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Source at commit 1085 created 13 years 1 month ago. By azimutz, Runaway "min"; fixes build. | |
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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 "disk.h"␊ |
65 | #include "xml.h"␊ |
66 | ␊ |
67 | #include <libkern/crypto/md5.h>␊ |
68 | //#include <uuid/uuid.h>␊ |
69 | ␊ |
70 | #if 0 /* No OS X release has ever included this. */␊ |
71 | #include <Kernel/uuid/namespace.h>␊ |
72 | #else␊ |
73 | // from our uuid/namespace.h (UFS and HFS uuids can live in the same space?)␊ |
74 | static unsigned char kFSUUIDNamespaceSHA1[] = {0xB3,0xE2,0x0F,0x39,0xF2,0x92,0x11,0xD6,0x97,0xA4,0x00,0x30,0x65,0x43,0xEC,0xAC};␊ |
75 | #endif␊ |
76 | ␊ |
77 | extern int multiboot_partition;␊ |
78 | extern int multiboot_partition_set;␊ |
79 | ␊ |
80 | struct devsw {␊ |
81 | const char * name;␊ |
82 | // size increased from char to short to handle non-BIOS internal devices␊ |
83 | unsigned short biosdev;␊ |
84 | int type;␊ |
85 | };␊ |
86 | ␊ |
87 | // Device entries must be ordered by bios device numbers. ␊ |
88 | static struct devsw devsw[] =␊ |
89 | {␊ |
90 | { "hd", 0x80, kBIOSDevTypeHardDrive }, /* DEV_HD */␊ |
91 | { "en", 0xE0, kBIOSDevTypeNetwork }, /* DEV_EN */␊ |
92 | { "rd", 0x100, kBIOSDevTypeHardDrive },␊ |
93 | { "bt", 0x101, kBIOSDevTypeHardDrive }, // turbo - type for booter partition␊ |
94 | { 0, 0 }␊ |
95 | };␊ |
96 | ␊ |
97 | // Pseudo BIOS devices␊ |
98 | enum {␊ |
99 | ␉kPseudoBIOSDevRAMDisk = 0x100,␊ |
100 | ␉kPseudoBIOSDevBooter = 0x101␊ |
101 | };␊ |
102 | ␊ |
103 | /*␊ |
104 | * Max number of file descriptors.␊ |
105 | */␊ |
106 | #define NFILES 6␊ |
107 | ␊ |
108 | static struct iob iob[NFILES];␊ |
109 | ␊ |
110 | void * gFSLoadAddress = 0;␊ |
111 | ␊ |
112 | // Turbo - save what we think is our original BIOS boot volume if we have one 0xab␊ |
113 | BVRef gBIOSBootVolume = NULL;␊ |
114 | BVRef gBootVolume;␊ |
115 | ␊ |
116 | //static BVRef getBootVolumeRef( const char * path, const char ** outPath );␊ |
117 | static BVRef newBootVolumeRef( int biosdev, int partno );␊ |
118 | ␊ |
119 | //==========================================================================␊ |
120 | // LoadVolumeFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
121 | // Load the specified file from the specified volume␊ |
122 | // to the load buffer at LOAD_ADDR.␊ |
123 | // If the file is fat, load only the i386 portion.␊ |
124 | ␊ |
125 | long LoadVolumeFile(BVRef bvr, const char *filePath)␊ |
126 | {␊ |
127 | long fileSize;␊ |
128 | ␊ |
129 | // Read file into load buffer. The data in the load buffer will be␊ |
130 | // overwritten by the next LoadFile() call.␊ |
131 | ␊ |
132 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
133 | ␊ |
134 | fileSize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
135 | ␊ |
136 | // Return the size of the file, or -1 if load failed.␊ |
137 | ␊ |
138 | return fileSize;␊ |
139 | }␊ |
140 | ␊ |
141 | //==========================================================================␊ |
142 | // LoadFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
143 | // Load the specified file to the load buffer at LOAD_ADDR.␊ |
144 | // If the file is fat, load only the i386 portion.␊ |
145 | ␊ |
146 | long LoadFile(const char * fileSpec)␊ |
147 | {␊ |
148 | const char * filePath;␊ |
149 | BVRef bvr;␊ |
150 | ␊ |
151 | // Resolve the boot volume from the file spec.␊ |
152 | ␊ |
153 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
154 | return -1;␊ |
155 | ␊ |
156 | return LoadVolumeFile(bvr, filePath);␊ |
157 | }␊ |
158 | ␊ |
159 | long ReadFileAtOffset(const char * fileSpec, void *buffer, uint64_t offset, uint64_t length)␊ |
160 | {␊ |
161 | const char *filePath;␊ |
162 | BVRef bvr;␊ |
163 | ␊ |
164 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
165 | return -1;␊ |
166 | ␊ |
167 | if (bvr->fs_readfile == NULL)␊ |
168 | return -1;␊ |
169 | ␊ |
170 | return bvr->fs_readfile(bvr, (char *)filePath, buffer, offset, length);␊ |
171 | }␊ |
172 | ␊ |
173 | long LoadThinFatFile(const char *fileSpec, void **binary)␊ |
174 | {␊ |
175 | const char *filePath;␊ |
176 | FSReadFile readFile;␊ |
177 | BVRef bvr;␊ |
178 | unsigned long length, length2;␊ |
179 | ␊ |
180 | // Resolve the boot volume from the file spec.␊ |
181 | ␊ |
182 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
183 | return -1;␊ |
184 | ␊ |
185 | *binary = (void *)kLoadAddr;␊ |
186 | ␊ |
187 | // Read file into load buffer. The data in the load buffer will be␊ |
188 | // overwritten by the next LoadFile() call.␊ |
189 | ␊ |
190 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
191 | ␊ |
192 | readFile = bvr->fs_readfile;␊ |
193 | ␊ |
194 | if (readFile != NULL) {␊ |
195 | // Read the first 4096 bytes (fat header)␊ |
196 | length = readFile(bvr, (char *)filePath, *binary, 0, 0x1000);␊ |
197 | if (length > 0) {␊ |
198 | if (ThinFatFile(binary, &length) == 0) {␊ |
199 | ␉␉␉␉if (length == 0)␊ |
200 | ␉␉␉␉␉return 0;␊ |
201 | // We found a fat binary; read only the thin part␊ |
202 | length = readFile(bvr, (char *)filePath,␊ |
203 | (void *)kLoadAddr, (unsigned long)(*binary) - kLoadAddr, length);␊ |
204 | *binary = (void *)kLoadAddr;␊ |
205 | } else {␊ |
206 | // Not a fat binary; read the rest of the file␊ |
207 | length2 = readFile(bvr, (char *)filePath, (void *)(kLoadAddr + length), length, 0);␊ |
208 | if (length2 == -1) return -1;␊ |
209 | length += length2;␊ |
210 | }␊ |
211 | }␊ |
212 | } else {␊ |
213 | length = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
214 | if (length > 0) {␊ |
215 | ThinFatFile(binary, &length);␊ |
216 | }␊ |
217 | }␊ |
218 | ␊ |
219 | return length;␊ |
220 | }␊ |
221 | ␊ |
222 | #if UNUSED␊ |
223 | long GetFSUUID(char *spec, char *uuidStr)␊ |
224 | {␊ |
225 | BVRef bvr;␊ |
226 | long rval = -1;␊ |
227 | const char *devSpec;␊ |
228 | ␊ |
229 | if ((bvr = getBootVolumeRef(spec, &devSpec)) == NULL)␊ |
230 | return -1;␊ |
231 | ␊ |
232 | if(bvr->fs_getuuid)␊ |
233 | rval = bvr->fs_getuuid(bvr, uuidStr);␊ |
234 | ␊ |
235 | return rval;␊ |
236 | }␊ |
237 | #endif␊ |
238 | ␊ |
239 | // filesystem-specific getUUID functions call this shared string generator␊ |
240 | long CreateUUIDString(uint8_t uubytes[], int nbytes, char *uuidStr)␊ |
241 | {␊ |
242 | unsigned fmtbase, fmtidx, i;␊ |
243 | uint8_t uuidfmt[] = { 4, 2, 2, 2, 6 };␊ |
244 | char *p = uuidStr;␊ |
245 | MD5_CTX md5c;␊ |
246 | uint8_t mdresult[16];␊ |
247 | ␊ |
248 | bzero(mdresult, sizeof(mdresult));␊ |
249 | ␊ |
250 | // just like AppleFileSystemDriver␊ |
251 | MD5Init(&md5c);␊ |
252 | MD5Update(&md5c, kFSUUIDNamespaceSHA1, sizeof(kFSUUIDNamespaceSHA1));␊ |
253 | MD5Update(&md5c, uubytes, nbytes);␊ |
254 | MD5Final(mdresult, &md5c);␊ |
255 | ␊ |
256 | // this UUID has been made version 3 style (i.e. via namespace)␊ |
257 | // see "-uuid-urn-" IETF draft (which otherwise copies byte for byte)␊ |
258 | mdresult[6] = 0x30 | ( mdresult[6] & 0x0F );␊ |
259 | mdresult[8] = 0x80 | ( mdresult[8] & 0x3F );␊ |
260 | ␊ |
261 | ␊ |
262 | // generate the text: e.g. 5EB1869F-C4FA-3502-BDEB-3B8ED5D87292␊ |
263 | i = 0; fmtbase = 0;␊ |
264 | for(fmtidx = 0; fmtidx < sizeof(uuidfmt); fmtidx++) {␊ |
265 | for(i=0; i < uuidfmt[fmtidx]; i++) {␊ |
266 | uint8_t byte = mdresult[fmtbase+i];␊ |
267 | char nib;␊ |
268 | ␊ |
269 | nib = byte >> 4;␊ |
270 | *p = nib + '0'; // 0x4 -> '4'␊ |
271 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
272 | p++;␊ |
273 | ␊ |
274 | nib = byte & 0xf;␊ |
275 | *p = nib + '0'; // 0x4 -> '4'␊ |
276 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
277 | p++;␊ |
278 | ␊ |
279 | }␊ |
280 | fmtbase += i;␊ |
281 | if(fmtidx < sizeof(uuidfmt)-1)␊ |
282 | *(p++) = '-';␊ |
283 | else␊ |
284 | *p = '\0';␊ |
285 | }␊ |
286 | ␊ |
287 | return 0;␊ |
288 | }␊ |
289 | ␊ |
290 | ␊ |
291 | //==========================================================================␊ |
292 | // GetDirEntry - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
293 | // Fetch the next directory entry for the given directory.␊ |
294 | ␊ |
295 | long GetDirEntry(const char * dirSpec, long long * dirIndex, const char ** name, ␊ |
296 | long * flags, long * time)␊ |
297 | {␊ |
298 | const char * dirPath;␊ |
299 | BVRef bvr;␊ |
300 | ␊ |
301 | // Resolve the boot volume from the dir spec.␊ |
302 | ␊ |
303 | if ((bvr = getBootVolumeRef(dirSpec, &dirPath)) == NULL)␊ |
304 | return -1;␊ |
305 | ␊ |
306 | // Return 0 on success, or -1 if there are no additional entries.␊ |
307 | ␊ |
308 | return bvr->fs_getdirentry( bvr,␊ |
309 | /* dirPath */ (char *)dirPath,␊ |
310 | /* dirIndex */ dirIndex,␊ |
311 | /* dirEntry */ (char **)name, flags, time, 0, 0 );␊ |
312 | }␊ |
313 | ␊ |
314 | //==========================================================================␊ |
315 | // GetFileInfo - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
316 | // Get attributes for the specified file.␊ |
317 | ␊ |
318 | static char* gMakeDirSpec;␊ |
319 | ␊ |
320 | long GetFileInfo(const char * dirSpec, const char * name,␊ |
321 | long * flags, long * time)␊ |
322 | {␊ |
323 | long long index = 0;␊ |
324 | const char * entryName;␊ |
325 | ␊ |
326 | if (gMakeDirSpec == 0)␊ |
327 | gMakeDirSpec = (char *)malloc(1024);␊ |
328 | ␊ |
329 | if (!dirSpec) {␊ |
330 | long idx, len;␊ |
331 | ␊ |
332 | len = strlen(name);␊ |
333 | ␊ |
334 | for (idx = len; idx && (name[idx] != '/' && name[idx] != '\\'); idx--) {}␊ |
335 | if (idx == 0) {␊ |
336 | gMakeDirSpec[0] = '/';␊ |
337 | gMakeDirSpec[1] = '\0';␊ |
338 | } else {␊ |
339 | idx++;␊ |
340 | strncpy(gMakeDirSpec, name, idx);␊ |
341 | name += idx;␊ |
342 | }␊ |
343 | dirSpec = gMakeDirSpec;␊ |
344 | }␊ |
345 | ␊ |
346 | while (GetDirEntry(dirSpec, &index, &entryName, flags, time) == 0)␊ |
347 | {␊ |
348 | if (strcmp(entryName, name) == 0)␊ |
349 | return 0; // success␊ |
350 | }␊ |
351 | return -1; // file not found␊ |
352 | }␊ |
353 | ␊ |
354 | long GetFileBlock(const char *fileSpec, unsigned long long *firstBlock)␊ |
355 | {␊ |
356 | const char * filePath;␊ |
357 | BVRef bvr;␊ |
358 | ␊ |
359 | // Resolve the boot volume from the file spec.␊ |
360 | ␊ |
361 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL) {␊ |
362 | printf("Boot volume for '%s' is bogus\n", fileSpec);␊ |
363 | return -1;␊ |
364 | }␊ |
365 | ␊ |
366 | return bvr->fs_getfileblock(bvr, (char *)filePath, firstBlock);␊ |
367 | }␊ |
368 | ␊ |
369 | //==========================================================================␊ |
370 | // GetFreeFD()␊ |
371 | ␊ |
372 | static int GetFreeFd(void)␊ |
373 | {␊ |
374 | ␉int␉fd;␊ |
375 | ␊ |
376 | ␉// Locate a free descriptor slot.␊ |
377 | ␉for (fd = 0; fd < NFILES; fd++) {␊ |
378 | ␉␉if (iob[fd].i_flgs == 0) {␊ |
379 | ␉␉␉return fd;␊ |
380 | ␉ ␉}␊ |
381 | ␉}␊ |
382 | ␉stop("Out of file descriptors");␊ |
383 | ␉// not reached␊ |
384 | ␉return -1;␊ |
385 | }␊ |
386 | ␊ |
387 | //==========================================================================␊ |
388 | // iob_from_fdesc()␊ |
389 | //␊ |
390 | // Return a pointer to an allocated 'iob' based on the file descriptor␊ |
391 | // provided. Returns NULL if the file descriptor given is invalid.␊ |
392 | ␊ |
393 | static struct iob * iob_from_fdesc(int fdesc)␊ |
394 | {␊ |
395 | register struct iob * io;␊ |
396 | ␊ |
397 | if (fdesc < 0 || fdesc >= NFILES ||␊ |
398 | ((io = &iob[fdesc])->i_flgs & F_ALLOC) == 0)␊ |
399 | return NULL;␊ |
400 | else␊ |
401 | return io;␊ |
402 | }␊ |
403 | ␊ |
404 | //==========================================================================␊ |
405 | // openmem()␊ |
406 | ␊ |
407 | int openmem(char * buf, int len)␊ |
408 | {␊ |
409 | int fdesc;␊ |
410 | struct iob * io;␊ |
411 | ␊ |
412 | fdesc = GetFreeFd();␊ |
413 | io = &iob[fdesc];␊ |
414 | bzero(io, sizeof(*io));␊ |
415 | ␊ |
416 | // Mark the descriptor as taken. Set the F_MEM flag to indicate␊ |
417 | // that the file buffer is provided by the caller.␊ |
418 | ␊ |
419 | io->i_flgs = F_ALLOC | F_MEM;␊ |
420 | io->i_buf = buf;␊ |
421 | io->i_filesize = len;␊ |
422 | ␊ |
423 | return fdesc;␊ |
424 | }␊ |
425 | ␊ |
426 | //==========================================================================␊ |
427 | // open() - Open the file specified by 'path' for reading.␊ |
428 | ␊ |
429 | static int open_bvr(BVRef bvr, const char *filePath, int flags)␊ |
430 | {␊ |
431 | ␉struct iob␉*io;␊ |
432 | ␉int␉␉fdesc;␊ |
433 | ␉int␉␉i;␊ |
434 | ␊ |
435 | ␉if (bvr == NULL) {␊ |
436 | ␉␉return -1;␊ |
437 | ␉}␊ |
438 | ␊ |
439 | ␉fdesc = GetFreeFd();␊ |
440 | ␉io = &iob[fdesc];␊ |
441 | ␉bzero(io, sizeof(*io));␊ |
442 | ␊ |
443 | ␉// Mark the descriptor as taken.␊ |
444 | ␉io->i_flgs = F_ALLOC;␊ |
445 | ␊ |
446 | ␉// Find the next available memory block in the download buffer.␊ |
447 | ␉io->i_buf = (char *) LOAD_ADDR;␊ |
448 | ␉for (i = 0; i < NFILES; i++) {␊ |
449 | ␉␉if ((iob[i].i_flgs != F_ALLOC) || (i == fdesc)) {␊ |
450 | ␉␉␉continue;␊ |
451 | ␉␉}␊ |
452 | ␉␉io->i_buf = MAX(iob[i].i_filesize + iob[i].i_buf, io->i_buf);␊ |
453 | ␉}␊ |
454 | ␊ |
455 | ␉// Load entire file into memory. Unnecessary open() calls must be avoided.␊ |
456 | ␉gFSLoadAddress = io->i_buf;␊ |
457 | ␉io->i_filesize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
458 | ␉if (io->i_filesize < 0) {␊ |
459 | ␉␉close(fdesc);␊ |
460 | ␉␉return -1;␊ |
461 | ␉}␊ |
462 | ␉return fdesc;␊ |
463 | }␊ |
464 | ␊ |
465 | int open(const char *path, int flags)␊ |
466 | {␊ |
467 | ␉const char␉*filepath;␊ |
468 | ␉BVRef␉␉bvr;␊ |
469 | ␊ |
470 | ␉// Resolve the boot volume from the file spec.␊ |
471 | ␉if ((bvr = getBootVolumeRef(path, &filepath)) != NULL) {␊ |
472 | ␉␉return open_bvr(bvr, filepath, flags);␊ |
473 | ␉}␊ |
474 | ␉return -1;␊ |
475 | }␊ |
476 | ␊ |
477 | int open_bvdev(const char *bvd, const char *path, int flags)␊ |
478 | {␊ |
479 | const struct devsw␉*dp;␊ |
480 | ␉const char␉␉*cp;␊ |
481 | ␉BVRef␉␉␉bvr;␊ |
482 | ␉int␉␉␉i;␊ |
483 | ␉int␉␉␉len;␊ |
484 | ␉int␉␉␉unit;␊ |
485 | ␉int␉␉␉partition;␊ |
486 | ␊ |
487 | ␉if ((i = open(path, flags)) >= 0) {␊ |
488 | ␉␉return i;␊ |
489 | ␉}␊ |
490 | ␊ |
491 | ␉if (bvd == NULL || (len = strlen(bvd)) < 2) {␊ |
492 | ␉␉return -1;␊ |
493 | ␉}␊ |
494 | ␊ |
495 | ␉for (dp=devsw; dp->name; dp++) {␊ |
496 | ␉␉if (bvd[0] == dp->name[0] && bvd[1] == dp->name[1]) {␊ |
497 | ␉␉␉unit = 0;␊ |
498 | ␉␉␉partition = 0;␊ |
499 | ␉␉␉/* get optional unit and partition */␊ |
500 | ␉␉␉if (len >= 5 && bvd[2] == '(') { /* min must be present xx(0) */␊ |
501 | ␉␉␉␉cp = &bvd[3];␊ |
502 | ␉␉␉␉i = 0;␊ |
503 | ␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
504 | ␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
505 | ␉␉␉␉␉unit = i;␊ |
506 | ␉␉␉␉}␊ |
507 | ␉␉␉␉if (*cp++ == ',') {␊ |
508 | ␉␉␉␉␉i = 0;␊ |
509 | ␉␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
510 | ␉␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
511 | ␉␉␉␉␉␉partition = i;␊ |
512 | ␉␉␉␉␉}␊ |
513 | ␉␉␉␉}␊ |
514 | ␉␉␉}␊ |
515 | ␉␉␉bvr = newBootVolumeRef(dp->biosdev + unit, partition);␊ |
516 | ␉␉␉return open_bvr(bvr, path, flags);␊ |
517 | ␉␉}␊ |
518 | }␊ |
519 | ␉return -1;␊ |
520 | }␊ |
521 | ␊ |
522 | //==========================================================================␊ |
523 | // close() - Close a file descriptor.␊ |
524 | ␊ |
525 | int close(int fdesc)␊ |
526 | {␊ |
527 | struct iob * io;␊ |
528 | ␊ |
529 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
530 | return (-1);␊ |
531 | ␊ |
532 | io->i_flgs = 0;␊ |
533 | ␊ |
534 | return 0;␊ |
535 | }␊ |
536 | ␊ |
537 | //==========================================================================␊ |
538 | // lseek() - Reposition the byte offset of the file descriptor from the␊ |
539 | // beginning of the file. Returns the relocated offset.␊ |
540 | ␊ |
541 | int b_lseek(int fdesc, int offset, int ptr)␊ |
542 | {␊ |
543 | struct iob * io;␊ |
544 | ␊ |
545 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
546 | return (-1);␊ |
547 | ␊ |
548 | io->i_offset = offset;␊ |
549 | ␊ |
550 | return offset;␊ |
551 | }␊ |
552 | ␊ |
553 | //==========================================================================␊ |
554 | // tell() - Returns the byte offset of the file descriptor.␊ |
555 | ␊ |
556 | int tell(int fdesc)␊ |
557 | {␊ |
558 | struct iob * io;␊ |
559 | ␊ |
560 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
561 | return 0;␊ |
562 | ␊ |
563 | return io->i_offset;␊ |
564 | }␊ |
565 | ␊ |
566 | //==========================================================================␊ |
567 | // read() - Read up to 'count' bytes of data from the file descriptor␊ |
568 | // into the buffer pointed to by buf.␊ |
569 | ␊ |
570 | int read(int fdesc, char * buf, int count)␊ |
571 | {␊ |
572 | struct iob * io;␊ |
573 | ␊ |
574 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
575 | return (-1);␊ |
576 | ␊ |
577 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
578 | count = io->i_filesize - io->i_offset;␊ |
579 | ␊ |
580 | if (count <= 0)␊ |
581 | return 0; // end of file␊ |
582 | ␊ |
583 | bcopy(io->i_buf + io->i_offset, buf, count);␊ |
584 | ␊ |
585 | io->i_offset += count;␊ |
586 | ␊ |
587 | return count;␊ |
588 | }␊ |
589 | ␊ |
590 | //==========================================================================␊ |
591 | // write() - Write up to 'count' bytes of data to the file descriptor␊ |
592 | // from the buffer pointed to by buf.␊ |
593 | ␊ |
594 | int write(int fdesc, const char * buf, int count)␊ |
595 | {␊ |
596 | struct iob * io;␊ |
597 | ␊ |
598 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
599 | return (-1);␊ |
600 | ␉␊ |
601 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
602 | count = io->i_filesize - io->i_offset;␊ |
603 | ␉␊ |
604 | if (count <= 0)␊ |
605 | return 0; // end of file␊ |
606 | ␉␊ |
607 | bcopy(buf, io->i_buf + io->i_offset, count);␊ |
608 | ␉␊ |
609 | io->i_offset += count;␊ |
610 | ␉␊ |
611 | return count;␊ |
612 | }␊ |
613 | ␊ |
614 | int writebyte(int fdesc, char value)␊ |
615 | {␊ |
616 | struct iob * io;␊ |
617 | ␊ |
618 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
619 | return (-1);␊ |
620 | ␉␊ |
621 | if ((io->i_offset + 1) > (unsigned int)io->i_filesize)␊ |
622 | return 0; // end of file␊ |
623 | ␉␊ |
624 | io->i_buf[io->i_offset++] = value;␊ |
625 | ␉␊ |
626 | return 1;␊ |
627 | }␊ |
628 | ␊ |
629 | int writeint(int fdesc, int value)␊ |
630 | {␊ |
631 | struct iob * io;␊ |
632 | ␊ |
633 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
634 | return (-1);␊ |
635 | ␉␊ |
636 | if ((io->i_offset + 4) > (unsigned int)io->i_filesize)␊ |
637 | return 0; // end of file␊ |
638 | ␉␊ |
639 | bcopy(&value, io->i_buf + io->i_offset, 4);␊ |
640 | ␉␊ |
641 | io->i_offset += 4;␊ |
642 | ␉␊ |
643 | return 4;␊ |
644 | }␊ |
645 | ␊ |
646 | //==========================================================================␊ |
647 | // file_size() - Returns the size of the file described by the file␊ |
648 | // descriptor.␊ |
649 | ␊ |
650 | int file_size(int fdesc)␊ |
651 | {␊ |
652 | struct iob * io;␊ |
653 | ␊ |
654 | if ((io = iob_from_fdesc(fdesc)) == 0)␊ |
655 | return 0;␊ |
656 | ␊ |
657 | return io->i_filesize;␊ |
658 | }␊ |
659 | ␊ |
660 | //==========================================================================␊ |
661 | ␊ |
662 | struct dirstuff * vol_opendir(BVRef bvr, const char * path)␊ |
663 | {␊ |
664 | struct dirstuff * dirp = 0;␊ |
665 | ␊ |
666 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
667 | if (dirp == NULL)␊ |
668 | goto error;␊ |
669 | ␊ |
670 | dirp->dir_path = newString(path);␊ |
671 | if (dirp->dir_path == NULL)␊ |
672 | goto error;␊ |
673 | ␊ |
674 | dirp->dir_bvr = bvr;␊ |
675 | ␊ |
676 | return dirp;␊ |
677 | ␊ |
678 | error:␊ |
679 | closedir(dirp);␊ |
680 | return NULL;␊ |
681 | }␊ |
682 | ␊ |
683 | //==========================================================================␊ |
684 | ␊ |
685 | struct dirstuff * opendir(const char * path)␊ |
686 | {␊ |
687 | struct dirstuff * dirp = 0;␊ |
688 | const char * dirPath;␊ |
689 | BVRef bvr;␊ |
690 | ␊ |
691 | if ((bvr = getBootVolumeRef(path, &dirPath)) == NULL)␊ |
692 | goto error;␊ |
693 | ␊ |
694 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
695 | if (dirp == NULL)␊ |
696 | goto error;␊ |
697 | ␊ |
698 | dirp->dir_path = newString(dirPath);␊ |
699 | if (dirp->dir_path == NULL)␊ |
700 | goto error;␊ |
701 | ␊ |
702 | dirp->dir_bvr = bvr;␊ |
703 | ␊ |
704 | return dirp;␊ |
705 | ␊ |
706 | error:␊ |
707 | closedir(dirp);␊ |
708 | return NULL;␊ |
709 | }␊ |
710 | ␊ |
711 | //==========================================================================␊ |
712 | ␊ |
713 | int closedir(struct dirstuff * dirp)␊ |
714 | {␊ |
715 | if (dirp) {␊ |
716 | if (dirp->dir_path) free(dirp->dir_path);␊ |
717 | free(dirp);␊ |
718 | }␊ |
719 | return 0;␊ |
720 | }␊ |
721 | ␊ |
722 | //==========================================================================␊ |
723 | ␊ |
724 | int readdir(struct dirstuff * dirp, const char ** name, long * flags,␊ |
725 | long * time)␊ |
726 | {␊ |
727 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
728 | /* dirPath */ dirp->dir_path,␊ |
729 | /* dirIndex */ &dirp->dir_index,␊ |
730 | /* dirEntry */ (char **)name, flags, time,␊ |
731 | 0, 0);␊ |
732 | }␊ |
733 | ␊ |
734 | //==========================================================================␊ |
735 | ␊ |
736 | int readdir_ext(struct dirstuff * dirp, const char ** name, long * flags,␊ |
737 | long * time, FinderInfo *finderInfo, long *infoValid)␊ |
738 | {␊ |
739 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
740 | /* dirPath */ dirp->dir_path,␊ |
741 | /* dirIndex */ &dirp->dir_index,␊ |
742 | /* dirEntry */ (char **)name,␊ |
743 | flags, time,␊ |
744 | finderInfo, infoValid);␊ |
745 | }␊ |
746 | ␊ |
747 | //==========================================================================␊ |
748 | ␊ |
749 | const char * systemConfigDir()␊ |
750 | {␊ |
751 | if (gBootFileType == kNetworkDeviceType)␊ |
752 | ␉return "";␊ |
753 | return "/Library/Preferences/SystemConfiguration";␊ |
754 | }␊ |
755 | ␊ |
756 | //==========================================================================␊ |
757 | ␊ |
758 | int gBootFileType;␊ |
759 | ␊ |
760 | void scanBootVolumes( int biosdev, int * count )␊ |
761 | {␊ |
762 | BVRef bvr = 0;␊ |
763 | ␊ |
764 | bvr = diskScanBootVolumes(biosdev, count);␊ |
765 | if (bvr != NULL)␊ |
766 | {␊ |
767 | gBootFileType = kBlockDeviceType;␊ |
768 | }␊ |
769 | }␊ |
770 | ␊ |
771 | //==========================================================================␊ |
772 | ␊ |
773 | void scanDisks(int biosdev, int *count)␊ |
774 | {␊ |
775 | #define MAX_HDD_COUNT 32␊ |
776 | int bvCount;␊ |
777 | int hd = 0;␊ |
778 | ␊ |
779 | // Testing up to MAX_HDD_COUNT hard drives.␊ |
780 | ␉while(!testBiosread(0x80 + hd, 0) && hd < MAX_HDD_COUNT)␊ |
781 | ␉{␊ |
782 | ␉ bvCount = 0;␊ |
783 | ␉ scanBootVolumes(0x80 + hd, &bvCount);␊ |
784 | hd++;␊ |
785 | ␉}␊ |
786 | ␊ |
787 | }␊ |
788 | ␊ |
789 | //==========================================================================␊ |
790 | ␊ |
791 | BVRef selectBootVolume( BVRef chain )␊ |
792 | {␊ |
793 | ␉bool filteredChain = false;␊ |
794 | ␉bool foundPrimary = false;␊ |
795 | ␉BVRef bvr, bvr1 = 0, bvr2 = 0;␊ |
796 | ␉␊ |
797 | ␉if (chain->filtered) filteredChain = true;␊ |
798 | ␉␊ |
799 | ␉if (multiboot_partition_set)␊ |
800 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
801 | ␉␉␉if ( bvr->part_no == multiboot_partition && bvr->biosdev == gBIOSDev ) ␊ |
802 | ␉␉␉␉return bvr;␊ |
803 | ␉␉␊ |
804 | ␉/*␊ |
805 | ␉ * Scannig the volume chain backwards and trying to find ␊ |
806 | ␉ * a HFS+ volume with valid boot record signature.␊ |
807 | ␉ * If not found any active partition then we will␊ |
808 | ␉ * select this volume as the boot volume.␊ |
809 | ␉ */␊ |
810 | ␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
811 | ␉{␊ |
812 | ␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) foundPrimary = true;␊ |
813 | ␉␉// zhell -- Undo a regression that was introduced from r491 to 492.␊ |
814 | ␉␉// if gBIOSBootVolume is set already, no change is required␊ |
815 | ␉␉if ( bvr->flags & (kBVFlagBootable|kBVFlagSystemVolume)␊ |
816 | ␉␉␉&& gBIOSBootVolume␊ |
817 | ␉␉␉&& (!filteredChain || (filteredChain && bvr->visible))␊ |
818 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
819 | ␉␉␉bvr2 = bvr;␊ |
820 | ␉␉// zhell -- if gBIOSBootVolume is NOT set, we use the "if" statement␊ |
821 | ␉␉// from r491,␊ |
822 | ␉␉if ( bvr->flags & kBVFlagBootable␊ |
823 | ␉␉␉&& ! gBIOSBootVolume␊ |
824 | ␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
825 | ␉␉␉bvr2 = bvr;␊ |
826 | ␉} ␊ |
827 | ␉␊ |
828 | ␉␊ |
829 | ␉/*␊ |
830 | ␉ * Use the standrad method for selecting the boot volume.␊ |
831 | ␉ */␊ |
832 | ␉if (foundPrimary)␊ |
833 | ␉{␊ |
834 | ␉␉for ( bvr = chain; bvr; bvr = bvr->next )␊ |
835 | ␉␉{␊ |
836 | ␉␉␉if ( bvr->flags & kBVFlagNativeBoot && bvr->biosdev == gBIOSDev ) bvr1 = bvr;␊ |
837 | ␉␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) bvr2 = bvr;␊ |
838 | ␉␉}␊ |
839 | ␉}␊ |
840 | ␉␊ |
841 | ␉bvr = bvr2 ? bvr2 :␊ |
842 | ␉bvr1 ? bvr1 : chain;␊ |
843 | ␉␊ |
844 | ␉return bvr;␊ |
845 | }␊ |
846 | ␊ |
847 | //==========================================================================␊ |
848 | ␊ |
849 | #define LP '('␊ |
850 | #define RP ')'␊ |
851 | int gBIOSDev;␊ |
852 | ␊ |
853 | /*!␊ |
854 | This is like boot2's gBootVolume except it is for the internal use of␊ |
855 | libsaio to track which volume an unqualified path should be relative to.␊ |
856 | This replaces bootInfo->kernDev as the carrier of this information.␊ |
857 | */␊ |
858 | static BVRef gRootVolume;␊ |
859 | ␊ |
860 | void setRootVolume(BVRef volume)␊ |
861 | {␊ |
862 | gRootVolume = volume;␊ |
863 | // Veto non-native FS. Basically that means don't allow the root volume to␊ |
864 | // be set to a volume we can't read files from.␊ |
865 | if(gRootVolume != NULL && ((gRootVolume->flags & kBVFlagNativeBoot) == 0))␊ |
866 | gRootVolume = NULL;␊ |
867 | }␊ |
868 | ␊ |
869 | void setBootGlobals(BVRef chain)␊ |
870 | {␊ |
871 | // Record default boot device.␊ |
872 | gBootVolume = selectBootVolume(chain);␊ |
873 | ␊ |
874 | // turbo - Save the ORIGINAL boot volume too for loading our mkext␊ |
875 | if (!gBIOSBootVolume) gBIOSBootVolume = gBootVolume;␊ |
876 | ␊ |
877 | setRootVolume(gBootVolume);␉␊ |
878 | }␊ |
879 | ␊ |
880 | /*!␊ |
881 | Extracts the volume selector from the pathname, returns the selected␊ |
882 | BVRef, and sets *outPath to the remainder of the path.␊ |
883 | If the path did not include a volume selector then the current volume␊ |
884 | is used. When called with a volume selector the current volume␊ |
885 | is changed to the selected volume unless the volume selector is␊ |
886 | that of a ramdisk.␊ |
887 | */␊ |
888 | BVRef getBootVolumeRef( const char * path, const char ** outPath )␊ |
889 | {␊ |
890 | const char * cp;␊ |
891 | BVRef bvr = gRootVolume;␊ |
892 | int biosdev = gBIOSDev;␊ |
893 | ␊ |
894 | // Search for left parenthesis in the path specification.␊ |
895 | ␊ |
896 | for (cp = path; *cp; cp++) {␊ |
897 | if (*cp == LP || *cp == '/') break;␊ |
898 | }␊ |
899 | ␊ |
900 | if (*cp != LP) // no left paren found␊ |
901 | {␊ |
902 | // Path is using the implicit current device so if there is␊ |
903 | // no current device, then we must fail.␊ |
904 | cp = path;␊ |
905 | if ( gRootVolume == NULL )␊ |
906 | return NULL;␊ |
907 | }␊ |
908 | else if ((cp - path) == 2) // found "xx("␊ |
909 | {␊ |
910 | const struct devsw * dp;␊ |
911 | const char * xp = path;␊ |
912 | int i;␊ |
913 | int unit = -1;␊ |
914 | int part = -1;␊ |
915 | ␊ |
916 | cp++;␊ |
917 | ␊ |
918 | // Check the 2 character device name pointed by 'xp'.␊ |
919 | ␊ |
920 | for (dp = devsw; dp->name; dp++)␊ |
921 | {␊ |
922 | if ((xp[0] == dp->name[0]) && (xp[1] == dp->name[1]))␊ |
923 | break; // found matching entry␊ |
924 | }␊ |
925 | if (dp->name == NULL)␊ |
926 | {␊ |
927 | error("Unknown device '%c%c'\n", xp[0], xp[1]);␊ |
928 | return NULL;␊ |
929 | }␊ |
930 | ␊ |
931 | // Extract the optional unit number from the specification.␊ |
932 | // hd(unit) or hd(unit, part).␊ |
933 | ␊ |
934 | i = 0;␊ |
935 | while (*cp >= '0' && *cp <= '9')␊ |
936 | {␊ |
937 | i = i * 10 + *cp++ - '0';␊ |
938 | unit = i;␊ |
939 | }␊ |
940 | ␊ |
941 | // Unit is no longer optional and never really was.␊ |
942 | // If the user failed to specify it then the unit number from the previous kernDev␊ |
943 | // would have been used which makes little sense anyway.␊ |
944 | // For example, if the user did fd()/foobar and the current root device was the␊ |
945 | // second hard disk (i.e. unit 1) then fd() would select the second floppy drive!␊ |
946 | if(unit == -1)␊ |
947 | return NULL;␊ |
948 | ␊ |
949 | // Extract the optional partition number from the specification.␊ |
950 | ␊ |
951 | if (*cp == ',')␊ |
952 | part = atoi(++cp);␊ |
953 | ␊ |
954 | // If part is not specified part will be -1 whereas before it would have been␊ |
955 | // whatever the last partition was which makes about zero sense if the device␊ |
956 | // has been switched.␊ |
957 | ␊ |
958 | // Skip past the right paren.␊ |
959 | ␊ |
960 | for ( ; *cp && *cp != RP; cp++) /* LOOP */;␊ |
961 | if (*cp == RP) cp++;␊ |
962 | ␊ |
963 | biosdev = dp->biosdev + unit;␊ |
964 | bvr = newBootVolumeRef(biosdev, part);␊ |
965 | ␊ |
966 | if(bvr == NULL)␊ |
967 | return NULL;␊ |
968 | }␊ |
969 | else␊ |
970 | {␊ |
971 | // Bad device specifier, skip past the right paren.␊ |
972 | ␊ |
973 | for ( cp++; *cp && *cp != RP; cp++) /* LOOP */;␊ |
974 | if (*cp == RP) cp++;␊ |
975 | // If gRootVolume was NULL, then bvr will be NULL as well which␊ |
976 | // should be caught by the caller.␊ |
977 | }␊ |
978 | ␊ |
979 | // Returns the file path following the device spec.␊ |
980 | // e.g. 'hd(1,b)mach_kernel' is reduced to 'mach_kernel'.␊ |
981 | ␊ |
982 | *outPath = cp;␊ |
983 | ␊ |
984 | return bvr;␊ |
985 | }␊ |
986 | ␊ |
987 | //==========================================================================␊ |
988 | // Function name is a misnomer as scanBootVolumes usually calls diskScanBootVolumes␊ |
989 | // which caches the information. So it's only allocated on the first run.␊ |
990 | static BVRef newBootVolumeRef( int biosdev, int partno )␊ |
991 | {␊ |
992 | ␉BVRef bvr, bvr1, bvrChain;␊ |
993 | ␊ |
994 | ␉bvr = bvr1 = NULL;␊ |
995 | ␊ |
996 | ␉{␊ |
997 | ␉␉// Fetch the volume list from the device.␊ |
998 | ␊ |
999 | ␉␉scanBootVolumes( biosdev, NULL );␊ |
1000 | ␉␉bvrChain = getBVChainForBIOSDev(biosdev);␊ |
1001 | ␊ |
1002 | ␉␉// Look for a perfect match based on device and partition number.␊ |
1003 | ␊ |
1004 | ␉␉for ( bvr1 = NULL, bvr = bvrChain; bvr; bvr = bvr->next )␊ |
1005 | ␉␉{␊ |
1006 | ␉␉␉if ( ( bvr->flags & kBVFlagNativeBoot ) == 0 ) continue;␊ |
1007 | ␊ |
1008 | ␉␉␉bvr1 = bvr;␊ |
1009 | ␉␉␉if ( bvr->part_no == partno ) break;␊ |
1010 | ␉␉}␊ |
1011 | ␉}␊ |
1012 | ␊ |
1013 | ␉return bvr ? bvr : bvr1;␊ |
1014 | }␊ |
1015 | ␊ |
1016 | //==========================================================================␊ |
1017 | // getDeviceDescription() - Extracts unit number and partition number␊ |
1018 | // from bvr structure into "dw(u,p)" format.␊ |
1019 | // Returns length of the out string␊ |
1020 | int getDeviceDescription(BVRef bvr, char *str)␊ |
1021 | {␊ |
1022 | if(!str)␊ |
1023 | return 0;␊ |
1024 | ␊ |
1025 | ␉*str = '\0';␊ |
1026 | ␊ |
1027 | ␉if (bvr)␊ |
1028 | ␉{␊ |
1029 | const struct devsw *dp = devsw;␊ |
1030 | ␉␉while(dp->name && bvr->biosdev >= dp->biosdev)␊ |
1031 | dp++;␊ |
1032 | ␊ |
1033 | ␉␉dp--;␊ |
1034 | ␉␉if (dp->name)␊ |
1035 | return sprintf(str, "%s(%d,%d)", dp->name, bvr->biosdev - dp->biosdev, bvr->part_no);␊ |
1036 | ␉}␊ |
1037 | ␉␊ |
1038 | ␉return 0;␊ |
1039 | }␊ |
1040 |