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 "bootstruct.h"␊ |
65 | #include "platform.h"␊ |
66 | #include "disk.h"␊ |
67 | #include "modules.h"␊ |
68 | #include "xml.h"␊ |
69 | # include "md5.h"␊ |
70 | #include <uuid/uuid.h>␊ |
71 | #if 0 /* No OS X release has ever included this. */␊ |
72 | #include <Kernel/uuid/namespace.h>␊ |
73 | #else␊ |
74 | /* copied from uuid/namespace.h, just like BootX's fs.c does. */␊ |
75 | UUID_DEFINE( kFSUUIDNamespaceSHA1, 0xB3, 0xE2, 0x0F, 0x39, 0xF2, 0x92, 0x11, 0xD6, 0x97, 0xA4, 0x00, 0x30, 0x65, 0x43, 0xEC, 0xAC );␊ |
76 | #endif␊ |
77 | ␊ |
78 | #if UNUSED␊ |
79 | extern int multiboot_partition;␊ |
80 | extern int multiboot_partition_set;␊ |
81 | #endif␊ |
82 | ␊ |
83 | struct devsw {␊ |
84 | const char * name;␊ |
85 | // size increased from char to short to handle non-BIOS internal devices␊ |
86 | unsigned short biosdev;␊ |
87 | int type;␊ |
88 | };␊ |
89 | ␊ |
90 | // Device entries must be ordered by bios device numbers. ␊ |
91 | static struct devsw devsw[] =␊ |
92 | {␊ |
93 | { "hd", 0x80, kBIOSDevTypeHardDrive }, /* DEV_HD */␊ |
94 | { "en", 0xE0, kBIOSDevTypeNetwork }, /* DEV_EN */␊ |
95 | { "rd", 0x100, kBIOSDevTypeHardDrive },␊ |
96 | { "bt", 0x101, kBIOSDevTypeHardDrive }, // turbo - type for booter partition␊ |
97 | { 0, 0 }␊ |
98 | };␊ |
99 | ␊ |
100 | // Pseudo BIOS devices␊ |
101 | enum {␊ |
102 | ␉kPseudoBIOSDevRAMDisk = 0x100,␊ |
103 | ␉kPseudoBIOSDevBooter = 0x101␊ |
104 | };␊ |
105 | ␊ |
106 | /*␊ |
107 | * Max number of file descriptors.␊ |
108 | */␊ |
109 | #define NFILES 6␊ |
110 | ␊ |
111 | static struct iob iob[NFILES];␊ |
112 | ␊ |
113 | void * gFSLoadAddress = 0;␊ |
114 | ␊ |
115 | // Turbo - save what we think is our original BIOS boot volume if we have one 0xab␊ |
116 | BVRef gBIOSBootVolume = NULL;␊ |
117 | BVRef gBootVolume;␊ |
118 | ␊ |
119 | static BVRef newBootVolumeRef( int biosdev, int partno );␊ |
120 | static int GetFreeFd(void);␊ |
121 | static struct iob * iob_from_fdesc(int fdesc);␊ |
122 | ␊ |
123 | static int open_bvr(BVRef bvr, const char *filePath);␊ |
124 | ␊ |
125 | //==========================================================================␊ |
126 | // LoadVolumeFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
127 | // Load the specified file from the specified volume␊ |
128 | // to the load buffer at LOAD_ADDR.␊ |
129 | // If the file is fat, load only the i386 portion.␊ |
130 | ␊ |
131 | long LoadVolumeFile(BVRef bvr, const char *filePath)␊ |
132 | {␊ |
133 | long fileSize;␊ |
134 | ␉␊ |
135 | // Read file into load buffer. The data in the load buffer will be␊ |
136 | // overwritten by the next LoadFile() call.␊ |
137 | ␉␊ |
138 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
139 | ␉␊ |
140 | fileSize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
141 | ␉␊ |
142 | // Return the size of the file, or -1 if load failed.␊ |
143 | ␉␊ |
144 | return fileSize;␊ |
145 | }␊ |
146 | ␊ |
147 | //==========================================================================␊ |
148 | // LoadFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
149 | // Load the specified file to the load buffer at LOAD_ADDR.␊ |
150 | // If the file is fat, load only the i386 portion.␊ |
151 | ␊ |
152 | long LoadFile(const char * fileSpec)␊ |
153 | {␊ |
154 | const char * filePath;␊ |
155 | BVRef bvr;␊ |
156 | ␉␊ |
157 | // Resolve the boot volume from the file spec.␊ |
158 | ␉␊ |
159 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
160 | return -1;␊ |
161 | ␉␊ |
162 | return LoadVolumeFile(bvr, filePath);␊ |
163 | }␊ |
164 | ␊ |
165 | long ReadFileAtOffset(const char * fileSpec, void *buffer, uint64_t offset, uint64_t length)␊ |
166 | {␊ |
167 | const char *filePath;␊ |
168 | BVRef bvr;␊ |
169 | ␉␊ |
170 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
171 | return -1;␊ |
172 | ␉␊ |
173 | if (bvr->fs_readfile == NULL)␊ |
174 | return -1;␊ |
175 | ␉␊ |
176 | return bvr->fs_readfile(bvr, (char *)filePath, buffer, offset, length);␊ |
177 | }␊ |
178 | ␊ |
179 | long LoadThinFatFile(const char *fileSpec, void **binary)␊ |
180 | {␊ |
181 | const char *filePath;␊ |
182 | FSReadFile readFile;␊ |
183 | BVRef bvr;␊ |
184 | unsigned long length/*, length2*/; ␊ |
185 | ␉long length2;␊ |
186 | ␉␊ |
187 | // Resolve the boot volume from the file spec.␊ |
188 | ␉␊ |
189 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
190 | return -1;␊ |
191 | ␉␊ |
192 | *binary = (void *)kLoadAddr;␊ |
193 | ␉␊ |
194 | // Read file into load buffer. The data in the load buffer will be␊ |
195 | // overwritten by the next LoadFile() call.␊ |
196 | ␉␊ |
197 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
198 | ␉␊ |
199 | readFile = bvr->fs_readfile;␊ |
200 | ␉␊ |
201 | if (readFile != NULL) {␊ |
202 | // Read the first 4096 bytes (fat header)␊ |
203 | length = readFile(bvr, (char *)filePath, *binary, 0, 0x1000);␊ |
204 | if (length > 0) {␊ |
205 | if (ThinFatFile(binary, &length) == 0) {␊ |
206 | ␉␉␉␉if (length == 0)␊ |
207 | ␉␉␉␉␉return 0;␊ |
208 | // We found a fat binary; read only the thin part␊ |
209 | length = readFile(bvr, (char *)filePath,␊ |
210 | (void *)kLoadAddr, (unsigned long)(*binary) - kLoadAddr, length);␊ |
211 | *binary = (void *)kLoadAddr;␊ |
212 | } else {␊ |
213 | // Not a fat binary; read the rest of the file␊ |
214 | length2 = readFile(bvr, (char *)filePath, (void *)(kLoadAddr + length), length, 0);␊ |
215 | //if (length2 == -1) return -1;␊ |
216 | ␉␉␉␉if (length2 < 0) return -1;␊ |
217 | ␉␉␉␉␊ |
218 | length += (unsigned long)length2;␊ |
219 | }␊ |
220 | }␊ |
221 | } else {␊ |
222 | length = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
223 | if (length > 0) {␊ |
224 | ThinFatFile(binary, &length);␊ |
225 | }␊ |
226 | }␊ |
227 | ␉␊ |
228 | return length;␊ |
229 | }␊ |
230 | ␊ |
231 | // filesystem-specific getUUID functions call this shared string generator␊ |
232 | long CreateUUIDString(uint8_t uubytes[], int nbytes, char *uuidStr)␊ |
233 | {␊ |
234 | unsigned fmtbase, fmtidx, i;␊ |
235 | uint8_t uuidfmt[] = { 4, 2, 2, 2, 6 };␊ |
236 | char *p = uuidStr;␊ |
237 | MD5_CTX md5c;␊ |
238 | uint8_t mdresult[16];␊ |
239 | ␉␊ |
240 | bzero(mdresult, sizeof(mdresult));␊ |
241 | ␉␊ |
242 | // just like AppleFileSystemDriver␊ |
243 | MD5Init(&md5c);␊ |
244 | MD5Update(&md5c, kFSUUIDNamespaceSHA1, sizeof(kFSUUIDNamespaceSHA1));␊ |
245 | MD5Update(&md5c, uubytes, nbytes);␊ |
246 | MD5Final(mdresult, &md5c);␊ |
247 | ␉␊ |
248 | // this UUID has been made version 3 style (i.e. via namespace)␊ |
249 | // see "-uuid-urn-" IETF draft (which otherwise copies byte for byte)␊ |
250 | mdresult[6] = 0x30 | ( mdresult[6] & 0x0F );␊ |
251 | mdresult[8] = 0x80 | ( mdresult[8] & 0x3F );␊ |
252 | ␉␊ |
253 | ␉␊ |
254 | // generate the text: e.g. 5EB1869F-C4FA-3502-BDEB-3B8ED5D87292␊ |
255 | fmtbase = 0;␊ |
256 | for(fmtidx = 0; fmtidx < sizeof(uuidfmt); fmtidx++) {␊ |
257 | for(i=0; i < uuidfmt[fmtidx]; i++) {␊ |
258 | uint8_t byte = mdresult[fmtbase+i];␊ |
259 | char nib;␊ |
260 | ␉␉␉␊ |
261 | nib = byte >> 4;␊ |
262 | *p = nib + '0'; // 0x4 -> '4'␊ |
263 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
264 | p++;␊ |
265 | ␉␉␉␊ |
266 | nib = byte & 0xf;␊ |
267 | *p = nib + '0'; // 0x4 -> '4'␊ |
268 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
269 | p++;␊ |
270 | ␉␉␉␊ |
271 | }␊ |
272 | fmtbase += i;␊ |
273 | if(fmtidx < sizeof(uuidfmt)-1)␊ |
274 | *(p++) = '-';␊ |
275 | else␊ |
276 | *p = '\0';␊ |
277 | }␊ |
278 | ␉␊ |
279 | return 0;␊ |
280 | }␊ |
281 | ␊ |
282 | ␊ |
283 | //==========================================================================␊ |
284 | // GetDirEntry - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
285 | // Fetch the next directory entry for the given directory.␊ |
286 | ␊ |
287 | long GetDirEntry(const char * dirSpec, long long * dirIndex, const char ** name, ␊ |
288 | long * flags, long * time)␊ |
289 | {␊ |
290 | const char * dirPath;␊ |
291 | BVRef bvr;␊ |
292 | ␉␊ |
293 | // Resolve the boot volume from the dir spec.␊ |
294 | ␉␊ |
295 | if ((bvr = getBootVolumeRef(dirSpec, &dirPath)) == NULL)␊ |
296 | return -1;␊ |
297 | ␉␊ |
298 | // Return 0 on success, or -1 if there are no additional entries.␊ |
299 | ␉␊ |
300 | return bvr->fs_getdirentry( bvr,␊ |
301 | ␉␉␉␉␉␉␉ /* dirPath */ (char *)dirPath,␊ |
302 | ␉␉␉␉␉␉␉ /* dirIndex */ dirIndex,␊ |
303 | ␉␉␉␉␉␉␉ /* dirEntry */ (char **)name, flags, time, 0, 0 );␊ |
304 | }␊ |
305 | ␊ |
306 | //==========================================================================␊ |
307 | // GetFileInfo - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
308 | // Get attributes for the specified file.␊ |
309 | ␊ |
310 | static char* gMakeDirSpec;␊ |
311 | ␊ |
312 | long GetFileInfo(const char * dirSpec, const char * name,␊ |
313 | long * flags, long * time)␊ |
314 | {␊ |
315 | long long index = 0;␊ |
316 | const char * entryName;␊ |
317 | ␉␊ |
318 | if (gMakeDirSpec == 0)␊ |
319 | gMakeDirSpec = (char *)malloc(1024);␊ |
320 | ␉␊ |
321 | if (!dirSpec) {␊ |
322 | long idx, len;␊ |
323 | ␉␉␊ |
324 | len = strlen(name);␊ |
325 | ␉␉␊ |
326 | for (idx = len; idx && (name[idx] != '/' && name[idx] != '\\'); idx--) {}␊ |
327 | if (idx == 0) {␊ |
328 | gMakeDirSpec[0] = '/';␊ |
329 | gMakeDirSpec[1] = '\0';␊ |
330 | } else {␊ |
331 | idx++;␊ |
332 | strncpy(gMakeDirSpec, name, idx);␊ |
333 | name += idx;␊ |
334 | }␊ |
335 | dirSpec = gMakeDirSpec;␊ |
336 | }␊ |
337 | ␉␊ |
338 | while (GetDirEntry(dirSpec, &index, &entryName, flags, time) == 0)␊ |
339 | {␊ |
340 | if (strcmp(entryName, name) == 0)␊ |
341 | return 0; // success␊ |
342 | }␊ |
343 | return -1; // file not found␊ |
344 | }␊ |
345 | ␊ |
346 | //==========================================================================␊ |
347 | // GetFreeFD()␊ |
348 | ␊ |
349 | static int GetFreeFd(void)␊ |
350 | {␊ |
351 | ␉int␉fd;␊ |
352 | ␉␊ |
353 | ␉// Locate a free descriptor slot.␊ |
354 | ␉for (fd = 0; fd < NFILES; fd++) {␊ |
355 | ␉␉if (iob[fd].i_flgs == 0) {␊ |
356 | ␉␉␉return fd;␊ |
357 | ␉␉}␊ |
358 | ␉}␊ |
359 | ␉stop("Out of file descriptors");␊ |
360 | ␉// not reached␊ |
361 | ␉return -1;␊ |
362 | }␊ |
363 | ␊ |
364 | //==========================================================================␊ |
365 | // iob_from_fdesc()␊ |
366 | //␊ |
367 | // Return a pointer to an allocated 'iob' based on the file descriptor␊ |
368 | // provided. Returns NULL if the file descriptor given is invalid.␊ |
369 | ␊ |
370 | static struct iob * iob_from_fdesc(int fdesc)␊ |
371 | {␊ |
372 | register struct iob * io;␊ |
373 | ␉␊ |
374 | if (fdesc < 0 || fdesc >= NFILES ||␊ |
375 | ((io = &iob[fdesc])->i_flgs & F_ALLOC) == 0)␊ |
376 | return NULL;␊ |
377 | else␊ |
378 | return io;␊ |
379 | }␊ |
380 | ␊ |
381 | //==========================================================================␊ |
382 | // open() - Open the file specified by 'path' for reading.␊ |
383 | ␊ |
384 | static int open_bvr(BVRef bvr, const char *filePath)␊ |
385 | {␊ |
386 | ␉struct iob␉*io;␊ |
387 | ␉int␉␉fdesc;␊ |
388 | ␉int␉␉i;␊ |
389 | ␉␊ |
390 | ␉if (bvr == NULL) {␊ |
391 | ␉␉return -1;␊ |
392 | ␉}␊ |
393 | ␉␊ |
394 | ␉fdesc = GetFreeFd();␊ |
395 | ␉io = &iob[fdesc];␊ |
396 | ␉bzero(io, sizeof(*io));␊ |
397 | ␉␊ |
398 | ␉// Mark the descriptor as taken.␊ |
399 | ␉io->i_flgs = F_ALLOC;␊ |
400 | ␉␊ |
401 | ␉// Find the next available memory block in the download buffer.␊ |
402 | ␉io->i_buf = (char *) LOAD_ADDR;␊ |
403 | ␉for (i = 0; i < NFILES; i++) {␊ |
404 | ␉␉if ((iob[i].i_flgs != F_ALLOC) || (i == fdesc)) {␊ |
405 | ␉␉␉continue;␊ |
406 | ␉␉}␊ |
407 | ␉␉io->i_buf = max(iob[i].i_filesize + iob[i].i_buf, io->i_buf);␊ |
408 | ␉}␊ |
409 | ␉␊ |
410 | ␉// Load entire file into memory. Unnecessary open() calls must be avoided.␊ |
411 | ␉gFSLoadAddress = io->i_buf;␊ |
412 | ␉io->i_filesize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
413 | ␉if (io->i_filesize < 0) {␊ |
414 | ␉␉close(fdesc);␊ |
415 | ␉␉return -1;␊ |
416 | ␉}␊ |
417 | ␉return fdesc;␊ |
418 | }␊ |
419 | ␊ |
420 | ␊ |
421 | int open(const char *path)␊ |
422 | {␊ |
423 | ␉const char␉*filepath;␊ |
424 | ␉BVRef␉␉bvr;␊ |
425 | ␉␊ |
426 | ␉// Resolve the boot volume from the file spec.␊ |
427 | ␉if ((bvr = getBootVolumeRef(path, &filepath)) != NULL) {␊ |
428 | ␊ |
429 | return open_bvr(bvr, filepath);␊ |
430 | ␉}␊ |
431 | ␉return -1;␊ |
432 | }␊ |
433 | ␊ |
434 | ␊ |
435 | int open_bvdev(const char *bvd, const char *path)␊ |
436 | {␊ |
437 | ␉const struct devsw␉*dp;␊ |
438 | ␉const char␉␉*cp;␊ |
439 | ␉BVRef␉␉␉bvr;␊ |
440 | ␉int␉␉␉i;␊ |
441 | ␉int␉␉␉len;␊ |
442 | ␉int␉␉␉unit;␊ |
443 | ␉int␉␉␉partition;␊ |
444 | ␉␊ |
445 | ␉if ((i = open(path)) >= 0) {␊ |
446 | ␉␉return i;␊ |
447 | ␉}␊ |
448 | ␉␊ |
449 | ␉if (bvd == NULL || (len = strlen(bvd)) < 2) {␊ |
450 | ␉␉return -1;␊ |
451 | ␉}␊ |
452 | ␉␊ |
453 | ␉for (dp=devsw; dp->name; dp++) {␊ |
454 | ␉␉if (bvd[0] == dp->name[0] && bvd[1] == dp->name[1]) {␊ |
455 | ␉␉␉unit = 0;␊ |
456 | ␉␉␉partition = 0;␊ |
457 | ␉␉␉/* get optional unit and partition */␊ |
458 | ␉␉␉if (len >= 5 && bvd[2] == '(') { /* min must be present xx(0) */␊ |
459 | ␉␉␉␉cp = &bvd[3];␊ |
460 | ␉␉␉␉i = 0;␊ |
461 | ␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
462 | ␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
463 | ␉␉␉␉␉unit = i;␊ |
464 | ␉␉␉␉}␊ |
465 | ␉␉␉␉if (*cp++ == ',') {␊ |
466 | ␉␉␉␉␉i = 0;␊ |
467 | ␉␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
468 | ␉␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
469 | ␉␉␉␉␉␉partition = i;␊ |
470 | ␉␉␉␉␉}␊ |
471 | ␉␉␉␉}␊ |
472 | ␉␉␉}␊ |
473 | ␉␉␉bvr = newBootVolumeRef(dp->biosdev + unit, partition);␊ |
474 | ␊ |
475 | return open_bvr(bvr, path);␊ |
476 | ␉␉}␊ |
477 | ␉}␊ |
478 | ␉return -1;␊ |
479 | }␊ |
480 | ␊ |
481 | //==========================================================================␊ |
482 | // close() - Close a file descriptor.␊ |
483 | ␊ |
484 | int close(int fdesc)␊ |
485 | {␊ |
486 | struct iob * io;␊ |
487 | ␉␊ |
488 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
489 | return (-1);␊ |
490 | ␉␊ |
491 | io->i_flgs = 0;␊ |
492 | ␉␊ |
493 | return 0;␊ |
494 | }␊ |
495 | ␊ |
496 | //==========================================================================␊ |
497 | // read() - Read up to 'count' bytes of data from the file descriptor␊ |
498 | // into the buffer pointed to by buf.␊ |
499 | ␊ |
500 | int read(int fdesc, char * buf, int count)␊ |
501 | {␊ |
502 | struct iob * io;␊ |
503 | ␊ |
504 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
505 | return (-1);␊ |
506 | ␉␊ |
507 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
508 | count = io->i_filesize - io->i_offset;␊ |
509 | ␉␊ |
510 | if (count <= 0)␊ |
511 | return 0; // end of file␊ |
512 | ␉␊ |
513 | bcopy(io->i_buf + io->i_offset, buf, count);␊ |
514 | ␉␊ |
515 | io->i_offset += count;␊ |
516 | ␉␊ |
517 | return count;␊ |
518 | }␊ |
519 | ␊ |
520 | //==========================================================================␊ |
521 | // file_size() - Returns the size of the file described by the file␊ |
522 | // descriptor.␊ |
523 | ␊ |
524 | int file_size(int fdesc)␊ |
525 | {␊ |
526 | struct iob * io;␊ |
527 | ␉␊ |
528 | if ((io = iob_from_fdesc(fdesc)) == 0)␊ |
529 | return 0;␊ |
530 | ␉␊ |
531 | return io->i_filesize;␊ |
532 | }␊ |
533 | ␊ |
534 | //==========================================================================␊ |
535 | ␊ |
536 | struct dirstuff * opendir(const char * path)␊ |
537 | {␊ |
538 | struct dirstuff * dirp = 0;␊ |
539 | const char * dirPath;␊ |
540 | BVRef bvr;␊ |
541 | ␉␊ |
542 | if ((bvr = getBootVolumeRef(path, &dirPath)) == NULL)␊ |
543 | goto error;␊ |
544 | ␉␊ |
545 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
546 | if (dirp == NULL)␊ |
547 | goto error;␊ |
548 | ␉␊ |
549 | dirp->dir_path = newString(dirPath);␊ |
550 | if (dirp->dir_path == NULL)␊ |
551 | goto error;␊ |
552 | ␉␊ |
553 | dirp->dir_bvr = bvr;␊ |
554 | ␉␊ |
555 | return dirp;␊ |
556 | ␉␊ |
557 | error:␊ |
558 | closedir(dirp);␊ |
559 | return NULL;␊ |
560 | }␊ |
561 | ␊ |
562 | //==========================================================================␊ |
563 | ␊ |
564 | int closedir(struct dirstuff * dirp)␊ |
565 | {␊ |
566 | if (dirp) {␊ |
567 | if (dirp->dir_path) free(dirp->dir_path);␊ |
568 | free(dirp);␊ |
569 | }␊ |
570 | return 0;␊ |
571 | }␊ |
572 | ␊ |
573 | //==========================================================================␊ |
574 | ␊ |
575 | int readdir(struct dirstuff * dirp, const char ** name, long * flags,␊ |
576 | long * time)␊ |
577 | {␊ |
578 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
579 | ␉␉␉␉␉␉␉␉␉␉ /* dirPath */ dirp->dir_path,␊ |
580 | ␉␉␉␉␉␉␉␉␉␉ /* dirIndex */ &dirp->dir_index,␊ |
581 | ␉␉␉␉␉␉␉␉␉␉ /* dirEntry */ (char **)name, flags, time,␊ |
582 | ␉␉␉␉␉␉␉␉␉␉ 0, 0);␊ |
583 | }␊ |
584 | ␊ |
585 | #if UNUSED␊ |
586 | long GetFSUUID(char *spec, char *uuidStr)␊ |
587 | {␊ |
588 | BVRef bvr;␊ |
589 | long rval = -1;␊ |
590 | const char *devSpec;␊ |
591 | ␉␊ |
592 | if ((bvr = getBootVolumeRef(spec, &devSpec)) == NULL)␊ |
593 | return -1;␊ |
594 | ␉␊ |
595 | if(bvr->fs_getuuid)␊ |
596 | rval = bvr->fs_getuuid(bvr, uuidStr);␊ |
597 | ␉␊ |
598 | return rval;␊ |
599 | }␊ |
600 | ␊ |
601 | long GetFileBlock(const char *fileSpec, unsigned long long *firstBlock)␊ |
602 | {␊ |
603 | const char * filePath;␊ |
604 | BVRef bvr;␊ |
605 | ␉␊ |
606 | // Resolve the boot volume from the file spec.␊ |
607 | ␉␊ |
608 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL) {␊ |
609 | printf("Boot volume for '%s' is bogus\n", fileSpec);␊ |
610 | return -1;␊ |
611 | }␊ |
612 | ␉␊ |
613 | return bvr->fs_getfileblock(bvr, (char *)filePath, firstBlock);␊ |
614 | }␊ |
615 | ␊ |
616 | //==========================================================================␊ |
617 | // openmem()␊ |
618 | ␊ |
619 | int openmem(char * buf, int len)␊ |
620 | {␊ |
621 | int fdesc;␊ |
622 | struct iob * io;␊ |
623 | ␉␊ |
624 | fdesc = GetFreeFd();␊ |
625 | io = &iob[fdesc];␊ |
626 | bzero(io, sizeof(*io));␊ |
627 | ␉␊ |
628 | // Mark the descriptor as taken. Set the F_MEM flag to indicate␊ |
629 | // that the file buffer is provided by the caller.␊ |
630 | ␉␊ |
631 | io->i_flgs = F_ALLOC | F_MEM;␊ |
632 | io->i_buf = buf;␊ |
633 | io->i_filesize = len;␊ |
634 | ␉␊ |
635 | return fdesc;␊ |
636 | }␊ |
637 | ␊ |
638 | #endif␊ |
639 | //==========================================================================␊ |
640 | // lseek() - Reposition the byte offset of the file descriptor from the␊ |
641 | // beginning of the file. Returns the relocated offset.␊ |
642 | ␊ |
643 | int b_lseek(int fdesc, int offset, int ptr)␊ |
644 | {␊ |
645 | struct iob * io;␊ |
646 | ␉␊ |
647 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
648 | return (-1);␊ |
649 | ␉␊ |
650 | io->i_offset = offset;␊ |
651 | ␉␊ |
652 | return offset;␊ |
653 | }␊ |
654 | #if UNUSED␊ |
655 | //==========================================================================␊ |
656 | // tell() - Returns the byte offset of the file descriptor.␊ |
657 | ␊ |
658 | int tell(int fdesc)␊ |
659 | {␊ |
660 | struct iob * io;␊ |
661 | ␉␊ |
662 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
663 | return 0;␊ |
664 | ␉␊ |
665 | return io->i_offset;␊ |
666 | }␊ |
667 | #endif␊ |
668 | //==========================================================================␊ |
669 | // write() - Write up to 'count' bytes of data to the file descriptor␊ |
670 | // from the buffer pointed to by buf.␊ |
671 | ␊ |
672 | int write(int fdesc, const char * buf, int count)␊ |
673 | {␊ |
674 | struct iob * io;␊ |
675 | ␊ |
676 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
677 | return (-1);␊ |
678 | ␉␊ |
679 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
680 | count = io->i_filesize - io->i_offset;␊ |
681 | ␉␊ |
682 | if (count <= 0)␊ |
683 | return 0; // end of file␊ |
684 | ␉␊ |
685 | bcopy(buf, io->i_buf + io->i_offset, count);␊ |
686 | ␉␊ |
687 | io->i_offset += count;␊ |
688 | ␉␊ |
689 | return count;␊ |
690 | }␊ |
691 | #if UNUSED␊ |
692 | ␊ |
693 | int writebyte(int fdesc, char value)␊ |
694 | {␊ |
695 | struct iob * io;␊ |
696 | ␊ |
697 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
698 | return (-1);␊ |
699 | ␉␊ |
700 | if ((io->i_offset + 1) > (unsigned int)io->i_filesize)␊ |
701 | return 0; // end of file␊ |
702 | ␉␊ |
703 | io->i_buf[io->i_offset++] = value;␊ |
704 | ␉␊ |
705 | return 1;␊ |
706 | }␊ |
707 | ␊ |
708 | int writeint(int fdesc, int value)␊ |
709 | {␊ |
710 | struct iob * io;␊ |
711 | ␊ |
712 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
713 | return (-1);␊ |
714 | ␉␊ |
715 | if ((io->i_offset + 4) > (unsigned int)io->i_filesize)␊ |
716 | return 0; // end of file␊ |
717 | ␉␊ |
718 | bcopy(&value, io->i_buf + io->i_offset, 4);␊ |
719 | ␉␊ |
720 | io->i_offset += 4;␊ |
721 | ␉␊ |
722 | return 4;␊ |
723 | }␊ |
724 | //==========================================================================␊ |
725 | ␊ |
726 | struct dirstuff * vol_opendir(BVRef bvr, const char * path)␊ |
727 | {␊ |
728 | struct dirstuff * dirp = 0;␊ |
729 | ␉␊ |
730 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
731 | if (dirp == NULL)␊ |
732 | goto error;␊ |
733 | ␉␊ |
734 | dirp->dir_path = newString(path);␊ |
735 | if (dirp->dir_path == NULL)␊ |
736 | goto error;␊ |
737 | ␉␊ |
738 | dirp->dir_bvr = bvr;␊ |
739 | ␉␊ |
740 | return dirp;␊ |
741 | ␉␊ |
742 | error:␊ |
743 | closedir(dirp);␊ |
744 | return NULL;␊ |
745 | }␊ |
746 | ␊ |
747 | //==========================================================================␊ |
748 | ␊ |
749 | int readdir_ext(struct dirstuff * dirp, const char ** name, long * flags,␊ |
750 | ␉␉␉␉long * time, FinderInfo *finderInfo, long *infoValid)␊ |
751 | {␊ |
752 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
753 | ␉␉␉␉␉␉␉␉␉␉ /* dirPath */ dirp->dir_path,␊ |
754 | ␉␉␉␉␉␉␉␉␉␉ /* dirIndex */ &dirp->dir_index,␊ |
755 | ␉␉␉␉␉␉␉␉␉␉ /* dirEntry */ (char **)name,␊ |
756 | ␉␉␉␉␉␉␉␉␉␉ flags, time,␊ |
757 | ␉␉␉␉␉␉␉␉␉␉ finderInfo, infoValid);␊ |
758 | }␊ |
759 | //==========================================================================␊ |
760 | ␊ |
761 | const char * systemConfigDir()␊ |
762 | {␊ |
763 | if (gBootFileType == kNetworkDeviceType)␊ |
764 | ␉␉return "";␊ |
765 | return "/Library/Preferences/SystemConfiguration";␊ |
766 | }␊ |
767 | ␊ |
768 | #endif␊ |
769 | ␊ |
770 | //==========================================================================␊ |
771 | ␊ |
772 | int gBootFileType;␊ |
773 | ␊ |
774 | void scanBootVolumes( int biosdev, int * count )␊ |
775 | {␊ |
776 | ␉BVRef bvr = 0;␊ |
777 | ␉␊ |
778 | ␉bvr = diskScanBootVolumes(biosdev, count);␊ |
779 | ␉if (bvr == NULL)␊ |
780 | ␉{␊ |
781 | #ifdef NBP_SUPPORT␊ |
782 | ␉␉bvr = nbpScanBootVolumes(biosdev, count);␊ |
783 | ␉␉if (bvr != NULL)␊ |
784 | ␉␉{␊ |
785 | ␉␉␉gBootFileType = kNetworkDeviceType;␊ |
786 | ␉␉}␊ |
787 | #endif␊ |
788 | ␉}␊ |
789 | ␉else␊ |
790 | ␉{␊ |
791 | ␉␉gBootFileType = kBlockDeviceType;␊ |
792 | ␉}␊ |
793 | }␊ |
794 | ␊ |
795 | //==========================================================================␊ |
796 | ␊ |
797 | void scanDisks(void)␊ |
798 | {␊ |
799 | #define MAX_HDD_COUNT 32␊ |
800 | ␉int bvCount;␊ |
801 | ␉int hd = 0;␊ |
802 | ␉␊ |
803 | ␉// Testing up to MAX_HDD_COUNT hard drives.␊ |
804 | ␉while(!testBiosread(0x80 + hd, 0) && hd < MAX_HDD_COUNT)␊ |
805 | ␉{␊ |
806 | ␉␉bvCount = 0;␊ |
807 | ␉␉scanBootVolumes(0x80 + hd, &bvCount);␊ |
808 | ␉␉hd++;␊ |
809 | ␉}␊ |
810 | ␉int gBIOSDev = (int)get_env(envgBIOSDev);␊ |
811 | ␉// Also scanning CD/DVD drive.␊ |
812 | ␉if (biosDevIsCDROM(gBIOSDev))␊ |
813 | ␉{␊ |
814 | ␉␉bvCount = 0;␊ |
815 | ␉␉scanBootVolumes(gBIOSDev, &bvCount);␊ |
816 | ␉}␊ |
817 | }␊ |
818 | ␊ |
819 | //==========================================================================␊ |
820 | ␊ |
821 | BVRef selectBootVolume( BVRef chain )␊ |
822 | {␊ |
823 | ␉bool filteredChain = false;␊ |
824 | ␉bool foundPrimary = false;␊ |
825 | ␉BVRef bvr, bvr1 = 0, bvr2 = 0;␊ |
826 | ␉␊ |
827 | ␉if (chain->filtered) filteredChain = true;␊ |
828 | ␉␊ |
829 | ␉int gBIOSDev = (int)get_env(envgBIOSDev);␊ |
830 | ␊ |
831 | #if UNUSED␊ |
832 | ␉if (multiboot_partition_set)␊ |
833 | ␉␉for (bvr = chain; bvr < (BVRef)ULONG_MAX; bvr = bvr->next) {␊ |
834 | if (!bvr) {␊ |
835 | break;␊ |
836 | }␊ |
837 | ␉␉␉if ( bvr->part_no == multiboot_partition && bvr->biosdev == gBIOSDev ) ␊ |
838 | ␉␉␉␉return bvr;␊ |
839 | }␊ |
840 | #endif␊ |
841 | ␉/*␊ |
842 | ␉ * Checking "Default Partition" key in system configuration - use format: hd(x,y), the volume UUID or label -␊ |
843 | ␉ * to override the default selection.␊ |
844 | ␉ * We accept only kBVFlagSystemVolume or kBVFlagForeignBoot volumes.␊ |
845 | ␉ */␊ |
846 | ␉char *val = XMLDecode(getStringForKey(kDefaultPartition, DEFAULT_BOOT_CONFIG));␊ |
847 | if (val) {␊ |
848 | for (bvr = chain; bvr < (BVRef)ULONG_MAX; bvr = bvr->next) ␊ |
849 | {␊ |
850 | if (!bvr) {␊ |
851 | break;␊ |
852 | }␊ |
853 | if (matchVolumeToString(bvr, val, false)) {␊ |
854 | free(val);␊ |
855 | return bvr;␊ |
856 | }␊ |
857 | }␊ |
858 | free(val);␊ |
859 | }␊ |
860 | ␉␊ |
861 | ␉/*␊ |
862 | ␉ * Scannig the volume chain backwards and trying to find ␊ |
863 | ␉ * a HFS+ volume with valid boot record signature.␊ |
864 | ␉ * If not found any active partition then we will␊ |
865 | ␉ * select this volume as the boot volume.␊ |
866 | ␉ */␊ |
867 | ␉␊ |
868 | ␉{ ␊ |
869 | for (bvr = chain; bvr < (BVRef)ULONG_MAX; bvr = bvr->next)␊ |
870 | {␊ |
871 | if (!bvr) {␊ |
872 | break;␊ |
873 | }␊ |
874 | #if UNUSED␊ |
875 | ␉␉␉if (multiboot_skip_partition_set) {␊ |
876 | ␉␉␉␉if (bvr->part_no == multiboot_skip_partition) continue;␊ |
877 | ␉␉␉}␊ |
878 | #endif␊ |
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 | ␉␉␉{␊ |
887 | ␉␉␉␉bvr2 = bvr;␉␉␉␉␊ |
888 | ␉␉␉}␊ |
889 | ␊ |
890 | ␉␉␉// zhell -- if gBIOSBootVolume is NOT set, we use the "if" statement␊ |
891 | ␉␉␉// from r491,␊ |
892 | ␉␉␉if ( bvr->flags & kBVFlagBootable␊ |
893 | ␉␉␉␉&& ! gBIOSBootVolume␊ |
894 | ␉␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
895 | ␉␉␉{␊ |
896 | ␉␉␉␉bvr2 = bvr;␉␉␉␉␊ |
897 | ␉␉␉}␊ |
898 | }␊ |
899 | ␉}␊ |
900 | ␊ |
901 | ␉/*␊ |
902 | ␉ * Use the standrad method for selecting the boot volume.␊ |
903 | ␉ */␊ |
904 | ␉if (foundPrimary)␊ |
905 | ␉{␊ |
906 | ␉␉for (bvr = chain; bvr < (BVRef)ULONG_MAX; bvr = bvr->next)␊ |
907 | {␊ |
908 | if (!bvr) {␊ |
909 | break;␊ |
910 | }␊ |
911 | ␉␉␉if ( bvr->flags & kBVFlagNativeBoot && bvr->biosdev == gBIOSDev ) bvr1 = bvr;␊ |
912 | ␉␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) bvr2 = bvr;␊ |
913 | ␉␉}␊ |
914 | ␉}␊ |
915 | ␉␊ |
916 | ␉bvr = bvr2 ? bvr2 :␊ |
917 | ␉bvr1 ? bvr1 : chain;␊ |
918 | ␉␊ |
919 | ␉return bvr;␊ |
920 | }␊ |
921 | ␊ |
922 | //==========================================================================␊ |
923 | ␊ |
924 | #define LP '('␊ |
925 | #define RP ')'␊ |
926 | ␊ |
927 | /*!␊ |
928 | This is like boot2's gBootVolume except it is for the internal use of␊ |
929 | libsaio to track which volume an unqualified path should be relative to.␊ |
930 | This replaces bootInfo->kernDev as the carrier of this information.␊ |
931 | */␊ |
932 | static BVRef gRootVolume;␊ |
933 | ␊ |
934 | void setRootVolume(BVRef volume)␊ |
935 | {␊ |
936 | gRootVolume = volume;␊ |
937 | // Veto non-native FS. Basically that means don't allow the root volume to␊ |
938 | // be set to a volume we can't read files from.␊ |
939 | if(gRootVolume != NULL && ((gRootVolume->flags & kBVFlagNativeBoot) == 0))␊ |
940 | gRootVolume = NULL;␊ |
941 | }␊ |
942 | ␊ |
943 | void setBootGlobals(BVRef chain)␊ |
944 | {␊ |
945 | ␉// Record default boot device.␊ |
946 | ␉gBootVolume = selectBootVolume(chain);␊ |
947 | ␉␊ |
948 | ␉// turbo - Save the ORIGINAL boot volume too for loading our mkext␊ |
949 | ␉if (!gBIOSBootVolume) gBIOSBootVolume = gBootVolume;␊ |
950 | ␉␊ |
951 | ␉setRootVolume(gBootVolume);␉␊ |
952 | }␊ |
953 | ␊ |
954 | /*!␊ |
955 | Extracts the volume selector from the pathname, returns the selected␊ |
956 | BVRef, and sets *outPath to the remainder of the path.␊ |
957 | If the path did not include a volume selector then the current volume␊ |
958 | is used. When called with a volume selector the current volume␊ |
959 | is changed to the selected volume unless the volume selector is␊ |
960 | that of a ramdisk.␊ |
961 | */␊ |
962 | BVRef getBootVolumeRef( const char * path, const char ** outPath )␊ |
963 | {␊ |
964 | const char * cp;␊ |
965 | BVRef bvr = gRootVolume;␊ |
966 | //int biosdev = (int)get_env(envgBIOSDev);␊ |
967 | ␉␊ |
968 | // Search for left parenthesis in the path specification.␊ |
969 | ␉␊ |
970 | for (cp = path; *cp; cp++) {␊ |
971 | if (*cp == LP || *cp == '/') break;␊ |
972 | }␊ |
973 | ␉␊ |
974 | if (*cp != LP) // no left paren found␊ |
975 | {␊ |
976 | // Path is using the implicit current device so if there is␊ |
977 | // no current device, then we must fail.␊ |
978 | cp = path;␊ |
979 | if ( gRootVolume == NULL )␊ |
980 | return NULL;␊ |
981 | }␊ |
982 | else if ((cp - path) == 2) // found "xx("␊ |
983 | {␊ |
984 | const struct devsw * dp;␊ |
985 | const char * xp = path;␊ |
986 | int i;␊ |
987 | int unit = -1;␊ |
988 | int part = -1;␊ |
989 | ␉␉␊ |
990 | cp++;␊ |
991 | ␉␉␊ |
992 | // Check the 2 character device name pointed by 'xp'.␊ |
993 | ␉␉␊ |
994 | for (dp = devsw; dp->name; dp++)␊ |
995 | {␊ |
996 | if ((xp[0] == dp->name[0]) && (xp[1] == dp->name[1]))␊ |
997 | break; // found matching entry␊ |
998 | }␊ |
999 | if (dp->name == NULL)␊ |
1000 | {␊ |
1001 | error("Unknown device '%c%c'\n", xp[0], xp[1]);␊ |
1002 | return NULL;␊ |
1003 | }␊ |
1004 | ␊ |
1005 | // Extract the optional unit number from the specification.␊ |
1006 | // hd(unit) or hd(unit, part).␊ |
1007 | ␉␉␊ |
1008 | i = 0;␊ |
1009 | while (*cp >= '0' && *cp <= '9')␊ |
1010 | {␊ |
1011 | i = i * 10 + *cp++ - '0';␊ |
1012 | unit = i;␊ |
1013 | }␊ |
1014 | ␉␉␊ |
1015 | // Unit is no longer optional and never really was.␊ |
1016 | // If the user failed to specify it then the unit number from the previous kernDev␊ |
1017 | // would have been used which makes little sense anyway.␊ |
1018 | // For example, if the user did fd()/foobar and the current root device was the␊ |
1019 | // second hard disk (i.e. unit 1) then fd() would select the second floppy drive!␊ |
1020 | if(unit == -1)␊ |
1021 | return NULL;␊ |
1022 | ␉␉␊ |
1023 | // Extract the optional partition number from the specification.␊ |
1024 | ␉␉␊ |
1025 | if (*cp == ',')␊ |
1026 | part = atoi(++cp);␊ |
1027 | ␉␉␊ |
1028 | // If part is not specified part will be -1 whereas before it would have been␊ |
1029 | // whatever the last partition was which makes about zero sense if the device␊ |
1030 | // has been switched.␊ |
1031 | ␉␉␊ |
1032 | // Skip past the right paren.␊ |
1033 | ␉␉␊ |
1034 | for ( ; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1035 | if (*cp == RP) cp++;␊ |
1036 | ␊ |
1037 | int biosdev = dp->biosdev + unit;␊ |
1038 | bvr = newBootVolumeRef(biosdev, part);␊ |
1039 | ␉␉␊ |
1040 | if(bvr == NULL)␊ |
1041 | return NULL;␊ |
1042 | }␊ |
1043 | else␊ |
1044 | {␊ |
1045 | // Bad device specifier, skip past the right paren.␊ |
1046 | ␉␉␊ |
1047 | for ( cp++; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1048 | if (*cp == RP) cp++;␊ |
1049 | // If gRootVolume was NULL, then bvr will be NULL as well which␊ |
1050 | // should be caught by the caller.␊ |
1051 | }␊ |
1052 | ␉␊ |
1053 | // Returns the file path following the device spec.␊ |
1054 | // e.g. 'hd(1,b)mach_kernel' is reduced to 'mach_kernel'.␊ |
1055 | ␉␊ |
1056 | *outPath = cp;␊ |
1057 | ␉␊ |
1058 | return bvr;␊ |
1059 | }␊ |
1060 | ␊ |
1061 | //==========================================================================␊ |
1062 | // Function name is a misnomer as scanBootVolumes usually calls diskScanBootVolumes␊ |
1063 | // which caches the information. So it's only allocated on the first run.␊ |
1064 | static BVRef newBootVolumeRef( int biosdev, int partno )␊ |
1065 | {␊ |
1066 | ␉BVRef bvr, bvr1, bvrChain;␊ |
1067 | ␉␊ |
1068 | ␉bvr = bvr1 = NULL;␊ |
1069 | ␉␊ |
1070 | // Try resolving "rd" and "bt" devices first.␊ |
1071 | ␉execute_hook("newRamDisk_BVR", &biosdev, &bvr1, NULL, NULL, NULL, NULL);␊ |
1072 | ␉␊ |
1073 | // Try resolving "rd" and "bt" devices first.␊ |
1074 | ␉␊ |
1075 | ␉if (biosdev == kPseudoBIOSDevBooter)␊ |
1076 | ␉{␊ |
1077 | ␉␉if (bvr1 == NULL )␊ |
1078 | ␉␉␉bvr1 = gBIOSBootVolume;␊ |
1079 | ␉}␊ |
1080 | ␉else␊ |
1081 | ␉{␊ |
1082 | ␉␉// Fetch the volume list from the device.␊ |
1083 | ␉␉␊ |
1084 | ␉␉scanBootVolumes( biosdev, NULL );␊ |
1085 | ␉␉bvrChain = getBVChainForBIOSDev(biosdev);␊ |
1086 | ␉␉␊ |
1087 | ␉␉// Look for a perfect match based on device and partition number.␊ |
1088 | ␉␉␊ |
1089 | ␉␉for ( bvr1 = NULL, bvr = bvrChain; bvr; bvr = bvr->next )␊ |
1090 | ␉␉{␊ |
1091 | ␉␉␉if ( ( bvr->flags & kBVFlagNativeBoot ) == 0 ) continue;␊ |
1092 | ␉␉␉␊ |
1093 | ␉␉␉bvr1 = bvr;␊ |
1094 | ␉␉␉if ( bvr->part_no == partno ) break;␊ |
1095 | ␉␉}␊ |
1096 | ␉}␊ |
1097 | ␉␊ |
1098 | ␉return bvr ? bvr : bvr1;␊ |
1099 | }␊ |
1100 | ␊ |
1101 | //==========================================================================␊ |
1102 | // getDeviceDescription() - Extracts unit number and partition number␊ |
1103 | // from bvr structure into "dw(u,p)" format.␊ |
1104 | // Returns length of the out string␊ |
1105 | int getDeviceDescription(BVRef bvr, char *str)␊ |
1106 | {␊ |
1107 | if(!str)␊ |
1108 | return 0;␊ |
1109 | ␊ |
1110 | ␉*str = '\0';␊ |
1111 | ␉␊ |
1112 | ␉if (bvr)␊ |
1113 | ␉{␊ |
1114 | const struct devsw *dp = devsw;␊ |
1115 | ␉␉while(dp->name && bvr->biosdev >= dp->biosdev)␊ |
1116 | dp++;␊ |
1117 | ␊ |
1118 | ␉␉dp--;␊ |
1119 | ␉␉if (dp->name)␊ |
1120 | return sprintf(str, "%s(%d,%d)", dp->name, bvr->biosdev - dp->biosdev, bvr->part_no);␊ |
1121 | ␉}␊ |
1122 | ␉␊ |
1123 | ␉return 0;␊ |
1124 | }␊ |
1125 | |