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Source at commit 2354 created 10 years 5 months ago. By ifabio, sync with trunk | |
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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 | extern int multiboot_skip_partition;␊ |
82 | extern int multiboot_skip_partition_set;␊ |
83 | ␊ |
84 | struct devsw {␊ |
85 | const char * name;␊ |
86 | // size increased from char to short to handle non-BIOS internal devices␊ |
87 | unsigned short biosdev;␊ |
88 | int type;␊ |
89 | };␊ |
90 | ␊ |
91 | // Device entries must be ordered by bios device numbers. ␊ |
92 | static struct devsw devsw[] =␊ |
93 | {␊ |
94 | { "hd", 0x80, kBIOSDevTypeHardDrive }, /* DEV_HD */␊ |
95 | { "en", 0xE0, kBIOSDevTypeNetwork }, /* DEV_EN */␊ |
96 | { "rd", 0x100, kBIOSDevTypeHardDrive },␊ |
97 | { "bt", 0x101, kBIOSDevTypeHardDrive }, // turbo - type for booter partition␊ |
98 | { 0, 0 }␊ |
99 | };␊ |
100 | ␊ |
101 | // Pseudo BIOS devices␊ |
102 | enum {␊ |
103 | ␉kPseudoBIOSDevRAMDisk = 0x100,␊ |
104 | ␉kPseudoBIOSDevBooter = 0x101␊ |
105 | };␊ |
106 | ␊ |
107 | /*␊ |
108 | * Max number of file descriptors.␊ |
109 | */␊ |
110 | #define NFILES 6␊ |
111 | ␊ |
112 | static struct iob iob[NFILES];␊ |
113 | ␊ |
114 | void * gFSLoadAddress = 0;␊ |
115 | ␊ |
116 | // Turbo - save what we think is our original BIOS boot volume if we have one 0xab␊ |
117 | BVRef gBIOSBootVolume = NULL;␊ |
118 | BVRef gBootVolume;␊ |
119 | ␊ |
120 | //static BVRef getBootVolumeRef( const char * path, const char ** outPath );␊ |
121 | static BVRef newBootVolumeRef( int biosdev, int partno );␊ |
122 | ␊ |
123 | //==========================================================================␊ |
124 | // LoadVolumeFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
125 | // Load the specified file from the specified volume␊ |
126 | // to the load buffer at LOAD_ADDR.␊ |
127 | // If the file is fat, load only the i386 portion.␊ |
128 | ␊ |
129 | long LoadVolumeFile(BVRef bvr, const char *filePath)␊ |
130 | {␊ |
131 | long fileSize;␊ |
132 | ␊ |
133 | // Read file into load buffer. The data in the load buffer will be␊ |
134 | // overwritten by the next LoadFile() call.␊ |
135 | ␊ |
136 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
137 | ␊ |
138 | fileSize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
139 | ␊ |
140 | // Return the size of the file, or -1 if load failed.␊ |
141 | ␊ |
142 | return fileSize;␊ |
143 | }␊ |
144 | ␊ |
145 | //==========================================================================␊ |
146 | // LoadFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
147 | // Load the specified file to the load buffer at LOAD_ADDR.␊ |
148 | // If the file is fat, load only the i386 portion.␊ |
149 | ␊ |
150 | long LoadFile(const char * fileSpec)␊ |
151 | {␊ |
152 | const char * filePath;␊ |
153 | BVRef bvr;␊ |
154 | ␊ |
155 | // Resolve the boot volume from the file spec.␊ |
156 | ␊ |
157 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
158 | return -1;␊ |
159 | ␊ |
160 | return LoadVolumeFile(bvr, filePath);␊ |
161 | }␊ |
162 | ␊ |
163 | long ReadFileAtOffset(const char * fileSpec, void *buffer, uint64_t offset, uint64_t length)␊ |
164 | {␊ |
165 | const char *filePath;␊ |
166 | BVRef bvr;␊ |
167 | ␊ |
168 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
169 | return -1;␊ |
170 | ␊ |
171 | if (bvr->fs_readfile == NULL)␊ |
172 | return -1;␊ |
173 | ␊ |
174 | return bvr->fs_readfile(bvr, (char *)filePath, buffer, offset, length);␊ |
175 | }␊ |
176 | ␊ |
177 | long LoadThinFatFile(const char *fileSpec, void **binary)␊ |
178 | {␊ |
179 | const char *filePath;␊ |
180 | FSReadFile readFile;␊ |
181 | BVRef bvr;␊ |
182 | unsigned long length, length2;␊ |
183 | ␊ |
184 | // Resolve the boot volume from the file spec.␊ |
185 | ␊ |
186 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
187 | return -1;␊ |
188 | ␊ |
189 | *binary = (void *)kLoadAddr;␊ |
190 | ␊ |
191 | // Read file into load buffer. The data in the load buffer will be␊ |
192 | // overwritten by the next LoadFile() call.␊ |
193 | ␊ |
194 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
195 | ␊ |
196 | readFile = bvr->fs_readfile;␊ |
197 | ␊ |
198 | if (readFile != NULL) {␊ |
199 | // Read the first 4096 bytes (fat header)␊ |
200 | length = readFile(bvr, (char *)filePath, *binary, 0, 0x1000);␊ |
201 | if (length > 0) {␊ |
202 | if (ThinFatFile(binary, &length) == 0) {␊ |
203 | ␉␉␉␉if (length == 0)␊ |
204 | ␉␉␉␉␉return 0;␊ |
205 | // We found a fat binary; read only the thin part␊ |
206 | length = readFile(bvr, (char *)filePath,␊ |
207 | (void *)kLoadAddr, (unsigned long)(*binary) - kLoadAddr, length);␊ |
208 | *binary = (void *)kLoadAddr;␊ |
209 | } else {␊ |
210 | // Not a fat binary; read the rest of the file␊ |
211 | length2 = readFile(bvr, (char *)filePath, (void *)(kLoadAddr + length), length, 0);␊ |
212 | if (length2 == -1) return -1;␊ |
213 | length += length2;␊ |
214 | }␊ |
215 | }␊ |
216 | } else {␊ |
217 | length = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
218 | if (length > 0) {␊ |
219 | ThinFatFile(binary, &length);␊ |
220 | }␊ |
221 | }␊ |
222 | ␊ |
223 | return length;␊ |
224 | }␊ |
225 | ␊ |
226 | #if UNUSED␊ |
227 | long GetFSUUID(char *spec, char *uuidStr)␊ |
228 | {␊ |
229 | BVRef bvr;␊ |
230 | long rval = -1;␊ |
231 | const char *devSpec;␊ |
232 | ␊ |
233 | if ((bvr = getBootVolumeRef(spec, &devSpec)) == NULL)␊ |
234 | return -1;␊ |
235 | ␊ |
236 | if(bvr->fs_getuuid)␊ |
237 | rval = bvr->fs_getuuid(bvr, uuidStr);␊ |
238 | ␊ |
239 | return rval;␊ |
240 | }␊ |
241 | #endif␊ |
242 | ␊ |
243 | // filesystem-specific getUUID functions call this shared string generator␊ |
244 | long CreateUUIDString(uint8_t uubytes[], int nbytes, char *uuidStr)␊ |
245 | {␊ |
246 | unsigned fmtbase, fmtidx, i;␊ |
247 | uint8_t uuidfmt[] = { 4, 2, 2, 2, 6 };␊ |
248 | char *p = uuidStr;␊ |
249 | MD5_CTX md5c;␊ |
250 | uint8_t mdresult[16];␊ |
251 | ␊ |
252 | bzero(mdresult, sizeof(mdresult));␊ |
253 | ␊ |
254 | // just like AppleFileSystemDriver␊ |
255 | MD5Init(&md5c);␊ |
256 | MD5Update(&md5c, kFSUUIDNamespaceSHA1, sizeof(kFSUUIDNamespaceSHA1));␊ |
257 | MD5Update(&md5c, uubytes, nbytes);␊ |
258 | MD5Final(mdresult, &md5c);␊ |
259 | ␊ |
260 | // this UUID has been made version 3 style (i.e. via namespace)␊ |
261 | // see "-uuid-urn-" IETF draft (which otherwise copies byte for byte)␊ |
262 | mdresult[6] = 0x30 | ( mdresult[6] & 0x0F );␊ |
263 | mdresult[8] = 0x80 | ( mdresult[8] & 0x3F );␊ |
264 | ␊ |
265 | ␊ |
266 | // generate the text: e.g. 5EB1869F-C4FA-3502-BDEB-3B8ED5D87292␊ |
267 | i = 0; fmtbase = 0;␊ |
268 | for(fmtidx = 0; fmtidx < sizeof(uuidfmt); fmtidx++) {␊ |
269 | for(i=0; i < uuidfmt[fmtidx]; i++) {␊ |
270 | uint8_t byte = mdresult[fmtbase+i];␊ |
271 | char nib;␊ |
272 | ␊ |
273 | nib = byte >> 4;␊ |
274 | *p = nib + '0'; // 0x4 -> '4'␊ |
275 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
276 | p++;␊ |
277 | ␊ |
278 | nib = byte & 0xf;␊ |
279 | *p = nib + '0'; // 0x4 -> '4'␊ |
280 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
281 | p++;␊ |
282 | ␊ |
283 | }␊ |
284 | fmtbase += i;␊ |
285 | if(fmtidx < sizeof(uuidfmt)-1)␊ |
286 | *(p++) = '-';␊ |
287 | else␊ |
288 | *p = '\0';␊ |
289 | }␊ |
290 | ␊ |
291 | return 0;␊ |
292 | }␊ |
293 | ␊ |
294 | ␊ |
295 | //==========================================================================␊ |
296 | // GetDirEntry - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
297 | // Fetch the next directory entry for the given directory.␊ |
298 | ␊ |
299 | long GetDirEntry(const char * dirSpec, long long * dirIndex, const char ** name, ␊ |
300 | long * flags, long * time)␊ |
301 | {␊ |
302 | const char * dirPath;␊ |
303 | BVRef bvr;␊ |
304 | ␊ |
305 | // Resolve the boot volume from the dir spec.␊ |
306 | ␊ |
307 | if ((bvr = getBootVolumeRef(dirSpec, &dirPath)) == NULL)␊ |
308 | return -1;␊ |
309 | ␊ |
310 | // Return 0 on success, or -1 if there are no additional entries.␊ |
311 | ␊ |
312 | return bvr->fs_getdirentry( bvr,␊ |
313 | /* dirPath */ (char *)dirPath,␊ |
314 | /* dirIndex */ dirIndex,␊ |
315 | /* dirEntry */ (char **)name, flags, time, 0, 0 );␊ |
316 | }␊ |
317 | ␊ |
318 | //==========================================================================␊ |
319 | // GetFileInfo - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
320 | // Get attributes for the specified file.␊ |
321 | ␊ |
322 | static char* gMakeDirSpec;␊ |
323 | ␊ |
324 | long GetFileInfo(const char * dirSpec, const char * name,␊ |
325 | long * flags, long * time)␊ |
326 | {␊ |
327 | long long index = 0;␊ |
328 | const char * entryName;␊ |
329 | ␊ |
330 | if (gMakeDirSpec == 0)␊ |
331 | gMakeDirSpec = (char *)malloc(1024);␊ |
332 | ␊ |
333 | if (!dirSpec) {␊ |
334 | long idx, len;␊ |
335 | ␊ |
336 | len = strlen(name);␊ |
337 | ␊ |
338 | for (idx = len; idx && (name[idx] != '/' && name[idx] != '\\'); idx--) {}␊ |
339 | if (idx == 0) {␊ |
340 | if(name[idx] == '/' || name[idx] == '\\') ++name; // todo: ensure other functions handel \ properly␊ |
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->chameleonConfig));␊ |
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 (multiboot_skip_partition_set) {␊ |
848 | if (bvr->part_no == multiboot_skip_partition) continue;␊ |
849 | }␊ |
850 | ␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) foundPrimary = true;␊ |
851 | ␉␉// zhell -- Undo a regression that was introduced from r491 to 492.␊ |
852 | ␉␉// if gBIOSBootVolume is set already, no change is required␊ |
853 | ␉␉if ( bvr->flags & (kBVFlagBootable|kBVFlagSystemVolume)␊ |
854 | ␉␉␉&& gBIOSBootVolume␊ |
855 | ␉␉␉&& (!filteredChain || (filteredChain && bvr->visible))␊ |
856 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
857 | ␉␉␉bvr2 = bvr;␊ |
858 | ␉␉// zhell -- if gBIOSBootVolume is NOT set, we use the "if" statement␊ |
859 | ␉␉// from r491,␊ |
860 | ␉␉if ( bvr->flags & kBVFlagBootable␊ |
861 | ␉␉␉&& ! gBIOSBootVolume␊ |
862 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
863 | ␉␉␉bvr2 = bvr;␊ |
864 | ␉} ␊ |
865 | ␉␊ |
866 | ␉␊ |
867 | ␉/*␊ |
868 | ␉ * Use the standrad method for selecting the boot volume.␊ |
869 | ␉ */␊ |
870 | ␉if (foundPrimary)␊ |
871 | ␉{␊ |
872 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
873 | ␉␉{␊ |
874 | ␉␉␉if ( bvr->flags & kBVFlagNativeBoot && bvr->biosdev == gBIOSDev ) bvr1 = bvr;␊ |
875 | ␉␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) bvr2 = bvr;␊ |
876 | ␉␉}␊ |
877 | ␉}␊ |
878 | ␉␊ |
879 | ␉bvr = bvr2 ? bvr2 :␊ |
880 | ␉bvr1 ? bvr1 : chain;␊ |
881 | ␉␊ |
882 | ␉return bvr;␊ |
883 | }␊ |
884 | ␊ |
885 | //==========================================================================␊ |
886 | ␊ |
887 | #define LP '('␊ |
888 | #define RP ')'␊ |
889 | int gBIOSDev;␊ |
890 | ␊ |
891 | /*!␊ |
892 | This is like boot2's gBootVolume except it is for the internal use of␊ |
893 | libsaio to track which volume an unqualified path should be relative to.␊ |
894 | This replaces bootInfo->kernDev as the carrier of this information.␊ |
895 | */␊ |
896 | static BVRef gRootVolume;␊ |
897 | ␊ |
898 | void setRootVolume(BVRef volume)␊ |
899 | {␊ |
900 | gRootVolume = volume;␊ |
901 | // Veto non-native FS. Basically that means don't allow the root volume to␊ |
902 | // be set to a volume we can't read files from.␊ |
903 | if(gRootVolume != NULL && ((gRootVolume->flags & kBVFlagNativeBoot) == 0))␊ |
904 | gRootVolume = NULL;␊ |
905 | }␊ |
906 | ␊ |
907 | void setBootGlobals(BVRef chain)␊ |
908 | {␊ |
909 | // Record default boot device.␊ |
910 | gBootVolume = selectBootVolume(chain);␊ |
911 | ␊ |
912 | // turbo - Save the ORIGINAL boot volume too for loading our mkext␊ |
913 | if (!gBIOSBootVolume) gBIOSBootVolume = gBootVolume;␊ |
914 | ␊ |
915 | setRootVolume(gBootVolume);␉␊ |
916 | }␊ |
917 | ␊ |
918 | /*!␊ |
919 | Extracts the volume selector from the pathname, returns the selected␊ |
920 | BVRef, and sets *outPath to the remainder of the path.␊ |
921 | If the path did not include a volume selector then the current volume␊ |
922 | is used. When called with a volume selector the current volume␊ |
923 | is changed to the selected volume unless the volume selector is␊ |
924 | that of a ramdisk.␊ |
925 | */␊ |
926 | BVRef getBootVolumeRef( const char * path, const char ** outPath )␊ |
927 | {␊ |
928 | const char * cp;␊ |
929 | BVRef bvr = gRootVolume;␊ |
930 | int biosdev = gBIOSDev;␊ |
931 | ␊ |
932 | // Search for left parenthesis in the path specification.␊ |
933 | ␊ |
934 | for (cp = path; *cp; cp++) {␊ |
935 | if (*cp == LP || *cp == '/') break;␊ |
936 | }␊ |
937 | ␊ |
938 | if (*cp != LP) // no left paren found␊ |
939 | {␊ |
940 | // Path is using the implicit current device so if there is␊ |
941 | // no current device, then we must fail.␊ |
942 | cp = path;␊ |
943 | if ( gRootVolume == NULL )␊ |
944 | return NULL;␊ |
945 | }␊ |
946 | else if ((cp - path) == 2) // found "xx("␊ |
947 | {␊ |
948 | const struct devsw * dp;␊ |
949 | const char * xp = path;␊ |
950 | int i;␊ |
951 | int unit = -1;␊ |
952 | int part = -1;␊ |
953 | ␊ |
954 | cp++;␊ |
955 | ␊ |
956 | // Check the 2 character device name pointed by 'xp'.␊ |
957 | ␊ |
958 | for (dp = devsw; dp->name; dp++)␊ |
959 | {␊ |
960 | if ((xp[0] == dp->name[0]) && (xp[1] == dp->name[1]))␊ |
961 | break; // found matching entry␊ |
962 | }␊ |
963 | if (dp->name == NULL)␊ |
964 | {␊ |
965 | error("Unknown device '%c%c'\n", xp[0], xp[1]);␊ |
966 | return NULL;␊ |
967 | }␊ |
968 | ␊ |
969 | // Extract the optional unit number from the specification.␊ |
970 | // hd(unit) or hd(unit, part).␊ |
971 | ␊ |
972 | i = 0;␊ |
973 | while (*cp >= '0' && *cp <= '9')␊ |
974 | {␊ |
975 | i = i * 10 + *cp++ - '0';␊ |
976 | unit = i;␊ |
977 | }␊ |
978 | ␊ |
979 | // Unit is no longer optional and never really was.␊ |
980 | // If the user failed to specify it then the unit number from the previous kernDev␊ |
981 | // would have been used which makes little sense anyway.␊ |
982 | // For example, if the user did fd()/foobar and the current root device was the␊ |
983 | // second hard disk (i.e. unit 1) then fd() would select the second floppy drive!␊ |
984 | if(unit == -1)␊ |
985 | return NULL;␊ |
986 | ␊ |
987 | // Extract the optional partition number from the specification.␊ |
988 | ␊ |
989 | if (*cp == ',')␊ |
990 | part = atoi(++cp);␊ |
991 | ␊ |
992 | // If part is not specified part will be -1 whereas before it would have been␊ |
993 | // whatever the last partition was which makes about zero sense if the device␊ |
994 | // has been switched.␊ |
995 | ␊ |
996 | // Skip past the right paren.␊ |
997 | ␊ |
998 | for ( ; *cp && *cp != RP; cp++) /* LOOP */;␊ |
999 | if (*cp == RP) cp++;␊ |
1000 | ␊ |
1001 | biosdev = dp->biosdev + unit;␊ |
1002 | bvr = newBootVolumeRef(biosdev, part);␊ |
1003 | ␊ |
1004 | if(bvr == NULL)␊ |
1005 | return NULL;␊ |
1006 | }␊ |
1007 | else␊ |
1008 | {␊ |
1009 | // Bad device specifier, skip past the right paren.␊ |
1010 | ␊ |
1011 | for ( cp++; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1012 | if (*cp == RP) cp++;␊ |
1013 | // If gRootVolume was NULL, then bvr will be NULL as well which␊ |
1014 | // should be caught by the caller.␊ |
1015 | }␊ |
1016 | ␊ |
1017 | // Returns the file path following the device spec.␊ |
1018 | // e.g. 'hd(1,b)mach_kernel' is reduced to 'mach_kernel'.␊ |
1019 | ␊ |
1020 | *outPath = cp;␊ |
1021 | ␊ |
1022 | return bvr;␊ |
1023 | }␊ |
1024 | ␊ |
1025 | //==========================================================================␊ |
1026 | // Function name is a misnomer as scanBootVolumes usually calls diskScanBootVolumes␊ |
1027 | // which caches the information. So it's only allocated on the first run.␊ |
1028 | static BVRef newBootVolumeRef( int biosdev, int partno )␊ |
1029 | {␊ |
1030 | ␉BVRef bvr, bvr1, bvrChain;␊ |
1031 | ␊ |
1032 | ␉bvr = bvr1 = NULL;␊ |
1033 | ␊ |
1034 | // Try resolving "rd" and "bt" devices first.␊ |
1035 | ␉if (biosdev == kPseudoBIOSDevRAMDisk)␊ |
1036 | ␉{␊ |
1037 | ␉␉if (gRAMDiskVolume)␊ |
1038 | ␉␉ bvr1 = gRAMDiskVolume;␊ |
1039 | ␉}␊ |
1040 | ␉else if (biosdev == kPseudoBIOSDevBooter)␊ |
1041 | ␉{␊ |
1042 | ␉␉if (gRAMDiskVolume != NULL && gRAMDiskBTAliased)␊ |
1043 | ␉␉␉bvr1 = gRAMDiskVolume;␊ |
1044 | ␉␉else␊ |
1045 | ␉␉␉bvr1 = gBIOSBootVolume;␊ |
1046 | ␉}␊ |
1047 | ␉else␊ |
1048 | ␉{␊ |
1049 | ␉␉// Fetch the volume list from the device.␊ |
1050 | ␊ |
1051 | ␉␉scanBootVolumes( biosdev, NULL );␊ |
1052 | ␉␉bvrChain = getBVChainForBIOSDev(biosdev);␊ |
1053 | ␊ |
1054 | ␉␉// Look for a perfect match based on device and partition number.␊ |
1055 | ␊ |
1056 | ␉␉for ( bvr1 = NULL, bvr = bvrChain; bvr; bvr = bvr->next )␊ |
1057 | ␉␉{␊ |
1058 | ␉␉␉if ( ( bvr->flags & kBVFlagNativeBoot ) == 0 ) continue;␊ |
1059 | ␊ |
1060 | ␉␉␉bvr1 = bvr;␊ |
1061 | ␉␉␉if ( bvr->part_no == partno ) break;␊ |
1062 | ␉␉}␊ |
1063 | ␉}␊ |
1064 | ␊ |
1065 | ␉return bvr ? bvr : bvr1;␊ |
1066 | }␊ |
1067 | ␊ |
1068 | //==========================================================================␊ |
1069 | // getDeviceDescription() - Extracts unit number and partition number␊ |
1070 | // from bvr structure into "dw(u,p)" format.␊ |
1071 | // Returns length of the out string␊ |
1072 | int getDeviceDescription(BVRef bvr, char *str)␊ |
1073 | {␊ |
1074 | if(!str)␊ |
1075 | return 0;␊ |
1076 | ␊ |
1077 | ␉*str = '\0';␊ |
1078 | ␊ |
1079 | ␉if (bvr)␊ |
1080 | ␉{␊ |
1081 | const struct devsw *dp = devsw;␊ |
1082 | ␉␉while(dp->name && bvr->biosdev >= dp->biosdev)␊ |
1083 | dp++;␊ |
1084 | ␊ |
1085 | ␉␉dp--;␊ |
1086 | ␉␉if (dp->name)␊ |
1087 | return sprintf(str, "%s(%d,%d)", dp->name, bvr->biosdev - dp->biosdev, bvr->part_no);␊ |
1088 | ␉}␊ |
1089 | ␉␊ |
1090 | ␉return 0;␊ |
1091 | }␊ |
1092 |