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 "disk.h"␊ |
67 | #include "modules.h"␊ |
68 | #include "xml.h"␊ |
69 | #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5␊ |
70 | # include <Kernel/libkern/crypto/md5.h>␊ |
71 | #else␊ |
72 | # include <sys/md5.h>␊ |
73 | #endif␊ |
74 | #include <uuid/uuid.h>␊ |
75 | #if 0 /* No OS X release has ever included this. */␊ |
76 | #include <Kernel/uuid/namespace.h>␊ |
77 | #else␊ |
78 | /* copied from uuid/namespace.h, just like BootX's fs.c does. */␊ |
79 | UUID_DEFINE( kFSUUIDNamespaceSHA1, 0xB3, 0xE2, 0x0F, 0x39, 0xF2, 0x92, 0x11, 0xD6, 0x97, 0xA4, 0x00, 0x30, 0x65, 0x43, 0xEC, 0xAC );␊ |
80 | #endif␊ |
81 | ␊ |
82 | #if UNUSED␊ |
83 | extern int multiboot_partition;␊ |
84 | extern int multiboot_partition_set;␊ |
85 | #endif␊ |
86 | ␊ |
87 | struct devsw {␊ |
88 | const char * name;␊ |
89 | // size increased from char to short to handle non-BIOS internal devices␊ |
90 | unsigned short biosdev;␊ |
91 | int type;␊ |
92 | };␊ |
93 | ␊ |
94 | // Device entries must be ordered by bios device numbers. ␊ |
95 | static struct devsw devsw[] =␊ |
96 | {␊ |
97 | { "hd", 0x80, kBIOSDevTypeHardDrive }, /* DEV_HD */␊ |
98 | { "en", 0xE0, kBIOSDevTypeNetwork }, /* DEV_EN */␊ |
99 | { "rd", 0x100, kBIOSDevTypeHardDrive },␊ |
100 | { "bt", 0x101, kBIOSDevTypeHardDrive }, // turbo - type for booter partition␊ |
101 | { 0, 0 }␊ |
102 | };␊ |
103 | ␊ |
104 | // Pseudo BIOS devices␊ |
105 | enum {␊ |
106 | ␉kPseudoBIOSDevRAMDisk = 0x100,␊ |
107 | ␉kPseudoBIOSDevBooter = 0x101␊ |
108 | };␊ |
109 | ␊ |
110 | /*␊ |
111 | * Max number of file descriptors.␊ |
112 | */␊ |
113 | #define NFILES 6␊ |
114 | ␊ |
115 | static struct iob iob[NFILES];␊ |
116 | ␊ |
117 | void * gFSLoadAddress = 0;␊ |
118 | ␊ |
119 | // Turbo - save what we think is our original BIOS boot volume if we have one 0xab␊ |
120 | BVRef gBIOSBootVolume = NULL;␊ |
121 | BVRef gBootVolume;␊ |
122 | ␊ |
123 | static BVRef newBootVolumeRef( int biosdev, int partno );␊ |
124 | static int GetFreeFd(void);␊ |
125 | static struct iob * iob_from_fdesc(int fdesc);␊ |
126 | #if UNUSED␊ |
127 | static int open_bvr(BVRef bvr, const char *filePath, int flags);␊ |
128 | #else␊ |
129 | static int open_bvr(BVRef bvr, const char *filePath);␊ |
130 | #endif␊ |
131 | ␊ |
132 | //==========================================================================␊ |
133 | // LoadVolumeFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
134 | // Load the specified file from the specified volume␊ |
135 | // to the load buffer at LOAD_ADDR.␊ |
136 | // If the file is fat, load only the i386 portion.␊ |
137 | ␊ |
138 | long LoadVolumeFile(BVRef bvr, const char *filePath)␊ |
139 | {␊ |
140 | long fileSize;␊ |
141 | ␊ |
142 | // Read file into load buffer. The data in the load buffer will be␊ |
143 | // overwritten by the next LoadFile() call.␊ |
144 | ␊ |
145 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
146 | ␊ |
147 | fileSize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
148 | ␊ |
149 | // Return the size of the file, or -1 if load failed.␊ |
150 | ␊ |
151 | return fileSize;␊ |
152 | }␊ |
153 | ␊ |
154 | //==========================================================================␊ |
155 | // LoadFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
156 | // Load the specified file to the load buffer at LOAD_ADDR.␊ |
157 | // If the file is fat, load only the i386 portion.␊ |
158 | ␊ |
159 | long LoadFile(const char * fileSpec)␊ |
160 | {␊ |
161 | const char * filePath;␊ |
162 | BVRef bvr;␊ |
163 | ␊ |
164 | // Resolve the boot volume from the file spec.␊ |
165 | ␊ |
166 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
167 | return -1;␊ |
168 | ␊ |
169 | return LoadVolumeFile(bvr, filePath);␊ |
170 | }␊ |
171 | ␊ |
172 | long ReadFileAtOffset(const char * fileSpec, void *buffer, uint64_t offset, uint64_t length)␊ |
173 | {␊ |
174 | const char *filePath;␊ |
175 | BVRef bvr;␊ |
176 | ␊ |
177 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
178 | return -1;␊ |
179 | ␊ |
180 | if (bvr->fs_readfile == NULL)␊ |
181 | return -1;␊ |
182 | ␊ |
183 | return bvr->fs_readfile(bvr, (char *)filePath, buffer, offset, length);␊ |
184 | }␊ |
185 | ␊ |
186 | long LoadThinFatFile(const char *fileSpec, void **binary)␊ |
187 | {␊ |
188 | const char *filePath;␊ |
189 | FSReadFile readFile;␊ |
190 | BVRef bvr;␊ |
191 | unsigned long length/*, length2*/; ␊ |
192 | ␉long length2;␊ |
193 | ␉␊ |
194 | // Resolve the boot volume from the file spec.␊ |
195 | ␊ |
196 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
197 | return -1;␊ |
198 | ␊ |
199 | *binary = (void *)kLoadAddr;␊ |
200 | ␊ |
201 | // Read file into load buffer. The data in the load buffer will be␊ |
202 | // overwritten by the next LoadFile() call.␊ |
203 | ␊ |
204 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
205 | ␊ |
206 | readFile = bvr->fs_readfile;␊ |
207 | ␊ |
208 | if (readFile != NULL) {␊ |
209 | // Read the first 4096 bytes (fat header)␊ |
210 | length = readFile(bvr, (char *)filePath, *binary, 0, 0x1000);␊ |
211 | if (length > 0) {␊ |
212 | if (ThinFatFile(binary, &length) == 0) {␊ |
213 | ␉␉␉␉if (length == 0)␊ |
214 | ␉␉␉␉␉return 0;␊ |
215 | // We found a fat binary; read only the thin part␊ |
216 | length = readFile(bvr, (char *)filePath,␊ |
217 | (void *)kLoadAddr, (unsigned long)(*binary) - kLoadAddr, length);␊ |
218 | *binary = (void *)kLoadAddr;␊ |
219 | } else {␊ |
220 | // Not a fat binary; read the rest of the file␊ |
221 | length2 = readFile(bvr, (char *)filePath, (void *)(kLoadAddr + length), length, 0);␊ |
222 | //if (length2 == -1) return -1;␊ |
223 | ␉␉␉␉if (length2 < 0) return -1;␊ |
224 | ␊ |
225 | length += (unsigned long)length2;␊ |
226 | }␊ |
227 | }␊ |
228 | } else {␊ |
229 | length = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
230 | if (length > 0) {␊ |
231 | ThinFatFile(binary, &length);␊ |
232 | }␊ |
233 | }␊ |
234 | ␊ |
235 | return length;␊ |
236 | }␊ |
237 | ␊ |
238 | // filesystem-specific getUUID functions call this shared string generator␊ |
239 | long CreateUUIDString(uint8_t uubytes[], int nbytes, char *uuidStr)␊ |
240 | {␊ |
241 | unsigned fmtbase, fmtidx, i;␊ |
242 | uint8_t uuidfmt[] = { 4, 2, 2, 2, 6 };␊ |
243 | char *p = uuidStr;␊ |
244 | MD5_CTX md5c;␊ |
245 | uint8_t mdresult[16];␊ |
246 | ␊ |
247 | bzero(mdresult, sizeof(mdresult));␊ |
248 | ␊ |
249 | // just like AppleFileSystemDriver␊ |
250 | MD5Init(&md5c);␊ |
251 | MD5Update(&md5c, kFSUUIDNamespaceSHA1, sizeof(kFSUUIDNamespaceSHA1));␊ |
252 | MD5Update(&md5c, uubytes, nbytes);␊ |
253 | MD5Final(mdresult, &md5c);␊ |
254 | ␊ |
255 | // this UUID has been made version 3 style (i.e. via namespace)␊ |
256 | // see "-uuid-urn-" IETF draft (which otherwise copies byte for byte)␊ |
257 | mdresult[6] = 0x30 | ( mdresult[6] & 0x0F );␊ |
258 | mdresult[8] = 0x80 | ( mdresult[8] & 0x3F );␊ |
259 | ␊ |
260 | ␊ |
261 | // generate the text: e.g. 5EB1869F-C4FA-3502-BDEB-3B8ED5D87292␊ |
262 | i = 0; fmtbase = 0;␊ |
263 | for(fmtidx = 0; fmtidx < sizeof(uuidfmt); fmtidx++) {␊ |
264 | for(i=0; i < uuidfmt[fmtidx]; i++) {␊ |
265 | uint8_t byte = mdresult[fmtbase+i];␊ |
266 | char nib;␊ |
267 | ␊ |
268 | nib = byte >> 4;␊ |
269 | *p = nib + '0'; // 0x4 -> '4'␊ |
270 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
271 | p++;␊ |
272 | ␊ |
273 | nib = byte & 0xf;␊ |
274 | *p = nib + '0'; // 0x4 -> '4'␊ |
275 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
276 | p++;␊ |
277 | ␊ |
278 | }␊ |
279 | fmtbase += i;␊ |
280 | if(fmtidx < sizeof(uuidfmt)-1)␊ |
281 | *(p++) = '-';␊ |
282 | else␊ |
283 | *p = '\0';␊ |
284 | }␊ |
285 | ␊ |
286 | return 0;␊ |
287 | }␊ |
288 | ␊ |
289 | ␊ |
290 | //==========================================================================␊ |
291 | // GetDirEntry - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
292 | // Fetch the next directory entry for the given directory.␊ |
293 | ␊ |
294 | long GetDirEntry(const char * dirSpec, long long * dirIndex, const char ** name, ␊ |
295 | long * flags, long * time)␊ |
296 | {␊ |
297 | const char * dirPath;␊ |
298 | BVRef bvr;␊ |
299 | ␊ |
300 | // Resolve the boot volume from the dir spec.␊ |
301 | ␊ |
302 | if ((bvr = getBootVolumeRef(dirSpec, &dirPath)) == NULL)␊ |
303 | return -1;␊ |
304 | ␊ |
305 | // Return 0 on success, or -1 if there are no additional entries.␊ |
306 | ␊ |
307 | return bvr->fs_getdirentry( bvr,␊ |
308 | /* dirPath */ (char *)dirPath,␊ |
309 | /* dirIndex */ dirIndex,␊ |
310 | /* dirEntry */ (char **)name, flags, time, 0, 0 );␊ |
311 | }␊ |
312 | ␊ |
313 | //==========================================================================␊ |
314 | // GetFileInfo - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
315 | // Get attributes for the specified file.␊ |
316 | ␊ |
317 | static char* gMakeDirSpec;␊ |
318 | ␊ |
319 | long GetFileInfo(const char * dirSpec, const char * name,␊ |
320 | long * flags, long * time)␊ |
321 | {␊ |
322 | long long index = 0;␊ |
323 | const char * entryName;␊ |
324 | ␊ |
325 | if (gMakeDirSpec == 0)␊ |
326 | gMakeDirSpec = (char *)malloc(1024);␊ |
327 | ␊ |
328 | if (!dirSpec) {␊ |
329 | long idx, len;␊ |
330 | ␊ |
331 | len = strlen(name);␊ |
332 | ␊ |
333 | for (idx = len; idx && (name[idx] != '/' && name[idx] != '\\'); idx--) {}␊ |
334 | if (idx == 0) {␊ |
335 | gMakeDirSpec[0] = '/';␊ |
336 | gMakeDirSpec[1] = '\0';␊ |
337 | } else {␊ |
338 | idx++;␊ |
339 | strncpy(gMakeDirSpec, name, idx);␊ |
340 | name += idx;␊ |
341 | }␊ |
342 | dirSpec = gMakeDirSpec;␊ |
343 | }␊ |
344 | ␊ |
345 | while (GetDirEntry(dirSpec, &index, &entryName, flags, time) == 0)␊ |
346 | {␊ |
347 | if (strcmp(entryName, name) == 0)␊ |
348 | return 0; // success␊ |
349 | }␊ |
350 | return -1; // file not found␊ |
351 | }␊ |
352 | ␊ |
353 | //==========================================================================␊ |
354 | // GetFreeFD()␊ |
355 | ␊ |
356 | static int GetFreeFd(void)␊ |
357 | {␊ |
358 | ␉int␉fd;␊ |
359 | ␊ |
360 | ␉// Locate a free descriptor slot.␊ |
361 | ␉for (fd = 0; fd < NFILES; fd++) {␊ |
362 | ␉␉if (iob[fd].i_flgs == 0) {␊ |
363 | ␉␉␉return fd;␊ |
364 | ␉ ␉}␊ |
365 | ␉}␊ |
366 | ␉stop("Out of file descriptors");␊ |
367 | ␉// not reached␊ |
368 | ␉return -1;␊ |
369 | }␊ |
370 | ␊ |
371 | //==========================================================================␊ |
372 | // iob_from_fdesc()␊ |
373 | //␊ |
374 | // Return a pointer to an allocated 'iob' based on the file descriptor␊ |
375 | // provided. Returns NULL if the file descriptor given is invalid.␊ |
376 | ␊ |
377 | static struct iob * iob_from_fdesc(int fdesc)␊ |
378 | {␊ |
379 | register struct iob * io;␊ |
380 | ␊ |
381 | if (fdesc < 0 || fdesc >= NFILES ||␊ |
382 | ((io = &iob[fdesc])->i_flgs & F_ALLOC) == 0)␊ |
383 | return NULL;␊ |
384 | else␊ |
385 | return io;␊ |
386 | }␊ |
387 | ␊ |
388 | //==========================================================================␊ |
389 | // open() - Open the file specified by 'path' for reading.␊ |
390 | #if UNUSED␊ |
391 | static int open_bvr(BVRef bvr, const char *filePath, int flags)␊ |
392 | #else␊ |
393 | static int open_bvr(BVRef bvr, const char *filePath)␊ |
394 | #endif␊ |
395 | {␊ |
396 | ␉struct iob␉*io;␊ |
397 | ␉int␉␉fdesc;␊ |
398 | ␉int␉␉i;␊ |
399 | ␊ |
400 | ␉if (bvr == NULL) {␊ |
401 | ␉␉return -1;␊ |
402 | ␉}␊ |
403 | ␊ |
404 | ␉fdesc = GetFreeFd();␊ |
405 | ␉io = &iob[fdesc];␊ |
406 | ␉bzero(io, sizeof(*io));␊ |
407 | ␊ |
408 | ␉// Mark the descriptor as taken.␊ |
409 | ␉io->i_flgs = F_ALLOC;␊ |
410 | ␊ |
411 | ␉// Find the next available memory block in the download buffer.␊ |
412 | ␉io->i_buf = (char *) LOAD_ADDR;␊ |
413 | ␉for (i = 0; i < NFILES; i++) {␊ |
414 | ␉␉if ((iob[i].i_flgs != F_ALLOC) || (i == fdesc)) {␊ |
415 | ␉␉␉continue;␊ |
416 | ␉␉}␊ |
417 | ␉␉io->i_buf = max(iob[i].i_filesize + iob[i].i_buf, io->i_buf);␊ |
418 | ␉}␊ |
419 | ␊ |
420 | ␉// Load entire file into memory. Unnecessary open() calls must be avoided.␊ |
421 | ␉gFSLoadAddress = io->i_buf;␊ |
422 | ␉io->i_filesize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
423 | ␉if (io->i_filesize < 0) {␊ |
424 | ␉␉close(fdesc);␊ |
425 | ␉␉return -1;␊ |
426 | ␉}␊ |
427 | ␉return fdesc;␊ |
428 | }␊ |
429 | ␊ |
430 | #if UNUSED␊ |
431 | int open(const char *path, int flags)␊ |
432 | #else␊ |
433 | int open(const char *path)␊ |
434 | #endif␊ |
435 | {␊ |
436 | ␉const char␉*filepath;␊ |
437 | ␉BVRef␉␉bvr;␊ |
438 | ␊ |
439 | ␉// Resolve the boot volume from the file spec.␊ |
440 | ␉if ((bvr = getBootVolumeRef(path, &filepath)) != NULL) {␊ |
441 | #if UNUSED␊ |
442 | ␉␉return open_bvr(bvr, filepath, flags);␊ |
443 | #else␊ |
444 | return open_bvr(bvr, filepath);␊ |
445 | #endif␊ |
446 | ␉}␊ |
447 | ␉return -1;␊ |
448 | }␊ |
449 | ␊ |
450 | #if UNUSED␊ |
451 | int open_bvdev(const char *bvd, const char *path, int flags)␊ |
452 | #else␊ |
453 | int open_bvdev(const char *bvd, const char *path)␊ |
454 | #endif␊ |
455 | {␊ |
456 | const struct devsw␉*dp;␊ |
457 | ␉const char␉␉*cp;␊ |
458 | ␉BVRef␉␉␉bvr;␊ |
459 | ␉int␉␉␉i;␊ |
460 | ␉int␉␉␉len;␊ |
461 | ␉int␉␉␉unit;␊ |
462 | ␉int␉␉␉partition;␊ |
463 | ␊ |
464 | ␉if ((i = open(path)) >= 0) {␊ |
465 | ␉␉return i;␊ |
466 | ␉}␊ |
467 | ␊ |
468 | ␉if (bvd == NULL || (len = strlen(bvd)) < 2) {␊ |
469 | ␉␉return -1;␊ |
470 | ␉}␊ |
471 | ␊ |
472 | ␉for (dp=devsw; dp->name; dp++) {␊ |
473 | ␉␉if (bvd[0] == dp->name[0] && bvd[1] == dp->name[1]) {␊ |
474 | ␉␉␉unit = 0;␊ |
475 | ␉␉␉partition = 0;␊ |
476 | ␉␉␉/* get optional unit and partition */␊ |
477 | ␉␉␉if (len >= 5 && bvd[2] == '(') { /* min must be present xx(0) */␊ |
478 | ␉␉␉␉cp = &bvd[3];␊ |
479 | ␉␉␉␉i = 0;␊ |
480 | ␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
481 | ␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
482 | ␉␉␉␉␉unit = i;␊ |
483 | ␉␉␉␉}␊ |
484 | ␉␉␉␉if (*cp++ == ',') {␊ |
485 | ␉␉␉␉␉i = 0;␊ |
486 | ␉␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
487 | ␉␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
488 | ␉␉␉␉␉␉partition = i;␊ |
489 | ␉␉␉␉␉}␊ |
490 | ␉␉␉␉}␊ |
491 | ␉␉␉}␊ |
492 | ␉␉␉bvr = newBootVolumeRef(dp->biosdev + unit, partition);␊ |
493 | #if UNUSED␊ |
494 | return open_bvr(bvr, path, flags);␊ |
495 | #else␊ |
496 | return open_bvr(bvr, path);␊ |
497 | #endif␊ |
498 | ␉␉}␊ |
499 | }␊ |
500 | ␉return -1;␊ |
501 | }␊ |
502 | ␊ |
503 | //==========================================================================␊ |
504 | // close() - Close a file descriptor.␊ |
505 | ␊ |
506 | int close(int fdesc)␊ |
507 | {␊ |
508 | struct iob * io;␊ |
509 | ␊ |
510 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
511 | return (-1);␊ |
512 | ␊ |
513 | io->i_flgs = 0;␊ |
514 | ␊ |
515 | return 0;␊ |
516 | }␊ |
517 | ␊ |
518 | //==========================================================================␊ |
519 | // read() - Read up to 'count' bytes of data from the file descriptor␊ |
520 | // into the buffer pointed to by buf.␊ |
521 | ␊ |
522 | int read(int fdesc, char * buf, int count)␊ |
523 | {␊ |
524 | struct iob * io;␊ |
525 | ␊ |
526 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
527 | return (-1);␊ |
528 | ␊ |
529 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
530 | count = io->i_filesize - io->i_offset;␊ |
531 | ␊ |
532 | if (count <= 0)␊ |
533 | return 0; // end of file␊ |
534 | ␊ |
535 | bcopy(io->i_buf + io->i_offset, buf, count);␊ |
536 | ␊ |
537 | io->i_offset += count;␊ |
538 | ␊ |
539 | return count;␊ |
540 | }␊ |
541 | ␊ |
542 | //==========================================================================␊ |
543 | // file_size() - Returns the size of the file described by the file␊ |
544 | // descriptor.␊ |
545 | ␊ |
546 | int file_size(int fdesc)␊ |
547 | {␊ |
548 | struct iob * io;␊ |
549 | ␊ |
550 | if ((io = iob_from_fdesc(fdesc)) == 0)␊ |
551 | return 0;␊ |
552 | ␊ |
553 | return io->i_filesize;␊ |
554 | }␊ |
555 | ␊ |
556 | //==========================================================================␊ |
557 | ␊ |
558 | struct dirstuff * opendir(const char * path)␊ |
559 | {␊ |
560 | struct dirstuff * dirp = 0;␊ |
561 | const char * dirPath;␊ |
562 | BVRef bvr;␊ |
563 | ␊ |
564 | if ((bvr = getBootVolumeRef(path, &dirPath)) == NULL)␊ |
565 | goto error;␊ |
566 | ␊ |
567 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
568 | if (dirp == NULL)␊ |
569 | goto error;␊ |
570 | ␊ |
571 | dirp->dir_path = newString(dirPath);␊ |
572 | if (dirp->dir_path == NULL)␊ |
573 | goto error;␊ |
574 | ␊ |
575 | dirp->dir_bvr = bvr;␊ |
576 | ␊ |
577 | return dirp;␊ |
578 | ␊ |
579 | error:␊ |
580 | closedir(dirp);␊ |
581 | return NULL;␊ |
582 | }␊ |
583 | ␊ |
584 | //==========================================================================␊ |
585 | ␊ |
586 | int closedir(struct dirstuff * dirp)␊ |
587 | {␊ |
588 | if (dirp) {␊ |
589 | if (dirp->dir_path) free(dirp->dir_path);␊ |
590 | free(dirp);␊ |
591 | }␊ |
592 | return 0;␊ |
593 | }␊ |
594 | ␊ |
595 | //==========================================================================␊ |
596 | ␊ |
597 | int readdir(struct dirstuff * dirp, const char ** name, long * flags,␊ |
598 | long * time)␊ |
599 | {␊ |
600 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
601 | /* dirPath */ dirp->dir_path,␊ |
602 | /* dirIndex */ &dirp->dir_index,␊ |
603 | /* dirEntry */ (char **)name, flags, time,␊ |
604 | 0, 0);␊ |
605 | }␊ |
606 | ␊ |
607 | #if UNUSED␊ |
608 | long GetFSUUID(char *spec, char *uuidStr)␊ |
609 | {␊ |
610 | BVRef bvr;␊ |
611 | long rval = -1;␊ |
612 | const char *devSpec;␊ |
613 | ␉␊ |
614 | if ((bvr = getBootVolumeRef(spec, &devSpec)) == NULL)␊ |
615 | return -1;␊ |
616 | ␉␊ |
617 | if(bvr->fs_getuuid)␊ |
618 | rval = bvr->fs_getuuid(bvr, uuidStr);␊ |
619 | ␉␊ |
620 | return rval;␊ |
621 | }␊ |
622 | ␊ |
623 | long GetFileBlock(const char *fileSpec, unsigned long long *firstBlock)␊ |
624 | {␊ |
625 | const char * filePath;␊ |
626 | BVRef bvr;␊ |
627 | ␉␊ |
628 | // Resolve the boot volume from the file spec.␊ |
629 | ␉␊ |
630 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL) {␊ |
631 | printf("Boot volume for '%s' is bogus\n", fileSpec);␊ |
632 | return -1;␊ |
633 | }␊ |
634 | ␉␊ |
635 | return bvr->fs_getfileblock(bvr, (char *)filePath, firstBlock);␊ |
636 | }␊ |
637 | ␊ |
638 | //==========================================================================␊ |
639 | // openmem()␊ |
640 | ␊ |
641 | int openmem(char * buf, int len)␊ |
642 | {␊ |
643 | int fdesc;␊ |
644 | struct iob * io;␊ |
645 | ␉␊ |
646 | fdesc = GetFreeFd();␊ |
647 | io = &iob[fdesc];␊ |
648 | bzero(io, sizeof(*io));␊ |
649 | ␉␊ |
650 | // Mark the descriptor as taken. Set the F_MEM flag to indicate␊ |
651 | // that the file buffer is provided by the caller.␊ |
652 | ␉␊ |
653 | io->i_flgs = F_ALLOC | F_MEM;␊ |
654 | io->i_buf = buf;␊ |
655 | io->i_filesize = len;␊ |
656 | ␉␊ |
657 | return fdesc;␊ |
658 | }␊ |
659 | ␊ |
660 | //==========================================================================␊ |
661 | // lseek() - Reposition the byte offset of the file descriptor from the␊ |
662 | // beginning of the file. Returns the relocated offset.␊ |
663 | ␊ |
664 | int b_lseek(int fdesc, int offset, int ptr)␊ |
665 | {␊ |
666 | struct iob * io;␊ |
667 | ␉␊ |
668 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
669 | return (-1);␊ |
670 | ␉␊ |
671 | io->i_offset = offset;␊ |
672 | ␉␊ |
673 | return offset;␊ |
674 | }␊ |
675 | ␊ |
676 | //==========================================================================␊ |
677 | // tell() - Returns the byte offset of the file descriptor.␊ |
678 | ␊ |
679 | int tell(int fdesc)␊ |
680 | {␊ |
681 | struct iob * io;␊ |
682 | ␉␊ |
683 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
684 | return 0;␊ |
685 | ␉␊ |
686 | return io->i_offset;␊ |
687 | }␊ |
688 | ␊ |
689 | //==========================================================================␊ |
690 | // write() - Write up to 'count' bytes of data to the file descriptor␊ |
691 | // from the buffer pointed to by buf.␊ |
692 | ␊ |
693 | int write(int fdesc, const char * buf, int count)␊ |
694 | {␊ |
695 | struct iob * io;␊ |
696 | ␊ |
697 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
698 | return (-1);␊ |
699 | ␉␊ |
700 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
701 | count = io->i_filesize - io->i_offset;␊ |
702 | ␉␊ |
703 | if (count <= 0)␊ |
704 | return 0; // end of file␊ |
705 | ␉␊ |
706 | bcopy(buf, io->i_buf + io->i_offset, count);␊ |
707 | ␉␊ |
708 | io->i_offset += count;␊ |
709 | ␉␊ |
710 | return count;␊ |
711 | }␊ |
712 | ␊ |
713 | int writebyte(int fdesc, char value)␊ |
714 | {␊ |
715 | struct iob * io;␊ |
716 | ␊ |
717 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
718 | return (-1);␊ |
719 | ␉␊ |
720 | if ((io->i_offset + 1) > (unsigned int)io->i_filesize)␊ |
721 | return 0; // end of file␊ |
722 | ␉␊ |
723 | io->i_buf[io->i_offset++] = value;␊ |
724 | ␉␊ |
725 | return 1;␊ |
726 | }␊ |
727 | ␊ |
728 | int writeint(int fdesc, int value)␊ |
729 | {␊ |
730 | struct iob * io;␊ |
731 | ␊ |
732 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
733 | return (-1);␊ |
734 | ␉␊ |
735 | if ((io->i_offset + 4) > (unsigned int)io->i_filesize)␊ |
736 | return 0; // end of file␊ |
737 | ␉␊ |
738 | bcopy(&value, io->i_buf + io->i_offset, 4);␊ |
739 | ␉␊ |
740 | io->i_offset += 4;␊ |
741 | ␉␊ |
742 | return 4;␊ |
743 | }␊ |
744 | //==========================================================================␊ |
745 | ␊ |
746 | struct dirstuff * vol_opendir(BVRef bvr, const char * path)␊ |
747 | {␊ |
748 | struct dirstuff * dirp = 0;␊ |
749 | ␉␊ |
750 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
751 | if (dirp == NULL)␊ |
752 | goto error;␊ |
753 | ␉␊ |
754 | dirp->dir_path = newString(path);␊ |
755 | if (dirp->dir_path == NULL)␊ |
756 | goto error;␊ |
757 | ␉␊ |
758 | dirp->dir_bvr = bvr;␊ |
759 | ␉␊ |
760 | return dirp;␊ |
761 | ␉␊ |
762 | error:␊ |
763 | closedir(dirp);␊ |
764 | return NULL;␊ |
765 | }␊ |
766 | ␊ |
767 | //==========================================================================␊ |
768 | ␊ |
769 | int readdir_ext(struct dirstuff * dirp, const char ** name, long * flags,␊ |
770 | long * time, FinderInfo *finderInfo, long *infoValid)␊ |
771 | {␊ |
772 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
773 | /* dirPath */ dirp->dir_path,␊ |
774 | /* dirIndex */ &dirp->dir_index,␊ |
775 | /* dirEntry */ (char **)name,␊ |
776 | flags, time,␊ |
777 | finderInfo, infoValid);␊ |
778 | }␊ |
779 | //==========================================================================␊ |
780 | ␊ |
781 | const char * systemConfigDir()␊ |
782 | {␊ |
783 | if (gBootFileType == kNetworkDeviceType)␊ |
784 | ␉return "";␊ |
785 | return "/Library/Preferences/SystemConfiguration";␊ |
786 | }␊ |
787 | ␊ |
788 | #endif␊ |
789 | ␊ |
790 | //==========================================================================␊ |
791 | ␊ |
792 | int gBootFileType;␊ |
793 | ␊ |
794 | void scanBootVolumes( int biosdev, int * count )␊ |
795 | {␊ |
796 | BVRef bvr = 0;␊ |
797 | ␊ |
798 | bvr = diskScanBootVolumes(biosdev, count);␊ |
799 | if (bvr == NULL)␊ |
800 | {␊ |
801 | #ifdef NBP_SUPPORT␊ |
802 | bvr = nbpScanBootVolumes(biosdev, count);␊ |
803 | if (bvr != NULL)␊ |
804 | {␊ |
805 | gBootFileType = kNetworkDeviceType;␊ |
806 | }␊ |
807 | #endif␊ |
808 | }␊ |
809 | else␊ |
810 | {␊ |
811 | gBootFileType = kBlockDeviceType;␊ |
812 | }␊ |
813 | }␊ |
814 | ␊ |
815 | //==========================================================================␊ |
816 | #if UNUSED␊ |
817 | void scanDisks(int biosdev, int *count)␊ |
818 | #else␊ |
819 | void scanDisks(void)␊ |
820 | #endif␊ |
821 | {␊ |
822 | #define MAX_HDD_COUNT 32␊ |
823 | int bvCount;␊ |
824 | int hd = 0;␊ |
825 | ␊ |
826 | // Testing up to MAX_HDD_COUNT hard drives.␊ |
827 | ␉while(!testBiosread(0x80 + hd, 0) && hd < MAX_HDD_COUNT)␊ |
828 | ␉{␊ |
829 | ␉ bvCount = 0;␊ |
830 | ␉ scanBootVolumes(0x80 + hd, &bvCount);␊ |
831 | hd++;␊ |
832 | ␉}␊ |
833 | ␊ |
834 | // Also scanning CD/DVD drive.␊ |
835 | ␉if (biosDevIsCDROM(gBIOSDev))␊ |
836 | ␉{␊ |
837 | ␉ bvCount = 0;␊ |
838 | ␉scanBootVolumes(gBIOSDev, &bvCount);␊ |
839 | ␉}␊ |
840 | }␊ |
841 | ␊ |
842 | //==========================================================================␊ |
843 | ␊ |
844 | BVRef selectBootVolume( BVRef chain )␊ |
845 | {␊ |
846 | ␉bool filteredChain = false;␊ |
847 | ␉bool foundPrimary = false;␊ |
848 | ␉BVRef bvr, bvr1 = 0, bvr2 = 0;␊ |
849 | ␉␊ |
850 | ␉if (chain->filtered) filteredChain = true;␊ |
851 | ␉␊ |
852 | #if UNUSED␊ |
853 | ␉if (multiboot_partition_set)␊ |
854 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
855 | ␉␉␉if ( bvr->part_no == multiboot_partition && bvr->biosdev == gBIOSDev ) ␊ |
856 | ␉␉␉␉return bvr;␊ |
857 | #endif␊ |
858 | ␉/*␊ |
859 | ␉ * Checking "Default Partition" key in system configuration - use format: hd(x,y), the volume UUID or label -␊ |
860 | ␉ * to override the default selection.␊ |
861 | ␉ * We accept only kBVFlagSystemVolume or kBVFlagForeignBoot volumes.␊ |
862 | ␉ */␊ |
863 | ␉char *val = XMLDecode(getStringForKey(kDefaultPartition, &bootInfo->bootConfig));␊ |
864 | if (val) {␊ |
865 | for ( bvr = chain; bvr; bvr = bvr->next ) {␊ |
866 | if (matchVolumeToString(bvr, val, false)) {␊ |
867 | free(val);␊ |
868 | return bvr;␊ |
869 | }␊ |
870 | }␊ |
871 | free(val);␊ |
872 | }␉␊ |
873 | ␉␊ |
874 | ␉/*␊ |
875 | ␉ * Scannig the volume chain backwards and trying to find ␊ |
876 | ␉ * a HFS+ volume with valid boot record signature.␊ |
877 | ␉ * If not found any active partition then we will␊ |
878 | ␉ * select this volume as the boot volume.␊ |
879 | ␉ */␊ |
880 | ␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
881 | ␉{␊ |
882 | ␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) foundPrimary = true;␊ |
883 | ␉␉// zhell -- Undo a regression that was introduced from r491 to 492.␊ |
884 | ␉␉// if gBIOSBootVolume is set already, no change is required␊ |
885 | ␉␉if ( bvr->flags & (kBVFlagBootable|kBVFlagSystemVolume)␊ |
886 | ␉␉␉&& gBIOSBootVolume␊ |
887 | ␉␉␉&& (!filteredChain || (filteredChain && bvr->visible))␊ |
888 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
889 | ␉␉␉bvr2 = bvr;␊ |
890 | ␉␉// zhell -- if gBIOSBootVolume is NOT set, we use the "if" statement␊ |
891 | ␉␉// from r491,␊ |
892 | ␉␉if ( bvr->flags & kBVFlagBootable␊ |
893 | ␉␉␉&& ! gBIOSBootVolume␊ |
894 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
895 | ␉␉␉bvr2 = bvr;␊ |
896 | ␉} ␊ |
897 | ␉␊ |
898 | ␉␊ |
899 | ␉/*␊ |
900 | ␉ * Use the standrad method for selecting the boot volume.␊ |
901 | ␉ */␊ |
902 | ␉if (foundPrimary)␊ |
903 | ␉{␊ |
904 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
905 | ␉␉{␊ |
906 | ␉␉␉if ( bvr->flags & kBVFlagNativeBoot && bvr->biosdev == gBIOSDev ) bvr1 = bvr;␊ |
907 | ␉␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) bvr2 = bvr;␊ |
908 | ␉␉}␊ |
909 | ␉}␊ |
910 | ␉␊ |
911 | ␉bvr = bvr2 ? bvr2 :␊ |
912 | ␉bvr1 ? bvr1 : chain;␊ |
913 | ␉␊ |
914 | ␉return bvr;␊ |
915 | }␊ |
916 | ␊ |
917 | //==========================================================================␊ |
918 | ␊ |
919 | #define LP '('␊ |
920 | #define RP ')'␊ |
921 | int gBIOSDev;␊ |
922 | ␊ |
923 | /*!␊ |
924 | This is like boot2's gBootVolume except it is for the internal use of␊ |
925 | libsaio to track which volume an unqualified path should be relative to.␊ |
926 | This replaces bootInfo->kernDev as the carrier of this information.␊ |
927 | */␊ |
928 | static BVRef gRootVolume;␊ |
929 | ␊ |
930 | void setRootVolume(BVRef volume)␊ |
931 | {␊ |
932 | gRootVolume = volume;␊ |
933 | // Veto non-native FS. Basically that means don't allow the root volume to␊ |
934 | // be set to a volume we can't read files from.␊ |
935 | if(gRootVolume != NULL && ((gRootVolume->flags & kBVFlagNativeBoot) == 0))␊ |
936 | gRootVolume = NULL;␊ |
937 | }␊ |
938 | ␊ |
939 | void setBootGlobals(BVRef chain)␊ |
940 | {␊ |
941 | // Record default boot device.␊ |
942 | gBootVolume = selectBootVolume(chain);␊ |
943 | ␊ |
944 | // turbo - Save the ORIGINAL boot volume too for loading our mkext␊ |
945 | if (!gBIOSBootVolume) gBIOSBootVolume = gBootVolume;␊ |
946 | ␊ |
947 | setRootVolume(gBootVolume);␉␊ |
948 | }␊ |
949 | ␊ |
950 | /*!␊ |
951 | Extracts the volume selector from the pathname, returns the selected␊ |
952 | BVRef, and sets *outPath to the remainder of the path.␊ |
953 | If the path did not include a volume selector then the current volume␊ |
954 | is used. When called with a volume selector the current volume␊ |
955 | is changed to the selected volume unless the volume selector is␊ |
956 | that of a ramdisk.␊ |
957 | */␊ |
958 | BVRef getBootVolumeRef( const char * path, const char ** outPath )␊ |
959 | {␊ |
960 | const char * cp;␊ |
961 | BVRef bvr = gRootVolume;␊ |
962 | int biosdev = gBIOSDev;␊ |
963 | ␊ |
964 | // Search for left parenthesis in the path specification.␊ |
965 | ␊ |
966 | for (cp = path; *cp; cp++) {␊ |
967 | if (*cp == LP || *cp == '/') break;␊ |
968 | }␊ |
969 | ␊ |
970 | if (*cp != LP) // no left paren found␊ |
971 | {␊ |
972 | // Path is using the implicit current device so if there is␊ |
973 | // no current device, then we must fail.␊ |
974 | cp = path;␊ |
975 | if ( gRootVolume == NULL )␊ |
976 | return NULL;␊ |
977 | }␊ |
978 | else if ((cp - path) == 2) // found "xx("␊ |
979 | {␊ |
980 | const struct devsw * dp;␊ |
981 | const char * xp = path;␊ |
982 | int i;␊ |
983 | int unit = -1;␊ |
984 | int part = -1;␊ |
985 | ␊ |
986 | cp++;␊ |
987 | ␊ |
988 | // Check the 2 character device name pointed by 'xp'.␊ |
989 | ␊ |
990 | for (dp = devsw; dp->name; dp++)␊ |
991 | {␊ |
992 | if ((xp[0] == dp->name[0]) && (xp[1] == dp->name[1]))␊ |
993 | break; // found matching entry␊ |
994 | }␊ |
995 | if (dp->name == NULL)␊ |
996 | {␊ |
997 | error("Unknown device '%c%c'\n", xp[0], xp[1]);␊ |
998 | return NULL;␊ |
999 | }␊ |
1000 | ␊ |
1001 | // Extract the optional unit number from the specification.␊ |
1002 | // hd(unit) or hd(unit, part).␊ |
1003 | ␊ |
1004 | i = 0;␊ |
1005 | while (*cp >= '0' && *cp <= '9')␊ |
1006 | {␊ |
1007 | i = i * 10 + *cp++ - '0';␊ |
1008 | unit = i;␊ |
1009 | }␊ |
1010 | ␊ |
1011 | // Unit is no longer optional and never really was.␊ |
1012 | // If the user failed to specify it then the unit number from the previous kernDev␊ |
1013 | // would have been used which makes little sense anyway.␊ |
1014 | // For example, if the user did fd()/foobar and the current root device was the␊ |
1015 | // second hard disk (i.e. unit 1) then fd() would select the second floppy drive!␊ |
1016 | if(unit == -1)␊ |
1017 | return NULL;␊ |
1018 | ␊ |
1019 | // Extract the optional partition number from the specification.␊ |
1020 | ␊ |
1021 | if (*cp == ',')␊ |
1022 | part = atoi(++cp);␊ |
1023 | ␊ |
1024 | // If part is not specified part will be -1 whereas before it would have been␊ |
1025 | // whatever the last partition was which makes about zero sense if the device␊ |
1026 | // has been switched.␊ |
1027 | ␊ |
1028 | // Skip past the right paren.␊ |
1029 | ␊ |
1030 | for ( ; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1031 | if (*cp == RP) cp++;␊ |
1032 | ␊ |
1033 | biosdev = dp->biosdev + unit;␊ |
1034 | bvr = newBootVolumeRef(biosdev, part);␊ |
1035 | ␊ |
1036 | if(bvr == NULL)␊ |
1037 | return NULL;␊ |
1038 | }␊ |
1039 | else␊ |
1040 | {␊ |
1041 | // Bad device specifier, skip past the right paren.␊ |
1042 | ␊ |
1043 | for ( cp++; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1044 | if (*cp == RP) cp++;␊ |
1045 | // If gRootVolume was NULL, then bvr will be NULL as well which␊ |
1046 | // should be caught by the caller.␊ |
1047 | }␊ |
1048 | ␊ |
1049 | // Returns the file path following the device spec.␊ |
1050 | // e.g. 'hd(1,b)mach_kernel' is reduced to 'mach_kernel'.␊ |
1051 | ␊ |
1052 | *outPath = cp;␊ |
1053 | ␊ |
1054 | return bvr;␊ |
1055 | }␊ |
1056 | ␊ |
1057 | //==========================================================================␊ |
1058 | // Function name is a misnomer as scanBootVolumes usually calls diskScanBootVolumes␊ |
1059 | // which caches the information. So it's only allocated on the first run.␊ |
1060 | static BVRef newBootVolumeRef( int biosdev, int partno )␊ |
1061 | {␊ |
1062 | ␉BVRef bvr, bvr1, bvrChain;␊ |
1063 | ␊ |
1064 | ␉bvr = bvr1 = NULL;␊ |
1065 | ␊ |
1066 | // Try resolving "rd" and "bt" devices first.␊ |
1067 | ␉execute_hook("newRamDisk_BVR", &biosdev, &bvr1, NULL, NULL, NULL, NULL);␊ |
1068 | ␉␊ |
1069 | // Try resolving "rd" and "bt" devices first.␊ |
1070 | ␉␊ |
1071 | ␉if (biosdev == kPseudoBIOSDevBooter)␊ |
1072 | ␉{␊ |
1073 | ␉␉if (bvr1 == NULL )␊ |
1074 | ␉␉␉bvr1 = gBIOSBootVolume;␊ |
1075 | ␉}␊ |
1076 | ␉else␊ |
1077 | ␉{␊ |
1078 | ␉␉// Fetch the volume list from the device.␊ |
1079 | ␊ |
1080 | ␉␉scanBootVolumes( biosdev, NULL );␊ |
1081 | ␉␉bvrChain = getBVChainForBIOSDev(biosdev);␊ |
1082 | ␊ |
1083 | ␉␉// Look for a perfect match based on device and partition number.␊ |
1084 | ␊ |
1085 | ␉␉for ( bvr1 = NULL, bvr = bvrChain; bvr; bvr = bvr->next )␊ |
1086 | ␉␉{␊ |
1087 | ␉␉␉if ( ( bvr->flags & kBVFlagNativeBoot ) == 0 ) continue;␊ |
1088 | ␊ |
1089 | ␉␉␉bvr1 = bvr;␊ |
1090 | ␉␉␉if ( bvr->part_no == partno ) break;␊ |
1091 | ␉␉}␊ |
1092 | ␉}␊ |
1093 | ␊ |
1094 | ␉return bvr ? bvr : bvr1;␊ |
1095 | }␊ |
1096 | ␊ |
1097 | //==========================================================================␊ |
1098 | // getDeviceDescription() - Extracts unit number and partition number␊ |
1099 | // from bvr structure into "dw(u,p)" format.␊ |
1100 | // Returns length of the out string␊ |
1101 | int getDeviceDescription(BVRef bvr, char *str)␊ |
1102 | {␊ |
1103 | if(!str)␊ |
1104 | return 0;␊ |
1105 | ␊ |
1106 | ␉*str = '\0';␊ |
1107 | ␊ |
1108 | ␉if (bvr)␊ |
1109 | ␉{␊ |
1110 | const struct devsw *dp = devsw;␊ |
1111 | ␉␉while(dp->name && bvr->biosdev >= dp->biosdev)␊ |
1112 | dp++;␊ |
1113 | ␊ |
1114 | ␉␉dp--;␊ |
1115 | ␉␉if (dp->name)␊ |
1116 | return sprintf(str, "%s(%d,%d)", dp->name, bvr->biosdev - dp->biosdev, bvr->part_no);␊ |
1117 | ␉}␊ |
1118 | ␉␊ |
1119 | ␉return 0;␊ |
1120 | }␊ |
1121 | |