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 "modules.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 | #if UNUSED␊ |
83 | extern int multiboot_partition;␊ |
84 | extern int multiboot_partition_set;␊ |
85 | #endif␊ |
86 | ␊ |
87 | struct devsw {␊ |
88 | const char * name;␊ |
89 | // size increased from char to short to handle non-BIOS internal devices␊ |
90 | unsigned short biosdev;␊ |
91 | int type;␊ |
92 | };␊ |
93 | ␊ |
94 | // Device entries must be ordered by bios device numbers. ␊ |
95 | static struct devsw devsw[] =␊ |
96 | {␊ |
97 | { "hd", 0x80, kBIOSDevTypeHardDrive }, /* DEV_HD */␊ |
98 | { "en", 0xE0, kBIOSDevTypeNetwork }, /* DEV_EN */␊ |
99 | { "rd", 0x100, kBIOSDevTypeHardDrive },␊ |
100 | { "bt", 0x101, kBIOSDevTypeHardDrive }, // turbo - type for booter partition␊ |
101 | { 0, 0 }␊ |
102 | };␊ |
103 | ␊ |
104 | // Pseudo BIOS devices␊ |
105 | enum {␊ |
106 | ␉kPseudoBIOSDevRAMDisk = 0x100,␊ |
107 | ␉kPseudoBIOSDevBooter = 0x101␊ |
108 | };␊ |
109 | ␊ |
110 | /*␊ |
111 | * Max number of file descriptors.␊ |
112 | */␊ |
113 | #define NFILES 6␊ |
114 | ␊ |
115 | static struct iob iob[NFILES];␊ |
116 | ␊ |
117 | void * gFSLoadAddress = 0;␊ |
118 | ␊ |
119 | // Turbo - save what we think is our original BIOS boot volume if we have one 0xab␊ |
120 | BVRef gBIOSBootVolume = NULL;␊ |
121 | BVRef gBootVolume;␊ |
122 | ␊ |
123 | //static BVRef getBootVolumeRef( const char * path, const char ** outPath );␊ |
124 | static BVRef newBootVolumeRef( int biosdev, int partno );␊ |
125 | ␊ |
126 | //==========================================================================␊ |
127 | // LoadVolumeFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
128 | // Load the specified file from the specified volume␊ |
129 | // to the load buffer at LOAD_ADDR.␊ |
130 | // If the file is fat, load only the i386 portion.␊ |
131 | ␊ |
132 | long LoadVolumeFile(BVRef bvr, const char *filePath)␊ |
133 | {␊ |
134 | long fileSize;␊ |
135 | ␊ |
136 | // Read file into load buffer. The data in the load buffer will be␊ |
137 | // overwritten by the next LoadFile() call.␊ |
138 | ␊ |
139 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
140 | ␊ |
141 | fileSize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
142 | ␊ |
143 | // Return the size of the file, or -1 if load failed.␊ |
144 | ␊ |
145 | return fileSize;␊ |
146 | }␊ |
147 | ␊ |
148 | //==========================================================================␊ |
149 | // LoadFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
150 | // Load the specified file to the load buffer at LOAD_ADDR.␊ |
151 | // If the file is fat, load only the i386 portion.␊ |
152 | ␊ |
153 | long LoadFile(const char * fileSpec)␊ |
154 | {␊ |
155 | const char * filePath;␊ |
156 | BVRef bvr;␊ |
157 | ␊ |
158 | // Resolve the boot volume from the file spec.␊ |
159 | ␊ |
160 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
161 | return -1;␊ |
162 | ␊ |
163 | return LoadVolumeFile(bvr, filePath);␊ |
164 | }␊ |
165 | ␊ |
166 | long ReadFileAtOffset(const char * fileSpec, void *buffer, uint64_t offset, uint64_t length)␊ |
167 | {␊ |
168 | const char *filePath;␊ |
169 | BVRef bvr;␊ |
170 | ␊ |
171 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
172 | return -1;␊ |
173 | ␊ |
174 | if (bvr->fs_readfile == NULL)␊ |
175 | return -1;␊ |
176 | ␊ |
177 | return bvr->fs_readfile(bvr, (char *)filePath, buffer, offset, length);␊ |
178 | }␊ |
179 | ␊ |
180 | long LoadThinFatFile(const char *fileSpec, void **binary)␊ |
181 | {␊ |
182 | const char *filePath;␊ |
183 | FSReadFile readFile;␊ |
184 | BVRef bvr;␊ |
185 | unsigned long length, length2;␊ |
186 | ␊ |
187 | // Resolve the boot volume from the file spec.␊ |
188 | ␊ |
189 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
190 | return -1;␊ |
191 | ␊ |
192 | *binary = (void *)kLoadAddr;␊ |
193 | ␊ |
194 | // Read file into load buffer. The data in the load buffer will be␊ |
195 | // overwritten by the next LoadFile() call.␊ |
196 | ␊ |
197 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
198 | ␊ |
199 | readFile = bvr->fs_readfile;␊ |
200 | ␊ |
201 | if (readFile != NULL) {␊ |
202 | // Read the first 4096 bytes (fat header)␊ |
203 | length = readFile(bvr, (char *)filePath, *binary, 0, 0x1000);␊ |
204 | if (length > 0) {␊ |
205 | if (ThinFatFile(binary, &length) == 0) {␊ |
206 | ␉␉␉␉if (length == 0)␊ |
207 | ␉␉␉␉␉return 0;␊ |
208 | // We found a fat binary; read only the thin part␊ |
209 | length = readFile(bvr, (char *)filePath,␊ |
210 | (void *)kLoadAddr, (unsigned long)(*binary) - kLoadAddr, length);␊ |
211 | *binary = (void *)kLoadAddr;␊ |
212 | } else {␊ |
213 | // Not a fat binary; read the rest of the file␊ |
214 | length2 = readFile(bvr, (char *)filePath, (void *)(kLoadAddr + length), length, 0);␊ |
215 | if (length2 == -1) return -1;␊ |
216 | length += length2;␊ |
217 | }␊ |
218 | }␊ |
219 | } else {␊ |
220 | length = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
221 | if (length > 0) {␊ |
222 | ThinFatFile(binary, &length);␊ |
223 | }␊ |
224 | }␊ |
225 | ␊ |
226 | return length;␊ |
227 | }␊ |
228 | ␊ |
229 | // filesystem-specific getUUID functions call this shared string generator␊ |
230 | long CreateUUIDString(uint8_t uubytes[], int nbytes, char *uuidStr)␊ |
231 | {␊ |
232 | unsigned fmtbase, fmtidx, i;␊ |
233 | uint8_t uuidfmt[] = { 4, 2, 2, 2, 6 };␊ |
234 | char *p = uuidStr;␊ |
235 | MD5_CTX md5c;␊ |
236 | uint8_t mdresult[16];␊ |
237 | ␊ |
238 | bzero(mdresult, sizeof(mdresult));␊ |
239 | ␊ |
240 | // just like AppleFileSystemDriver␊ |
241 | MD5Init(&md5c);␊ |
242 | MD5Update(&md5c, kFSUUIDNamespaceSHA1, sizeof(kFSUUIDNamespaceSHA1));␊ |
243 | MD5Update(&md5c, uubytes, nbytes);␊ |
244 | MD5Final(mdresult, &md5c);␊ |
245 | ␊ |
246 | // this UUID has been made version 3 style (i.e. via namespace)␊ |
247 | // see "-uuid-urn-" IETF draft (which otherwise copies byte for byte)␊ |
248 | mdresult[6] = 0x30 | ( mdresult[6] & 0x0F );␊ |
249 | mdresult[8] = 0x80 | ( mdresult[8] & 0x3F );␊ |
250 | ␊ |
251 | ␊ |
252 | // generate the text: e.g. 5EB1869F-C4FA-3502-BDEB-3B8ED5D87292␊ |
253 | i = 0; fmtbase = 0;␊ |
254 | for(fmtidx = 0; fmtidx < sizeof(uuidfmt); fmtidx++) {␊ |
255 | for(i=0; i < uuidfmt[fmtidx]; i++) {␊ |
256 | uint8_t byte = mdresult[fmtbase+i];␊ |
257 | char nib;␊ |
258 | ␊ |
259 | nib = byte >> 4;␊ |
260 | *p = nib + '0'; // 0x4 -> '4'␊ |
261 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
262 | p++;␊ |
263 | ␊ |
264 | nib = byte & 0xf;␊ |
265 | *p = nib + '0'; // 0x4 -> '4'␊ |
266 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
267 | p++;␊ |
268 | ␊ |
269 | }␊ |
270 | fmtbase += i;␊ |
271 | if(fmtidx < sizeof(uuidfmt)-1)␊ |
272 | *(p++) = '-';␊ |
273 | else␊ |
274 | *p = '\0';␊ |
275 | }␊ |
276 | ␊ |
277 | return 0;␊ |
278 | }␊ |
279 | ␊ |
280 | ␊ |
281 | //==========================================================================␊ |
282 | // GetDirEntry - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
283 | // Fetch the next directory entry for the given directory.␊ |
284 | ␊ |
285 | long GetDirEntry(const char * dirSpec, long long * dirIndex, const char ** name, ␊ |
286 | long * flags, long * time)␊ |
287 | {␊ |
288 | const char * dirPath;␊ |
289 | BVRef bvr;␊ |
290 | ␊ |
291 | // Resolve the boot volume from the dir spec.␊ |
292 | ␊ |
293 | if ((bvr = getBootVolumeRef(dirSpec, &dirPath)) == NULL)␊ |
294 | return -1;␊ |
295 | ␊ |
296 | // Return 0 on success, or -1 if there are no additional entries.␊ |
297 | ␊ |
298 | return bvr->fs_getdirentry( bvr,␊ |
299 | /* dirPath */ (char *)dirPath,␊ |
300 | /* dirIndex */ dirIndex,␊ |
301 | /* dirEntry */ (char **)name, flags, time, 0, 0 );␊ |
302 | }␊ |
303 | ␊ |
304 | //==========================================================================␊ |
305 | // GetFileInfo - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
306 | // Get attributes for the specified file.␊ |
307 | ␊ |
308 | static char* gMakeDirSpec;␊ |
309 | ␊ |
310 | long GetFileInfo(const char * dirSpec, const char * name,␊ |
311 | long * flags, long * time)␊ |
312 | {␊ |
313 | long long index = 0;␊ |
314 | const char * entryName;␊ |
315 | ␊ |
316 | if (gMakeDirSpec == 0)␊ |
317 | gMakeDirSpec = (char *)malloc(1024);␊ |
318 | ␊ |
319 | if (!dirSpec) {␊ |
320 | long idx, len;␊ |
321 | ␊ |
322 | len = strlen(name);␊ |
323 | ␊ |
324 | for (idx = len; idx && (name[idx] != '/' && name[idx] != '\\'); idx--) {}␊ |
325 | if (idx == 0) {␊ |
326 | gMakeDirSpec[0] = '/';␊ |
327 | gMakeDirSpec[1] = '\0';␊ |
328 | } else {␊ |
329 | idx++;␊ |
330 | strncpy(gMakeDirSpec, name, idx);␊ |
331 | name += idx;␊ |
332 | }␊ |
333 | dirSpec = gMakeDirSpec;␊ |
334 | }␊ |
335 | ␊ |
336 | while (GetDirEntry(dirSpec, &index, &entryName, flags, time) == 0)␊ |
337 | {␊ |
338 | if (strcmp(entryName, name) == 0)␊ |
339 | return 0; // success␊ |
340 | }␊ |
341 | return -1; // file not found␊ |
342 | }␊ |
343 | ␊ |
344 | //==========================================================================␊ |
345 | // GetFreeFD()␊ |
346 | ␊ |
347 | static int GetFreeFd(void)␊ |
348 | {␊ |
349 | ␉int␉fd;␊ |
350 | ␊ |
351 | ␉// Locate a free descriptor slot.␊ |
352 | ␉for (fd = 0; fd < NFILES; fd++) {␊ |
353 | ␉␉if (iob[fd].i_flgs == 0) {␊ |
354 | ␉␉␉return fd;␊ |
355 | ␉ ␉}␊ |
356 | ␉}␊ |
357 | ␉stop("Out of file descriptors");␊ |
358 | ␉// not reached␊ |
359 | ␉return -1;␊ |
360 | }␊ |
361 | ␊ |
362 | //==========================================================================␊ |
363 | // iob_from_fdesc()␊ |
364 | //␊ |
365 | // Return a pointer to an allocated 'iob' based on the file descriptor␊ |
366 | // provided. Returns NULL if the file descriptor given is invalid.␊ |
367 | ␊ |
368 | static struct iob * iob_from_fdesc(int fdesc)␊ |
369 | {␊ |
370 | register struct iob * io;␊ |
371 | ␊ |
372 | if (fdesc < 0 || fdesc >= NFILES ||␊ |
373 | ((io = &iob[fdesc])->i_flgs & F_ALLOC) == 0)␊ |
374 | return NULL;␊ |
375 | else␊ |
376 | return io;␊ |
377 | }␊ |
378 | ␊ |
379 | //==========================================================================␊ |
380 | // open() - Open the file specified by 'path' for reading.␊ |
381 | ␊ |
382 | static int open_bvr(BVRef bvr, const char *filePath, int flags)␊ |
383 | {␊ |
384 | ␉struct iob␉*io;␊ |
385 | ␉int␉␉fdesc;␊ |
386 | ␉int␉␉i;␊ |
387 | ␊ |
388 | ␉if (bvr == NULL) {␊ |
389 | ␉␉return -1;␊ |
390 | ␉}␊ |
391 | ␊ |
392 | ␉fdesc = GetFreeFd();␊ |
393 | ␉io = &iob[fdesc];␊ |
394 | ␉bzero(io, sizeof(*io));␊ |
395 | ␊ |
396 | ␉// Mark the descriptor as taken.␊ |
397 | ␉io->i_flgs = F_ALLOC;␊ |
398 | ␊ |
399 | ␉// Find the next available memory block in the download buffer.␊ |
400 | ␉io->i_buf = (char *) LOAD_ADDR;␊ |
401 | ␉for (i = 0; i < NFILES; i++) {␊ |
402 | ␉␉if ((iob[i].i_flgs != F_ALLOC) || (i == fdesc)) {␊ |
403 | ␉␉␉continue;␊ |
404 | ␉␉}␊ |
405 | ␉␉io->i_buf = max(iob[i].i_filesize + iob[i].i_buf, io->i_buf);␊ |
406 | ␉}␊ |
407 | ␊ |
408 | ␉// Load entire file into memory. Unnecessary open() calls must be avoided.␊ |
409 | ␉gFSLoadAddress = io->i_buf;␊ |
410 | ␉io->i_filesize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
411 | ␉if (io->i_filesize < 0) {␊ |
412 | ␉␉close(fdesc);␊ |
413 | ␉␉return -1;␊ |
414 | ␉}␊ |
415 | ␉return fdesc;␊ |
416 | }␊ |
417 | ␊ |
418 | int open(const char *path, int flags)␊ |
419 | {␊ |
420 | ␉const char␉*filepath;␊ |
421 | ␉BVRef␉␉bvr;␊ |
422 | ␊ |
423 | ␉// Resolve the boot volume from the file spec.␊ |
424 | ␉if ((bvr = getBootVolumeRef(path, &filepath)) != NULL) {␊ |
425 | ␉␉return open_bvr(bvr, filepath, flags);␊ |
426 | ␉}␊ |
427 | ␉return -1;␊ |
428 | }␊ |
429 | ␊ |
430 | int open_bvdev(const char *bvd, const char *path, int flags)␊ |
431 | {␊ |
432 | const struct devsw␉*dp;␊ |
433 | ␉const char␉␉*cp;␊ |
434 | ␉BVRef␉␉␉bvr;␊ |
435 | ␉int␉␉␉i;␊ |
436 | ␉int␉␉␉len;␊ |
437 | ␉int␉␉␉unit;␊ |
438 | ␉int␉␉␉partition;␊ |
439 | ␊ |
440 | ␉if ((i = open(path, flags)) >= 0) {␊ |
441 | ␉␉return i;␊ |
442 | ␉}␊ |
443 | ␊ |
444 | ␉if (bvd == NULL || (len = strlen(bvd)) < 2) {␊ |
445 | ␉␉return -1;␊ |
446 | ␉}␊ |
447 | ␊ |
448 | ␉for (dp=devsw; dp->name; dp++) {␊ |
449 | ␉␉if (bvd[0] == dp->name[0] && bvd[1] == dp->name[1]) {␊ |
450 | ␉␉␉unit = 0;␊ |
451 | ␉␉␉partition = 0;␊ |
452 | ␉␉␉/* get optional unit and partition */␊ |
453 | ␉␉␉if (len >= 5 && bvd[2] == '(') { /* min must be present xx(0) */␊ |
454 | ␉␉␉␉cp = &bvd[3];␊ |
455 | ␉␉␉␉i = 0;␊ |
456 | ␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
457 | ␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
458 | ␉␉␉␉␉unit = i;␊ |
459 | ␉␉␉␉}␊ |
460 | ␉␉␉␉if (*cp++ == ',') {␊ |
461 | ␉␉␉␉␉i = 0;␊ |
462 | ␉␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
463 | ␉␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
464 | ␉␉␉␉␉␉partition = i;␊ |
465 | ␉␉␉␉␉}␊ |
466 | ␉␉␉␉}␊ |
467 | ␉␉␉}␊ |
468 | ␉␉␉bvr = newBootVolumeRef(dp->biosdev + unit, partition);␊ |
469 | ␉␉␉return open_bvr(bvr, path, flags);␊ |
470 | ␉␉}␊ |
471 | }␊ |
472 | ␉return -1;␊ |
473 | }␊ |
474 | ␊ |
475 | //==========================================================================␊ |
476 | // close() - Close a file descriptor.␊ |
477 | ␊ |
478 | int close(int fdesc)␊ |
479 | {␊ |
480 | struct iob * io;␊ |
481 | ␊ |
482 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
483 | return (-1);␊ |
484 | ␊ |
485 | io->i_flgs = 0;␊ |
486 | ␊ |
487 | return 0;␊ |
488 | }␊ |
489 | ␊ |
490 | //==========================================================================␊ |
491 | // read() - Read up to 'count' bytes of data from the file descriptor␊ |
492 | // into the buffer pointed to by buf.␊ |
493 | ␊ |
494 | int read(int fdesc, char * buf, int count)␊ |
495 | {␊ |
496 | struct iob * io;␊ |
497 | ␊ |
498 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
499 | return (-1);␊ |
500 | ␊ |
501 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
502 | count = io->i_filesize - io->i_offset;␊ |
503 | ␊ |
504 | if (count <= 0)␊ |
505 | return 0; // end of file␊ |
506 | ␊ |
507 | bcopy(io->i_buf + io->i_offset, buf, count);␊ |
508 | ␊ |
509 | io->i_offset += count;␊ |
510 | ␊ |
511 | return count;␊ |
512 | }␊ |
513 | ␊ |
514 | //==========================================================================␊ |
515 | // file_size() - Returns the size of the file described by the file␊ |
516 | // descriptor.␊ |
517 | ␊ |
518 | int file_size(int fdesc)␊ |
519 | {␊ |
520 | struct iob * io;␊ |
521 | ␊ |
522 | if ((io = iob_from_fdesc(fdesc)) == 0)␊ |
523 | return 0;␊ |
524 | ␊ |
525 | return io->i_filesize;␊ |
526 | }␊ |
527 | ␊ |
528 | //==========================================================================␊ |
529 | ␊ |
530 | struct dirstuff * opendir(const char * path)␊ |
531 | {␊ |
532 | struct dirstuff * dirp = 0;␊ |
533 | const char * dirPath;␊ |
534 | BVRef bvr;␊ |
535 | ␊ |
536 | if ((bvr = getBootVolumeRef(path, &dirPath)) == NULL)␊ |
537 | goto error;␊ |
538 | ␊ |
539 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
540 | if (dirp == NULL)␊ |
541 | goto error;␊ |
542 | ␊ |
543 | dirp->dir_path = newString(dirPath);␊ |
544 | if (dirp->dir_path == NULL)␊ |
545 | goto error;␊ |
546 | ␊ |
547 | dirp->dir_bvr = bvr;␊ |
548 | ␊ |
549 | return dirp;␊ |
550 | ␊ |
551 | error:␊ |
552 | closedir(dirp);␊ |
553 | return NULL;␊ |
554 | }␊ |
555 | ␊ |
556 | //==========================================================================␊ |
557 | ␊ |
558 | int closedir(struct dirstuff * dirp)␊ |
559 | {␊ |
560 | if (dirp) {␊ |
561 | if (dirp->dir_path) free(dirp->dir_path);␊ |
562 | free(dirp);␊ |
563 | }␊ |
564 | return 0;␊ |
565 | }␊ |
566 | ␊ |
567 | //==========================================================================␊ |
568 | ␊ |
569 | int readdir(struct dirstuff * dirp, const char ** name, long * flags,␊ |
570 | long * time)␊ |
571 | {␊ |
572 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
573 | /* dirPath */ dirp->dir_path,␊ |
574 | /* dirIndex */ &dirp->dir_index,␊ |
575 | /* dirEntry */ (char **)name, flags, time,␊ |
576 | 0, 0);␊ |
577 | }␊ |
578 | ␊ |
579 | #if UNUSED␊ |
580 | long GetFSUUID(char *spec, char *uuidStr)␊ |
581 | {␊ |
582 | BVRef bvr;␊ |
583 | long rval = -1;␊ |
584 | const char *devSpec;␊ |
585 | ␉␊ |
586 | if ((bvr = getBootVolumeRef(spec, &devSpec)) == NULL)␊ |
587 | return -1;␊ |
588 | ␉␊ |
589 | if(bvr->fs_getuuid)␊ |
590 | rval = bvr->fs_getuuid(bvr, uuidStr);␊ |
591 | ␉␊ |
592 | return rval;␊ |
593 | }␊ |
594 | ␊ |
595 | long GetFileBlock(const char *fileSpec, unsigned long long *firstBlock)␊ |
596 | {␊ |
597 | const char * filePath;␊ |
598 | BVRef bvr;␊ |
599 | ␉␊ |
600 | // Resolve the boot volume from the file spec.␊ |
601 | ␉␊ |
602 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL) {␊ |
603 | printf("Boot volume for '%s' is bogus\n", fileSpec);␊ |
604 | return -1;␊ |
605 | }␊ |
606 | ␉␊ |
607 | return bvr->fs_getfileblock(bvr, (char *)filePath, firstBlock);␊ |
608 | }␊ |
609 | ␊ |
610 | //==========================================================================␊ |
611 | // openmem()␊ |
612 | ␊ |
613 | int openmem(char * buf, int len)␊ |
614 | {␊ |
615 | int fdesc;␊ |
616 | struct iob * io;␊ |
617 | ␉␊ |
618 | fdesc = GetFreeFd();␊ |
619 | io = &iob[fdesc];␊ |
620 | bzero(io, sizeof(*io));␊ |
621 | ␉␊ |
622 | // Mark the descriptor as taken. Set the F_MEM flag to indicate␊ |
623 | // that the file buffer is provided by the caller.␊ |
624 | ␉␊ |
625 | io->i_flgs = F_ALLOC | F_MEM;␊ |
626 | io->i_buf = buf;␊ |
627 | io->i_filesize = len;␊ |
628 | ␉␊ |
629 | return fdesc;␊ |
630 | }␊ |
631 | ␊ |
632 | //==========================================================================␊ |
633 | // lseek() - Reposition the byte offset of the file descriptor from the␊ |
634 | // beginning of the file. Returns the relocated offset.␊ |
635 | ␊ |
636 | int b_lseek(int fdesc, int offset, int ptr)␊ |
637 | {␊ |
638 | struct iob * io;␊ |
639 | ␉␊ |
640 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
641 | return (-1);␊ |
642 | ␉␊ |
643 | io->i_offset = offset;␊ |
644 | ␉␊ |
645 | return offset;␊ |
646 | }␊ |
647 | ␊ |
648 | //==========================================================================␊ |
649 | // tell() - Returns the byte offset of the file descriptor.␊ |
650 | ␊ |
651 | int tell(int fdesc)␊ |
652 | {␊ |
653 | struct iob * io;␊ |
654 | ␉␊ |
655 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
656 | return 0;␊ |
657 | ␉␊ |
658 | return io->i_offset;␊ |
659 | }␊ |
660 | ␊ |
661 | //==========================================================================␊ |
662 | // write() - Write up to 'count' bytes of data to the file descriptor␊ |
663 | // from the buffer pointed to by buf.␊ |
664 | ␊ |
665 | int write(int fdesc, const char * buf, int count)␊ |
666 | {␊ |
667 | struct iob * io;␊ |
668 | ␊ |
669 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
670 | return (-1);␊ |
671 | ␉␊ |
672 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
673 | count = io->i_filesize - io->i_offset;␊ |
674 | ␉␊ |
675 | if (count <= 0)␊ |
676 | return 0; // end of file␊ |
677 | ␉␊ |
678 | bcopy(buf, io->i_buf + io->i_offset, count);␊ |
679 | ␉␊ |
680 | io->i_offset += count;␊ |
681 | ␉␊ |
682 | return count;␊ |
683 | }␊ |
684 | ␊ |
685 | int writebyte(int fdesc, char value)␊ |
686 | {␊ |
687 | struct iob * io;␊ |
688 | ␊ |
689 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
690 | return (-1);␊ |
691 | ␉␊ |
692 | if ((io->i_offset + 1) > (unsigned int)io->i_filesize)␊ |
693 | return 0; // end of file␊ |
694 | ␉␊ |
695 | io->i_buf[io->i_offset++] = value;␊ |
696 | ␉␊ |
697 | return 1;␊ |
698 | }␊ |
699 | ␊ |
700 | int writeint(int fdesc, int value)␊ |
701 | {␊ |
702 | struct iob * io;␊ |
703 | ␊ |
704 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
705 | return (-1);␊ |
706 | ␉␊ |
707 | if ((io->i_offset + 4) > (unsigned int)io->i_filesize)␊ |
708 | return 0; // end of file␊ |
709 | ␉␊ |
710 | bcopy(&value, io->i_buf + io->i_offset, 4);␊ |
711 | ␉␊ |
712 | io->i_offset += 4;␊ |
713 | ␉␊ |
714 | return 4;␊ |
715 | }␊ |
716 | //==========================================================================␊ |
717 | ␊ |
718 | struct dirstuff * vol_opendir(BVRef bvr, const char * path)␊ |
719 | {␊ |
720 | struct dirstuff * dirp = 0;␊ |
721 | ␉␊ |
722 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
723 | if (dirp == NULL)␊ |
724 | goto error;␊ |
725 | ␉␊ |
726 | dirp->dir_path = newString(path);␊ |
727 | if (dirp->dir_path == NULL)␊ |
728 | goto error;␊ |
729 | ␉␊ |
730 | dirp->dir_bvr = bvr;␊ |
731 | ␉␊ |
732 | return dirp;␊ |
733 | ␉␊ |
734 | error:␊ |
735 | closedir(dirp);␊ |
736 | return NULL;␊ |
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 | const char * systemConfigDir()␊ |
754 | {␊ |
755 | if (gBootFileType == kNetworkDeviceType)␊ |
756 | ␉return "";␊ |
757 | return "/Library/Preferences/SystemConfiguration";␊ |
758 | }␊ |
759 | ␊ |
760 | #endif␊ |
761 | ␊ |
762 | //==========================================================================␊ |
763 | ␊ |
764 | int gBootFileType;␊ |
765 | ␊ |
766 | void scanBootVolumes( int biosdev, int * count )␊ |
767 | {␊ |
768 | BVRef bvr = 0;␊ |
769 | ␊ |
770 | bvr = diskScanBootVolumes(biosdev, count);␊ |
771 | if (bvr == NULL)␊ |
772 | {␊ |
773 | #ifdef NBP_SUPPORT␊ |
774 | bvr = nbpScanBootVolumes(biosdev, count);␊ |
775 | if (bvr != NULL)␊ |
776 | {␊ |
777 | gBootFileType = kNetworkDeviceType;␊ |
778 | }␊ |
779 | #endif␊ |
780 | }␊ |
781 | else␊ |
782 | {␊ |
783 | gBootFileType = kBlockDeviceType;␊ |
784 | }␊ |
785 | }␊ |
786 | ␊ |
787 | //==========================================================================␊ |
788 | ␊ |
789 | void scanDisks(int biosdev, int *count)␊ |
790 | {␊ |
791 | #define MAX_HDD_COUNT 32␊ |
792 | int bvCount;␊ |
793 | int hd = 0;␊ |
794 | ␊ |
795 | // Testing up to MAX_HDD_COUNT hard drives.␊ |
796 | ␉while(!testBiosread(0x80 + hd, 0) && hd < MAX_HDD_COUNT)␊ |
797 | ␉{␊ |
798 | ␉ bvCount = 0;␊ |
799 | ␉ scanBootVolumes(0x80 + hd, &bvCount);␊ |
800 | hd++;␊ |
801 | ␉}␊ |
802 | ␊ |
803 | // Also scanning CD/DVD drive.␊ |
804 | ␉if (biosDevIsCDROM(gBIOSDev))␊ |
805 | ␉{␊ |
806 | ␉ bvCount = 0;␊ |
807 | ␉scanBootVolumes(gBIOSDev, &bvCount);␊ |
808 | ␉}␊ |
809 | }␊ |
810 | ␊ |
811 | //==========================================================================␊ |
812 | ␊ |
813 | BVRef selectBootVolume( BVRef chain )␊ |
814 | {␊ |
815 | ␉bool filteredChain = false;␊ |
816 | ␉bool foundPrimary = false;␊ |
817 | ␉BVRef bvr, bvr1 = 0, bvr2 = 0;␊ |
818 | ␉␊ |
819 | ␉if (chain->filtered) filteredChain = true;␊ |
820 | ␉␊ |
821 | #if UNUSED␊ |
822 | ␉if (multiboot_partition_set)␊ |
823 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
824 | ␉␉␉if ( bvr->part_no == multiboot_partition && bvr->biosdev == gBIOSDev ) ␊ |
825 | ␉␉␉␉return bvr;␊ |
826 | #endif␊ |
827 | ␉/*␊ |
828 | ␉ * Checking "Default Partition" key in system configuration - use format: hd(x,y), the volume UUID or label -␊ |
829 | ␉ * to override the default selection.␊ |
830 | ␉ * We accept only kBVFlagSystemVolume or kBVFlagForeignBoot volumes.␊ |
831 | ␉ */␊ |
832 | ␉char *val = XMLDecode(getStringForKey(kDefaultPartition, &bootInfo->bootConfig));␊ |
833 | if (val) {␊ |
834 | for ( bvr = chain; bvr; bvr = bvr->next ) {␊ |
835 | if (matchVolumeToString(bvr, val, false)) {␊ |
836 | free(val);␊ |
837 | return bvr;␊ |
838 | }␊ |
839 | }␊ |
840 | free(val);␊ |
841 | }␉␊ |
842 | ␉␊ |
843 | ␉/*␊ |
844 | ␉ * Scannig the volume chain backwards and trying to find ␊ |
845 | ␉ * a HFS+ volume with valid boot record signature.␊ |
846 | ␉ * If not found any active partition then we will␊ |
847 | ␉ * select this volume as the boot volume.␊ |
848 | ␉ */␊ |
849 | ␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
850 | ␉{␊ |
851 | ␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) foundPrimary = true;␊ |
852 | ␉␉// zhell -- Undo a regression that was introduced from r491 to 492.␊ |
853 | ␉␉// if gBIOSBootVolume is set already, no change is required␊ |
854 | ␉␉if ( bvr->flags & (kBVFlagBootable|kBVFlagSystemVolume)␊ |
855 | ␉␉␉&& gBIOSBootVolume␊ |
856 | ␉␉␉&& (!filteredChain || (filteredChain && bvr->visible))␊ |
857 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
858 | ␉␉␉bvr2 = bvr;␊ |
859 | ␉␉// zhell -- if gBIOSBootVolume is NOT set, we use the "if" statement␊ |
860 | ␉␉// from r491,␊ |
861 | ␉␉if ( bvr->flags & kBVFlagBootable␊ |
862 | ␉␉␉&& ! gBIOSBootVolume␊ |
863 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
864 | ␉␉␉bvr2 = bvr;␊ |
865 | ␉} ␊ |
866 | ␉␊ |
867 | ␉␊ |
868 | ␉/*␊ |
869 | ␉ * Use the standrad method for selecting the boot volume.␊ |
870 | ␉ */␊ |
871 | ␉if (foundPrimary)␊ |
872 | ␉{␊ |
873 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
874 | ␉␉{␊ |
875 | ␉␉␉if ( bvr->flags & kBVFlagNativeBoot && bvr->biosdev == gBIOSDev ) bvr1 = bvr;␊ |
876 | ␉␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) bvr2 = bvr;␊ |
877 | ␉␉}␊ |
878 | ␉}␊ |
879 | ␉␊ |
880 | ␉bvr = bvr2 ? bvr2 :␊ |
881 | ␉bvr1 ? bvr1 : chain;␊ |
882 | ␉␊ |
883 | ␉return bvr;␊ |
884 | }␊ |
885 | ␊ |
886 | //==========================================================================␊ |
887 | ␊ |
888 | #define LP '('␊ |
889 | #define RP ')'␊ |
890 | int gBIOSDev;␊ |
891 | ␊ |
892 | /*!␊ |
893 | This is like boot2's gBootVolume except it is for the internal use of␊ |
894 | libsaio to track which volume an unqualified path should be relative to.␊ |
895 | This replaces bootInfo->kernDev as the carrier of this information.␊ |
896 | */␊ |
897 | static BVRef gRootVolume;␊ |
898 | ␊ |
899 | void setRootVolume(BVRef volume)␊ |
900 | {␊ |
901 | gRootVolume = volume;␊ |
902 | // Veto non-native FS. Basically that means don't allow the root volume to␊ |
903 | // be set to a volume we can't read files from.␊ |
904 | if(gRootVolume != NULL && ((gRootVolume->flags & kBVFlagNativeBoot) == 0))␊ |
905 | gRootVolume = NULL;␊ |
906 | }␊ |
907 | ␊ |
908 | void setBootGlobals(BVRef chain)␊ |
909 | {␊ |
910 | // Record default boot device.␊ |
911 | gBootVolume = selectBootVolume(chain);␊ |
912 | ␊ |
913 | // turbo - Save the ORIGINAL boot volume too for loading our mkext␊ |
914 | if (!gBIOSBootVolume) gBIOSBootVolume = gBootVolume;␊ |
915 | ␊ |
916 | setRootVolume(gBootVolume);␉␊ |
917 | }␊ |
918 | ␊ |
919 | /*!␊ |
920 | Extracts the volume selector from the pathname, returns the selected␊ |
921 | BVRef, and sets *outPath to the remainder of the path.␊ |
922 | If the path did not include a volume selector then the current volume␊ |
923 | is used. When called with a volume selector the current volume␊ |
924 | is changed to the selected volume unless the volume selector is␊ |
925 | that of a ramdisk.␊ |
926 | */␊ |
927 | BVRef getBootVolumeRef( const char * path, const char ** outPath )␊ |
928 | {␊ |
929 | const char * cp;␊ |
930 | BVRef bvr = gRootVolume;␊ |
931 | int biosdev = gBIOSDev;␊ |
932 | ␊ |
933 | // Search for left parenthesis in the path specification.␊ |
934 | ␊ |
935 | for (cp = path; *cp; cp++) {␊ |
936 | if (*cp == LP || *cp == '/') break;␊ |
937 | }␊ |
938 | ␊ |
939 | if (*cp != LP) // no left paren found␊ |
940 | {␊ |
941 | // Path is using the implicit current device so if there is␊ |
942 | // no current device, then we must fail.␊ |
943 | cp = path;␊ |
944 | if ( gRootVolume == NULL )␊ |
945 | return NULL;␊ |
946 | }␊ |
947 | else if ((cp - path) == 2) // found "xx("␊ |
948 | {␊ |
949 | const struct devsw * dp;␊ |
950 | const char * xp = path;␊ |
951 | int i;␊ |
952 | int unit = -1;␊ |
953 | int part = -1;␊ |
954 | ␊ |
955 | cp++;␊ |
956 | ␊ |
957 | // Check the 2 character device name pointed by 'xp'.␊ |
958 | ␊ |
959 | for (dp = devsw; dp->name; dp++)␊ |
960 | {␊ |
961 | if ((xp[0] == dp->name[0]) && (xp[1] == dp->name[1]))␊ |
962 | break; // found matching entry␊ |
963 | }␊ |
964 | if (dp->name == NULL)␊ |
965 | {␊ |
966 | error("Unknown device '%c%c'\n", xp[0], xp[1]);␊ |
967 | return NULL;␊ |
968 | }␊ |
969 | ␊ |
970 | // Extract the optional unit number from the specification.␊ |
971 | // hd(unit) or hd(unit, part).␊ |
972 | ␊ |
973 | i = 0;␊ |
974 | while (*cp >= '0' && *cp <= '9')␊ |
975 | {␊ |
976 | i = i * 10 + *cp++ - '0';␊ |
977 | unit = i;␊ |
978 | }␊ |
979 | ␊ |
980 | // Unit is no longer optional and never really was.␊ |
981 | // If the user failed to specify it then the unit number from the previous kernDev␊ |
982 | // would have been used which makes little sense anyway.␊ |
983 | // For example, if the user did fd()/foobar and the current root device was the␊ |
984 | // second hard disk (i.e. unit 1) then fd() would select the second floppy drive!␊ |
985 | if(unit == -1)␊ |
986 | return NULL;␊ |
987 | ␊ |
988 | // Extract the optional partition number from the specification.␊ |
989 | ␊ |
990 | if (*cp == ',')␊ |
991 | part = atoi(++cp);␊ |
992 | ␊ |
993 | // If part is not specified part will be -1 whereas before it would have been␊ |
994 | // whatever the last partition was which makes about zero sense if the device␊ |
995 | // has been switched.␊ |
996 | ␊ |
997 | // Skip past the right paren.␊ |
998 | ␊ |
999 | for ( ; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1000 | if (*cp == RP) cp++;␊ |
1001 | ␊ |
1002 | biosdev = dp->biosdev + unit;␊ |
1003 | bvr = newBootVolumeRef(biosdev, part);␊ |
1004 | ␊ |
1005 | if(bvr == NULL)␊ |
1006 | return NULL;␊ |
1007 | }␊ |
1008 | else␊ |
1009 | {␊ |
1010 | // Bad device specifier, skip past the right paren.␊ |
1011 | ␊ |
1012 | for ( cp++; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1013 | if (*cp == RP) cp++;␊ |
1014 | // If gRootVolume was NULL, then bvr will be NULL as well which␊ |
1015 | // should be caught by the caller.␊ |
1016 | }␊ |
1017 | ␊ |
1018 | // Returns the file path following the device spec.␊ |
1019 | // e.g. 'hd(1,b)mach_kernel' is reduced to 'mach_kernel'.␊ |
1020 | ␊ |
1021 | *outPath = cp;␊ |
1022 | ␊ |
1023 | return bvr;␊ |
1024 | }␊ |
1025 | ␊ |
1026 | //==========================================================================␊ |
1027 | // Function name is a misnomer as scanBootVolumes usually calls diskScanBootVolumes␊ |
1028 | // which caches the information. So it's only allocated on the first run.␊ |
1029 | static BVRef newBootVolumeRef( int biosdev, int partno )␊ |
1030 | {␊ |
1031 | ␉BVRef bvr, bvr1, bvrChain;␊ |
1032 | ␊ |
1033 | ␉bvr = bvr1 = NULL;␊ |
1034 | ␊ |
1035 | // Try resolving "rd" and "bt" devices first.␊ |
1036 | ␉execute_hook("newRamDisk_BVR", &biosdev, &bvr1, NULL, NULL, NULL, NULL);␊ |
1037 | ␉␊ |
1038 | // Try resolving "rd" and "bt" devices first.␊ |
1039 | ␉␊ |
1040 | ␉if (biosdev == kPseudoBIOSDevBooter)␊ |
1041 | ␉{␊ |
1042 | ␉␉if (bvr1 == NULL )␊ |
1043 | ␉␉␉bvr1 = gBIOSBootVolume;␊ |
1044 | ␉}␊ |
1045 | ␉else␊ |
1046 | ␉{␊ |
1047 | ␉␉// Fetch the volume list from the device.␊ |
1048 | ␊ |
1049 | ␉␉scanBootVolumes( biosdev, NULL );␊ |
1050 | ␉␉bvrChain = getBVChainForBIOSDev(biosdev);␊ |
1051 | ␊ |
1052 | ␉␉// Look for a perfect match based on device and partition number.␊ |
1053 | ␊ |
1054 | ␉␉for ( bvr1 = NULL, bvr = bvrChain; bvr; bvr = bvr->next )␊ |
1055 | ␉␉{␊ |
1056 | ␉␉␉if ( ( bvr->flags & kBVFlagNativeBoot ) == 0 ) continue;␊ |
1057 | ␊ |
1058 | ␉␉␉bvr1 = bvr;␊ |
1059 | ␉␉␉if ( bvr->part_no == partno ) break;␊ |
1060 | ␉␉}␊ |
1061 | ␉}␊ |
1062 | ␊ |
1063 | ␉return bvr ? bvr : bvr1;␊ |
1064 | }␊ |
1065 | ␊ |
1066 | //==========================================================================␊ |
1067 | // getDeviceDescription() - Extracts unit number and partition number␊ |
1068 | // from bvr structure into "dw(u,p)" format.␊ |
1069 | // Returns length of the out string␊ |
1070 | int getDeviceDescription(BVRef bvr, char *str)␊ |
1071 | {␊ |
1072 | if(!str)␊ |
1073 | return 0;␊ |
1074 | ␊ |
1075 | ␉*str = '\0';␊ |
1076 | ␊ |
1077 | ␉if (bvr)␊ |
1078 | ␉{␊ |
1079 | const struct devsw *dp = devsw;␊ |
1080 | ␉␉while(dp->name && bvr->biosdev >= dp->biosdev)␊ |
1081 | dp++;␊ |
1082 | ␊ |
1083 | ␉␉dp--;␊ |
1084 | ␉␉if (dp->name)␊ |
1085 | return sprintf(str, "%s(%d,%d)", dp->name, bvr->biosdev - dp->biosdev, bvr->part_no);␊ |
1086 | ␉}␊ |
1087 | ␉␊ |
1088 | ␉return 0;␊ |
1089 | }␊ |
1090 | |