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 | /*␊ |
58 | * Copyright 2007 VMware Inc.␊ |
59 | * "Preboot" ramdisk support added by David Elliott␊ |
60 | */␊ |
61 | ␊ |
62 | #include <AvailabilityMacros.h>␊ |
63 | #include <uuid/uuid.h>␊ |
64 | ␊ |
65 | //#include "libsaio.h"␊ |
66 | //#include "bootstruct.h"␊ |
67 | #include "boot.h"␊ |
68 | #include "disk.h"␊ |
69 | #include "ramdisk.h"␊ |
70 | #include "xml.h"␊ |
71 | ␊ |
72 | #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5␊ |
73 | # include <Kernel/libkern/crypto/md5.h>␊ |
74 | #else␊ |
75 | # include <sys/md5.h>␊ |
76 | #endif␊ |
77 | ␊ |
78 | /* No OS X release has ever included this. */␊ |
79 | #if 0␊ |
80 | #include <Kernel/uuid/namespace.h>␊ |
81 | #else␊ |
82 | /* copied from uuid/namespace.h, just like BootX's fs.c does. */␊ |
83 | UUID_DEFINE( kFSUUIDNamespaceSHA1, 0xB3, 0xE2, 0x0F, 0x39, 0xF2, 0x92, 0x11, 0xD6, 0x97, 0xA4, 0x00, 0x30, 0x65, 0x43, 0xEC, 0xAC );␊ |
84 | #endif␊ |
85 | ␊ |
86 | extern int multiboot_partition;␊ |
87 | extern int multiboot_partition_set;␊ |
88 | ␊ |
89 | struct devsw {␊ |
90 | const char * name;␊ |
91 | // size increased from char to short to handle non-BIOS internal devices␊ |
92 | unsigned short biosdev;␊ |
93 | int type;␊ |
94 | };␊ |
95 | ␊ |
96 | // Device entries must be ordered by bios device numbers. ␊ |
97 | static struct devsw devsw[] =␊ |
98 | {␊ |
99 | { "hd", 0x80, kBIOSDevTypeHardDrive }, /* DEV_HD */␊ |
100 | { "en", 0xE0, kBIOSDevTypeNetwork }, /* DEV_EN */␊ |
101 | { "rd", 0x100, kBIOSDevTypeHardDrive },␊ |
102 | { "bt", 0x101, kBIOSDevTypeHardDrive }, // turbo - type for booter partition␊ |
103 | { 0, 0 }␊ |
104 | };␊ |
105 | ␊ |
106 | // Pseudo BIOS devices␊ |
107 | enum {␊ |
108 | ␉kPseudoBIOSDevRAMDisk = 0x100,␊ |
109 | ␉kPseudoBIOSDevBooter = 0x101␊ |
110 | };␊ |
111 | ␊ |
112 | /*␊ |
113 | * Max number of file descriptors.␊ |
114 | */␊ |
115 | #define NFILES 6␊ |
116 | ␊ |
117 | static struct iob iob[NFILES];␊ |
118 | ␊ |
119 | void * gFSLoadAddress = 0;␊ |
120 | ␊ |
121 | // Turbo - save what we think is our original BIOS boot volume if we have one 0xab␊ |
122 | BVRef gBIOSBootVolume = NULL;␊ |
123 | BVRef gBootVolume;␊ |
124 | ␊ |
125 | //static BVRef getBootVolumeRef( const char * path, const char ** outPath );␊ |
126 | static BVRef newBootVolumeRef( int biosdev, int partno );␊ |
127 | ␊ |
128 | //==========================================================================␊ |
129 | // LoadVolumeFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
130 | // Load the specified file from the specified volume␊ |
131 | // to the load buffer at LOAD_ADDR.␊ |
132 | // If the file is fat, load only the i386 portion.␊ |
133 | ␊ |
134 | long LoadVolumeFile(BVRef bvr, const char *filePath)␊ |
135 | {␊ |
136 | long fileSize;␊ |
137 | ␊ |
138 | // Read file into load buffer. The data in the load buffer will be␊ |
139 | // overwritten by the next LoadFile() call.␊ |
140 | ␊ |
141 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
142 | ␊ |
143 | fileSize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
144 | ␊ |
145 | // Return the size of the file, or -1 if load failed.␊ |
146 | ␊ |
147 | return fileSize;␊ |
148 | }␊ |
149 | ␊ |
150 | //==========================================================================␊ |
151 | // LoadFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
152 | // Load the specified file to the load buffer at LOAD_ADDR.␊ |
153 | // If the file is fat, load only the i386 portion.␊ |
154 | ␊ |
155 | long LoadFile(const char * fileSpec)␊ |
156 | {␊ |
157 | const char * filePath;␊ |
158 | BVRef bvr;␊ |
159 | ␊ |
160 | // Resolve the boot volume from the file spec.␊ |
161 | ␊ |
162 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
163 | return -1;␊ |
164 | ␊ |
165 | return LoadVolumeFile(bvr, filePath);␊ |
166 | }␊ |
167 | ␊ |
168 | long ReadFileAtOffset(const char * fileSpec, void *buffer, uint64_t offset, uint64_t length)␊ |
169 | {␊ |
170 | const char *filePath;␊ |
171 | BVRef bvr;␊ |
172 | ␊ |
173 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
174 | return -1;␊ |
175 | ␊ |
176 | if (bvr->fs_readfile == NULL)␊ |
177 | return -1;␊ |
178 | ␊ |
179 | return bvr->fs_readfile(bvr, (char *)filePath, buffer, offset, length);␊ |
180 | }␊ |
181 | ␊ |
182 | long LoadThinFatFile(const char *fileSpec, void **binary)␊ |
183 | {␊ |
184 | const char *filePath;␊ |
185 | FSReadFile readFile;␊ |
186 | BVRef bvr;␊ |
187 | unsigned long length, length2;␊ |
188 | ␊ |
189 | // Resolve the boot volume from the file spec.␊ |
190 | ␊ |
191 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
192 | return -1;␊ |
193 | ␊ |
194 | *binary = (void *)kLoadAddr;␊ |
195 | ␊ |
196 | // Read file into load buffer. The data in the load buffer will be␊ |
197 | // overwritten by the next LoadFile() call.␊ |
198 | ␊ |
199 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
200 | ␊ |
201 | readFile = bvr->fs_readfile;␊ |
202 | ␊ |
203 | if (readFile != NULL) {␊ |
204 | // Read the first 4096 bytes (fat header)␊ |
205 | length = readFile(bvr, (char *)filePath, *binary, 0, 0x1000);␊ |
206 | if (length > 0) {␊ |
207 | if (ThinFatFile(binary, &length) == 0) {␊ |
208 | ␉␉␉␉if (length == 0)␊ |
209 | ␉␉␉␉␉return 0;␊ |
210 | // We found a fat binary; read only the thin part␊ |
211 | length = readFile(bvr, (char *)filePath,␊ |
212 | (void *)kLoadAddr, (unsigned long)(*binary) - kLoadAddr, length);␊ |
213 | *binary = (void *)kLoadAddr;␊ |
214 | } else {␊ |
215 | // Not a fat binary; read the rest of the file␊ |
216 | length2 = readFile(bvr, (char *)filePath, (void *)(kLoadAddr + length), length, 0);␊ |
217 | if (length2 == -1) return -1;␊ |
218 | length += 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 | #if UNUSED␊ |
232 | long GetFSUUID(char *spec, char *uuidStr)␊ |
233 | {␊ |
234 | BVRef bvr;␊ |
235 | long rval = -1;␊ |
236 | const char *devSpec;␊ |
237 | ␊ |
238 | if ((bvr = getBootVolumeRef(spec, &devSpec)) == NULL)␊ |
239 | return -1;␊ |
240 | ␊ |
241 | if(bvr->fs_getuuid)␊ |
242 | rval = bvr->fs_getuuid(bvr, uuidStr);␊ |
243 | ␊ |
244 | return rval;␊ |
245 | }␊ |
246 | #endif␊ |
247 | ␊ |
248 | // filesystem-specific getUUID functions call this shared string generator␊ |
249 | long CreateUUIDString(uint8_t uubytes[], int nbytes, char *uuidStr)␊ |
250 | {␊ |
251 | unsigned fmtbase, fmtidx, i;␊ |
252 | uint8_t uuidfmt[] = { 4, 2, 2, 2, 6 };␊ |
253 | char *p = uuidStr;␊ |
254 | MD5_CTX md5c;␊ |
255 | uint8_t mdresult[16];␊ |
256 | ␊ |
257 | bzero(mdresult, sizeof(mdresult));␊ |
258 | ␊ |
259 | // just like AppleFileSystemDriver␊ |
260 | MD5Init(&md5c);␊ |
261 | MD5Update(&md5c, kFSUUIDNamespaceSHA1, sizeof(kFSUUIDNamespaceSHA1));␊ |
262 | MD5Update(&md5c, uubytes, nbytes);␊ |
263 | MD5Final(mdresult, &md5c);␊ |
264 | ␊ |
265 | // this UUID has been made version 3 style (i.e. via namespace)␊ |
266 | // see "-uuid-urn-" IETF draft (which otherwise copies byte for byte)␊ |
267 | mdresult[6] = 0x30 | ( mdresult[6] & 0x0F );␊ |
268 | mdresult[8] = 0x80 | ( mdresult[8] & 0x3F );␊ |
269 | ␊ |
270 | ␊ |
271 | // generate the text: e.g. 5EB1869F-C4FA-3502-BDEB-3B8ED5D87292␊ |
272 | i = 0; fmtbase = 0;␊ |
273 | for(fmtidx = 0; fmtidx < sizeof(uuidfmt); fmtidx++) {␊ |
274 | for(i=0; i < uuidfmt[fmtidx]; i++) {␊ |
275 | uint8_t byte = mdresult[fmtbase+i];␊ |
276 | char nib;␊ |
277 | ␊ |
278 | nib = byte >> 4;␊ |
279 | *p = nib + '0'; // 0x4 -> '4'␊ |
280 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
281 | p++;␊ |
282 | ␊ |
283 | nib = byte & 0xf;␊ |
284 | *p = nib + '0'; // 0x4 -> '4'␊ |
285 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
286 | p++;␊ |
287 | ␊ |
288 | }␊ |
289 | fmtbase += i;␊ |
290 | if(fmtidx < sizeof(uuidfmt)-1)␊ |
291 | *(p++) = '-';␊ |
292 | else␊ |
293 | *p = '\0';␊ |
294 | }␊ |
295 | ␊ |
296 | return 0;␊ |
297 | }␊ |
298 | ␊ |
299 | ␊ |
300 | //==========================================================================␊ |
301 | // GetDirEntry - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
302 | // Fetch the next directory entry for the given directory.␊ |
303 | ␊ |
304 | long GetDirEntry(const char * dirSpec, long long * dirIndex, const char ** name, ␊ |
305 | long * flags, long * time)␊ |
306 | {␊ |
307 | const char * dirPath;␊ |
308 | BVRef bvr;␊ |
309 | ␊ |
310 | // Resolve the boot volume from the dir spec.␊ |
311 | ␊ |
312 | if ((bvr = getBootVolumeRef(dirSpec, &dirPath)) == NULL)␊ |
313 | return -1;␊ |
314 | ␊ |
315 | // Return 0 on success, or -1 if there are no additional entries.␊ |
316 | ␊ |
317 | return bvr->fs_getdirentry( bvr,␊ |
318 | /* dirPath */ (char *)dirPath,␊ |
319 | /* dirIndex */ dirIndex,␊ |
320 | /* dirEntry */ (char **)name, flags, time, 0, 0 );␊ |
321 | }␊ |
322 | ␊ |
323 | //==========================================================================␊ |
324 | // GetFileInfo - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
325 | // Get attributes for the specified file.␊ |
326 | ␊ |
327 | static char* gMakeDirSpec;␊ |
328 | ␊ |
329 | long GetFileInfo(const char * dirSpec, const char * name,␊ |
330 | long * flags, long * time)␊ |
331 | {␊ |
332 | long long index = 0;␊ |
333 | const char * entryName;␊ |
334 | ␊ |
335 | if (gMakeDirSpec == 0)␊ |
336 | gMakeDirSpec = (char *)malloc(1024);␊ |
337 | ␊ |
338 | if (!dirSpec) {␊ |
339 | long idx, len;␊ |
340 | ␊ |
341 | len = strlen(name);␊ |
342 | ␊ |
343 | for (idx = len; idx && (name[idx] != '/' && name[idx] != '\\'); idx--) {}␊ |
344 | if (idx == 0) {␊ |
345 | gMakeDirSpec[0] = '/';␊ |
346 | gMakeDirSpec[1] = '\0';␊ |
347 | } else {␊ |
348 | idx++;␊ |
349 | strncpy(gMakeDirSpec, name, idx);␊ |
350 | name += idx;␊ |
351 | }␊ |
352 | dirSpec = gMakeDirSpec;␊ |
353 | }␊ |
354 | ␊ |
355 | while (GetDirEntry(dirSpec, &index, &entryName, flags, time) == 0)␊ |
356 | {␊ |
357 | if (strcmp(entryName, name) == 0)␊ |
358 | return 0; // success␊ |
359 | }␊ |
360 | return -1; // file not found␊ |
361 | }␊ |
362 | ␊ |
363 | long GetFileBlock(const char *fileSpec, unsigned long long *firstBlock)␊ |
364 | {␊ |
365 | const char * filePath;␊ |
366 | BVRef bvr;␊ |
367 | ␊ |
368 | // Resolve the boot volume from the file spec.␊ |
369 | ␊ |
370 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL) {␊ |
371 | printf("Boot volume for '%s' is bogus\n", fileSpec);␊ |
372 | return -1;␊ |
373 | }␊ |
374 | ␊ |
375 | return bvr->fs_getfileblock(bvr, (char *)filePath, firstBlock);␊ |
376 | }␊ |
377 | ␊ |
378 | //==========================================================================␊ |
379 | // GetFreeFD()␊ |
380 | ␊ |
381 | static int GetFreeFd(void)␊ |
382 | {␊ |
383 | ␉int␉fd;␊ |
384 | ␊ |
385 | ␉// Locate a free descriptor slot.␊ |
386 | ␉for (fd = 0; fd < NFILES; fd++) {␊ |
387 | ␉␉if (iob[fd].i_flgs == 0) {␊ |
388 | ␉␉␉return fd;␊ |
389 | ␉ ␉}␊ |
390 | ␉}␊ |
391 | ␉stop("Out of file descriptors");␊ |
392 | ␉// not reached␊ |
393 | ␉return -1;␊ |
394 | }␊ |
395 | ␊ |
396 | //==========================================================================␊ |
397 | // iob_from_fdesc()␊ |
398 | //␊ |
399 | // Return a pointer to an allocated 'iob' based on the file descriptor␊ |
400 | // provided. Returns NULL if the file descriptor given is invalid.␊ |
401 | ␊ |
402 | static struct iob * iob_from_fdesc(int fdesc)␊ |
403 | {␊ |
404 | register struct iob * io;␊ |
405 | ␊ |
406 | if (fdesc < 0 || fdesc >= NFILES ||␊ |
407 | ((io = &iob[fdesc])->i_flgs & F_ALLOC) == 0)␊ |
408 | return NULL;␊ |
409 | else␊ |
410 | return io;␊ |
411 | }␊ |
412 | ␊ |
413 | //==========================================================================␊ |
414 | // openmem()␊ |
415 | ␊ |
416 | int openmem(char * buf, int len)␊ |
417 | {␊ |
418 | int fdesc;␊ |
419 | struct iob * io;␊ |
420 | ␊ |
421 | fdesc = GetFreeFd();␊ |
422 | io = &iob[fdesc];␊ |
423 | bzero(io, sizeof(*io));␊ |
424 | ␊ |
425 | // Mark the descriptor as taken. Set the F_MEM flag to indicate␊ |
426 | // that the file buffer is provided by the caller.␊ |
427 | ␊ |
428 | io->i_flgs = F_ALLOC | F_MEM;␊ |
429 | io->i_buf = buf;␊ |
430 | io->i_filesize = len;␊ |
431 | ␊ |
432 | return fdesc;␊ |
433 | }␊ |
434 | ␊ |
435 | //==========================================================================␊ |
436 | // open() - Open the file specified by 'path' for reading.␊ |
437 | ␊ |
438 | static int open_bvr(BVRef bvr, const char *filePath, int flags)␊ |
439 | {␊ |
440 | ␉struct iob␉*io;␊ |
441 | ␉int␉␉fdesc;␊ |
442 | ␉int␉␉i;␊ |
443 | ␊ |
444 | ␉if (bvr == NULL) {␊ |
445 | ␉␉return -1;␊ |
446 | ␉}␊ |
447 | ␊ |
448 | ␉fdesc = GetFreeFd();␊ |
449 | ␉io = &iob[fdesc];␊ |
450 | ␉bzero(io, sizeof(*io));␊ |
451 | ␊ |
452 | ␉// Mark the descriptor as taken.␊ |
453 | ␉io->i_flgs = F_ALLOC;␊ |
454 | ␊ |
455 | ␉// Find the next available memory block in the download buffer.␊ |
456 | ␉io->i_buf = (char *) LOAD_ADDR;␊ |
457 | ␉for (i = 0; i < NFILES; i++) {␊ |
458 | ␉␉if ((iob[i].i_flgs != F_ALLOC) || (i == fdesc)) {␊ |
459 | ␉␉␉continue;␊ |
460 | ␉␉}␊ |
461 | ␉␉io->i_buf = MAX(iob[i].i_filesize + iob[i].i_buf, io->i_buf);␊ |
462 | ␉}␊ |
463 | ␊ |
464 | ␉// Load entire file into memory. Unnecessary open() calls must be avoided.␊ |
465 | ␉gFSLoadAddress = io->i_buf;␊ |
466 | ␉io->i_filesize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
467 | ␉if (io->i_filesize < 0) {␊ |
468 | ␉␉close(fdesc);␊ |
469 | ␉␉return -1;␊ |
470 | ␉}␊ |
471 | ␉return fdesc;␊ |
472 | }␊ |
473 | ␊ |
474 | int open(const char *path, int flags)␊ |
475 | {␊ |
476 | ␉const char␉*filepath;␊ |
477 | ␉BVRef␉␉bvr;␊ |
478 | ␊ |
479 | ␉// Resolve the boot volume from the file spec.␊ |
480 | ␉if ((bvr = getBootVolumeRef(path, &filepath)) != NULL) {␊ |
481 | ␉␉return open_bvr(bvr, filepath, flags);␊ |
482 | ␉}␊ |
483 | ␉return -1;␊ |
484 | }␊ |
485 | ␊ |
486 | int open_bvdev(const char *bvd, const char *path, int flags)␊ |
487 | {␊ |
488 | const struct devsw␉*dp;␊ |
489 | ␉const char␉␉*cp;␊ |
490 | ␉BVRef␉␉␉bvr;␊ |
491 | ␉int␉␉␉i;␊ |
492 | ␉int␉␉␉len;␊ |
493 | ␉int␉␉␉unit;␊ |
494 | ␉int␉␉␉partition;␊ |
495 | ␊ |
496 | ␉if ((i = open(path, flags)) >= 0) {␊ |
497 | ␉␉return i;␊ |
498 | ␉}␊ |
499 | ␊ |
500 | ␉if (bvd == NULL || (len = strlen(bvd)) < 2) {␊ |
501 | ␉␉return -1;␊ |
502 | ␉}␊ |
503 | ␊ |
504 | ␉for (dp=devsw; dp->name; dp++) {␊ |
505 | ␉␉if (bvd[0] == dp->name[0] && bvd[1] == dp->name[1]) {␊ |
506 | ␉␉␉unit = 0;␊ |
507 | ␉␉␉partition = 0;␊ |
508 | ␉␉␉/* get optional unit and partition */␊ |
509 | ␉␉␉if (len >= 5 && bvd[2] == '(') { /* min must be present xx(0) */␊ |
510 | ␉␉␉␉cp = &bvd[3];␊ |
511 | ␉␉␉␉i = 0;␊ |
512 | ␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
513 | ␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
514 | ␉␉␉␉␉unit = i;␊ |
515 | ␉␉␉␉}␊ |
516 | ␉␉␉␉if (*cp++ == ',') {␊ |
517 | ␉␉␉␉␉i = 0;␊ |
518 | ␉␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
519 | ␉␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
520 | ␉␉␉␉␉␉partition = i;␊ |
521 | ␉␉␉␉␉}␊ |
522 | ␉␉␉␉}␊ |
523 | ␉␉␉}␊ |
524 | ␉␉␉bvr = newBootVolumeRef(dp->biosdev + unit, partition);␊ |
525 | ␉␉␉return open_bvr(bvr, path, flags);␊ |
526 | ␉␉}␊ |
527 | }␊ |
528 | ␉return -1;␊ |
529 | }␊ |
530 | ␊ |
531 | //==========================================================================␊ |
532 | // close() - Close a file descriptor.␊ |
533 | ␊ |
534 | int close(int fdesc)␊ |
535 | {␊ |
536 | struct iob * io;␊ |
537 | ␊ |
538 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
539 | return (-1);␊ |
540 | ␊ |
541 | io->i_flgs = 0;␊ |
542 | ␊ |
543 | return 0;␊ |
544 | }␊ |
545 | ␊ |
546 | //==========================================================================␊ |
547 | // lseek() - Reposition the byte offset of the file descriptor from the␊ |
548 | // beginning of the file. Returns the relocated offset.␊ |
549 | ␊ |
550 | int b_lseek(int fdesc, int offset, int ptr)␊ |
551 | {␊ |
552 | struct iob * io;␊ |
553 | ␊ |
554 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
555 | return (-1);␊ |
556 | ␊ |
557 | io->i_offset = offset;␊ |
558 | ␊ |
559 | return offset;␊ |
560 | }␊ |
561 | ␊ |
562 | //==========================================================================␊ |
563 | // tell() - Returns the byte offset of the file descriptor.␊ |
564 | ␊ |
565 | int tell(int fdesc)␊ |
566 | {␊ |
567 | struct iob * io;␊ |
568 | ␊ |
569 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
570 | return 0;␊ |
571 | ␊ |
572 | return io->i_offset;␊ |
573 | }␊ |
574 | ␊ |
575 | //==========================================================================␊ |
576 | // read() - Read up to 'count' bytes of data from the file descriptor␊ |
577 | // into the buffer pointed to by buf.␊ |
578 | ␊ |
579 | int read(int fdesc, char * buf, int count)␊ |
580 | {␊ |
581 | struct iob * io;␊ |
582 | ␊ |
583 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
584 | return (-1);␊ |
585 | ␊ |
586 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
587 | count = io->i_filesize - io->i_offset;␊ |
588 | ␊ |
589 | if (count <= 0)␊ |
590 | return 0; // end of file␊ |
591 | ␊ |
592 | bcopy(io->i_buf + io->i_offset, buf, count);␊ |
593 | ␊ |
594 | io->i_offset += count;␊ |
595 | ␊ |
596 | return count;␊ |
597 | }␊ |
598 | ␊ |
599 | //==========================================================================␊ |
600 | // write() - Write up to 'count' bytes of data to the file descriptor␊ |
601 | // from the buffer pointed to by buf.␊ |
602 | ␊ |
603 | int write(int fdesc, const char * buf, int count)␊ |
604 | {␊ |
605 | struct iob * io;␊ |
606 | ␊ |
607 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
608 | return (-1);␊ |
609 | ␉␊ |
610 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
611 | count = io->i_filesize - io->i_offset;␊ |
612 | ␉␊ |
613 | if (count <= 0)␊ |
614 | return 0; // end of file␊ |
615 | ␉␊ |
616 | bcopy(buf, io->i_buf + io->i_offset, count);␊ |
617 | ␉␊ |
618 | io->i_offset += count;␊ |
619 | ␉␊ |
620 | return count;␊ |
621 | }␊ |
622 | ␊ |
623 | int writebyte(int fdesc, char value)␊ |
624 | {␊ |
625 | struct iob * io;␊ |
626 | ␊ |
627 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
628 | return (-1);␊ |
629 | ␉␊ |
630 | if ((io->i_offset + 1) > (unsigned int)io->i_filesize)␊ |
631 | return 0; // end of file␊ |
632 | ␉␊ |
633 | io->i_buf[io->i_offset++] = value;␊ |
634 | ␉␊ |
635 | return 1;␊ |
636 | }␊ |
637 | ␊ |
638 | int writeint(int fdesc, int value)␊ |
639 | {␊ |
640 | struct iob * io;␊ |
641 | ␊ |
642 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
643 | return (-1);␊ |
644 | ␉␊ |
645 | if ((io->i_offset + 4) > (unsigned int)io->i_filesize)␊ |
646 | return 0; // end of file␊ |
647 | ␉␊ |
648 | bcopy(&value, io->i_buf + io->i_offset, 4);␊ |
649 | ␉␊ |
650 | io->i_offset += 4;␊ |
651 | ␉␊ |
652 | return 4;␊ |
653 | }␊ |
654 | ␊ |
655 | //==========================================================================␊ |
656 | // file_size() - Returns the size of the file described by the file␊ |
657 | // descriptor.␊ |
658 | ␊ |
659 | int file_size(int fdesc)␊ |
660 | {␊ |
661 | struct iob * io;␊ |
662 | ␊ |
663 | if ((io = iob_from_fdesc(fdesc)) == 0)␊ |
664 | return 0;␊ |
665 | ␊ |
666 | return io->i_filesize;␊ |
667 | }␊ |
668 | ␊ |
669 | //==========================================================================␊ |
670 | ␊ |
671 | struct dirstuff * vol_opendir(BVRef bvr, const char * path)␊ |
672 | {␊ |
673 | struct dirstuff * dirp = 0;␊ |
674 | ␊ |
675 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
676 | if (dirp == NULL)␊ |
677 | goto error;␊ |
678 | ␊ |
679 | dirp->dir_path = newString(path);␊ |
680 | if (dirp->dir_path == NULL)␊ |
681 | goto error;␊ |
682 | ␊ |
683 | dirp->dir_bvr = bvr;␊ |
684 | ␊ |
685 | return dirp;␊ |
686 | ␊ |
687 | error:␊ |
688 | closedir(dirp);␊ |
689 | return NULL;␊ |
690 | }␊ |
691 | ␊ |
692 | //==========================================================================␊ |
693 | ␊ |
694 | struct dirstuff * opendir(const char * path)␊ |
695 | {␊ |
696 | struct dirstuff * dirp = 0;␊ |
697 | const char * dirPath;␊ |
698 | BVRef bvr;␊ |
699 | ␊ |
700 | if ((bvr = getBootVolumeRef(path, &dirPath)) == NULL)␊ |
701 | goto error;␊ |
702 | ␊ |
703 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
704 | if (dirp == NULL)␊ |
705 | goto error;␊ |
706 | ␊ |
707 | dirp->dir_path = newString(dirPath);␊ |
708 | if (dirp->dir_path == NULL)␊ |
709 | goto error;␊ |
710 | ␊ |
711 | dirp->dir_bvr = bvr;␊ |
712 | ␊ |
713 | return dirp;␊ |
714 | ␊ |
715 | error:␊ |
716 | closedir(dirp);␊ |
717 | return NULL;␊ |
718 | }␊ |
719 | ␊ |
720 | //==========================================================================␊ |
721 | ␊ |
722 | int closedir(struct dirstuff * dirp)␊ |
723 | {␊ |
724 | if (dirp) {␊ |
725 | if (dirp->dir_path) free(dirp->dir_path);␊ |
726 | free(dirp);␊ |
727 | }␊ |
728 | return 0;␊ |
729 | }␊ |
730 | ␊ |
731 | //==========================================================================␊ |
732 | ␊ |
733 | int readdir(struct dirstuff * dirp, const char ** name, long * flags,␊ |
734 | long * time)␊ |
735 | {␊ |
736 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
737 | /* dirPath */ dirp->dir_path,␊ |
738 | /* dirIndex */ &dirp->dir_index,␊ |
739 | /* dirEntry */ (char **)name, flags, time,␊ |
740 | 0, 0);␊ |
741 | }␊ |
742 | ␊ |
743 | //==========================================================================␊ |
744 | ␊ |
745 | int readdir_ext(struct dirstuff * dirp, const char ** name, long * flags,␊ |
746 | long * time, FinderInfo *finderInfo, long *infoValid)␊ |
747 | {␊ |
748 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
749 | /* dirPath */ dirp->dir_path,␊ |
750 | /* dirIndex */ &dirp->dir_index,␊ |
751 | /* dirEntry */ (char **)name,␊ |
752 | flags, time,␊ |
753 | finderInfo, infoValid);␊ |
754 | }␊ |
755 | ␊ |
756 | //==========================================================================␊ |
757 | /*␊ |
758 | const char * systemConfigDir() //Azi: boot 132 loadSystemConfig remains.␊ |
759 | {␊ |
760 | if (gBootFileType == kNetworkDeviceType)␊ |
761 | ␉␉return "";␊ |
762 | ␊ |
763 | return "/Library/Preferences/SystemConfiguration";␊ |
764 | }␊ |
765 | */␊ |
766 | //==========================================================================␊ |
767 | ␊ |
768 | int gBootFileType;␊ |
769 | ␊ |
770 | void scanBootVolumes( int biosdev, int * count )␊ |
771 | {␊ |
772 | BVRef bvr = 0;␊ |
773 | ␊ |
774 | bvr = diskScanBootVolumes(biosdev, count);␊ |
775 | if (bvr == NULL)␊ |
776 | {␊ |
777 | bvr = nbpScanBootVolumes(biosdev, count);␊ |
778 | if (bvr != NULL)␊ |
779 | {␊ |
780 | gBootFileType = kNetworkDeviceType;␊ |
781 | }␊ |
782 | }␊ |
783 | else␊ |
784 | {␊ |
785 | gBootFileType = kBlockDeviceType;␊ |
786 | }␊ |
787 | }␊ |
788 | ␊ |
789 | //==========================================================================␊ |
790 | ␊ |
791 | void scanDisks(int biosdev, int *count)␊ |
792 | {␊ |
793 | ␉#define MAX_HDD_COUNT 32␊ |
794 | ␉int bvCount;␊ |
795 | ␉int hd = 0;␊ |
796 | ␉␊ |
797 | ␉// Testing up to MAX_HDD_COUNT hard drives.␊ |
798 | ␉while (!testBiosread(0x80 + hd, 0) && hd < MAX_HDD_COUNT)␊ |
799 | ␉{␊ |
800 | ␉␉bvCount = 0;␊ |
801 | ␉␉scanBootVolumes(0x80 + hd, &bvCount);␊ |
802 | ␉␉hd++;␊ |
803 | ␉}␊ |
804 | ␉␊ |
805 | ␉// Also scanning CD/DVD drive.␊ |
806 | ␉if (biosDevIsCDROM(gBIOSDev))␊ |
807 | ␉{␊ |
808 | ␉␉bvCount = 0;␊ |
809 | ␉␉scanBootVolumes(gBIOSDev, &bvCount);␊ |
810 | ␉}␊ |
811 | }␊ |
812 | ␊ |
813 | //==========================================================================␊ |
814 | ␊ |
815 | BVRef selectBootVolume( BVRef chain ) //Azi: return default boot volume.␊ |
816 | {␊ |
817 | ␉bool filteredChain = false;␊ |
818 | ␉bool foundPrimary = false;␊ |
819 | ␉BVRef bvr, bvr1 = 0, bvr2 = 0;␊ |
820 | ␉␊ |
821 | ␉if (chain->filtered) filteredChain = true;␊ |
822 | ␉␊ |
823 | ␉if (multiboot_partition_set)␊ |
824 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
825 | ␉␉␉if ( bvr->part_no == multiboot_partition && bvr->biosdev == gBIOSDev ) ␊ |
826 | ␉␉␉␉return bvr;␊ |
827 | ␉␊ |
828 | ␉/*␊ |
829 | ␉ * Checking "Default Partition" key in system configuration - use format: hd(x,y), the volume UUID or label -␊ |
830 | ␉ * to override the default selection.␊ |
831 | ␉ * We accept only kBVFlagSystemVolume or kBVFlagForeignBoot volumes.␊ |
832 | ␉ */␊ |
833 | ␉char *val = XMLDecode(getStringForKey(kDefaultPartitionKey, &bootInfo->bootConfig));␊ |
834 | if (val) {␊ |
835 | for ( bvr = chain; bvr; bvr = bvr->next ) {␊ |
836 | if (matchVolumeToString(bvr, val, false)) {␊ |
837 | free(val);␊ |
838 | return bvr;␊ |
839 | }␊ |
840 | }␊ |
841 | free(val);␊ |
842 | }␊ |
843 | ␉␊ |
844 | ␉/*␊ |
845 | ␉ * Scannig the volume chain backwards and trying to find ␊ |
846 | ␉ * a HFS+ volume with valid boot record signature.␊ |
847 | ␉ * If not found any active partition then we will␊ |
848 | ␉ * select this volume as the boot volume.␊ |
849 | ␉ */␊ |
850 | ␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
851 | ␉{␊ |
852 | ␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) foundPrimary = true;␊ |
853 | ␉␉// zhell -- Undo a regression that was introduced from r491 to 492.␊ |
854 | ␉␉// if gBIOSBootVolume is set already, no change is required␊ |
855 | ␉␉if ( bvr->flags & (kBVFlagBootable|kBVFlagSystemVolume)␊ |
856 | ␉␉␉&& gBIOSBootVolume␊ |
857 | ␉␉␉&& (!filteredChain || (filteredChain && bvr->visible))␊ |
858 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
859 | ␉␉␉bvr2 = bvr;␊ |
860 | ␉␉// zhell -- if gBIOSBootVolume is NOT set, we use the "if" statement␊ |
861 | ␉␉// from r491,␊ |
862 | ␉␉if ( bvr->flags & kBVFlagBootable␊ |
863 | ␉␉␉&& ! gBIOSBootVolume␊ |
864 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
865 | ␉␉␉bvr2 = bvr;␊ |
866 | ␉} ␊ |
867 | ␉␊ |
868 | ␉␊ |
869 | ␉/*␊ |
870 | ␉ * Use the standrad method for selecting the boot volume.␊ |
871 | ␉ */␊ |
872 | ␉if (foundPrimary)␊ |
873 | ␉{␊ |
874 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
875 | ␉␉{␊ |
876 | ␉␉␉if ( bvr->flags & kBVFlagNativeBoot && bvr->biosdev == gBIOSDev ) bvr1 = bvr;␊ |
877 | ␉␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) bvr2 = bvr;␊ |
878 | ␉␉}␊ |
879 | ␉}␊ |
880 | ␉␊ |
881 | ␉bvr = bvr2 ? bvr2 :␊ |
882 | ␉bvr1 ? bvr1 : chain;␊ |
883 | ␉␊ |
884 | ␉return bvr;␊ |
885 | }␊ |
886 | ␊ |
887 | //==========================================================================␊ |
888 | ␊ |
889 | #define LP '('␊ |
890 | #define RP ')'␊ |
891 | int gBIOSDev;␊ |
892 | ␊ |
893 | /*!␊ |
894 | This is like boot2's gBootVolume except it is for the internal use of␊ |
895 | libsaio to track which volume an unqualified path should be relative to.␊ |
896 | This replaces bootInfo->kernDev as the carrier of this information.␊ |
897 | */␊ |
898 | static BVRef gRootVolume;␊ |
899 | ␊ |
900 | void setRootVolume(BVRef volume)␊ |
901 | {␊ |
902 | gRootVolume = volume;␊ |
903 | // Veto non-native FS. Basically that means don't allow the root volume to␊ |
904 | // be set to a volume we can't read files from.␊ |
905 | if(gRootVolume != NULL && ((gRootVolume->flags & kBVFlagNativeBoot) == 0))␊ |
906 | gRootVolume = NULL;␊ |
907 | }␊ |
908 | ␊ |
909 | void setBootGlobals(BVRef chain)␊ |
910 | {␊ |
911 | // Record default boot device.␊ |
912 | gBootVolume = selectBootVolume(chain);␊ |
913 | ␊ |
914 | // turbo - Save the ORIGINAL boot volume too for loading our mkext␊ |
915 | if (!gBIOSBootVolume) gBIOSBootVolume = gBootVolume;␊ |
916 | ␊ |
917 | setRootVolume(gBootVolume);␊ |
918 | }␊ |
919 | ␊ |
920 | /*!␊ |
921 | Extracts the volume selector from the pathname, returns the selected␊ |
922 | BVRef, and sets *outPath to the remainder of the path.␊ |
923 | If the path did not include a volume selector then the current volume␊ |
924 | is used. When called with a volume selector the current volume␊ |
925 | is changed to the selected volume unless the volume selector is␊ |
926 | that of a ramdisk.␊ |
927 | */␊ |
928 | BVRef getBootVolumeRef( const char * path, const char ** outPath )␊ |
929 | {␊ |
930 | const char * cp;␊ |
931 | BVRef bvr = gRootVolume;␊ |
932 | int biosdev = gBIOSDev;␊ |
933 | ␊ |
934 | // Search for left parenthesis in the path specification.␊ |
935 | ␊ |
936 | for (cp = path; *cp; cp++) {␊ |
937 | if (*cp == LP || *cp == '/') break;␊ |
938 | }␊ |
939 | ␊ |
940 | if (*cp != LP) // no left paren found␊ |
941 | {␊ |
942 | // Path is using the implicit current device so if there is␊ |
943 | // no current device, then we must fail.␊ |
944 | cp = path;␊ |
945 | if ( gRootVolume == NULL )␊ |
946 | return NULL;␊ |
947 | }␊ |
948 | else if ((cp - path) == 2) // found "xx("␊ |
949 | {␊ |
950 | const struct devsw * dp;␊ |
951 | const char * xp = path;␊ |
952 | int i;␊ |
953 | int unit = -1;␊ |
954 | int part = -1;␊ |
955 | ␊ |
956 | cp++;␊ |
957 | ␊ |
958 | // Check the 2 character device name pointed by 'xp'.␊ |
959 | ␊ |
960 | for (dp = devsw; dp->name; dp++)␊ |
961 | {␊ |
962 | if ((xp[0] == dp->name[0]) && (xp[1] == dp->name[1]))␊ |
963 | break; // found matching entry␊ |
964 | }␊ |
965 | if (dp->name == NULL)␊ |
966 | {␊ |
967 | error("Unknown device '%c%c'\n", xp[0], xp[1]);␊ |
968 | return NULL;␊ |
969 | }␊ |
970 | ␊ |
971 | // Extract the optional unit number from the specification.␊ |
972 | // hd(unit) or hd(unit, part).␊ |
973 | ␊ |
974 | i = 0;␊ |
975 | while (*cp >= '0' && *cp <= '9')␊ |
976 | {␊ |
977 | i = i * 10 + *cp++ - '0';␊ |
978 | unit = i;␊ |
979 | }␊ |
980 | ␊ |
981 | // Unit is no longer optional and never really was.␊ |
982 | // If the user failed to specify it then the unit number from the previous kernDev␊ |
983 | // would have been used which makes little sense anyway.␊ |
984 | // For example, if the user did fd()/foobar and the current root device was the␊ |
985 | // second hard disk (i.e. unit 1) then fd() would select the second floppy drive!␊ |
986 | if(unit == -1)␊ |
987 | return NULL;␊ |
988 | ␊ |
989 | // Extract the optional partition number from the specification.␊ |
990 | ␊ |
991 | if (*cp == ',')␊ |
992 | part = atoi(++cp);␊ |
993 | ␊ |
994 | // If part is not specified part will be -1 whereas before it would have been␊ |
995 | // whatever the last partition was which makes about zero sense if the device␊ |
996 | // has been switched.␊ |
997 | ␊ |
998 | // Skip past the right paren.␊ |
999 | ␊ |
1000 | for ( ; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1001 | if (*cp == RP) cp++;␊ |
1002 | ␊ |
1003 | biosdev = dp->biosdev + unit;␊ |
1004 | bvr = newBootVolumeRef(biosdev, part);␊ |
1005 | ␊ |
1006 | if(bvr == NULL)␊ |
1007 | return NULL;␊ |
1008 | }␊ |
1009 | else␊ |
1010 | {␊ |
1011 | // Bad device specifier, skip past the right paren.␊ |
1012 | ␊ |
1013 | for ( cp++; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1014 | if (*cp == RP) cp++;␊ |
1015 | // If gRootVolume was NULL, then bvr will be NULL as well which␊ |
1016 | // should be caught by the caller.␊ |
1017 | }␊ |
1018 | ␊ |
1019 | // Returns the file path following the device spec.␊ |
1020 | // e.g. 'hd(1,b)mach_kernel' is reduced to 'mach_kernel'.␊ |
1021 | ␊ |
1022 | *outPath = cp;␊ |
1023 | ␊ |
1024 | return bvr;␊ |
1025 | }␊ |
1026 | ␊ |
1027 | //==========================================================================␊ |
1028 | // Function name is a misnomer as scanBootVolumes usually calls diskScanBootVolumes␊ |
1029 | // which caches the information. So it's only allocated on the first run.␊ |
1030 | static BVRef newBootVolumeRef( int biosdev, int partno )␊ |
1031 | {␊ |
1032 | ␉BVRef bvr, bvr1, bvrChain;␊ |
1033 | ␊ |
1034 | ␉bvr = bvr1 = NULL;␊ |
1035 | ␊ |
1036 | // Try resolving "rd" and "bt" devices first.␊ |
1037 | ␉if (biosdev == kPseudoBIOSDevRAMDisk)␊ |
1038 | ␉{␊ |
1039 | ␉␉if (gRAMDiskVolume)␊ |
1040 | ␉␉ bvr1 = gRAMDiskVolume;␊ |
1041 | ␉}␊ |
1042 | ␉else if (biosdev == kPseudoBIOSDevBooter)␊ |
1043 | ␉{␊ |
1044 | ␉␉if (gRAMDiskVolume != NULL && gRAMDiskBTAliased)␊ |
1045 | ␉␉␉bvr1 = gRAMDiskVolume;␊ |
1046 | ␉␉else␊ |
1047 | ␉␉␉bvr1 = gBIOSBootVolume;␊ |
1048 | ␉}␊ |
1049 | ␉else␊ |
1050 | ␉{␊ |
1051 | ␉␉// Fetch the volume list from the device.␊ |
1052 | ␊ |
1053 | ␉␉scanBootVolumes( biosdev, NULL );␊ |
1054 | ␉␉bvrChain = getBVChainForBIOSDev(biosdev);␊ |
1055 | ␊ |
1056 | ␉␉// Look for a perfect match based on device and partition number.␊ |
1057 | ␊ |
1058 | ␉␉for ( bvr1 = NULL, bvr = bvrChain; bvr; bvr = bvr->next )␊ |
1059 | ␉␉{␊ |
1060 | ␉␉␉if ( ( bvr->flags & kBVFlagNativeBoot ) == 0 ) continue;␊ |
1061 | ␊ |
1062 | ␉␉␉bvr1 = bvr;␊ |
1063 | ␉␉␉if ( bvr->part_no == partno ) break;␊ |
1064 | ␉␉}␊ |
1065 | ␉}␊ |
1066 | ␊ |
1067 | ␉return bvr ? bvr : bvr1;␊ |
1068 | }␊ |
1069 | ␊ |
1070 | //==========================================================================␊ |
1071 | // getDeviceDescription() - Extracts unit number and partition number␊ |
1072 | // from bvr structure into "dw(u,p)" format.␊ |
1073 | // Returns length of the out string␊ |
1074 | int getDeviceDescription(BVRef bvr, char *str)␊ |
1075 | {␊ |
1076 | if(!str)␊ |
1077 | return 0;␊ |
1078 | ␊ |
1079 | ␉*str = '\0';␊ |
1080 | ␊ |
1081 | ␉if (bvr)␊ |
1082 | ␉{␊ |
1083 | const struct devsw *dp = devsw;␊ |
1084 | ␉␉while(dp->name && bvr->biosdev >= dp->biosdev)␊ |
1085 | dp++;␊ |
1086 | ␊ |
1087 | ␉␉dp--;␊ |
1088 | ␉␉if (dp->name)␊ |
1089 | return sprintf(str, "%s(%d,%d)", dp->name, bvr->biosdev - dp->biosdev, bvr->part_no);␊ |
1090 | ␉}␊ |
1091 | ␉␊ |
1092 | ␉return 0;␊ |
1093 | }␊ |
1094 | |