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 | static BVRef newBootVolumeRef( int biosdev, int partno );␊ |
114 | static int GetFreeFd(void);␊ |
115 | ␊ |
116 | static int open_bvr(BVRef bvr, const char *filePath);␊ |
117 | ␊ |
118 | //==========================================================================␊ |
119 | // LoadVolumeFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
120 | // Load the specified file from the specified volume␊ |
121 | // to the load buffer at LOAD_ADDR.␊ |
122 | // If the file is fat, load only the i386 portion.␊ |
123 | ␊ |
124 | long LoadVolumeFile(BVRef bvr, const char *filePath)␊ |
125 | {␊ |
126 | long fileSize;␊ |
127 | ␉␊ |
128 | // Read file into load buffer. The data in the load buffer will be␊ |
129 | // overwritten by the next LoadFile() call.␊ |
130 | ␉␊ |
131 | ␉safe_set_env(envgFSLoadAddress, (uint32_t)(void *)LOAD_ADDR);␊ |
132 | ␊ |
133 | fileSize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
134 | ␉␊ |
135 | // Return the size of the file, or -1 if load failed.␊ |
136 | ␉␊ |
137 | return fileSize;␊ |
138 | }␊ |
139 | ␊ |
140 | //==========================================================================␊ |
141 | // LoadFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
142 | // Load the specified file to the load buffer at LOAD_ADDR.␊ |
143 | // If the file is fat, load only the i386 portion.␊ |
144 | ␊ |
145 | long LoadFile(const char * fileSpec)␊ |
146 | {␊ |
147 | const char * filePath;␊ |
148 | BVRef bvr;␊ |
149 | ␉␊ |
150 | // Resolve the boot volume from the file spec.␊ |
151 | ␉␊ |
152 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
153 | return -1;␊ |
154 | ␉␊ |
155 | return LoadVolumeFile(bvr, filePath);␊ |
156 | }␊ |
157 | ␊ |
158 | #if UNUSED␊ |
159 | long ReadFileAtOffset(const char * fileSpec, void *buffer, uint64_t offset, uint64_t length)␊ |
160 | {␊ |
161 | const char *filePath;␊ |
162 | BVRef bvr;␊ |
163 | ␉␊ |
164 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
165 | return -1;␊ |
166 | ␉␊ |
167 | if (bvr->fs_readfile == NULL)␊ |
168 | return -1;␊ |
169 | ␉␊ |
170 | return bvr->fs_readfile(bvr, (char *)filePath, buffer, offset, length);␊ |
171 | }␊ |
172 | #endif␊ |
173 | ␊ |
174 | long LoadThinFatFile(const char *fileSpec, void **binary)␊ |
175 | {␊ |
176 | const char *filePath;␊ |
177 | FSReadFile readFile;␊ |
178 | BVRef bvr;␊ |
179 | unsigned long length/*, length2*/; ␊ |
180 | ␉long length2;␊ |
181 | ␉␊ |
182 | // Resolve the boot volume from the file spec.␊ |
183 | ␉␊ |
184 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
185 | return -1;␊ |
186 | ␉␊ |
187 | *binary = (void *)kLoadAddr;␊ |
188 | ␉␊ |
189 | // Read file into load buffer. The data in the load buffer will be␊ |
190 | // overwritten by the next LoadFile() call.␊ |
191 | ␉␊ |
192 | ␉safe_set_env(envgFSLoadAddress, (uint32_t)(void *)LOAD_ADDR);␊ |
193 | ␉␊ |
194 | readFile = bvr->fs_readfile;␊ |
195 | ␉␊ |
196 | if (readFile != NULL) {␊ |
197 | // Read the first 4096 bytes (fat header)␊ |
198 | length = readFile(bvr, (char *)filePath, *binary, 0, 0x1000);␊ |
199 | if (length > 0) {␊ |
200 | if (ThinFatFile(binary, &length) == 0) {␊ |
201 | ␉␉␉␉if (length == 0)␊ |
202 | ␉␉␉␉␉return 0;␊ |
203 | // We found a fat binary; read only the thin part␊ |
204 | length = readFile(bvr, (char *)filePath,␊ |
205 | (void *)kLoadAddr, (unsigned long)(*binary) - kLoadAddr, length);␊ |
206 | *binary = (void *)kLoadAddr;␊ |
207 | } else {␊ |
208 | // Not a fat binary; read the rest of the file␊ |
209 | length2 = readFile(bvr, (char *)filePath, (void *)(kLoadAddr + length), length, 0);␊ |
210 | //if (length2 == -1) return -1;␊ |
211 | ␉␉␉␉if (length2 < 0) return -1;␊ |
212 | ␉␉␉␉␊ |
213 | length += (unsigned long)length2;␊ |
214 | }␊ |
215 | }␊ |
216 | } else {␊ |
217 | length = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
218 | if (length > 0) {␊ |
219 | ThinFatFile(binary, &length);␊ |
220 | }␊ |
221 | }␊ |
222 | ␉␊ |
223 | return length;␊ |
224 | }␊ |
225 | ␊ |
226 | // filesystem-specific getUUID functions call this shared string generator␊ |
227 | long CreateUUIDString(uint8_t uubytes[], int nbytes, char *uuidStr, long strMaxLen)␊ |
228 | {␊ |
229 | unsigned fmtbase, fmtidx, i;␊ |
230 | uint8_t uuidfmt[] = { 4, 2, 2, 2, 6 };␊ |
231 | char *p = uuidStr;␊ |
232 | char *end = p + strMaxLen;␊ |
233 | MD5_CTX md5c;␊ |
234 | uint8_t mdresult[16];␊ |
235 | ␉␊ |
236 | bzero(mdresult, sizeof(mdresult));␊ |
237 | ␉␊ |
238 | // just like AppleFileSystemDriver␊ |
239 | MD5Init(&md5c);␊ |
240 | MD5Update(&md5c, kFSUUIDNamespaceSHA1, sizeof(kFSUUIDNamespaceSHA1));␊ |
241 | MD5Update(&md5c, uubytes, nbytes);␊ |
242 | MD5Final(mdresult, &md5c);␊ |
243 | ␉␊ |
244 | // this UUID has been made version 3 style (i.e. via namespace)␊ |
245 | // see "-uuid-urn-" IETF draft (which otherwise copies byte for byte)␊ |
246 | mdresult[6] = 0x30 | ( mdresult[6] & 0x0F );␊ |
247 | mdresult[8] = 0x80 | ( mdresult[8] & 0x3F );␊ |
248 | ␉␊ |
249 | ␉␊ |
250 | // generate the text: e.g. 5EB1869F-C4FA-3502-BDEB-3B8ED5D87292␊ |
251 | fmtbase = 0;␊ |
252 | for(fmtidx = 0; fmtidx < sizeof(uuidfmt); fmtidx++) {␊ |
253 | for(i=0; i < uuidfmt[fmtidx]; i++) {␊ |
254 | if (p > end)␊ |
255 | {␊ |
256 | break;␊ |
257 | }␊ |
258 | else if (p == end)␊ |
259 | {␊ |
260 | break;␊ |
261 | *p = '\0';␊ |
262 | }␊ |
263 | uint8_t byte = mdresult[fmtbase+i];␊ |
264 | char nib;␊ |
265 | ␉␉␉␊ |
266 | nib = byte >> 4;␊ |
267 | *p = nib + '0'; // 0x4 -> '4'␊ |
268 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
269 | p++;␊ |
270 | ␉␉␉␊ |
271 | nib = byte & 0xf;␊ |
272 | *p = nib + '0'; // 0x4 -> '4'␊ |
273 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
274 | p++;␊ |
275 | ␉␉␉␊ |
276 | }␊ |
277 | fmtbase += i;␊ |
278 | if(fmtidx < sizeof(uuidfmt)-1)␊ |
279 | *(p++) = '-';␊ |
280 | else␊ |
281 | *p = '\0';␊ |
282 | }␊ |
283 | ␉␊ |
284 | return 0;␊ |
285 | }␊ |
286 | ␊ |
287 | ␊ |
288 | //==========================================================================␊ |
289 | // GetDirEntry - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
290 | // Fetch the next directory entry for the given directory.␊ |
291 | ␊ |
292 | long GetDirEntry(const char * dirSpec, long long * dirIndex, const char ** name, ␊ |
293 | long * flags, long * time)␊ |
294 | {␊ |
295 | const char * dirPath;␊ |
296 | BVRef bvr;␊ |
297 | ␉␊ |
298 | // Resolve the boot volume from the dir spec.␊ |
299 | ␉␊ |
300 | if ((bvr = getBootVolumeRef(dirSpec, &dirPath)) == NULL)␊ |
301 | return -1;␊ |
302 | ␉␊ |
303 | // Return 0 on success, or -1 if there are no additional entries.␊ |
304 | ␉␊ |
305 | return bvr->fs_getdirentry( bvr,␊ |
306 | ␉␉␉␉␉␉␉ /* dirPath */ (char *)dirPath,␊ |
307 | ␉␉␉␉␉␉␉ /* dirIndex */ dirIndex,␊ |
308 | ␉␉␉␉␉␉␉ /* dirEntry */ (char **)name, flags, time, 0, 0 );␊ |
309 | }␊ |
310 | ␊ |
311 | //==========================================================================␊ |
312 | // GetFileInfo - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
313 | // Get attributes for the specified file.␊ |
314 | ␊ |
315 | static char* gMakeDirSpec;␊ |
316 | ␊ |
317 | long GetFileInfo(const char * dirSpec, const char * name,␊ |
318 | long * flags, long * time)␊ |
319 | {␊ |
320 | long long index = 0;␊ |
321 | const char * entryName;␊ |
322 | ␉␊ |
323 | if (gMakeDirSpec == 0)␊ |
324 | gMakeDirSpec = (char *)malloc(1024);␊ |
325 | ␉␊ |
326 | ␉if (!gMakeDirSpec) return -1;␊ |
327 | ␊ |
328 | if (!dirSpec) {␊ |
329 | long idx, len;␊ |
330 | ␉␉␊ |
331 | len = strlen(name);␊ |
332 | ␉␉␊ |
333 | for (idx = len; idx && (name[idx] != '/' && name[idx] != '\\'); idx--) {}␊ |
334 | if (idx == 0) {␊ |
335 | gMakeDirSpec[0] = '/';␊ |
336 | gMakeDirSpec[1] = '\0';␊ |
337 | } else {␊ |
338 | idx++;␊ |
339 | strncpy(gMakeDirSpec, name, idx);␊ |
340 | name += idx;␊ |
341 | }␊ |
342 | dirSpec = gMakeDirSpec;␊ |
343 | }␊ |
344 | ␉␊ |
345 | while (GetDirEntry(dirSpec, &index, &entryName, flags, time) == 0)␊ |
346 | {␊ |
347 | if (strcmp(entryName, name) == 0)␊ |
348 | return 0; // success␊ |
349 | }␊ |
350 | return -1; // file not found␊ |
351 | }␊ |
352 | ␊ |
353 | //==========================================================================␊ |
354 | // GetFreeFD()␊ |
355 | ␊ |
356 | static int GetFreeFd(void)␊ |
357 | {␊ |
358 | ␉int␉fd;␊ |
359 | ␉␊ |
360 | ␉// Locate a free descriptor slot.␊ |
361 | ␉for (fd = 0; fd < NFILES; fd++) {␊ |
362 | ␉␉if (iob[fd].i_flgs == 0) {␊ |
363 | ␉␉␉return fd;␊ |
364 | ␉␉}␊ |
365 | ␉}␊ |
366 | ␉stop("Out of file descriptors");␊ |
367 | ␉// not reached␊ |
368 | ␉return -1;␊ |
369 | }␊ |
370 | ␊ |
371 | //==========================================================================␊ |
372 | // iob_from_fdesc()␊ |
373 | //␊ |
374 | // Return a pointer to an allocated 'iob' based on the file descriptor␊ |
375 | // provided. Returns NULL if the file descriptor given is invalid.␊ |
376 | ␊ |
377 | struct iob * iob_from_fdesc(int fdesc)␊ |
378 | {␊ |
379 | register struct iob * io;␊ |
380 | ␉␊ |
381 | if (fdesc < 0 || fdesc >= NFILES ||␊ |
382 | ((io = &iob[fdesc])->i_flgs & F_ALLOC) == 0)␊ |
383 | return NULL;␊ |
384 | else␊ |
385 | return io;␊ |
386 | }␊ |
387 | ␊ |
388 | //==========================================================================␊ |
389 | // open() - Open the file specified by 'path' for reading.␊ |
390 | ␊ |
391 | static int open_bvr(BVRef bvr, const char *filePath)␊ |
392 | {␊ |
393 | ␉struct iob␉*io;␊ |
394 | ␉int␉␉fdesc;␊ |
395 | ␉int␉␉i;␊ |
396 | ␉␊ |
397 | ␉if (bvr == NULL) {␊ |
398 | ␉␉return -1;␊ |
399 | ␉}␊ |
400 | ␉␊ |
401 | ␉fdesc = GetFreeFd();␊ |
402 | ␉io = &iob[fdesc];␊ |
403 | ␉bzero(io, sizeof(*io));␊ |
404 | ␉␊ |
405 | ␉// Mark the descriptor as taken.␊ |
406 | ␉io->i_flgs = F_ALLOC;␊ |
407 | ␉␊ |
408 | ␉// Find the next available memory block in the download buffer.␊ |
409 | ␉io->i_buf = (char *) LOAD_ADDR;␊ |
410 | ␉for (i = 0; i < NFILES; i++) {␊ |
411 | ␉␉if ((iob[i].i_flgs != F_ALLOC) || (i == fdesc)) {␊ |
412 | ␉␉␉continue;␊ |
413 | ␉␉}␊ |
414 | ␉␉io->i_buf = max(iob[i].i_filesize + iob[i].i_buf, io->i_buf);␊ |
415 | ␉}␊ |
416 | ␉␊ |
417 | ␉// Load entire file into memory. Unnecessary open() calls must be avoided.␊ |
418 | ␉//gFSLoadAddress = io->i_buf;␊ |
419 | ␉safe_set_env(envgFSLoadAddress, (uint32_t)(void *)io->i_buf);␊ |
420 | ␊ |
421 | ␉io->i_filesize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
422 | ␉if (io->i_filesize < 0) {␊ |
423 | ␉␉close(fdesc);␊ |
424 | ␉␉return -1;␊ |
425 | ␉}␊ |
426 | ␉return fdesc;␊ |
427 | }␊ |
428 | ␊ |
429 | ␊ |
430 | int open(const char *path)␊ |
431 | {␊ |
432 | ␉const char␉*filepath;␊ |
433 | ␉BVRef␉␉bvr;␊ |
434 | ␉␊ |
435 | ␉// Resolve the boot volume from the file spec.␊ |
436 | ␉if ((bvr = getBootVolumeRef(path, &filepath)) != NULL) {␊ |
437 | ␊ |
438 | return open_bvr(bvr, filepath);␊ |
439 | ␉}␊ |
440 | ␉return -1;␊ |
441 | }␊ |
442 | ␊ |
443 | ␊ |
444 | int open_bvdev(const char *bvd, const char *path)␊ |
445 | {␊ |
446 | ␉const struct devsw␉*dp;␊ |
447 | ␉const char␉␉*cp;␊ |
448 | ␉BVRef␉␉␉bvr;␊ |
449 | ␉int␉␉␉i;␊ |
450 | ␉int␉␉␉len;␊ |
451 | ␉int␉␉␉unit;␊ |
452 | ␉int␉␉␉partition;␊ |
453 | ␉␊ |
454 | ␉if ((i = open(path)) >= 0) {␊ |
455 | ␉␉return i;␊ |
456 | ␉}␊ |
457 | ␉␊ |
458 | ␉if (bvd == NULL || (len = strlen(bvd)) < 2) {␊ |
459 | ␉␉return -1;␊ |
460 | ␉}␊ |
461 | ␉␊ |
462 | ␉for (dp=devsw; dp->name; dp++) {␊ |
463 | ␉␉if (bvd[0] == dp->name[0] && bvd[1] == dp->name[1]) {␊ |
464 | ␉␉␉unit = 0;␊ |
465 | ␉␉␉partition = 0;␊ |
466 | ␉␉␉/* get optional unit and partition */␊ |
467 | ␉␉␉if (len >= 5 && bvd[2] == '(') { /* min must be present xx(0) */␊ |
468 | ␉␉␉␉cp = &bvd[3];␊ |
469 | ␉␉␉␉i = 0;␊ |
470 | ␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
471 | ␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
472 | ␉␉␉␉␉unit = i;␊ |
473 | ␉␉␉␉}␊ |
474 | ␉␉␉␉if (*cp++ == ',') {␊ |
475 | ␉␉␉␉␉i = 0;␊ |
476 | ␉␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
477 | ␉␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
478 | ␉␉␉␉␉␉partition = i;␊ |
479 | ␉␉␉␉␉}␊ |
480 | ␉␉␉␉}␊ |
481 | ␉␉␉}␊ |
482 | ␉␉␉bvr = newBootVolumeRef(dp->biosdev + unit, partition);␊ |
483 | ␊ |
484 | return open_bvr(bvr, path);␊ |
485 | ␉␉}␊ |
486 | ␉}␊ |
487 | ␉return -1;␊ |
488 | }␊ |
489 | ␊ |
490 | //==========================================================================␊ |
491 | // close() - Close a file descriptor.␊ |
492 | ␊ |
493 | int close(int fdesc)␊ |
494 | {␊ |
495 | struct iob * io;␊ |
496 | ␉␊ |
497 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
498 | return (-1);␊ |
499 | ␉␊ |
500 | io->i_flgs = 0;␊ |
501 | ␉␊ |
502 | return 0;␊ |
503 | }␊ |
504 | ␊ |
505 | //==========================================================================␊ |
506 | // read() - Read up to 'count' bytes of data from the file descriptor␊ |
507 | // into the buffer pointed to by buf.␊ |
508 | ␊ |
509 | int read(int fdesc, char * buf, int count)␊ |
510 | {␊ |
511 | struct iob * io;␊ |
512 | ␊ |
513 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
514 | return (-1);␊ |
515 | ␉␊ |
516 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
517 | count = io->i_filesize - io->i_offset;␊ |
518 | ␉␊ |
519 | if (count <= 0)␊ |
520 | return 0; // end of file␊ |
521 | ␉␊ |
522 | bcopy(io->i_buf + io->i_offset, buf, count);␊ |
523 | ␉␊ |
524 | io->i_offset += count;␊ |
525 | ␉␊ |
526 | return count;␊ |
527 | }␊ |
528 | ␊ |
529 | //==========================================================================␊ |
530 | // file_size() - Returns the size of the file described by the file␊ |
531 | // descriptor.␊ |
532 | ␊ |
533 | int file_size(int fdesc)␊ |
534 | {␊ |
535 | struct iob * io;␊ |
536 | ␉␊ |
537 | if ((io = iob_from_fdesc(fdesc)) == 0)␊ |
538 | return 0;␊ |
539 | ␉␊ |
540 | return io->i_filesize;␊ |
541 | }␊ |
542 | ␊ |
543 | #if UNUSED␊ |
544 | //==========================================================================␊ |
545 | ␊ |
546 | struct dirstuff * opendir(const char * path)␊ |
547 | {␊ |
548 | struct dirstuff * dirp = 0;␊ |
549 | const char * dirPath;␊ |
550 | BVRef bvr;␊ |
551 | ␉␊ |
552 | if ((bvr = getBootVolumeRef(path, &dirPath)) == NULL)␊ |
553 | goto error;␊ |
554 | ␉␊ |
555 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
556 | if (dirp == NULL)␊ |
557 | goto error;␊ |
558 | ␉␊ |
559 | dirp->dir_path = newString(dirPath);␊ |
560 | if (dirp->dir_path == NULL)␊ |
561 | goto error;␊ |
562 | ␉␊ |
563 | dirp->dir_bvr = bvr;␊ |
564 | ␉␊ |
565 | return dirp;␊ |
566 | ␉␊ |
567 | error:␊ |
568 | closedir(dirp);␊ |
569 | return NULL;␊ |
570 | }␊ |
571 | ␊ |
572 | //==========================================================================␊ |
573 | ␊ |
574 | int closedir(struct dirstuff * dirp)␊ |
575 | {␊ |
576 | if (dirp) {␊ |
577 | if (dirp->dir_path) free(dirp->dir_path);␊ |
578 | free(dirp);␊ |
579 | }␊ |
580 | return 0;␊ |
581 | }␊ |
582 | ␊ |
583 | //==========================================================================␊ |
584 | ␊ |
585 | int readdir(struct dirstuff * dirp, const char ** name, long * flags,␊ |
586 | long * time)␊ |
587 | {␊ |
588 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
589 | ␉␉␉␉␉␉␉␉␉␉ /* dirPath */ dirp->dir_path,␊ |
590 | ␉␉␉␉␉␉␉␉␉␉ /* dirIndex */ &dirp->dir_index,␊ |
591 | ␉␉␉␉␉␉␉␉␉␉ /* dirEntry */ (char **)name, flags, time,␊ |
592 | ␉␉␉␉␉␉␉␉␉␉ 0, 0);␊ |
593 | }␊ |
594 | ␊ |
595 | long GetFSUUID(char *spec, char *uuidStr, long strMaxLen)␊ |
596 | {␊ |
597 | BVRef bvr;␊ |
598 | long rval = -1;␊ |
599 | const char *devSpec;␊ |
600 | ␉␊ |
601 | if ((bvr = getBootVolumeRef(spec, &devSpec)) == NULL)␊ |
602 | return -1;␊ |
603 | ␉␊ |
604 | if(bvr->fs_getuuid)␊ |
605 | rval = bvr->fs_getuuid(bvr, uuidStr, strMaxLen);␊ |
606 | ␉␊ |
607 | return rval;␊ |
608 | }␊ |
609 | ␊ |
610 | long GetFileBlock(const char *fileSpec, unsigned long long *firstBlock)␊ |
611 | {␊ |
612 | const char * filePath;␊ |
613 | BVRef bvr;␊ |
614 | ␉␊ |
615 | // Resolve the boot volume from the file spec.␊ |
616 | ␉␊ |
617 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL) {␊ |
618 | printf("Boot volume for '%s' is bogus\n", fileSpec);␊ |
619 | return -1;␊ |
620 | }␊ |
621 | ␉␊ |
622 | return bvr->fs_getfileblock(bvr, (char *)filePath, firstBlock);␊ |
623 | }␊ |
624 | ␊ |
625 | //==========================================================================␊ |
626 | // openmem()␊ |
627 | ␊ |
628 | int openmem(char * buf, int len)␊ |
629 | {␊ |
630 | int fdesc;␊ |
631 | struct iob * io;␊ |
632 | ␉␊ |
633 | fdesc = GetFreeFd();␊ |
634 | io = &iob[fdesc];␊ |
635 | bzero(io, sizeof(*io));␊ |
636 | ␉␊ |
637 | // Mark the descriptor as taken. Set the F_MEM flag to indicate␊ |
638 | // that the file buffer is provided by the caller.␊ |
639 | ␉␊ |
640 | io->i_flgs = F_ALLOC | F_MEM;␊ |
641 | io->i_buf = buf;␊ |
642 | io->i_filesize = len;␊ |
643 | ␉␊ |
644 | return fdesc;␊ |
645 | }␊ |
646 | ␊ |
647 | //==========================================================================␊ |
648 | // lseek() - Reposition the byte offset of the file descriptor from the␊ |
649 | // beginning of the file. Returns the relocated offset.␊ |
650 | ␊ |
651 | int b_lseek(int fdesc, int offset, int ptr)␊ |
652 | {␊ |
653 | struct iob * io;␊ |
654 | ␉␊ |
655 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
656 | return (-1);␊ |
657 | ␉␊ |
658 | io->i_offset = offset;␊ |
659 | ␉␊ |
660 | return offset;␊ |
661 | }␊ |
662 | ␊ |
663 | //==========================================================================␊ |
664 | // tell() - Returns the byte offset of the file descriptor.␊ |
665 | ␊ |
666 | int tell(int fdesc)␊ |
667 | {␊ |
668 | struct iob * io;␊ |
669 | ␉␊ |
670 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
671 | return 0;␊ |
672 | ␉␊ |
673 | return io->i_offset;␊ |
674 | }␊ |
675 | #endif␊ |
676 | //==========================================================================␊ |
677 | // write() - Write up to 'count' bytes of data to the file descriptor␊ |
678 | // from the buffer pointed to by buf.␊ |
679 | ␊ |
680 | int write(int fdesc, const char * buf, int count)␊ |
681 | {␊ |
682 | struct iob * io;␊ |
683 | ␊ |
684 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
685 | return (-1);␊ |
686 | ␉␊ |
687 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
688 | count = io->i_filesize - io->i_offset;␊ |
689 | ␉␊ |
690 | if (count <= 0)␊ |
691 | return 0; // end of file␊ |
692 | ␉␊ |
693 | bcopy(buf, io->i_buf + io->i_offset, count);␊ |
694 | ␉␊ |
695 | io->i_offset += count;␊ |
696 | ␉␊ |
697 | return count;␊ |
698 | }␊ |
699 | #if UNUSED␊ |
700 | int writebyte(int fdesc, char value)␊ |
701 | {␊ |
702 | struct iob * io;␊ |
703 | ␊ |
704 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
705 | return (-1);␊ |
706 | ␉␊ |
707 | if ((io->i_offset + 1) > (unsigned int)io->i_filesize)␊ |
708 | return 0; // end of file␊ |
709 | ␉␊ |
710 | io->i_buf[io->i_offset++] = value;␊ |
711 | ␉␊ |
712 | return 1;␊ |
713 | }␊ |
714 | ␊ |
715 | int writeint(int fdesc, int value)␊ |
716 | {␊ |
717 | struct iob * io;␊ |
718 | ␊ |
719 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
720 | return (-1);␊ |
721 | ␉␊ |
722 | if ((io->i_offset + 4) > (unsigned int)io->i_filesize)␊ |
723 | return 0; // end of file␊ |
724 | ␉␊ |
725 | bcopy(&value, io->i_buf + io->i_offset, 4);␊ |
726 | ␉␊ |
727 | io->i_offset += 4;␊ |
728 | ␉␊ |
729 | return 4;␊ |
730 | }␊ |
731 | //==========================================================================␊ |
732 | ␊ |
733 | struct dirstuff * vol_opendir(BVRef bvr, const char * path)␊ |
734 | {␊ |
735 | struct dirstuff * dirp = 0;␊ |
736 | ␉␊ |
737 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
738 | if (dirp == NULL)␊ |
739 | goto error;␊ |
740 | ␉␊ |
741 | dirp->dir_path = newString(path);␊ |
742 | if (dirp->dir_path == NULL)␊ |
743 | goto error;␊ |
744 | ␉␊ |
745 | dirp->dir_bvr = bvr;␊ |
746 | ␉␊ |
747 | return dirp;␊ |
748 | ␉␊ |
749 | error:␊ |
750 | closedir(dirp);␊ |
751 | return NULL;␊ |
752 | }␊ |
753 | ␊ |
754 | //==========================================================================␊ |
755 | ␊ |
756 | int readdir_ext(struct dirstuff * dirp, const char ** name, long * flags,␊ |
757 | ␉␉␉␉long * time, FinderInfo *finderInfo, long *infoValid)␊ |
758 | {␊ |
759 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
760 | ␉␉␉␉␉␉␉␉␉␉ /* dirPath */ dirp->dir_path,␊ |
761 | ␉␉␉␉␉␉␉␉␉␉ /* dirIndex */ &dirp->dir_index,␊ |
762 | ␉␉␉␉␉␉␉␉␉␉ /* dirEntry */ (char **)name,␊ |
763 | ␉␉␉␉␉␉␉␉␉␉ flags, time,␊ |
764 | ␉␉␉␉␉␉␉␉␉␉ finderInfo, infoValid);␊ |
765 | }␊ |
766 | //==========================================================================␊ |
767 | ␊ |
768 | const char * systemConfigDir()␊ |
769 | {␊ |
770 | if (get_env(envgBootFileType) == kNetworkDeviceType)␊ |
771 | ␉␉return "";␊ |
772 | return "/Library/Preferences/SystemConfiguration";␊ |
773 | }␊ |
774 | ␊ |
775 | #endif␊ |
776 | ␊ |
777 | //==========================================================================␊ |
778 | ␊ |
779 | void scanBootVolumes( int biosdev, int * count )␊ |
780 | {␊ |
781 | ␉BVRef bvr = 0;␊ |
782 | ␉␊ |
783 | ␉bvr = diskScanBootVolumes(biosdev, count);␊ |
784 | ␉if (bvr == NULL)␊ |
785 | ␉{␊ |
786 | #ifdef NBP_SUPPORT␊ |
787 | ␉␉bvr = nbpScanBootVolumes(biosdev, count);␊ |
788 | ␉␉if (bvr != NULL)␊ |
789 | ␉␉{␊ |
790 | ␉␉␉safe_set_env(envgBootFileType, kNetworkDeviceType);␊ |
791 | ␉␉}␊ |
792 | #endif␊ |
793 | ␉}␊ |
794 | ␉else␊ |
795 | ␉{␊ |
796 | ␉␉safe_set_env(envgBootFileType, kBlockDeviceType);␊ |
797 | ␊ |
798 | ␉}␊ |
799 | }␊ |
800 | ␊ |
801 | //==========================================================================␊ |
802 | ␊ |
803 | void scanDisks(void)␊ |
804 | {␊ |
805 | #define MAX_HDD_COUNT 32␊ |
806 | ␉int bvCount;␊ |
807 | ␉int hd = 0;␊ |
808 | ␉␊ |
809 | ␉// Testing up to MAX_HDD_COUNT hard drives.␊ |
810 | ␉while(!testBiosread(0x80 + hd, 0) && hd < MAX_HDD_COUNT)␊ |
811 | ␉{␊ |
812 | ␉␉bvCount = 0;␊ |
813 | ␉␉scanBootVolumes(0x80 + hd, &bvCount);␊ |
814 | ␉␉hd++;␊ |
815 | ␉}␊ |
816 | ␉int gBIOSDev = (int)get_env(envgBIOSDev);␊ |
817 | ␉// Also scanning CD/DVD drive.␊ |
818 | ␉if (biosDevIsCDROM(gBIOSDev))␊ |
819 | ␉{␊ |
820 | ␉␉bvCount = 0;␊ |
821 | ␉␉scanBootVolumes(gBIOSDev, &bvCount);␊ |
822 | ␉}␊ |
823 | }␊ |
824 | ␊ |
825 | //==========================================================================␊ |
826 | ␊ |
827 | BVRef selectBootVolume( BVRef chain )␊ |
828 | {␊ |
829 | ␉bool filteredChain = false;␊ |
830 | ␉bool foundPrimary = false;␊ |
831 | ␉BVRef bvr, bvr1 = 0, bvr2 = 0;␊ |
832 | ␉␊ |
833 | ␉if (chain->filtered) filteredChain = true;␊ |
834 | ␉␊ |
835 | ␉int gBIOSDev = (int)get_env(envgBIOSDev);␊ |
836 | ␊ |
837 | #if UNUSED␊ |
838 | ␉if (multiboot_partition_set)␊ |
839 | ␉␉for (bvr = chain; bvr < (BVRef)ULONG_MAX; bvr = bvr->next) {␊ |
840 | if (!bvr) {␊ |
841 | break;␊ |
842 | }␊ |
843 | ␉␉␉if ( bvr->part_no == multiboot_partition && bvr->biosdev == gBIOSDev ) ␊ |
844 | ␉␉␉␉return bvr;␊ |
845 | }␊ |
846 | #endif␊ |
847 | ␉/*␊ |
848 | ␉ * Checking "Default Partition" key in system configuration - use format: hd(x,y), the volume UUID or label -␊ |
849 | ␉ * to override the default selection.␊ |
850 | ␉ * We accept only kBVFlagSystemVolume or kBVFlagForeignBoot volumes.␊ |
851 | ␉ */␊ |
852 | ␉char *val = XMLDecode(getStringForKey(kDefaultPartition, DEFAULT_BOOT_CONFIG));␊ |
853 | if (val) {␊ |
854 | for (bvr = chain; bvr < (BVRef)ULONG_MAX; bvr = bvr->next) ␊ |
855 | {␊ |
856 | if (!bvr) {␊ |
857 | break;␊ |
858 | }␊ |
859 | if (matchVolumeToString(bvr, val, false)) {␊ |
860 | free(val);␊ |
861 | return bvr;␊ |
862 | }␊ |
863 | }␊ |
864 | free(val);␊ |
865 | }␊ |
866 | ␉␊ |
867 | ␉/*␊ |
868 | ␉ * Scannig the volume chain backwards and trying to find ␊ |
869 | ␉ * a HFS+ volume with valid boot record signature.␊ |
870 | ␉ * If not found any active partition then we will␊ |
871 | ␉ * select this volume as the boot volume.␊ |
872 | ␉ */␊ |
873 | ␉␊ |
874 | ␉{ ␊ |
875 | for (bvr = chain; bvr < (BVRef)ULONG_MAX; bvr = bvr->next)␊ |
876 | {␊ |
877 | if (!bvr) {␊ |
878 | break;␊ |
879 | }␊ |
880 | #if UNUSED␊ |
881 | ␉␉␉if (multiboot_skip_partition_set) {␊ |
882 | ␉␉␉␉if (bvr->part_no == multiboot_skip_partition) continue;␊ |
883 | ␉␉␉}␊ |
884 | #endif␊ |
885 | ␉␉␉if ( (bvr->flags & kBVFlagPrimary) && (bvr->biosdev == gBIOSDev) ) foundPrimary = true;␊ |
886 | ␉␉␉// zhell -- Undo a regression that was introduced from r491 to 492.␊ |
887 | ␉␉␉// if gBIOSBootVolume is set already, no change is required␊ |
888 | ␉␉␉if ( (bvr->flags & (kBVFlagBootable|kBVFlagSystemVolume))␊ |
889 | ␉␉␉␉&& get_env(envgBIOSBootVolume)␊ |
890 | ␉␉␉␉&& (!filteredChain || (filteredChain && bvr->visible))␊ |
891 | ␉␉␉␉&& (bvr->biosdev == gBIOSDev) )␊ |
892 | ␉␉␉{␊ |
893 | ␉␉␉␉bvr2 = bvr;␉␉␉␉␊ |
894 | ␉␉␉}␊ |
895 | ␊ |
896 | ␉␉␉// zhell -- if gBIOSBootVolume is NOT set, we use the "if" statement␊ |
897 | ␉␉␉// from r491,␊ |
898 | ␉␉␉if ( bvr->flags & kBVFlagBootable␊ |
899 | ␉␉␉␉&& !get_env(envgBIOSBootVolume)/*gBIOSBootVolume*/␊ |
900 | ␉␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
901 | ␉␉␉{␊ |
902 | ␉␉␉␉bvr2 = bvr;␉␉␉␉␊ |
903 | ␉␉␉}␊ |
904 | }␊ |
905 | ␉}␊ |
906 | ␊ |
907 | ␉/*␊ |
908 | ␉ * Use the standrad method for selecting the boot volume.␊ |
909 | ␉ */␊ |
910 | ␉if (foundPrimary)␊ |
911 | ␉{␊ |
912 | ␉␉for (bvr = chain; bvr < (BVRef)ULONG_MAX; bvr = bvr->next)␊ |
913 | {␊ |
914 | if (!bvr) {␊ |
915 | break;␊ |
916 | }␊ |
917 | ␉␉␉if ( bvr->flags & kBVFlagNativeBoot && bvr->biosdev == gBIOSDev ) bvr1 = bvr;␊ |
918 | ␉␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) bvr2 = bvr;␊ |
919 | ␉␉}␊ |
920 | ␉}␊ |
921 | ␉␊ |
922 | ␉bvr = bvr2 ? bvr2 :␊ |
923 | ␉bvr1 ? bvr1 : chain;␊ |
924 | ␉␊ |
925 | ␉return bvr;␊ |
926 | }␊ |
927 | ␊ |
928 | //==========================================================================␊ |
929 | ␊ |
930 | #define LP '('␊ |
931 | #define RP ')'␊ |
932 | ␊ |
933 | /*!␊ |
934 | This is like boot2's gBootVolume except it is for the internal use of␊ |
935 | libsaio to track which volume an unqualified path should be relative to.␊ |
936 | This replaces bootInfo->kernDev as the carrier of this information.␊ |
937 | */␊ |
938 | static BVRef gRootVolume;␊ |
939 | ␊ |
940 | void setRootVolume(BVRef volume)␊ |
941 | {␊ |
942 | gRootVolume = volume;␊ |
943 | // Veto non-native FS. Basically that means don't allow the root volume to␊ |
944 | // be set to a volume we can't read files from.␊ |
945 | if(gRootVolume != NULL && ((gRootVolume->flags & kBVFlagNativeBoot) == 0))␊ |
946 | gRootVolume = NULL;␊ |
947 | }␊ |
948 | ␊ |
949 | void setBootGlobals(BVRef chain)␊ |
950 | {␊ |
951 | ␉// Record default boot device.␊ |
952 | ␉BVRef gBootVolume = selectBootVolume(chain);␊ |
953 | ␉␊ |
954 | ␉// turbo - Save the ORIGINAL boot volume too for loading our mkext␊ |
955 | ␉if (!get_env(envgBIOSBootVolume)) safe_set_env(envgBIOSBootVolume, (uint32_t)gBootVolume);␊ |
956 | ␊ |
957 | ␉safe_set_env(envgBootVolume, (uint32_t)gBootVolume);␊ |
958 | ␉setRootVolume(gBootVolume);␉␊ |
959 | }␊ |
960 | ␊ |
961 | /*!␊ |
962 | Extracts the volume selector from the pathname, returns the selected␊ |
963 | BVRef, and sets *outPath to the remainder of the path.␊ |
964 | If the path did not include a volume selector then the current volume␊ |
965 | is used. When called with a volume selector the current volume␊ |
966 | is changed to the selected volume unless the volume selector is␊ |
967 | that of a ramdisk.␊ |
968 | */␊ |
969 | BVRef getBootVolumeRef( const char * path, const char ** outPath )␊ |
970 | {␊ |
971 | const char * cp;␊ |
972 | BVRef bvr = gRootVolume;␊ |
973 | //int biosdev = (int)get_env(envgBIOSDev);␊ |
974 | ␉␊ |
975 | // Search for left parenthesis in the path specification.␊ |
976 | ␉␊ |
977 | for (cp = path; *cp; cp++) {␊ |
978 | if (*cp == LP || *cp == '/') break;␊ |
979 | }␊ |
980 | ␉␊ |
981 | if (*cp != LP) // no left paren found␊ |
982 | {␊ |
983 | // Path is using the implicit current device so if there is␊ |
984 | // no current device, then we must fail.␊ |
985 | cp = path;␊ |
986 | if ( gRootVolume == NULL )␊ |
987 | return NULL;␊ |
988 | }␊ |
989 | else if ((cp - path) == 2) // found "xx("␊ |
990 | {␊ |
991 | const struct devsw * dp;␊ |
992 | const char * xp = path;␊ |
993 | int i;␊ |
994 | int unit = -1;␊ |
995 | int part = -1;␊ |
996 | ␉␉␊ |
997 | cp++;␊ |
998 | ␉␉␊ |
999 | // Check the 2 character device name pointed by 'xp'.␊ |
1000 | ␉␉␊ |
1001 | for (dp = devsw; dp->name; dp++)␊ |
1002 | {␊ |
1003 | if ((xp[0] == dp->name[0]) && (xp[1] == dp->name[1]))␊ |
1004 | break; // found matching entry␊ |
1005 | }␊ |
1006 | if (dp->name == NULL)␊ |
1007 | {␊ |
1008 | error("Unknown device '%c%c'\n", xp[0], xp[1]);␊ |
1009 | return NULL;␊ |
1010 | }␊ |
1011 | ␊ |
1012 | // Extract the optional unit number from the specification.␊ |
1013 | // hd(unit) or hd(unit, part).␊ |
1014 | ␉␉␊ |
1015 | i = 0;␊ |
1016 | while (*cp >= '0' && *cp <= '9')␊ |
1017 | {␊ |
1018 | i = i * 10 + *cp++ - '0';␊ |
1019 | unit = i;␊ |
1020 | }␊ |
1021 | ␉␉␊ |
1022 | // Unit is no longer optional and never really was.␊ |
1023 | // If the user failed to specify it then the unit number from the previous kernDev␊ |
1024 | // would have been used which makes little sense anyway.␊ |
1025 | // For example, if the user did fd()/foobar and the current root device was the␊ |
1026 | // second hard disk (i.e. unit 1) then fd() would select the second floppy drive!␊ |
1027 | if(unit == -1)␊ |
1028 | return NULL;␊ |
1029 | ␉␉␊ |
1030 | // Extract the optional partition number from the specification.␊ |
1031 | ␉␉␊ |
1032 | if (*cp == ',')␊ |
1033 | part = atoi(++cp);␊ |
1034 | ␉␉␊ |
1035 | // If part is not specified part will be -1 whereas before it would have been␊ |
1036 | // whatever the last partition was which makes about zero sense if the device␊ |
1037 | // has been switched.␊ |
1038 | ␉␉␊ |
1039 | // Skip past the right paren.␊ |
1040 | ␉␉␊ |
1041 | for ( ; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1042 | if (*cp == RP) cp++;␊ |
1043 | ␊ |
1044 | int biosdev = dp->biosdev + unit;␊ |
1045 | bvr = newBootVolumeRef(biosdev, part);␊ |
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 | ␉execute_hook("newRamDisk_BVR", &biosdev, &bvr1, NULL, NULL, NULL, NULL);␊ |
1079 | ␉␊ |
1080 | // Try resolving "rd" and "bt" devices first.␊ |
1081 | ␉␊ |
1082 | ␉if (biosdev == kPseudoBIOSDevBooter)␊ |
1083 | ␉{␊ |
1084 | ␉␉if (bvr1 == NULL )␊ |
1085 | ␉␉␉bvr1 = (BVRef)(uint32_t)get_env(envgBIOSBootVolume);␊ |
1086 | ␉}␊ |
1087 | ␉else␊ |
1088 | ␉{␊ |
1089 | ␉␉// Fetch the volume list from the device.␊ |
1090 | ␉␉␊ |
1091 | ␉␉scanBootVolumes( biosdev, NULL );␊ |
1092 | ␉␉bvrChain = getBVChainForBIOSDev(biosdev);␊ |
1093 | ␉␉␊ |
1094 | ␉␉// Look for a perfect match based on device and partition number.␊ |
1095 | ␉␉␊ |
1096 | ␉␉for ( bvr1 = NULL, bvr = bvrChain; bvr; bvr = bvr->next )␊ |
1097 | ␉␉{␊ |
1098 | ␉␉␉if ( ( bvr->flags & kBVFlagNativeBoot ) == 0 ) continue;␊ |
1099 | ␉␉␉␊ |
1100 | ␉␉␉bvr1 = bvr;␊ |
1101 | ␉␉␉if ( bvr->part_no == partno ) break;␊ |
1102 | ␉␉}␊ |
1103 | ␉}␊ |
1104 | ␉␊ |
1105 | ␉return bvr ? bvr : bvr1;␊ |
1106 | }␊ |
1107 | ␊ |
1108 | //==========================================================================␊ |
1109 | // getDeviceDescription() - Extracts unit number and partition number␊ |
1110 | // from bvr structure into "dw(u,p)" format.␊ |
1111 | // Returns length of the out string␊ |
1112 | int getDeviceDescription(BVRef bvr, char *str, long strMaxLen)␊ |
1113 | {␊ |
1114 | if(!str)␊ |
1115 | return 0;␊ |
1116 | ␊ |
1117 | ␉*str = '\0';␊ |
1118 | ␉␊ |
1119 | ␉if (bvr)␊ |
1120 | ␉{␊ |
1121 | const struct devsw *dp = devsw;␊ |
1122 | ␉␉while(dp->name && bvr->biosdev >= dp->biosdev)␊ |
1123 | dp++;␊ |
1124 | ␊ |
1125 | ␉␉dp--;␊ |
1126 | ␉␉if (dp->name)␊ |
1127 | return snprintf(str, strMaxLen, "%s(%d,%d)", dp->name, bvr->biosdev - dp->biosdev, bvr->part_no);␊ |
1128 | ␉}␊ |
1129 | ␉␊ |
1130 | ␉return 0;␊ |
1131 | }␊ |
1132 | |