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 "ramdisk.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 | #ifdef 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 | // zef - ramdisk variables␊ |
124 | extern BVRef gRAMDiskVolume;␊ |
125 | extern bool gRAMDiskBTAliased;␊ |
126 | ␊ |
127 | //static BVRef getBootVolumeRef( const char * path, const char ** outPath );␊ |
128 | static BVRef newBootVolumeRef( int biosdev, int partno );␊ |
129 | ␊ |
130 | //==========================================================================␊ |
131 | // LoadVolumeFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
132 | // Load the specified file from the specified volume␊ |
133 | // to the load buffer at LOAD_ADDR.␊ |
134 | // If the file is fat, load only the i386 portion.␊ |
135 | ␊ |
136 | long LoadVolumeFile(BVRef bvr, const char *filePath)␊ |
137 | {␊ |
138 | long fileSize;␊ |
139 | ␊ |
140 | // Read file into load buffer. The data in the load buffer will be␊ |
141 | // overwritten by the next LoadFile() call.␊ |
142 | ␊ |
143 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
144 | ␊ |
145 | fileSize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
146 | ␊ |
147 | // Return the size of the file, or -1 if load failed.␊ |
148 | ␊ |
149 | return fileSize;␊ |
150 | }␊ |
151 | ␊ |
152 | //==========================================================================␊ |
153 | // LoadFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
154 | // Load the specified file to the load buffer at LOAD_ADDR.␊ |
155 | // If the file is fat, load only the i386 portion.␊ |
156 | ␊ |
157 | long LoadFile(const char * fileSpec)␊ |
158 | {␊ |
159 | const char * filePath;␊ |
160 | BVRef bvr;␊ |
161 | ␊ |
162 | // Resolve the boot volume from the file spec.␊ |
163 | ␊ |
164 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
165 | return -1;␊ |
166 | ␊ |
167 | return LoadVolumeFile(bvr, filePath);␊ |
168 | }␊ |
169 | ␊ |
170 | long ReadFileAtOffset(const char * fileSpec, void *buffer, uint64_t offset, uint64_t length)␊ |
171 | {␊ |
172 | const char *filePath;␊ |
173 | BVRef bvr;␊ |
174 | ␊ |
175 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
176 | return -1;␊ |
177 | ␊ |
178 | if (bvr->fs_readfile == NULL)␊ |
179 | return -1;␊ |
180 | ␊ |
181 | return bvr->fs_readfile(bvr, (char *)filePath, buffer, offset, length);␊ |
182 | }␊ |
183 | ␊ |
184 | long LoadThinFatFile(const char *fileSpec, void **binary)␊ |
185 | {␊ |
186 | const char *filePath;␊ |
187 | FSReadFile readFile;␊ |
188 | BVRef bvr;␊ |
189 | unsigned long length, length2;␊ |
190 | ␊ |
191 | // Resolve the boot volume from the file spec.␊ |
192 | ␊ |
193 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
194 | return -1;␊ |
195 | ␊ |
196 | *binary = (void *)kLoadAddr;␊ |
197 | ␊ |
198 | // Read file into load buffer. The data in the load buffer will be␊ |
199 | // overwritten by the next LoadFile() call.␊ |
200 | ␊ |
201 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
202 | ␊ |
203 | readFile = bvr->fs_readfile;␊ |
204 | ␊ |
205 | if (readFile != NULL) {␊ |
206 | // Read the first 4096 bytes (fat header)␊ |
207 | length = readFile(bvr, (char *)filePath, *binary, 0, 0x1000);␊ |
208 | if (length > 0) {␊ |
209 | if (ThinFatFile(binary, &length) == 0) {␊ |
210 | ␉␉␉␉if (length == 0)␊ |
211 | ␉␉␉␉␉return 0;␊ |
212 | // We found a fat binary; read only the thin part␊ |
213 | length = readFile(bvr, (char *)filePath,␊ |
214 | (void *)kLoadAddr, (unsigned long)(*binary) - kLoadAddr, length);␊ |
215 | *binary = (void *)kLoadAddr;␊ |
216 | } else {␊ |
217 | // Not a fat binary; read the rest of the file␊ |
218 | length2 = readFile(bvr, (char *)filePath, (void *)(kLoadAddr + length), length, 0);␊ |
219 | if (length2 == -1) return -1;␊ |
220 | length += length2;␊ |
221 | }␊ |
222 | }␊ |
223 | } else {␊ |
224 | length = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
225 | if (length > 0) {␊ |
226 | ThinFatFile(binary, &length);␊ |
227 | }␊ |
228 | }␊ |
229 | ␊ |
230 | return length;␊ |
231 | }␊ |
232 | ␊ |
233 | #if UNUSED␊ |
234 | long GetFSUUID(char *spec, char *uuidStr)␊ |
235 | {␊ |
236 | BVRef bvr;␊ |
237 | long rval = -1;␊ |
238 | const char *devSpec;␊ |
239 | ␊ |
240 | if ((bvr = getBootVolumeRef(spec, &devSpec)) == NULL)␊ |
241 | return -1;␊ |
242 | ␊ |
243 | if(bvr->fs_getuuid)␊ |
244 | rval = bvr->fs_getuuid(bvr, uuidStr);␊ |
245 | ␊ |
246 | return rval;␊ |
247 | }␊ |
248 | #endif␊ |
249 | ␊ |
250 | // filesystem-specific getUUID functions call this shared string generator␊ |
251 | long CreateUUIDString(uint8_t uubytes[], int nbytes, char *uuidStr)␊ |
252 | {␊ |
253 | unsigned fmtbase, fmtidx, i;␊ |
254 | uint8_t uuidfmt[] = { 4, 2, 2, 2, 6 };␊ |
255 | char *p = uuidStr;␊ |
256 | MD5_CTX md5c;␊ |
257 | uint8_t mdresult[16];␊ |
258 | ␊ |
259 | bzero(mdresult, sizeof(mdresult));␊ |
260 | ␊ |
261 | // just like AppleFileSystemDriver␊ |
262 | MD5Init(&md5c);␊ |
263 | MD5Update(&md5c, kFSUUIDNamespaceSHA1, sizeof(kFSUUIDNamespaceSHA1));␊ |
264 | MD5Update(&md5c, uubytes, nbytes);␊ |
265 | MD5Final(mdresult, &md5c);␊ |
266 | ␊ |
267 | // this UUID has been made version 3 style (i.e. via namespace)␊ |
268 | // see "-uuid-urn-" IETF draft (which otherwise copies byte for byte)␊ |
269 | mdresult[6] = 0x30 | ( mdresult[6] & 0x0F );␊ |
270 | mdresult[8] = 0x80 | ( mdresult[8] & 0x3F );␊ |
271 | ␊ |
272 | ␊ |
273 | // generate the text: e.g. 5EB1869F-C4FA-3502-BDEB-3B8ED5D87292␊ |
274 | i = 0; fmtbase = 0;␊ |
275 | for(fmtidx = 0; fmtidx < sizeof(uuidfmt); fmtidx++) {␊ |
276 | for(i=0; i < uuidfmt[fmtidx]; i++) {␊ |
277 | uint8_t byte = mdresult[fmtbase+i];␊ |
278 | char nib;␊ |
279 | ␊ |
280 | nib = byte >> 4;␊ |
281 | *p = nib + '0'; // 0x4 -> '4'␊ |
282 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
283 | p++;␊ |
284 | ␊ |
285 | nib = byte & 0xf;␊ |
286 | *p = nib + '0'; // 0x4 -> '4'␊ |
287 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
288 | p++;␊ |
289 | ␊ |
290 | }␊ |
291 | fmtbase += i;␊ |
292 | if(fmtidx < sizeof(uuidfmt)-1)␊ |
293 | *(p++) = '-';␊ |
294 | else␊ |
295 | *p = '\0';␊ |
296 | }␊ |
297 | ␊ |
298 | return 0;␊ |
299 | }␊ |
300 | ␊ |
301 | ␊ |
302 | //==========================================================================␊ |
303 | // GetDirEntry - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
304 | // Fetch the next directory entry for the given directory.␊ |
305 | ␊ |
306 | long GetDirEntry(const char * dirSpec, long long * dirIndex, const char ** name, ␊ |
307 | long * flags, long * time)␊ |
308 | {␊ |
309 | const char * dirPath;␊ |
310 | BVRef bvr;␊ |
311 | ␊ |
312 | // Resolve the boot volume from the dir spec.␊ |
313 | ␊ |
314 | if ((bvr = getBootVolumeRef(dirSpec, &dirPath)) == NULL)␊ |
315 | return -1;␊ |
316 | ␊ |
317 | // Return 0 on success, or -1 if there are no additional entries.␊ |
318 | ␊ |
319 | return bvr->fs_getdirentry( bvr,␊ |
320 | /* dirPath */ (char *)dirPath,␊ |
321 | /* dirIndex */ dirIndex,␊ |
322 | /* dirEntry */ (char **)name, flags, time, 0, 0 );␊ |
323 | }␊ |
324 | ␊ |
325 | //==========================================================================␊ |
326 | // GetFileInfo - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
327 | // Get attributes for the specified file.␊ |
328 | ␊ |
329 | static char* gMakeDirSpec;␊ |
330 | ␊ |
331 | long GetFileInfo(const char * dirSpec, const char * name,␊ |
332 | long * flags, long * time)␊ |
333 | {␊ |
334 | long long index = 0;␊ |
335 | const char * entryName;␊ |
336 | ␊ |
337 | if (gMakeDirSpec == 0)␊ |
338 | gMakeDirSpec = (char *)malloc(1024);␊ |
339 | ␊ |
340 | if (!dirSpec) {␊ |
341 | long idx, len;␊ |
342 | ␊ |
343 | len = strlen(name);␊ |
344 | ␊ |
345 | for (idx = len; idx && (name[idx] != '/' && name[idx] != '\\'); idx--) {}␊ |
346 | if (idx == 0) {␊ |
347 | gMakeDirSpec[0] = '/';␊ |
348 | gMakeDirSpec[1] = '\0';␊ |
349 | } else {␊ |
350 | idx++;␊ |
351 | strncpy(gMakeDirSpec, name, idx);␊ |
352 | name += idx;␊ |
353 | }␊ |
354 | dirSpec = gMakeDirSpec;␊ |
355 | }␊ |
356 | ␊ |
357 | while (GetDirEntry(dirSpec, &index, &entryName, flags, time) == 0)␊ |
358 | {␊ |
359 | if (strcmp(entryName, name) == 0)␊ |
360 | return 0; // success␊ |
361 | }␊ |
362 | return -1; // file not found␊ |
363 | }␊ |
364 | ␊ |
365 | long GetFileBlock(const char *fileSpec, unsigned long long *firstBlock)␊ |
366 | {␊ |
367 | const char * filePath;␊ |
368 | BVRef bvr;␊ |
369 | ␊ |
370 | // Resolve the boot volume from the file spec.␊ |
371 | ␊ |
372 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL) {␊ |
373 | verbose("Boot volume for '%s' is bogus\n", fileSpec);␊ |
374 | return -1;␊ |
375 | }␊ |
376 | ␊ |
377 | return bvr->fs_getfileblock(bvr, (char *)filePath, firstBlock);␊ |
378 | }␊ |
379 | ␊ |
380 | //==========================================================================␊ |
381 | // GetFreeFD()␊ |
382 | ␊ |
383 | static int GetFreeFd(void)␊ |
384 | {␊ |
385 | ␉int␉fd;␊ |
386 | ␊ |
387 | ␉// Locate a free descriptor slot.␊ |
388 | ␉for (fd = 0; fd < NFILES; fd++) {␊ |
389 | ␉␉if (iob[fd].i_flgs == 0) {␊ |
390 | ␉␉␉return fd;␊ |
391 | ␉ ␉}␊ |
392 | ␉}␊ |
393 | ␉stop("Out of file descriptors (MAX = %d)", NFILES);␊ |
394 | ␉// not reached␊ |
395 | ␉return -1;␊ |
396 | }␊ |
397 | ␊ |
398 | //==========================================================================␊ |
399 | // iob_from_fdesc()␊ |
400 | //␊ |
401 | // Return a pointer to an allocated 'iob' based on the file descriptor␊ |
402 | // provided. Returns NULL if the file descriptor given is invalid.␊ |
403 | ␊ |
404 | static struct iob * iob_from_fdesc(int fdesc)␊ |
405 | {␊ |
406 | register struct iob * io;␊ |
407 | ␊ |
408 | if (fdesc < 0 || fdesc >= NFILES ||␊ |
409 | ((io = &iob[fdesc])->i_flgs & F_ALLOC) == 0)␊ |
410 | return NULL;␊ |
411 | else␊ |
412 | return io;␊ |
413 | }␊ |
414 | ␊ |
415 | //==========================================================================␊ |
416 | // openmem()␊ |
417 | ␊ |
418 | int openmem(char * buf, int len)␊ |
419 | {␊ |
420 | int fdesc;␊ |
421 | struct iob * io;␊ |
422 | ␊ |
423 | fdesc = GetFreeFd();␊ |
424 | io = &iob[fdesc];␊ |
425 | bzero(io, sizeof(*io));␊ |
426 | ␊ |
427 | // Mark the descriptor as taken. Set the F_MEM flag to indicate␊ |
428 | // that the file buffer is provided by the caller.␊ |
429 | ␊ |
430 | io->i_flgs = F_ALLOC | F_MEM;␊ |
431 | io->i_buf = buf;␊ |
432 | io->i_filesize = len;␊ |
433 | ␊ |
434 | return fdesc;␊ |
435 | }␊ |
436 | ␊ |
437 | //==========================================================================␊ |
438 | // open() - Open the file specified by 'path' for reading.␊ |
439 | ␊ |
440 | static int open_bvr(BVRef bvr, const char *filePath, int flags)␊ |
441 | {␊ |
442 | ␉struct iob␉*io;␊ |
443 | ␉int␉␉fdesc;␊ |
444 | ␉int␉␉i;␊ |
445 | ␊ |
446 | ␉if (bvr == NULL) {␊ |
447 | ␉␉return -1;␊ |
448 | ␉}␊ |
449 | ␊ |
450 | ␉fdesc = GetFreeFd();␊ |
451 | ␉io = &iob[fdesc];␊ |
452 | ␉bzero(io, sizeof(*io));␊ |
453 | ␊ |
454 | ␉// Mark the descriptor as taken.␊ |
455 | ␉io->i_flgs = F_ALLOC;␊ |
456 | ␊ |
457 | ␉// Find the next available memory block in the download buffer.␊ |
458 | ␉io->i_buf = (char *) LOAD_ADDR;␊ |
459 | ␉for (i = 0; i < NFILES; i++) {␊ |
460 | ␉␉if ((iob[i].i_flgs != F_ALLOC) || (i == fdesc)) {␊ |
461 | ␉␉␉continue;␊ |
462 | ␉␉}␊ |
463 | ␉␉io->i_buf = max(iob[i].i_filesize + iob[i].i_buf, io->i_buf);␊ |
464 | ␉}␊ |
465 | ␊ |
466 | ␉// Load entire file into memory. Unnecessary open() calls must be avoided.␊ |
467 | ␉gFSLoadAddress = io->i_buf;␊ |
468 | ␉io->i_filesize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
469 | ␉if (io->i_filesize < 0) {␊ |
470 | ␉␉close(fdesc);␊ |
471 | ␉␉return -1;␊ |
472 | ␉}␊ |
473 | ␉return fdesc;␊ |
474 | }␊ |
475 | ␊ |
476 | int open(const char *path, int flags)␊ |
477 | {␊ |
478 | ␉const char␉*filepath;␊ |
479 | ␉BVRef␉␉bvr;␊ |
480 | ␊ |
481 | ␉// Resolve the boot volume from the file spec.␊ |
482 | ␉if ((bvr = getBootVolumeRef(path, &filepath)) != NULL) {␊ |
483 | ␉␉return open_bvr(bvr, filepath, flags);␊ |
484 | ␉}␊ |
485 | ␉return -1;␊ |
486 | }␊ |
487 | ␊ |
488 | int open_bvdev(const char *bvd, const char *path, int flags)␊ |
489 | {␊ |
490 | const struct devsw␉*dp;␊ |
491 | ␉const char␉␉*cp;␊ |
492 | ␉BVRef␉␉␉bvr;␊ |
493 | ␉int␉␉␉i;␊ |
494 | ␉int␉␉␉len;␊ |
495 | ␉int␉␉␉unit;␊ |
496 | ␉int␉␉␉partition;␊ |
497 | ␊ |
498 | ␉if ((i = open(path, flags)) >= 0) {␊ |
499 | ␉␉return i;␊ |
500 | ␉}␊ |
501 | ␊ |
502 | ␉if (bvd == NULL || (len = strlen(bvd)) < 2) {␊ |
503 | ␉␉return -1;␊ |
504 | ␉}␊ |
505 | ␊ |
506 | ␉for (dp=devsw; dp->name; dp++) {␊ |
507 | ␉␉if (bvd[0] == dp->name[0] && bvd[1] == dp->name[1]) {␊ |
508 | ␉␉␉unit = 0;␊ |
509 | ␉␉␉partition = 0;␊ |
510 | ␉␉␉/* get optional unit and partition */␊ |
511 | ␉␉␉if (len >= 5 && bvd[2] == '(') { /* min must be present xx(0) */␊ |
512 | ␉␉␉␉cp = &bvd[3];␊ |
513 | ␉␉␉␉i = 0;␊ |
514 | ␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
515 | ␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
516 | ␉␉␉␉␉unit = i;␊ |
517 | ␉␉␉␉}␊ |
518 | ␉␉␉␉if (*cp++ == ',') {␊ |
519 | ␉␉␉␉␉i = 0;␊ |
520 | ␉␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
521 | ␉␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
522 | ␉␉␉␉␉␉partition = i;␊ |
523 | ␉␉␉␉␉}␊ |
524 | ␉␉␉␉}␊ |
525 | ␉␉␉}␊ |
526 | ␉␉␉// turbo - bt(0,0) hook␊ |
527 | ␉␉␉if ((dp->biosdev + unit) == 0x101) {␊ |
528 | ␉␉␉␉// zef - use the ramdisk if available and the alias is active.␊ |
529 | ␉␉␉␉if (gRAMDiskVolume != NULL && gRAMDiskBTAliased) {␊ |
530 | ␉␉␉␉␉bvr = gRAMDiskVolume;␊ |
531 | ␉␉␉␉} else {␊ |
532 | ␉␉␉␉␉bvr = gBIOSBootVolume;␊ |
533 | ␉␉␉␉}␊ |
534 | ␉␉␉} else {␊ |
535 | ␉␉␉bvr = newBootVolumeRef(dp->biosdev + unit, partition);␊ |
536 | ␉␉␉}␊ |
537 | ␉␉␉return open_bvr(bvr, path, flags);␊ |
538 | ␉␉}␊ |
539 | }␊ |
540 | ␉return -1;␊ |
541 | }␊ |
542 | ␊ |
543 | //==========================================================================␊ |
544 | // close() - Close a file descriptor.␊ |
545 | ␊ |
546 | int close(int fdesc)␊ |
547 | {␊ |
548 | struct iob * io;␊ |
549 | ␊ |
550 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
551 | return (-1);␊ |
552 | ␊ |
553 | io->i_flgs = 0;␊ |
554 | ␊ |
555 | return 0;␊ |
556 | }␊ |
557 | ␊ |
558 | //==========================================================================␊ |
559 | // lseek() - Reposition the byte offset of the file descriptor from the␊ |
560 | // beginning of the file. Returns the relocated offset.␊ |
561 | ␊ |
562 | int b_lseek(int fdesc, int offset, int ptr)␊ |
563 | {␊ |
564 | struct iob * io;␊ |
565 | ␊ |
566 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
567 | return (-1);␊ |
568 | ␊ |
569 | io->i_offset = offset;␊ |
570 | ␊ |
571 | return offset;␊ |
572 | }␊ |
573 | ␊ |
574 | //==========================================================================␊ |
575 | // tell() - Returns the byte offset of the file descriptor.␊ |
576 | ␊ |
577 | int tell(int fdesc)␊ |
578 | {␊ |
579 | struct iob * io;␊ |
580 | ␊ |
581 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
582 | return 0;␊ |
583 | ␊ |
584 | return io->i_offset;␊ |
585 | }␊ |
586 | ␊ |
587 | //==========================================================================␊ |
588 | // read() - Read up to 'count' bytes of data from the file descriptor␊ |
589 | // into the buffer pointed to by buf.␊ |
590 | ␊ |
591 | int read(int fdesc, char * buf, int count)␊ |
592 | {␊ |
593 | struct iob * io;␊ |
594 | ␊ |
595 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
596 | return (-1);␊ |
597 | ␊ |
598 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
599 | count = io->i_filesize - io->i_offset;␊ |
600 | ␊ |
601 | if (count <= 0)␊ |
602 | return 0; // end of file␊ |
603 | ␊ |
604 | bcopy(io->i_buf + io->i_offset, buf, count);␊ |
605 | ␊ |
606 | io->i_offset += count;␊ |
607 | ␊ |
608 | return count;␊ |
609 | }␊ |
610 | ␊ |
611 | //==========================================================================␊ |
612 | // write() - Write up to 'count' bytes of data to the file descriptor␊ |
613 | // from the buffer pointed to by buf.␊ |
614 | ␊ |
615 | int write(int fdesc, const char * buf, int count)␊ |
616 | {␊ |
617 | struct iob * io;␊ |
618 | ␊ |
619 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
620 | return (-1);␊ |
621 | ␉␊ |
622 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
623 | count = io->i_filesize - io->i_offset;␊ |
624 | ␉␊ |
625 | if (count <= 0)␊ |
626 | return 0; // end of file␊ |
627 | ␉␊ |
628 | bcopy(buf, io->i_buf + io->i_offset, count);␊ |
629 | ␉␊ |
630 | io->i_offset += count;␊ |
631 | ␉␊ |
632 | return count;␊ |
633 | }␊ |
634 | ␊ |
635 | int writebyte(int fdesc, char value)␊ |
636 | {␊ |
637 | struct iob * io;␊ |
638 | ␊ |
639 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
640 | return (-1);␊ |
641 | ␉␊ |
642 | if ((io->i_offset + 1) > (unsigned int)io->i_filesize)␊ |
643 | return 0; // end of file␊ |
644 | ␉␊ |
645 | io->i_buf[io->i_offset++] = value;␊ |
646 | ␉␊ |
647 | return 1;␊ |
648 | }␊ |
649 | ␊ |
650 | int writeint(int fdesc, int value)␊ |
651 | {␊ |
652 | struct iob * io;␊ |
653 | ␊ |
654 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
655 | return (-1);␊ |
656 | ␉␊ |
657 | if ((io->i_offset + 4) > (unsigned int)io->i_filesize)␊ |
658 | return 0; // end of file␊ |
659 | ␉␊ |
660 | bcopy(&value, io->i_buf + io->i_offset, 4);␊ |
661 | ␉␊ |
662 | io->i_offset += 4;␊ |
663 | ␉␊ |
664 | return 4;␊ |
665 | }␊ |
666 | ␊ |
667 | //==========================================================================␊ |
668 | // file_size() - Returns the size of the file described by the file␊ |
669 | // descriptor.␊ |
670 | ␊ |
671 | int file_size(int fdesc)␊ |
672 | {␊ |
673 | struct iob * io;␊ |
674 | ␊ |
675 | if ((io = iob_from_fdesc(fdesc)) == 0)␊ |
676 | return 0;␊ |
677 | ␊ |
678 | return io->i_filesize;␊ |
679 | }␊ |
680 | ␊ |
681 | //==========================================================================␊ |
682 | ␊ |
683 | struct dirstuff * vol_opendir(BVRef bvr, const char * path)␊ |
684 | {␊ |
685 | struct dirstuff * dirp = 0;␊ |
686 | ␊ |
687 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
688 | if (dirp == NULL)␊ |
689 | goto error;␊ |
690 | ␊ |
691 | dirp->dir_path = newString(path);␊ |
692 | if (dirp->dir_path == NULL)␊ |
693 | goto error;␊ |
694 | ␊ |
695 | dirp->dir_bvr = bvr;␊ |
696 | ␊ |
697 | return dirp;␊ |
698 | ␊ |
699 | error:␊ |
700 | closedir(dirp);␊ |
701 | return NULL;␊ |
702 | }␊ |
703 | ␊ |
704 | //==========================================================================␊ |
705 | ␊ |
706 | struct dirstuff * opendir(const char * path)␊ |
707 | {␊ |
708 | struct dirstuff * dirp = 0;␊ |
709 | const char * dirPath;␊ |
710 | BVRef bvr;␊ |
711 | ␊ |
712 | if ((bvr = getBootVolumeRef(path, &dirPath)) == NULL)␊ |
713 | goto error;␊ |
714 | ␊ |
715 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
716 | if (dirp == NULL)␊ |
717 | goto error;␊ |
718 | ␊ |
719 | dirp->dir_path = newString(dirPath);␊ |
720 | if (dirp->dir_path == NULL)␊ |
721 | goto error;␊ |
722 | ␊ |
723 | dirp->dir_bvr = bvr;␊ |
724 | ␊ |
725 | return dirp;␊ |
726 | ␊ |
727 | error:␊ |
728 | closedir(dirp);␊ |
729 | return NULL;␊ |
730 | }␊ |
731 | ␊ |
732 | //==========================================================================␊ |
733 | ␊ |
734 | int closedir(struct dirstuff * dirp)␊ |
735 | {␊ |
736 | if (dirp) {␊ |
737 | if (dirp->dir_path) free(dirp->dir_path);␊ |
738 | free(dirp);␊ |
739 | }␊ |
740 | return 0;␊ |
741 | }␊ |
742 | ␊ |
743 | //==========================================================================␊ |
744 | ␊ |
745 | int readdir(struct dirstuff * dirp, const char ** name, long * flags,␊ |
746 | long * time)␊ |
747 | {␊ |
748 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
749 | /* dirPath */ dirp->dir_path,␊ |
750 | /* dirIndex */ &dirp->dir_index,␊ |
751 | /* dirEntry */ (char **)name, flags, time,␊ |
752 | 0, 0);␊ |
753 | }␊ |
754 | ␊ |
755 | //==========================================================================␊ |
756 | ␊ |
757 | int readdir_ext(struct dirstuff * dirp, const char ** name, long * flags,␊ |
758 | long * time, FinderInfo *finderInfo, long *infoValid)␊ |
759 | {␊ |
760 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
761 | /* dirPath */ dirp->dir_path,␊ |
762 | /* dirIndex */ &dirp->dir_index,␊ |
763 | /* dirEntry */ (char **)name,␊ |
764 | flags, time,␊ |
765 | finderInfo, infoValid);␊ |
766 | }␊ |
767 | ␊ |
768 | //==========================================================================␊ |
769 | ␊ |
770 | const char * systemConfigDir()␊ |
771 | {␊ |
772 | if (gBootFileType == kNetworkDeviceType)␊ |
773 | ␉␉return "";␊ |
774 | return "/Library/Preferences/SystemConfiguration";␊ |
775 | }␊ |
776 | ␊ |
777 | //==========================================================================␊ |
778 | ␊ |
779 | int gBootFileType;␊ |
780 | ␊ |
781 | void scanBootVolumes( int biosdev, int * count )␊ |
782 | {␊ |
783 | BVRef bvr = 0;␊ |
784 | ␊ |
785 | bvr = diskScanBootVolumes(biosdev, count);␊ |
786 | if (bvr == NULL)␊ |
787 | {␊ |
788 | #ifndef OPTION_ROM␊ |
789 | bvr = nbpScanBootVolumes(biosdev, count);␊ |
790 | if (bvr != NULL)␊ |
791 | {␊ |
792 | gBootFileType = kNetworkDeviceType;␊ |
793 | }␊ |
794 | #endif␊ |
795 | }␊ |
796 | else␊ |
797 | {␊ |
798 | gBootFileType = kBlockDeviceType;␊ |
799 | }␊ |
800 | }␊ |
801 | ␊ |
802 | //==========================================================================␊ |
803 | ␊ |
804 | void scanDisks(int biosdev, int *count)␊ |
805 | {␊ |
806 | #define MAX_HDD_COUNT 32␊ |
807 | int bvCount;␊ |
808 | int hd = 0;␊ |
809 | ␉␊ |
810 | // Testing up to MAX_HDD_COUNT hard drives.␊ |
811 | ␉while(!testBiosread(0x80 + hd, 0) && hd < MAX_HDD_COUNT) ␊ |
812 | ␉{␊ |
813 | ␉␉bvCount = 0;␊ |
814 | ␉␉scanBootVolumes(0x80 + hd, &bvCount);␊ |
815 | ␉␉verbose("scanVolume %d\n", hd);␊ |
816 | ␉␉␊ |
817 | ␉␉hd++;␊ |
818 | ␉}␊ |
819 | ␊ |
820 | // Also scanning CD/DVD drive.␊ |
821 | ␉// if (biosDevIsCDROM(gBIOSDev))␊ |
822 | ␉if (biosDevIsCDROM(gBIOSDev)) // 0 = CDROM␊ |
823 | ␉{␊ |
824 | ␉␉bvCount = 0;␊ |
825 | ␉␉//scanBootVolumes(gBIOSDev, &bvCount);␊ |
826 | ␉␉scanBootVolumes(gBIOSDev, &bvCount);␊ |
827 | ␉␉msglog("biosDevIsCDROM and bvCount=%d\n", bvCount);␊ |
828 | ␉}␊ |
829 | ␉␊ |
830 | ␉*count = bvCount; //Slice - !␊ |
831 | ␉␊ |
832 | }␊ |
833 | ␊ |
834 | //==========================================================================␊ |
835 | ␊ |
836 | BVRef selectBootVolume( BVRef chain )␊ |
837 | {␊ |
838 | ␉bool filteredChain = false;␊ |
839 | ␉bool foundPrimary = false;␊ |
840 | ␉BVRef bvr, bvr1 = 0, bvr2 = 0;␊ |
841 | ␉␊ |
842 | ␉if (chain->filtered) filteredChain = true;␊ |
843 | ␉␊ |
844 | #ifdef UNUSED␊ |
845 | ␉if (multiboot_partition_set)␊ |
846 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next ){␊ |
847 | ␉␉␉msglog("Check muiltiboot: biosdev=%d type=0x%x flags=0x%x part_no=%d\n",␊ |
848 | ␉␉␉␉ bvr->biosdev, bvr->type, bvr->flags, bvr->part_no);␊ |
849 | ␉␉␉if ( bvr->part_no == multiboot_partition && bvr->biosdev == gBIOSDev ) ␊ |
850 | ␉␉␉␉return bvr;␊ |
851 | ␉␉}␊ |
852 | #endif␊ |
853 | ␉/*␊ |
854 | ␉ * Checking "Default Partition" key in system configuration - use format: hd(x,y), the volume UUID or label -␊ |
855 | ␉ * to override the default selection.␊ |
856 | ␉ * We accept only kBVFlagSystemVolume or kBVFlagForeignBoot volumes.␊ |
857 | ␉ */␊ |
858 | ␉char *val = XMLDecode(getStringForKey(kDefaultPartition, &bootInfo->bootConfig));␊ |
859 | if (val) {␊ |
860 | for ( bvr = chain; bvr; bvr = bvr->next ) {␊ |
861 | if (matchVolumeToString(bvr, val, false)) {␊ |
862 | free(val);␊ |
863 | return bvr;␊ |
864 | }␊ |
865 | }␊ |
866 | free(val);␊ |
867 | }␊ |
868 | ␉␊ |
869 | ␉/*␊ |
870 | ␉ * Scannig the volume chain backwards and trying to find ␊ |
871 | ␉ * a HFS+ volume with valid boot record signature.␊ |
872 | ␉ * If not found any active partition then we will␊ |
873 | ␉ * select this volume as the boot volume.␊ |
874 | ␉ */␊ |
875 | ␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
876 | ␉{␊ |
877 | //␉␉msglog("scanning chain: biosdev=%d type=0x%x flags=0x%x part_no=%d\n",␊ |
878 | //␉␉␉ bvr->biosdev, bvr->type, bvr->flags, bvr->part_no);␊ |
879 | ␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) foundPrimary = true;␊ |
880 | ␉␉// zhell -- Undo a regression that was introduced from r491 to 492.␊ |
881 | ␉␉// if gBIOSBootVolume is set already, no change is required␊ |
882 | ␉␉if ( bvr->flags & (kBVFlagBootable|kBVFlagSystemVolume)␊ |
883 | ␉␉␉&& gBIOSBootVolume␊ |
884 | ␉␉␉&& (!filteredChain || (filteredChain && bvr->visible))␊ |
885 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
886 | ␉␉␉bvr2 = bvr;␊ |
887 | ␉␉// zhell -- if gBIOSBootVolume is NOT set, we use the "if" statement␊ |
888 | ␉␉// from r491,␊ |
889 | ␉␉if ( bvr->flags & kBVFlagBootable␊ |
890 | ␉␉␉&& ! gBIOSBootVolume␊ |
891 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
892 | ␉␉␉bvr2 = bvr;␊ |
893 | ␉} ␊ |
894 | ␉␊ |
895 | ␉␊ |
896 | ␉/*␊ |
897 | ␉ * Use the standard method for selecting the boot volume.␊ |
898 | ␉ */␊ |
899 | ␉if (foundPrimary)␊ |
900 | ␉{␊ |
901 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
902 | ␉␉{␊ |
903 | ␉␉␉if ( bvr->flags & kBVFlagNativeBoot && bvr->biosdev == gBIOSDev ) bvr1 = bvr;␊ |
904 | ␉␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) bvr2 = bvr;␊ |
905 | ␉␉}␊ |
906 | ␉␉//msglog("foundPrimary and flags bvr1=%x bvr2=%x\n", bvr1->flags, bvr2->flags);//foundPrimary and flags bvr1=a bvr2=4b␊ |
907 | ␉}␊ |
908 | ␉␊ |
909 | ␉bvr = bvr2 ? bvr2 :␊ |
910 | ␉bvr1 ? bvr1 : chain;␊ |
911 | ␉␊ |
912 | ␉return bvr;␊ |
913 | }␊ |
914 | ␊ |
915 | //==========================================================================␊ |
916 | ␊ |
917 | #define LP '('␊ |
918 | #define RP ')'␊ |
919 | int gBIOSDev;␊ |
920 | ␊ |
921 | /*!␊ |
922 | This is like boot2's gBootVolume except it is for the internal use of␊ |
923 | libsaio to track which volume an unqualified path should be relative to.␊ |
924 | This replaces bootInfo->kernDev as the carrier of this information.␊ |
925 | */␊ |
926 | static BVRef gRootVolume;␊ |
927 | ␊ |
928 | void setRootVolume(BVRef volume)␊ |
929 | {␊ |
930 | gRootVolume = volume;␊ |
931 | // Veto non-native FS. Basically that means don't allow the root volume to␊ |
932 | // be set to a volume we can't read files from.␊ |
933 | if(gRootVolume != NULL && ((gRootVolume->flags & kBVFlagNativeBoot) == 0))␊ |
934 | gRootVolume = NULL;␊ |
935 | }␊ |
936 | ␊ |
937 | void setBootGlobals(BVRef chain)␊ |
938 | {␊ |
939 | // Record default boot device.␊ |
940 | gBootVolume = selectBootVolume(chain);␊ |
941 | ␊ |
942 | // turbo - Save the ORIGINAL boot volume too for loading our mkext␊ |
943 | if (!gBIOSBootVolume) gBIOSBootVolume = gBootVolume;␊ |
944 | ␊ |
945 | setRootVolume(gBootVolume);␉␊ |
946 | }␊ |
947 | ␊ |
948 | /*!␊ |
949 | Extracts the volume selector from the pathname, returns the selected␊ |
950 | BVRef, and sets *outPath to the remainder of the path.␊ |
951 | If the path did not include a volume selector then the current volume␊ |
952 | is used. When called with a volume selector the current volume␊ |
953 | is changed to the selected volume unless the volume selector is␊ |
954 | that of a ramdisk.␊ |
955 | */␊ |
956 | BVRef getBootVolumeRef( const char * path, const char ** outPath )␊ |
957 | {␊ |
958 | const char * cp;␊ |
959 | BVRef bvr = gRootVolume;␊ |
960 | int biosdev = gBIOSDev;␊ |
961 | ␊ |
962 | // Search for left parenthesis in the path specification.␊ |
963 | ␊ |
964 | for (cp = path; *cp; cp++) {␊ |
965 | if (*cp == LP || *cp == '/') break;␊ |
966 | }␊ |
967 | ␊ |
968 | if (*cp != LP) // no left paren found␊ |
969 | {␊ |
970 | // Path is using the implicit current device so if there is␊ |
971 | // no current device, then we must fail.␊ |
972 | cp = path;␊ |
973 | if ( gRootVolume == NULL )␊ |
974 | return NULL;␊ |
975 | }␊ |
976 | else if ((cp - path) == 2) // found "xx("␊ |
977 | {␊ |
978 | const struct devsw * dp;␊ |
979 | const char * xp = path;␊ |
980 | int i;␊ |
981 | int unit = -1;␊ |
982 | int part = -1;␊ |
983 | ␊ |
984 | cp++;␊ |
985 | ␊ |
986 | // Check the 2 character device name pointed by 'xp'.␊ |
987 | ␊ |
988 | for (dp = devsw; dp->name; dp++)␊ |
989 | {␊ |
990 | if ((xp[0] == dp->name[0]) && (xp[1] == dp->name[1]))␊ |
991 | break; // found matching entry␊ |
992 | }␊ |
993 | if (dp->name == NULL)␊ |
994 | {␊ |
995 | error("Unknown device '%c%c'\n", xp[0], xp[1]);␊ |
996 | return NULL;␊ |
997 | }␊ |
998 | ␊ |
999 | // Extract the optional unit number from the specification.␊ |
1000 | // hd(unit) or hd(unit, part).␊ |
1001 | ␊ |
1002 | i = 0;␊ |
1003 | while (*cp >= '0' && *cp <= '9')␊ |
1004 | {␊ |
1005 | i = i * 10 + *cp++ - '0';␊ |
1006 | unit = i;␊ |
1007 | }␊ |
1008 | ␊ |
1009 | // Unit is no longer optional and never really was.␊ |
1010 | // If the user failed to specify it then the unit number from the previous kernDev␊ |
1011 | // would have been used which makes little sense anyway.␊ |
1012 | // For example, if the user did fd()/foobar and the current root device was the␊ |
1013 | // second hard disk (i.e. unit 1) then fd() would select the second floppy drive!␊ |
1014 | if(unit == -1)␊ |
1015 | return NULL;␊ |
1016 | ␊ |
1017 | // Extract the optional partition number from the specification.␊ |
1018 | ␊ |
1019 | if (*cp == ',')␊ |
1020 | part = atoi(++cp);␊ |
1021 | ␊ |
1022 | // If part is not specified part will be -1 whereas before it would have been␊ |
1023 | // whatever the last partition was which makes about zero sense if the device␊ |
1024 | // has been switched.␊ |
1025 | ␊ |
1026 | // Skip past the right paren.␊ |
1027 | ␊ |
1028 | for ( ; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1029 | if (*cp == RP) cp++;␊ |
1030 | ␊ |
1031 | biosdev = dp->biosdev + unit;␊ |
1032 | ␊ |
1033 | // turbo - bt(0,0) hook␊ |
1034 | if (biosdev == 0x101)␊ |
1035 | {␊ |
1036 | // zef - use the ramdisk if available and the alias is active.␊ |
1037 | if (gRAMDiskVolume != NULL && gRAMDiskBTAliased)␊ |
1038 | bvr = gRAMDiskVolume;␊ |
1039 | else␊ |
1040 | bvr = gBIOSBootVolume;␊ |
1041 | }␊ |
1042 | else␊ |
1043 | {␊ |
1044 | ␉bvr = newBootVolumeRef(biosdev, part);␊ |
1045 | }␊ |
1046 | ␊ |
1047 | if(bvr == NULL)␊ |
1048 | return NULL;␊ |
1049 | }␊ |
1050 | else␊ |
1051 | {␊ |
1052 | // Bad device specifier, skip past the right paren.␊ |
1053 | ␊ |
1054 | for ( cp++; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1055 | if (*cp == RP) cp++;␊ |
1056 | // If gRootVolume was NULL, then bvr will be NULL as well which␊ |
1057 | // should be caught by the caller.␊ |
1058 | }␊ |
1059 | ␊ |
1060 | // Returns the file path following the device spec.␊ |
1061 | // e.g. 'hd(1,b)mach_kernel' is reduced to 'mach_kernel'.␊ |
1062 | ␊ |
1063 | *outPath = cp;␊ |
1064 | ␊ |
1065 | return bvr;␊ |
1066 | }␊ |
1067 | ␊ |
1068 | //==========================================================================␊ |
1069 | // Function name is a misnomer as scanBootVolumes usually calls diskScanBootVolumes␊ |
1070 | // which caches the information. So it's only allocated on the first run.␊ |
1071 | static BVRef newBootVolumeRef( int biosdev, int partno )␊ |
1072 | {␊ |
1073 | ␉BVRef bvr, bvr1, bvrChain;␊ |
1074 | ␊ |
1075 | ␉bvr = bvr1 = NULL;␊ |
1076 | ␊ |
1077 | // Try resolving "rd" and "bt" devices first.␊ |
1078 | #ifndef OPTION_ROM␊ |
1079 | ␉if (biosdev == kPseudoBIOSDevRAMDisk)␊ |
1080 | ␉{␊ |
1081 | ␉␉if (gRAMDiskVolume)␊ |
1082 | ␉␉ bvr1 = gRAMDiskVolume;␊ |
1083 | ␉}␊ |
1084 | ␉else ␊ |
1085 | #endif␊ |
1086 | ␉if (biosdev == kPseudoBIOSDevBooter)␊ |
1087 | ␉{␊ |
1088 | #ifndef OPTION_ROM␊ |
1089 | ␉␉if (gRAMDiskVolume != NULL && gRAMDiskBTAliased)␊ |
1090 | ␉␉␉bvr1 = gRAMDiskVolume;␊ |
1091 | ␉␉else␊ |
1092 | #endif␊ |
1093 | ␉␉␉bvr1 = gBIOSBootVolume;␊ |
1094 | ␉}␊ |
1095 | ␉else␊ |
1096 | ␉{␊ |
1097 | ␉␉// Fetch the volume list from the device.␊ |
1098 | ␊ |
1099 | ␉␉scanBootVolumes( biosdev, NULL );␊ |
1100 | ␉␉bvrChain = getBVChainForBIOSDev(biosdev);␊ |
1101 | ␊ |
1102 | ␉␉// Look for a perfect match based on device and partition number.␊ |
1103 | ␊ |
1104 | ␉␉for ( bvr1 = NULL, bvr = bvrChain; bvr; bvr = bvr->next )␊ |
1105 | ␉␉{␊ |
1106 | ␉␉␉if ( ( bvr->flags & kBVFlagNativeBoot ) == 0 ) continue;␊ |
1107 | ␊ |
1108 | ␉␉␉bvr1 = bvr;␊ |
1109 | ␉␉␉if ( bvr->part_no == partno ) break;␊ |
1110 | ␉␉}␊ |
1111 | ␉}␊ |
1112 | ␊ |
1113 | ␉return bvr ? bvr : bvr1;␊ |
1114 | }␊ |
1115 | ␊ |
1116 | //==========================================================================␊ |
1117 | // getDeviceDescription() - Extracts unit number and partition number␊ |
1118 | // from bvr structure into "dw(u,p)" format.␊ |
1119 | // Returns length of the out string␊ |
1120 | int getDeviceDescription(BVRef bvr, char *str)␊ |
1121 | {␊ |
1122 | if(!str)␊ |
1123 | return 0;␊ |
1124 | ␊ |
1125 | ␉*str = '\0';␊ |
1126 | ␊ |
1127 | ␉if (bvr)␊ |
1128 | ␉{␊ |
1129 | const struct devsw *dp = devsw;␊ |
1130 | ␉␉while(dp->name && bvr->biosdev >= dp->biosdev)␊ |
1131 | dp++;␊ |
1132 | ␊ |
1133 | ␉␉dp--;␊ |
1134 | ␉␉if (dp->name)␊ |
1135 | return sprintf(str, "%s(%d,%d)", dp->name, bvr->biosdev - dp->biosdev, bvr->part_no);␊ |
1136 | ␉}␊ |
1137 | ␉␊ |
1138 | ␉return 0;␊ |
1139 | }␊ |
1140 | |