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Commit | Line | Data |
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2bd0ea18 | 1 | /* |
da23017d NS |
2 | * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
dfc130f3 | 4 | * |
da23017d NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
2bd0ea18 | 7 | * published by the Free Software Foundation. |
dfc130f3 | 8 | * |
da23017d NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
dfc130f3 | 13 | * |
da23017d NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
2bd0ea18 NS |
17 | */ |
18 | ||
1d7e80ee | 19 | #include <xfs/libxfs.h> |
2bd0ea18 NS |
20 | #include <ctype.h> |
21 | #include <time.h> | |
22 | #include "bit.h" | |
23 | #include "block.h" | |
24 | #include "command.h" | |
2bd0ea18 NS |
25 | #include "type.h" |
26 | #include "faddr.h" | |
27 | #include "fprint.h" | |
28 | #include "field.h" | |
29 | #include "flist.h" | |
30 | #include "io.h" | |
4ca431fc | 31 | #include "init.h" |
2bd0ea18 NS |
32 | #include "output.h" |
33 | #include "print.h" | |
34 | #include "write.h" | |
35 | #include "malloc.h" | |
36 | ||
37 | static int write_f(int argc, char **argv); | |
38 | static void write_help(void); | |
39 | ||
40 | static const cmdinfo_t write_cmd = | |
9ee7055c AM |
41 | { "write", NULL, write_f, 0, -1, 0, N_("[field or value]..."), |
42 | N_("write value to disk"), write_help }; | |
2bd0ea18 NS |
43 | |
44 | void | |
45 | write_init(void) | |
46 | { | |
4ca431fc | 47 | if (!expert_mode) |
2bd0ea18 NS |
48 | return; |
49 | ||
50 | add_command(&write_cmd); | |
51 | srand48(clock()); | |
52 | } | |
53 | ||
dfc130f3 | 54 | static void |
2bd0ea18 NS |
55 | write_help(void) |
56 | { | |
9ee7055c | 57 | dbprintf(_( |
2bd0ea18 NS |
58 | "\n" |
59 | " The 'write' command takes on different personalities depending on the\n" | |
60 | " type of object being worked with.\n\n" | |
61 | " Write has 3 modes:\n" | |
62 | " 'struct mode' - is active anytime you're looking at a filesystem object\n" | |
63 | " which contains individual fields (ex: an inode).\n" | |
64 | " 'data mode' - is active anytime you set a disk address directly or set\n" | |
65 | " the type to 'data'.\n" | |
66 | " 'string mode' - only used for writing symlink blocks.\n" | |
67 | "\n" | |
68 | " Examples:\n" | |
69 | " Struct mode: 'write core.uid 23' - set an inode uid field to 23.\n" | |
70 | " 'write fname \"hello\\000\"' - write superblock fname.\n" | |
71 | " (note: in struct mode strings are not null terminated)\n" | |
72 | " 'write fname #6669736800' - write superblock fname with hex.\n" | |
dfc130f3 | 73 | " 'write uuid 00112233-4455-6677-8899-aabbccddeeff'\n" |
2bd0ea18 NS |
74 | " - write superblock uuid.\n" |
75 | " Data mode: 'write fill 0xff' - fill the entire block with 0xff's\n" | |
76 | " 'write lshift 3' - shift the block 3 bytes to the left\n" | |
77 | " 'write sequence 1 5' - write a cycle of number [1-5] through\n" | |
78 | " the entire block.\n" | |
79 | " String mode: 'write \"This_is_a_filename\" - write null terminated string.\n" | |
80 | "\n" | |
81 | " In data mode type 'write' by itself for a list of specific commands.\n\n" | |
9ee7055c | 82 | )); |
2bd0ea18 NS |
83 | |
84 | } | |
85 | ||
86 | static int | |
87 | write_f( | |
88 | int argc, | |
89 | char **argv) | |
90 | { | |
91 | pfunc_t pf; | |
92 | extern char *progname; | |
93 | ||
4ca431fc | 94 | if (x.isreadonly & LIBXFS_ISREADONLY) { |
9ee7055c | 95 | dbprintf(_("%s started in read only mode, writing disabled\n"), |
2bd0ea18 NS |
96 | progname); |
97 | return 0; | |
98 | } | |
99 | ||
100 | if (cur_typ == NULL) { | |
9ee7055c | 101 | dbprintf(_("no current type\n")); |
2bd0ea18 NS |
102 | return 0; |
103 | } | |
104 | ||
105 | pf = cur_typ->pfunc; | |
106 | if (pf == NULL) { | |
9ee7055c | 107 | dbprintf(_("no handler function for type %s, write unsupported.\n"), |
2bd0ea18 NS |
108 | cur_typ->name); |
109 | return 0; | |
110 | } | |
111 | ||
112 | /* move past the "write" command */ | |
113 | argc--; | |
114 | argv++; | |
115 | ||
116 | (*pf)(DB_WRITE, cur_typ->fields, argc, argv); | |
117 | ||
118 | return 0; | |
119 | } | |
120 | ||
121 | /* compare significant portions of commands */ | |
122 | ||
123 | static int | |
124 | sigcmp( | |
125 | char *s1, | |
126 | char *s2, | |
127 | int sig) | |
128 | { | |
129 | int sigcnt; | |
130 | ||
131 | if (!s1 || !s2) | |
132 | return 0; | |
133 | ||
134 | for (sigcnt = 0; *s1 == *s2; s1++, s2++) { | |
135 | sigcnt++; | |
136 | if (*s1 == '\0') | |
137 | return 1; | |
138 | } | |
139 | if (*s1 && *s2) | |
140 | return 0; | |
141 | ||
142 | if (sig && (sigcnt >= sig)) | |
143 | return 1; | |
144 | ||
145 | return 0; | |
146 | } | |
147 | ||
148 | /* ARGSUSED */ | |
149 | static void | |
150 | bwrite_lshift( | |
151 | int start, | |
152 | int len, | |
153 | int shift, | |
154 | int from, | |
155 | int to) | |
156 | { | |
157 | char *base; | |
158 | ||
159 | if (shift == -1) | |
160 | shift = 1; | |
161 | if (start == -1) | |
162 | start = 0; | |
163 | if (len == -1) | |
164 | len = iocur_top->len - start; | |
165 | ||
166 | if (len+start > iocur_top->len) { | |
9ee7055c | 167 | dbprintf(_("length (%d) too large for data block size (%d)"), |
2bd0ea18 NS |
168 | len, iocur_top->len); |
169 | } | |
170 | ||
171 | base = (char *)iocur_top->data + start; | |
172 | ||
173 | memcpy(base, base+shift, len-shift); | |
174 | memset(base+(len-shift), 0, shift); | |
175 | } | |
176 | ||
177 | /* ARGSUSED */ | |
178 | static void | |
179 | bwrite_rshift( | |
180 | int start, | |
181 | int len, | |
182 | int shift, | |
183 | int from, | |
184 | int to) | |
185 | { | |
186 | char *base; | |
187 | ||
188 | if (shift == -1) | |
189 | shift = 1; | |
190 | if (start == -1) | |
191 | start = 0; | |
192 | if (len == -1) | |
193 | len = iocur_top->len - start; | |
194 | ||
195 | if (len+start > iocur_top->len) { | |
9ee7055c | 196 | dbprintf(_("length (%d) too large for data block size (%d)"), |
2bd0ea18 NS |
197 | len, iocur_top->len); |
198 | } | |
199 | ||
200 | base = (char *)iocur_top->data + start; | |
201 | ||
202 | memcpy(base+shift, base, len-shift); | |
203 | memset(base, 0, shift); | |
204 | } | |
205 | ||
206 | /* ARGSUSED */ | |
207 | static void | |
208 | bwrite_lrot( | |
209 | int start, | |
210 | int len, | |
211 | int shift, | |
212 | int from, | |
213 | int to) | |
214 | { | |
215 | char *base; | |
216 | char *hold_region; | |
217 | ||
218 | if (shift == -1) | |
219 | shift = 1; | |
220 | if (start == -1) | |
221 | start = 0; | |
222 | if (len == -1) | |
223 | len = iocur_top->len - start; | |
224 | ||
225 | if (len+start > iocur_top->len) { | |
9ee7055c | 226 | dbprintf(_("length (%d) too large for data block size (%d)"), |
2bd0ea18 NS |
227 | len, iocur_top->len); |
228 | } | |
229 | ||
230 | base = (char *)iocur_top->data + start; | |
231 | ||
232 | hold_region = xmalloc(shift); | |
233 | memcpy(hold_region, base, shift); | |
234 | memcpy(base, base+shift, len-shift); | |
235 | memcpy(base+(len-shift), hold_region, shift); | |
236 | } | |
237 | ||
238 | /* ARGSUSED */ | |
239 | static void | |
240 | bwrite_rrot( | |
241 | int start, | |
242 | int len, | |
243 | int shift, | |
244 | int from, | |
245 | int to) | |
246 | { | |
247 | char *base; | |
248 | char *hold_region; | |
249 | ||
250 | if (shift == -1) | |
251 | shift = 1; | |
252 | if (start == -1) | |
253 | start = 0; | |
254 | if (len == -1) | |
255 | len = iocur_top->len - start; | |
256 | ||
257 | if (len+start > iocur_top->len) { | |
9ee7055c | 258 | dbprintf(_("length (%d) too large for data block size (%d)"), |
2bd0ea18 NS |
259 | len, iocur_top->len); |
260 | } | |
261 | ||
262 | base = (char *)iocur_top->data + start; | |
263 | ||
264 | hold_region = xmalloc(shift); | |
265 | memcpy(hold_region, base+(len-shift), shift); | |
0e6b2a43 | 266 | memmove(base+shift, base, len-shift); |
2bd0ea18 NS |
267 | memcpy(base, hold_region, shift); |
268 | } | |
269 | ||
270 | /* ARGSUSED */ | |
271 | static void | |
272 | bwrite_seq( | |
273 | int start, | |
274 | int len, | |
275 | int step, | |
276 | int from, | |
277 | int to) | |
278 | { | |
279 | int i; | |
280 | int tmp; | |
281 | int base; | |
282 | int range; | |
283 | int top; | |
0e6b2a43 | 284 | char *buf; |
2bd0ea18 NS |
285 | |
286 | if (start == -1) | |
287 | start = 0; | |
288 | ||
289 | if (len == -1) | |
290 | len = iocur_top->len - start; | |
291 | ||
292 | if (len+start > iocur_top->len) { | |
9ee7055c | 293 | dbprintf(_("length (%d) too large for data block size (%d)"), |
2bd0ea18 NS |
294 | len, iocur_top->len); |
295 | } | |
296 | ||
297 | if (from == -1 || from > 255) | |
298 | from = 0; | |
299 | if (to == -1 || to > 255) | |
300 | to = 255; | |
301 | if (step == -1) | |
302 | step = 1; | |
303 | ||
304 | base = from; | |
305 | top = to; | |
306 | if (from > to) { | |
307 | base = to; | |
308 | top = from; | |
309 | if (step > 0) | |
310 | step = -step; | |
311 | } | |
312 | ||
313 | range = top - base; | |
0e6b2a43 | 314 | buf = (char *)iocur_top->data + start; |
2bd0ea18 NS |
315 | |
316 | tmp = 0; | |
317 | for (i = start; i < start+len; i++) { | |
318 | *buf++ = tmp + base; | |
319 | tmp = (tmp + step)%(range+1); | |
320 | } | |
321 | } | |
322 | ||
323 | /* ARGSUSED */ | |
324 | static void | |
325 | bwrite_random( | |
326 | int start, | |
327 | int len, | |
328 | int shift, | |
329 | int from, | |
330 | int to) | |
331 | { | |
332 | int i; | |
0e6b2a43 | 333 | char *buf; |
2bd0ea18 NS |
334 | |
335 | if (start == -1) | |
336 | start = 0; | |
337 | ||
338 | if (len == -1) | |
339 | len = iocur_top->len - start; | |
340 | ||
341 | if (len+start > iocur_top->len) { | |
9ee7055c | 342 | dbprintf(_("length (%d) too large for data block size (%d)"), |
2bd0ea18 NS |
343 | len, iocur_top->len); |
344 | } | |
345 | ||
0e6b2a43 NS |
346 | buf = (char *)iocur_top->data + start; |
347 | ||
2bd0ea18 NS |
348 | for (i = start; i < start+len; i++) |
349 | *buf++ = (char)lrand48(); | |
350 | } | |
351 | ||
352 | /* ARGSUSED */ | |
353 | static void | |
354 | bwrite_fill( | |
355 | int start, | |
356 | int len, | |
357 | int value, | |
358 | int from, | |
359 | int to) | |
360 | { | |
361 | char *base; | |
362 | ||
363 | if (value == -1) | |
364 | value = 0; | |
365 | if (start == -1) | |
366 | start = 0; | |
367 | if (len == -1) | |
368 | len = iocur_top->len - start; | |
369 | ||
370 | if (len+start > iocur_top->len) { | |
9ee7055c | 371 | dbprintf(_("length (%d) too large for data block size (%d)"), |
2bd0ea18 NS |
372 | len, iocur_top->len); |
373 | } | |
374 | ||
375 | base = (char *)iocur_top->data + start; | |
376 | ||
377 | memset(base, value, len); | |
378 | } | |
379 | ||
380 | static struct bw_cmd { | |
381 | void (*cmdfunc)(int,int,int,int,int); | |
382 | char *cmdstr; | |
383 | int sig_chars; | |
384 | int argmin; | |
385 | int argmax; | |
386 | int shiftcount_arg; | |
387 | int from_arg; | |
388 | int to_arg; | |
389 | int start_arg; | |
390 | int len_arg; | |
391 | char *usage; | |
392 | } bw_cmdtab[] = { | |
393 | /* cmd sig min max sh frm to start len */ | |
394 | { bwrite_lshift, "lshift", 2, 0, 3, 1, 0, 0, 2, 3, | |
395 | "[shiftcount] [start] [len]", }, | |
396 | { bwrite_rshift, "rshift", 2, 0, 3, 1, 0, 0, 2, 3, | |
397 | "[shiftcount] [start] [len]", }, | |
398 | { bwrite_lrot, "lrot", 2, 0, 3, 1, 0, 0, 2, 3, | |
399 | "[shiftcount] [start] [len]", }, | |
400 | { bwrite_rrot, "rrot", 2, 0, 3, 1, 0, 0, 2, 3, | |
401 | "[shiftcount] [start] [len]", }, | |
402 | { bwrite_seq, "sequence", 3, 0, 4, 0, 1, 2, 3, 4, | |
403 | "[from] [to] [start] [len]", }, | |
404 | { bwrite_random, "random", 3, 0, 2, 0, 0, 0, 1, 2, | |
405 | "[start] [len]", }, | |
406 | { bwrite_fill, "fill", 1, 1, 3, 1, 0, 0, 2, 3, | |
407 | "num [start] [len]" } | |
408 | }; | |
409 | ||
410 | #define BWRITE_CMD_MAX (sizeof(bw_cmdtab)/sizeof(bw_cmdtab[0])) | |
411 | ||
412 | static int | |
413 | convert_oct( | |
414 | char *arg, | |
415 | int *ret) | |
416 | { | |
417 | int count; | |
418 | int i; | |
419 | int val = 0; | |
420 | ||
421 | /* only allow 1 case, '\' and 3 octal digits (or less) */ | |
422 | ||
423 | for (count = 0; count < 3; count++) { | |
424 | if (arg[count] == '\0') | |
425 | break; | |
426 | ||
427 | if ((arg[count] < '0') && (arg[count] > '7')) | |
428 | break; | |
429 | } | |
430 | ||
431 | for (i = 0; i < count; i++) { | |
432 | val |= ((arg[(count-1)-i]-'0')&0x07)<<(i*3); | |
433 | } | |
434 | ||
435 | *ret = val&0xff; | |
436 | ||
437 | return(count); | |
438 | } | |
439 | ||
440 | #define NYBBLE(x) (isdigit(x)?(x-'0'):(tolower(x)-'a'+0xa)) | |
441 | ||
442 | static char * | |
443 | convert_arg( | |
444 | char *arg, | |
445 | int bit_length) | |
446 | { | |
447 | int i; | |
448 | static char *buf = NULL; | |
449 | char *rbuf; | |
450 | long long *value; | |
451 | int alloc_size; | |
452 | char *ostr; | |
453 | int octval, ret; | |
454 | ||
455 | if (bit_length <= 64) | |
456 | alloc_size = 8; | |
457 | else | |
458 | alloc_size = (bit_length+7)/8; | |
459 | ||
460 | buf = xrealloc(buf, alloc_size); | |
461 | memset(buf, 0, alloc_size); | |
462 | value = (long long *)buf; | |
463 | rbuf = buf; | |
464 | ||
465 | if (*arg == '\"') { | |
dfc130f3 | 466 | /* handle strings */ |
2bd0ea18 NS |
467 | |
468 | /* zap closing quote if there is one */ | |
469 | if ((ostr = strrchr(arg+1, '\"')) != NULL) | |
470 | *ostr = '\0'; | |
471 | ||
472 | ostr = arg+1; | |
473 | for (i = 0; i < alloc_size; i++) { | |
474 | if (!*ostr) | |
475 | break; | |
476 | ||
477 | /* do octal */ | |
478 | if (*ostr == '\\') { | |
479 | if (*(ostr+1) >= '0' || *(ostr+1) <= '7') { | |
480 | ret = convert_oct(ostr+1, &octval); | |
481 | *rbuf++ = octval; | |
482 | ostr += ret+1; | |
483 | continue; | |
484 | } | |
485 | } | |
486 | *rbuf++ = *ostr++; | |
487 | } | |
488 | ||
489 | return buf; | |
dfc130f3 RC |
490 | } else if (arg[0] == '#' || ((arg[0] != '-') && strchr(arg,'-'))) { |
491 | /* | |
492 | * handle hex blocks ie | |
493 | * #00112233445566778899aabbccddeeff | |
494 | * and uuids ie | |
495 | * 1122334455667788-99aa-bbcc-ddee-ff00112233445566778899 | |
75efd6ca ES |
496 | * |
497 | * (but if it starts with "-" assume it's just an integer) | |
dfc130f3 RC |
498 | */ |
499 | int bytes=bit_length/8; | |
500 | ||
501 | /* skip leading hash */ | |
502 | if (*arg=='#') arg++; | |
503 | ||
504 | while (*arg && bytes--) { | |
505 | /* skip hypens */ | |
506 | while (*arg=='-') arg++; | |
507 | ||
508 | /* get first nybble */ | |
509 | if (!isxdigit((int)*arg)) return NULL; | |
510 | *rbuf=NYBBLE((int)*arg)<<4; | |
511 | arg++; | |
512 | ||
513 | /* skip more hyphens */ | |
514 | while (*arg=='-') arg++; | |
515 | ||
516 | /* get second nybble */ | |
517 | if (!isxdigit((int)*arg)) return NULL; | |
518 | *rbuf++|=NYBBLE((int)*arg); | |
519 | arg++; | |
520 | } | |
521 | if (bytes<0&&*arg) return NULL; | |
522 | return buf; | |
2bd0ea18 | 523 | } else { |
dfc130f3 RC |
524 | /* |
525 | * handle integers | |
526 | */ | |
2bd0ea18 | 527 | *value = strtoll(arg, NULL, 0); |
dfc130f3 | 528 | |
2bd0ea18 NS |
529 | #if __BYTE_ORDER == BIG_ENDIAN |
530 | /* hackery for big endian */ | |
531 | if (bit_length <= 8) { | |
532 | rbuf += 7; | |
533 | } else if (bit_length <= 16) { | |
534 | rbuf += 6; | |
535 | } else if (bit_length <= 32) { | |
536 | rbuf += 4; | |
537 | } | |
538 | #endif | |
539 | return rbuf; | |
540 | } | |
541 | } | |
542 | ||
543 | ||
544 | /* ARGSUSED */ | |
545 | void | |
546 | write_struct( | |
547 | const field_t *fields, | |
548 | int argc, | |
549 | char **argv) | |
550 | { | |
551 | const ftattr_t *fa; | |
552 | flist_t *fl; | |
553 | flist_t *sfl; | |
554 | int bit_length; | |
555 | char *buf; | |
556 | int parentoffset; | |
557 | ||
558 | if (argc != 2) { | |
9ee7055c | 559 | dbprintf(_("usage: write fieldname value\n")); |
2bd0ea18 NS |
560 | return; |
561 | } | |
562 | ||
563 | fl = flist_scan(argv[0]); | |
564 | if (!fl) { | |
9ee7055c | 565 | dbprintf(_("unable to parse '%s'.\n"), argv[0]); |
2bd0ea18 NS |
566 | return; |
567 | } | |
568 | ||
569 | /* if we're a root field type, go down 1 layer to get field list */ | |
570 | if (fields->name[0] == '\0') { | |
571 | fa = &ftattrtab[fields->ftyp]; | |
572 | ASSERT(fa->ftyp == fields->ftyp); | |
573 | fields = fa->subfld; | |
574 | } | |
575 | ||
576 | /* run down the field list and set offsets into the data */ | |
577 | if (!flist_parse(fields, fl, iocur_top->data, 0)) { | |
578 | flist_free(fl); | |
9ee7055c | 579 | dbprintf(_("parsing error\n")); |
2bd0ea18 NS |
580 | return; |
581 | } | |
582 | ||
583 | sfl = fl; | |
584 | parentoffset = 0; | |
585 | while (sfl->child) { | |
586 | parentoffset = sfl->offset; | |
587 | sfl = sfl->child; | |
588 | } | |
589 | ||
590 | bit_length = fsize(sfl->fld, iocur_top->data, parentoffset, 0); | |
591 | bit_length *= fcount(sfl->fld, iocur_top->data, parentoffset); | |
592 | ||
593 | /* convert this to a generic conversion routine */ | |
594 | /* should be able to handle str, num, or even labels */ | |
dfc130f3 | 595 | |
2bd0ea18 NS |
596 | buf = convert_arg(argv[1], bit_length); |
597 | if (!buf) { | |
9ee7055c | 598 | dbprintf(_("unable to convert value '%s'.\n"), argv[1]); |
2bd0ea18 NS |
599 | return; |
600 | } | |
601 | ||
dfc130f3 | 602 | setbitval(iocur_top->data, sfl->offset, bit_length, buf); |
2bd0ea18 NS |
603 | write_cur(); |
604 | ||
605 | flist_print(fl); | |
dfc130f3 | 606 | print_flist(fl); |
2bd0ea18 NS |
607 | flist_free(fl); |
608 | } | |
609 | ||
610 | /* ARGSUSED */ | |
611 | void | |
612 | write_string( | |
613 | const field_t *fields, | |
614 | int argc, | |
615 | char **argv) | |
616 | { | |
617 | char *buf; | |
618 | int i; | |
619 | ||
620 | if (argc != 1) { | |
9ee7055c | 621 | dbprintf(_("usage (in string mode): write \"string...\"\n")); |
2bd0ea18 NS |
622 | return; |
623 | } | |
624 | ||
625 | buf = convert_arg(argv[0], (int)((strlen(argv[0])+1)*8)); | |
626 | for (i = 0; i < iocur_top->len; i++) { | |
627 | ((char *)iocur_top->data)[i] = *buf; | |
628 | if (*buf++ == '\0') | |
629 | break; | |
630 | } | |
631 | ||
632 | /* write back to disk */ | |
633 | write_cur(); | |
634 | } | |
635 | ||
636 | /* ARGSUSED */ | |
637 | void | |
638 | write_block( | |
639 | const field_t *fields, | |
640 | int argc, | |
641 | char **argv) | |
642 | { | |
643 | int i; | |
dfc130f3 | 644 | int shiftcount = -1; |
2bd0ea18 NS |
645 | int start = -1; |
646 | int len = -1; | |
647 | int from = -1; | |
648 | int to = -1; | |
649 | struct bw_cmd *cmd = NULL; | |
650 | ||
651 | if (argc <= 1 || argc > 5) | |
652 | goto block_usage; | |
653 | ||
654 | for (i = 0; i < BWRITE_CMD_MAX; i++) { | |
655 | if (sigcmp(argv[0], bw_cmdtab[i].cmdstr, | |
656 | bw_cmdtab[i].sig_chars)) { | |
657 | cmd = &bw_cmdtab[i]; | |
658 | break; | |
659 | } | |
660 | } | |
661 | ||
662 | if (!cmd) { | |
9ee7055c | 663 | dbprintf(_("write: invalid subcommand\n")); |
2bd0ea18 NS |
664 | goto block_usage; |
665 | } | |
666 | ||
667 | if ((argc < cmd->argmin + 1) || (argc > cmd->argmax + 1)) { | |
9ee7055c | 668 | dbprintf(_("write %s: invalid number of arguments\n"), |
2bd0ea18 NS |
669 | cmd->cmdstr); |
670 | goto block_usage; | |
671 | } | |
dfc130f3 | 672 | |
2bd0ea18 NS |
673 | if (cmd->shiftcount_arg && (cmd->shiftcount_arg < argc)) |
674 | shiftcount = (int)strtoul(argv[cmd->shiftcount_arg], NULL, 0); | |
675 | if (cmd->start_arg && (cmd->start_arg < argc)) | |
676 | start = (int)strtoul(argv[cmd->start_arg], NULL, 0); | |
677 | if (cmd->len_arg && (cmd->len_arg < argc)) | |
678 | len = (int)strtoul(argv[cmd->len_arg], NULL, 0); | |
679 | if (cmd->from_arg && (cmd->len_arg < argc)) | |
680 | from = (int)strtoul(argv[cmd->from_arg], NULL, 0); | |
681 | if (cmd->to_arg && (cmd->len_arg < argc)) | |
682 | to = (int)strtoul(argv[cmd->to_arg], NULL, 0); | |
683 | ||
684 | cmd->cmdfunc(start, len, shiftcount, from, to); | |
685 | ||
686 | /* write back to disk */ | |
687 | write_cur(); | |
688 | return; | |
689 | ||
690 | block_usage: | |
691 | ||
9ee7055c | 692 | dbprintf(_("usage: write (in data mode)\n")); |
2bd0ea18 NS |
693 | for (i = 0; i < BWRITE_CMD_MAX; i++) { |
694 | dbprintf(" %-9.9s %s\n", | |
695 | bw_cmdtab[i].cmdstr, bw_cmdtab[i].usage); | |
696 | } | |
697 | dbprintf("\n"); | |
698 | return; | |
699 | } |