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Commit | Line | Data |
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66e19ef8 | 1 | /* minix.c - The minix filesystem, version 1 and 2. */ |
2 | /* | |
3 | * GRUB -- GRand Unified Bootloader | |
78026bce | 4 | * Copyright (C) 2004, 2005 Free Software Foundation, Inc. |
66e19ef8 | 5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | ||
21 | #include <grub/err.h> | |
22 | #include <grub/file.h> | |
23 | #include <grub/mm.h> | |
24 | #include <grub/misc.h> | |
25 | #include <grub/disk.h> | |
26 | #include <grub/dl.h> | |
27 | #include <grub/types.h> | |
28 | ||
29 | #define GRUB_MINIX_MAGIC 0x137F | |
30 | #define GRUB_MINIX2_MAGIC 0x2468 | |
31 | #define GRUB_MINIX_MAGIC_30 0x138F | |
32 | #define GRUB_MINIX2_MAGIC_30 0x2478 | |
33 | #define GRUB_MINIX_BSIZE 1024U | |
34 | #define GRUB_MINIX_LOG2_BSIZE 1 | |
35 | #define GRUB_MINIX_ROOT_INODE 1 | |
36 | #define GRUB_MINIX_MAX_SYMLNK_CNT 8 | |
37 | #define GRUB_MINIX_SBLOCK 2 | |
38 | ||
39 | #define GRUB_MINIX_IFDIR 0040000U | |
40 | #define GRUB_MINIX_IFLNK 0120000U | |
41 | ||
42 | #define GRUB_MINIX_INODE(data,field) (data->version == 1 ? \ | |
43 | data->inode. field : data->inode2. field) | |
44 | #define GRUB_MINIX_INODE_ENDIAN(data,field,bits1,bits2) (data->version == 1 ? \ | |
45 | grub_le_to_cpu##bits1 (data->inode.field) : \ | |
46 | grub_le_to_cpu##bits2 (data->inode2.field)) | |
47 | #define GRUB_MINIX_INODE_SIZE(data) GRUB_MINIX_INODE_ENDIAN (data,size,16,32) | |
48 | #define GRUB_MINIX_INODE_MODE(data) GRUB_MINIX_INODE_ENDIAN (data,mode,16,16) | |
49 | #define GRUB_MINIX_INODE_DIR_ZONES(data,blk) GRUB_MINIX_INODE_ENDIAN \ | |
50 | (data,dir_zones[blk],16,32) | |
51 | #define GRUB_MINIX_INODE_INDIR_ZONE(data) \ | |
52 | GRUB_MINIX_INODE_ENDIAN (data,indir_zone,16,32) | |
53 | #define GRUB_MINIX_INODE_DINDIR_ZONE(data) \ | |
54 | GRUB_MINIX_INODE_ENDIAN (data,double_indir_zone,16,32) | |
55 | #define GRUB_MINIX_INODE_BLKSZ(data) (data->version == 1 ? 2 : 4) | |
56 | #define GRUB_MINIX_LOG2_ZONESZ (GRUB_MINIX_LOG2_BSIZE \ | |
57 | + grub_le_to_cpu16 (sblock->log2_zone_size)) | |
58 | #define GRUB_MINIX_ZONESZ (GRUB_MINIX_BSIZE \ | |
59 | << grub_le_to_cpu16 (sblock->log2_zone_size)) | |
60 | ||
61 | struct grub_minix_sblock | |
62 | { | |
63 | grub_uint16_t inode_cnt; | |
64 | grub_uint16_t zone_cnt; | |
65 | grub_uint16_t inode_bmap_size; | |
66 | grub_uint16_t zone_bmap_size; | |
67 | grub_uint16_t first_data_zone; | |
68 | grub_uint16_t log2_zone_size; | |
69 | grub_uint32_t max_file_size; | |
70 | grub_uint16_t magic; | |
71 | }; | |
72 | ||
73 | struct grub_minix_inode | |
74 | { | |
75 | grub_uint16_t mode; | |
76 | grub_uint16_t uid; | |
77 | grub_uint16_t size; | |
78 | grub_uint32_t ctime; | |
79 | grub_uint8_t gid; | |
80 | grub_uint8_t nlinks; | |
81 | grub_uint16_t dir_zones[7]; | |
82 | grub_uint16_t indir_zone; | |
83 | grub_uint16_t double_indir_zone; | |
84 | }; | |
85 | ||
86 | struct grub_minix2_inode | |
87 | { | |
88 | grub_uint16_t mode; | |
89 | grub_uint16_t nlinks; | |
90 | grub_uint16_t uid; | |
91 | grub_uint16_t gid; | |
92 | grub_uint32_t size; | |
93 | grub_uint32_t atime; | |
94 | grub_uint32_t mtime; | |
95 | grub_uint32_t ctime; | |
96 | grub_uint32_t dir_zones[7]; | |
97 | grub_uint32_t indir_zone; | |
98 | grub_uint32_t double_indir_zone; | |
99 | grub_uint32_t unused; | |
100 | ||
101 | }; | |
102 | ||
103 | /* Information about a "mounted" minix filesystem. */ | |
104 | struct grub_minix_data | |
105 | { | |
106 | struct grub_minix_sblock sblock; | |
107 | struct grub_minix_inode inode; | |
108 | struct grub_minix2_inode inode2; | |
109 | int ino; | |
110 | int linknest; | |
111 | grub_disk_t disk; | |
112 | int version; | |
113 | int filename_size; | |
114 | }; | |
115 | ||
116 | #ifndef GRUB_UTIL | |
117 | static grub_dl_t my_mod; | |
118 | #endif | |
119 | \f | |
120 | static grub_err_t grub_minix_find_file (struct grub_minix_data *data, | |
121 | const char *path); | |
122 | ||
123 | static int | |
124 | grub_minix_get_file_block (struct grub_minix_data *data, unsigned int blk) | |
125 | { | |
126 | struct grub_minix_sblock *sblock = &data->sblock; | |
127 | int indir; | |
128 | ||
94bc45af | 129 | auto int grub_get_indir (int, int); |
130 | ||
66e19ef8 | 131 | /* Read the block pointer in ZONE, on the offset NUM. */ |
132 | int grub_get_indir (int zone, int num) | |
133 | { | |
134 | if (data->version == 1) | |
135 | { | |
94bc45af | 136 | grub_uint16_t indir16; |
66e19ef8 | 137 | grub_disk_read (data->disk, |
138 | zone << GRUB_MINIX_LOG2_ZONESZ, | |
139 | sizeof (grub_uint16_t) * num, | |
94bc45af | 140 | sizeof (grub_uint16_t), (char *) &indir16); |
141 | return grub_le_to_cpu16 (indir16); | |
66e19ef8 | 142 | } |
143 | else | |
144 | { | |
94bc45af | 145 | grub_uint32_t indir32; |
66e19ef8 | 146 | grub_disk_read (data->disk, |
147 | zone << GRUB_MINIX_LOG2_ZONESZ, | |
148 | sizeof (grub_uint32_t) * num, | |
94bc45af | 149 | sizeof (grub_uint32_t), (char *) &indir32); |
150 | return grub_le_to_cpu32 (indir32); | |
66e19ef8 | 151 | } |
152 | } | |
153 | ||
154 | /* Direct block. */ | |
155 | if (blk < 7) | |
156 | return GRUB_MINIX_INODE_DIR_ZONES (data, blk); | |
157 | ||
158 | /* Indirect block. */ | |
159 | blk -= 7; | |
160 | if (blk < GRUB_MINIX_ZONESZ / GRUB_MINIX_INODE_BLKSZ (data)) | |
161 | { | |
162 | indir = grub_get_indir (GRUB_MINIX_INODE_INDIR_ZONE (data), blk); | |
163 | return indir; | |
164 | } | |
165 | ||
166 | /* Double indirect block. */ | |
167 | blk -= GRUB_MINIX_ZONESZ / GRUB_MINIX_INODE_BLKSZ (data); | |
168 | if (blk < (GRUB_MINIX_ZONESZ / GRUB_MINIX_INODE_BLKSZ (data)) | |
169 | * (GRUB_MINIX_ZONESZ / GRUB_MINIX_INODE_BLKSZ (data))) | |
170 | { | |
171 | indir = grub_get_indir (GRUB_MINIX_INODE_DINDIR_ZONE (data), | |
172 | blk / GRUB_MINIX_ZONESZ); | |
173 | ||
174 | indir = grub_get_indir (indir, blk % GRUB_MINIX_ZONESZ); | |
175 | ||
176 | return indir; | |
177 | } | |
178 | ||
179 | /* This should never happen. */ | |
180 | grub_error (GRUB_ERR_OUT_OF_RANGE, "file bigger than maximum size"); | |
181 | ||
182 | return 0; | |
183 | } | |
184 | ||
185 | ||
186 | /* Read LEN bytes from the file described by DATA starting with byte | |
187 | POS. Return the amount of read bytes in READ. */ | |
188 | static grub_ssize_t | |
189 | grub_minix_read_file (struct grub_minix_data *data, | |
190 | void (*read_hook) (unsigned long sector, | |
191 | unsigned offset, unsigned length), | |
192 | int pos, unsigned int len, char *buf) | |
193 | { | |
194 | struct grub_minix_sblock *sblock = &data->sblock; | |
195 | int i; | |
196 | int blockcnt; | |
197 | ||
198 | /* Adjust len so it we can't read past the end of the file. */ | |
199 | if (len > GRUB_MINIX_INODE_SIZE (data)) | |
200 | len = GRUB_MINIX_INODE_SIZE (data); | |
201 | ||
202 | blockcnt = (len + pos + GRUB_MINIX_BSIZE - 1) / GRUB_MINIX_BSIZE; | |
203 | ||
204 | for (i = pos / GRUB_MINIX_BSIZE; i < blockcnt; i++) | |
205 | { | |
206 | int blknr; | |
207 | int blockoff = pos % GRUB_MINIX_BSIZE; | |
208 | int blockend = GRUB_MINIX_BSIZE; | |
209 | ||
210 | int skipfirst = 0; | |
211 | ||
212 | blknr = grub_minix_get_file_block (data, i); | |
213 | if (grub_errno) | |
214 | return -1; | |
215 | ||
216 | /* Last block. */ | |
217 | if (i == blockcnt - 1) | |
218 | { | |
219 | blockend = (len + pos) % GRUB_MINIX_BSIZE; | |
220 | ||
221 | if (!blockend) | |
222 | blockend = GRUB_MINIX_BSIZE; | |
223 | } | |
224 | ||
225 | /* First block. */ | |
226 | if (i == (pos / (int) GRUB_MINIX_BSIZE)) | |
227 | { | |
228 | skipfirst = blockoff; | |
229 | blockend -= skipfirst; | |
230 | } | |
231 | ||
232 | data->disk->read_hook = read_hook; | |
233 | grub_disk_read (data->disk, blknr << GRUB_MINIX_LOG2_ZONESZ, | |
234 | skipfirst, blockend, buf); | |
235 | ||
236 | data->disk->read_hook = 0; | |
237 | if (grub_errno) | |
238 | return -1; | |
239 | ||
240 | buf += GRUB_MINIX_BSIZE - skipfirst; | |
241 | } | |
242 | ||
243 | return len; | |
244 | } | |
245 | ||
246 | ||
247 | /* Read inode INO from the mounted filesystem described by DATA. This | |
248 | inode is used by default now. */ | |
249 | static grub_err_t | |
250 | grub_minix_read_inode (struct grub_minix_data *data, int ino) | |
251 | { | |
252 | struct grub_minix_sblock *sblock = &data->sblock; | |
253 | ||
254 | /* Block in which the inode is stored. */ | |
255 | int block; | |
256 | data->ino = ino; | |
257 | ||
258 | /* The first inode in minix is inode 1. */ | |
259 | ino--; | |
260 | ||
261 | block = ((2 + grub_le_to_cpu16 (sblock->inode_bmap_size) | |
262 | + grub_le_to_cpu16 (sblock->zone_bmap_size)) | |
263 | << GRUB_MINIX_LOG2_BSIZE); | |
264 | ||
265 | if (data->version == 1) | |
266 | { | |
267 | block += ino / (GRUB_DISK_SECTOR_SIZE / sizeof (struct grub_minix_inode)); | |
268 | int offs = (ino % (GRUB_DISK_SECTOR_SIZE | |
269 | / sizeof (struct grub_minix_inode)) | |
270 | * sizeof (struct grub_minix_inode)); | |
271 | ||
272 | grub_disk_read (data->disk, block, offs, | |
273 | sizeof (struct grub_minix_inode), (char *) &data->inode); | |
274 | } | |
275 | else | |
276 | { | |
277 | block += ino / (GRUB_DISK_SECTOR_SIZE | |
278 | / sizeof (struct grub_minix2_inode)); | |
279 | int offs = (ino | |
280 | % (GRUB_DISK_SECTOR_SIZE / sizeof (struct grub_minix2_inode)) | |
281 | * sizeof (struct grub_minix2_inode)); | |
282 | ||
283 | grub_disk_read (data->disk, block, offs, | |
284 | sizeof (struct grub_minix2_inode),(char *) &data->inode2); | |
285 | } | |
286 | ||
287 | return GRUB_ERR_NONE; | |
288 | } | |
289 | ||
290 | ||
291 | /* Lookup the symlink the current inode points to. INO is the inode | |
292 | number of the directory the symlink is relative to. */ | |
293 | static grub_err_t | |
294 | grub_minix_lookup_symlink (struct grub_minix_data *data, int ino) | |
295 | { | |
296 | char symlink[GRUB_MINIX_INODE_SIZE (data) + 1]; | |
297 | ||
298 | if (++data->linknest > GRUB_MINIX_MAX_SYMLNK_CNT) | |
299 | return grub_error (GRUB_ERR_SYMLINK_LOOP, "too deep nesting of symlinks"); | |
300 | ||
301 | if (grub_minix_read_file (data, 0, 0, | |
302 | GRUB_MINIX_INODE_SIZE (data), symlink) < 0) | |
303 | return grub_errno; | |
304 | ||
305 | symlink[GRUB_MINIX_INODE_SIZE (data)] = '\0'; | |
306 | ||
307 | /* The symlink is an absolute path, go back to the root inode. */ | |
308 | if (symlink[0] == '/') | |
309 | ino = GRUB_MINIX_ROOT_INODE; | |
310 | ||
311 | /* Now load in the old inode. */ | |
312 | if (grub_minix_read_inode (data, ino)) | |
313 | return grub_errno; | |
314 | ||
315 | grub_minix_find_file (data, symlink); | |
316 | if (grub_errno) | |
317 | grub_error (grub_errno, "Can not follow symlink `%s'.", symlink); | |
318 | ||
319 | return grub_errno; | |
320 | } | |
321 | ||
322 | ||
323 | /* Find the file with the pathname PATH on the filesystem described by | |
324 | DATA. */ | |
325 | static grub_err_t | |
326 | grub_minix_find_file (struct grub_minix_data *data, const char *path) | |
327 | { | |
78026bce | 328 | char fpath[grub_strlen (path) + 1]; |
66e19ef8 | 329 | char *name = fpath; |
330 | char *next; | |
331 | unsigned int pos = 0; | |
332 | int dirino; | |
333 | ||
78026bce | 334 | grub_strcpy (fpath, path); |
66e19ef8 | 335 | |
336 | /* Skip the first slash. */ | |
337 | if (name[0] == '/') | |
338 | { | |
339 | name++; | |
340 | if (!*name) | |
341 | return 0; | |
342 | } | |
343 | ||
344 | /* Extract the actual part from the pathname. */ | |
345 | next = grub_strchr (name, '/'); | |
346 | if (next) | |
347 | { | |
348 | next[0] = '\0'; | |
349 | next++; | |
350 | } | |
351 | ||
352 | do | |
353 | { | |
354 | grub_uint16_t ino; | |
355 | char filename[data->filename_size + 1]; | |
356 | ||
357 | if (grub_strlen (name) == 0) | |
358 | return GRUB_ERR_NONE; | |
359 | ||
360 | if (grub_minix_read_file (data, 0, pos, sizeof (ino), | |
361 | (char *) &ino) < 0) | |
362 | return grub_errno; | |
363 | if (grub_minix_read_file (data, 0, pos + sizeof (ino), | |
364 | data->filename_size, (char *) filename)< 0) | |
365 | return grub_errno; | |
366 | ||
367 | filename[data->filename_size] = '\0'; | |
368 | ||
369 | /* Check if the current direntry matches the current part of the | |
370 | pathname. */ | |
371 | if (!grub_strcmp (name, filename)) | |
372 | { | |
373 | dirino = data->ino; | |
374 | grub_minix_read_inode (data, grub_le_to_cpu16 (ino)); | |
375 | ||
376 | /* Follow the symlink. */ | |
377 | if ((GRUB_MINIX_INODE_MODE (data) | |
378 | & GRUB_MINIX_IFLNK) == GRUB_MINIX_IFLNK) | |
379 | { | |
380 | grub_minix_lookup_symlink (data, dirino); | |
381 | if (grub_errno) | |
382 | return grub_errno; | |
383 | } | |
384 | ||
385 | if (!next) | |
386 | return 0; | |
387 | ||
388 | pos = 0; | |
389 | ||
390 | name = next; | |
391 | next = grub_strchr (name, '/'); | |
392 | if (next) | |
393 | { | |
394 | next[0] = '\0'; | |
395 | next++; | |
396 | } | |
397 | ||
398 | if ((GRUB_MINIX_INODE_MODE (data) | |
399 | & GRUB_MINIX_IFDIR) != GRUB_MINIX_IFDIR) | |
400 | return grub_error (GRUB_ERR_BAD_FILE_TYPE, "not a directory"); | |
401 | ||
402 | continue; | |
403 | } | |
404 | ||
405 | pos += sizeof (ino) + data->filename_size; | |
406 | } while (pos < GRUB_MINIX_INODE_SIZE (data)); | |
407 | ||
408 | grub_error (GRUB_ERR_FILE_NOT_FOUND, "file not found"); | |
409 | return grub_errno; | |
410 | } | |
411 | ||
412 | ||
413 | /* Mount the filesystem on the disk DISK. */ | |
414 | static struct grub_minix_data * | |
415 | grub_minix_mount (grub_disk_t disk) | |
416 | { | |
417 | struct grub_minix_data *data; | |
418 | ||
419 | data = grub_malloc (sizeof (struct grub_minix_data)); | |
420 | if (!data) | |
421 | return 0; | |
422 | ||
423 | /* Read the superblock. */ | |
424 | grub_disk_read (disk, GRUB_MINIX_SBLOCK, 0, | |
425 | sizeof (struct grub_minix_sblock),(char *) &data->sblock); | |
426 | ||
427 | if (grub_le_to_cpu16 (data->sblock.magic) == GRUB_MINIX_MAGIC) | |
428 | { | |
429 | data->version = 1; | |
430 | data->filename_size = 14; | |
431 | } | |
432 | else if (grub_le_to_cpu16 (data->sblock.magic) == GRUB_MINIX2_MAGIC) | |
433 | { | |
434 | data->version = 2; | |
435 | data->filename_size = 14; | |
436 | } | |
437 | else if (grub_le_to_cpu16 (data->sblock.magic) == GRUB_MINIX_MAGIC_30) | |
438 | { | |
439 | data->version = 1; | |
440 | data->filename_size = 30; | |
441 | } | |
442 | else if (grub_le_to_cpu16 (data->sblock.magic) == GRUB_MINIX2_MAGIC_30) | |
443 | { | |
444 | data->version = 2; | |
445 | data->filename_size = 30; | |
446 | } | |
447 | else | |
448 | { | |
449 | grub_free (data); | |
450 | grub_error (GRUB_ERR_BAD_FS, "not an minix filesystem"); | |
451 | return 0; | |
452 | } | |
453 | ||
454 | data->disk = disk; | |
455 | data->linknest = 0; | |
456 | ||
457 | return data; | |
458 | } | |
459 | \f | |
460 | static grub_err_t | |
461 | grub_minix_dir (grub_device_t device, const char *path, | |
462 | int (*hook) (const char *filename, int dir)) | |
463 | { | |
464 | struct grub_minix_data *data = 0; | |
465 | struct grub_minix_sblock *sblock; | |
466 | unsigned int pos = 0; | |
467 | ||
468 | data = grub_minix_mount (device->disk); | |
469 | if (!data) | |
470 | return grub_errno; | |
471 | ||
472 | grub_minix_read_inode (data, GRUB_MINIX_ROOT_INODE); | |
473 | if (grub_errno) | |
474 | goto fail; | |
475 | ||
476 | sblock = &data->sblock; | |
477 | ||
478 | grub_minix_find_file (data, path); | |
479 | if (grub_errno) | |
480 | goto fail; | |
481 | ||
482 | if ((GRUB_MINIX_INODE_MODE (data) & GRUB_MINIX_IFDIR) != GRUB_MINIX_IFDIR) | |
483 | { | |
484 | grub_error (GRUB_ERR_BAD_FILE_TYPE, "not a directory"); | |
485 | goto fail; | |
486 | } | |
487 | ||
488 | while (pos < GRUB_MINIX_INODE_SIZE (data)) | |
489 | { | |
490 | grub_uint16_t ino; | |
491 | char filename[data->filename_size + 1]; | |
492 | int dirino = data->ino; | |
493 | ||
494 | if (grub_minix_read_file (data, 0, pos, sizeof (ino), | |
495 | (char *) &ino) < 0) | |
496 | return grub_errno; | |
497 | ||
498 | if (grub_minix_read_file (data, 0, pos + sizeof (ino), | |
499 | data->filename_size, | |
500 | (char *) filename) < 0) | |
501 | return grub_errno; | |
502 | filename[data->filename_size] = '\0'; | |
503 | ||
504 | /* The filetype is not stored in the dirent. Read the inode to | |
505 | find out the filetype. This *REALLY* sucks. */ | |
506 | grub_minix_read_inode (data, grub_le_to_cpu16 (ino)); | |
507 | if (hook (filename, ((GRUB_MINIX_INODE_MODE (data) | |
508 | & GRUB_MINIX_IFDIR) == GRUB_MINIX_IFDIR)) ? 1 : 0) | |
509 | break; | |
510 | ||
511 | /* Load the old inode back in. */ | |
512 | grub_minix_read_inode (data, dirino); | |
513 | ||
514 | pos += sizeof (ino) + data->filename_size; | |
515 | } | |
516 | ||
517 | fail: | |
518 | grub_free (data); | |
519 | return grub_errno; | |
520 | } | |
521 | ||
522 | ||
523 | /* Open a file named NAME and initialize FILE. */ | |
524 | static grub_err_t | |
525 | grub_minix_open (struct grub_file *file, const char *name) | |
526 | { | |
527 | struct grub_minix_data *data; | |
528 | data = grub_minix_mount (file->device->disk); | |
529 | if (!data) | |
530 | return grub_errno; | |
531 | ||
532 | /* Open the inode op the root directory. */ | |
533 | grub_minix_read_inode (data, GRUB_MINIX_ROOT_INODE); | |
534 | if (grub_errno) | |
535 | { | |
536 | grub_free (data); | |
537 | return grub_errno; | |
538 | } | |
539 | ||
540 | if (!name || name[0] != '/') | |
541 | { | |
542 | grub_error (GRUB_ERR_BAD_FILENAME, "bad filename"); | |
543 | return grub_errno; | |
544 | } | |
545 | ||
546 | /* Traverse the directory tree to the node that should be | |
547 | opened. */ | |
548 | grub_minix_find_file (data, name); | |
549 | if (grub_errno) | |
550 | { | |
551 | grub_free (data); | |
552 | return grub_errno; | |
553 | } | |
554 | ||
555 | file->data = data; | |
556 | file->size = GRUB_MINIX_INODE_SIZE (data); | |
557 | ||
558 | return GRUB_ERR_NONE; | |
559 | } | |
560 | ||
561 | ||
562 | static grub_ssize_t | |
563 | grub_minix_read (grub_file_t file, char *buf, grub_ssize_t len) | |
564 | { | |
565 | struct grub_minix_data *data = | |
566 | (struct grub_minix_data *) file->data; | |
567 | ||
568 | return grub_minix_read_file (data, file->read_hook, file->offset, len, buf); | |
569 | } | |
570 | ||
571 | ||
572 | static grub_err_t | |
573 | grub_minix_close (grub_file_t file) | |
574 | { | |
575 | grub_free (file->data); | |
576 | ||
577 | return GRUB_ERR_NONE; | |
578 | } | |
579 | ||
580 | ||
581 | static grub_err_t | |
582 | grub_minix_label (grub_device_t device __attribute ((unused)), | |
583 | char **label __attribute ((unused))) | |
584 | { | |
585 | return GRUB_ERR_NONE; | |
586 | } | |
587 | ||
588 | \f | |
589 | static struct grub_fs grub_minix_fs = | |
590 | { | |
591 | .name = "minix", | |
592 | .dir = grub_minix_dir, | |
593 | .open = grub_minix_open, | |
594 | .read = grub_minix_read, | |
595 | .close = grub_minix_close, | |
596 | .label = grub_minix_label, | |
597 | .next = 0 | |
598 | }; | |
599 | ||
6d099807 | 600 | GRUB_MOD_INIT(minix) |
66e19ef8 | 601 | { |
602 | grub_fs_register (&grub_minix_fs); | |
6d099807 | 603 | #ifndef GRUB_UTIL |
66e19ef8 | 604 | my_mod = mod; |
6d099807 | 605 | #endif |
66e19ef8 | 606 | } |
607 | ||
6d099807 | 608 | GRUB_MOD_FINI(minix) |
66e19ef8 | 609 | { |
610 | grub_fs_unregister (&grub_minix_fs); | |
611 | } |