1 | /*␊ |
2 | * Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.␊ |
3 | *␊ |
4 | * @APPLE_LICENSE_HEADER_START@␊ |
5 | * ␊ |
6 | * Portions Copyright (c) 1999-2003 Apple Computer, Inc. All Rights␊ |
7 | * Reserved. This file contains Original Code and/or Modifications of␊ |
8 | * Original Code as defined in and that are subject to the Apple Public␊ |
9 | * Source License Version 2.0 (the "License"). You may not use this file␊ |
10 | * except in compliance with the License. Please obtain a copy of the␊ |
11 | * License at http://www.apple.com/publicsource and read it before using␊ |
12 | * this file.␊ |
13 | * ␊ |
14 | * The Original Code and all software distributed under the License are␊ |
15 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
16 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
17 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
18 | * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the␊ |
19 | * License for the specific language governing rights and limitations␊ |
20 | * under the License.␊ |
21 | * ␊ |
22 | * @APPLE_LICENSE_HEADER_END@␊ |
23 | */␊ |
24 | /* ␊ |
25 | * Mach Operating System␊ |
26 | * Copyright (c) 1990 Carnegie-Mellon University␊ |
27 | * Copyright (c) 1989 Carnegie-Mellon University␊ |
28 | * Copyright (c) 1988 Carnegie-Mellon University␊ |
29 | * Copyright (c) 1987 Carnegie-Mellon University␊ |
30 | * All rights reserved. The CMU software License Agreement specifies␊ |
31 | * the terms and conditions for use and redistribution.␊ |
32 | *␊ |
33 | */␊ |
34 | /*␊ |
35 | * HISTORY␊ |
36 | * Revision 2.3 88/08/08 13:47:07 rvb␊ |
37 | * Allocate buffers dynamically vs statically.␊ |
38 | * Now b[i] and i_fs and i_buf, are allocated dynamically.␊ |
39 | * boot_calloc(size) allocates and zeros a buffer rounded to a NPG␊ |
40 | * boundary.␊ |
41 | * Generalize boot spec to allow, xx()/mach, xx(n,[a..h])/mach,␊ |
42 | * xx([a..h])/mach, ...␊ |
43 | * Also default "xx" if unspecified and alloc just "/mach",␊ |
44 | * where everything is defaulted␊ |
45 | * Add routine, ptol(), to parse partition letters.␊ |
46 | *␊ |
47 | */␊ |
48 | ␊ |
49 | /*␊ |
50 | * Copyright (c) 1982, 1986 Regents of the University of California.␊ |
51 | * All rights reserved. The Berkeley software License Agreement␊ |
52 | * specifies the terms and conditions for redistribution.␊ |
53 | *␊ |
54 | *␉@(#)sys.c␉7.1 (Berkeley) 6/5/86␊ |
55 | */␊ |
56 | ␊ |
57 | /* Copyright 2007 VMware Inc.␊ |
58 | "Preboot" ramdisk support added by David Elliott␊ |
59 | */␊ |
60 | ␊ |
61 | #include <AvailabilityMacros.h>␊ |
62 | ␊ |
63 | #include "libsaio.h"␊ |
64 | #include "boot.h"␊ |
65 | #include "bootstruct.h"␊ |
66 | #include "disk.h"␊ |
67 | #include "modules.h"␊ |
68 | #include "xml.h"␊ |
69 | #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5␊ |
70 | # include <Kernel/libkern/crypto/md5.h>␊ |
71 | #else␊ |
72 | # include <sys/md5.h>␊ |
73 | #endif␊ |
74 | #include <uuid/uuid.h>␊ |
75 | #if 0 /* No OS X release has ever included this. */␊ |
76 | #include <Kernel/uuid/namespace.h>␊ |
77 | #else␊ |
78 | /* copied from uuid/namespace.h, just like BootX's fs.c does. */␊ |
79 | UUID_DEFINE( kFSUUIDNamespaceSHA1, 0xB3, 0xE2, 0x0F, 0x39, 0xF2, 0x92, 0x11, 0xD6, 0x97, 0xA4, 0x00, 0x30, 0x65, 0x43, 0xEC, 0xAC );␊ |
80 | #endif␊ |
81 | ␊ |
82 | #if UNUSED␊ |
83 | extern int multiboot_partition;␊ |
84 | extern int multiboot_partition_set;␊ |
85 | #endif␊ |
86 | ␊ |
87 | struct devsw {␊ |
88 | const char * name;␊ |
89 | // size increased from char to short to handle non-BIOS internal devices␊ |
90 | unsigned short biosdev;␊ |
91 | int type;␊ |
92 | };␊ |
93 | ␊ |
94 | // Device entries must be ordered by bios device numbers. ␊ |
95 | static struct devsw devsw[] =␊ |
96 | {␊ |
97 | { "hd", 0x80, kBIOSDevTypeHardDrive }, /* DEV_HD */␊ |
98 | { "en", 0xE0, kBIOSDevTypeNetwork }, /* DEV_EN */␊ |
99 | { "rd", 0x100, kBIOSDevTypeHardDrive },␊ |
100 | { "bt", 0x101, kBIOSDevTypeHardDrive }, // turbo - type for booter partition␊ |
101 | { 0, 0 }␊ |
102 | };␊ |
103 | ␊ |
104 | // Pseudo BIOS devices␊ |
105 | enum {␊ |
106 | ␉kPseudoBIOSDevRAMDisk = 0x100,␊ |
107 | ␉kPseudoBIOSDevBooter = 0x101␊ |
108 | };␊ |
109 | ␊ |
110 | /*␊ |
111 | * Max number of file descriptors.␊ |
112 | */␊ |
113 | #define NFILES 6␊ |
114 | ␊ |
115 | static struct iob iob[NFILES];␊ |
116 | ␊ |
117 | void * gFSLoadAddress = 0;␊ |
118 | ␊ |
119 | // Turbo - save what we think is our original BIOS boot volume if we have one 0xab␊ |
120 | BVRef gBIOSBootVolume = NULL;␊ |
121 | BVRef gBootVolume;␊ |
122 | ␊ |
123 | //static BVRef getBootVolumeRef( const char * path, const char ** outPath );␊ |
124 | static BVRef newBootVolumeRef( int biosdev, int partno );␊ |
125 | ␊ |
126 | //==========================================================================␊ |
127 | // LoadVolumeFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
128 | // Load the specified file from the specified volume␊ |
129 | // to the load buffer at LOAD_ADDR.␊ |
130 | // If the file is fat, load only the i386 portion.␊ |
131 | ␊ |
132 | long LoadVolumeFile(BVRef bvr, const char *filePath)␊ |
133 | {␊ |
134 | long fileSize;␊ |
135 | ␊ |
136 | // Read file into load buffer. The data in the load buffer will be␊ |
137 | // overwritten by the next LoadFile() call.␊ |
138 | ␊ |
139 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
140 | ␊ |
141 | fileSize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
142 | ␊ |
143 | // Return the size of the file, or -1 if load failed.␊ |
144 | ␊ |
145 | return fileSize;␊ |
146 | }␊ |
147 | ␊ |
148 | //==========================================================================␊ |
149 | // LoadFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
150 | // Load the specified file to the load buffer at LOAD_ADDR.␊ |
151 | // If the file is fat, load only the i386 portion.␊ |
152 | ␊ |
153 | long LoadFile(const char * fileSpec)␊ |
154 | {␊ |
155 | const char * filePath;␊ |
156 | BVRef bvr;␊ |
157 | ␊ |
158 | // Resolve the boot volume from the file spec.␊ |
159 | ␊ |
160 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
161 | return -1;␊ |
162 | ␊ |
163 | return LoadVolumeFile(bvr, filePath);␊ |
164 | }␊ |
165 | ␊ |
166 | long ReadFileAtOffset(const char * fileSpec, void *buffer, uint64_t offset, uint64_t length)␊ |
167 | {␊ |
168 | const char *filePath;␊ |
169 | BVRef bvr;␊ |
170 | ␊ |
171 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
172 | return -1;␊ |
173 | ␊ |
174 | if (bvr->fs_readfile == NULL)␊ |
175 | return -1;␊ |
176 | ␊ |
177 | return bvr->fs_readfile(bvr, (char *)filePath, buffer, offset, length);␊ |
178 | }␊ |
179 | ␊ |
180 | long LoadThinFatFile(const char *fileSpec, void **binary)␊ |
181 | {␊ |
182 | const char *filePath;␊ |
183 | FSReadFile readFile;␊ |
184 | BVRef bvr;␊ |
185 | unsigned long length/*, length2*/; ␊ |
186 | ␉long 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 | ␉␉␉␉if (length2 < 0) return -1;␊ |
218 | ␊ |
219 | length += (unsigned long)length2;␊ |
220 | }␊ |
221 | }␊ |
222 | } else {␊ |
223 | length = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
224 | if (length > 0) {␊ |
225 | ThinFatFile(binary, &length);␊ |
226 | }␊ |
227 | }␊ |
228 | ␊ |
229 | return length;␊ |
230 | }␊ |
231 | ␊ |
232 | // filesystem-specific getUUID functions call this shared string generator␊ |
233 | long CreateUUIDString(uint8_t uubytes[], int nbytes, char *uuidStr)␊ |
234 | {␊ |
235 | unsigned fmtbase, fmtidx, i;␊ |
236 | uint8_t uuidfmt[] = { 4, 2, 2, 2, 6 };␊ |
237 | char *p = uuidStr;␊ |
238 | MD5_CTX md5c;␊ |
239 | uint8_t mdresult[16];␊ |
240 | ␊ |
241 | bzero(mdresult, sizeof(mdresult));␊ |
242 | ␊ |
243 | // just like AppleFileSystemDriver␊ |
244 | MD5Init(&md5c);␊ |
245 | MD5Update(&md5c, kFSUUIDNamespaceSHA1, sizeof(kFSUUIDNamespaceSHA1));␊ |
246 | MD5Update(&md5c, uubytes, nbytes);␊ |
247 | MD5Final(mdresult, &md5c);␊ |
248 | ␊ |
249 | // this UUID has been made version 3 style (i.e. via namespace)␊ |
250 | // see "-uuid-urn-" IETF draft (which otherwise copies byte for byte)␊ |
251 | mdresult[6] = 0x30 | ( mdresult[6] & 0x0F );␊ |
252 | mdresult[8] = 0x80 | ( mdresult[8] & 0x3F );␊ |
253 | ␊ |
254 | ␊ |
255 | // generate the text: e.g. 5EB1869F-C4FA-3502-BDEB-3B8ED5D87292␊ |
256 | i = 0; fmtbase = 0;␊ |
257 | for(fmtidx = 0; fmtidx < sizeof(uuidfmt); fmtidx++) {␊ |
258 | for(i=0; i < uuidfmt[fmtidx]; i++) {␊ |
259 | uint8_t byte = mdresult[fmtbase+i];␊ |
260 | char nib;␊ |
261 | ␊ |
262 | nib = byte >> 4;␊ |
263 | *p = nib + '0'; // 0x4 -> '4'␊ |
264 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
265 | p++;␊ |
266 | ␊ |
267 | nib = byte & 0xf;␊ |
268 | *p = nib + '0'; // 0x4 -> '4'␊ |
269 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
270 | p++;␊ |
271 | ␊ |
272 | }␊ |
273 | fmtbase += i;␊ |
274 | if(fmtidx < sizeof(uuidfmt)-1)␊ |
275 | *(p++) = '-';␊ |
276 | else␊ |
277 | *p = '\0';␊ |
278 | }␊ |
279 | ␊ |
280 | return 0;␊ |
281 | }␊ |
282 | ␊ |
283 | ␊ |
284 | //==========================================================================␊ |
285 | // GetDirEntry - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
286 | // Fetch the next directory entry for the given directory.␊ |
287 | ␊ |
288 | long GetDirEntry(const char * dirSpec, long long * dirIndex, const char ** name, ␊ |
289 | long * flags, long * time)␊ |
290 | {␊ |
291 | const char * dirPath;␊ |
292 | BVRef bvr;␊ |
293 | ␊ |
294 | // Resolve the boot volume from the dir spec.␊ |
295 | ␊ |
296 | if ((bvr = getBootVolumeRef(dirSpec, &dirPath)) == NULL)␊ |
297 | return -1;␊ |
298 | ␊ |
299 | // Return 0 on success, or -1 if there are no additional entries.␊ |
300 | ␊ |
301 | return bvr->fs_getdirentry( bvr,␊ |
302 | /* dirPath */ (char *)dirPath,␊ |
303 | /* dirIndex */ dirIndex,␊ |
304 | /* dirEntry */ (char **)name, flags, time, 0, 0 );␊ |
305 | }␊ |
306 | ␊ |
307 | //==========================================================================␊ |
308 | // GetFileInfo - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
309 | // Get attributes for the specified file.␊ |
310 | ␊ |
311 | static char* gMakeDirSpec;␊ |
312 | ␊ |
313 | long GetFileInfo(const char * dirSpec, const char * name,␊ |
314 | long * flags, long * time)␊ |
315 | {␊ |
316 | long long index = 0;␊ |
317 | const char * entryName;␊ |
318 | ␊ |
319 | if (gMakeDirSpec == 0)␊ |
320 | gMakeDirSpec = (char *)malloc(1024);␊ |
321 | ␊ |
322 | if (!dirSpec) {␊ |
323 | long idx, len;␊ |
324 | ␊ |
325 | len = strlen(name);␊ |
326 | ␊ |
327 | for (idx = len; idx && (name[idx] != '/' && name[idx] != '\\'); idx--) {}␊ |
328 | if (idx == 0) {␊ |
329 | gMakeDirSpec[0] = '/';␊ |
330 | gMakeDirSpec[1] = '\0';␊ |
331 | } else {␊ |
332 | idx++;␊ |
333 | strncpy(gMakeDirSpec, name, idx);␊ |
334 | name += idx;␊ |
335 | }␊ |
336 | dirSpec = gMakeDirSpec;␊ |
337 | }␊ |
338 | ␊ |
339 | while (GetDirEntry(dirSpec, &index, &entryName, flags, time) == 0)␊ |
340 | {␊ |
341 | if (strcmp(entryName, name) == 0)␊ |
342 | return 0; // success␊ |
343 | }␊ |
344 | return -1; // file not found␊ |
345 | }␊ |
346 | ␊ |
347 | //==========================================================================␊ |
348 | // GetFreeFD()␊ |
349 | ␊ |
350 | static int GetFreeFd(void)␊ |
351 | {␊ |
352 | ␉int␉fd;␊ |
353 | ␊ |
354 | ␉// Locate a free descriptor slot.␊ |
355 | ␉for (fd = 0; fd < NFILES; fd++) {␊ |
356 | ␉␉if (iob[fd].i_flgs == 0) {␊ |
357 | ␉␉␉return fd;␊ |
358 | ␉ ␉}␊ |
359 | ␉}␊ |
360 | ␉stop("Out of file descriptors");␊ |
361 | ␉// not reached␊ |
362 | ␉return -1;␊ |
363 | }␊ |
364 | ␊ |
365 | //==========================================================================␊ |
366 | // iob_from_fdesc()␊ |
367 | //␊ |
368 | // Return a pointer to an allocated 'iob' based on the file descriptor␊ |
369 | // provided. Returns NULL if the file descriptor given is invalid.␊ |
370 | ␊ |
371 | static struct iob * iob_from_fdesc(int fdesc)␊ |
372 | {␊ |
373 | register struct iob * io;␊ |
374 | ␊ |
375 | if (fdesc < 0 || fdesc >= NFILES ||␊ |
376 | ((io = &iob[fdesc])->i_flgs & F_ALLOC) == 0)␊ |
377 | return NULL;␊ |
378 | else␊ |
379 | return io;␊ |
380 | }␊ |
381 | ␊ |
382 | //==========================================================================␊ |
383 | // open() - Open the file specified by 'path' for reading.␊ |
384 | #if UNUSED␊ |
385 | static int open_bvr(BVRef bvr, const char *filePath, int flags)␊ |
386 | #else␊ |
387 | static int open_bvr(BVRef bvr, const char *filePath)␊ |
388 | #endif␊ |
389 | {␊ |
390 | ␉struct iob␉*io;␊ |
391 | ␉int␉␉fdesc;␊ |
392 | ␉int␉␉i;␊ |
393 | ␊ |
394 | ␉if (bvr == NULL) {␊ |
395 | ␉␉return -1;␊ |
396 | ␉}␊ |
397 | ␊ |
398 | ␉fdesc = GetFreeFd();␊ |
399 | ␉io = &iob[fdesc];␊ |
400 | ␉bzero(io, sizeof(*io));␊ |
401 | ␊ |
402 | ␉// Mark the descriptor as taken.␊ |
403 | ␉io->i_flgs = F_ALLOC;␊ |
404 | ␊ |
405 | ␉// Find the next available memory block in the download buffer.␊ |
406 | ␉io->i_buf = (char *) LOAD_ADDR;␊ |
407 | ␉for (i = 0; i < NFILES; i++) {␊ |
408 | ␉␉if ((iob[i].i_flgs != F_ALLOC) || (i == fdesc)) {␊ |
409 | ␉␉␉continue;␊ |
410 | ␉␉}␊ |
411 | ␉␉io->i_buf = max(iob[i].i_filesize + iob[i].i_buf, io->i_buf);␊ |
412 | ␉}␊ |
413 | ␊ |
414 | ␉// Load entire file into memory. Unnecessary open() calls must be avoided.␊ |
415 | ␉gFSLoadAddress = io->i_buf;␊ |
416 | ␉io->i_filesize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
417 | ␉if (io->i_filesize < 0) {␊ |
418 | ␉␉close(fdesc);␊ |
419 | ␉␉return -1;␊ |
420 | ␉}␊ |
421 | ␉return fdesc;␊ |
422 | }␊ |
423 | ␊ |
424 | #if UNUSED␊ |
425 | int open(const char *path, int flags)␊ |
426 | #else␊ |
427 | int open(const char *path)␊ |
428 | #endif␊ |
429 | {␊ |
430 | ␉const char␉*filepath;␊ |
431 | ␉BVRef␉␉bvr;␊ |
432 | ␊ |
433 | ␉// Resolve the boot volume from the file spec.␊ |
434 | ␉if ((bvr = getBootVolumeRef(path, &filepath)) != NULL) {␊ |
435 | #if UNUSED␊ |
436 | ␉␉return open_bvr(bvr, filepath, flags);␊ |
437 | #else␊ |
438 | return open_bvr(bvr, filepath);␊ |
439 | #endif␊ |
440 | ␉}␊ |
441 | ␉return -1;␊ |
442 | }␊ |
443 | ␊ |
444 | #if UNUSED␊ |
445 | int open_bvdev(const char *bvd, const char *path, int flags)␊ |
446 | #else␊ |
447 | int open_bvdev(const char *bvd, const char *path)␊ |
448 | #endif␊ |
449 | {␊ |
450 | const struct devsw␉*dp;␊ |
451 | ␉const char␉␉*cp;␊ |
452 | ␉BVRef␉␉␉bvr;␊ |
453 | ␉int␉␉␉i;␊ |
454 | ␉int␉␉␉len;␊ |
455 | ␉int␉␉␉unit;␊ |
456 | ␉int␉␉␉partition;␊ |
457 | ␊ |
458 | ␉if ((i = open(path)) >= 0) {␊ |
459 | ␉␉return i;␊ |
460 | ␉}␊ |
461 | ␊ |
462 | ␉if (bvd == NULL || (len = strlen(bvd)) < 2) {␊ |
463 | ␉␉return -1;␊ |
464 | ␉}␊ |
465 | ␊ |
466 | ␉for (dp=devsw; dp->name; dp++) {␊ |
467 | ␉␉if (bvd[0] == dp->name[0] && bvd[1] == dp->name[1]) {␊ |
468 | ␉␉␉unit = 0;␊ |
469 | ␉␉␉partition = 0;␊ |
470 | ␉␉␉/* get optional unit and partition */␊ |
471 | ␉␉␉if (len >= 5 && bvd[2] == '(') { /* min must be present xx(0) */␊ |
472 | ␉␉␉␉cp = &bvd[3];␊ |
473 | ␉␉␉␉i = 0;␊ |
474 | ␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
475 | ␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
476 | ␉␉␉␉␉unit = i;␊ |
477 | ␉␉␉␉}␊ |
478 | ␉␉␉␉if (*cp++ == ',') {␊ |
479 | ␉␉␉␉␉i = 0;␊ |
480 | ␉␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
481 | ␉␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
482 | ␉␉␉␉␉␉partition = i;␊ |
483 | ␉␉␉␉␉}␊ |
484 | ␉␉␉␉}␊ |
485 | ␉␉␉}␊ |
486 | ␉␉␉bvr = newBootVolumeRef(dp->biosdev + unit, partition);␊ |
487 | #if UNUSED␊ |
488 | return open_bvr(bvr, path, flags);␊ |
489 | #else␊ |
490 | return open_bvr(bvr, path);␊ |
491 | #endif␊ |
492 | ␉␉}␊ |
493 | }␊ |
494 | ␉return -1;␊ |
495 | }␊ |
496 | ␊ |
497 | //==========================================================================␊ |
498 | // close() - Close a file descriptor.␊ |
499 | ␊ |
500 | int close(int fdesc)␊ |
501 | {␊ |
502 | struct iob * io;␊ |
503 | ␊ |
504 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
505 | return (-1);␊ |
506 | ␊ |
507 | io->i_flgs = 0;␊ |
508 | ␊ |
509 | return 0;␊ |
510 | }␊ |
511 | ␊ |
512 | //==========================================================================␊ |
513 | // read() - Read up to 'count' bytes of data from the file descriptor␊ |
514 | // into the buffer pointed to by buf.␊ |
515 | ␊ |
516 | int read(int fdesc, char * buf, int count)␊ |
517 | {␊ |
518 | struct iob * io;␊ |
519 | ␊ |
520 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
521 | return (-1);␊ |
522 | ␊ |
523 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
524 | count = io->i_filesize - io->i_offset;␊ |
525 | ␊ |
526 | if (count <= 0)␊ |
527 | return 0; // end of file␊ |
528 | ␊ |
529 | bcopy(io->i_buf + io->i_offset, buf, count);␊ |
530 | ␊ |
531 | io->i_offset += count;␊ |
532 | ␊ |
533 | return count;␊ |
534 | }␊ |
535 | ␊ |
536 | //==========================================================================␊ |
537 | // file_size() - Returns the size of the file described by the file␊ |
538 | // descriptor.␊ |
539 | ␊ |
540 | int file_size(int fdesc)␊ |
541 | {␊ |
542 | struct iob * io;␊ |
543 | ␊ |
544 | if ((io = iob_from_fdesc(fdesc)) == 0)␊ |
545 | return 0;␊ |
546 | ␊ |
547 | return io->i_filesize;␊ |
548 | }␊ |
549 | ␊ |
550 | //==========================================================================␊ |
551 | ␊ |
552 | struct dirstuff * opendir(const char * path)␊ |
553 | {␊ |
554 | struct dirstuff * dirp = 0;␊ |
555 | const char * dirPath;␊ |
556 | BVRef bvr;␊ |
557 | ␊ |
558 | if ((bvr = getBootVolumeRef(path, &dirPath)) == NULL)␊ |
559 | goto error;␊ |
560 | ␊ |
561 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
562 | if (dirp == NULL)␊ |
563 | goto error;␊ |
564 | ␊ |
565 | dirp->dir_path = newString(dirPath);␊ |
566 | if (dirp->dir_path == NULL)␊ |
567 | goto error;␊ |
568 | ␊ |
569 | dirp->dir_bvr = bvr;␊ |
570 | ␊ |
571 | return dirp;␊ |
572 | ␊ |
573 | error:␊ |
574 | closedir(dirp);␊ |
575 | return NULL;␊ |
576 | }␊ |
577 | ␊ |
578 | //==========================================================================␊ |
579 | ␊ |
580 | int closedir(struct dirstuff * dirp)␊ |
581 | {␊ |
582 | if (dirp) {␊ |
583 | if (dirp->dir_path) free(dirp->dir_path);␊ |
584 | free(dirp);␊ |
585 | }␊ |
586 | return 0;␊ |
587 | }␊ |
588 | ␊ |
589 | //==========================================================================␊ |
590 | ␊ |
591 | int readdir(struct dirstuff * dirp, const char ** name, long * flags,␊ |
592 | long * time)␊ |
593 | {␊ |
594 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
595 | /* dirPath */ dirp->dir_path,␊ |
596 | /* dirIndex */ &dirp->dir_index,␊ |
597 | /* dirEntry */ (char **)name, flags, time,␊ |
598 | 0, 0);␊ |
599 | }␊ |
600 | ␊ |
601 | #if UNUSED␊ |
602 | long GetFSUUID(char *spec, char *uuidStr)␊ |
603 | {␊ |
604 | BVRef bvr;␊ |
605 | long rval = -1;␊ |
606 | const char *devSpec;␊ |
607 | ␉␊ |
608 | if ((bvr = getBootVolumeRef(spec, &devSpec)) == NULL)␊ |
609 | return -1;␊ |
610 | ␉␊ |
611 | if(bvr->fs_getuuid)␊ |
612 | rval = bvr->fs_getuuid(bvr, uuidStr);␊ |
613 | ␉␊ |
614 | return rval;␊ |
615 | }␊ |
616 | ␊ |
617 | long GetFileBlock(const char *fileSpec, unsigned long long *firstBlock)␊ |
618 | {␊ |
619 | const char * filePath;␊ |
620 | BVRef bvr;␊ |
621 | ␉␊ |
622 | // Resolve the boot volume from the file spec.␊ |
623 | ␉␊ |
624 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL) {␊ |
625 | printf("Boot volume for '%s' is bogus\n", fileSpec);␊ |
626 | return -1;␊ |
627 | }␊ |
628 | ␉␊ |
629 | return bvr->fs_getfileblock(bvr, (char *)filePath, firstBlock);␊ |
630 | }␊ |
631 | ␊ |
632 | //==========================================================================␊ |
633 | // openmem()␊ |
634 | ␊ |
635 | int openmem(char * buf, int len)␊ |
636 | {␊ |
637 | int fdesc;␊ |
638 | struct iob * io;␊ |
639 | ␉␊ |
640 | fdesc = GetFreeFd();␊ |
641 | io = &iob[fdesc];␊ |
642 | bzero(io, sizeof(*io));␊ |
643 | ␉␊ |
644 | // Mark the descriptor as taken. Set the F_MEM flag to indicate␊ |
645 | // that the file buffer is provided by the caller.␊ |
646 | ␉␊ |
647 | io->i_flgs = F_ALLOC | F_MEM;␊ |
648 | io->i_buf = buf;␊ |
649 | io->i_filesize = len;␊ |
650 | ␉␊ |
651 | return fdesc;␊ |
652 | }␊ |
653 | ␊ |
654 | //==========================================================================␊ |
655 | // lseek() - Reposition the byte offset of the file descriptor from the␊ |
656 | // beginning of the file. Returns the relocated offset.␊ |
657 | ␊ |
658 | int b_lseek(int fdesc, int offset, int ptr)␊ |
659 | {␊ |
660 | struct iob * io;␊ |
661 | ␉␊ |
662 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
663 | return (-1);␊ |
664 | ␉␊ |
665 | io->i_offset = offset;␊ |
666 | ␉␊ |
667 | return offset;␊ |
668 | }␊ |
669 | ␊ |
670 | //==========================================================================␊ |
671 | // tell() - Returns the byte offset of the file descriptor.␊ |
672 | ␊ |
673 | int tell(int fdesc)␊ |
674 | {␊ |
675 | struct iob * io;␊ |
676 | ␉␊ |
677 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
678 | return 0;␊ |
679 | ␉␊ |
680 | return io->i_offset;␊ |
681 | }␊ |
682 | ␊ |
683 | //==========================================================================␊ |
684 | // write() - Write up to 'count' bytes of data to the file descriptor␊ |
685 | // from the buffer pointed to by buf.␊ |
686 | ␊ |
687 | int write(int fdesc, const char * buf, int count)␊ |
688 | {␊ |
689 | struct iob * io;␊ |
690 | ␊ |
691 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
692 | return (-1);␊ |
693 | ␉␊ |
694 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
695 | count = io->i_filesize - io->i_offset;␊ |
696 | ␉␊ |
697 | if (count <= 0)␊ |
698 | return 0; // end of file␊ |
699 | ␉␊ |
700 | bcopy(buf, io->i_buf + io->i_offset, count);␊ |
701 | ␉␊ |
702 | io->i_offset += count;␊ |
703 | ␉␊ |
704 | return count;␊ |
705 | }␊ |
706 | ␊ |
707 | int writebyte(int fdesc, char value)␊ |
708 | {␊ |
709 | struct iob * io;␊ |
710 | ␊ |
711 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
712 | return (-1);␊ |
713 | ␉␊ |
714 | if ((io->i_offset + 1) > (unsigned int)io->i_filesize)␊ |
715 | return 0; // end of file␊ |
716 | ␉␊ |
717 | io->i_buf[io->i_offset++] = value;␊ |
718 | ␉␊ |
719 | return 1;␊ |
720 | }␊ |
721 | ␊ |
722 | int writeint(int fdesc, int value)␊ |
723 | {␊ |
724 | struct iob * io;␊ |
725 | ␊ |
726 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
727 | return (-1);␊ |
728 | ␉␊ |
729 | if ((io->i_offset + 4) > (unsigned int)io->i_filesize)␊ |
730 | return 0; // end of file␊ |
731 | ␉␊ |
732 | bcopy(&value, io->i_buf + io->i_offset, 4);␊ |
733 | ␉␊ |
734 | io->i_offset += 4;␊ |
735 | ␉␊ |
736 | return 4;␊ |
737 | }␊ |
738 | //==========================================================================␊ |
739 | ␊ |
740 | struct dirstuff * vol_opendir(BVRef bvr, const char * path)␊ |
741 | {␊ |
742 | struct dirstuff * dirp = 0;␊ |
743 | ␉␊ |
744 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
745 | if (dirp == NULL)␊ |
746 | goto error;␊ |
747 | ␉␊ |
748 | dirp->dir_path = newString(path);␊ |
749 | if (dirp->dir_path == NULL)␊ |
750 | goto error;␊ |
751 | ␉␊ |
752 | dirp->dir_bvr = bvr;␊ |
753 | ␉␊ |
754 | return dirp;␊ |
755 | ␉␊ |
756 | error:␊ |
757 | closedir(dirp);␊ |
758 | return NULL;␊ |
759 | }␊ |
760 | ␊ |
761 | //==========================================================================␊ |
762 | ␊ |
763 | int readdir_ext(struct dirstuff * dirp, const char ** name, long * flags,␊ |
764 | long * time, FinderInfo *finderInfo, long *infoValid)␊ |
765 | {␊ |
766 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
767 | /* dirPath */ dirp->dir_path,␊ |
768 | /* dirIndex */ &dirp->dir_index,␊ |
769 | /* dirEntry */ (char **)name,␊ |
770 | flags, time,␊ |
771 | finderInfo, infoValid);␊ |
772 | }␊ |
773 | //==========================================================================␊ |
774 | ␊ |
775 | const char * systemConfigDir()␊ |
776 | {␊ |
777 | if (gBootFileType == kNetworkDeviceType)␊ |
778 | ␉return "";␊ |
779 | return "/Library/Preferences/SystemConfiguration";␊ |
780 | }␊ |
781 | ␊ |
782 | #endif␊ |
783 | ␊ |
784 | //==========================================================================␊ |
785 | ␊ |
786 | int gBootFileType;␊ |
787 | ␊ |
788 | void scanBootVolumes( int biosdev, int * count )␊ |
789 | {␊ |
790 | BVRef bvr = 0;␊ |
791 | ␊ |
792 | bvr = diskScanBootVolumes(biosdev, count);␊ |
793 | if (bvr == NULL)␊ |
794 | {␊ |
795 | #ifdef NBP_SUPPORT␊ |
796 | bvr = nbpScanBootVolumes(biosdev, count);␊ |
797 | if (bvr != NULL)␊ |
798 | {␊ |
799 | gBootFileType = kNetworkDeviceType;␊ |
800 | }␊ |
801 | #endif␊ |
802 | }␊ |
803 | else␊ |
804 | {␊ |
805 | gBootFileType = kBlockDeviceType;␊ |
806 | }␊ |
807 | }␊ |
808 | ␊ |
809 | //==========================================================================␊ |
810 | #if UNUSED␊ |
811 | void scanDisks(int biosdev, int *count)␊ |
812 | #else␊ |
813 | void scanDisks(void)␊ |
814 | #endif␊ |
815 | {␊ |
816 | #define MAX_HDD_COUNT 32␊ |
817 | int bvCount;␊ |
818 | int hd = 0;␊ |
819 | ␊ |
820 | // Testing up to MAX_HDD_COUNT hard drives.␊ |
821 | ␉while(!testBiosread(0x80 + hd, 0) && hd < MAX_HDD_COUNT)␊ |
822 | ␉{␊ |
823 | ␉ bvCount = 0;␊ |
824 | ␉ scanBootVolumes(0x80 + hd, &bvCount);␊ |
825 | hd++;␊ |
826 | ␉}␊ |
827 | ␊ |
828 | // Also scanning CD/DVD drive.␊ |
829 | ␉if (biosDevIsCDROM(gBIOSDev))␊ |
830 | ␉{␊ |
831 | ␉ bvCount = 0;␊ |
832 | ␉scanBootVolumes(gBIOSDev, &bvCount);␊ |
833 | ␉}␊ |
834 | }␊ |
835 | ␊ |
836 | //==========================================================================␊ |
837 | ␊ |
838 | BVRef selectBootVolume( BVRef chain )␊ |
839 | {␊ |
840 | ␉bool filteredChain = false;␊ |
841 | ␉bool foundPrimary = false;␊ |
842 | ␉BVRef bvr, bvr1 = 0, bvr2 = 0;␊ |
843 | ␉␊ |
844 | ␉if (chain->filtered) filteredChain = true;␊ |
845 | ␉␊ |
846 | #if UNUSED␊ |
847 | ␉if (multiboot_partition_set)␊ |
848 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
849 | ␉␉␉if ( bvr->part_no == multiboot_partition && bvr->biosdev == gBIOSDev ) ␊ |
850 | ␉␉␉␉return bvr;␊ |
851 | #endif␊ |
852 | ␉/*␊ |
853 | ␉ * Checking "Default Partition" key in system configuration - use format: hd(x,y), the volume UUID or label -␊ |
854 | ␉ * to override the default selection.␊ |
855 | ␉ * We accept only kBVFlagSystemVolume or kBVFlagForeignBoot volumes.␊ |
856 | ␉ */␊ |
857 | ␉char *val = XMLDecode(getStringForKey(kDefaultPartition, &bootInfo->bootConfig));␊ |
858 | if (val) {␊ |
859 | for ( bvr = chain; bvr; bvr = bvr->next ) {␊ |
860 | if (matchVolumeToString(bvr, val, false)) {␊ |
861 | free(val);␊ |
862 | return bvr;␊ |
863 | }␊ |
864 | }␊ |
865 | free(val);␊ |
866 | }␉␊ |
867 | ␉␊ |
868 | ␉/*␊ |
869 | ␉ * Scannig the volume chain backwards and trying to find ␊ |
870 | ␉ * a HFS+ volume with valid boot record signature.␊ |
871 | ␉ * If not found any active partition then we will␊ |
872 | ␉ * select this volume as the boot volume.␊ |
873 | ␉ */␊ |
874 | ␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
875 | ␉{␊ |
876 | ␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) foundPrimary = true;␊ |
877 | ␉␉// zhell -- Undo a regression that was introduced from r491 to 492.␊ |
878 | ␉␉// if gBIOSBootVolume is set already, no change is required␊ |
879 | ␉␉if ( bvr->flags & (kBVFlagBootable|kBVFlagSystemVolume)␊ |
880 | ␉␉␉&& gBIOSBootVolume␊ |
881 | ␉␉␉&& (!filteredChain || (filteredChain && bvr->visible))␊ |
882 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
883 | ␉␉␉bvr2 = bvr;␊ |
884 | ␉␉// zhell -- if gBIOSBootVolume is NOT set, we use the "if" statement␊ |
885 | ␉␉// from r491,␊ |
886 | ␉␉if ( bvr->flags & kBVFlagBootable␊ |
887 | ␉␉␉&& ! gBIOSBootVolume␊ |
888 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
889 | ␉␉␉bvr2 = bvr;␊ |
890 | ␉} ␊ |
891 | ␉␊ |
892 | ␉␊ |
893 | ␉/*␊ |
894 | ␉ * Use the standrad method for selecting the boot volume.␊ |
895 | ␉ */␊ |
896 | ␉if (foundPrimary)␊ |
897 | ␉{␊ |
898 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
899 | ␉␉{␊ |
900 | ␉␉␉if ( bvr->flags & kBVFlagNativeBoot && bvr->biosdev == gBIOSDev ) bvr1 = bvr;␊ |
901 | ␉␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) bvr2 = bvr;␊ |
902 | ␉␉}␊ |
903 | ␉}␊ |
904 | ␉␊ |
905 | ␉bvr = bvr2 ? bvr2 :␊ |
906 | ␉bvr1 ? bvr1 : chain;␊ |
907 | ␉␊ |
908 | ␉return bvr;␊ |
909 | }␊ |
910 | ␊ |
911 | //==========================================================================␊ |
912 | ␊ |
913 | #define LP '('␊ |
914 | #define RP ')'␊ |
915 | int gBIOSDev;␊ |
916 | ␊ |
917 | /*!␊ |
918 | This is like boot2's gBootVolume except it is for the internal use of␊ |
919 | libsaio to track which volume an unqualified path should be relative to.␊ |
920 | This replaces bootInfo->kernDev as the carrier of this information.␊ |
921 | */␊ |
922 | static BVRef gRootVolume;␊ |
923 | ␊ |
924 | void setRootVolume(BVRef volume)␊ |
925 | {␊ |
926 | gRootVolume = volume;␊ |
927 | // Veto non-native FS. Basically that means don't allow the root volume to␊ |
928 | // be set to a volume we can't read files from.␊ |
929 | if(gRootVolume != NULL && ((gRootVolume->flags & kBVFlagNativeBoot) == 0))␊ |
930 | gRootVolume = NULL;␊ |
931 | }␊ |
932 | ␊ |
933 | void setBootGlobals(BVRef chain)␊ |
934 | {␊ |
935 | // Record default boot device.␊ |
936 | gBootVolume = selectBootVolume(chain);␊ |
937 | ␊ |
938 | // turbo - Save the ORIGINAL boot volume too for loading our mkext␊ |
939 | if (!gBIOSBootVolume) gBIOSBootVolume = gBootVolume;␊ |
940 | ␊ |
941 | setRootVolume(gBootVolume);␉␊ |
942 | }␊ |
943 | ␊ |
944 | /*!␊ |
945 | Extracts the volume selector from the pathname, returns the selected␊ |
946 | BVRef, and sets *outPath to the remainder of the path.␊ |
947 | If the path did not include a volume selector then the current volume␊ |
948 | is used. When called with a volume selector the current volume␊ |
949 | is changed to the selected volume unless the volume selector is␊ |
950 | that of a ramdisk.␊ |
951 | */␊ |
952 | BVRef getBootVolumeRef( const char * path, const char ** outPath )␊ |
953 | {␊ |
954 | const char * cp;␊ |
955 | BVRef bvr = gRootVolume;␊ |
956 | int biosdev = gBIOSDev;␊ |
957 | ␊ |
958 | // Search for left parenthesis in the path specification.␊ |
959 | ␊ |
960 | for (cp = path; *cp; cp++) {␊ |
961 | if (*cp == LP || *cp == '/') break;␊ |
962 | }␊ |
963 | ␊ |
964 | if (*cp != LP) // no left paren found␊ |
965 | {␊ |
966 | // Path is using the implicit current device so if there is␊ |
967 | // no current device, then we must fail.␊ |
968 | cp = path;␊ |
969 | if ( gRootVolume == NULL )␊ |
970 | return NULL;␊ |
971 | }␊ |
972 | else if ((cp - path) == 2) // found "xx("␊ |
973 | {␊ |
974 | const struct devsw * dp;␊ |
975 | const char * xp = path;␊ |
976 | int i;␊ |
977 | int unit = -1;␊ |
978 | int part = -1;␊ |
979 | ␊ |
980 | cp++;␊ |
981 | ␊ |
982 | // Check the 2 character device name pointed by 'xp'.␊ |
983 | ␊ |
984 | for (dp = devsw; dp->name; dp++)␊ |
985 | {␊ |
986 | if ((xp[0] == dp->name[0]) && (xp[1] == dp->name[1]))␊ |
987 | break; // found matching entry␊ |
988 | }␊ |
989 | if (dp->name == NULL)␊ |
990 | {␊ |
991 | error("Unknown device '%c%c'\n", xp[0], xp[1]);␊ |
992 | return NULL;␊ |
993 | }␊ |
994 | ␊ |
995 | // Extract the optional unit number from the specification.␊ |
996 | // hd(unit) or hd(unit, part).␊ |
997 | ␊ |
998 | i = 0;␊ |
999 | while (*cp >= '0' && *cp <= '9')␊ |
1000 | {␊ |
1001 | i = i * 10 + *cp++ - '0';␊ |
1002 | unit = i;␊ |
1003 | }␊ |
1004 | ␊ |
1005 | // Unit is no longer optional and never really was.␊ |
1006 | // If the user failed to specify it then the unit number from the previous kernDev␊ |
1007 | // would have been used which makes little sense anyway.␊ |
1008 | // For example, if the user did fd()/foobar and the current root device was the␊ |
1009 | // second hard disk (i.e. unit 1) then fd() would select the second floppy drive!␊ |
1010 | if(unit == -1)␊ |
1011 | return NULL;␊ |
1012 | ␊ |
1013 | // Extract the optional partition number from the specification.␊ |
1014 | ␊ |
1015 | if (*cp == ',')␊ |
1016 | part = atoi(++cp);␊ |
1017 | ␊ |
1018 | // If part is not specified part will be -1 whereas before it would have been␊ |
1019 | // whatever the last partition was which makes about zero sense if the device␊ |
1020 | // has been switched.␊ |
1021 | ␊ |
1022 | // Skip past the right paren.␊ |
1023 | ␊ |
1024 | for ( ; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1025 | if (*cp == RP) cp++;␊ |
1026 | ␊ |
1027 | biosdev = dp->biosdev + unit;␊ |
1028 | bvr = newBootVolumeRef(biosdev, part);␊ |
1029 | ␊ |
1030 | if(bvr == NULL)␊ |
1031 | return NULL;␊ |
1032 | }␊ |
1033 | else␊ |
1034 | {␊ |
1035 | // Bad device specifier, skip past the right paren.␊ |
1036 | ␊ |
1037 | for ( cp++; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1038 | if (*cp == RP) cp++;␊ |
1039 | // If gRootVolume was NULL, then bvr will be NULL as well which␊ |
1040 | // should be caught by the caller.␊ |
1041 | }␊ |
1042 | ␊ |
1043 | // Returns the file path following the device spec.␊ |
1044 | // e.g. 'hd(1,b)mach_kernel' is reduced to 'mach_kernel'.␊ |
1045 | ␊ |
1046 | *outPath = cp;␊ |
1047 | ␊ |
1048 | return bvr;␊ |
1049 | }␊ |
1050 | ␊ |
1051 | //==========================================================================␊ |
1052 | // Function name is a misnomer as scanBootVolumes usually calls diskScanBootVolumes␊ |
1053 | // which caches the information. So it's only allocated on the first run.␊ |
1054 | static BVRef newBootVolumeRef( int biosdev, int partno )␊ |
1055 | {␊ |
1056 | ␉BVRef bvr, bvr1, bvrChain;␊ |
1057 | ␊ |
1058 | ␉bvr = bvr1 = NULL;␊ |
1059 | ␊ |
1060 | // Try resolving "rd" and "bt" devices first.␊ |
1061 | ␉execute_hook("newRamDisk_BVR", &biosdev, &bvr1, NULL, NULL, NULL, NULL);␊ |
1062 | ␉␊ |
1063 | // Try resolving "rd" and "bt" devices first.␊ |
1064 | ␉␊ |
1065 | ␉if (biosdev == kPseudoBIOSDevBooter)␊ |
1066 | ␉{␊ |
1067 | ␉␉if (bvr1 == NULL )␊ |
1068 | ␉␉␉bvr1 = gBIOSBootVolume;␊ |
1069 | ␉}␊ |
1070 | ␉else␊ |
1071 | ␉{␊ |
1072 | ␉␉// Fetch the volume list from the device.␊ |
1073 | ␊ |
1074 | ␉␉scanBootVolumes( biosdev, NULL );␊ |
1075 | ␉␉bvrChain = getBVChainForBIOSDev(biosdev);␊ |
1076 | ␊ |
1077 | ␉␉// Look for a perfect match based on device and partition number.␊ |
1078 | ␊ |
1079 | ␉␉for ( bvr1 = NULL, bvr = bvrChain; bvr; bvr = bvr->next )␊ |
1080 | ␉␉{␊ |
1081 | ␉␉␉if ( ( bvr->flags & kBVFlagNativeBoot ) == 0 ) continue;␊ |
1082 | ␊ |
1083 | ␉␉␉bvr1 = bvr;␊ |
1084 | ␉␉␉if ( bvr->part_no == partno ) break;␊ |
1085 | ␉␉}␊ |
1086 | ␉}␊ |
1087 | ␊ |
1088 | ␉return bvr ? bvr : bvr1;␊ |
1089 | }␊ |
1090 | ␊ |
1091 | //==========================================================================␊ |
1092 | // getDeviceDescription() - Extracts unit number and partition number␊ |
1093 | // from bvr structure into "dw(u,p)" format.␊ |
1094 | // Returns length of the out string␊ |
1095 | int getDeviceDescription(BVRef bvr, char *str)␊ |
1096 | {␊ |
1097 | if(!str)␊ |
1098 | return 0;␊ |
1099 | ␊ |
1100 | ␉*str = '\0';␊ |
1101 | ␊ |
1102 | ␉if (bvr)␊ |
1103 | ␉{␊ |
1104 | const struct devsw *dp = devsw;␊ |
1105 | ␉␉while(dp->name && bvr->biosdev >= dp->biosdev)␊ |
1106 | dp++;␊ |
1107 | ␊ |
1108 | ␉␉dp--;␊ |
1109 | ␉␉if (dp->name)␊ |
1110 | return sprintf(str, "%s(%d,%d)", dp->name, bvr->biosdev - dp->biosdev, bvr->part_no);␊ |
1111 | ␉}␊ |
1112 | ␉␊ |
1113 | ␉return 0;␊ |
1114 | }␊ |
1115 | |