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Source at commit b05a5adf03613de371c77c3235f7d970d7cd0c71 created 13 years 1 month ago. By Lars-Peter Clausen, NAND: Optimize reading the eec data for the JZ4740 (evil hack) | |
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1 | #include <stdio.h> |
2 | #include <stdlib.h> |
3 | #include <sys/types.h> |
4 | #include <sys/stat.h> |
5 | #include <string.h> |
6 | #include <unistd.h> |
7 | #include <time.h> |
8 | #include <fcntl.h> |
9 | #include <errno.h> |
10 | #include <ctype.h> |
11 | #include <limits.h> |
12 | |
13 | /* |
14 | * Original work by Jeff Garzik |
15 | * |
16 | * External file lists, symlink, pipe and fifo support by Thayne Harbaugh |
17 | * Hard link support by Luciano Rocha |
18 | */ |
19 | |
20 | #define xstr(s) #s |
21 | #define str(s) xstr(s) |
22 | |
23 | static unsigned int offset; |
24 | static unsigned int ino = 721; |
25 | |
26 | struct file_handler { |
27 | const char *type; |
28 | int (*handler)(const char *line); |
29 | }; |
30 | |
31 | static void push_string(const char *name) |
32 | { |
33 | unsigned int name_len = strlen(name) + 1; |
34 | |
35 | fputs(name, stdout); |
36 | putchar(0); |
37 | offset += name_len; |
38 | } |
39 | |
40 | static void push_pad (void) |
41 | { |
42 | while (offset & 3) { |
43 | putchar(0); |
44 | offset++; |
45 | } |
46 | } |
47 | |
48 | static void push_rest(const char *name) |
49 | { |
50 | unsigned int name_len = strlen(name) + 1; |
51 | unsigned int tmp_ofs; |
52 | |
53 | fputs(name, stdout); |
54 | putchar(0); |
55 | offset += name_len; |
56 | |
57 | tmp_ofs = name_len + 110; |
58 | while (tmp_ofs & 3) { |
59 | putchar(0); |
60 | offset++; |
61 | tmp_ofs++; |
62 | } |
63 | } |
64 | |
65 | static void push_hdr(const char *s) |
66 | { |
67 | fputs(s, stdout); |
68 | offset += 110; |
69 | } |
70 | |
71 | static void cpio_trailer(void) |
72 | { |
73 | char s[256]; |
74 | const char name[] = "TRAILER!!!"; |
75 | |
76 | sprintf(s, "%s%08X%08X%08lX%08lX%08X%08lX" |
77 | "%08X%08X%08X%08X%08X%08X%08X", |
78 | "070701", /* magic */ |
79 | 0, /* ino */ |
80 | 0, /* mode */ |
81 | (long) 0, /* uid */ |
82 | (long) 0, /* gid */ |
83 | 1, /* nlink */ |
84 | (long) 0, /* mtime */ |
85 | 0, /* filesize */ |
86 | 0, /* major */ |
87 | 0, /* minor */ |
88 | 0, /* rmajor */ |
89 | 0, /* rminor */ |
90 | (unsigned)strlen(name)+1, /* namesize */ |
91 | 0); /* chksum */ |
92 | push_hdr(s); |
93 | push_rest(name); |
94 | |
95 | while (offset % 512) { |
96 | putchar(0); |
97 | offset++; |
98 | } |
99 | } |
100 | |
101 | static int cpio_mkslink(const char *name, const char *target, |
102 | unsigned int mode, uid_t uid, gid_t gid) |
103 | { |
104 | char s[256]; |
105 | time_t mtime = time(NULL); |
106 | |
107 | if (name[0] == '/') |
108 | name++; |
109 | sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX" |
110 | "%08X%08X%08X%08X%08X%08X%08X", |
111 | "070701", /* magic */ |
112 | ino++, /* ino */ |
113 | S_IFLNK | mode, /* mode */ |
114 | (long) uid, /* uid */ |
115 | (long) gid, /* gid */ |
116 | 1, /* nlink */ |
117 | (long) mtime, /* mtime */ |
118 | (unsigned)strlen(target)+1, /* filesize */ |
119 | 3, /* major */ |
120 | 1, /* minor */ |
121 | 0, /* rmajor */ |
122 | 0, /* rminor */ |
123 | (unsigned)strlen(name) + 1,/* namesize */ |
124 | 0); /* chksum */ |
125 | push_hdr(s); |
126 | push_string(name); |
127 | push_pad(); |
128 | push_string(target); |
129 | push_pad(); |
130 | return 0; |
131 | } |
132 | |
133 | static int cpio_mkslink_line(const char *line) |
134 | { |
135 | char name[PATH_MAX + 1]; |
136 | char target[PATH_MAX + 1]; |
137 | unsigned int mode; |
138 | int uid; |
139 | int gid; |
140 | int rc = -1; |
141 | |
142 | if (5 != sscanf(line, "%" str(PATH_MAX) "s %" str(PATH_MAX) "s %o %d %d", name, target, &mode, &uid, &gid)) { |
143 | fprintf(stderr, "Unrecognized dir format '%s'", line); |
144 | goto fail; |
145 | } |
146 | rc = cpio_mkslink(name, target, mode, uid, gid); |
147 | fail: |
148 | return rc; |
149 | } |
150 | |
151 | static int cpio_mkgeneric(const char *name, unsigned int mode, |
152 | uid_t uid, gid_t gid) |
153 | { |
154 | char s[256]; |
155 | time_t mtime = time(NULL); |
156 | |
157 | if (name[0] == '/') |
158 | name++; |
159 | sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX" |
160 | "%08X%08X%08X%08X%08X%08X%08X", |
161 | "070701", /* magic */ |
162 | ino++, /* ino */ |
163 | mode, /* mode */ |
164 | (long) uid, /* uid */ |
165 | (long) gid, /* gid */ |
166 | 2, /* nlink */ |
167 | (long) mtime, /* mtime */ |
168 | 0, /* filesize */ |
169 | 3, /* major */ |
170 | 1, /* minor */ |
171 | 0, /* rmajor */ |
172 | 0, /* rminor */ |
173 | (unsigned)strlen(name) + 1,/* namesize */ |
174 | 0); /* chksum */ |
175 | push_hdr(s); |
176 | push_rest(name); |
177 | return 0; |
178 | } |
179 | |
180 | enum generic_types { |
181 | GT_DIR, |
182 | GT_PIPE, |
183 | GT_SOCK |
184 | }; |
185 | |
186 | struct generic_type { |
187 | const char *type; |
188 | mode_t mode; |
189 | }; |
190 | |
191 | static struct generic_type generic_type_table[] = { |
192 | [GT_DIR] = { |
193 | .type = "dir", |
194 | .mode = S_IFDIR |
195 | }, |
196 | [GT_PIPE] = { |
197 | .type = "pipe", |
198 | .mode = S_IFIFO |
199 | }, |
200 | [GT_SOCK] = { |
201 | .type = "sock", |
202 | .mode = S_IFSOCK |
203 | } |
204 | }; |
205 | |
206 | static int cpio_mkgeneric_line(const char *line, enum generic_types gt) |
207 | { |
208 | char name[PATH_MAX + 1]; |
209 | unsigned int mode; |
210 | int uid; |
211 | int gid; |
212 | int rc = -1; |
213 | |
214 | if (4 != sscanf(line, "%" str(PATH_MAX) "s %o %d %d", name, &mode, &uid, &gid)) { |
215 | fprintf(stderr, "Unrecognized %s format '%s'", |
216 | line, generic_type_table[gt].type); |
217 | goto fail; |
218 | } |
219 | mode |= generic_type_table[gt].mode; |
220 | rc = cpio_mkgeneric(name, mode, uid, gid); |
221 | fail: |
222 | return rc; |
223 | } |
224 | |
225 | static int cpio_mkdir_line(const char *line) |
226 | { |
227 | return cpio_mkgeneric_line(line, GT_DIR); |
228 | } |
229 | |
230 | static int cpio_mkpipe_line(const char *line) |
231 | { |
232 | return cpio_mkgeneric_line(line, GT_PIPE); |
233 | } |
234 | |
235 | static int cpio_mksock_line(const char *line) |
236 | { |
237 | return cpio_mkgeneric_line(line, GT_SOCK); |
238 | } |
239 | |
240 | static int cpio_mknod(const char *name, unsigned int mode, |
241 | uid_t uid, gid_t gid, char dev_type, |
242 | unsigned int maj, unsigned int min) |
243 | { |
244 | char s[256]; |
245 | time_t mtime = time(NULL); |
246 | |
247 | if (dev_type == 'b') |
248 | mode |= S_IFBLK; |
249 | else |
250 | mode |= S_IFCHR; |
251 | |
252 | if (name[0] == '/') |
253 | name++; |
254 | sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX" |
255 | "%08X%08X%08X%08X%08X%08X%08X", |
256 | "070701", /* magic */ |
257 | ino++, /* ino */ |
258 | mode, /* mode */ |
259 | (long) uid, /* uid */ |
260 | (long) gid, /* gid */ |
261 | 1, /* nlink */ |
262 | (long) mtime, /* mtime */ |
263 | 0, /* filesize */ |
264 | 3, /* major */ |
265 | 1, /* minor */ |
266 | maj, /* rmajor */ |
267 | min, /* rminor */ |
268 | (unsigned)strlen(name) + 1,/* namesize */ |
269 | 0); /* chksum */ |
270 | push_hdr(s); |
271 | push_rest(name); |
272 | return 0; |
273 | } |
274 | |
275 | static int cpio_mknod_line(const char *line) |
276 | { |
277 | char name[PATH_MAX + 1]; |
278 | unsigned int mode; |
279 | int uid; |
280 | int gid; |
281 | char dev_type; |
282 | unsigned int maj; |
283 | unsigned int min; |
284 | int rc = -1; |
285 | |
286 | if (7 != sscanf(line, "%" str(PATH_MAX) "s %o %d %d %c %u %u", |
287 | name, &mode, &uid, &gid, &dev_type, &maj, &min)) { |
288 | fprintf(stderr, "Unrecognized nod format '%s'", line); |
289 | goto fail; |
290 | } |
291 | rc = cpio_mknod(name, mode, uid, gid, dev_type, maj, min); |
292 | fail: |
293 | return rc; |
294 | } |
295 | |
296 | static int cpio_mkfile(const char *name, const char *location, |
297 | unsigned int mode, uid_t uid, gid_t gid, |
298 | unsigned int nlinks) |
299 | { |
300 | char s[256]; |
301 | char *filebuf = NULL; |
302 | struct stat buf; |
303 | long size; |
304 | int file = -1; |
305 | int retval; |
306 | int rc = -1; |
307 | int namesize; |
308 | int i; |
309 | |
310 | mode |= S_IFREG; |
311 | |
312 | file = open (location, O_RDONLY); |
313 | if (file < 0) { |
314 | fprintf (stderr, "File %s could not be opened for reading\n", location); |
315 | goto error; |
316 | } |
317 | |
318 | retval = fstat(file, &buf); |
319 | if (retval) { |
320 | fprintf(stderr, "File %s could not be stat()'ed\n", location); |
321 | goto error; |
322 | } |
323 | |
324 | filebuf = malloc(buf.st_size); |
325 | if (!filebuf) { |
326 | fprintf (stderr, "out of memory\n"); |
327 | goto error; |
328 | } |
329 | |
330 | retval = read (file, filebuf, buf.st_size); |
331 | if (retval < 0) { |
332 | fprintf (stderr, "Can not read %s file\n", location); |
333 | goto error; |
334 | } |
335 | |
336 | size = 0; |
337 | for (i = 1; i <= nlinks; i++) { |
338 | /* data goes on last link */ |
339 | if (i == nlinks) size = buf.st_size; |
340 | |
341 | if (name[0] == '/') |
342 | name++; |
343 | namesize = strlen(name) + 1; |
344 | sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX" |
345 | "%08lX%08X%08X%08X%08X%08X%08X", |
346 | "070701", /* magic */ |
347 | ino, /* ino */ |
348 | mode, /* mode */ |
349 | (long) uid, /* uid */ |
350 | (long) gid, /* gid */ |
351 | nlinks, /* nlink */ |
352 | (long) buf.st_mtime, /* mtime */ |
353 | size, /* filesize */ |
354 | 3, /* major */ |
355 | 1, /* minor */ |
356 | 0, /* rmajor */ |
357 | 0, /* rminor */ |
358 | namesize, /* namesize */ |
359 | 0); /* chksum */ |
360 | push_hdr(s); |
361 | push_string(name); |
362 | push_pad(); |
363 | |
364 | if (size) { |
365 | if (fwrite(filebuf, size, 1, stdout) != 1) { |
366 | fprintf(stderr, "writing filebuf failed\n"); |
367 | goto error; |
368 | } |
369 | offset += size; |
370 | push_pad(); |
371 | } |
372 | |
373 | name += namesize; |
374 | } |
375 | ino++; |
376 | rc = 0; |
377 | |
378 | error: |
379 | if (filebuf) free(filebuf); |
380 | if (file >= 0) close(file); |
381 | return rc; |
382 | } |
383 | |
384 | static char *cpio_replace_env(char *new_location) |
385 | { |
386 | char expanded[PATH_MAX + 1]; |
387 | char env_var[PATH_MAX + 1]; |
388 | char *start; |
389 | char *end; |
390 | |
391 | for (start = NULL; (start = strstr(new_location, "${")); ) { |
392 | end = strchr(start, '}'); |
393 | if (start < end) { |
394 | *env_var = *expanded = '\0'; |
395 | strncat(env_var, start + 2, end - start - 2); |
396 | strncat(expanded, new_location, start - new_location); |
397 | strncat(expanded, getenv(env_var), PATH_MAX); |
398 | strncat(expanded, end + 1, PATH_MAX); |
399 | strncpy(new_location, expanded, PATH_MAX); |
400 | } else |
401 | break; |
402 | } |
403 | |
404 | return new_location; |
405 | } |
406 | |
407 | |
408 | static int cpio_mkfile_line(const char *line) |
409 | { |
410 | char name[PATH_MAX + 1]; |
411 | char *dname = NULL; /* malloc'ed buffer for hard links */ |
412 | char location[PATH_MAX + 1]; |
413 | unsigned int mode; |
414 | int uid; |
415 | int gid; |
416 | int nlinks = 1; |
417 | int end = 0, dname_len = 0; |
418 | int rc = -1; |
419 | |
420 | if (5 > sscanf(line, "%" str(PATH_MAX) "s %" str(PATH_MAX) |
421 | "s %o %d %d %n", |
422 | name, location, &mode, &uid, &gid, &end)) { |
423 | fprintf(stderr, "Unrecognized file format '%s'", line); |
424 | goto fail; |
425 | } |
426 | if (end && isgraph(line[end])) { |
427 | int len; |
428 | int nend; |
429 | |
430 | dname = malloc(strlen(line)); |
431 | if (!dname) { |
432 | fprintf (stderr, "out of memory (%d)\n", dname_len); |
433 | goto fail; |
434 | } |
435 | |
436 | dname_len = strlen(name) + 1; |
437 | memcpy(dname, name, dname_len); |
438 | |
439 | do { |
440 | nend = 0; |
441 | if (sscanf(line + end, "%" str(PATH_MAX) "s %n", |
442 | name, &nend) < 1) |
443 | break; |
444 | len = strlen(name) + 1; |
445 | memcpy(dname + dname_len, name, len); |
446 | dname_len += len; |
447 | nlinks++; |
448 | end += nend; |
449 | } while (isgraph(line[end])); |
450 | } else { |
451 | dname = name; |
452 | } |
453 | rc = cpio_mkfile(dname, cpio_replace_env(location), |
454 | mode, uid, gid, nlinks); |
455 | fail: |
456 | if (dname_len) free(dname); |
457 | return rc; |
458 | } |
459 | |
460 | static void usage(const char *prog) |
461 | { |
462 | fprintf(stderr, "Usage:\n" |
463 | "\t%s <cpio_list>\n" |
464 | "\n" |
465 | "<cpio_list> is a file containing newline separated entries that\n" |
466 | "describe the files to be included in the initramfs archive:\n" |
467 | "\n" |
468 | "# a comment\n" |
469 | "file <name> <location> <mode> <uid> <gid> [<hard links>]\n" |
470 | "dir <name> <mode> <uid> <gid>\n" |
471 | "nod <name> <mode> <uid> <gid> <dev_type> <maj> <min>\n" |
472 | "slink <name> <target> <mode> <uid> <gid>\n" |
473 | "pipe <name> <mode> <uid> <gid>\n" |
474 | "sock <name> <mode> <uid> <gid>\n" |
475 | "\n" |
476 | "<name> name of the file/dir/nod/etc in the archive\n" |
477 | "<location> location of the file in the current filesystem\n" |
478 | " expands shell variables quoted with ${}\n" |
479 | "<target> link target\n" |
480 | "<mode> mode/permissions of the file\n" |
481 | "<uid> user id (0=root)\n" |
482 | "<gid> group id (0=root)\n" |
483 | "<dev_type> device type (b=block, c=character)\n" |
484 | "<maj> major number of nod\n" |
485 | "<min> minor number of nod\n" |
486 | "<hard links> space separated list of other links to file\n" |
487 | "\n" |
488 | "example:\n" |
489 | "# A simple initramfs\n" |
490 | "dir /dev 0755 0 0\n" |
491 | "nod /dev/console 0600 0 0 c 5 1\n" |
492 | "dir /root 0700 0 0\n" |
493 | "dir /sbin 0755 0 0\n" |
494 | "file /sbin/kinit /usr/src/klibc/kinit/kinit 0755 0 0\n", |
495 | prog); |
496 | } |
497 | |
498 | struct file_handler file_handler_table[] = { |
499 | { |
500 | .type = "file", |
501 | .handler = cpio_mkfile_line, |
502 | }, { |
503 | .type = "nod", |
504 | .handler = cpio_mknod_line, |
505 | }, { |
506 | .type = "dir", |
507 | .handler = cpio_mkdir_line, |
508 | }, { |
509 | .type = "slink", |
510 | .handler = cpio_mkslink_line, |
511 | }, { |
512 | .type = "pipe", |
513 | .handler = cpio_mkpipe_line, |
514 | }, { |
515 | .type = "sock", |
516 | .handler = cpio_mksock_line, |
517 | }, { |
518 | .type = NULL, |
519 | .handler = NULL, |
520 | } |
521 | }; |
522 | |
523 | #define LINE_SIZE (2 * PATH_MAX + 50) |
524 | |
525 | int main (int argc, char *argv[]) |
526 | { |
527 | FILE *cpio_list; |
528 | char line[LINE_SIZE]; |
529 | char *args, *type; |
530 | int ec = 0; |
531 | int line_nr = 0; |
532 | |
533 | if (2 != argc) { |
534 | usage(argv[0]); |
535 | exit(1); |
536 | } |
537 | |
538 | if (!strcmp(argv[1], "-")) |
539 | cpio_list = stdin; |
540 | else if (! (cpio_list = fopen(argv[1], "r"))) { |
541 | fprintf(stderr, "ERROR: unable to open '%s': %s\n\n", |
542 | argv[1], strerror(errno)); |
543 | usage(argv[0]); |
544 | exit(1); |
545 | } |
546 | |
547 | while (fgets(line, LINE_SIZE, cpio_list)) { |
548 | int type_idx; |
549 | size_t slen = strlen(line); |
550 | |
551 | line_nr++; |
552 | |
553 | if ('#' == *line) { |
554 | /* comment - skip to next line */ |
555 | continue; |
556 | } |
557 | |
558 | if (! (type = strtok(line, " \t"))) { |
559 | fprintf(stderr, |
560 | "ERROR: incorrect format, could not locate file type line %d: '%s'\n", |
561 | line_nr, line); |
562 | ec = -1; |
563 | break; |
564 | } |
565 | |
566 | if ('\n' == *type) { |
567 | /* a blank line */ |
568 | continue; |
569 | } |
570 | |
571 | if (slen == strlen(type)) { |
572 | /* must be an empty line */ |
573 | continue; |
574 | } |
575 | |
576 | if (! (args = strtok(NULL, "\n"))) { |
577 | fprintf(stderr, |
578 | "ERROR: incorrect format, newline required line %d: '%s'\n", |
579 | line_nr, line); |
580 | ec = -1; |
581 | } |
582 | |
583 | for (type_idx = 0; file_handler_table[type_idx].type; type_idx++) { |
584 | int rc; |
585 | if (! strcmp(line, file_handler_table[type_idx].type)) { |
586 | if ((rc = file_handler_table[type_idx].handler(args))) { |
587 | ec = rc; |
588 | fprintf(stderr, " line %d\n", line_nr); |
589 | } |
590 | break; |
591 | } |
592 | } |
593 | |
594 | if (NULL == file_handler_table[type_idx].type) { |
595 | fprintf(stderr, "unknown file type line %d: '%s'\n", |
596 | line_nr, line); |
597 | } |
598 | } |
599 | if (ec == 0) |
600 | cpio_trailer(); |
601 | |
602 | exit(ec); |
603 | } |
604 |
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Tags:
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v2.6.34-rc5
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