allocated dynamically.␊ |
39 | * boot_calloc(size) allocates and zeros a buffer rounded to a NPG␊ |
40 | * boundary.␊ |
41 | * Generalize boot spec to allow, xx()/mach, xx(n,[a..h])/mach,␊ |
42 | * xx([a..h])/mach, ...␊ |
43 | * Also default "xx" if unspecified and alloc just "/mach",␊ |
44 | * where everything is defaulted␊ |
45 | * Add routine, ptol(), to parse partition letters.␊ |
46 | *␊ |
47 | */␊ |
48 | ␊ |
49 | /*␊ |
50 | * Copyright (c) 1982, 1986 Regents of the University of California.␊ |
51 | * All rights reserved. The Berkeley software License Agreement␊ |
52 | * specifies the terms and conditions for redistribution.␊ |
53 | *␊ |
54 | *␉@(#)sys.c␉7.1 (Berkeley) 6/5/86␊ |
55 | */␊ |
56 | ␊ |
57 | /* Copyright 2007 VMware Inc.␊ |
58 | "Preboot" ramdisk support added by David Elliott␊ |
59 | */␊ |
60 | ␊ |
61 | #include <AvailabilityMacros.h>␊ |
62 | ␊ |
63 | #include "libsaio.h"␊ |
64 | #include "boot.h"␊ |
65 | #include "bootstruct.h"␊ |
66 | #include "ramdisk.h"␊ |
67 | #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5␊ |
68 | # include <Kernel/libkern/crypto/md5.h>␊ |
69 | #else␊ |
70 | # include <sys/md5.h>␊ |
71 | #endif␊ |
72 | #include <uuid/uuid.h>␊ |
73 | #if 0 /* No OS X release has ever included this. */␊ |
74 | #include <Kernel/uuid/namespace.h>␊ |
75 | #else␊ |
76 | /* copied from uuid/namespace.h, just like BootX's fs.c does. */␊ |
77 | UUID_DEFINE( kFSUUIDNamespaceSHA1, 0xB3, 0xE2, 0x0F, 0x39, 0xF2, 0x92, 0x11, 0xD6, 0x97, 0xA4, 0x00, 0x30, 0x65, 0x43, 0xEC, 0xAC );␊ |
78 | #endif␊ |
79 | ␊ |
80 | extern int multiboot_partition;␊ |
81 | extern int multiboot_partition_set;␊ |
82 | ␊ |
83 | struct devsw {␊ |
84 | const char * name;␊ |
85 | // size increased from char to short to handle non-BIOS internal devices␊ |
86 | unsigned short biosdev;␊ |
87 | int type;␊ |
88 | };␊ |
89 | ␊ |
90 | // Device entries must be ordered by bios device numbers. ␊ |
91 | static struct devsw devsw[] =␊ |
92 | {␊ |
93 | { "hd", 0x80, kBIOSDevTypeHardDrive }, /* DEV_HD */␊ |
94 | { "en", 0xE0, kBIOSDevTypeNetwork }, /* DEV_EN */␊ |
95 | { "rd", 0x100, kBIOSDevTypeHardDrive },␊ |
96 | { "bt", 0x101, kBIOSDevTypeHardDrive }, // turbo - type for booter partition␊ |
97 | { 0, 0 }␊ |
98 | };␊ |
99 | ␊ |
100 | // Pseudo BIOS devices␊ |
101 | enum {␊ |
102 | ␉kPseudoBIOSDevRAMDisk = 0x100,␊ |
103 | ␉kPseudoBIOSDevBooter = 0x101␊ |
104 | };␊ |
105 | ␊ |
106 | /*␊ |
107 | * Max number of file descriptors.␊ |
108 | */␊ |
109 | #define NFILES 6␊ |
110 | ␊ |
111 | static struct iob iob[NFILES];␊ |
112 | ␊ |
113 | void * gFSLoadAddress = 0;␊ |
114 | ␊ |
115 | // Turbo - save what we think is our original BIOS boot volume if we have one 0xab␊ |
116 | BVRef gBIOSBootVolume = NULL;␊ |
117 | BVRef gBootVolume;␊ |
118 | ␊ |
119 | //static BVRef getBootVolumeRef( const char * path, const char ** outPath );␊ |
120 | static BVRef newBootVolumeRef( int biosdev, int partno );␊ |
121 | ␊ |
122 | //==========================================================================␊ |
123 | // LoadVolumeFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
124 | // Load the specified file from the specified volume␊ |
125 | // to the load buffer at LOAD_ADDR.␊ |
126 | // If the file is fat, load only the i386 portion.␊ |
127 | ␊ |
128 | long LoadVolumeFile(BVRef bvr, const char *filePath)␊ |
129 | {␊ |
130 | long fileSize;␊ |
131 | ␊ |
132 | // Read file into load buffer. The data in the load buffer will be␊ |
133 | // overwritten by the next LoadFile() call.␊ |
134 | ␊ |
135 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
136 | ␊ |
137 | fileSize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
138 | ␊ |
139 | // Return the size of the file, or -1 if load failed.␊ |
140 | ␊ |
141 | return fileSize;␊ |
142 | }␊ |
143 | ␊ |
144 | //==========================================================================␊ |
145 | // LoadFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
146 | // Load the specified file to the load buffer at LOAD_ADDR.␊ |
147 | // If the file is fat, load only the i386 portion.␊ |
148 | ␊ |
149 | long LoadFile(const char * fileSpec)␊ |
150 | {␊ |
151 | const char * filePath;␊ |
152 | BVRef bvr;␊ |
153 | ␊ |
154 | // Resolve the boot volume from the file spec.␊ |
155 | ␊ |
156 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
157 | return -1;␊ |
158 | ␊ |
159 | return LoadVolumeFile(bvr, filePath);␊ |
160 | }␊ |
161 | ␊ |
162 | long ReadFileAtOffset(const char * fileSpec, void *buffer, uint64_t offset, uint64_t length)␊ |
163 | {␊ |
164 | const char *filePath;␊ |
165 | BVRef bvr;␊ |
166 | ␊ |
167 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
168 | return -1;␊ |
169 | ␊ |
170 | if (bvr->fs_readfile == NULL)␊ |
171 | return -1;␊ |
172 | ␊ |
173 | return bvr->fs_readfile(bvr, (char *)filePath, buffer, offset, length);␊ |
174 | }␊ |
175 | ␊ |
176 | long LoadThinFatFile(const char *fileSpec, void **binary)␊ |
177 | {␊ |
178 | const char *filePath;␊ |
179 | FSReadFile readFile;␊ |
180 | BVRef bvr;␊ |
181 | unsigned long length, length2;␊ |
182 | ␊ |
183 | // Resolve the boot volume from the file spec.␊ |
184 | ␊ |
185 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
186 | return -1;␊ |
187 | ␊ |
188 | *binary = (void *)kLoadAddr;␊ |
189 | ␊ |
190 | // Read file into load buffer. The data in the load buffer will be␊ |
191 | // overwritten by the next LoadFile() call.␊ |
192 | ␊ |
193 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
194 | ␊ |
195 | readFile = bvr->fs_readfile;␊ |
196 | ␊ |
197 | if (readFile != NULL) {␊ |
198 | // Read the first 4096 bytes (fat header)␊ |
199 | length = readFile(bvr, (char *)filePath, *binary, 0, 0x1000);␊ |
200 | if (length > 0) {␊ |
201 | if (ThinFatFile(binary, &length) == 0) {␊ |
202 | ␉␉␉␉if (length == 0)␊ |
203 | ␉␉␉␉␉return 0;␊ |
204 | // We found a fat binary; read only the thin part␊ |
205 | length = readFile(bvr, (char *)filePath,␊ |
206 | (void *)kLoadAddr, (unsigned long)(*binary) - kLoadAddr, length);␊ |
207 | *binary = (void *)kLoadAddr;␊ |
208 | } else {␊ |
209 | // Not a fat binary; read the rest of the file␊ |
210 | length2 = readFile(bvr, (char *)filePath, (void *)(kLoadAddr + length), length, 0);␊ |
211 | if (length2 == -1) return -1;␊ |
212 | length += length2;␊ |
213 | }␊ |
214 | }␊ |
215 | } else {␊ |
216 | length = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
217 | if (length > 0) {␊ |
218 | ThinFatFile(binary, &length);␊ |
219 | }␊ |
220 | }␊ |
221 | ␊ |
222 | return length;␊ |
223 | }␊ |
224 | ␊ |
225 | #if UNUSED␊ |
226 | long GetFSUUID(char *spec, char *uuidStr)␊ |
227 | {␊ |
228 | BVRef bvr;␊ |
229 | long rval = -1;␊ |
230 | const char *devSpec;␊ |
231 | ␊ |
232 | if ((bvr = getBootVolumeRef(spec, &devSpec)) == NULL)␊ |
233 | return -1;␊ |
234 | ␊ |
235 | if(bvr->fs_getuuid)␊ |
236 | rval = bvr->fs_getuuid(bvr, uuidStr);␊ |
237 | ␊ |
238 | return rval;␊ |
239 | }␊ |
240 | #endif␊ |
241 | ␊ |
242 | // filesystem-specific getUUID functions call this shared string generator␊ |
243 | long CreateUUIDString(uint8_t uubytes[], int nbytes, char *uuidStr)␊ |
244 | {␊ |
245 | unsigned fmtbase, fmtidx, i;␊ |
246 | uint8_t uuidfmt[] = { 4, 2, 2, 2, 6 };␊ |
247 | char *p = uuidStr;␊ |
248 | MD5_CTX md5c;␊ |
249 | uint8_t mdresult[16];␊ |
250 | ␊ |
251 | bzero(mdresult, sizeof(mdresult));␊ |
252 | ␊ |
253 | // just like AppleFileSystemDriver␊ |
254 | MD5Init(&md5c);␊ |
255 | MD5Update(&md5c, kFSUUIDNamespaceSHA1, sizeof(kFSUUIDNamespaceSHA1));␊ |
256 | MD5Update(&md5c, uubytes, nbytes);␊ |
257 | MD5Final(mdresult, &md5c);␊ |
258 | ␊ |
259 | // this UUID has been made version 3 style (i.e. via namespace)␊ |
260 | // see "-uuid-urn-" IETF draft (which otherwise copies byte for byte)␊ |
261 | mdresult[6] = 0x30 | ( mdresult[6] & 0x0F );␊ |
262 | mdresult[8] = 0x80 | ( mdresult[8] & 0x3F );␊ |
263 | ␊ |
264 | ␊ |
265 | // generate the text: e.g. 5EB1869F-C4FA-3502-BDEB-3B8ED5D87292␊ |
266 | i = 0; fmtbase = 0;␊ |
267 | for(fmtidx = 0; fmtidx < sizeof(uuidfmt); fmtidx++) {␊ |
268 | for(i=0; i < uuidfmt[fmtidx]; i++) {␊ |
269 | uint8_t byte = mdresult[fmtbase+i];␊ |
270 | char nib;␊ |
271 | ␊ |
272 | nib = byte >> 4;␊ |
273 | *p = nib + '0'; // 0x4 -> '4'␊ |
274 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
275 | p++;␊ |
276 | ␊ |
277 | nib = byte & 0xf;␊ |
278 | *p = nib + '0'; // 0x4 -> '4'␊ |
279 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
280 | p++;␊ |
281 | ␊ |
282 | }␊ |
283 | fmtbase += i;␊ |
284 | if(fmtidx < sizeof(uuidfmt)-1)␊ |
285 | *(p++) = '-';␊ |
286 | else␊ |
287 | *p = '\0';␊ |
288 | }␊ |
289 | ␊ |
290 | return 0;␊ |
291 | }␊ |
292 | ␊ |
293 | ␊ |
294 | //==========================================================================␊ |
295 | // GetDirEntry - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
296 | // Fetch the next directory entry for the given directory.␊ |
297 | ␊ |
298 | long GetDirEntry(const char * dirSpec, long long * dirIndex, const char ** name, ␊ |
299 | long * flags, long * time)␊ |
300 | {␊ |
301 | const char * dirPath;␊ |
302 | BVRef bvr;␊ |
303 | ␊ |
304 | // Resolve the boot volume from the dir spec.␊ |
305 | ␊ |
306 | if ((bvr = getBootVolumeRef(dirSpec, &dirPath)) == NULL)␊ |
307 | return -1;␊ |
308 | ␊ |
309 | // Return 0 on success, or -1 if there are no additional entries.␊ |
310 | ␊ |
311 | return bvr->fs_getdirentry( bvr,␊ |
312 | /* dirPath */ (char *)dirPath,␊ |
313 | /* dirIndex */ dirIndex,␊ |
314 | /* dirEntry */ (char **)name, flags, time, 0, 0 );␊ |
315 | }␊ |
316 | ␊ |
317 | //==========================================================================␊ |
318 | // GetFileInfo - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
319 | // Get attributes for the specified file.␊ |
320 | ␊ |
321 | static char* gMakeDirSpec;␊ |
322 | ␊ |
323 | long GetFileInfo(const char * dirSpec, const char * name,␊ |
324 | long * flags, long * time)␊ |
325 | {␊ |
326 | long long index = 0;␊ |
327 | const char * entryName;␊ |
328 | ␊ |
329 | if (gMakeDirSpec == 0)␊ |
330 | gMakeDirSpec = (char *)malloc(1024);␊ |
331 | ␊ |
332 | if (!dirSpec) {␊ |
333 | long idx, len;␊ |
334 | ␊ |
335 | len = strlen(name);␊ |
336 | ␊ |
337 | for (idx = len; idx && (name[idx] != '/' && name[idx] != '\\'); idx--) {}␊ |
338 | if (idx == 0) {␊ |
339 | gMakeDirSpec[0] = '/';␊ |
340 | gMakeDirSpec[1] = '\0';␊ |
341 | } else {␊ |
342 | idx++;␊ |
343 | strncpy(gMakeDirSpec, name, idx);␊ |
344 | name += idx;␊ |
345 | }␊ |
346 | dirSpec = gMakeDirSpec;␊ |
347 | }␊ |
348 | ␊ |
349 | while (GetDirEntry(dirSpec, &index, &entryName, flags, time) == 0)␊ |
350 | {␊ |
351 | if (strcmp(entryName, name) == 0)␊ |
352 | return 0; // success␊ |
353 | }␊ |
354 | return -1; // file not found␊ |
355 | }␊ |
356 | ␊ |
357 | long GetFileBlock(const char *fileSpec, unsigned long long *firstBlock)␊ |
358 | {␊ |
359 | const char * filePath;␊ |
360 | BVRef bvr;␊ |
361 | ␊ |
362 | // Resolve the boot volume from the file spec.␊ |
363 | ␊ |
364 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL) {␊ |
365 | printf("Boot volume for '%s' is bogus\n", fileSpec);␊ |
366 | return -1;␊ |
367 | }␊ |
368 | ␊ |
369 | return bvr->fs_getfileblock(bvr, (char *)filePath, firstBlock);␊ |
370 | }␊ |
371 | ␊ |
372 | //==========================================================================␊ |
373 | // GetFreeFD()␊ |
374 | ␊ |
375 | static int GetFreeFd(void)␊ |
376 | {␊ |
377 | ␉int␉fd;␊ |
378 | ␊ |
379 | ␉// Locate a free descriptor slot.␊ |
380 | ␉for (fd = 0; fd < NFILES; fd++) {␊ |
381 | ␉␉if (iob[fd].i_flgs == 0) {␊ |
382 | ␉␉␉return fd;␊ |
383 | ␉ ␉}␊ |
384 | ␉}␊ |
385 | ␉stop("Out of file descriptors");␊ |
386 | ␉// not reached␊ |
387 | ␉return -1;␊ |
388 | }␊ |
389 | ␊ |
390 | //==========================================================================␊ |
391 | // iob_from_fdesc()␊ |
392 | //␊ |
393 | // Return a pointer to an allocated 'iob' based on the file descriptor␊ |
394 | // provided. Returns NULL if the file descriptor given is invalid.␊ |
395 | ␊ |
396 | static struct iob * iob_from_fdesc(int fdesc)␊ |
397 | {␊ |
398 | register struct iob * io;␊ |
399 | ␊ |
400 | if (fdesc < 0 || fdesc >= NFILES ||␊ |
401 | ((io = &iob[fdesc])->i_flgs & F_ALLOC) == 0)␊ |
402 | return NULL;␊ |
403 | else␊ |
404 | return io;␊ |
405 | }␊ |
406 | ␊ |
407 | //==========================================================================␊ |
408 | // openmem()␊ |
409 | ␊ |
410 | int openmem(char * buf, int len)␊ |
411 | {␊ |
412 | int fdesc;␊ |
413 | struct iob * io;␊ |
414 | ␊ |
415 | fdesc = GetFreeFd();␊ |
416 | io = &iob[fdesc];␊ |
417 | bzero(io, sizeof(*io));␊ |
418 | ␊ |
419 | // Mark the descriptor as taken. Set the F_MEM flag to indicate␊ |
420 | // that the file buffer is provided by the caller.␊ |
421 | ␊ |
422 | io->i_flgs = F_ALLOC | F_MEM;␊ |
423 | io->i_buf = buf;␊ |
424 | io->i_filesize = len;␊ |
425 | ␊ |
426 | return fdesc;␊ |
427 | }␊ |
428 | ␊ |
429 | //==========================================================================␊ |
430 | // open() - Open the file specified by 'path' for reading.␊ |
431 | ␊ |
432 | static int open_bvr(BVRef bvr, const char *filePath, int flags)␊ |
433 | {␊ |
434 | ␉struct iob␉*io;␊ |
435 | ␉int␉␉fdesc;␊ |
436 | ␉int␉␉i;␊ |
437 | ␊ |
438 | ␉if (bvr == NULL) {␊ |
439 | ␉␉return -1;␊ |
440 | ␉}␊ |
441 | ␊ |
442 | ␉fdesc = GetFreeFd();␊ |
443 | ␉io = &iob[fdesc];␊ |
444 | ␉bzero(io, sizeof(*io));␊ |
445 | ␊ |
446 | ␉// Mark the descriptor as taken.␊ |
447 | ␉io->i_flgs = F_ALLOC;␊ |
448 | ␊ |
449 | ␉// Find the next available memory block in the download buffer.␊ |
450 | ␉io->i_buf = (char *) LOAD_ADDR;␊ |
451 | ␉for (i = 0; i < NFILES; i++) {␊ |
452 | ␉␉if ((iob[i].i_flgs != F_ALLOC) || (i == fdesc)) {␊ |
453 | ␉␉␉continue;␊ |
454 | ␉␉}␊ |
455 | ␉␉io->i_buf = max(iob[i].i_filesize + iob[i].i_buf, io->i_buf);␊ |
456 | ␉}␊ |
457 | ␊ |
458 | ␉// Load entire file into memory. Unnecessary open() calls must be avoided.␊ |
459 | ␉gFSLoadAddress = io->i_buf;␊ |
460 | ␉io->i_filesize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
461 | ␉if (io->i_filesize < 0) {␊ |
462 | ␉␉close(fdesc);␊ |
463 | ␉␉return -1;␊ |
464 | ␉}␊ |
465 | ␉return fdesc;␊ |
466 | }␊ |
467 | ␊ |
468 | int open(const char *path, int flags)␊ |
469 | {␊ |
470 | ␉const char␉*filepath;␊ |
471 | ␉BVRef␉␉bvr;␊ |
472 | ␊ |
473 | ␉// Resolve the boot volume from the file spec.␊ |
474 | ␉if ((bvr = getBootVolumeRef(path, &filepath)) != NULL) {␊ |
475 | ␉␉return open_bvr(bvr, filepath, flags);␊ |
476 | ␉}␊ |
477 | ␉return -1;␊ |
478 | }␊ |
479 | ␊ |
480 | int open_bvdev(const char *bvd, const char *path, int flags)␊ |
481 | {␊ |
482 | const struct devsw␉*dp;␊ |
483 | ␉const char␉␉*cp;␊ |
484 | ␉BVRef␉␉␉bvr;␊ |
485 | ␉int␉␉␉i;␊ |
486 | ␉int␉␉␉len;␊ |
487 | ␉int␉␉␉unit;␊ |
488 | ␉int␉␉␉partition;␊ |
489 | ␊ |
490 | ␉if ((i = open(path, flags)) >= 0) {␊ |
491 | ␉␉return i;␊ |
492 | ␉}␊ |
493 | ␊ |
494 | ␉if (bvd == NULL || (len = strlen(bvd)) < 2) {␊ |
495 | ␉␉return -1;␊ |
496 | ␉}␊ |
497 | ␊ |
498 | ␉for (dp=devsw; dp->name; dp++) {␊ |
499 | ␉␉if (bvd[0] == dp->name[0] && bvd[1] == dp->name[1]) {␊ |
500 | ␉␉␉unit = 0;␊ |
501 | ␉␉␉partition = 0;␊ |
502 | ␉␉␉/* get optional unit and partition */␊ |
503 | ␉␉␉if (len >= 5 && bvd[2] == '(') { /* min must be present xx(0) */␊ |
504 | ␉␉␉␉cp = &bvd[3];␊ |
505 | ␉␉␉␉i = 0;␊ |
506 | ␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
507 | ␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
508 | ␉␉␉␉␉unit = i;␊ |
509 | ␉␉␉␉}␊ |
510 | ␉␉␉␉if (*cp++ == ',') {␊ |
511 | ␉␉␉␉␉i = 0;␊ |
512 | ␉␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
513 | ␉␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
514 | ␉␉␉␉␉␉partition = i;␊ |
515 | ␉␉␉␉␉}␊ |
516 | ␉␉␉␉}␊ |
517 | ␉␉␉}␊ |
518 | ␉␉␉bvr = newBootVolumeRef(dp->biosdev + unit, partition);␊ |
519 | ␉␉␉return open_bvr(bvr, path, flags);␊ |
520 | ␉␉}␊ |
521 | }␊ |
522 | ␉return -1;␊ |
523 | }␊ |
524 | ␊ |
525 | //==========================================================================␊ |
526 | // close() - Close a file descriptor.␊ |
527 | ␊ |
528 | int close(int fdesc)␊ |
529 | {␊ |
530 | struct iob * io;␊ |
531 | ␊ |
532 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
533 | return (-1);␊ |
534 | ␊ |
535 | io->i_flgs = 0;␊ |
536 | ␊ |
537 | return 0;␊ |
538 | }␊ |
539 | ␊ |
540 | //==========================================================================␊ |
541 | // lseek() - Reposition the byte offset of the file descriptor from the␊ |
542 | // beginning of the file. Returns the relocated offset.␊ |
543 | ␊ |
544 | int b_lseek(int fdesc, int offset, int ptr)␊ |
545 | {␊ |
546 | struct iob * io;␊ |
547 | ␊ |
548 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
549 | return (-1);␊ |
550 | ␊ |
551 | io->i_offset = offset;␊ |
552 | ␊ |
553 | return offset;␊ |
554 | }␊ |
555 | ␊ |
556 | //==========================================================================␊ |
557 | // tell() - Returns the byte offset of the file descriptor.␊ |
558 | ␊ |
559 | int tell(int fdesc)␊ |
560 | {␊ |
561 | struct iob * io;␊ |
562 | ␊ |
563 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
564 | return 0;␊ |
565 | ␊ |
566 | return io->i_offset;␊ |
567 | }␊ |
568 | ␊ |
569 | //==========================================================================␊ |
570 | // read() - Read up to 'count' bytes of data from the file descriptor␊ |
571 | // into the buffer pointed to by buf.␊ |
572 | ␊ |
573 | int read(int fdesc, char * buf, int count)␊ |
574 | {␊ |
575 | struct iob * io;␊ |
576 | ␊ |
577 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
578 | return (-1);␊ |
579 | ␊ |
580 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
581 | count = io->i_filesize - io->i_offset;␊ |
582 | ␊ |
583 | if (count <= 0)␊ |
584 | return 0; // end of file␊ |
585 | ␊ |
586 | bcopy(io->i_buf + io->i_offset, buf, count);␊ |
587 | ␊ |
588 | io->i_offset += count;␊ |
589 | ␊ |
590 | return count;␊ |
591 | }␊ |
592 | ␊ |
593 | //==========================================================================␊ |
594 | // write() - Write up to 'count' bytes of data to the file descriptor␊ |
595 | // from the buffer pointed to by buf.␊ |
596 | ␊ |
597 | int write(int fdesc, const char * buf, int count)␊ |
598 | {␊ |
599 | struct iob * io;␊ |
600 | ␊ |
601 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
602 | return (-1);␊ |
603 | ␉␊ |
604 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
605 | count = io->i_filesize - io->i_offset;␊ |
606 | ␉␊ |
607 | if (count <= 0)␊ |
608 | return 0; // end of file␊ |
609 | ␉␊ |
610 | bcopy(buf, io->i_buf + io->i_offset, count);␊ |
611 | ␉␊ |
612 | io->i_offset += count;␊ |
613 | ␉␊ |
614 | return count;␊ |
615 | }␊ |
616 | ␊ |
617 | int writebyte(int fdesc, char value)␊ |
618 | {␊ |
619 | struct iob * io;␊ |
620 | ␊ |
621 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
622 | return (-1);␊ |
623 | ␉␊ |
624 | if ((io->i_offset + 1) > (unsigned int)io->i_filesize)␊ |
625 | return 0; // end of file␊ |
626 | ␉␊ |
627 | io->i_buf[io->i_offset++] = value;␊ |
628 | ␉␊ |
629 | return 1;␊ |
630 | }␊ |
631 | ␊ |
632 | int writeint(int fdesc, int value)␊ |
633 | {␊ |
634 | struct iob * io;␊ |
635 | ␊ |
636 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
637 | return (-1);␊ |
638 | ␉␊ |
639 | if ((io->i_offset + 4) > (unsigned int)io->i_filesize)␊ |
640 | return 0; // end of file␊ |
641 | ␉␊ |
642 | bcopy(&value, io->i_buf + io->i_offset, 4);␊ |
643 | ␉␊ |
644 | io->i_offset += 4;␊ |
645 | ␉␊ |
646 | return 4;␊ |
647 | }␊ |
648 | ␊ |
649 | //==========================================================================␊ |
650 | // file_size() - Returns the size of the file described by the file␊ |
651 | // descriptor.␊ |
652 | ␊ |
653 | int file_size(int fdesc)␊ |
654 | {␊ |
655 | struct iob * io;␊ |
656 | ␊ |
657 | if ((io = iob_from_fdesc(fdesc)) == 0)␊ |
658 | return 0;␊ |
659 | ␊ |
660 | return io->i_filesize;␊ |
661 | }␊ |
662 | ␊ |
663 | //==========================================================================␊ |
664 | ␊ |
665 | struct dirstuff * vol_opendir(BVRef bvr, const char * path)␊ |
666 | {␊ |
667 | struct dirstuff * dirp = 0;␊ |
668 | ␊ |
669 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
670 | if (dirp == NULL)␊ |
671 | goto error;␊ |
672 | ␊ |
673 | dirp->dir_path = newString(path);␊ |
674 | if (dirp->dir_path == NULL)␊ |
675 | goto error;␊ |
676 | ␊ |
677 | dirp->dir_bvr = bvr;␊ |
678 | ␊ |
679 | return dirp;␊ |
680 | ␊ |
681 | error:␊ |
682 | closedir(dirp);␊ |
683 | return NULL;␊ |
684 | }␊ |
685 | ␊ |
686 | //==========================================================================␊ |
687 | ␊ |
688 | struct dirstuff * opendir(const char * path)␊ |
689 | {␊ |
690 | struct dirstuff * dirp = 0;␊ |
691 | const char * dirPath;␊ |
692 | BVRef bvr;␊ |
693 | ␊ |
694 | if ((bvr = getBootVolumeRef(path, &dirPath)) == NULL)␊ |
695 | goto error;␊ |
696 | ␊ |
697 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
698 | if (dirp == NULL)␊ |
699 | goto error;␊ |
700 | ␊ |
701 | dirp->dir_path = newString(dirPath);␊ |
702 | if (dirp->dir_path == NULL)␊ |
703 | goto error;␊ |
704 | ␊ |
705 | dirp->dir_bvr = bvr;␊ |
706 | ␊ |
707 | return dirp;␊ |
708 | ␊ |
709 | error:␊ |
710 | closedir(dirp);␊ |
711 | return NULL;␊ |
712 | }␊ |
713 | ␊ |
714 | //==========================================================================␊ |
715 | ␊ |
716 | int closedir(struct dirstuff * dirp)␊ |
717 | {␊ |
718 | if (dirp) {␊ |
719 | if (dirp->dir_path) free(dirp->dir_path);␊ |
720 | free(dirp);␊ |
721 | }␊ |
722 | return 0;␊ |
723 | }␊ |
724 | ␊ |
725 | //==========================================================================␊ |
726 | ␊ |
727 | int readdir(struct dirstuff * dirp, const char ** name, long * flags,␊ |
728 | long * time)␊ |
729 | {␊ |
730 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
731 | /* dirPath */ dirp->dir_path,␊ |
732 | /* dirIndex */ &dirp->dir_index,␊ |
733 | /* dirEntry */ (char **)name, flags, time,␊ |
734 | 0, 0);␊ |
735 | }␊ |
736 | ␊ |
737 | //==========================================================================␊ |
738 | ␊ |
739 | int readdir_ext(struct dirstuff * dirp, const char ** name, long * flags,␊ |
740 | long * time, FinderInfo *finderInfo, long *infoValid)␊ |
741 | {␊ |
742 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
743 | /* dirPath */ dirp->dir_path,␊ |
744 | /* dirIndex */ &dirp->dir_index,␊ |
745 | /* dirEntry */ (char **)name,␊ |
746 | flags, time,␊ |
747 | finderInfo, infoValid);␊ |
748 | }␊ |
749 | ␊ |
750 | //==========================================================================␊ |
751 | ␊ |
752 | const char * systemConfigDir()␊ |
753 | {␊ |
754 | if (gBootFileType == kNetworkDeviceType)␊ |
755 | ␉return "";␊ |
756 | return "/Library/Preferences/SystemConfiguration";␊ |
757 | }␊ |
758 | ␊ |
759 | //==========================================================================␊ |
760 | ␊ |
761 | int gBootFileType;␊ |
762 | ␊ |
763 | void scanBootVolumes( int biosdev, int * count )␊ |
764 | {␊ |
765 | BVRef bvr = 0;␊ |
766 | ␊ |
767 | bvr = diskScanBootVolumes(biosdev, count);␊ |
768 | if (bvr == NULL)␊ |
769 | {␊ |
770 | bvr = nbpScanBootVolumes(biosdev, count);␊ |
771 | if (bvr != NULL)␊ |
772 | {␊ |
773 | gBootFileType = kNetworkDeviceType;␊ |
774 | }␊ |
775 | }␊ |
776 | else␊ |
777 | {␊ |
778 | gBootFileType = kBlockDeviceType;␊ |
779 | }␊ |
780 | }␊ |
781 | ␊ |
782 | //==========================================================================␊ |
783 | ␊ |
784 | void scanDisks(int biosdev, int *count)␊ |
785 | {␊ |
786 | #define MAX_HDD_COUNT 32␊ |
787 | int bvCount;␊ |
788 | int hd = 0;␊ |
789 | ␊ |
790 | // Testing up to MAX_HDD_COUNT hard drives.␊ |
791 | ␉while(!testBiosread(0x80 + hd, 0) && hd < MAX_HDD_COUNT)␊ |
792 | ␉{␊ |
793 | ␉ bvCount = 0;␊ |
794 | ␉ scanBootVolumes(0x80 + hd, &bvCount);␊ |
795 | hd++;␊ |
796 | ␉}␊ |
797 | ␊ |
798 | // Also scanning CD/DVD drive.␊ |
799 | ␉if (biosDevIsCDROM(gBIOSDev))␊ |
800 | ␉{␊ |
801 | ␉ bvCount = 0;␊ |
802 | ␉scanBootVolumes(gBIOSDev, &bvCount);␊ |
803 | ␉}␊ |
804 | }␊ |
805 | ␊ |
806 | //==========================================================================␊ |
807 | ␊ |
808 | BVRef selectBootVolume( BVRef chain )␊ |
809 | {␊ |
810 | ␉bool filteredChain = false;␊ |
811 | ␉bool foundPrimary = false;␊ |
812 | ␉BVRef bvr, bvr1 = 0, bvr2 = 0;␊ |
813 | ␉␊ |
814 | ␉if (chain->filtered) filteredChain = true;␊ |
815 | ␉␊ |
816 | ␉if (multiboot_partition_set)␊ |
817 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
818 | ␉␉␉if ( bvr->part_no == multiboot_partition && bvr->biosdev == gBIOSDev ) ␊ |
819 | ␉␉␉␉return bvr;␊ |
820 | ␉␊ |
821 | ␉/*␊ |
822 | ␉ * Checking "Default Partition" key in system configuration - use format: hd(x,y) or the volume UUID -␊ |
823 | ␉ * to override the default selection.␊ |
824 | ␉ * We accept only kBVFlagSystemVolume or kBVFlagForeignBoot volumes.␊ |
825 | ␉ */␊ |
826 | ␉const char * val;␊ |
827 | ␉char testStr[64];␊ |
828 | ␉int cnt;␊ |
829 | ␉␊ |
830 | ␉if (getValueForKey(kDefaultPartition, &val, &cnt, &bootInfo->bootConfig) && cnt >= 7 && filteredChain)␊ |
831 | ␉{␊ |
832 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
833 | ␉␉{␊ |
834 | ␉␉␉if ( bvr->biosdev >= 0x80 && bvr->biosdev < 0x100␊ |
835 | ␉␉␉␉&& ( bvr->flags & ( kBVFlagSystemVolume|kBVFlagForeignBoot ) ) )␊ |
836 | ␉␉␉{␊ |
837 | ␉␉␉␉// Trying to match hd(x,y) format.␊ |
838 | ␉␉␉␉sprintf(testStr, "hd(%d,%d)", bvr->biosdev - 0x80, bvr->part_no);␊ |
839 | ␉␉␉␉if (strcmp(testStr, val) == 0)␊ |
840 | ␉␉␉␉␉return bvr;␊ |
841 | ␉␉␉␉␊ |
842 | ␉␉␉␉// Trying to match volume UUID.␊ |
843 | ␉␉␉␉if (bvr->fs_getuuid && bvr->fs_getuuid(bvr, testStr) == 0 && strcmp(testStr, val) == 0)␊ |
844 | ␉␉␉␉␉return bvr;␊ |
845 | ␉␉␉}␊ |
846 | ␉␉}␊ |
847 | ␉}␊ |
848 | ␉␊ |
849 | ␉/*␊ |
850 | ␉ * Scannig the volume chain backwards and trying to find ␊ |
851 | ␉ * a HFS+ volume with valid boot record signature.␊ |
852 | ␉ * If not found any active partition then we will␊ |
853 | ␉ * select this volume as the boot volume.␊ |
854 | ␉ */␊ |
855 | ␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
856 | ␉{␊ |
857 | ␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) foundPrimary = true;␊ |
858 | ␉␉// zhell -- Undo a regression that was introduced from r491 to 492.␊ |
859 | ␉␉// if gBIOSBootVolume is set already, no change is required␊ |
860 | ␉␉if ( bvr->flags & (kBVFlagBootable|kBVFlagSystemVolume)␊ |
861 | ␉␉␉&& gBIOSBootVolume␊ |
862 | ␉␉␉&& (!filteredChain || (filteredChain && bvr->visible))␊ |
863 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
864 | ␉␉␉bvr2 = bvr;␊ |
865 | ␉␉// zhell -- if gBIOSBootVolume is NOT set, we use the "if" statement␊ |
866 | ␉␉// from r491,␊ |
867 | ␉␉if ( bvr->flags & kBVFlagBootable␊ |
868 | ␉␉␉&& ! gBIOSBootVolume␊ |
869 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
870 | ␉␉␉bvr2 = bvr;␊ |
871 | ␉} ␊ |
872 | ␉␊ |
873 | ␉␊ |
874 | ␉/*␊ |
875 | ␉ * Use the standrad method for selecting the boot volume.␊ |
876 | ␉ */␊ |
877 | ␉if (foundPrimary)␊ |
878 | ␉{␊ |
879 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
880 | ␉␉{␊ |
881 | ␉␉␉if ( bvr->flags & kBVFlagNativeBoot && bvr->biosdev == gBIOSDev ) bvr1 = bvr;␊ |
882 | ␉␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) bvr2 = bvr;␊ |
883 | ␉␉}␊ |
884 | ␉}␊ |
885 | ␉␊ |
886 | ␉bvr = bvr2 ? bvr2 :␊ |
887 | ␉bvr1 ? bvr1 : chain;␊ |
888 | ␉␊ |
889 | ␉return bvr;␊ |
890 | }␊ |
891 | ␊ |
892 | //==========================================================================␊ |
893 | ␊ |
894 | #define LP '('␊ |
895 | #define RP ')'␊ |
896 | int gBIOSDev;␊ |
897 | ␊ |
898 | /*!␊ |
899 | This is like boot2's gBootVolume except it is for the internal use of␊ |
900 | libsaio to track which volume an unqualified path should be relative to.␊ |
901 | This replaces bootInfo->kernDev as the carrier of this information.␊ |
902 | */␊ |
903 | static BVRef gRootVolume;␊ |
904 | ␊ |
905 | void setRootVolume(BVRef volume)␊ |
906 | {␊ |
907 | gRootVolume = volume;␊ |
908 | // Veto non-native FS. Basically that means don't allow the root volume to␊ |
909 | // be set to a volume we can't read files from.␊ |
910 | if(gRootVolume != NULL && ((gRootVolume->flags & kBVFlagNativeBoot) == 0))␊ |
911 | gRootVolume = NULL;␊ |
912 | }␊ |
913 | ␊ |
914 | void setBootGlobals(BVRef chain)␊ |
915 | {␊ |
916 | // Record default boot device.␊ |
917 | gBootVolume = selectBootVolume(chain);␊ |
918 | ␊ |
919 | // turbo - Save the ORIGINAL boot volume too for loading our mkext␊ |
920 | if (!gBIOSBootVolume) gBIOSBootVolume = gBootVolume;␊ |
921 | ␊ |
922 | setRootVolume(gBootVolume);␉␊ |
923 | }␊ |
924 | ␊ |
925 | /*!␊ |
926 | Extracts the volume selector from the pathname, returns the selected␊ |
927 | BVRef, and sets *outPath to the remainder of the path.␊ |
928 | If the path did not include a volume selector then the current volume␊ |
929 | is used. When called with a volume selector the current volume␊ |
930 | is changed to the selected volume unless the volume selector is␊ |
931 | that of a ramdisk.␊ |
932 | */␊ |
933 | BVRef getBootVolumeRef( const char * path, const char ** outPath )␊ |
934 | {␊ |
935 | const char * cp;␊ |
936 | BVRef bvr = gRootVolume;␊ |
937 | int biosdev = gBIOSDev;␊ |
938 | ␊ |
939 | // Search for left parenthesis in the path specification.␊ |
940 | ␊ |
941 | for (cp = path; *cp; cp++) {␊ |
942 | if (*cp == LP || *cp == '/') break;␊ |
943 | }␊ |
944 | ␊ |
945 | if (*cp != LP) // no left paren found␊ |
946 | {␊ |
947 | // Path is using the implicit current device so if there is␊ |
948 | // no current device, then we must fail.␊ |
949 | cp = path;␊ |
950 | if ( gRootVolume == NULL )␊ |
951 | return NULL;␊ |
952 | }␊ |
953 | else if ((cp - path) == 2) // found "xx("␊ |
954 | {␊ |
955 | const struct devsw * dp;␊ |
956 | const char * xp = path;␊ |
957 | int i;␊ |
958 | int unit = -1;␊ |
959 | int part = -1;␊ |
960 | ␊ |
961 | cp++;␊ |
962 | ␊ |
963 | // Check the 2 character device name pointed by 'xp'.␊ |
964 | ␊ |
965 | for (dp = devsw; dp->name; dp++)␊ |
966 | {␊ |
967 | if ((xp[0] == dp->name[0]) && (xp[1] == dp->name[1]))␊ |
968 | break; // found matching entry␊ |
969 | }␊ |
970 | if (dp->name == NULL)␊ |
971 | {␊ |
972 | error("Unknown device '%c%c'\n", xp[0], xp[1]);␊ |
973 | return NULL;␊ |
974 | }␊ |
975 | ␊ |
976 | // Extract the optional unit number from the specification.␊ |
977 | // hd(unit) or hd(unit, part).␊ |
978 | ␊ |
979 | i = 0;␊ |
980 | while (*cp >= '0' && *cp <= '9')␊ |
981 | {␊ |
982 | i = i * 10 + *cp++ - '0';␊ |
983 | unit = i;␊ |
984 | }␊ |
985 | ␊ |
986 | // Unit is no longer optional and never really was.␊ |
987 | // If the user failed to specify it then the unit number from the previous kernDev␊ |
988 | // would have been used which makes little sense anyway.␊ |
989 | // For example, if the user did fd()/foobar and the current root device was the␊ |
990 | // second hard disk (i.e. unit 1) then fd() would select the second floppy drive!␊ |
991 | if(unit == -1)␊ |
992 | return NULL;␊ |
993 | ␊ |
994 | // Extract the optional partition number from the specification.␊ |
995 | ␊ |
996 | if (*cp == ',')␊ |
997 | part = atoi(++cp);␊ |
998 | ␊ |
999 | // If part is not specified part will be -1 whereas before it would have been␊ |
1000 | // whatever the last partition was which makes about zero sense if the device␊ |
1001 | // has been switched.␊ |
1002 | ␊ |
1003 | // Skip past the right paren.␊ |
1004 | ␊ |
1005 | for ( ; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1006 | if (*cp == RP) cp++;␊ |
1007 | ␊ |
1008 | biosdev = dp->biosdev + unit;␊ |
1009 | bvr = newBootVolumeRef(biosdev, part);␊ |
1010 | ␊ |
1011 | if(bvr == NULL)␊ |
1012 | return NULL;␊ |
1013 | }␊ |
1014 | else␊ |
1015 | {␊ |
1016 | // Bad device specifier, skip past the right paren.␊ |
1017 | ␊ |
1018 | for ( cp++; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1019 | if (*cp == RP) cp++;␊ |
1020 | // If gRootVolume was NULL, then bvr will be NULL as well which␊ |
1021 | // should be caught by the caller.␊ |
1022 | }␊ |
1023 | ␊ |
1024 | // Returns the file path following the device spec.␊ |
1025 | // e.g. 'hd(1,b)mach_kernel' is reduced to 'mach_kernel'.␊ |
1026 | ␊ |
1027 | *outPath = cp;␊ |
1028 | ␊ |
1029 | return bvr;␊ |
1030 | }␊ |
1031 | ␊ |
1032 | //==========================================================================␊ |
1033 | // Function name is a misnomer as scanBootVolumes usually calls diskScanBootVolumes␊ |
1034 | // which caches the information. So it's only allocated on the first run.␊ |
1035 | static BVRef newBootVolumeRef( int biosdev, int partno )␊ |
1036 | {␊ |
1037 | ␉BVRef bvr, bvr1, bvrChain;␊ |
1038 | ␊ |
1039 | ␉bvr = bvr1 = NULL;␊ |
1040 | ␊ |
1041 | // Try resolving "rd" and "bt" devices first.␊ |
1042 | ␉if (biosdev == kPseudoBIOSDevRAMDisk)␊ |
1043 | ␉{␊ |
1044 | ␉␉if (gRAMDiskVolume)␊ |
1045 | ␉␉ bvr1 = gRAMDiskVolume;␊ |
1046 | ␉}␊ |
1047 | ␉else if (biosdev == kPseudoBIOSDevBooter)␊ |
1048 | ␉{␊ |
1049 | ␉␉if (gRAMDiskVolume != NULL && gRAMDiskBTAliased)␊ |
1050 | ␉␉␉bvr1 = gRAMDiskVolume;␊ |
1051 | ␉␉else␊ |
1052 | ␉␉␉bvr1 = gBIOSBootVolume;␊ |
1053 | ␉}␊ |
1054 | ␉else␊ |
1055 | ␉{␊ |
1056 | ␉␉// Fetch the volume list from the device.␊ |
1057 | ␊ |
1058 | ␉␉scanBootVolumes( biosdev, NULL );␊ |
1059 | ␉␉bvrChain = getBVChainForBIOSDev(biosdev);␊ |
1060 | ␊ |
1061 | ␉␉// Look for a perfect match based on device and partition number.␊ |
1062 | ␊ |
1063 | ␉␉for ( bvr1 = NULL, bvr = bvrChain; bvr; bvr = bvr->next )␊ |
1064 | ␉␉{␊ |
1065 | ␉␉␉if ( ( bvr->flags & kBVFlagNativeBoot ) == 0 ) continue;␊ |
1066 | ␊ |
1067 | ␉␉␉bvr1 = bvr;␊ |
1068 | ␉␉␉if ( bvr->part_no == partno ) break;␊ |
1069 | ␉␉}␊ |
1070 | ␉}␊ |
1071 | ␊ |
1072 | ␉return bvr ? bvr : bvr1;␊ |
1073 | }␊ |
1074 | ␊ |
1075 | //==========================================================================␊ |
1076 | // getDeviceDescription() - Extracts unit number and partition number␊ |
1077 | // from bvr structure into "dw(u,p)" format.␊ |
1078 | int getDeviceDescription(BVRef bvr, char *str)␊ |
1079 | {␊ |
1080 | ␉const struct devsw *dp;␊ |
1081 | ␉␊ |
1082 | ␉*str = '\0';␊ |
1083 | ␊ |
1084 | ␉if (bvr)␊ |
1085 | ␉{␊ |
1086 | ␉␉for (dp = devsw; dp->name && bvr->biosdev >= dp->biosdev; dp++);␊ |
1087 | ␉␉dp--;␊ |
1088 | ␉␉if (dp->name) sprintf(str, "%s(%d,%d)", dp->name, bvr->biosdev - dp->biosdev, bvr->part_no);␊ |
1089 | ␉␉␊ |
1090 | ␉␉return true;␊ |
1091 | ␉}␊ |
1092 | ␉␊ |
1093 | ␉return false;␊ |
1094 | }␊ |
1095 | |