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 | //␉{ "fd", 0x00, kBIOSDevTypeFloppy }, /* DEV_FD */Azi:reminder␊ |
94 | //␉{ "sd", 0x80, kBIOSDevTypeHardDrive }, /* DEV_SD */␉␉||␊ |
95 | { "hd", 0x80, kBIOSDevTypeHardDrive }, /* DEV_HD */␊ |
96 | { "en", 0xE0, kBIOSDevTypeNetwork }, /* DEV_EN */␊ |
97 | { "rd", 0x100, kBIOSDevTypeHardDrive },␊ |
98 | { "bt", 0x101, kBIOSDevTypeHardDrive }, // turbo - type for booter partition Azi: or ramdisk bt aliased??␊ |
99 | { 0, 0 }␊ |
100 | };␊ |
101 | ␊ |
102 | // Pseudo BIOS devices␊ |
103 | enum {␊ |
104 | ␉kPseudoBIOSDevRAMDisk = 0x100,␊ |
105 | ␉kPseudoBIOSDevBooter = 0x101␊ |
106 | };␊ |
107 | ␊ |
108 | /*␊ |
109 | * Max number of file descriptors.␊ |
110 | */␊ |
111 | #define NFILES 6␊ |
112 | ␊ |
113 | static struct iob iob[NFILES];␊ |
114 | ␊ |
115 | void * gFSLoadAddress = 0;␊ |
116 | ␊ |
117 | // Turbo - save what we think is our original BIOS boot volume if we have one 0xab␊ |
118 | BVRef gBIOSBootVolume = NULL;␊ |
119 | BVRef gBootVolume;␊ |
120 | ␊ |
121 | //static BVRef getBootVolumeRef( const char * path, const char ** outPath );␊ |
122 | static BVRef newBootVolumeRef( int biosdev, int partno );␊ |
123 | ␊ |
124 | //==========================================================================␊ |
125 | // LoadVolumeFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
126 | // Load the specified file from the specified volume␊ |
127 | // to the load buffer at LOAD_ADDR.␊ |
128 | // If the file is fat, load only the i386 portion.␊ |
129 | ␊ |
130 | long LoadVolumeFile(BVRef bvr, const char *filePath)␊ |
131 | {␊ |
132 | long fileSize;␊ |
133 | ␊ |
134 | // Read file into load buffer. The data in the load buffer will be␊ |
135 | // overwritten by the next LoadFile() call.␊ |
136 | ␊ |
137 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
138 | ␊ |
139 | fileSize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
140 | ␊ |
141 | // Return the size of the file, or -1 if load failed.␊ |
142 | ␊ |
143 | return fileSize;␊ |
144 | }␊ |
145 | ␊ |
146 | //==========================================================================␊ |
147 | // LoadFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
148 | // Load the specified file to the load buffer at LOAD_ADDR.␊ |
149 | // If the file is fat, load only the i386 portion.␊ |
150 | ␊ |
151 | long LoadFile(const char * fileSpec)␊ |
152 | {␊ |
153 | const char * filePath;␊ |
154 | BVRef bvr;␊ |
155 | ␊ |
156 | // Resolve the boot volume from the file spec.␊ |
157 | ␊ |
158 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
159 | return -1;␊ |
160 | ␊ |
161 | return LoadVolumeFile(bvr, filePath);␊ |
162 | }␊ |
163 | ␊ |
164 | long ReadFileAtOffset(const char * fileSpec, void *buffer, uint64_t offset, uint64_t length)␊ |
165 | {␊ |
166 | const char *filePath;␊ |
167 | BVRef bvr;␊ |
168 | ␊ |
169 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
170 | return -1;␊ |
171 | ␊ |
172 | if (bvr->fs_readfile == NULL)␊ |
173 | return -1;␊ |
174 | ␊ |
175 | return bvr->fs_readfile(bvr, (char *)filePath, buffer, offset, length);␊ |
176 | }␊ |
177 | ␊ |
178 | long LoadThinFatFile(const char *fileSpec, void **binary)␊ |
179 | {␊ |
180 | const char *filePath;␊ |
181 | FSReadFile readFile;␊ |
182 | BVRef bvr;␊ |
183 | unsigned long length, length2;␊ |
184 | ␊ |
185 | // Resolve the boot volume from the file spec.␊ |
186 | ␊ |
187 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
188 | return -1;␊ |
189 | ␊ |
190 | *binary = (void *)kLoadAddr;␊ |
191 | ␊ |
192 | // Read file into load buffer. The data in the load buffer will be␊ |
193 | // overwritten by the next LoadFile() call.␊ |
194 | ␊ |
195 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
196 | ␊ |
197 | readFile = bvr->fs_readfile;␊ |
198 | ␊ |
199 | if (readFile != NULL) {␊ |
200 | // Read the first 4096 bytes (fat header)␊ |
201 | length = readFile(bvr, (char *)filePath, *binary, 0, 0x1000);␊ |
202 | if (length > 0) {␊ |
203 | if (ThinFatFile(binary, &length) == 0) {␊ |
204 | ␉␉␉␉if (length == 0)␊ |
205 | ␉␉␉␉␉return 0;␊ |
206 | // We found a fat binary; read only the thin part␊ |
207 | length = readFile(bvr, (char *)filePath,␊ |
208 | (void *)kLoadAddr, (unsigned long)(*binary) - kLoadAddr, length);␊ |
209 | *binary = (void *)kLoadAddr;␊ |
210 | } else {␊ |
211 | // Not a fat binary; read the rest of the file␊ |
212 | length2 = readFile(bvr, (char *)filePath, (void *)(kLoadAddr + length), length, 0);␊ |
213 | if (length2 == -1) return -1;␊ |
214 | length += length2;␊ |
215 | }␊ |
216 | }␊ |
217 | } else {␊ |
218 | length = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
219 | if (length > 0) {␊ |
220 | ThinFatFile(binary, &length);␊ |
221 | }␊ |
222 | }␊ |
223 | ␊ |
224 | return length;␊ |
225 | }␊ |
226 | ␊ |
227 | #if UNUSED␊ |
228 | long GetFSUUID(char *spec, char *uuidStr)␊ |
229 | {␊ |
230 | BVRef bvr;␊ |
231 | long rval = -1;␊ |
232 | const char *devSpec;␊ |
233 | ␊ |
234 | if ((bvr = getBootVolumeRef(spec, &devSpec)) == NULL)␊ |
235 | return -1;␊ |
236 | ␊ |
237 | if(bvr->fs_getuuid)␊ |
238 | rval = bvr->fs_getuuid(bvr, uuidStr);␊ |
239 | ␊ |
240 | return rval;␊ |
241 | }␊ |
242 | #endif␊ |
243 | ␊ |
244 | // filesystem-specific getUUID functions call this shared string generator␊ |
245 | long CreateUUIDString(uint8_t uubytes[], int nbytes, char *uuidStr)␊ |
246 | {␊ |
247 | unsigned fmtbase, fmtidx, i;␊ |
248 | uint8_t uuidfmt[] = { 4, 2, 2, 2, 6 };␊ |
249 | char *p = uuidStr;␊ |
250 | MD5_CTX md5c;␊ |
251 | uint8_t mdresult[16];␊ |
252 | ␊ |
253 | bzero(mdresult, sizeof(mdresult));␊ |
254 | ␊ |
255 | // just like AppleFileSystemDriver␊ |
256 | MD5Init(&md5c);␊ |
257 | MD5Update(&md5c, kFSUUIDNamespaceSHA1, sizeof(kFSUUIDNamespaceSHA1));␊ |
258 | MD5Update(&md5c, uubytes, nbytes);␊ |
259 | MD5Final(mdresult, &md5c);␊ |
260 | ␊ |
261 | // this UUID has been made version 3 style (i.e. via namespace)␊ |
262 | // see "-uuid-urn-" IETF draft (which otherwise copies byte for byte)␊ |
263 | mdresult[6] = 0x30 | ( mdresult[6] & 0x0F );␊ |
264 | mdresult[8] = 0x80 | ( mdresult[8] & 0x3F );␊ |
265 | ␊ |
266 | ␊ |
267 | // generate the text: e.g. 5EB1869F-C4FA-3502-BDEB-3B8ED5D87292␊ |
268 | i = 0; fmtbase = 0;␊ |
269 | for(fmtidx = 0; fmtidx < sizeof(uuidfmt); fmtidx++) {␊ |
270 | for(i=0; i < uuidfmt[fmtidx]; i++) {␊ |
271 | uint8_t byte = mdresult[fmtbase+i];␊ |
272 | char nib;␊ |
273 | ␊ |
274 | nib = byte >> 4;␊ |
275 | *p = nib + '0'; // 0x4 -> '4'␊ |
276 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
277 | p++;␊ |
278 | ␊ |
279 | nib = byte & 0xf;␊ |
280 | *p = nib + '0'; // 0x4 -> '4'␊ |
281 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
282 | p++;␊ |
283 | ␊ |
284 | }␊ |
285 | fmtbase += i;␊ |
286 | if(fmtidx < sizeof(uuidfmt)-1)␊ |
287 | *(p++) = '-';␊ |
288 | else␊ |
289 | *p = '\0';␊ |
290 | }␊ |
291 | ␊ |
292 | return 0;␊ |
293 | }␊ |
294 | ␊ |
295 | ␊ |
296 | //==========================================================================␊ |
297 | // GetDirEntry - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
298 | // Fetch the next directory entry for the given directory.␊ |
299 | ␊ |
300 | long GetDirEntry(const char * dirSpec, long long * dirIndex, const char ** name, ␊ |
301 | long * flags, long * time)␊ |
302 | {␊ |
303 | const char * dirPath;␊ |
304 | BVRef bvr;␊ |
305 | ␊ |
306 | // Resolve the boot volume from the dir spec.␊ |
307 | ␊ |
308 | if ((bvr = getBootVolumeRef(dirSpec, &dirPath)) == NULL)␊ |
309 | return -1;␊ |
310 | ␊ |
311 | // Return 0 on success, or -1 if there are no additional entries.␊ |
312 | ␊ |
313 | return bvr->fs_getdirentry( bvr,␊ |
314 | /* dirPath */ (char *)dirPath,␊ |
315 | /* dirIndex */ dirIndex,␊ |
316 | /* dirEntry */ (char **)name, flags, time, 0, 0 );␊ |
317 | }␊ |
318 | ␊ |
319 | //==========================================================================␊ |
320 | // GetFileInfo - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
321 | // Get attributes for the specified file.␊ |
322 | ␊ |
323 | static char* gMakeDirSpec;␊ |
324 | ␊ |
325 | long GetFileInfo(const char * dirSpec, const char * name,␊ |
326 | long * flags, long * time)␊ |
327 | {␊ |
328 | long long index = 0;␊ |
329 | const char * entryName;␊ |
330 | ␊ |
331 | if (gMakeDirSpec == 0)␊ |
332 | gMakeDirSpec = (char *)malloc(1024);␊ |
333 | ␊ |
334 | if (!dirSpec) {␊ |
335 | long idx, len;␊ |
336 | ␊ |
337 | len = strlen(name);␊ |
338 | ␊ |
339 | for (idx = len; idx && (name[idx] != '/' && name[idx] != '\\'); idx--) {}␊ |
340 | if (idx == 0) {␊ |
341 | gMakeDirSpec[0] = '/';␊ |
342 | gMakeDirSpec[1] = '\0';␊ |
343 | } else {␊ |
344 | idx++;␊ |
345 | strncpy(gMakeDirSpec, name, idx);␊ |
346 | name += idx;␊ |
347 | }␊ |
348 | dirSpec = gMakeDirSpec;␊ |
349 | }␊ |
350 | ␊ |
351 | while (GetDirEntry(dirSpec, &index, &entryName, flags, time) == 0)␊ |
352 | {␊ |
353 | if (strcmp(entryName, name) == 0)␊ |
354 | return 0; // success␊ |
355 | }␊ |
356 | return -1; // file not found␊ |
357 | }␊ |
358 | ␊ |
359 | long GetFileBlock(const char *fileSpec, unsigned long long *firstBlock)␊ |
360 | {␊ |
361 | const char * filePath;␊ |
362 | BVRef bvr;␊ |
363 | ␊ |
364 | // Resolve the boot volume from the file spec.␊ |
365 | ␊ |
366 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL) {␊ |
367 | printf("Boot volume for '%s' is bogus\n", fileSpec);␊ |
368 | return -1;␊ |
369 | }␊ |
370 | ␊ |
371 | return bvr->fs_getfileblock(bvr, (char *)filePath, firstBlock);␊ |
372 | }␊ |
373 | ␊ |
374 | //==========================================================================␊ |
375 | // GetFreeFD()␊ |
376 | ␊ |
377 | static int GetFreeFd(void)␊ |
378 | {␊ |
379 | ␉int␉fd;␊ |
380 | ␊ |
381 | ␉// Locate a free descriptor slot.␊ |
382 | ␉for (fd = 0; fd < NFILES; fd++) {␊ |
383 | ␉␉if (iob[fd].i_flgs == 0) {␊ |
384 | ␉␉␉return fd;␊ |
385 | ␉ ␉}␊ |
386 | ␉}␊ |
387 | ␉stop("Out of file descriptors");␊ |
388 | ␉// not reached␊ |
389 | ␉return -1;␊ |
390 | }␊ |
391 | ␊ |
392 | //==========================================================================␊ |
393 | // iob_from_fdesc()␊ |
394 | //␊ |
395 | // Return a pointer to an allocated 'iob' based on the file descriptor␊ |
396 | // provided. Returns NULL if the file descriptor given is invalid.␊ |
397 | ␊ |
398 | static struct iob * iob_from_fdesc(int fdesc)␊ |
399 | {␊ |
400 | register struct iob * io;␊ |
401 | ␊ |
402 | if (fdesc < 0 || fdesc >= NFILES ||␊ |
403 | ((io = &iob[fdesc])->i_flgs & F_ALLOC) == 0)␊ |
404 | return NULL;␊ |
405 | else␊ |
406 | return io;␊ |
407 | }␊ |
408 | ␊ |
409 | //==========================================================================␊ |
410 | // openmem()␊ |
411 | ␊ |
412 | int openmem(char * buf, int len)␊ |
413 | {␊ |
414 | int fdesc;␊ |
415 | struct iob * io;␊ |
416 | ␊ |
417 | fdesc = GetFreeFd();␊ |
418 | io = &iob[fdesc];␊ |
419 | bzero(io, sizeof(*io));␊ |
420 | ␊ |
421 | // Mark the descriptor as taken. Set the F_MEM flag to indicate␊ |
422 | // that the file buffer is provided by the caller.␊ |
423 | ␊ |
424 | io->i_flgs = F_ALLOC | F_MEM;␊ |
425 | io->i_buf = buf;␊ |
426 | io->i_filesize = len;␊ |
427 | ␊ |
428 | return fdesc;␊ |
429 | }␊ |
430 | ␊ |
431 | //==========================================================================␊ |
432 | // open() - Open the file specified by 'path' for reading.␊ |
433 | ␊ |
434 | static int open_bvr(BVRef bvr, const char *filePath, int flags)␊ |
435 | {␊ |
436 | ␉struct iob␉*io;␊ |
437 | ␉int␉␉fdesc;␊ |
438 | ␉int␉␉i;␊ |
439 | ␊ |
440 | ␉if (bvr == NULL) {␊ |
441 | ␉␉return -1;␊ |
442 | ␉}␊ |
443 | ␊ |
444 | ␉fdesc = GetFreeFd();␊ |
445 | ␉io = &iob[fdesc];␊ |
446 | ␉bzero(io, sizeof(*io));␊ |
447 | ␊ |
448 | ␉// Mark the descriptor as taken.␊ |
449 | ␉io->i_flgs = F_ALLOC;␊ |
450 | ␊ |
451 | ␉// Find the next available memory block in the download buffer.␊ |
452 | ␉io->i_buf = (char *) LOAD_ADDR;␊ |
453 | ␉for (i = 0; i < NFILES; i++) {␊ |
454 | ␉␉if ((iob[i].i_flgs != F_ALLOC) || (i == fdesc)) {␊ |
455 | ␉␉␉continue;␊ |
456 | ␉␉}␊ |
457 | ␉␉io->i_buf = max(iob[i].i_filesize + iob[i].i_buf, io->i_buf);␊ |
458 | ␉}␊ |
459 | ␊ |
460 | ␉// Load entire file into memory. Unnecessary open() calls must be avoided. Azi:---␊ |
461 | ␉gFSLoadAddress = io->i_buf;␊ |
462 | ␉io->i_filesize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
463 | ␉if (io->i_filesize < 0) {␊ |
464 | ␉␉close(fdesc);␊ |
465 | ␉␉return -1;␊ |
466 | ␉}␊ |
467 | ␉return fdesc;␊ |
468 | }␊ |
469 | ␊ |
470 | int open(const char *path, int flags)␊ |
471 | {␊ |
472 | ␉const char␉*filepath;␊ |
473 | ␉BVRef␉␉bvr;␊ |
474 | ␊ |
475 | ␉// Resolve the boot volume from the file spec.␊ |
476 | ␉if ((bvr = getBootVolumeRef(path, &filepath)) != NULL) {␊ |
477 | ␉␉return open_bvr(bvr, filepath, flags);␊ |
478 | ␉}␊ |
479 | ␉return -1;␊ |
480 | }␊ |
481 | ␊ |
482 | int open_bvdev(const char *bvd, const char *path, int flags)␊ |
483 | {␊ |
484 | const struct devsw␉*dp;␊ |
485 | ␉const char␉␉*cp;␊ |
486 | ␉BVRef␉␉␉bvr;␊ |
487 | ␉int␉␉␉i;␊ |
488 | ␉int␉␉␉len;␊ |
489 | ␉int␉␉␉unit;␊ |
490 | ␉int␉␉␉partition;␊ |
491 | ␊ |
492 | ␉//Azi: Ok, "path" is checked first so, i've been saying some bs :P␊ |
493 | ␉if ((i = open(path, flags)) >= 0) {␊ |
494 | ␉␉return i;␊ |
495 | ␉}␊ |
496 | ␊ |
497 | ␉if (bvd == NULL || (len = strlen(bvd)) < 2) {␊ |
498 | ␉␉return -1;␊ |
499 | ␉}␊ |
500 | ␊ |
501 | ␉for (dp=devsw; dp->name; dp++) {␊ |
502 | ␉␉if (bvd[0] == dp->name[0] && bvd[1] == dp->name[1]) {␊ |
503 | ␉␉␉unit = 0;␊ |
504 | ␉␉␉partition = 0;␊ |
505 | ␉␉␉/* get optional unit and partition */␊ |
506 | ␉␉␉if (len >= 5 && bvd[2] == '(') { /* min must be present xx(0) */␊ |
507 | ␉␉␉␉cp = &bvd[3];␊ |
508 | ␉␉␉␉i = 0;␊ |
509 | ␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
510 | ␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
511 | ␉␉␉␉␉unit = i;␊ |
512 | ␉␉␉␉}␊ |
513 | ␉␉␉␉if (*cp++ == ',') {␊ |
514 | ␉␉␉␉␉i = 0;␊ |
515 | ␉␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
516 | ␉␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
517 | ␉␉␉␉␉␉partition = i;␊ |
518 | ␉␉␉␉␉}␊ |
519 | ␉␉␉␉}␊ |
520 | ␉␉␉}␊ |
521 | ␉␉␉bvr = newBootVolumeRef(dp->biosdev + unit, partition);␊ |
522 | ␉␉␉return open_bvr(bvr, path, flags);␊ |
523 | ␉␉}␊ |
524 | }␊ |
525 | ␉return -1;␊ |
526 | }␊ |
527 | ␊ |
528 | //==========================================================================␊ |
529 | // close() - Close a file descriptor.␊ |
530 | ␊ |
531 | int close(int fdesc)␊ |
532 | {␊ |
533 | struct iob * io;␊ |
534 | ␊ |
535 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
536 | return (-1);␊ |
537 | ␊ |
538 | io->i_flgs = 0;␊ |
539 | ␊ |
540 | return 0;␊ |
541 | }␊ |
542 | ␊ |
543 | //==========================================================================␊ |
544 | // lseek() - Reposition the byte offset of the file descriptor from the␊ |
545 | // beginning of the file. Returns the relocated offset.␊ |
546 | ␊ |
547 | int b_lseek(int fdesc, int offset, int ptr)␊ |
548 | {␊ |
549 | struct iob * io;␊ |
550 | ␊ |
551 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
552 | return (-1);␊ |
553 | ␊ |
554 | io->i_offset = offset;␊ |
555 | ␊ |
556 | return offset;␊ |
557 | }␊ |
558 | ␊ |
559 | //==========================================================================␊ |
560 | // tell() - Returns the byte offset of the file descriptor.␊ |
561 | ␊ |
562 | int tell(int fdesc)␊ |
563 | {␊ |
564 | struct iob * io;␊ |
565 | ␊ |
566 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
567 | return 0;␊ |
568 | ␊ |
569 | return io->i_offset;␊ |
570 | }␊ |
571 | ␊ |
572 | //==========================================================================␊ |
573 | // read() - Read up to 'count' bytes of data from the file descriptor␊ |
574 | // into the buffer pointed to by buf.␊ |
575 | ␊ |
576 | int read(int fdesc, char * buf, int count)␊ |
577 | {␊ |
578 | struct iob * io;␊ |
579 | ␊ |
580 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
581 | return (-1);␊ |
582 | ␊ |
583 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
584 | count = io->i_filesize - io->i_offset;␊ |
585 | ␊ |
586 | if (count <= 0)␊ |
587 | return 0; // end of file␊ |
588 | ␊ |
589 | bcopy(io->i_buf + io->i_offset, buf, count);␊ |
590 | ␊ |
591 | io->i_offset += count;␊ |
592 | ␊ |
593 | return count;␊ |
594 | }␊ |
595 | ␊ |
596 | //==========================================================================␊ |
597 | // write() - Write up to 'count' bytes of data to the file descriptor␊ |
598 | // from the buffer pointed to by buf.␊ |
599 | ␊ |
600 | int write(int fdesc, const char * buf, int count)␊ |
601 | {␊ |
602 | struct iob * io;␊ |
603 | ␊ |
604 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
605 | return (-1);␊ |
606 | ␉␊ |
607 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
608 | count = io->i_filesize - io->i_offset;␊ |
609 | ␉␊ |
610 | if (count <= 0)␊ |
611 | return 0; // end of file␊ |
612 | ␉␊ |
613 | bcopy(buf, io->i_buf + io->i_offset, count);␊ |
614 | ␉␊ |
615 | io->i_offset += count;␊ |
616 | ␉␊ |
617 | return count;␊ |
618 | }␊ |
619 | ␊ |
620 | int writebyte(int fdesc, char value)␊ |
621 | {␊ |
622 | struct iob * io;␊ |
623 | ␊ |
624 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
625 | return (-1);␊ |
626 | ␉␊ |
627 | if ((io->i_offset + 1) > (unsigned int)io->i_filesize)␊ |
628 | return 0; // end of file␊ |
629 | ␉␊ |
630 | io->i_buf[io->i_offset++] = value;␊ |
631 | ␉␊ |
632 | return 1;␊ |
633 | }␊ |
634 | ␊ |
635 | int writeint(int fdesc, int value)␊ |
636 | {␊ |
637 | struct iob * io;␊ |
638 | ␊ |
639 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
640 | return (-1);␊ |
641 | ␉␊ |
642 | if ((io->i_offset + 4) > (unsigned int)io->i_filesize)␊ |
643 | return 0; // end of file␊ |
644 | ␉␊ |
645 | bcopy(&value, io->i_buf + io->i_offset, 4);␊ |
646 | ␉␊ |
647 | io->i_offset += 4;␊ |
648 | ␉␊ |
649 | return 4;␊ |
650 | }␊ |
651 | ␊ |
652 | //==========================================================================␊ |
653 | // file_size() - Returns the size of the file described by the file␊ |
654 | // descriptor.␊ |
655 | ␊ |
656 | int file_size(int fdesc)␊ |
657 | {␊ |
658 | struct iob * io;␊ |
659 | ␊ |
660 | if ((io = iob_from_fdesc(fdesc)) == 0)␊ |
661 | return 0;␊ |
662 | ␊ |
663 | return io->i_filesize;␊ |
664 | }␊ |
665 | ␊ |
666 | //==========================================================================␊ |
667 | ␊ |
668 | struct dirstuff * vol_opendir(BVRef bvr, const char * path)␊ |
669 | {␊ |
670 | struct dirstuff * dirp = 0;␊ |
671 | ␊ |
672 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
673 | if (dirp == NULL)␊ |
674 | goto error;␊ |
675 | ␊ |
676 | dirp->dir_path = newString(path);␊ |
677 | if (dirp->dir_path == NULL)␊ |
678 | goto error;␊ |
679 | ␊ |
680 | dirp->dir_bvr = bvr;␊ |
681 | ␊ |
682 | return dirp;␊ |
683 | ␊ |
684 | error:␊ |
685 | closedir(dirp);␊ |
686 | return NULL;␊ |
687 | }␊ |
688 | ␊ |
689 | //==========================================================================␊ |
690 | ␊ |
691 | struct dirstuff * opendir(const char * path)␊ |
692 | {␊ |
693 | struct dirstuff * dirp = 0;␊ |
694 | const char * dirPath;␊ |
695 | BVRef bvr;␊ |
696 | ␊ |
697 | if ((bvr = getBootVolumeRef(path, &dirPath)) == NULL)␊ |
698 | goto error;␊ |
699 | ␊ |
700 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
701 | if (dirp == NULL)␊ |
702 | goto error;␊ |
703 | ␊ |
704 | dirp->dir_path = newString(dirPath);␊ |
705 | if (dirp->dir_path == NULL)␊ |
706 | goto error;␊ |
707 | ␊ |
708 | dirp->dir_bvr = bvr;␊ |
709 | ␊ |
710 | return dirp;␊ |
711 | ␊ |
712 | error:␊ |
713 | closedir(dirp);␊ |
714 | return NULL;␊ |
715 | }␊ |
716 | ␊ |
717 | //==========================================================================␊ |
718 | ␊ |
719 | int closedir(struct dirstuff * dirp)␊ |
720 | {␊ |
721 | if (dirp) {␊ |
722 | if (dirp->dir_path) free(dirp->dir_path);␊ |
723 | free(dirp);␊ |
724 | }␊ |
725 | return 0;␊ |
726 | }␊ |
727 | ␊ |
728 | //==========================================================================␊ |
729 | ␊ |
730 | int readdir(struct dirstuff * dirp, const char ** name, long * flags,␊ |
731 | long * time)␊ |
732 | {␊ |
733 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
734 | /* dirPath */ dirp->dir_path,␊ |
735 | /* dirIndex */ &dirp->dir_index,␊ |
736 | /* dirEntry */ (char **)name, flags, time,␊ |
737 | 0, 0);␊ |
738 | }␊ |
739 | ␊ |
740 | //==========================================================================␊ |
741 | ␊ |
742 | int readdir_ext(struct dirstuff * dirp, const char ** name, long * flags,␊ |
743 | long * time, FinderInfo *finderInfo, long *infoValid)␊ |
744 | {␊ |
745 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
746 | /* dirPath */ dirp->dir_path,␊ |
747 | /* dirIndex */ &dirp->dir_index,␊ |
748 | /* dirEntry */ (char **)name,␊ |
749 | flags, time,␊ |
750 | finderInfo, infoValid);␊ |
751 | }␊ |
752 | ␊ |
753 | //==========================================================================␊ |
754 | ␊ |
755 | const char * systemConfigDir()␊ |
756 | {␊ |
757 | if (gBootFileType == kNetworkDeviceType)␊ |
758 | ␉return "";␊ |
759 | return "/Library/Preferences/SystemConfiguration";␊ |
760 | }␊ |
761 | ␊ |
762 | //==========================================================================␊ |
763 | ␊ |
764 | int gBootFileType;␊ |
765 | ␊ |
766 | void scanBootVolumes( int biosdev, int * count )␊ |
767 | {␊ |
768 | BVRef bvr = 0;␊ |
769 | ␊ |
770 | bvr = diskScanBootVolumes(biosdev, count);␊ |
771 | if (bvr == NULL)␊ |
772 | {␊ |
773 | bvr = nbpScanBootVolumes(biosdev, count);␊ |
774 | if (bvr != NULL)␊ |
775 | {␊ |
776 | gBootFileType = kNetworkDeviceType;␊ |
777 | }␊ |
778 | }␊ |
779 | else␊ |
780 | {␊ |
781 | gBootFileType = kBlockDeviceType;␊ |
782 | }␊ |
783 | }␊ |
784 | ␊ |
785 | //==========================================================================␊ |
786 | ␊ |
787 | void scanDisks(int biosdev, int *count)␊ |
788 | {␊ |
789 | #define MAX_HDD_COUNT 32␊ |
790 | int bvCount;␊ |
791 | int hd = 0;␊ |
792 | ␊ |
793 | // Testing up to MAX_HDD_COUNT hard drives.␊ |
794 | ␉while(!testBiosread(0x80 + hd, 0) && hd < MAX_HDD_COUNT)␊ |
795 | ␉{␊ |
796 | ␉ bvCount = 0;␊ |
797 | ␉ scanBootVolumes(0x80 + hd, &bvCount);␊ |
798 | hd++;␊ |
799 | ␉}␊ |
800 | ␊ |
801 | // Also scanning CD/DVD drive.␊ |
802 | ␉if (biosDevIsCDROM(gBIOSDev))␊ |
803 | ␉{␊ |
804 | ␉ bvCount = 0;␊ |
805 | ␉scanBootVolumes(gBIOSDev, &bvCount);␊ |
806 | ␉}␊ |
807 | }␊ |
808 | ␊ |
809 | //==========================================================================␊ |
810 | ␊ |
811 | BVRef selectBootVolume( BVRef chain )␊ |
812 | {␊ |
813 | ␉bool filteredChain = false;␊ |
814 | ␉bool foundPrimary = false;␊ |
815 | ␉BVRef bvr, bvr1 = 0, bvr2 = 0;␊ |
816 | ␉␊ |
817 | ␉if (chain->filtered) filteredChain = true;␊ |
818 | ␉␊ |
819 | ␉if (multiboot_partition_set)␊ |
820 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
821 | ␉␉␉if ( bvr->part_no == multiboot_partition && bvr->biosdev == gBIOSDev ) ␊ |
822 | ␉␉␉␉return bvr;␊ |
823 | ␉␊ |
824 | ␉/*␊ |
825 | ␉ * Checking "Default Partition" key in system configuration - use format: hd(x,y) or the volume UUID -␊ |
826 | ␉ * to override the default selection.␊ |
827 | ␉ * We accept only kBVFlagSystemVolume or kBVFlagForeignBoot volumes.␊ |
828 | ␉ */␊ |
829 | ␉␊ |
830 | ␉const char * val;␊ |
831 | ␉char testStr[64];␊ |
832 | ␉int cnt;␊ |
833 | ␉␊ |
834 | ␉if (getValueForKey(kDefaultPartitionKey, &val, &cnt, &bootInfo->bootConfig) && cnt >= 7 && filteredChain)␊ |
835 | ␉{␊ |
836 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
837 | ␉␉{␊ |
838 | ␉␉␉if ( bvr->biosdev >= 0x80 && bvr->biosdev < 0x100␊ |
839 | ␉␉␉␉&& ( bvr->flags & ( kBVFlagSystemVolume|kBVFlagForeignBoot ) ) )␊ |
840 | ␉␉␉{␊ |
841 | ␉␉␉␉// Trying to match hd(x,y) format.␊ |
842 | ␉␉␉␉sprintf(testStr, "hd(%d,%d)", bvr->biosdev - 0x80, bvr->part_no);␊ |
843 | ␉␉␉␉if (strcmp(testStr, val) == 0)␊ |
844 | ␉␉␉␉␉return bvr;␊ |
845 | ␉␉␉␉␊ |
846 | ␉␉␉␉// Trying to match volume UUID.␊ |
847 | ␉␉␉␉if (bvr->fs_getuuid && bvr->fs_getuuid(bvr, testStr) == 0 && strcmp(testStr, val) == 0)␊ |
848 | ␉␉␉␉␉return bvr;␊ |
849 | ␉␉␉}␊ |
850 | ␉␉}␊ |
851 | ␉}␊ |
852 | ␉␊ |
853 | ␉/*␊ |
854 | ␉ * Scannig the volume chain backwards and trying to find ␊ |
855 | ␉ * a HFS+ volume with valid boot record signature.␊ |
856 | ␉ * If not found any active partition then we will␊ |
857 | ␉ * select this volume as the boot volume.␊ |
858 | ␉ */␊ |
859 | ␊ |
860 | ␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
861 | ␉{␊ |
862 | ␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) foundPrimary = true;␊ |
863 | ␉␉// zhell -- Undo a regression that was introduced from r491 to 492.␊ |
864 | ␉␉// if gBIOSBootVolume is set already, no change is required␊ |
865 | ␉␉if ( bvr->flags & (kBVFlagBootable|kBVFlagSystemVolume)␊ |
866 | ␉␉␉&& gBIOSBootVolume␊ |
867 | ␉␉␉&& (!filteredChain || (filteredChain && bvr->visible))␊ |
868 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
869 | ␉␉␉bvr2 = bvr;␊ |
870 | ␉␉// zhell -- if gBIOSBootVolume is NOT set, we use the "if" statement␊ |
871 | ␉␉// from r491,␊ |
872 | ␉␉if ( bvr->flags & kBVFlagBootable␊ |
873 | ␉␉␉&& ! gBIOSBootVolume␊ |
874 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
875 | ␉␉␉bvr2 = bvr;␊ |
876 | ␉}␊ |
877 | ␉␊ |
878 | ␉/*␊ |
879 | ␉ * Use the standrad method for selecting the boot volume.␊ |
880 | ␉ */␊ |
881 | ␉if (foundPrimary)␊ |
882 | ␉{␊ |
883 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
884 | ␉␉{␊ |
885 | ␉␉␉if ( bvr->flags & kBVFlagNativeBoot && bvr->biosdev == gBIOSDev ) bvr1 = bvr;␊ |
886 | ␉␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) bvr2 = bvr;␊ |
887 | ␉␉}␊ |
888 | ␉}␊ |
889 | ␉␊ |
890 | ␉bvr = bvr2 ? bvr2 : bvr1 ? bvr1 : chain;␊ |
891 | ␉␊ |
892 | ␉return bvr;␊ |
893 | }␊ |
894 | ␊ |
895 | //==========================================================================␊ |
896 | ␊ |
897 | #define LP '('␊ |
898 | #define RP ')'␊ |
899 | int gBIOSDev;␊ |
900 | ␊ |
901 | /*!␊ |
902 | This is like boot2's gBootVolume except it is for the internal use of␊ |
903 | libsaio to track which volume an unqualified path should be relative to.␊ |
904 | This replaces bootInfo->kernDev as the carrier of this information.␊ |
905 | */␊ |
906 | static BVRef gRootVolume;␊ |
907 | ␊ |
908 | void setRootVolume(BVRef volume)␊ |
909 | {␊ |
910 | gRootVolume = volume;␊ |
911 | // Veto non-native FS. Basically that means don't allow the root volume to␊ |
912 | // be set to a volume we can't read files from.␊ |
913 | if(gRootVolume != NULL && ((gRootVolume->flags & kBVFlagNativeBoot) == 0))␊ |
914 | gRootVolume = NULL;␊ |
915 | }␊ |
916 | ␊ |
917 | void setBootGlobals(BVRef chain)␊ |
918 | {␊ |
919 | // Record default boot device.␊ |
920 | gBootVolume = selectBootVolume(chain);␊ |
921 | ␊ |
922 | // turbo - Save the ORIGINAL boot volume too for loading our mkext␊ |
923 | if (!gBIOSBootVolume) gBIOSBootVolume = gBootVolume;␊ |
924 | ␊ |
925 | setRootVolume(gBootVolume);␉␊ |
926 | }␊ |
927 | ␊ |
928 | /*!␊ |
929 | Extracts the volume selector from the pathname, returns the selected␊ |
930 | BVRef, and sets *outPath to the remainder of the path.␊ |
931 | If the path did not include a volume selector then the current volume␊ |
932 | is used. When called with a volume selector the current volume␊ |
933 | is changed to the selected volume unless the volume selector is␊ |
934 | that of a ramdisk.␊ |
935 | */␊ |
936 | BVRef getBootVolumeRef( const char * path, const char ** outPath )␊ |
937 | {␊ |
938 | const char * cp;␊ |
939 | BVRef bvr = gRootVolume;␊ |
940 | int biosdev = gBIOSDev;␊ |
941 | ␊ |
942 | // Search for left parenthesis in the path specification.␊ |
943 | ␉//Azi: and the slash??␊ |
944 | for (cp = path; *cp; cp++) {␊ |
945 | if (*cp == LP || *cp == '/') break;␊ |
946 | }␊ |
947 | ␊ |
948 | if (*cp != LP) // no left paren found Azi: meaning it can still have a /␊ |
949 | {␊ |
950 | // Path is using the implicit current device so if there is␊ |
951 | // no current device, then we must fail.␊ |
952 | cp = path;␊ |
953 | if ( gRootVolume == NULL )␊ |
954 | return NULL;␊ |
955 | }␊ |
956 | else if ((cp - path) == 2) // found "xx("␊ |
957 | {␊ |
958 | const struct devsw * dp;␊ |
959 | const char * xp = path;␊ |
960 | int i;␊ |
961 | int unit = -1;␊ |
962 | int part = -1;␊ |
963 | ␊ |
964 | cp++;␊ |
965 | ␊ |
966 | // Check the 2 character device name pointed by 'xp'.␊ |
967 | ␊ |
968 | for (dp = devsw; dp->name; dp++)␊ |
969 | {␊ |
970 | if ((xp[0] == dp->name[0]) && (xp[1] == dp->name[1]))␊ |
971 | break; // found matching entry␊ |
972 | }␊ |
973 | if (dp->name == NULL)␊ |
974 | {␊ |
975 | error("Unknown device '%c%c'\n", xp[0], xp[1]);␊ |
976 | return NULL;␊ |
977 | }␊ |
978 | ␊ |
979 | // Extract the optional unit number from the specification.␊ |
980 | // hd(unit) or hd(unit, part).␊ |
981 | ␊ |
982 | i = 0;␊ |
983 | while (*cp >= '0' && *cp <= '9')␊ |
984 | {␊ |
985 | i = i * 10 + *cp++ - '0';␊ |
986 | unit = i;␊ |
987 | }␊ |
988 | ␊ |
989 | // Unit is no longer optional and never really was.␊ |
990 | // If the user failed to specify it then the unit number from the previous kernDev␊ |
991 | // would have been used which makes little sense anyway.␊ |
992 | // For example, if the user did fd()/foobar and the current root device was the␊ |
993 | // second hard disk (i.e. unit 1) then fd() would select the second floppy drive!␊ |
994 | if(unit == -1)␊ |
995 | return NULL;␊ |
996 | ␊ |
997 | // Extract the optional partition number from the specification.␊ |
998 | ␊ |
999 | if (*cp == ',')␊ |
1000 | part = atoi(++cp);␊ |
1001 | ␊ |
1002 | // If part is not specified part will be -1 whereas before it would have been␊ |
1003 | // whatever the last partition was which makes about zero sense if the device␊ |
1004 | // has been switched.␊ |
1005 | ␊ |
1006 | // Skip past the right paren.␊ |
1007 | ␊ |
1008 | for ( ; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1009 | if (*cp == RP) cp++;␊ |
1010 | ␊ |
1011 | biosdev = dp->biosdev + unit;␊ |
1012 | bvr = newBootVolumeRef(biosdev, part);␊ |
1013 | ␊ |
1014 | if(bvr == NULL)␊ |
1015 | return NULL;␊ |
1016 | }␊ |
1017 | else␊ |
1018 | {␊ |
1019 | // Bad device specifier, skip past the right paren.␊ |
1020 | ␊ |
1021 | for ( cp++; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1022 | if (*cp == RP) cp++;␊ |
1023 | // If gRootVolume was NULL, then bvr will be NULL as well which␊ |
1024 | // should be caught by the caller.␊ |
1025 | }␊ |
1026 | ␊ |
1027 | // Returns the file path following the device spec.␊ |
1028 | // e.g. 'hd(1,b)mach_kernel' is reduced to 'mach_kernel'.␊ |
1029 | ␊ |
1030 | *outPath = cp;␊ |
1031 | ␊ |
1032 | return bvr;␊ |
1033 | }␊ |
1034 | ␊ |
1035 | //==========================================================================␊ |
1036 | // Function name is a misnomer as scanBootVolumes usually calls diskScanBootVolumes␊ |
1037 | // which caches the information. So it's only allocated on the first run.␊ |
1038 | static BVRef newBootVolumeRef( int biosdev, int partno )␊ |
1039 | {␊ |
1040 | ␉BVRef bvr, bvr1, bvrChain;␊ |
1041 | ␊ |
1042 | ␉bvr = bvr1 = NULL;␊ |
1043 | ␊ |
1044 | // Try resolving "rd" and "bt" devices first.␊ |
1045 | ␉if (biosdev == kPseudoBIOSDevRAMDisk)␊ |
1046 | ␉{␊ |
1047 | ␉␉if (gRAMDiskVolume)␊ |
1048 | ␉␉ bvr1 = gRAMDiskVolume;␊ |
1049 | ␉}␊ |
1050 | ␉else if (biosdev == kPseudoBIOSDevBooter)␊ |
1051 | ␉{␊ |
1052 | ␉␉if (gRAMDiskVolume != NULL && gRAMDiskBTAliased)␊ |
1053 | ␉␉␉bvr1 = gRAMDiskVolume;␊ |
1054 | ␉␉else␊ |
1055 | ␉␉␉bvr1 = gBIOSBootVolume;␊ |
1056 | ␉}␊ |
1057 | ␉else␊ |
1058 | ␉{␊ |
1059 | ␉␉// Fetch the volume list from the device.␊ |
1060 | ␊ |
1061 | ␉␉scanBootVolumes( biosdev, NULL );␊ |
1062 | ␉␉bvrChain = getBVChainForBIOSDev(biosdev);␊ |
1063 | ␊ |
1064 | ␉␉// Look for a perfect match based on device and partition number.␊ |
1065 | ␊ |
1066 | ␉␉for ( bvr1 = NULL, bvr = bvrChain; bvr; bvr = bvr->next )␊ |
1067 | ␉␉{␊ |
1068 | ␉␉␉if ( ( bvr->flags & kBVFlagNativeBoot ) == 0 ) continue;␊ |
1069 | ␊ |
1070 | ␉␉␉bvr1 = bvr;␊ |
1071 | ␉␉␉if ( bvr->part_no == partno ) break;␊ |
1072 | ␉␉}␊ |
1073 | ␉}␊ |
1074 | ␊ |
1075 | ␉return bvr ? bvr : bvr1;␊ |
1076 | }␊ |
1077 | ␊ |
1078 | //==========================================================================␊ |
1079 | // getDeviceDescription() - Extracts unit number and partition number␊ |
1080 | // from bvr structure into "dw(u,p)" format.␊ |
1081 | int getDeviceDescription(BVRef bvr, char *str)␊ |
1082 | {␊ |
1083 | ␉const struct devsw *dp;␊ |
1084 | ␉␊ |
1085 | ␉*str = '\0';␊ |
1086 | ␊ |
1087 | ␉if (bvr)␊ |
1088 | ␉{␊ |
1089 | ␉␉for (dp = devsw; dp->name && bvr->biosdev >= dp->biosdev; dp++);␊ |
1090 | ␉␉dp--;␊ |
1091 | ␉␉if (dp->name) sprintf(str, "%s(%d,%d)", dp->name, bvr->biosdev - dp->biosdev, bvr->part_no);␊ |
1092 | ␉␉␊ |
1093 | ␉␉return true;␊ |
1094 | ␉}␊ |
1095 | ␉␊ |
1096 | ␉return false;␊ |
1097 | }␊ |
1098 | |