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 "boot.h"␊ |
65 | #include "bootstruct.h"␊ |
66 | #include "disk.h"␊ |
67 | #include "ramdisk.h"␊ |
68 | #include "xml.h"␊ |
69 | #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5␊ |
70 | # include <Kernel/libkern/crypto/md5.h>␊ |
71 | #else␊ |
72 | # include <sys/md5.h>␊ |
73 | #endif␊ |
74 | #include <uuid/uuid.h>␊ |
75 | #if 0 /* No OS X release has ever included this. */␊ |
76 | #include <Kernel/uuid/namespace.h>␊ |
77 | #else␊ |
78 | /* copied from uuid/namespace.h, just like BootX's fs.c does. */␊ |
79 | UUID_DEFINE( kFSUUIDNamespaceSHA1, 0xB3, 0xE2, 0x0F, 0x39, 0xF2, 0x92, 0x11, 0xD6, 0x97, 0xA4, 0x00, 0x30, 0x65, 0x43, 0xEC, 0xAC );␊ |
80 | #endif␊ |
81 | ␊ |
82 | extern int multiboot_partition;␊ |
83 | extern int multiboot_partition_set;␊ |
84 | ␊ |
85 | struct devsw {␊ |
86 | const char * name;␊ |
87 | // size increased from char to short to handle non-BIOS internal devices␊ |
88 | unsigned short biosdev;␊ |
89 | int type;␊ |
90 | };␊ |
91 | ␊ |
92 | // Device entries must be ordered by bios device numbers. ␊ |
93 | static struct devsw devsw[] =␊ |
94 | {␊ |
95 | { "hd", 0x80, kBIOSDevTypeHardDrive }, /* DEV_HD */␊ |
96 | { "en", 0xE0, kBIOSDevTypeNetwork }, /* DEV_EN */␊ |
97 | { "rd", 0x100, kBIOSDevTypeHardDrive },␊ |
98 | { "bt", 0x101, kBIOSDevTypeHardDrive }, // turbo - type for booter partition␊ |
99 | { 0, 0 }␊ |
100 | };␊ |
101 | ␊ |
102 | // Pseudo BIOS devices␊ |
103 | enum {␊ |
104 | ␉kPseudoBIOSDevRAMDisk = 0x100,␊ |
105 | ␉kPseudoBIOSDevBooter = 0x101␊ |
106 | };␊ |
107 | ␊ |
108 | /*␊ |
109 | * Max number of file descriptors.␊ |
110 | */␊ |
111 | #define NFILES 6␊ |
112 | ␊ |
113 | static struct iob iob[NFILES];␊ |
114 | ␊ |
115 | void * gFSLoadAddress = 0;␊ |
116 | ␊ |
117 | // Turbo - save what we think is our original BIOS boot volume if we have one 0xab␊ |
118 | BVRef gBIOSBootVolume = NULL;␊ |
119 | BVRef gBootVolume;␊ |
120 | ␊ |
121 | //static BVRef getBootVolumeRef( const char * path, const char ** outPath );␊ |
122 | static BVRef newBootVolumeRef( int biosdev, int partno );␊ |
123 | ␊ |
124 | //==========================================================================␊ |
125 | // LoadVolumeFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
126 | // Load the specified file from the specified volume␊ |
127 | // to the load buffer at LOAD_ADDR.␊ |
128 | // If the file is fat, load only the i386 portion.␊ |
129 | ␊ |
130 | long LoadVolumeFile(BVRef bvr, const char *filePath)␊ |
131 | {␊ |
132 | long fileSize;␊ |
133 | ␊ |
134 | // Read file into load buffer. The data in the load buffer will be␊ |
135 | // overwritten by the next LoadFile() call.␊ |
136 | ␊ |
137 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
138 | ␊ |
139 | fileSize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
140 | ␊ |
141 | // Return the size of the file, or -1 if load failed.␊ |
142 | ␊ |
143 | return fileSize;␊ |
144 | }␊ |
145 | ␊ |
146 | //==========================================================================␊ |
147 | // LoadFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
148 | // Load the specified file to the load buffer at LOAD_ADDR.␊ |
149 | // If the file is fat, load only the i386 portion.␊ |
150 | ␊ |
151 | long LoadFile(const char * fileSpec)␊ |
152 | {␊ |
153 | const char * filePath;␊ |
154 | BVRef bvr;␊ |
155 | ␊ |
156 | // Resolve the boot volume from the file spec.␊ |
157 | ␊ |
158 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
159 | return -1;␊ |
160 | ␊ |
161 | return LoadVolumeFile(bvr, filePath);␊ |
162 | }␊ |
163 | ␊ |
164 | long ReadFileAtOffset(const char * fileSpec, void *buffer, uint64_t offset, uint64_t length)␊ |
165 | {␊ |
166 | const char *filePath;␊ |
167 | BVRef bvr;␊ |
168 | ␊ |
169 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
170 | return -1;␊ |
171 | ␊ |
172 | if (bvr->fs_readfile == NULL)␊ |
173 | return -1;␊ |
174 | ␊ |
175 | return bvr->fs_readfile(bvr, (char *)filePath, buffer, offset, length);␊ |
176 | }␊ |
177 | ␊ |
178 | long LoadThinFatFile(const char *fileSpec, void **binary)␊ |
179 | {␊ |
180 | const char *filePath;␊ |
181 | FSReadFile readFile;␊ |
182 | BVRef bvr;␊ |
183 | unsigned long length, length2;␊ |
184 | ␊ |
185 | // Resolve the boot volume from the file spec.␊ |
186 | ␊ |
187 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
188 | return -1;␊ |
189 | ␊ |
190 | *binary = (void *)kLoadAddr;␊ |
191 | ␊ |
192 | // Read file into load buffer. The data in the load buffer will be␊ |
193 | // overwritten by the next LoadFile() call.␊ |
194 | ␊ |
195 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
196 | ␊ |
197 | readFile = bvr->fs_readfile;␊ |
198 | ␊ |
199 | if (readFile != NULL) {␊ |
200 | // Read the first 4096 bytes (fat header)␊ |
201 | length = readFile(bvr, (char *)filePath, *binary, 0, 0x1000);␊ |
202 | if (length > 0) {␊ |
203 | if (ThinFatFile(binary, &length) == 0) {␊ |
204 | ␉␉␉␉if (length == 0)␊ |
205 | ␉␉␉␉␉return 0;␊ |
206 | // We found a fat binary; read only the thin part␊ |
207 | length = readFile(bvr, (char *)filePath,␊ |
208 | (void *)kLoadAddr, (unsigned long)(*binary) - kLoadAddr, length);␊ |
209 | *binary = (void *)kLoadAddr;␊ |
210 | } else {␊ |
211 | // Not a fat binary; read the rest of the file␊ |
212 | length2 = readFile(bvr, (char *)filePath, (void *)(kLoadAddr + length), length, 0);␊ |
213 | if (length2 == -1) return -1;␊ |
214 | length += length2;␊ |
215 | }␊ |
216 | }␊ |
217 | } else {␊ |
218 | length = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
219 | if (length > 0) {␊ |
220 | ThinFatFile(binary, &length);␊ |
221 | }␊ |
222 | }␊ |
223 | ␊ |
224 | return length;␊ |
225 | }␊ |
226 | ␊ |
227 | #if UNUSED␊ |
228 | long GetFSUUID(char *spec, char *uuidStr)␊ |
229 | {␊ |
230 | BVRef bvr;␊ |
231 | long rval = -1;␊ |
232 | const char *devSpec;␊ |
233 | ␊ |
234 | if ((bvr = getBootVolumeRef(spec, &devSpec)) == NULL)␊ |
235 | return -1;␊ |
236 | ␊ |
237 | if(bvr->fs_getuuid)␊ |
238 | rval = bvr->fs_getuuid(bvr, uuidStr);␊ |
239 | ␊ |
240 | return rval;␊ |
241 | }␊ |
242 | #endif␊ |
243 | ␊ |
244 | // filesystem-specific getUUID functions call this shared string generator␊ |
245 | long CreateUUIDString(uint8_t uubytes[], int nbytes, char *uuidStr)␊ |
246 | {␊ |
247 | unsigned fmtbase, fmtidx, i;␊ |
248 | uint8_t uuidfmt[] = { 4, 2, 2, 2, 6 };␊ |
249 | char *p = uuidStr;␊ |
250 | MD5_CTX md5c;␊ |
251 | uint8_t mdresult[16];␊ |
252 | ␊ |
253 | bzero(mdresult, sizeof(mdresult));␊ |
254 | ␊ |
255 | // just like AppleFileSystemDriver␊ |
256 | MD5Init(&md5c);␊ |
257 | MD5Update(&md5c, kFSUUIDNamespaceSHA1, sizeof(kFSUUIDNamespaceSHA1));␊ |
258 | MD5Update(&md5c, uubytes, nbytes);␊ |
259 | MD5Final(mdresult, &md5c);␊ |
260 | ␊ |
261 | // this UUID has been made version 3 style (i.e. via namespace)␊ |
262 | // see "-uuid-urn-" IETF draft (which otherwise copies byte for byte)␊ |
263 | mdresult[6] = 0x30 | ( mdresult[6] & 0x0F );␊ |
264 | mdresult[8] = 0x80 | ( mdresult[8] & 0x3F );␊ |
265 | ␊ |
266 | ␊ |
267 | // generate the text: e.g. 5EB1869F-C4FA-3502-BDEB-3B8ED5D87292␊ |
268 | i = 0; fmtbase = 0;␊ |
269 | for(fmtidx = 0; fmtidx < sizeof(uuidfmt); fmtidx++) {␊ |
270 | for(i=0; i < uuidfmt[fmtidx]; i++) {␊ |
271 | uint8_t byte = mdresult[fmtbase+i];␊ |
272 | char nib;␊ |
273 | ␊ |
274 | nib = byte >> 4;␊ |
275 | *p = nib + '0'; // 0x4 -> '4'␊ |
276 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
277 | p++;␊ |
278 | ␊ |
279 | nib = byte & 0xf;␊ |
280 | *p = nib + '0'; // 0x4 -> '4'␊ |
281 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
282 | p++;␊ |
283 | ␊ |
284 | }␊ |
285 | fmtbase += i;␊ |
286 | if(fmtidx < sizeof(uuidfmt)-1)␊ |
287 | *(p++) = '-';␊ |
288 | else␊ |
289 | *p = '\0';␊ |
290 | }␊ |
291 | ␊ |
292 | return 0;␊ |
293 | }␊ |
294 | ␊ |
295 | ␊ |
296 | //==========================================================================␊ |
297 | // GetDirEntry - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
298 | // Fetch the next directory entry for the given directory.␊ |
299 | ␊ |
300 | long GetDirEntry(const char * dirSpec, long long * dirIndex, const char ** name, ␊ |
301 | long * flags, long * time)␊ |
302 | {␊ |
303 | const char * dirPath;␊ |
304 | BVRef bvr;␊ |
305 | ␊ |
306 | // Resolve the boot volume from the dir spec.␊ |
307 | ␊ |
308 | if ((bvr = getBootVolumeRef(dirSpec, &dirPath)) == NULL)␊ |
309 | return -1;␊ |
310 | ␊ |
311 | // Return 0 on success, or -1 if there are no additional entries.␊ |
312 | ␊ |
313 | return bvr->fs_getdirentry( bvr,␊ |
314 | /* dirPath */ (char *)dirPath,␊ |
315 | /* dirIndex */ dirIndex,␊ |
316 | /* dirEntry */ (char **)name, flags, time, 0, 0 );␊ |
317 | }␊ |
318 | ␊ |
319 | //==========================================================================␊ |
320 | // GetFileInfo - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
321 | // Get attributes for the specified file.␊ |
322 | ␊ |
323 | static char* gMakeDirSpec;␊ |
324 | ␊ |
325 | long GetFileInfo(const char * dirSpec, const char * name,␊ |
326 | long * flags, long * time)␊ |
327 | {␊ |
328 | long long index = 0;␊ |
329 | const char * entryName;␊ |
330 | ␊ |
331 | if (gMakeDirSpec == 0)␊ |
332 | gMakeDirSpec = (char *)malloc(1024);␊ |
333 | ␊ |
334 | if (!dirSpec) {␊ |
335 | long idx, len;␊ |
336 | ␊ |
337 | len = strlen(name);␊ |
338 | ␊ |
339 | for (idx = len; idx && (name[idx] != '/' && name[idx] != '\\'); idx--) {}␊ |
340 | if (idx == 0) {␊ |
341 | gMakeDirSpec[0] = '/';␊ |
342 | gMakeDirSpec[1] = '\0';␊ |
343 | } else {␊ |
344 | idx++;␊ |
345 | strncpy(gMakeDirSpec, name, idx);␊ |
346 | name += idx;␊ |
347 | }␊ |
348 | dirSpec = gMakeDirSpec;␊ |
349 | }␊ |
350 | ␊ |
351 | while (GetDirEntry(dirSpec, &index, &entryName, flags, time) == 0)␊ |
352 | {␊ |
353 | if (strcmp(entryName, name) == 0)␊ |
354 | return 0; // success␊ |
355 | }␊ |
356 | return -1; // file not found␊ |
357 | }␊ |
358 | ␊ |
359 | long GetFileBlock(const char *fileSpec, unsigned long long *firstBlock)␊ |
360 | {␊ |
361 | const char * filePath;␊ |
362 | BVRef bvr;␊ |
363 | ␊ |
364 | // Resolve the boot volume from the file spec.␊ |
365 | ␊ |
366 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL) {␊ |
367 | printf("Boot volume for '%s' is bogus\n", fileSpec);␊ |
368 | return -1;␊ |
369 | }␊ |
370 | ␊ |
371 | return bvr->fs_getfileblock(bvr, (char *)filePath, firstBlock);␊ |
372 | }␊ |
373 | ␊ |
374 | //==========================================================================␊ |
375 | // GetFreeFD()␊ |
376 | ␊ |
377 | static int GetFreeFd(void)␊ |
378 | {␊ |
379 | ␉int␉fd;␊ |
380 | ␊ |
381 | ␉// Locate a free descriptor slot.␊ |
382 | ␉for (fd = 0; fd < NFILES; fd++) {␊ |
383 | ␉␉if (iob[fd].i_flgs == 0) {␊ |
384 | ␉␉␉return fd;␊ |
385 | ␉ ␉}␊ |
386 | ␉}␊ |
387 | ␉stop("Out of file descriptors");␊ |
388 | ␉// not reached␊ |
389 | ␉return -1;␊ |
390 | }␊ |
391 | ␊ |
392 | //==========================================================================␊ |
393 | // iob_from_fdesc()␊ |
394 | //␊ |
395 | // Return a pointer to an allocated 'iob' based on the file descriptor␊ |
396 | // provided. Returns NULL if the file descriptor given is invalid.␊ |
397 | ␊ |
398 | static struct iob * iob_from_fdesc(int fdesc)␊ |
399 | {␊ |
400 | register struct iob * io;␊ |
401 | ␊ |
402 | if (fdesc < 0 || fdesc >= NFILES ||␊ |
403 | ((io = &iob[fdesc])->i_flgs & F_ALLOC) == 0)␊ |
404 | return NULL;␊ |
405 | else␊ |
406 | return io;␊ |
407 | }␊ |
408 | ␊ |
409 | //==========================================================================␊ |
410 | // openmem()␊ |
411 | ␊ |
412 | int openmem(char * buf, int len)␊ |
413 | {␊ |
414 | int fdesc;␊ |
415 | struct iob * io;␊ |
416 | ␊ |
417 | fdesc = GetFreeFd();␊ |
418 | io = &iob[fdesc];␊ |
419 | bzero(io, sizeof(*io));␊ |
420 | ␊ |
421 | // Mark the descriptor as taken. Set the F_MEM flag to indicate␊ |
422 | // that the file buffer is provided by the caller.␊ |
423 | ␊ |
424 | io->i_flgs = F_ALLOC | F_MEM;␊ |
425 | io->i_buf = buf;␊ |
426 | io->i_filesize = len;␊ |
427 | ␊ |
428 | return fdesc;␊ |
429 | }␊ |
430 | ␊ |
431 | //==========================================================================␊ |
432 | // open() - Open the file specified by 'path' for reading.␊ |
433 | ␊ |
434 | static int open_bvr(BVRef bvr, const char *filePath, int flags)␊ |
435 | {␊ |
436 | ␉struct iob␉*io;␊ |
437 | ␉int␉␉fdesc;␊ |
438 | ␉int␉␉i;␊ |
439 | ␊ |
440 | ␉if (bvr == NULL) {␊ |
441 | ␉␉return -1;␊ |
442 | ␉}␊ |
443 | ␊ |
444 | ␉fdesc = GetFreeFd();␊ |
445 | ␉io = &iob[fdesc];␊ |
446 | ␉bzero(io, sizeof(*io));␊ |
447 | ␊ |
448 | ␉// Mark the descriptor as taken.␊ |
449 | ␉io->i_flgs = F_ALLOC;␊ |
450 | ␊ |
451 | ␉// Find the next available memory block in the download buffer.␊ |
452 | ␉io->i_buf = (char *) LOAD_ADDR;␊ |
453 | ␉for (i = 0; i < NFILES; i++) {␊ |
454 | ␉␉if ((iob[i].i_flgs != F_ALLOC) || (i == fdesc)) {␊ |
455 | ␉␉␉continue;␊ |
456 | ␉␉}␊ |
457 | ␉␉io->i_buf = max(iob[i].i_filesize + iob[i].i_buf, io->i_buf);␊ |
458 | ␉}␊ |
459 | ␊ |
460 | ␉// Load entire file into memory. Unnecessary open() calls must be avoided.␊ |
461 | ␉gFSLoadAddress = io->i_buf;␊ |
462 | ␉io->i_filesize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
463 | ␉if (io->i_filesize < 0) {␊ |
464 | ␉␉close(fdesc);␊ |
465 | ␉␉return -1;␊ |
466 | ␉}␊ |
467 | ␉return fdesc;␊ |
468 | }␊ |
469 | ␊ |
470 | int open(const char *path, int flags)␊ |
471 | {␊ |
472 | ␉const char␉*filepath;␊ |
473 | ␉BVRef␉␉bvr;␊ |
474 | ␊ |
475 | ␉// Resolve the boot volume from the file spec.␊ |
476 | ␉if ((bvr = getBootVolumeRef(path, &filepath)) != NULL) {␊ |
477 | ␉␉return open_bvr(bvr, filepath, flags);␊ |
478 | ␉}␊ |
479 | ␉return -1;␊ |
480 | }␊ |
481 | ␊ |
482 | int open_bvdev(const char *bvd, const char *path, int flags)␊ |
483 | {␊ |
484 | const struct devsw␉*dp;␊ |
485 | ␉const char␉␉*cp;␊ |
486 | ␉BVRef␉␉␉bvr;␊ |
487 | ␉int␉␉␉i;␊ |
488 | ␉int␉␉␉len;␊ |
489 | ␉int␉␉␉unit;␊ |
490 | ␉int␉␉␉partition;␊ |
491 | ␊ |
492 | ␉if ((i = open(path, flags)) >= 0) {␊ |
493 | ␉␉return i;␊ |
494 | ␉}␊ |
495 | ␊ |
496 | ␉if (bvd == NULL || (len = strlen(bvd)) < 2) {␊ |
497 | ␉␉return -1;␊ |
498 | ␉}␊ |
499 | ␊ |
500 | ␉for (dp=devsw; dp->name; dp++) {␊ |
501 | ␉␉if (bvd[0] == dp->name[0] && bvd[1] == dp->name[1]) {␊ |
502 | ␉␉␉unit = 0;␊ |
503 | ␉␉␉partition = 0;␊ |
504 | ␉␉␉/* get optional unit and partition */␊ |
505 | ␉␉␉if (len >= 5 && bvd[2] == '(') { /* min must be present xx(0) */␊ |
506 | ␉␉␉␉cp = &bvd[3];␊ |
507 | ␉␉␉␉i = 0;␊ |
508 | ␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
509 | ␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
510 | ␉␉␉␉␉unit = i;␊ |
511 | ␉␉␉␉}␊ |
512 | ␉␉␉␉if (*cp++ == ',') {␊ |
513 | ␉␉␉␉␉i = 0;␊ |
514 | ␉␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
515 | ␉␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
516 | ␉␉␉␉␉␉partition = i;␊ |
517 | ␉␉␉␉␉}␊ |
518 | ␉␉␉␉}␊ |
519 | ␉␉␉}␊ |
520 | ␉␉␉bvr = newBootVolumeRef(dp->biosdev + unit, partition);␊ |
521 | ␉␉␉return open_bvr(bvr, path, flags);␊ |
522 | ␉␉}␊ |
523 | }␊ |
524 | ␉return -1;␊ |
525 | }␊ |
526 | ␊ |
527 | //==========================================================================␊ |
528 | // close() - Close a file descriptor.␊ |
529 | ␊ |
530 | int close(int fdesc)␊ |
531 | {␊ |
532 | struct iob * io;␊ |
533 | ␊ |
534 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
535 | return (-1);␊ |
536 | ␊ |
537 | io->i_flgs = 0;␊ |
538 | ␊ |
539 | return 0;␊ |
540 | }␊ |
541 | ␊ |
542 | //==========================================================================␊ |
543 | // lseek() - Reposition the byte offset of the file descriptor from the␊ |
544 | // beginning of the file. Returns the relocated offset.␊ |
545 | ␊ |
546 | int b_lseek(int fdesc, int offset, int ptr)␊ |
547 | {␊ |
548 | struct iob * io;␊ |
549 | ␊ |
550 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
551 | return (-1);␊ |
552 | ␊ |
553 | io->i_offset = offset;␊ |
554 | ␊ |
555 | return offset;␊ |
556 | }␊ |
557 | ␊ |
558 | //==========================================================================␊ |
559 | // tell() - Returns the byte offset of the file descriptor.␊ |
560 | ␊ |
561 | int tell(int fdesc)␊ |
562 | {␊ |
563 | struct iob * io;␊ |
564 | ␊ |
565 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
566 | return 0;␊ |
567 | ␊ |
568 | return io->i_offset;␊ |
569 | }␊ |
570 | ␊ |
571 | //==========================================================================␊ |
572 | // read() - Read up to 'count' bytes of data from the file descriptor␊ |
573 | // into the buffer pointed to by buf.␊ |
574 | ␊ |
575 | int read(int fdesc, char * buf, int count)␊ |
576 | {␊ |
577 | struct iob * io;␊ |
578 | ␊ |
579 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
580 | return (-1);␊ |
581 | ␊ |
582 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
583 | count = io->i_filesize - io->i_offset;␊ |
584 | ␊ |
585 | if (count <= 0)␊ |
586 | return 0; // end of file␊ |
587 | ␊ |
588 | bcopy(io->i_buf + io->i_offset, buf, count);␊ |
589 | ␊ |
590 | io->i_offset += count;␊ |
591 | ␊ |
592 | return count;␊ |
593 | }␊ |
594 | ␊ |
595 | //==========================================================================␊ |
596 | // write() - Write up to 'count' bytes of data to the file descriptor␊ |
597 | // from the buffer pointed to by buf.␊ |
598 | ␊ |
599 | int write(int fdesc, const char * buf, int count)␊ |
600 | {␊ |
601 | struct iob * io;␊ |
602 | ␊ |
603 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
604 | return (-1);␊ |
605 | ␉␊ |
606 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
607 | count = io->i_filesize - io->i_offset;␊ |
608 | ␉␊ |
609 | if (count <= 0)␊ |
610 | return 0; // end of file␊ |
611 | ␉␊ |
612 | bcopy(buf, io->i_buf + io->i_offset, count);␊ |
613 | ␉␊ |
614 | io->i_offset += count;␊ |
615 | ␉␊ |
616 | return count;␊ |
617 | }␊ |
618 | ␊ |
619 | int writebyte(int fdesc, char value)␊ |
620 | {␊ |
621 | struct iob * io;␊ |
622 | ␊ |
623 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
624 | return (-1);␊ |
625 | ␉␊ |
626 | if ((io->i_offset + 1) > (unsigned int)io->i_filesize)␊ |
627 | return 0; // end of file␊ |
628 | ␉␊ |
629 | io->i_buf[io->i_offset++] = value;␊ |
630 | ␉␊ |
631 | return 1;␊ |
632 | }␊ |
633 | ␊ |
634 | int writeint(int fdesc, int value)␊ |
635 | {␊ |
636 | struct iob * io;␊ |
637 | ␊ |
638 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
639 | return (-1);␊ |
640 | ␉␊ |
641 | if ((io->i_offset + 4) > (unsigned int)io->i_filesize)␊ |
642 | return 0; // end of file␊ |
643 | ␉␊ |
644 | bcopy(&value, io->i_buf + io->i_offset, 4);␊ |
645 | ␉␊ |
646 | io->i_offset += 4;␊ |
647 | ␉␊ |
648 | return 4;␊ |
649 | }␊ |
650 | ␊ |
651 | //==========================================================================␊ |
652 | // file_size() - Returns the size of the file described by the file␊ |
653 | // descriptor.␊ |
654 | ␊ |
655 | int file_size(int fdesc)␊ |
656 | {␊ |
657 | struct iob * io;␊ |
658 | ␊ |
659 | if ((io = iob_from_fdesc(fdesc)) == 0)␊ |
660 | return 0;␊ |
661 | ␊ |
662 | return io->i_filesize;␊ |
663 | }␊ |
664 | ␊ |
665 | //==========================================================================␊ |
666 | ␊ |
667 | struct dirstuff * vol_opendir(BVRef bvr, const char * path)␊ |
668 | {␊ |
669 | struct dirstuff * dirp = 0;␊ |
670 | ␊ |
671 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
672 | if (dirp == NULL)␊ |
673 | goto error;␊ |
674 | ␊ |
675 | dirp->dir_path = newString(path);␊ |
676 | if (dirp->dir_path == NULL)␊ |
677 | goto error;␊ |
678 | ␊ |
679 | dirp->dir_bvr = bvr;␊ |
680 | ␊ |
681 | return dirp;␊ |
682 | ␊ |
683 | error:␊ |
684 | closedir(dirp);␊ |
685 | return NULL;␊ |
686 | }␊ |
687 | ␊ |
688 | //==========================================================================␊ |
689 | ␊ |
690 | struct dirstuff * opendir(const char * path)␊ |
691 | {␊ |
692 | struct dirstuff * dirp = 0;␊ |
693 | const char * dirPath;␊ |
694 | BVRef bvr;␊ |
695 | ␊ |
696 | if ((bvr = getBootVolumeRef(path, &dirPath)) == NULL)␊ |
697 | goto error;␊ |
698 | ␊ |
699 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
700 | if (dirp == NULL)␊ |
701 | goto error;␊ |
702 | ␊ |
703 | dirp->dir_path = newString(dirPath);␊ |
704 | if (dirp->dir_path == NULL)␊ |
705 | goto error;␊ |
706 | ␊ |
707 | dirp->dir_bvr = bvr;␊ |
708 | ␊ |
709 | return dirp;␊ |
710 | ␊ |
711 | error:␊ |
712 | closedir(dirp);␊ |
713 | return NULL;␊ |
714 | }␊ |
715 | ␊ |
716 | //==========================================================================␊ |
717 | ␊ |
718 | int closedir(struct dirstuff * dirp)␊ |
719 | {␊ |
720 | if (dirp) {␊ |
721 | if (dirp->dir_path) free(dirp->dir_path);␊ |
722 | free(dirp);␊ |
723 | }␊ |
724 | return 0;␊ |
725 | }␊ |
726 | ␊ |
727 | //==========================================================================␊ |
728 | ␊ |
729 | int readdir(struct dirstuff * dirp, const char ** name, long * flags,␊ |
730 | long * time)␊ |
731 | {␊ |
732 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
733 | /* dirPath */ dirp->dir_path,␊ |
734 | /* dirIndex */ &dirp->dir_index,␊ |
735 | /* dirEntry */ (char **)name, flags, time,␊ |
736 | 0, 0);␊ |
737 | }␊ |
738 | ␊ |
739 | //==========================================================================␊ |
740 | ␊ |
741 | int readdir_ext(struct dirstuff * dirp, const char ** name, long * flags,␊ |
742 | long * time, FinderInfo *finderInfo, long *infoValid)␊ |
743 | {␊ |
744 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
745 | /* dirPath */ dirp->dir_path,␊ |
746 | /* dirIndex */ &dirp->dir_index,␊ |
747 | /* dirEntry */ (char **)name,␊ |
748 | flags, time,␊ |
749 | finderInfo, infoValid);␊ |
750 | }␊ |
751 | ␊ |
752 | //==========================================================================␊ |
753 | ␊ |
754 | const char * systemConfigDir()␊ |
755 | {␊ |
756 | if (gBootFileType == kNetworkDeviceType)␊ |
757 | ␉return "";␊ |
758 | return "/Library/Preferences/SystemConfiguration";␊ |
759 | }␊ |
760 | ␊ |
761 | //==========================================================================␊ |
762 | ␊ |
763 | int gBootFileType;␊ |
764 | ␊ |
765 | void scanBootVolumes( int biosdev, int * count )␊ |
766 | {␊ |
767 | BVRef bvr = 0;␊ |
768 | ␊ |
769 | bvr = diskScanBootVolumes(biosdev, count);␊ |
770 | if (bvr == NULL)␊ |
771 | {␊ |
772 | bvr = nbpScanBootVolumes(biosdev, count);␊ |
773 | if (bvr != NULL)␊ |
774 | {␊ |
775 | gBootFileType = kNetworkDeviceType;␊ |
776 | }␊ |
777 | }␊ |
778 | else␊ |
779 | {␊ |
780 | gBootFileType = kBlockDeviceType;␊ |
781 | }␊ |
782 | }␊ |
783 | ␊ |
784 | //==========================================================================␊ |
785 | ␊ |
786 | void scanDisks(int biosdev, int *count)␊ |
787 | {␊ |
788 | #define MAX_HDD_COUNT 32␊ |
789 | int bvCount;␊ |
790 | int hd = 0;␊ |
791 | ␊ |
792 | // Testing up to MAX_HDD_COUNT hard drives.␊ |
793 | ␉while(!testBiosread(0x80 + hd, 0) && hd < MAX_HDD_COUNT)␊ |
794 | ␉{␊ |
795 | ␉ bvCount = 0;␊ |
796 | ␉ scanBootVolumes(0x80 + hd, &bvCount);␊ |
797 | hd++;␊ |
798 | ␉}␊ |
799 | ␊ |
800 | // Also scanning CD/DVD drive.␊ |
801 | ␉if (biosDevIsCDROM(gBIOSDev))␊ |
802 | ␉{␊ |
803 | ␉ bvCount = 0;␊ |
804 | ␉scanBootVolumes(gBIOSDev, &bvCount);␊ |
805 | ␉}␊ |
806 | }␊ |
807 | ␊ |
808 | //==========================================================================␊ |
809 | ␊ |
810 | BVRef selectBootVolume( BVRef chain )␊ |
811 | {␊ |
812 | ␉bool filteredChain = false;␊ |
813 | ␉bool foundPrimary = false;␊ |
814 | ␉BVRef bvr, bvr1 = 0, bvr2 = 0;␊ |
815 | ␉␊ |
816 | ␉if (chain->filtered) filteredChain = true;␊ |
817 | ␉␊ |
818 | ␉if (multiboot_partition_set)␊ |
819 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
820 | ␉␉␉if ( bvr->part_no == multiboot_partition && bvr->biosdev == gBIOSDev ) ␊ |
821 | ␉␉␉␉return bvr;␊ |
822 | ␉␊ |
823 | ␉/*␊ |
824 | ␉ * Checking "Default Partition" key in system configuration - use format: hd(x,y), the volume UUID or label -␊ |
825 | ␉ * to override the default selection.␊ |
826 | ␉ * We accept only kBVFlagSystemVolume or kBVFlagForeignBoot volumes.␊ |
827 | ␉ */␊ |
828 | ␉char *val = XMLDecode(getStringForKey(kDefaultPartition, &bootInfo->bootConfig));␊ |
829 | if (val) {␊ |
830 | for ( bvr = chain; bvr; bvr = bvr->next ) {␊ |
831 | if (matchVolumeToString(bvr, val, false)) {␊ |
832 | free(val);␊ |
833 | return bvr;␊ |
834 | }␊ |
835 | }␊ |
836 | free(val);␊ |
837 | }␊ |
838 | ␉␊ |
839 | ␉/*␊ |
840 | ␉ * Scannig the volume chain backwards and trying to find ␊ |
841 | ␉ * a HFS+ volume with valid boot record signature.␊ |
842 | ␉ * If not found any active partition then we will␊ |
843 | ␉ * select this volume as the boot volume.␊ |
844 | ␉ */␊ |
845 | ␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
846 | ␉{␊ |
847 | ␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) foundPrimary = true;␊ |
848 | ␉␉// zhell -- Undo a regression that was introduced from r491 to 492.␊ |
849 | ␉␉// if gBIOSBootVolume is set already, no change is required␊ |
850 | ␉␉if ( bvr->flags & (kBVFlagBootable|kBVFlagSystemVolume)␊ |
851 | ␉␉␉&& gBIOSBootVolume␊ |
852 | ␉␉␉&& (!filteredChain || (filteredChain && bvr->visible))␊ |
853 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
854 | ␉␉␉bvr2 = bvr;␊ |
855 | ␉␉// zhell -- if gBIOSBootVolume is NOT set, we use the "if" statement␊ |
856 | ␉␉// from r491,␊ |
857 | ␉␉if ( bvr->flags & kBVFlagBootable␊ |
858 | ␉␉␉&& ! gBIOSBootVolume␊ |
859 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
860 | ␉␉␉bvr2 = bvr;␊ |
861 | ␉} ␊ |
862 | ␉␊ |
863 | ␉␊ |
864 | ␉/*␊ |
865 | ␉ * Use the standrad method for selecting the boot volume.␊ |
866 | ␉ */␊ |
867 | ␉if (foundPrimary)␊ |
868 | ␉{␊ |
869 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
870 | ␉␉{␊ |
871 | ␉␉␉if ( bvr->flags & kBVFlagNativeBoot && bvr->biosdev == gBIOSDev ) bvr1 = bvr;␊ |
872 | ␉␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) bvr2 = bvr;␊ |
873 | ␉␉}␊ |
874 | ␉}␊ |
875 | ␉␊ |
876 | ␉bvr = bvr2 ? bvr2 :␊ |
877 | ␉bvr1 ? bvr1 : chain;␊ |
878 | ␉␊ |
879 | ␉return bvr;␊ |
880 | }␊ |
881 | ␊ |
882 | //==========================================================================␊ |
883 | ␊ |
884 | #define LP '('␊ |
885 | #define RP ')'␊ |
886 | int gBIOSDev;␊ |
887 | ␊ |
888 | /*!␊ |
889 | This is like boot2's gBootVolume except it is for the internal use of␊ |
890 | libsaio to track which volume an unqualified path should be relative to.␊ |
891 | This replaces bootInfo->kernDev as the carrier of this information.␊ |
892 | */␊ |
893 | static BVRef gRootVolume;␊ |
894 | ␊ |
895 | void setRootVolume(BVRef volume)␊ |
896 | {␊ |
897 | gRootVolume = volume;␊ |
898 | // Veto non-native FS. Basically that means don't allow the root volume to␊ |
899 | // be set to a volume we can't read files from.␊ |
900 | if(gRootVolume != NULL && ((gRootVolume->flags & kBVFlagNativeBoot) == 0))␊ |
901 | gRootVolume = NULL;␊ |
902 | }␊ |
903 | ␊ |
904 | void setBootGlobals(BVRef chain)␊ |
905 | {␊ |
906 | // Record default boot device.␊ |
907 | gBootVolume = selectBootVolume(chain);␊ |
908 | ␊ |
909 | // turbo - Save the ORIGINAL boot volume too for loading our mkext␊ |
910 | if (!gBIOSBootVolume) gBIOSBootVolume = gBootVolume;␊ |
911 | ␊ |
912 | setRootVolume(gBootVolume);␉␊ |
913 | }␊ |
914 | ␊ |
915 | /*!␊ |
916 | Extracts the volume selector from the pathname, returns the selected␊ |
917 | BVRef, and sets *outPath to the remainder of the path.␊ |
918 | If the path did not include a volume selector then the current volume␊ |
919 | is used. When called with a volume selector the current volume␊ |
920 | is changed to the selected volume unless the volume selector is␊ |
921 | that of a ramdisk.␊ |
922 | */␊ |
923 | BVRef getBootVolumeRef( const char * path, const char ** outPath )␊ |
924 | {␊ |
925 | const char * cp;␊ |
926 | BVRef bvr = gRootVolume;␊ |
927 | int biosdev = gBIOSDev;␊ |
928 | ␊ |
929 | // Search for left parenthesis in the path specification.␊ |
930 | ␊ |
931 | for (cp = path; *cp; cp++) {␊ |
932 | if (*cp == LP || *cp == '/') break;␊ |
933 | }␊ |
934 | ␊ |
935 | if (*cp != LP) // no left paren found␊ |
936 | {␊ |
937 | // Path is using the implicit current device so if there is␊ |
938 | // no current device, then we must fail.␊ |
939 | cp = path;␊ |
940 | if ( gRootVolume == NULL )␊ |
941 | return NULL;␊ |
942 | }␊ |
943 | else if ((cp - path) == 2) // found "xx("␊ |
944 | {␊ |
945 | const struct devsw * dp;␊ |
946 | const char * xp = path;␊ |
947 | int i;␊ |
948 | int unit = -1;␊ |
949 | int part = -1;␊ |
950 | ␊ |
951 | cp++;␊ |
952 | ␊ |
953 | // Check the 2 character device name pointed by 'xp'.␊ |
954 | ␊ |
955 | for (dp = devsw; dp->name; dp++)␊ |
956 | {␊ |
957 | if ((xp[0] == dp->name[0]) && (xp[1] == dp->name[1]))␊ |
958 | break; // found matching entry␊ |
959 | }␊ |
960 | if (dp->name == NULL)␊ |
961 | {␊ |
962 | error("Unknown device '%c%c'\n", xp[0], xp[1]);␊ |
963 | return NULL;␊ |
964 | }␊ |
965 | ␊ |
966 | // Extract the optional unit number from the specification.␊ |
967 | // hd(unit) or hd(unit, part).␊ |
968 | ␊ |
969 | i = 0;␊ |
970 | while (*cp >= '0' && *cp <= '9')␊ |
971 | {␊ |
972 | i = i * 10 + *cp++ - '0';␊ |
973 | unit = i;␊ |
974 | }␊ |
975 | ␊ |
976 | // Unit is no longer optional and never really was.␊ |
977 | // If the user failed to specify it then the unit number from the previous kernDev␊ |
978 | // would have been used which makes little sense anyway.␊ |
979 | // For example, if the user did fd()/foobar and the current root device was the␊ |
980 | // second hard disk (i.e. unit 1) then fd() would select the second floppy drive!␊ |
981 | if(unit == -1)␊ |
982 | return NULL;␊ |
983 | ␊ |
984 | // Extract the optional partition number from the specification.␊ |
985 | ␊ |
986 | if (*cp == ',')␊ |
987 | part = atoi(++cp);␊ |
988 | ␊ |
989 | // If part is not specified part will be -1 whereas before it would have been␊ |
990 | // whatever the last partition was which makes about zero sense if the device␊ |
991 | // has been switched.␊ |
992 | ␊ |
993 | // Skip past the right paren.␊ |
994 | ␊ |
995 | for ( ; *cp && *cp != RP; cp++) /* LOOP */;␊ |
996 | if (*cp == RP) cp++;␊ |
997 | ␊ |
998 | biosdev = dp->biosdev + unit;␊ |
999 | bvr = newBootVolumeRef(biosdev, part);␊ |
1000 | ␊ |
1001 | if(bvr == NULL)␊ |
1002 | return NULL;␊ |
1003 | }␊ |
1004 | else␊ |
1005 | {␊ |
1006 | // Bad device specifier, skip past the right paren.␊ |
1007 | ␊ |
1008 | for ( cp++; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1009 | if (*cp == RP) cp++;␊ |
1010 | // If gRootVolume was NULL, then bvr will be NULL as well which␊ |
1011 | // should be caught by the caller.␊ |
1012 | }␊ |
1013 | ␊ |
1014 | // Returns the file path following the device spec.␊ |
1015 | // e.g. 'hd(1,b)mach_kernel' is reduced to 'mach_kernel'.␊ |
1016 | ␊ |
1017 | *outPath = cp;␊ |
1018 | ␊ |
1019 | return bvr;␊ |
1020 | }␊ |
1021 | ␊ |
1022 | //==========================================================================␊ |
1023 | // Function name is a misnomer as scanBootVolumes usually calls diskScanBootVolumes␊ |
1024 | // which caches the information. So it's only allocated on the first run.␊ |
1025 | static BVRef newBootVolumeRef( int biosdev, int partno )␊ |
1026 | {␊ |
1027 | ␉BVRef bvr, bvr1, bvrChain;␊ |
1028 | ␊ |
1029 | ␉bvr = bvr1 = NULL;␊ |
1030 | ␊ |
1031 | // Try resolving "rd" and "bt" devices first.␊ |
1032 | ␉if (biosdev == kPseudoBIOSDevRAMDisk)␊ |
1033 | ␉{␊ |
1034 | ␉␉if (gRAMDiskVolume)␊ |
1035 | ␉␉ bvr1 = gRAMDiskVolume;␊ |
1036 | ␉}␊ |
1037 | ␉else if (biosdev == kPseudoBIOSDevBooter)␊ |
1038 | ␉{␊ |
1039 | ␉␉if (gRAMDiskVolume != NULL && gRAMDiskBTAliased)␊ |
1040 | ␉␉␉bvr1 = gRAMDiskVolume;␊ |
1041 | ␉␉else␊ |
1042 | ␉␉␉bvr1 = gBIOSBootVolume;␊ |
1043 | ␉}␊ |
1044 | ␉else␊ |
1045 | ␉{␊ |
1046 | ␉␉// Fetch the volume list from the device.␊ |
1047 | ␊ |
1048 | ␉␉scanBootVolumes( biosdev, NULL );␊ |
1049 | ␉␉bvrChain = getBVChainForBIOSDev(biosdev);␊ |
1050 | ␊ |
1051 | ␉␉// Look for a perfect match based on device and partition number.␊ |
1052 | ␊ |
1053 | ␉␉for ( bvr1 = NULL, bvr = bvrChain; bvr; bvr = bvr->next )␊ |
1054 | ␉␉{␊ |
1055 | ␉␉␉if ( ( bvr->flags & kBVFlagNativeBoot ) == 0 ) continue;␊ |
1056 | ␊ |
1057 | ␉␉␉bvr1 = bvr;␊ |
1058 | ␉␉␉if ( bvr->part_no == partno ) break;␊ |
1059 | ␉␉}␊ |
1060 | ␉}␊ |
1061 | ␊ |
1062 | ␉return bvr ? bvr : bvr1;␊ |
1063 | }␊ |
1064 | ␊ |
1065 | //==========================================================================␊ |
1066 | // getDeviceDescription() - Extracts unit number and partition number␊ |
1067 | // from bvr structure into "dw(u,p)" format.␊ |
1068 | // Returns length of the out string␊ |
1069 | int getDeviceDescription(BVRef bvr, char *str)␊ |
1070 | {␊ |
1071 | if(!str)␊ |
1072 | return 0;␊ |
1073 | ␊ |
1074 | ␉*str = '\0';␊ |
1075 | ␊ |
1076 | ␉if (bvr)␊ |
1077 | ␉{␊ |
1078 | const struct devsw *dp = devsw;␊ |
1079 | ␉␉while(dp->name && bvr->biosdev >= dp->biosdev)␊ |
1080 | dp++;␊ |
1081 | ␊ |
1082 | ␉␉dp--;␊ |
1083 | ␉␉if (dp->name)␊ |
1084 | return sprintf(str, "%s(%d,%d)", dp->name, bvr->biosdev - dp->biosdev, bvr->part_no);␊ |
1085 | ␉}␊ |
1086 | ␉␊ |
1087 | ␉return 0;␊ |
1088 | }␊ |
1089 | |