Commit | Line | Data |
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a8fd2d0d KM |
1 | /* |
2 | * Copyright (c) 1982, 1986, 1990 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * %sccs.include.redist.c% | |
6 | * | |
e4fbbd91 | 7 | * @(#)sys.c 7.2 (Berkeley) %G% |
a8fd2d0d KM |
8 | */ |
9 | ||
10 | #include "saio.h" | |
11 | #include "ufs/dir.h" | |
12 | #ifndef SMALL | |
13 | #include "sys/stat.h" | |
14 | #endif | |
15 | ||
16 | ino_t dlook(); | |
17 | ||
18 | struct dirstuff { | |
19 | int loc; | |
20 | struct iob *io; | |
21 | }; | |
22 | ||
23 | static | |
24 | openi(n, io) | |
25 | register struct iob *io; | |
26 | { | |
27 | register struct dinode *dp; | |
28 | int cc; | |
29 | ||
30 | io->i_offset = 0; | |
31 | io->i_bn = fsbtodb(&io->i_fs, itod(&io->i_fs, n)) + io->i_boff; | |
32 | io->i_cc = io->i_fs.fs_bsize; | |
33 | io->i_ma = io->i_buf; | |
34 | cc = devread(io); | |
35 | dp = (struct dinode *)io->i_buf; | |
e4fbbd91 | 36 | io->i_ino = dp[itoo(&io->i_fs, n)]; |
a8fd2d0d KM |
37 | return (cc); |
38 | } | |
39 | ||
40 | static | |
41 | find(path, file) | |
42 | register char *path; | |
43 | struct iob *file; | |
44 | { | |
45 | register char *q; | |
46 | char c; | |
47 | int n; | |
48 | ||
49 | if (path==NULL || *path=='\0') { | |
50 | printf("null path\n"); | |
51 | return (0); | |
52 | } | |
53 | ||
54 | if (openi((ino_t) ROOTINO, file) < 0) { | |
55 | printf("can't read root inode\n"); | |
56 | return (0); | |
57 | } | |
58 | while (*path) { | |
59 | while (*path == '/') | |
60 | path++; | |
61 | q = path; | |
62 | while(*q != '/' && *q != '\0') | |
63 | q++; | |
64 | c = *q; | |
65 | *q = '\0'; | |
66 | if (q == path) path = "." ; /* "/" means "/." */ | |
67 | ||
68 | if ((n = dlook(path, file)) != 0) { | |
69 | if (c == '\0') | |
70 | break; | |
71 | if (openi(n, file) < 0) | |
72 | return (0); | |
73 | *q = c; | |
74 | path = q; | |
75 | continue; | |
76 | } else { | |
77 | printf("%s: not found\n", path); | |
78 | return (0); | |
79 | } | |
80 | } | |
81 | return (n); | |
82 | } | |
83 | ||
84 | static daddr_t | |
85 | sbmap(io, bn) | |
86 | register struct iob *io; | |
87 | daddr_t bn; | |
88 | { | |
e4fbbd91 | 89 | register struct dinode *ip; |
a8fd2d0d KM |
90 | int i, j, sh; |
91 | daddr_t nb, *bap; | |
92 | ||
93 | ip = &io->i_ino; | |
94 | if (bn < 0) { | |
95 | printf("bn negative\n"); | |
96 | return ((daddr_t)0); | |
97 | } | |
98 | ||
99 | /* | |
100 | * blocks 0..NDADDR are direct blocks | |
101 | */ | |
102 | if(bn < NDADDR) { | |
e4fbbd91 | 103 | nb = ip->di_db[bn]; |
a8fd2d0d KM |
104 | return (nb); |
105 | } | |
106 | ||
107 | /* | |
108 | * addresses NIADDR have single and double indirect blocks. | |
109 | * the first step is to determine how many levels of indirection. | |
110 | */ | |
111 | sh = 1; | |
112 | bn -= NDADDR; | |
113 | for (j = NIADDR; j > 0; j--) { | |
114 | sh *= NINDIR(&io->i_fs); | |
115 | if (bn < sh) | |
116 | break; | |
117 | bn -= sh; | |
118 | } | |
119 | if (j == 0) { | |
120 | printf("bn ovf %D\n", bn); | |
121 | return ((daddr_t)0); | |
122 | } | |
123 | ||
124 | /* | |
125 | * fetch the first indirect block address from the inode | |
126 | */ | |
e4fbbd91 | 127 | nb = ip->di_ib[NIADDR - j]; |
a8fd2d0d KM |
128 | if (nb == 0) { |
129 | printf("bn void %D\n",bn); | |
130 | return ((daddr_t)0); | |
131 | } | |
132 | ||
133 | /* | |
134 | * fetch through the indirect blocks | |
135 | */ | |
136 | for (; j <= NIADDR; j++) { | |
137 | if (blknos[j] != nb) { | |
138 | io->i_bn = fsbtodb(&io->i_fs, nb) + io->i_boff; | |
139 | io->i_ma = b[j]; | |
140 | io->i_cc = io->i_fs.fs_bsize; | |
141 | if (devread(io) != io->i_fs.fs_bsize) { | |
142 | if (io->i_error) | |
143 | errno = io->i_error; | |
144 | printf("bn %D: read error\n", io->i_bn); | |
145 | return ((daddr_t)0); | |
146 | } | |
147 | blknos[j] = nb; | |
148 | } | |
149 | bap = (daddr_t *)b[j]; | |
150 | sh /= NINDIR(&io->i_fs); | |
151 | i = (bn / sh) % NINDIR(&io->i_fs); | |
152 | nb = bap[i]; | |
153 | if(nb == 0) { | |
154 | printf("bn void %D\n",bn); | |
155 | return ((daddr_t)0); | |
156 | } | |
157 | } | |
158 | return (nb); | |
159 | } | |
160 | ||
161 | static ino_t | |
162 | dlook(s, io) | |
163 | char *s; | |
164 | register struct iob *io; | |
165 | { | |
166 | register struct direct *dp; | |
e4fbbd91 MK |
167 | struct direct *readdir(); |
168 | register struct dinode *ip; | |
a8fd2d0d KM |
169 | struct dirstuff dirp; |
170 | int len; | |
171 | ||
172 | if (s == NULL || *s == '\0') | |
173 | return (0); | |
174 | ip = &io->i_ino; | |
e4fbbd91 | 175 | if ((ip->di_mode&IFMT) != IFDIR) { |
a8fd2d0d KM |
176 | printf("not a directory\n"); |
177 | printf("%s: not a directory\n", s); | |
178 | return (0); | |
179 | } | |
e4fbbd91 | 180 | if (ip->di_size == 0) { |
a8fd2d0d KM |
181 | printf("%s: zero length directory\n", s); |
182 | return (0); | |
183 | } | |
184 | len = strlen(s); | |
185 | dirp.loc = 0; | |
186 | dirp.io = io; | |
187 | for (dp = readdir(&dirp); dp != NULL; dp = readdir(&dirp)) { | |
188 | if(dp->d_ino == 0) | |
189 | continue; | |
190 | if (dp->d_namlen == len && !strcmp(s, dp->d_name)) | |
191 | return (dp->d_ino); | |
192 | } | |
193 | return (0); | |
194 | } | |
195 | ||
196 | /* | |
197 | * get next entry in a directory. | |
198 | */ | |
199 | struct direct * | |
200 | readdir(dirp) | |
201 | register struct dirstuff *dirp; | |
202 | { | |
203 | register struct direct *dp; | |
204 | register struct iob *io; | |
205 | daddr_t lbn, d; | |
206 | int off; | |
207 | ||
208 | io = dirp->io; | |
209 | for(;;) { | |
e4fbbd91 | 210 | if (dirp->loc >= io->i_ino.di_size) |
a8fd2d0d KM |
211 | return (NULL); |
212 | off = blkoff(&io->i_fs, dirp->loc); | |
213 | if (off == 0) { | |
214 | lbn = lblkno(&io->i_fs, dirp->loc); | |
215 | d = sbmap(io, lbn); | |
216 | if(d == 0) | |
217 | return NULL; | |
218 | io->i_bn = fsbtodb(&io->i_fs, d) + io->i_boff; | |
219 | io->i_ma = io->i_buf; | |
e4fbbd91 | 220 | io->i_cc = dblksize(&io->i_fs, &io->i_ino, lbn); |
a8fd2d0d KM |
221 | if (devread(io) < 0) { |
222 | errno = io->i_error; | |
223 | printf("bn %D: directory read error\n", | |
224 | io->i_bn); | |
225 | return (NULL); | |
226 | } | |
227 | } | |
228 | dp = (struct direct *)(io->i_buf + off); | |
229 | dirp->loc += dp->d_reclen; | |
230 | if (dp->d_ino == 0) | |
231 | continue; | |
232 | return (dp); | |
233 | } | |
234 | } | |
235 | ||
236 | lseek(fdesc, addr, ptr) | |
237 | int fdesc, ptr; | |
238 | off_t addr; | |
239 | { | |
240 | register struct iob *io; | |
241 | ||
242 | #ifndef SMALL | |
243 | if (ptr != 0) { | |
244 | printf("Seek not from beginning of file\n"); | |
245 | errno = EOFFSET; | |
246 | return (-1); | |
247 | } | |
248 | #endif SMALL | |
249 | fdesc -= 3; | |
250 | if (fdesc < 0 || fdesc >= NFILES || | |
251 | ((io = &iob[fdesc])->i_flgs & F_ALLOC) == 0) { | |
252 | errno = EBADF; | |
253 | return (-1); | |
254 | } | |
255 | io->i_offset = addr; | |
256 | io->i_bn = addr / DEV_BSIZE; | |
257 | io->i_cc = 0; | |
258 | return (0); | |
259 | } | |
260 | ||
261 | getc(fdesc) | |
262 | int fdesc; | |
263 | { | |
264 | register struct iob *io; | |
265 | register struct fs *fs; | |
266 | register char *p; | |
267 | int c, lbn, off, size, diff; | |
268 | ||
269 | ||
270 | if (fdesc >= 0 && fdesc <= 2) | |
271 | return (getchar()); | |
272 | fdesc -= 3; | |
273 | if (fdesc < 0 || fdesc >= NFILES || | |
274 | ((io = &iob[fdesc])->i_flgs&F_ALLOC) == 0) { | |
275 | errno = EBADF; | |
276 | return (-1); | |
277 | } | |
278 | p = io->i_ma; | |
279 | if (io->i_cc <= 0) { | |
280 | if ((io->i_flgs & F_FILE) != 0) { | |
e4fbbd91 | 281 | diff = io->i_ino.di_size - io->i_offset; |
a8fd2d0d KM |
282 | if (diff <= 0) |
283 | return (-1); | |
284 | fs = &io->i_fs; | |
285 | lbn = lblkno(fs, io->i_offset); | |
286 | io->i_bn = fsbtodb(fs, sbmap(io, lbn)) + io->i_boff; | |
287 | off = blkoff(fs, io->i_offset); | |
e4fbbd91 | 288 | size = dblksize(fs, &io->i_ino, lbn); |
a8fd2d0d KM |
289 | } else { |
290 | io->i_bn = io->i_offset / DEV_BSIZE; | |
291 | off = 0; | |
292 | size = DEV_BSIZE; | |
293 | } | |
294 | io->i_ma = io->i_buf; | |
295 | io->i_cc = size; | |
296 | if (devread(io) < 0) { | |
297 | errno = io->i_error; | |
298 | return (-1); | |
299 | } | |
300 | if ((io->i_flgs & F_FILE) != 0) { | |
e4fbbd91 | 301 | if (io->i_offset - off + size >= io->i_ino.di_size) |
a8fd2d0d KM |
302 | io->i_cc = diff + off; |
303 | io->i_cc -= off; | |
304 | } | |
305 | p = &io->i_buf[off]; | |
306 | } | |
307 | io->i_cc--; | |
308 | io->i_offset++; | |
309 | c = (unsigned)*p++; | |
310 | io->i_ma = p; | |
311 | return (c); | |
312 | } | |
313 | ||
314 | int errno; | |
315 | ||
316 | read(fdesc, buf, count) | |
317 | int fdesc, count; | |
318 | char *buf; | |
319 | { | |
320 | register i, size; | |
321 | register struct iob *file; | |
322 | register struct fs *fs; | |
323 | int lbn, off; | |
324 | ||
325 | errno = 0; | |
326 | if (fdesc >= 0 & fdesc <= 2) { | |
327 | i = count; | |
328 | do { | |
329 | *buf = getchar(); | |
330 | } while (--i && *buf++ != '\n'); | |
331 | return (count - i); | |
332 | } | |
333 | fdesc -= 3; | |
334 | if (fdesc < 0 || fdesc >= NFILES || | |
335 | ((file = &iob[fdesc])->i_flgs&F_ALLOC) == 0) { | |
336 | errno = EBADF; | |
337 | return (-1); | |
338 | } | |
339 | if ((file->i_flgs&F_READ) == 0) { | |
340 | errno = EBADF; | |
341 | return (-1); | |
342 | } | |
343 | #ifndef SMALL | |
344 | if ((file->i_flgs & F_FILE) == 0) { | |
345 | file->i_cc = count; | |
346 | file->i_ma = buf; | |
347 | file->i_bn = file->i_boff + (file->i_offset / DEV_BSIZE); | |
348 | i = devread(file); | |
349 | file->i_offset += count; | |
350 | if (i < 0) | |
351 | errno = file->i_error; | |
352 | return (i); | |
353 | } | |
354 | #endif SMALL | |
e4fbbd91 MK |
355 | if (file->i_offset+count > file->i_ino.di_size) |
356 | count = file->i_ino.di_size - file->i_offset; | |
a8fd2d0d KM |
357 | if ((i = count) <= 0) |
358 | return (0); | |
359 | /* | |
360 | * While reading full blocks, do I/O into user buffer. | |
361 | * Anything else uses getc(). | |
362 | */ | |
363 | fs = &file->i_fs; | |
364 | while (i) { | |
365 | off = blkoff(fs, file->i_offset); | |
366 | lbn = lblkno(fs, file->i_offset); | |
e4fbbd91 | 367 | size = dblksize(fs, &file->i_ino, lbn); |
a8fd2d0d KM |
368 | if (off == 0 && size <= i) { |
369 | file->i_bn = fsbtodb(fs, sbmap(file, lbn)) + | |
370 | file->i_boff; | |
371 | file->i_cc = size; | |
372 | file->i_ma = buf; | |
373 | if (devread(file) < 0) { | |
374 | errno = file->i_error; | |
375 | return (-1); | |
376 | } | |
377 | file->i_offset += size; | |
378 | file->i_cc = 0; | |
379 | buf += size; | |
380 | i -= size; | |
381 | } else { | |
382 | size -= off; | |
383 | if (size > i) | |
384 | size = i; | |
385 | i -= size; | |
386 | do { | |
387 | *buf++ = getc(fdesc+3); | |
388 | } while (--size); | |
389 | } | |
390 | } | |
391 | return (count); | |
392 | } | |
393 | ||
394 | #ifndef SMALL | |
395 | write(fdesc, buf, count) | |
396 | int fdesc, count; | |
397 | char *buf; | |
398 | { | |
399 | register i; | |
400 | register struct iob *file; | |
401 | ||
402 | errno = 0; | |
403 | if (fdesc >= 0 && fdesc <= 2) { | |
404 | i = count; | |
405 | while (i--) | |
406 | putchar(0, *buf++); | |
407 | return (count); | |
408 | } | |
409 | fdesc -= 3; | |
410 | if (fdesc < 0 || fdesc >= NFILES || | |
411 | ((file = &iob[fdesc])->i_flgs&F_ALLOC) == 0) { | |
412 | errno = EBADF; | |
413 | return (-1); | |
414 | } | |
415 | if ((file->i_flgs&F_WRITE) == 0) { | |
416 | errno = EBADF; | |
417 | return (-1); | |
418 | } | |
419 | file->i_cc = count; | |
420 | file->i_ma = buf; | |
421 | file->i_bn = file->i_boff + (file->i_offset / DEV_BSIZE); | |
422 | i = devwrite(file); | |
423 | file->i_offset += count; | |
424 | if (i < 0) | |
425 | errno = file->i_error; | |
426 | return (i); | |
427 | } | |
428 | #endif SMALL | |
429 | ||
430 | int openfirst = 1; | |
431 | #ifdef notyet | |
432 | int opendev; /* last device opened; for boot to set bootdev */ | |
433 | extern int bootdev; | |
434 | #endif notyet | |
435 | ||
436 | open(str, how) | |
437 | char *str; | |
438 | int how; | |
439 | { | |
440 | register char *cp; | |
441 | int i; | |
442 | register struct iob *file; | |
443 | register struct devsw *dp; | |
444 | int fdesc; | |
445 | long atol(); | |
446 | ||
447 | if (openfirst) { | |
448 | for (i = 0; i < NFILES; i++) | |
449 | iob[i].i_flgs = 0; | |
450 | openfirst = 0; | |
451 | } | |
452 | ||
453 | for (fdesc = 0; fdesc < NFILES; fdesc++) | |
454 | if (iob[fdesc].i_flgs == 0) | |
455 | goto gotfile; | |
456 | _stop("No more file slots"); | |
457 | gotfile: | |
458 | (file = &iob[fdesc])->i_flgs |= F_ALLOC; | |
459 | ||
460 | #ifdef notyet | |
461 | for (cp = str; *cp && *cp != '/' && *cp != ':'; cp++) | |
462 | ; | |
463 | if (*cp != ':') { | |
464 | /* default bootstrap unit and device */ | |
e4fbbd91 | 465 | file->i_dev = bootdev; |
a8fd2d0d KM |
466 | cp = str; |
467 | } else { | |
468 | # define isdigit(n) ((n>='0') && (n<='9')) | |
469 | /* | |
470 | * syntax for possible device name: | |
471 | * <alpha-string><digit-string><letter>: | |
472 | */ | |
473 | for (cp = str; *cp != ':' && !isdigit(*cp); cp++) | |
474 | ; | |
475 | for (dp = devsw; dp->dv_name; dp++) { | |
476 | if (!strncmp(str, dp->dv_name,cp-str)) | |
477 | goto gotdev; | |
478 | } | |
479 | printf("unknown device\n"); | |
480 | file->i_flgs = 0; | |
481 | errno = EDEV; | |
482 | return (-1); | |
483 | gotdev: | |
484 | i = 0; | |
485 | while (*cp >= '0' && *cp <= '9') | |
486 | i = i * 10 + *cp++ - '0'; | |
487 | if (i < 0 || i > 255) { | |
488 | printf("minor device number out of range (0-255)\n"); | |
489 | file->i_flgs = 0; | |
490 | errno = EUNIT; | |
491 | return (-1); | |
492 | } | |
493 | if (*cp >= 'a' && *cp <= 'h') { | |
494 | if (i > 31) { | |
495 | printf("unit number out of range (0-31)\n"); | |
496 | file->i_flgs = 0; | |
497 | errno = EUNIT; | |
498 | return (-1); | |
499 | } | |
500 | i = make_minor(i, *cp++ - 'a'); | |
501 | } | |
502 | ||
503 | if (*cp++ != ':') { | |
504 | printf("incorrect device specification\n"); | |
505 | file->i_flgs = 0; | |
506 | errno = EOFFSET; | |
507 | return (-1); | |
508 | } | |
e4fbbd91 | 509 | opendev = file->i_dev = makedev(dp-devsw, i); |
a8fd2d0d KM |
510 | } |
511 | file->i_boff = 0; | |
512 | devopen(file); | |
513 | if (cp != str && *cp == '\0') { | |
514 | file->i_flgs |= how+1; | |
515 | file->i_cc = 0; | |
516 | file->i_offset = 0; | |
517 | return (fdesc+3); | |
518 | } | |
519 | #else notyet | |
520 | for (cp = str; *cp && *cp != '('; cp++) | |
521 | ; | |
522 | if (*cp != '(') { | |
523 | printf("Bad device\n"); | |
524 | file->i_flgs = 0; | |
525 | errno = EDEV; | |
526 | return (-1); | |
527 | } | |
528 | *cp = '\0'; | |
529 | for (dp = devsw; dp->dv_name; dp++) | |
530 | if (!strcmp(str, dp->dv_name)) | |
531 | break; | |
532 | *cp++ = '('; | |
533 | if (dp->dv_name == NULL) { | |
534 | printf("Unknown device\n"); | |
535 | file->i_flgs = 0; | |
536 | errno = ENXIO; | |
537 | return (-1); | |
538 | } | |
e4fbbd91 | 539 | file->i_dev = dp-devsw; |
a8fd2d0d KM |
540 | file->i_unit = *cp++ - '0'; |
541 | if (*cp >= '0' && *cp <= '9') | |
542 | file->i_unit = file->i_unit * 10 + *cp++ - '0'; | |
543 | if (file->i_unit < 0 || file->i_unit > 63) { | |
544 | printf("Bad unit specifier\n"); | |
545 | file->i_flgs = 0; | |
546 | errno = EUNIT; | |
547 | return (-1); | |
548 | } | |
549 | if (*cp++ != ',') { | |
550 | badoff: | |
551 | printf("Missing offset specification\n"); | |
552 | file->i_flgs = 0; | |
553 | errno = EOFFSET; | |
554 | return (-1); | |
555 | } | |
556 | file->i_boff = atol(cp); | |
557 | for (;;) { | |
558 | if (*cp == ')') | |
559 | break; | |
560 | if (*cp++) | |
561 | continue; | |
562 | goto badoff; | |
563 | } | |
564 | devopen(file); | |
565 | if (*++cp == '\0') { | |
566 | file->i_flgs |= how+1; | |
567 | file->i_cc = 0; | |
568 | file->i_offset = 0; | |
569 | return (fdesc+3); | |
570 | } | |
571 | #endif notyet | |
572 | file->i_ma = (char *)(&file->i_fs); | |
573 | file->i_cc = SBSIZE; | |
574 | file->i_bn = SBLOCK + file->i_boff; | |
575 | file->i_offset = 0; | |
576 | if (devread(file) < 0) { | |
577 | errno = file->i_error; | |
578 | printf("super block read error\n"); | |
579 | return (-1); | |
580 | } | |
581 | if ((i = find(cp, file)) == 0) { | |
582 | file->i_flgs = 0; | |
583 | errno = ESRCH; | |
584 | return (-1); | |
585 | } | |
586 | #ifndef SMALL | |
587 | if (how != 0) { | |
588 | printf("Can't write files yet.. Sorry\n"); | |
589 | file->i_flgs = 0; | |
590 | errno = EIO; | |
591 | return (-1); | |
592 | } | |
593 | #endif SMALL | |
594 | if (openi(i, file) < 0) { | |
595 | errno = file->i_error; | |
596 | return (-1); | |
597 | } | |
598 | file->i_offset = 0; | |
599 | file->i_cc = 0; | |
600 | file->i_flgs |= F_FILE | (how+1); | |
601 | return (fdesc+3); | |
602 | } | |
603 | ||
604 | close(fdesc) | |
605 | int fdesc; | |
606 | { | |
607 | struct iob *file; | |
608 | ||
609 | fdesc -= 3; | |
610 | if (fdesc < 0 || fdesc >= NFILES || | |
611 | ((file = &iob[fdesc])->i_flgs&F_ALLOC) == 0) { | |
612 | errno = EBADF; | |
613 | return (-1); | |
614 | } | |
615 | if ((file->i_flgs&F_FILE) == 0) | |
616 | devclose(file); | |
617 | file->i_flgs = 0; | |
618 | return (0); | |
619 | } | |
620 | ||
621 | exit() | |
622 | { | |
623 | _stop("Exit called"); | |
624 | } | |
625 | ||
626 | _stop(s) | |
627 | char *s; | |
628 | { | |
629 | static int stopped = 0; | |
630 | int i; | |
631 | ||
632 | if (!stopped) { | |
633 | stopped++; | |
634 | for (i = 0; i < NFILES; i++) | |
635 | if (iob[i].i_flgs != 0) | |
636 | close(i); | |
637 | } | |
638 | printf("%s\n", s); | |
639 | _rtt(); | |
640 | } | |
641 | ||
642 | #ifndef SMALL | |
643 | ioctl(fdesc, cmd, arg) | |
644 | int fdesc, cmd; | |
645 | char *arg; | |
646 | { | |
647 | register struct iob *file; | |
648 | int error = 0; | |
649 | ||
650 | fdesc -= 3; | |
651 | if (fdesc < 0 || fdesc >= NFILES || | |
652 | ((file = &iob[fdesc])->i_flgs&F_ALLOC) == 0) { | |
653 | errno = EBADF; | |
654 | return (-1); | |
655 | } | |
656 | switch (cmd) { | |
657 | ||
658 | case SAIOHDR: | |
659 | file->i_flgs |= F_HDR; | |
660 | break; | |
661 | ||
662 | case SAIOCHECK: | |
663 | file->i_flgs |= F_CHECK; | |
664 | break; | |
665 | ||
666 | case SAIOHCHECK: | |
667 | file->i_flgs |= F_HCHECK; | |
668 | break; | |
669 | ||
670 | case SAIONOBAD: | |
671 | file->i_flgs |= F_NBSF; | |
672 | break; | |
673 | ||
674 | case SAIODOBAD: | |
675 | file->i_flgs &= ~F_NBSF; | |
676 | break; | |
677 | ||
678 | default: | |
679 | error = devioctl(file, cmd, arg); | |
680 | break; | |
681 | } | |
682 | if (error < 0) | |
683 | errno = file->i_error; | |
684 | return (error); | |
685 | } | |
686 | ||
687 | extern char end; | |
688 | static caddr_t theend = 0; | |
689 | ||
690 | caddr_t | |
691 | brk(addr) | |
692 | char *addr; | |
693 | { | |
694 | char stkloc; | |
695 | ||
696 | if (theend == (caddr_t)0) | |
697 | theend = &end; | |
698 | if (addr > &stkloc || addr < &end) | |
699 | return((caddr_t)-1); | |
700 | if (addr > theend) | |
701 | bzero(theend, addr-theend); | |
702 | theend = addr; | |
703 | return(0); | |
704 | } | |
705 | ||
706 | caddr_t | |
707 | sbrk(incr) | |
708 | int incr; | |
709 | { | |
710 | caddr_t obrk, brk(); | |
711 | ||
712 | if (theend == (caddr_t)0) | |
713 | theend = &end; | |
714 | obrk = theend; | |
715 | if (brk(theend+incr) == (caddr_t)-1) | |
716 | return((caddr_t)-1); | |
717 | return(obrk); | |
718 | } | |
719 | ||
720 | getpagesize() | |
721 | { | |
722 | return(NBPG); | |
723 | } | |
724 | ||
725 | getdtablesize() | |
726 | { | |
727 | return(NFILES); | |
728 | } | |
729 | ||
730 | fstat(fdesc, sb) | |
731 | struct stat *sb; | |
732 | { | |
733 | register struct iob *io; | |
734 | ||
735 | fdesc -= 3; | |
736 | if (fdesc < 0 || fdesc >= NFILES || | |
737 | ((io = &iob[fdesc])->i_flgs & F_ALLOC) == 0) { | |
738 | errno = EBADF; | |
739 | return (-1); | |
740 | } | |
741 | /* only important stuff */ | |
e4fbbd91 MK |
742 | sb->st_mode = io->i_ino.di_mode; |
743 | sb->st_uid = io->i_ino.di_uid; | |
744 | sb->st_gid = io->i_ino.di_gid; | |
745 | sb->st_size = io->i_ino.di_size; | |
a8fd2d0d KM |
746 | return (0); |
747 | } | |
748 | ||
749 | stat(str, sb) | |
750 | { | |
751 | /* the easy way */ | |
752 | int f, rv = 0; | |
753 | ||
754 | f = open(str, 0); | |
755 | if (f < 0 || fstat(f, sb) < 0) | |
756 | rv = -1; | |
757 | (void) close(f); | |
758 | return(rv); | |
759 | } | |
760 | ||
761 | #endif SMALL |