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)␊ |
228 | {␊ |
229 | unsigned fmtbase, fmtidx, i;␊ |
230 | uint8_t uuidfmt[] = { 4, 2, 2, 2, 6 };␊ |
231 | char *p = uuidStr;␊ |
232 | MD5_CTX md5c;␊ |
233 | uint8_t mdresult[16];␊ |
234 | ␉␊ |
235 | bzero(mdresult, sizeof(mdresult));␊ |
236 | ␉␊ |
237 | // just like AppleFileSystemDriver␊ |
238 | MD5Init(&md5c);␊ |
239 | MD5Update(&md5c, kFSUUIDNamespaceSHA1, sizeof(kFSUUIDNamespaceSHA1));␊ |
240 | MD5Update(&md5c, uubytes, nbytes);␊ |
241 | MD5Final(mdresult, &md5c);␊ |
242 | ␉␊ |
243 | // this UUID has been made version 3 style (i.e. via namespace)␊ |
244 | // see "-uuid-urn-" IETF draft (which otherwise copies byte for byte)␊ |
245 | mdresult[6] = 0x30 | ( mdresult[6] & 0x0F );␊ |
246 | mdresult[8] = 0x80 | ( mdresult[8] & 0x3F );␊ |
247 | ␉␊ |
248 | ␉␊ |
249 | // generate the text: e.g. 5EB1869F-C4FA-3502-BDEB-3B8ED5D87292␊ |
250 | fmtbase = 0;␊ |
251 | for(fmtidx = 0; fmtidx < sizeof(uuidfmt); fmtidx++) {␊ |
252 | for(i=0; i < uuidfmt[fmtidx]; i++) {␊ |
253 | uint8_t byte = mdresult[fmtbase+i];␊ |
254 | char nib;␊ |
255 | ␉␉␉␊ |
256 | nib = byte >> 4;␊ |
257 | *p = nib + '0'; // 0x4 -> '4'␊ |
258 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
259 | p++;␊ |
260 | ␉␉␉␊ |
261 | nib = byte & 0xf;␊ |
262 | *p = nib + '0'; // 0x4 -> '4'␊ |
263 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
264 | p++;␊ |
265 | ␉␉␉␊ |
266 | }␊ |
267 | fmtbase += i;␊ |
268 | if(fmtidx < sizeof(uuidfmt)-1)␊ |
269 | *(p++) = '-';␊ |
270 | else␊ |
271 | *p = '\0';␊ |
272 | }␊ |
273 | ␉␊ |
274 | return 0;␊ |
275 | }␊ |
276 | ␊ |
277 | ␊ |
278 | //==========================================================================␊ |
279 | // GetDirEntry - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
280 | // Fetch the next directory entry for the given directory.␊ |
281 | ␊ |
282 | long GetDirEntry(const char * dirSpec, long long * dirIndex, const char ** name, ␊ |
283 | long * flags, long * time)␊ |
284 | {␊ |
285 | const char * dirPath;␊ |
286 | BVRef bvr;␊ |
287 | ␉␊ |
288 | // Resolve the boot volume from the dir spec.␊ |
289 | ␉␊ |
290 | if ((bvr = getBootVolumeRef(dirSpec, &dirPath)) == NULL)␊ |
291 | return -1;␊ |
292 | ␉␊ |
293 | // Return 0 on success, or -1 if there are no additional entries.␊ |
294 | ␉␊ |
295 | return bvr->fs_getdirentry( bvr,␊ |
296 | ␉␉␉␉␉␉␉ /* dirPath */ (char *)dirPath,␊ |
297 | ␉␉␉␉␉␉␉ /* dirIndex */ dirIndex,␊ |
298 | ␉␉␉␉␉␉␉ /* dirEntry */ (char **)name, flags, time, 0, 0 );␊ |
299 | }␊ |
300 | ␊ |
301 | //==========================================================================␊ |
302 | // GetFileInfo - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
303 | // Get attributes for the specified file.␊ |
304 | ␊ |
305 | static char* gMakeDirSpec;␊ |
306 | ␊ |
307 | long GetFileInfo(const char * dirSpec, const char * name,␊ |
308 | long * flags, long * time)␊ |
309 | {␊ |
310 | long long index = 0;␊ |
311 | const char * entryName;␊ |
312 | ␉␊ |
313 | if (gMakeDirSpec == 0)␊ |
314 | gMakeDirSpec = (char *)malloc(1024);␊ |
315 | ␉␊ |
316 | ␉if (!gMakeDirSpec) return -1;␊ |
317 | ␊ |
318 | if (!dirSpec) {␊ |
319 | long idx, len;␊ |
320 | ␉␉␊ |
321 | len = strlen(name);␊ |
322 | ␉␉␊ |
323 | for (idx = len; idx && (name[idx] != '/' && name[idx] != '\\'); idx--) {}␊ |
324 | if (idx == 0) {␊ |
325 | gMakeDirSpec[0] = '/';␊ |
326 | gMakeDirSpec[1] = '\0';␊ |
327 | } else {␊ |
328 | idx++;␊ |
329 | strncpy(gMakeDirSpec, name, idx);␊ |
330 | name += idx;␊ |
331 | }␊ |
332 | dirSpec = gMakeDirSpec;␊ |
333 | }␊ |
334 | ␉␊ |
335 | while (GetDirEntry(dirSpec, &index, &entryName, flags, time) == 0)␊ |
336 | {␊ |
337 | if (strcmp(entryName, name) == 0)␊ |
338 | return 0; // success␊ |
339 | }␊ |
340 | return -1; // file not found␊ |
341 | }␊ |
342 | ␊ |
343 | //==========================================================================␊ |
344 | // GetFreeFD()␊ |
345 | ␊ |
346 | static int GetFreeFd(void)␊ |
347 | {␊ |
348 | ␉int␉fd;␊ |
349 | ␉␊ |
350 | ␉// Locate a free descriptor slot.␊ |
351 | ␉for (fd = 0; fd < NFILES; fd++) {␊ |
352 | ␉␉if (iob[fd].i_flgs == 0) {␊ |
353 | ␉␉␉return fd;␊ |
354 | ␉␉}␊ |
355 | ␉}␊ |
356 | ␉stop("Out of file descriptors");␊ |
357 | ␉// not reached␊ |
358 | ␉return -1;␊ |
359 | }␊ |
360 | ␊ |
361 | //==========================================================================␊ |
362 | // iob_from_fdesc()␊ |
363 | //␊ |
364 | // Return a pointer to an allocated 'iob' based on the file descriptor␊ |
365 | // provided. Returns NULL if the file descriptor given is invalid.␊ |
366 | ␊ |
367 | struct iob * iob_from_fdesc(int fdesc)␊ |
368 | {␊ |
369 | register struct iob * io;␊ |
370 | ␉␊ |
371 | if (fdesc < 0 || fdesc >= NFILES ||␊ |
372 | ((io = &iob[fdesc])->i_flgs & F_ALLOC) == 0)␊ |
373 | return NULL;␊ |
374 | else␊ |
375 | return io;␊ |
376 | }␊ |
377 | ␊ |
378 | //==========================================================================␊ |
379 | // open() - Open the file specified by 'path' for reading.␊ |
380 | ␊ |
381 | static int open_bvr(BVRef bvr, const char *filePath)␊ |
382 | {␊ |
383 | ␉struct iob␉*io;␊ |
384 | ␉int␉␉fdesc;␊ |
385 | ␉int␉␉i;␊ |
386 | ␉␊ |
387 | ␉if (bvr == NULL) {␊ |
388 | ␉␉return -1;␊ |
389 | ␉}␊ |
390 | ␉␊ |
391 | ␉fdesc = GetFreeFd();␊ |
392 | ␉io = &iob[fdesc];␊ |
393 | ␉bzero(io, sizeof(*io));␊ |
394 | ␉␊ |
395 | ␉// Mark the descriptor as taken.␊ |
396 | ␉io->i_flgs = F_ALLOC;␊ |
397 | ␉␊ |
398 | ␉// Find the next available memory block in the download buffer.␊ |
399 | ␉io->i_buf = (char *) LOAD_ADDR;␊ |
400 | ␉for (i = 0; i < NFILES; i++) {␊ |
401 | ␉␉if ((iob[i].i_flgs != F_ALLOC) || (i == fdesc)) {␊ |
402 | ␉␉␉continue;␊ |
403 | ␉␉}␊ |
404 | ␉␉io->i_buf = max(iob[i].i_filesize + iob[i].i_buf, io->i_buf);␊ |
405 | ␉}␊ |
406 | ␉␊ |
407 | ␉// Load entire file into memory. Unnecessary open() calls must be avoided.␊ |
408 | ␉//gFSLoadAddress = io->i_buf;␊ |
409 | ␉safe_set_env(envgFSLoadAddress, (uint32_t)(void *)io->i_buf);␊ |
410 | ␊ |
411 | ␉io->i_filesize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
412 | ␉if (io->i_filesize < 0) {␊ |
413 | ␉␉close(fdesc);␊ |
414 | ␉␉return -1;␊ |
415 | ␉}␊ |
416 | ␉return fdesc;␊ |
417 | }␊ |
418 | ␊ |
419 | ␊ |
420 | int open(const char *path)␊ |
421 | {␊ |
422 | ␉const char␉*filepath;␊ |
423 | ␉BVRef␉␉bvr;␊ |
424 | ␉␊ |
425 | ␉// Resolve the boot volume from the file spec.␊ |
426 | ␉if ((bvr = getBootVolumeRef(path, &filepath)) != NULL) {␊ |
427 | ␊ |
428 | return open_bvr(bvr, filepath);␊ |
429 | ␉}␊ |
430 | ␉return -1;␊ |
431 | }␊ |
432 | ␊ |
433 | ␊ |
434 | int open_bvdev(const char *bvd, const char *path)␊ |
435 | {␊ |
436 | ␉const struct devsw␉*dp;␊ |
437 | ␉const char␉␉*cp;␊ |
438 | ␉BVRef␉␉␉bvr;␊ |
439 | ␉int␉␉␉i;␊ |
440 | ␉int␉␉␉len;␊ |
441 | ␉int␉␉␉unit;␊ |
442 | ␉int␉␉␉partition;␊ |
443 | ␉␊ |
444 | ␉if ((i = open(path)) >= 0) {␊ |
445 | ␉␉return i;␊ |
446 | ␉}␊ |
447 | ␉␊ |
448 | ␉if (bvd == NULL || (len = strlen(bvd)) < 2) {␊ |
449 | ␉␉return -1;␊ |
450 | ␉}␊ |
451 | ␉␊ |
452 | ␉for (dp=devsw; dp->name; dp++) {␊ |
453 | ␉␉if (bvd[0] == dp->name[0] && bvd[1] == dp->name[1]) {␊ |
454 | ␉␉␉unit = 0;␊ |
455 | ␉␉␉partition = 0;␊ |
456 | ␉␉␉/* get optional unit and partition */␊ |
457 | ␉␉␉if (len >= 5 && bvd[2] == '(') { /* min must be present xx(0) */␊ |
458 | ␉␉␉␉cp = &bvd[3];␊ |
459 | ␉␉␉␉i = 0;␊ |
460 | ␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
461 | ␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
462 | ␉␉␉␉␉unit = i;␊ |
463 | ␉␉␉␉}␊ |
464 | ␉␉␉␉if (*cp++ == ',') {␊ |
465 | ␉␉␉␉␉i = 0;␊ |
466 | ␉␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
467 | ␉␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
468 | ␉␉␉␉␉␉partition = i;␊ |
469 | ␉␉␉␉␉}␊ |
470 | ␉␉␉␉}␊ |
471 | ␉␉␉}␊ |
472 | ␉␉␉bvr = newBootVolumeRef(dp->biosdev + unit, partition);␊ |
473 | ␊ |
474 | return open_bvr(bvr, path);␊ |
475 | ␉␉}␊ |
476 | ␉}␊ |
477 | ␉return -1;␊ |
478 | }␊ |
479 | ␊ |
480 | //==========================================================================␊ |
481 | // close() - Close a file descriptor.␊ |
482 | ␊ |
483 | int close(int fdesc)␊ |
484 | {␊ |
485 | struct iob * io;␊ |
486 | ␉␊ |
487 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
488 | return (-1);␊ |
489 | ␉␊ |
490 | io->i_flgs = 0;␊ |
491 | ␉␊ |
492 | return 0;␊ |
493 | }␊ |
494 | ␊ |
495 | //==========================================================================␊ |
496 | // read() - Read up to 'count' bytes of data from the file descriptor␊ |
497 | // into the buffer pointed to by buf.␊ |
498 | ␊ |
499 | int read(int fdesc, char * buf, int count)␊ |
500 | {␊ |
501 | struct iob * io;␊ |
502 | ␊ |
503 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
504 | return (-1);␊ |
505 | ␉␊ |
506 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
507 | count = io->i_filesize - io->i_offset;␊ |
508 | ␉␊ |
509 | if (count <= 0)␊ |
510 | return 0; // end of file␊ |
511 | ␉␊ |
512 | bcopy(io->i_buf + io->i_offset, buf, count);␊ |
513 | ␉␊ |
514 | io->i_offset += count;␊ |
515 | ␉␊ |
516 | return count;␊ |
517 | }␊ |
518 | ␊ |
519 | //==========================================================================␊ |
520 | // file_size() - Returns the size of the file described by the file␊ |
521 | // descriptor.␊ |
522 | ␊ |
523 | int file_size(int fdesc)␊ |
524 | {␊ |
525 | struct iob * io;␊ |
526 | ␉␊ |
527 | if ((io = iob_from_fdesc(fdesc)) == 0)␊ |
528 | return 0;␊ |
529 | ␉␊ |
530 | return io->i_filesize;␊ |
531 | }␊ |
532 | ␊ |
533 | #if UNUSED␊ |
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 | long GetFSUUID(char *spec, char *uuidStr)␊ |
586 | {␊ |
587 | BVRef bvr;␊ |
588 | long rval = -1;␊ |
589 | const char *devSpec;␊ |
590 | ␉␊ |
591 | if ((bvr = getBootVolumeRef(spec, &devSpec)) == NULL)␊ |
592 | return -1;␊ |
593 | ␉␊ |
594 | if(bvr->fs_getuuid)␊ |
595 | rval = bvr->fs_getuuid(bvr, uuidStr);␊ |
596 | ␉␊ |
597 | return rval;␊ |
598 | }␊ |
599 | ␊ |
600 | long GetFileBlock(const char *fileSpec, unsigned long long *firstBlock)␊ |
601 | {␊ |
602 | const char * filePath;␊ |
603 | BVRef bvr;␊ |
604 | ␉␊ |
605 | // Resolve the boot volume from the file spec.␊ |
606 | ␉␊ |
607 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL) {␊ |
608 | printf("Boot volume for '%s' is bogus\n", fileSpec);␊ |
609 | return -1;␊ |
610 | }␊ |
611 | ␉␊ |
612 | return bvr->fs_getfileblock(bvr, (char *)filePath, firstBlock);␊ |
613 | }␊ |
614 | ␊ |
615 | //==========================================================================␊ |
616 | // openmem()␊ |
617 | ␊ |
618 | int openmem(char * buf, int len)␊ |
619 | {␊ |
620 | int fdesc;␊ |
621 | struct iob * io;␊ |
622 | ␉␊ |
623 | fdesc = GetFreeFd();␊ |
624 | io = &iob[fdesc];␊ |
625 | bzero(io, sizeof(*io));␊ |
626 | ␉␊ |
627 | // Mark the descriptor as taken. Set the F_MEM flag to indicate␊ |
628 | // that the file buffer is provided by the caller.␊ |
629 | ␉␊ |
630 | io->i_flgs = F_ALLOC | F_MEM;␊ |
631 | io->i_buf = buf;␊ |
632 | io->i_filesize = len;␊ |
633 | ␉␊ |
634 | return fdesc;␊ |
635 | }␊ |
636 | ␊ |
637 | //==========================================================================␊ |
638 | // lseek() - Reposition the byte offset of the file descriptor from the␊ |
639 | // beginning of the file. Returns the relocated offset.␊ |
640 | ␊ |
641 | int b_lseek(int fdesc, int offset, int ptr)␊ |
642 | {␊ |
643 | struct iob * io;␊ |
644 | ␉␊ |
645 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
646 | return (-1);␊ |
647 | ␉␊ |
648 | io->i_offset = offset;␊ |
649 | ␉␊ |
650 | return offset;␊ |
651 | }␊ |
652 | ␊ |
653 | //==========================================================================␊ |
654 | // tell() - Returns the byte offset of the file descriptor.␊ |
655 | ␊ |
656 | int tell(int fdesc)␊ |
657 | {␊ |
658 | struct iob * io;␊ |
659 | ␉␊ |
660 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
661 | return 0;␊ |
662 | ␉␊ |
663 | return io->i_offset;␊ |
664 | }␊ |
665 | #endif␊ |
666 | //==========================================================================␊ |
667 | // write() - Write up to 'count' bytes of data to the file descriptor␊ |
668 | // from the buffer pointed to by buf.␊ |
669 | ␊ |
670 | int write(int fdesc, const char * buf, int count)␊ |
671 | {␊ |
672 | struct iob * io;␊ |
673 | ␊ |
674 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
675 | return (-1);␊ |
676 | ␉␊ |
677 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
678 | count = io->i_filesize - io->i_offset;␊ |
679 | ␉␊ |
680 | if (count <= 0)␊ |
681 | return 0; // end of file␊ |
682 | ␉␊ |
683 | bcopy(buf, io->i_buf + io->i_offset, count);␊ |
684 | ␉␊ |
685 | io->i_offset += count;␊ |
686 | ␉␊ |
687 | return count;␊ |
688 | }␊ |
689 | #if UNUSED␊ |
690 | int writebyte(int fdesc, char value)␊ |
691 | {␊ |
692 | struct iob * io;␊ |
693 | ␊ |
694 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
695 | return (-1);␊ |
696 | ␉␊ |
697 | if ((io->i_offset + 1) > (unsigned int)io->i_filesize)␊ |
698 | return 0; // end of file␊ |
699 | ␉␊ |
700 | io->i_buf[io->i_offset++] = value;␊ |
701 | ␉␊ |
702 | return 1;␊ |
703 | }␊ |
704 | ␊ |
705 | int writeint(int fdesc, int value)␊ |
706 | {␊ |
707 | struct iob * io;␊ |
708 | ␊ |
709 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
710 | return (-1);␊ |
711 | ␉␊ |
712 | if ((io->i_offset + 4) > (unsigned int)io->i_filesize)␊ |
713 | return 0; // end of file␊ |
714 | ␉␊ |
715 | bcopy(&value, io->i_buf + io->i_offset, 4);␊ |
716 | ␉␊ |
717 | io->i_offset += 4;␊ |
718 | ␉␊ |
719 | return 4;␊ |
720 | }␊ |
721 | //==========================================================================␊ |
722 | ␊ |
723 | struct dirstuff * vol_opendir(BVRef bvr, const char * path)␊ |
724 | {␊ |
725 | struct dirstuff * dirp = 0;␊ |
726 | ␉␊ |
727 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
728 | if (dirp == NULL)␊ |
729 | goto error;␊ |
730 | ␉␊ |
731 | dirp->dir_path = newString(path);␊ |
732 | if (dirp->dir_path == NULL)␊ |
733 | goto error;␊ |
734 | ␉␊ |
735 | dirp->dir_bvr = bvr;␊ |
736 | ␉␊ |
737 | return dirp;␊ |
738 | ␉␊ |
739 | error:␊ |
740 | closedir(dirp);␊ |
741 | return NULL;␊ |
742 | }␊ |
743 | ␊ |
744 | //==========================================================================␊ |
745 | ␊ |
746 | int readdir_ext(struct dirstuff * dirp, const char ** name, long * flags,␊ |
747 | ␉␉␉␉long * time, FinderInfo *finderInfo, long *infoValid)␊ |
748 | {␊ |
749 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
750 | ␉␉␉␉␉␉␉␉␉␉ /* dirPath */ dirp->dir_path,␊ |
751 | ␉␉␉␉␉␉␉␉␉␉ /* dirIndex */ &dirp->dir_index,␊ |
752 | ␉␉␉␉␉␉␉␉␉␉ /* dirEntry */ (char **)name,␊ |
753 | ␉␉␉␉␉␉␉␉␉␉ flags, time,␊ |
754 | ␉␉␉␉␉␉␉␉␉␉ finderInfo, infoValid);␊ |
755 | }␊ |
756 | //==========================================================================␊ |
757 | ␊ |
758 | const char * systemConfigDir()␊ |
759 | {␊ |
760 | if (get_env(envgBootFileType) == kNetworkDeviceType)␊ |
761 | ␉␉return "";␊ |
762 | return "/Library/Preferences/SystemConfiguration";␊ |
763 | }␊ |
764 | ␊ |
765 | #endif␊ |
766 | ␊ |
767 | //==========================================================================␊ |
768 | ␊ |
769 | void scanBootVolumes( int biosdev, int * count )␊ |
770 | {␊ |
771 | ␉BVRef bvr = 0;␊ |
772 | ␉␊ |
773 | ␉bvr = diskScanBootVolumes(biosdev, count);␊ |
774 | ␉if (bvr == NULL)␊ |
775 | ␉{␊ |
776 | #ifdef NBP_SUPPORT␊ |
777 | ␉␉bvr = nbpScanBootVolumes(biosdev, count);␊ |
778 | ␉␉if (bvr != NULL)␊ |
779 | ␉␉{␊ |
780 | ␉␉␉safe_set_env(envgBootFileType, kNetworkDeviceType);␊ |
781 | ␉␉}␊ |
782 | #endif␊ |
783 | ␉}␊ |
784 | ␉else␊ |
785 | ␉{␊ |
786 | ␉␉safe_set_env(envgBootFileType, kBlockDeviceType);␊ |
787 | ␊ |
788 | ␉}␊ |
789 | }␊ |
790 | ␊ |
791 | //==========================================================================␊ |
792 | ␊ |
793 | void scanDisks(void)␊ |
794 | {␊ |
795 | #define MAX_HDD_COUNT 32␊ |
796 | ␉int bvCount;␊ |
797 | ␉int hd = 0;␊ |
798 | ␉␊ |
799 | ␉// Testing up to MAX_HDD_COUNT hard drives.␊ |
800 | ␉while(!testBiosread(0x80 + hd, 0) && hd < MAX_HDD_COUNT)␊ |
801 | ␉{␊ |
802 | ␉␉bvCount = 0;␊ |
803 | ␉␉scanBootVolumes(0x80 + hd, &bvCount);␊ |
804 | ␉␉hd++;␊ |
805 | ␉}␊ |
806 | ␉int gBIOSDev = (int)get_env(envgBIOSDev);␊ |
807 | ␉// Also scanning CD/DVD drive.␊ |
808 | ␉if (biosDevIsCDROM(gBIOSDev))␊ |
809 | ␉{␊ |
810 | ␉␉bvCount = 0;␊ |
811 | ␉␉scanBootVolumes(gBIOSDev, &bvCount);␊ |
812 | ␉}␊ |
813 | }␊ |
814 | ␊ |
815 | //==========================================================================␊ |
816 | ␊ |
817 | BVRef selectBootVolume( BVRef chain )␊ |
818 | {␊ |
819 | ␉bool filteredChain = false;␊ |
820 | ␉bool foundPrimary = false;␊ |
821 | ␉BVRef bvr, bvr1 = 0, bvr2 = 0;␊ |
822 | ␉␊ |
823 | ␉if (chain->filtered) filteredChain = true;␊ |
824 | ␉␊ |
825 | ␉int gBIOSDev = (int)get_env(envgBIOSDev);␊ |
826 | ␊ |
827 | #if UNUSED␊ |
828 | ␉if (multiboot_partition_set)␊ |
829 | ␉␉for (bvr = chain; bvr < (BVRef)ULONG_MAX; bvr = bvr->next) {␊ |
830 | if (!bvr) {␊ |
831 | break;␊ |
832 | }␊ |
833 | ␉␉␉if ( bvr->part_no == multiboot_partition && bvr->biosdev == gBIOSDev ) ␊ |
834 | ␉␉␉␉return bvr;␊ |
835 | }␊ |
836 | #endif␊ |
837 | ␉/*␊ |
838 | ␉ * Checking "Default Partition" key in system configuration - use format: hd(x,y), the volume UUID or label -␊ |
839 | ␉ * to override the default selection.␊ |
840 | ␉ * We accept only kBVFlagSystemVolume or kBVFlagForeignBoot volumes.␊ |
841 | ␉ */␊ |
842 | ␉char *val = XMLDecode(getStringForKey(kDefaultPartition, DEFAULT_BOOT_CONFIG));␊ |
843 | if (val) {␊ |
844 | for (bvr = chain; bvr < (BVRef)ULONG_MAX; bvr = bvr->next) ␊ |
845 | {␊ |
846 | if (!bvr) {␊ |
847 | break;␊ |
848 | }␊ |
849 | if (matchVolumeToString(bvr, val, false)) {␊ |
850 | free(val);␊ |
851 | return bvr;␊ |
852 | }␊ |
853 | }␊ |
854 | free(val);␊ |
855 | }␊ |
856 | ␉␊ |
857 | ␉/*␊ |
858 | ␉ * Scannig the volume chain backwards and trying to find ␊ |
859 | ␉ * a HFS+ volume with valid boot record signature.␊ |
860 | ␉ * If not found any active partition then we will␊ |
861 | ␉ * select this volume as the boot volume.␊ |
862 | ␉ */␊ |
863 | ␉␊ |
864 | ␉{ ␊ |
865 | for (bvr = chain; bvr < (BVRef)ULONG_MAX; bvr = bvr->next)␊ |
866 | {␊ |
867 | if (!bvr) {␊ |
868 | break;␊ |
869 | }␊ |
870 | #if UNUSED␊ |
871 | ␉␉␉if (multiboot_skip_partition_set) {␊ |
872 | ␉␉␉␉if (bvr->part_no == multiboot_skip_partition) continue;␊ |
873 | ␉␉␉}␊ |
874 | #endif␊ |
875 | ␉␉␉if ( (bvr->flags & kBVFlagPrimary) && (bvr->biosdev == gBIOSDev) ) foundPrimary = true;␊ |
876 | ␉␉␉// zhell -- Undo a regression that was introduced from r491 to 492.␊ |
877 | ␉␉␉// if gBIOSBootVolume is set already, no change is required␊ |
878 | ␉␉␉if ( (bvr->flags & (kBVFlagBootable|kBVFlagSystemVolume))␊ |
879 | ␉␉␉␉&& get_env(envgBIOSBootVolume)␊ |
880 | ␉␉␉␉&& (!filteredChain || (filteredChain && bvr->visible))␊ |
881 | ␉␉␉␉&& (bvr->biosdev == gBIOSDev) )␊ |
882 | ␉␉␉{␊ |
883 | ␉␉␉␉bvr2 = bvr;␉␉␉␉␊ |
884 | ␉␉␉}␊ |
885 | ␊ |
886 | ␉␉␉// zhell -- if gBIOSBootVolume is NOT set, we use the "if" statement␊ |
887 | ␉␉␉// from r491,␊ |
888 | ␉␉␉if ( bvr->flags & kBVFlagBootable␊ |
889 | ␉␉␉␉&& !get_env(envgBIOSBootVolume)/*gBIOSBootVolume*/␊ |
890 | ␉␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
891 | ␉␉␉{␊ |
892 | ␉␉␉␉bvr2 = bvr;␉␉␉␉␊ |
893 | ␉␉␉}␊ |
894 | }␊ |
895 | ␉}␊ |
896 | ␊ |
897 | ␉/*␊ |
898 | ␉ * Use the standrad method for selecting the boot volume.␊ |
899 | ␉ */␊ |
900 | ␉if (foundPrimary)␊ |
901 | ␉{␊ |
902 | ␉␉for (bvr = chain; bvr < (BVRef)ULONG_MAX; bvr = bvr->next)␊ |
903 | {␊ |
904 | if (!bvr) {␊ |
905 | break;␊ |
906 | }␊ |
907 | ␉␉␉if ( bvr->flags & kBVFlagNativeBoot && bvr->biosdev == gBIOSDev ) bvr1 = bvr;␊ |
908 | ␉␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) bvr2 = bvr;␊ |
909 | ␉␉}␊ |
910 | ␉}␊ |
911 | ␉␊ |
912 | ␉bvr = bvr2 ? bvr2 :␊ |
913 | ␉bvr1 ? bvr1 : chain;␊ |
914 | ␉␊ |
915 | ␉return bvr;␊ |
916 | }␊ |
917 | ␊ |
918 | //==========================================================================␊ |
919 | ␊ |
920 | #define LP '('␊ |
921 | #define RP ')'␊ |
922 | ␊ |
923 | /*!␊ |
924 | This is like boot2's gBootVolume except it is for the internal use of␊ |
925 | libsaio to track which volume an unqualified path should be relative to.␊ |
926 | This replaces bootInfo->kernDev as the carrier of this information.␊ |
927 | */␊ |
928 | static BVRef gRootVolume;␊ |
929 | ␊ |
930 | void setRootVolume(BVRef volume)␊ |
931 | {␊ |
932 | gRootVolume = volume;␊ |
933 | // Veto non-native FS. Basically that means don't allow the root volume to␊ |
934 | // be set to a volume we can't read files from.␊ |
935 | if(gRootVolume != NULL && ((gRootVolume->flags & kBVFlagNativeBoot) == 0))␊ |
936 | gRootVolume = NULL;␊ |
937 | }␊ |
938 | ␊ |
939 | void setBootGlobals(BVRef chain)␊ |
940 | {␊ |
941 | ␉// Record default boot device.␊ |
942 | ␉BVRef gBootVolume = selectBootVolume(chain);␊ |
943 | ␉␊ |
944 | ␉// turbo - Save the ORIGINAL boot volume too for loading our mkext␊ |
945 | ␉if (!get_env(envgBIOSBootVolume)) safe_set_env(envgBIOSBootVolume, (uint32_t)gBootVolume);␊ |
946 | ␊ |
947 | ␉safe_set_env(envgBootVolume, (uint32_t)gBootVolume);␊ |
948 | ␉setRootVolume(gBootVolume);␉␊ |
949 | }␊ |
950 | ␊ |
951 | /*!␊ |
952 | Extracts the volume selector from the pathname, returns the selected␊ |
953 | BVRef, and sets *outPath to the remainder of the path.␊ |
954 | If the path did not include a volume selector then the current volume␊ |
955 | is used. When called with a volume selector the current volume␊ |
956 | is changed to the selected volume unless the volume selector is␊ |
957 | that of a ramdisk.␊ |
958 | */␊ |
959 | BVRef getBootVolumeRef( const char * path, const char ** outPath )␊ |
960 | {␊ |
961 | const char * cp;␊ |
962 | BVRef bvr = gRootVolume;␊ |
963 | //int biosdev = (int)get_env(envgBIOSDev);␊ |
964 | ␉␊ |
965 | // Search for left parenthesis in the path specification.␊ |
966 | ␉␊ |
967 | for (cp = path; *cp; cp++) {␊ |
968 | if (*cp == LP || *cp == '/') break;␊ |
969 | }␊ |
970 | ␉␊ |
971 | if (*cp != LP) // no left paren found␊ |
972 | {␊ |
973 | // Path is using the implicit current device so if there is␊ |
974 | // no current device, then we must fail.␊ |
975 | cp = path;␊ |
976 | if ( gRootVolume == NULL )␊ |
977 | return NULL;␊ |
978 | }␊ |
979 | else if ((cp - path) == 2) // found "xx("␊ |
980 | {␊ |
981 | const struct devsw * dp;␊ |
982 | const char * xp = path;␊ |
983 | int i;␊ |
984 | int unit = -1;␊ |
985 | int part = -1;␊ |
986 | ␉␉␊ |
987 | cp++;␊ |
988 | ␉␉␊ |
989 | // Check the 2 character device name pointed by 'xp'.␊ |
990 | ␉␉␊ |
991 | for (dp = devsw; dp->name; dp++)␊ |
992 | {␊ |
993 | if ((xp[0] == dp->name[0]) && (xp[1] == dp->name[1]))␊ |
994 | break; // found matching entry␊ |
995 | }␊ |
996 | if (dp->name == NULL)␊ |
997 | {␊ |
998 | error("Unknown device '%c%c'\n", xp[0], xp[1]);␊ |
999 | return NULL;␊ |
1000 | }␊ |
1001 | ␊ |
1002 | // Extract the optional unit number from the specification.␊ |
1003 | // hd(unit) or hd(unit, part).␊ |
1004 | ␉␉␊ |
1005 | i = 0;␊ |
1006 | while (*cp >= '0' && *cp <= '9')␊ |
1007 | {␊ |
1008 | i = i * 10 + *cp++ - '0';␊ |
1009 | unit = i;␊ |
1010 | }␊ |
1011 | ␉␉␊ |
1012 | // Unit is no longer optional and never really was.␊ |
1013 | // If the user failed to specify it then the unit number from the previous kernDev␊ |
1014 | // would have been used which makes little sense anyway.␊ |
1015 | // For example, if the user did fd()/foobar and the current root device was the␊ |
1016 | // second hard disk (i.e. unit 1) then fd() would select the second floppy drive!␊ |
1017 | if(unit == -1)␊ |
1018 | return NULL;␊ |
1019 | ␉␉␊ |
1020 | // Extract the optional partition number from the specification.␊ |
1021 | ␉␉␊ |
1022 | if (*cp == ',')␊ |
1023 | part = atoi(++cp);␊ |
1024 | ␉␉␊ |
1025 | // If part is not specified part will be -1 whereas before it would have been␊ |
1026 | // whatever the last partition was which makes about zero sense if the device␊ |
1027 | // has been switched.␊ |
1028 | ␉␉␊ |
1029 | // Skip past the right paren.␊ |
1030 | ␉␉␊ |
1031 | for ( ; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1032 | if (*cp == RP) cp++;␊ |
1033 | ␊ |
1034 | int biosdev = dp->biosdev + unit;␊ |
1035 | bvr = newBootVolumeRef(biosdev, part);␊ |
1036 | ␉␉␊ |
1037 | if(bvr == NULL)␊ |
1038 | return NULL;␊ |
1039 | }␊ |
1040 | else␊ |
1041 | {␊ |
1042 | // Bad device specifier, skip past the right paren.␊ |
1043 | ␉␉␊ |
1044 | for ( cp++; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1045 | if (*cp == RP) cp++;␊ |
1046 | // If gRootVolume was NULL, then bvr will be NULL as well which␊ |
1047 | // should be caught by the caller.␊ |
1048 | }␊ |
1049 | ␉␊ |
1050 | // Returns the file path following the device spec.␊ |
1051 | // e.g. 'hd(1,b)mach_kernel' is reduced to 'mach_kernel'.␊ |
1052 | ␉␊ |
1053 | *outPath = cp;␊ |
1054 | ␉␊ |
1055 | return bvr;␊ |
1056 | }␊ |
1057 | ␊ |
1058 | //==========================================================================␊ |
1059 | // Function name is a misnomer as scanBootVolumes usually calls diskScanBootVolumes␊ |
1060 | // which caches the information. So it's only allocated on the first run.␊ |
1061 | static BVRef newBootVolumeRef( int biosdev, int partno )␊ |
1062 | {␊ |
1063 | ␉BVRef bvr, bvr1, bvrChain;␊ |
1064 | ␉␊ |
1065 | ␉bvr = bvr1 = NULL;␊ |
1066 | ␉␊ |
1067 | // Try resolving "rd" and "bt" devices first.␊ |
1068 | ␉execute_hook("newRamDisk_BVR", &biosdev, &bvr1, NULL, NULL, NULL, NULL);␊ |
1069 | ␉␊ |
1070 | // Try resolving "rd" and "bt" devices first.␊ |
1071 | ␉␊ |
1072 | ␉if (biosdev == kPseudoBIOSDevBooter)␊ |
1073 | ␉{␊ |
1074 | ␉␉if (bvr1 == NULL )␊ |
1075 | ␉␉␉bvr1 = (BVRef)(uint32_t)get_env(envgBIOSBootVolume);␊ |
1076 | ␉}␊ |
1077 | ␉else␊ |
1078 | ␉{␊ |
1079 | ␉␉// Fetch the volume list from the device.␊ |
1080 | ␉␉␊ |
1081 | ␉␉scanBootVolumes( biosdev, NULL );␊ |
1082 | ␉␉bvrChain = getBVChainForBIOSDev(biosdev);␊ |
1083 | ␉␉␊ |
1084 | ␉␉// Look for a perfect match based on device and partition number.␊ |
1085 | ␉␉␊ |
1086 | ␉␉for ( bvr1 = NULL, bvr = bvrChain; bvr; bvr = bvr->next )␊ |
1087 | ␉␉{␊ |
1088 | ␉␉␉if ( ( bvr->flags & kBVFlagNativeBoot ) == 0 ) continue;␊ |
1089 | ␉␉␉␊ |
1090 | ␉␉␉bvr1 = bvr;␊ |
1091 | ␉␉␉if ( bvr->part_no == partno ) break;␊ |
1092 | ␉␉}␊ |
1093 | ␉}␊ |
1094 | ␉␊ |
1095 | ␉return bvr ? bvr : bvr1;␊ |
1096 | }␊ |
1097 | ␊ |
1098 | //==========================================================================␊ |
1099 | // getDeviceDescription() - Extracts unit number and partition number␊ |
1100 | // from bvr structure into "dw(u,p)" format.␊ |
1101 | // Returns length of the out string␊ |
1102 | int getDeviceDescription(BVRef bvr, char *str)␊ |
1103 | {␊ |
1104 | if(!str)␊ |
1105 | return 0;␊ |
1106 | ␊ |
1107 | ␉*str = '\0';␊ |
1108 | ␉␊ |
1109 | ␉if (bvr)␊ |
1110 | ␉{␊ |
1111 | const struct devsw *dp = devsw;␊ |
1112 | ␉␉while(dp->name && bvr->biosdev >= dp->biosdev)␊ |
1113 | dp++;␊ |
1114 | ␊ |
1115 | ␉␉dp--;␊ |
1116 | ␉␉if (dp->name)␊ |
1117 | return sprintf(str, "%s(%d,%d)", dp->name, bvr->biosdev - dp->biosdev, bvr->part_no);␊ |
1118 | ␉}␊ |
1119 | ␉␊ |
1120 | ␉return 0;␊ |
1121 | }␊ |
1122 | |