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