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 | ␊ |
62 | #include "libsaio.h"␊ |
63 | #include "boot.h"␊ |
64 | #include "bootstruct.h"␊ |
65 | #include "disk.h"␊ |
66 | #include "ramdisk.h"␊ |
67 | #include "xml.h"␊ |
68 | ␊ |
69 | #include <libkern/crypto/md5.h>␊ |
70 | //#include <uuid/uuid.h>␊ |
71 | ␊ |
72 | #if 0 /* No OS X release has ever included this. */␊ |
73 | #include <Kernel/uuid/namespace.h>␊ |
74 | #else␊ |
75 | // from our uuid/namespace.h (UFS and HFS uuids can live in the same space?)␊ |
76 | static unsigned char kFSUUIDNamespaceSHA1[] = {0xB3,0xE2,0x0F,0x39,0xF2,0x92,0x11,0xD6,0x97,0xA4,0x00,0x30,0x65,0x43,0xEC,0xAC};␊ |
77 | #endif␊ |
78 | ␊ |
79 | extern int multiboot_partition;␊ |
80 | extern int multiboot_partition_set;␊ |
81 | ␊ |
82 | struct devsw {␊ |
83 | const char * name;␊ |
84 | // size increased from char to short to handle non-BIOS internal devices␊ |
85 | unsigned short biosdev;␊ |
86 | int type;␊ |
87 | };␊ |
88 | ␊ |
89 | // Device entries must be ordered by bios device numbers. ␊ |
90 | static struct devsw devsw[] =␊ |
91 | {␊ |
92 | { "hd", 0x80, kBIOSDevTypeHardDrive }, /* DEV_HD */␊ |
93 | { "en", 0xE0, kBIOSDevTypeNetwork }, /* DEV_EN */␊ |
94 | { "rd", 0x100, kBIOSDevTypeHardDrive },␊ |
95 | { "bt", 0x101, kBIOSDevTypeHardDrive }, // turbo - type for booter partition␊ |
96 | { 0, 0 }␊ |
97 | };␊ |
98 | ␊ |
99 | // Pseudo BIOS devices␊ |
100 | enum {␊ |
101 | ␉kPseudoBIOSDevRAMDisk = 0x100,␊ |
102 | ␉kPseudoBIOSDevBooter = 0x101␊ |
103 | };␊ |
104 | ␊ |
105 | /*␊ |
106 | * Max number of file descriptors.␊ |
107 | */␊ |
108 | #define NFILES 6␊ |
109 | ␊ |
110 | static struct iob iob[NFILES];␊ |
111 | ␊ |
112 | void * gFSLoadAddress = 0;␊ |
113 | ␊ |
114 | // Turbo - save what we think is our original BIOS boot volume if we have one 0xab␊ |
115 | BVRef gBIOSBootVolume = NULL;␊ |
116 | BVRef gBootVolume;␊ |
117 | ␊ |
118 | //static BVRef getBootVolumeRef( const char * path, const char ** outPath );␊ |
119 | static BVRef newBootVolumeRef( int biosdev, int partno );␊ |
120 | ␊ |
121 | //==========================================================================␊ |
122 | // LoadVolumeFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
123 | // Load the specified file from the specified volume␊ |
124 | // to the load buffer at LOAD_ADDR.␊ |
125 | // If the file is fat, load only the i386 portion.␊ |
126 | ␊ |
127 | long LoadVolumeFile(BVRef bvr, const char *filePath)␊ |
128 | {␊ |
129 | long fileSize;␊ |
130 | ␊ |
131 | // Read file into load buffer. The data in the load buffer will be␊ |
132 | // overwritten by the next LoadFile() call.␊ |
133 | ␊ |
134 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
135 | ␊ |
136 | fileSize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
137 | ␊ |
138 | // Return the size of the file, or -1 if load failed.␊ |
139 | ␊ |
140 | return fileSize;␊ |
141 | }␊ |
142 | ␊ |
143 | //==========================================================================␊ |
144 | // LoadFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
145 | // Load the specified file to the load buffer at LOAD_ADDR.␊ |
146 | // If the file is fat, load only the i386 portion.␊ |
147 | ␊ |
148 | long LoadFile(const char * fileSpec)␊ |
149 | {␊ |
150 | const char * filePath;␊ |
151 | BVRef bvr;␊ |
152 | ␊ |
153 | // Resolve the boot volume from the file spec.␊ |
154 | ␊ |
155 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
156 | return -1;␊ |
157 | ␊ |
158 | return LoadVolumeFile(bvr, filePath);␊ |
159 | }␊ |
160 | ␊ |
161 | long ReadFileAtOffset(const char * fileSpec, void *buffer, uint64_t offset, uint64_t length)␊ |
162 | {␊ |
163 | const char *filePath;␊ |
164 | BVRef bvr;␊ |
165 | ␊ |
166 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
167 | return -1;␊ |
168 | ␊ |
169 | if (bvr->fs_readfile == NULL)␊ |
170 | return -1;␊ |
171 | ␊ |
172 | return bvr->fs_readfile(bvr, (char *)filePath, buffer, offset, length);␊ |
173 | }␊ |
174 | ␊ |
175 | long LoadThinFatFile(const char *fileSpec, void **binary)␊ |
176 | {␊ |
177 | const char *filePath;␊ |
178 | FSReadFile readFile;␊ |
179 | BVRef bvr;␊ |
180 | unsigned long length, 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 | gFSLoadAddress = (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 | length += length2;␊ |
212 | }␊ |
213 | }␊ |
214 | } else {␊ |
215 | length = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
216 | if (length > 0) {␊ |
217 | ThinFatFile(binary, &length);␊ |
218 | }␊ |
219 | }␊ |
220 | ␊ |
221 | return length;␊ |
222 | }␊ |
223 | ␊ |
224 | #if UNUSED␊ |
225 | long GetFSUUID(char *spec, char *uuidStr)␊ |
226 | {␊ |
227 | BVRef bvr;␊ |
228 | long rval = -1;␊ |
229 | const char *devSpec;␊ |
230 | ␊ |
231 | if ((bvr = getBootVolumeRef(spec, &devSpec)) == NULL)␊ |
232 | return -1;␊ |
233 | ␊ |
234 | if(bvr->fs_getuuid)␊ |
235 | rval = bvr->fs_getuuid(bvr, uuidStr);␊ |
236 | ␊ |
237 | return rval;␊ |
238 | }␊ |
239 | #endif␊ |
240 | ␊ |
241 | // filesystem-specific getUUID functions call this shared string generator␊ |
242 | long CreateUUIDString(uint8_t uubytes[], int nbytes, char *uuidStr)␊ |
243 | {␊ |
244 | unsigned fmtbase, fmtidx, i;␊ |
245 | uint8_t uuidfmt[] = { 4, 2, 2, 2, 6 };␊ |
246 | char *p = uuidStr;␊ |
247 | MD5_CTX md5c;␊ |
248 | uint8_t mdresult[16];␊ |
249 | ␊ |
250 | bzero(mdresult, sizeof(mdresult));␊ |
251 | ␊ |
252 | // just like AppleFileSystemDriver␊ |
253 | MD5Init(&md5c);␊ |
254 | MD5Update(&md5c, kFSUUIDNamespaceSHA1, sizeof(kFSUUIDNamespaceSHA1));␊ |
255 | MD5Update(&md5c, uubytes, nbytes);␊ |
256 | MD5Final(mdresult, &md5c);␊ |
257 | ␊ |
258 | // this UUID has been made version 3 style (i.e. via namespace)␊ |
259 | // see "-uuid-urn-" IETF draft (which otherwise copies byte for byte)␊ |
260 | mdresult[6] = 0x30 | ( mdresult[6] & 0x0F );␊ |
261 | mdresult[8] = 0x80 | ( mdresult[8] & 0x3F );␊ |
262 | ␊ |
263 | ␊ |
264 | // generate the text: e.g. 5EB1869F-C4FA-3502-BDEB-3B8ED5D87292␊ |
265 | i = 0; fmtbase = 0;␊ |
266 | for(fmtidx = 0; fmtidx < sizeof(uuidfmt); fmtidx++) {␊ |
267 | for(i=0; i < uuidfmt[fmtidx]; i++) {␊ |
268 | uint8_t byte = mdresult[fmtbase+i];␊ |
269 | char nib;␊ |
270 | ␊ |
271 | nib = byte >> 4;␊ |
272 | *p = nib + '0'; // 0x4 -> '4'␊ |
273 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
274 | p++;␊ |
275 | ␊ |
276 | nib = byte & 0xf;␊ |
277 | *p = nib + '0'; // 0x4 -> '4'␊ |
278 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
279 | p++;␊ |
280 | ␊ |
281 | }␊ |
282 | fmtbase += i;␊ |
283 | if(fmtidx < sizeof(uuidfmt)-1)␊ |
284 | *(p++) = '-';␊ |
285 | else␊ |
286 | *p = '\0';␊ |
287 | }␊ |
288 | ␊ |
289 | return 0;␊ |
290 | }␊ |
291 | ␊ |
292 | ␊ |
293 | //==========================================================================␊ |
294 | // GetDirEntry - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
295 | // Fetch the next directory entry for the given directory.␊ |
296 | ␊ |
297 | long GetDirEntry(const char * dirSpec, long long * dirIndex, const char ** name, ␊ |
298 | long * flags, long * time)␊ |
299 | {␊ |
300 | const char * dirPath;␊ |
301 | BVRef bvr;␊ |
302 | ␊ |
303 | // Resolve the boot volume from the dir spec.␊ |
304 | ␊ |
305 | if ((bvr = getBootVolumeRef(dirSpec, &dirPath)) == NULL)␊ |
306 | return -1;␊ |
307 | ␊ |
308 | // Return 0 on success, or -1 if there are no additional entries.␊ |
309 | ␊ |
310 | return bvr->fs_getdirentry( bvr,␊ |
311 | /* dirPath */ (char *)dirPath,␊ |
312 | /* dirIndex */ dirIndex,␊ |
313 | /* dirEntry */ (char **)name, flags, time, 0, 0 );␊ |
314 | }␊ |
315 | ␊ |
316 | //==========================================================================␊ |
317 | // GetFileInfo - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
318 | // Get attributes for the specified file.␊ |
319 | ␊ |
320 | static char* gMakeDirSpec;␊ |
321 | ␊ |
322 | long GetFileInfo(const char * dirSpec, const char * name,␊ |
323 | long * flags, long * time)␊ |
324 | {␊ |
325 | long long index = 0;␊ |
326 | const char * entryName;␊ |
327 | ␊ |
328 | if (gMakeDirSpec == 0)␊ |
329 | gMakeDirSpec = (char *)malloc(1024);␊ |
330 | ␊ |
331 | if (!dirSpec) {␊ |
332 | long idx, len;␊ |
333 | ␊ |
334 | len = strlen(name);␊ |
335 | ␊ |
336 | for (idx = len; idx && (name[idx] != '/' && name[idx] != '\\'); idx--) {}␊ |
337 | if (idx == 0) {␊ |
338 | gMakeDirSpec[0] = '/';␊ |
339 | gMakeDirSpec[1] = '\0';␊ |
340 | } else {␊ |
341 | idx++;␊ |
342 | strncpy(gMakeDirSpec, name, idx);␊ |
343 | name += idx;␊ |
344 | }␊ |
345 | dirSpec = gMakeDirSpec;␊ |
346 | }␊ |
347 | ␊ |
348 | while (GetDirEntry(dirSpec, &index, &entryName, flags, time) == 0)␊ |
349 | {␊ |
350 | if (strcmp(entryName, name) == 0)␊ |
351 | return 0; // success␊ |
352 | }␊ |
353 | return -1; // file not found␊ |
354 | }␊ |
355 | ␊ |
356 | long GetFileBlock(const char *fileSpec, unsigned long long *firstBlock)␊ |
357 | {␊ |
358 | const char * filePath;␊ |
359 | BVRef bvr;␊ |
360 | ␊ |
361 | // Resolve the boot volume from the file spec.␊ |
362 | ␊ |
363 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL) {␊ |
364 | printf("Boot volume for '%s' is bogus\n", fileSpec);␊ |
365 | return -1;␊ |
366 | }␊ |
367 | ␊ |
368 | return bvr->fs_getfileblock(bvr, (char *)filePath, firstBlock);␊ |
369 | }␊ |
370 | ␊ |
371 | //==========================================================================␊ |
372 | // GetFreeFD()␊ |
373 | ␊ |
374 | static int GetFreeFd(void)␊ |
375 | {␊ |
376 | ␉int␉fd;␊ |
377 | ␊ |
378 | ␉// Locate a free descriptor slot.␊ |
379 | ␉for (fd = 0; fd < NFILES; fd++) {␊ |
380 | ␉␉if (iob[fd].i_flgs == 0) {␊ |
381 | ␉␉␉return fd;␊ |
382 | ␉ ␉}␊ |
383 | ␉}␊ |
384 | ␉stop("Out of file descriptors");␊ |
385 | ␉// not reached␊ |
386 | ␉return -1;␊ |
387 | }␊ |
388 | ␊ |
389 | //==========================================================================␊ |
390 | // iob_from_fdesc()␊ |
391 | //␊ |
392 | // Return a pointer to an allocated 'iob' based on the file descriptor␊ |
393 | // provided. Returns NULL if the file descriptor given is invalid.␊ |
394 | ␊ |
395 | static struct iob * iob_from_fdesc(int fdesc)␊ |
396 | {␊ |
397 | register struct iob * io;␊ |
398 | ␊ |
399 | if (fdesc < 0 || fdesc >= NFILES ||␊ |
400 | ((io = &iob[fdesc])->i_flgs & F_ALLOC) == 0)␊ |
401 | return NULL;␊ |
402 | else␊ |
403 | return io;␊ |
404 | }␊ |
405 | ␊ |
406 | //==========================================================================␊ |
407 | // openmem()␊ |
408 | ␊ |
409 | int openmem(char * buf, int len)␊ |
410 | {␊ |
411 | int fdesc;␊ |
412 | struct iob * io;␊ |
413 | ␊ |
414 | fdesc = GetFreeFd();␊ |
415 | io = &iob[fdesc];␊ |
416 | bzero(io, sizeof(*io));␊ |
417 | ␊ |
418 | // Mark the descriptor as taken. Set the F_MEM flag to indicate␊ |
419 | // that the file buffer is provided by the caller.␊ |
420 | ␊ |
421 | io->i_flgs = F_ALLOC | F_MEM;␊ |
422 | io->i_buf = buf;␊ |
423 | io->i_filesize = len;␊ |
424 | ␊ |
425 | return fdesc;␊ |
426 | }␊ |
427 | ␊ |
428 | //==========================================================================␊ |
429 | // open() - Open the file specified by 'path' for reading.␊ |
430 | ␊ |
431 | static int open_bvr(BVRef bvr, const char *filePath, int flags)␊ |
432 | {␊ |
433 | ␉struct iob␉*io;␊ |
434 | ␉int␉␉fdesc;␊ |
435 | ␉int␉␉i;␊ |
436 | ␊ |
437 | ␉if (bvr == NULL) {␊ |
438 | ␉␉return -1;␊ |
439 | ␉}␊ |
440 | ␊ |
441 | ␉fdesc = GetFreeFd();␊ |
442 | ␉io = &iob[fdesc];␊ |
443 | ␉bzero(io, sizeof(*io));␊ |
444 | ␊ |
445 | ␉// Mark the descriptor as taken.␊ |
446 | ␉io->i_flgs = F_ALLOC;␊ |
447 | ␊ |
448 | ␉// Find the next available memory block in the download buffer.␊ |
449 | ␉io->i_buf = (char *) LOAD_ADDR;␊ |
450 | ␉for (i = 0; i < NFILES; i++) {␊ |
451 | ␉␉if ((iob[i].i_flgs != F_ALLOC) || (i == fdesc)) {␊ |
452 | ␉␉␉continue;␊ |
453 | ␉␉}␊ |
454 | ␉␉io->i_buf = MAX(iob[i].i_filesize + iob[i].i_buf, io->i_buf);␊ |
455 | ␉}␊ |
456 | ␊ |
457 | ␉// Load entire file into memory. Unnecessary open() calls must be avoided.␊ |
458 | ␉gFSLoadAddress = io->i_buf;␊ |
459 | ␉io->i_filesize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
460 | ␉if (io->i_filesize < 0) {␊ |
461 | ␉␉close(fdesc);␊ |
462 | ␉␉return -1;␊ |
463 | ␉}␊ |
464 | ␉return fdesc;␊ |
465 | }␊ |
466 | ␊ |
467 | int open(const char *path, int flags)␊ |
468 | {␊ |
469 | ␉const char␉*filepath;␊ |
470 | ␉BVRef␉␉bvr;␊ |
471 | ␊ |
472 | ␉// Resolve the boot volume from the file spec.␊ |
473 | ␉if ((bvr = getBootVolumeRef(path, &filepath)) != NULL) {␊ |
474 | ␉␉return open_bvr(bvr, filepath, flags);␊ |
475 | ␉}␊ |
476 | ␉return -1;␊ |
477 | }␊ |
478 | ␊ |
479 | int open_bvdev(const char *bvd, const char *path, int flags)␊ |
480 | {␊ |
481 | const struct devsw␉*dp;␊ |
482 | ␉const char␉␉␉*cp;␊ |
483 | ␉BVRef␉␉␉␉bvr;␊ |
484 | ␉int␉␉␉␉␉i;␊ |
485 | ␉int␉␉␉␉␉len;␊ |
486 | ␉int␉␉␉␉␉unit;␊ |
487 | ␉int␉␉␉␉␉partition;␊ |
488 | ␊ |
489 | ␉if ((i = open(path, flags)) >= 0) {␊ |
490 | ␉␉return i;␊ |
491 | ␉}␊ |
492 | ␊ |
493 | ␉if (bvd == NULL || (len = strlen(bvd)) < 2) {␊ |
494 | ␉␉return -1;␊ |
495 | ␉}␊ |
496 | ␊ |
497 | ␉for (dp=devsw; dp->name; dp++) {␊ |
498 | ␉␉if (bvd[0] == dp->name[0] && bvd[1] == dp->name[1]) {␊ |
499 | ␉␉␉unit = 0;␊ |
500 | ␉␉␉partition = 0;␊ |
501 | ␉␉␉/* get optional unit and partition */␊ |
502 | ␉␉␉if (len >= 5 && bvd[2] == '(') { /* min must be present xx(0) */␊ |
503 | ␉␉␉␉cp = &bvd[3];␊ |
504 | ␉␉␉␉i = 0;␊ |
505 | ␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
506 | ␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
507 | ␉␉␉␉␉unit = i;␊ |
508 | ␉␉␉␉}␊ |
509 | ␉␉␉␉if (*cp++ == ',') {␊ |
510 | ␉␉␉␉␉i = 0;␊ |
511 | ␉␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
512 | ␉␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
513 | ␉␉␉␉␉␉partition = i;␊ |
514 | ␉␉␉␉␉}␊ |
515 | ␉␉␉␉}␊ |
516 | ␉␉␉}␊ |
517 | ␉␉␉bvr = newBootVolumeRef(dp->biosdev + unit, partition);␊ |
518 | ␉␉␉return open_bvr(bvr, path, flags);␊ |
519 | ␉␉}␊ |
520 | }␊ |
521 | ␉return -1;␊ |
522 | }␊ |
523 | ␊ |
524 | //==========================================================================␊ |
525 | // close() - Close a file descriptor.␊ |
526 | ␊ |
527 | int close(int fdesc)␊ |
528 | {␊ |
529 | struct iob * io;␊ |
530 | ␊ |
531 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
532 | return (-1);␊ |
533 | ␊ |
534 | io->i_flgs = 0;␊ |
535 | ␊ |
536 | return 0;␊ |
537 | }␊ |
538 | ␊ |
539 | //==========================================================================␊ |
540 | // lseek() - Reposition the byte offset of the file descriptor from the␊ |
541 | // beginning of the file. Returns the relocated offset.␊ |
542 | ␊ |
543 | int b_lseek(int fdesc, int offset, int ptr)␊ |
544 | {␊ |
545 | struct iob * io;␊ |
546 | ␊ |
547 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
548 | return (-1);␊ |
549 | ␊ |
550 | io->i_offset = offset;␊ |
551 | ␊ |
552 | return offset;␊ |
553 | }␊ |
554 | ␊ |
555 | //==========================================================================␊ |
556 | // tell() - Returns the byte offset of the file descriptor.␊ |
557 | ␊ |
558 | int tell(int fdesc)␊ |
559 | {␊ |
560 | struct iob * io;␊ |
561 | ␊ |
562 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
563 | return 0;␊ |
564 | ␊ |
565 | return io->i_offset;␊ |
566 | }␊ |
567 | ␊ |
568 | //==========================================================================␊ |
569 | // read() - Read up to 'count' bytes of data from the file descriptor␊ |
570 | // into the buffer pointed to by buf.␊ |
571 | ␊ |
572 | int read(int fdesc, char * buf, int count)␊ |
573 | {␊ |
574 | struct iob * io;␊ |
575 | ␊ |
576 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
577 | return (-1);␊ |
578 | ␊ |
579 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
580 | count = io->i_filesize - io->i_offset;␊ |
581 | ␊ |
582 | if (count <= 0)␊ |
583 | return 0; // end of file␊ |
584 | ␊ |
585 | bcopy(io->i_buf + io->i_offset, buf, count);␊ |
586 | ␊ |
587 | io->i_offset += count;␊ |
588 | ␊ |
589 | return count;␊ |
590 | }␊ |
591 | ␊ |
592 | //==========================================================================␊ |
593 | // write() - Write up to 'count' bytes of data to the file descriptor␊ |
594 | // from the buffer pointed to by buf.␊ |
595 | ␊ |
596 | int write(int fdesc, const char * buf, int count)␊ |
597 | {␊ |
598 | struct iob * io;␊ |
599 | ␊ |
600 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
601 | return (-1);␊ |
602 | ␉␊ |
603 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
604 | count = io->i_filesize - io->i_offset;␊ |
605 | ␉␊ |
606 | if (count <= 0)␊ |
607 | return 0; // end of file␊ |
608 | ␉␊ |
609 | bcopy(buf, io->i_buf + io->i_offset, count);␊ |
610 | ␉␊ |
611 | io->i_offset += count;␊ |
612 | ␉␊ |
613 | return count;␊ |
614 | }␊ |
615 | ␊ |
616 | int writebyte(int fdesc, char value)␊ |
617 | {␊ |
618 | struct iob * io;␊ |
619 | ␊ |
620 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
621 | return (-1);␊ |
622 | ␉␊ |
623 | if ((io->i_offset + 1) > (unsigned int)io->i_filesize)␊ |
624 | return 0; // end of file␊ |
625 | ␉␊ |
626 | io->i_buf[io->i_offset++] = value;␊ |
627 | ␉␊ |
628 | return 1;␊ |
629 | }␊ |
630 | ␊ |
631 | int writeint(int fdesc, int value)␊ |
632 | {␊ |
633 | struct iob * io;␊ |
634 | ␊ |
635 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
636 | return (-1);␊ |
637 | ␉␊ |
638 | if ((io->i_offset + 4) > (unsigned int)io->i_filesize)␊ |
639 | return 0; // end of file␊ |
640 | ␉␊ |
641 | bcopy(&value, io->i_buf + io->i_offset, 4);␊ |
642 | ␉␊ |
643 | io->i_offset += 4;␊ |
644 | ␉␊ |
645 | return 4;␊ |
646 | }␊ |
647 | ␊ |
648 | //==========================================================================␊ |
649 | // file_size() - Returns the size of the file described by the file␊ |
650 | // descriptor.␊ |
651 | ␊ |
652 | int file_size(int fdesc)␊ |
653 | {␊ |
654 | struct iob * io;␊ |
655 | ␊ |
656 | if ((io = iob_from_fdesc(fdesc)) == 0)␊ |
657 | return 0;␊ |
658 | ␊ |
659 | return io->i_filesize;␊ |
660 | }␊ |
661 | ␊ |
662 | //==========================================================================␊ |
663 | ␊ |
664 | struct dirstuff * vol_opendir(BVRef bvr, const char * path)␊ |
665 | {␊ |
666 | struct dirstuff * dirp = 0;␊ |
667 | ␊ |
668 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
669 | if (dirp == NULL)␊ |
670 | goto error;␊ |
671 | ␊ |
672 | dirp->dir_path = newString(path);␊ |
673 | if (dirp->dir_path == NULL)␊ |
674 | goto error;␊ |
675 | ␊ |
676 | dirp->dir_bvr = bvr;␊ |
677 | ␊ |
678 | return dirp;␊ |
679 | ␊ |
680 | error:␊ |
681 | closedir(dirp);␊ |
682 | return NULL;␊ |
683 | }␊ |
684 | ␊ |
685 | //==========================================================================␊ |
686 | ␊ |
687 | struct dirstuff * opendir(const char * path)␊ |
688 | {␊ |
689 | struct dirstuff * dirp = 0;␊ |
690 | const char * dirPath;␊ |
691 | BVRef bvr;␊ |
692 | ␊ |
693 | if ((bvr = getBootVolumeRef(path, &dirPath)) == NULL)␊ |
694 | goto error;␊ |
695 | ␊ |
696 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
697 | if (dirp == NULL)␊ |
698 | goto error;␊ |
699 | ␊ |
700 | dirp->dir_path = newString(dirPath);␊ |
701 | if (dirp->dir_path == NULL)␊ |
702 | goto error;␊ |
703 | ␊ |
704 | dirp->dir_bvr = bvr;␊ |
705 | ␊ |
706 | return dirp;␊ |
707 | ␊ |
708 | error:␊ |
709 | closedir(dirp);␊ |
710 | return NULL;␊ |
711 | }␊ |
712 | ␊ |
713 | //==========================================================================␊ |
714 | ␊ |
715 | int closedir(struct dirstuff * dirp)␊ |
716 | {␊ |
717 | if (dirp) {␊ |
718 | if (dirp->dir_path) free(dirp->dir_path);␊ |
719 | free(dirp);␊ |
720 | }␊ |
721 | return 0;␊ |
722 | }␊ |
723 | ␊ |
724 | //==========================================================================␊ |
725 | ␊ |
726 | int readdir(struct dirstuff * dirp, const char ** name, long * flags,␊ |
727 | long * time)␊ |
728 | {␊ |
729 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
730 | /* dirPath */ dirp->dir_path,␊ |
731 | /* dirIndex */ &dirp->dir_index,␊ |
732 | /* dirEntry */ (char **)name, flags, time,␊ |
733 | 0, 0);␊ |
734 | }␊ |
735 | ␊ |
736 | //==========================================================================␊ |
737 | ␊ |
738 | int readdir_ext(struct dirstuff * dirp, const char ** name, long * flags,␊ |
739 | long * time, FinderInfo *finderInfo, long *infoValid)␊ |
740 | {␊ |
741 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
742 | /* dirPath */ dirp->dir_path,␊ |
743 | /* dirIndex */ &dirp->dir_index,␊ |
744 | /* dirEntry */ (char **)name,␊ |
745 | flags, time,␊ |
746 | finderInfo, infoValid);␊ |
747 | }␊ |
748 | ␊ |
749 | //==========================================================================␊ |
750 | ␊ |
751 | const char * systemConfigDir()␊ |
752 | {␊ |
753 | if (gBootFileType == kNetworkDeviceType)␊ |
754 | ␉return "";␊ |
755 | return "/Library/Preferences/SystemConfiguration";␊ |
756 | }␊ |
757 | ␊ |
758 | //==========================================================================␊ |
759 | ␊ |
760 | int gBootFileType;␊ |
761 | ␊ |
762 | void scanBootVolumes( int biosdev, int * count )␊ |
763 | {␊ |
764 | BVRef bvr = 0;␊ |
765 | ␊ |
766 | bvr = diskScanBootVolumes(biosdev, count);␊ |
767 | if (bvr == NULL)␊ |
768 | {␊ |
769 | bvr = nbpScanBootVolumes(biosdev, count);␊ |
770 | if (bvr != NULL)␊ |
771 | {␊ |
772 | gBootFileType = kNetworkDeviceType;␊ |
773 | }␊ |
774 | }␊ |
775 | else␊ |
776 | {␊ |
777 | gBootFileType = kBlockDeviceType;␊ |
778 | }␊ |
779 | }␊ |
780 | ␊ |
781 | //==========================================================================␊ |
782 | ␊ |
783 | void scanDisks(int biosdev, int *count)␊ |
784 | {␊ |
785 | #define MAX_HDD_COUNT 32␊ |
786 | int bvCount;␊ |
787 | int hd = 0;␊ |
788 | ␊ |
789 | // Testing up to MAX_HDD_COUNT hard drives.␊ |
790 | ␉while(!testBiosread(0x80 + hd, 0) && hd < MAX_HDD_COUNT)␊ |
791 | ␉{␊ |
792 | ␉ bvCount = 0;␊ |
793 | ␉ scanBootVolumes(0x80 + hd, &bvCount);␊ |
794 | hd++;␊ |
795 | ␉}␊ |
796 | ␊ |
797 | // Also scanning CD/DVD drive.␊ |
798 | ␉if (biosDevIsCDROM(gBIOSDev))␊ |
799 | ␉{␊ |
800 | ␉ bvCount = 0;␊ |
801 | ␉scanBootVolumes(gBIOSDev, &bvCount);␊ |
802 | ␉}␊ |
803 | }␊ |
804 | ␊ |
805 | //==========================================================================␊ |
806 | ␊ |
807 | BVRef selectBootVolume( BVRef chain )␊ |
808 | {␊ |
809 | ␉bool filteredChain = false;␊ |
810 | ␉bool foundPrimary = false;␊ |
811 | ␉BVRef bvr, bvr1 = 0, bvr2 = 0;␊ |
812 | ␉␊ |
813 | ␉if (chain->filtered) filteredChain = true;␊ |
814 | ␉␊ |
815 | ␉if (multiboot_partition_set)␊ |
816 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
817 | ␉␉␉if ( bvr->part_no == multiboot_partition && bvr->biosdev == gBIOSDev ) ␊ |
818 | ␉␉␉␉return bvr;␊ |
819 | ␉␊ |
820 | ␉/*␊ |
821 | ␉ * Checking "Default Partition" key in system configuration - use format: hd(x,y), the volume UUID or label -␊ |
822 | ␉ * to override the default selection.␊ |
823 | ␉ * We accept only kBVFlagSystemVolume or kBVFlagForeignBoot volumes.␊ |
824 | ␉ */␊ |
825 | ␉char *val = XMLDecode(getStringForKey(kDefaultPartitionKey, &bootInfo->bootConfig));␊ |
826 | if (val) {␊ |
827 | for ( bvr = chain; bvr; bvr = bvr->next ) {␊ |
828 | if (matchVolumeToString(bvr, val, false)) {␊ |
829 | free(val);␊ |
830 | return bvr;␊ |
831 | }␊ |
832 | }␊ |
833 | free(val);␊ |
834 | }␊ |
835 | ␉␊ |
836 | ␉/*␊ |
837 | ␉ * Scannig the volume chain backwards and trying to find ␊ |
838 | ␉ * a HFS+ volume with valid boot record signature.␊ |
839 | ␉ * If not found any active partition then we will␊ |
840 | ␉ * select this volume as the boot volume.␊ |
841 | ␉ */␊ |
842 | ␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
843 | ␉{␊ |
844 | ␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) foundPrimary = true;␊ |
845 | ␉␉// zhell -- Undo a regression that was introduced from r491 to 492.␊ |
846 | ␉␉// if gBIOSBootVolume is set already, no change is required␊ |
847 | ␉␉if ( bvr->flags & (kBVFlagBootable|kBVFlagSystemVolume)␊ |
848 | ␉␉␉&& gBIOSBootVolume␊ |
849 | ␉␉␉&& (!filteredChain || (filteredChain && bvr->visible))␊ |
850 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
851 | ␉␉␉bvr2 = bvr;␊ |
852 | ␉␉// zhell -- if gBIOSBootVolume is NOT set, we use the "if" statement␊ |
853 | ␉␉// from r491,␊ |
854 | ␉␉if ( bvr->flags & kBVFlagBootable␊ |
855 | ␉␉␉&& ! gBIOSBootVolume␊ |
856 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
857 | ␉␉␉bvr2 = bvr;␊ |
858 | ␉} ␊ |
859 | ␉␊ |
860 | ␉␊ |
861 | ␉/*␊ |
862 | ␉ * Use the standrad method for selecting the boot volume.␊ |
863 | ␉ */␊ |
864 | ␉if (foundPrimary)␊ |
865 | ␉{␊ |
866 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
867 | ␉␉{␊ |
868 | ␉␉␉if ( bvr->flags & kBVFlagNativeBoot && bvr->biosdev == gBIOSDev ) bvr1 = bvr;␊ |
869 | ␉␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) bvr2 = bvr;␊ |
870 | ␉␉}␊ |
871 | ␉}␊ |
872 | ␉␊ |
873 | ␉bvr = bvr2 ? bvr2 :␊ |
874 | ␉bvr1 ? bvr1 : chain;␊ |
875 | ␉␊ |
876 | ␉return bvr;␊ |
877 | }␊ |
878 | ␊ |
879 | //==========================================================================␊ |
880 | ␊ |
881 | #define LP '('␊ |
882 | #define RP ')'␊ |
883 | int gBIOSDev;␊ |
884 | ␊ |
885 | /*!␊ |
886 | This is like boot2's gBootVolume except it is for the internal use of␊ |
887 | libsaio to track which volume an unqualified path should be relative to.␊ |
888 | This replaces bootInfo->kernDev as the carrier of this information.␊ |
889 | */␊ |
890 | static BVRef gRootVolume;␊ |
891 | ␊ |
892 | void setRootVolume(BVRef volume)␊ |
893 | {␊ |
894 | gRootVolume = volume;␊ |
895 | // Veto non-native FS. Basically that means don't allow the root volume to␊ |
896 | // be set to a volume we can't read files from.␊ |
897 | if(gRootVolume != NULL && ((gRootVolume->flags & kBVFlagNativeBoot) == 0))␊ |
898 | gRootVolume = NULL;␊ |
899 | }␊ |
900 | ␊ |
901 | void setBootGlobals(BVRef chain)␊ |
902 | {␊ |
903 | // Record default boot device.␊ |
904 | gBootVolume = selectBootVolume(chain);␊ |
905 | ␊ |
906 | // turbo - Save the ORIGINAL boot volume too for loading our mkext␊ |
907 | if (!gBIOSBootVolume) gBIOSBootVolume = gBootVolume;␊ |
908 | ␊ |
909 | setRootVolume(gBootVolume);␉␊ |
910 | }␊ |
911 | ␊ |
912 | /*!␊ |
913 | Extracts the volume selector from the pathname, returns the selected␊ |
914 | BVRef, and sets *outPath to the remainder of the path.␊ |
915 | If the path did not include a volume selector then the current volume␊ |
916 | is used. When called with a volume selector the current volume␊ |
917 | is changed to the selected volume unless the volume selector is␊ |
918 | that of a ramdisk.␊ |
919 | */␊ |
920 | BVRef getBootVolumeRef( const char * path, const char ** outPath )␊ |
921 | {␊ |
922 | const char * cp;␊ |
923 | BVRef bvr = gRootVolume;␊ |
924 | int biosdev = gBIOSDev;␊ |
925 | ␊ |
926 | // Search for left parenthesis in the path specification.␊ |
927 | ␊ |
928 | for (cp = path; *cp; cp++) {␊ |
929 | if (*cp == LP || *cp == '/') break;␊ |
930 | }␊ |
931 | ␊ |
932 | if (*cp != LP) // no left paren found␊ |
933 | {␊ |
934 | // Path is using the implicit current device so if there is␊ |
935 | // no current device, then we must fail.␊ |
936 | cp = path;␊ |
937 | if ( gRootVolume == NULL )␊ |
938 | return NULL;␊ |
939 | }␊ |
940 | else if ((cp - path) == 2) // found "xx("␊ |
941 | {␊ |
942 | const struct devsw * dp;␊ |
943 | const char * xp = path;␊ |
944 | int i;␊ |
945 | int unit = -1;␊ |
946 | int part = -1;␊ |
947 | ␊ |
948 | cp++;␊ |
949 | ␊ |
950 | // Check the 2 character device name pointed by 'xp'.␊ |
951 | ␊ |
952 | for (dp = devsw; dp->name; dp++)␊ |
953 | {␊ |
954 | if ((xp[0] == dp->name[0]) && (xp[1] == dp->name[1]))␊ |
955 | break; // found matching entry␊ |
956 | }␊ |
957 | if (dp->name == NULL)␊ |
958 | {␊ |
959 | error("Unknown device '%c%c'\n", xp[0], xp[1]);␊ |
960 | return NULL;␊ |
961 | }␊ |
962 | ␊ |
963 | // Extract the optional unit number from the specification.␊ |
964 | // hd(unit) or hd(unit, part).␊ |
965 | ␊ |
966 | i = 0;␊ |
967 | while (*cp >= '0' && *cp <= '9')␊ |
968 | {␊ |
969 | i = i * 10 + *cp++ - '0';␊ |
970 | unit = i;␊ |
971 | }␊ |
972 | ␊ |
973 | // Unit is no longer optional and never really was.␊ |
974 | // If the user failed to specify it then the unit number from the previous kernDev␊ |
975 | // would have been used which makes little sense anyway.␊ |
976 | // For example, if the user did fd()/foobar and the current root device was the␊ |
977 | // second hard disk (i.e. unit 1) then fd() would select the second floppy drive!␊ |
978 | if(unit == -1)␊ |
979 | return NULL;␊ |
980 | ␊ |
981 | // Extract the optional partition number from the specification.␊ |
982 | ␊ |
983 | if (*cp == ',')␊ |
984 | part = atoi(++cp);␊ |
985 | ␊ |
986 | // If part is not specified part will be -1 whereas before it would have been␊ |
987 | // whatever the last partition was which makes about zero sense if the device␊ |
988 | // has been switched.␊ |
989 | ␊ |
990 | // Skip past the right paren.␊ |
991 | ␊ |
992 | for ( ; *cp && *cp != RP; cp++) /* LOOP */;␊ |
993 | if (*cp == RP) cp++;␊ |
994 | ␊ |
995 | biosdev = dp->biosdev + unit;␊ |
996 | bvr = newBootVolumeRef(biosdev, part);␊ |
997 | ␊ |
998 | if(bvr == NULL)␊ |
999 | return NULL;␊ |
1000 | }␊ |
1001 | else␊ |
1002 | {␊ |
1003 | // Bad device specifier, skip past the right paren.␊ |
1004 | ␊ |
1005 | for ( cp++; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1006 | if (*cp == RP) cp++;␊ |
1007 | // If gRootVolume was NULL, then bvr will be NULL as well which␊ |
1008 | // should be caught by the caller.␊ |
1009 | }␊ |
1010 | ␊ |
1011 | // Returns the file path following the device spec.␊ |
1012 | // e.g. 'hd(1,b)mach_kernel' is reduced to 'mach_kernel'.␊ |
1013 | ␊ |
1014 | *outPath = cp;␊ |
1015 | ␊ |
1016 | return bvr;␊ |
1017 | }␊ |
1018 | ␊ |
1019 | //==========================================================================␊ |
1020 | // Function name is a misnomer as scanBootVolumes usually calls diskScanBootVolumes␊ |
1021 | // which caches the information. So it's only allocated on the first run.␊ |
1022 | static BVRef newBootVolumeRef( int biosdev, int partno )␊ |
1023 | {␊ |
1024 | ␉BVRef bvr, bvr1, bvrChain;␊ |
1025 | ␊ |
1026 | ␉bvr = bvr1 = NULL;␊ |
1027 | ␊ |
1028 | // Try resolving "rd" and "bt" devices first.␊ |
1029 | ␉if (biosdev == kPseudoBIOSDevRAMDisk)␊ |
1030 | ␉{␊ |
1031 | ␉␉if (gRAMDiskVolume)␊ |
1032 | ␉␉ bvr1 = gRAMDiskVolume;␊ |
1033 | ␉}␊ |
1034 | ␉else if (biosdev == kPseudoBIOSDevBooter)␊ |
1035 | ␉{␊ |
1036 | ␉␉if (gRAMDiskVolume != NULL && gRAMDiskBTAliased)␊ |
1037 | ␉␉␉bvr1 = gRAMDiskVolume;␊ |
1038 | ␉␉else␊ |
1039 | ␉␉␉bvr1 = gBIOSBootVolume;␊ |
1040 | ␉}␊ |
1041 | ␉else␊ |
1042 | ␉{␊ |
1043 | ␉␉// Fetch the volume list from the device.␊ |
1044 | ␊ |
1045 | ␉␉scanBootVolumes( biosdev, NULL );␊ |
1046 | ␉␉bvrChain = getBVChainForBIOSDev(biosdev);␊ |
1047 | ␊ |
1048 | ␉␉// Look for a perfect match based on device and partition number.␊ |
1049 | ␊ |
1050 | ␉␉for ( bvr1 = NULL, bvr = bvrChain; bvr; bvr = bvr->next )␊ |
1051 | ␉␉{␊ |
1052 | ␉␉␉if ( ( bvr->flags & kBVFlagNativeBoot ) == 0 ) continue;␊ |
1053 | ␊ |
1054 | ␉␉␉bvr1 = bvr;␊ |
1055 | ␉␉␉if ( bvr->part_no == partno ) break;␊ |
1056 | ␉␉}␊ |
1057 | ␉}␊ |
1058 | ␊ |
1059 | ␉return bvr ? bvr : bvr1;␊ |
1060 | }␊ |
1061 | ␊ |
1062 | //==========================================================================␊ |
1063 | // getDeviceDescription() - Extracts unit number and partition number␊ |
1064 | // from bvr structure into "dw(u,p)" format.␊ |
1065 | // Returns length of the out string␊ |
1066 | int getDeviceDescription(BVRef bvr, char *str)␊ |
1067 | {␊ |
1068 | if(!str)␊ |
1069 | return 0;␊ |
1070 | ␊ |
1071 | ␉*str = '\0';␊ |
1072 | ␊ |
1073 | ␉if (bvr)␊ |
1074 | ␉{␊ |
1075 | const struct devsw *dp = devsw;␊ |
1076 | ␉␉while(dp->name && bvr->biosdev >= dp->biosdev)␊ |
1077 | dp++;␊ |
1078 | ␊ |
1079 | ␉␉dp--;␊ |
1080 | ␉␉if (dp->name)␊ |
1081 | return sprintf(str, "%s(%d,%d)", dp->name, bvr->biosdev - dp->biosdev, bvr->part_no);␊ |
1082 | ␉}␊ |
1083 | ␉␊ |
1084 | ␉return 0;␊ |
1085 | }␊ |
1086 | |