Commit | Line | Data |
---|---|---|
64d3a787 | 1 | /* ffs_vnops.c 4.31 82/07/25 */ |
6459ebe0 | 2 | |
d67a03eb BJ |
3 | #include "../h/param.h" |
4 | #include "../h/systm.h" | |
d67a03eb BJ |
5 | #include "../h/dir.h" |
6 | #include "../h/user.h" | |
d67a03eb | 7 | #include "../h/file.h" |
6459ebe0 | 8 | #include "../h/stat.h" |
3e78e260 | 9 | #include "../h/inode.h" |
6459ebe0 | 10 | #include "../h/fs.h" |
3e78e260 | 11 | #include "../h/buf.h" |
3e78e260 | 12 | #include "../h/proc.h" |
0737b714 | 13 | #include "../h/inline.h" |
f94ceb3b BJ |
14 | #ifdef EFS |
15 | #include "../net/in.h" | |
16 | #include "../h/efs.h" | |
17 | #endif | |
0a77f278 | 18 | #include "../h/quota.h" |
4147b3f6 | 19 | #include "../h/descrip.h" |
3e78e260 BJ |
20 | |
21 | chdir() | |
22 | { | |
23 | ||
24 | chdirec(&u.u_cdir); | |
25 | } | |
26 | ||
27 | chroot() | |
28 | { | |
29 | ||
30 | if (suser()) | |
31 | chdirec(&u.u_rdir); | |
32 | } | |
33 | ||
34 | chdirec(ipp) | |
35 | register struct inode **ipp; | |
36 | { | |
37 | register struct inode *ip; | |
38 | struct a { | |
39 | char *fname; | |
40 | }; | |
41 | ||
42 | ip = namei(uchar, 0, 1); | |
43 | if(ip == NULL) | |
44 | return; | |
45 | if((ip->i_mode&IFMT) != IFDIR) { | |
46 | u.u_error = ENOTDIR; | |
47 | goto bad; | |
48 | } | |
49 | if(access(ip, IEXEC)) | |
50 | goto bad; | |
ca91bded | 51 | iunlock(ip); |
8eee8525 KM |
52 | if (*ipp) |
53 | irele(*ipp); | |
3e78e260 BJ |
54 | *ipp = ip; |
55 | return; | |
56 | ||
57 | bad: | |
58 | iput(ip); | |
59 | } | |
60 | ||
61 | /* | |
62 | * Open system call. | |
63 | */ | |
64 | open() | |
65 | { | |
66 | register struct inode *ip; | |
67 | register struct a { | |
68 | char *fname; | |
69 | int rwmode; | |
70 | } *uap; | |
71 | ||
72 | uap = (struct a *)u.u_ap; | |
73 | ip = namei(uchar, 0, 1); | |
74 | if (ip == NULL) | |
75 | return; | |
76 | open1(ip, ++uap->rwmode, 0); | |
77 | } | |
78 | ||
79 | /* | |
80 | * Creat system call. | |
81 | */ | |
4147b3f6 | 82 | ocreat() |
3e78e260 BJ |
83 | { |
84 | register struct inode *ip; | |
85 | register struct a { | |
86 | char *fname; | |
87 | int fmode; | |
88 | } *uap; | |
89 | ||
90 | uap = (struct a *)u.u_ap; | |
91 | ip = namei(uchar, 1, 1); | |
92 | if (ip == NULL) { | |
93 | if (u.u_error) | |
94 | return; | |
95 | ip = maknode(uap->fmode&07777&(~ISVTX)); | |
96 | if (ip==NULL) | |
97 | return; | |
98 | open1(ip, FWRITE, 2); | |
99 | } else | |
100 | open1(ip, FWRITE, 1); | |
101 | } | |
102 | ||
103 | /* | |
104 | * Common code for open and creat. | |
105 | * Check permissions, allocate an open file structure, | |
106 | * and call the device open routine if any. | |
107 | */ | |
108 | open1(ip, mode, trf) | |
109 | register struct inode *ip; | |
110 | register mode; | |
111 | { | |
112 | register struct file *fp; | |
113 | int i; | |
114 | ||
115 | if (trf != 2) { | |
116 | if (mode&FREAD) | |
117 | (void) access(ip, IREAD); | |
118 | if (mode&FWRITE) { | |
119 | (void) access(ip, IWRITE); | |
120 | if ((ip->i_mode&IFMT) == IFDIR) | |
121 | u.u_error = EISDIR; | |
122 | } | |
123 | } | |
8eee8525 KM |
124 | if (u.u_error) { |
125 | iput(ip); | |
126 | return; | |
127 | } | |
3e78e260 BJ |
128 | if (trf == 1) |
129 | itrunc(ip); | |
ca91bded | 130 | iunlock(ip); |
3e78e260 BJ |
131 | if ((fp = falloc()) == NULL) |
132 | goto out; | |
133 | fp->f_flag = mode&(FREAD|FWRITE); | |
4147b3f6 | 134 | fp->f_type = DTYPE_FILE; |
3e78e260 BJ |
135 | i = u.u_r.r_val1; |
136 | fp->f_inode = ip; | |
f94ceb3b BJ |
137 | #ifdef EFS |
138 | openi(ip, mode&(FREAD|FWRITE), trf); | |
139 | #else | |
3e78e260 | 140 | openi(ip, mode&(FREAD|FWRITE)); |
f94ceb3b | 141 | #endif |
3e78e260 BJ |
142 | if (u.u_error == 0) |
143 | return; | |
144 | u.u_ofile[i] = NULL; | |
145 | fp->f_count--; | |
146 | out: | |
8eee8525 | 147 | irele(ip); |
3e78e260 BJ |
148 | } |
149 | ||
150 | /* | |
151 | * Mknod system call | |
152 | */ | |
153 | mknod() | |
154 | { | |
155 | register struct inode *ip; | |
156 | register struct a { | |
157 | char *fname; | |
158 | int fmode; | |
159 | int dev; | |
160 | } *uap; | |
161 | ||
162 | uap = (struct a *)u.u_ap; | |
163 | if (suser()) { | |
164 | ip = namei(uchar, 1, 0); | |
165 | if (ip != NULL) { | |
166 | u.u_error = EEXIST; | |
167 | goto out; | |
168 | } | |
169 | } | |
170 | if (u.u_error) | |
171 | return; | |
172 | ip = maknode(uap->fmode); | |
173 | if (ip == NULL) | |
174 | return; | |
175 | if (uap->dev) { | |
176 | /* | |
177 | * Want to be able to use this to make badblock | |
178 | * inodes, so don't truncate the dev number. | |
179 | */ | |
6459ebe0 | 180 | ip->i_rdev = uap->dev; |
3e78e260 BJ |
181 | ip->i_flag |= IACC|IUPD|ICHG; |
182 | } | |
183 | ||
184 | out: | |
185 | iput(ip); | |
186 | } | |
187 | ||
188 | /* | |
189 | * link system call | |
190 | */ | |
191 | link() | |
192 | { | |
193 | register struct inode *ip, *xp; | |
194 | register struct a { | |
195 | char *target; | |
196 | char *linkname; | |
197 | } *uap; | |
198 | ||
199 | uap = (struct a *)u.u_ap; | |
200 | ip = namei(uchar, 0, 1); /* well, this routine is doomed anyhow */ | |
201 | if (ip == NULL) | |
202 | return; | |
f94ceb3b BJ |
203 | if ((ip->i_mode&IFMT)==IFDIR && !suser()) { |
204 | iput(ip); | |
205 | return; | |
206 | } | |
3e78e260 BJ |
207 | ip->i_nlink++; |
208 | ip->i_flag |= ICHG; | |
209 | iupdat(ip, &time, &time, 1); | |
ca91bded | 210 | iunlock(ip); |
3e78e260 BJ |
211 | u.u_dirp = (caddr_t)uap->linkname; |
212 | xp = namei(uchar, 1, 0); | |
213 | if (xp != NULL) { | |
214 | u.u_error = EEXIST; | |
215 | iput(xp); | |
216 | goto out; | |
217 | } | |
218 | if (u.u_error) | |
219 | goto out; | |
220 | if (u.u_pdir->i_dev != ip->i_dev) { | |
221 | iput(u.u_pdir); | |
222 | u.u_error = EXDEV; | |
223 | goto out; | |
224 | } | |
64d3a787 | 225 | direnter(ip); |
3e78e260 BJ |
226 | out: |
227 | if (u.u_error) { | |
228 | ip->i_nlink--; | |
229 | ip->i_flag |= ICHG; | |
230 | } | |
231 | out1: | |
8eee8525 | 232 | irele(ip); |
3e78e260 BJ |
233 | } |
234 | ||
235 | /* | |
236 | * symlink -- make a symbolic link | |
237 | */ | |
238 | symlink() | |
239 | { | |
240 | register struct a { | |
241 | char *target; | |
242 | char *linkname; | |
243 | } *uap; | |
244 | register struct inode *ip; | |
245 | register char *tp; | |
246 | register c, nc; | |
247 | ||
248 | uap = (struct a *)u.u_ap; | |
249 | tp = uap->target; | |
250 | nc = 0; | |
251 | while (c = fubyte(tp)) { | |
252 | if (c < 0) { | |
253 | u.u_error = EFAULT; | |
254 | return; | |
255 | } | |
256 | tp++; | |
257 | nc++; | |
258 | } | |
259 | u.u_dirp = uap->linkname; | |
260 | ip = namei(uchar, 1, 0); | |
261 | if (ip) { | |
262 | iput(ip); | |
263 | u.u_error = EEXIST; | |
264 | return; | |
265 | } | |
266 | if (u.u_error) | |
267 | return; | |
268 | ip = maknode(IFLNK | 0777); | |
269 | if (ip == NULL) | |
270 | return; | |
271 | u.u_base = uap->target; | |
272 | u.u_count = nc; | |
273 | u.u_offset = 0; | |
274 | u.u_segflg = 0; | |
275 | writei(ip); | |
276 | iput(ip); | |
277 | } | |
278 | ||
279 | /* | |
280 | * Unlink system call. | |
281 | * Hard to avoid races here, especially | |
282 | * in unlinking directories. | |
283 | */ | |
284 | unlink() | |
285 | { | |
286 | register struct inode *ip, *pp; | |
287 | struct a { | |
288 | char *fname; | |
289 | }; | |
6459ebe0 KM |
290 | struct fs *fs; |
291 | struct buf *bp; | |
292 | int lbn, bn, base; | |
8eee8525 | 293 | int unlinkingdot = 0; |
3e78e260 BJ |
294 | |
295 | pp = namei(uchar, 2, 0); | |
64d3a787 | 296 | if (pp == NULL) |
3e78e260 | 297 | return; |
f94ceb3b BJ |
298 | #ifdef EFS |
299 | /* divert to extended file system if off machine. */ | |
300 | if (efsinode(pp)) { | |
301 | dev_t ndev = pp->i_rdev; | |
302 | ||
303 | iput(pp); /* avoid recursive hang on inode */ | |
304 | efsunlink(ndev); | |
305 | if (u.u_error != EEXIST) | |
306 | return; | |
307 | ||
308 | /* | |
309 | * If a null pathname remainder, then do | |
310 | * the unlink locally after restoring state. | |
311 | */ | |
312 | u.u_error = 0; | |
313 | u.u_dirp = (caddr_t)u.u_arg[0]; | |
314 | pp = namei(uchar, 2, 0); | |
315 | } | |
316 | #endif | |
317 | ||
3e78e260 BJ |
318 | /* |
319 | * Check for unlink(".") | |
320 | * to avoid hanging on the iget | |
321 | */ | |
322 | if (pp->i_number == u.u_dent.d_ino) { | |
323 | ip = pp; | |
324 | ip->i_count++; | |
8eee8525 | 325 | unlinkingdot++; |
3e78e260 | 326 | } else |
6459ebe0 | 327 | ip = iget(pp->i_dev, pp->i_fs, u.u_dent.d_ino); |
3e78e260 BJ |
328 | if(ip == NULL) |
329 | goto out1; | |
330 | if((ip->i_mode&IFMT)==IFDIR && !suser()) | |
331 | goto out; | |
332 | /* | |
333 | * Don't unlink a mounted file. | |
334 | */ | |
335 | if (ip->i_dev != pp->i_dev) { | |
336 | u.u_error = EBUSY; | |
337 | goto out; | |
338 | } | |
339 | if (ip->i_flag&ITEXT) | |
340 | xrele(ip); /* try once to free text */ | |
64d3a787 BJ |
341 | if (dirremove()) { |
342 | ip->i_nlink--; | |
343 | ip->i_flag |= ICHG; | |
6459ebe0 | 344 | } |
3e78e260 | 345 | out: |
8eee8525 KM |
346 | if (unlinkingdot) |
347 | irele(ip); | |
348 | else | |
349 | iput(ip); | |
3e78e260 BJ |
350 | out1: |
351 | iput(pp); | |
352 | } | |
353 | ||
354 | /* | |
355 | * Seek system call | |
356 | */ | |
357 | seek() | |
358 | { | |
359 | register struct file *fp; | |
360 | register struct a { | |
361 | int fdes; | |
362 | off_t off; | |
363 | int sbase; | |
364 | } *uap; | |
365 | ||
366 | uap = (struct a *)u.u_ap; | |
367 | fp = getf(uap->fdes); | |
368 | if (fp == NULL) | |
369 | return; | |
4147b3f6 | 370 | if (fp->f_type == DTYPE_SOCKET) { |
3e78e260 BJ |
371 | u.u_error = ESPIPE; |
372 | return; | |
373 | } | |
374 | if (uap->sbase == 1) | |
375 | uap->off += fp->f_offset; | |
f94ceb3b BJ |
376 | else if (uap->sbase == 2) { |
377 | #ifdef EFS | |
378 | struct inode *ip = fp->f_inode; | |
379 | uap->off += efsinode(ip) ? efsfilesize(fp) : ip->i_size; | |
380 | #else | |
3e78e260 | 381 | uap->off += fp->f_inode->i_size; |
f94ceb3b BJ |
382 | #endif |
383 | } | |
3e78e260 BJ |
384 | fp->f_offset = uap->off; |
385 | u.u_r.r_off = uap->off; | |
386 | } | |
387 | ||
388 | /* | |
389 | * Access system call | |
390 | */ | |
391 | saccess() | |
392 | { | |
393 | register svuid, svgid; | |
394 | register struct inode *ip; | |
395 | register struct a { | |
396 | char *fname; | |
397 | int fmode; | |
398 | } *uap; | |
399 | ||
400 | uap = (struct a *)u.u_ap; | |
401 | svuid = u.u_uid; | |
402 | svgid = u.u_gid; | |
403 | u.u_uid = u.u_ruid; | |
404 | u.u_gid = u.u_rgid; | |
405 | ip = namei(uchar, 0, 1); | |
f94ceb3b BJ |
406 | #ifdef EFS |
407 | if (efsinode(ip)) { | |
408 | dev_t ndev = ip->i_rdev; | |
409 | ||
410 | iput(ip); | |
411 | efssaccess(ndev); | |
412 | if (u.u_error != EEXIST) | |
413 | return; | |
414 | u.u_error = 0; | |
415 | u.u_dirp = (caddr_t)u.u_arg[0]; | |
416 | ip = namei(uchar, 0, 1); | |
417 | } | |
418 | #endif | |
3e78e260 BJ |
419 | if (ip != NULL) { |
420 | if (uap->fmode&(IREAD>>6)) | |
421 | (void) access(ip, IREAD); | |
422 | if (uap->fmode&(IWRITE>>6)) | |
423 | (void) access(ip, IWRITE); | |
424 | if (uap->fmode&(IEXEC>>6)) | |
425 | (void) access(ip, IEXEC); | |
426 | iput(ip); | |
427 | } | |
428 | u.u_uid = svuid; | |
429 | u.u_gid = svgid; | |
430 | } | |
d67a03eb BJ |
431 | |
432 | /* | |
433 | * the fstat system call. | |
434 | */ | |
435 | fstat() | |
436 | { | |
437 | register struct file *fp; | |
438 | register struct a { | |
439 | int fdes; | |
440 | struct stat *sb; | |
441 | } *uap; | |
442 | ||
443 | uap = (struct a *)u.u_ap; | |
444 | fp = getf(uap->fdes); | |
e92a04af | 445 | if (fp == NULL) |
d67a03eb | 446 | return; |
f94ceb3b BJ |
447 | #ifdef EFS |
448 | if (efsinode(fp->f_inode)) { | |
449 | efsfstat(fp->f_inode->i_rdev, fp); | |
450 | return; | |
451 | } | |
452 | #endif | |
4147b3f6 | 453 | if (fp->f_type == DTYPE_SOCKET) |
cc15ab5d | 454 | u.u_error = sostat(fp->f_socket, uap->sb); |
e92a04af BJ |
455 | else |
456 | stat1(fp->f_inode, uap->sb); | |
d67a03eb BJ |
457 | } |
458 | ||
459 | /* | |
6459ebe0 | 460 | * Stat system call. This version follows links. |
d67a03eb BJ |
461 | */ |
462 | stat() | |
463 | { | |
464 | register struct inode *ip; | |
465 | register struct a { | |
466 | char *fname; | |
467 | struct stat *sb; | |
468 | } *uap; | |
469 | ||
470 | uap = (struct a *)u.u_ap; | |
66d4ba1b | 471 | ip = namei(uchar, 0, 1); |
e92a04af | 472 | if (ip == NULL) |
d67a03eb | 473 | return; |
f94ceb3b BJ |
474 | #ifdef EFS |
475 | if (efsinode(ip)) { | |
476 | dev_t ndev = ip->i_rdev; | |
477 | ||
478 | iput(ip); | |
479 | efsstat(ndev); | |
480 | if (u.u_error != EEXIST) | |
481 | return; | |
482 | u.u_error = 0; | |
483 | u.u_dirp = (caddr_t)u.u_arg[0]; | |
484 | ip = namei(uchar, 0, 1); | |
485 | } | |
486 | #endif | |
a3aa7f92 | 487 | stat1(ip, uap->sb); |
d67a03eb BJ |
488 | iput(ip); |
489 | } | |
490 | ||
5485e062 | 491 | /* |
6459ebe0 | 492 | * Lstat system call. This version does not follow links. |
5485e062 BJ |
493 | */ |
494 | lstat() | |
495 | { | |
496 | register struct inode *ip; | |
497 | register struct a { | |
498 | char *fname; | |
499 | struct stat *sb; | |
500 | } *uap; | |
501 | ||
502 | uap = (struct a *)u.u_ap; | |
66d4ba1b | 503 | ip = namei(uchar, 0, 0); |
5485e062 BJ |
504 | if (ip == NULL) |
505 | return; | |
f94ceb3b BJ |
506 | #ifdef EFS |
507 | if (efsinode(ip)) { | |
508 | dev_t ndev = ip->i_rdev; | |
509 | ||
510 | iput(ip); | |
511 | efslstat(ndev); | |
512 | if (u.u_error != EEXIST) | |
513 | return; | |
514 | u.u_error = 0; | |
515 | u.u_dirp = (caddr_t)u.u_arg[0]; | |
516 | ip = namei(uchar, 0, 0); | |
517 | } | |
518 | #endif | |
019b08c9 | 519 | stat1(ip, uap->sb); |
5485e062 BJ |
520 | iput(ip); |
521 | } | |
522 | ||
d67a03eb BJ |
523 | /* |
524 | * The basic routine for fstat and stat: | |
525 | * get the inode and pass appropriate parts back. | |
526 | */ | |
a3aa7f92 | 527 | stat1(ip, ub) |
e92a04af BJ |
528 | register struct inode *ip; |
529 | struct stat *ub; | |
d67a03eb | 530 | { |
d67a03eb BJ |
531 | struct stat ds; |
532 | ||
c0bb1685 | 533 | IUPDAT(ip, &time, &time, 0); |
d67a03eb | 534 | /* |
09c42945 | 535 | * Copy from inode table |
d67a03eb BJ |
536 | */ |
537 | ds.st_dev = ip->i_dev; | |
538 | ds.st_ino = ip->i_number; | |
539 | ds.st_mode = ip->i_mode; | |
540 | ds.st_nlink = ip->i_nlink; | |
541 | ds.st_uid = ip->i_uid; | |
542 | ds.st_gid = ip->i_gid; | |
6459ebe0 | 543 | ds.st_rdev = (dev_t)ip->i_rdev; |
a3aa7f92 | 544 | ds.st_size = ip->i_size; |
6459ebe0 KM |
545 | ds.st_atime = ip->i_atime; |
546 | ds.st_mtime = ip->i_mtime; | |
547 | ds.st_ctime = ip->i_ctime; | |
09c42945 | 548 | ds.st_blksize = ip->i_fs->fs_bsize; |
d67a03eb BJ |
549 | if (copyout((caddr_t)&ds, (caddr_t)ub, sizeof(ds)) < 0) |
550 | u.u_error = EFAULT; | |
551 | } | |
552 | ||
553 | /* | |
5485e062 BJ |
554 | * Return target name of a symbolic link |
555 | */ | |
556 | readlink() | |
557 | { | |
558 | register struct inode *ip; | |
559 | register struct a { | |
560 | char *name; | |
561 | char *buf; | |
562 | int count; | |
563 | } *uap; | |
564 | ||
565 | ip = namei(uchar, 0, 0); | |
566 | if (ip == NULL) | |
567 | return; | |
f94ceb3b BJ |
568 | #ifdef EFS |
569 | if (efsinode(ip)) { | |
570 | dev_t ndev = ip->i_rdev; | |
571 | ||
572 | iput(ip); | |
573 | efsreadlink(ndev); | |
574 | if (u.u_error != EEXIST) | |
575 | return; | |
576 | u.u_error = 0; | |
577 | u.u_dirp = (caddr_t)u.u_arg[0]; | |
578 | ip = namei(uchar, 0, 0); | |
579 | return (0); | |
580 | } | |
581 | #endif | |
5485e062 BJ |
582 | if ((ip->i_mode&IFMT) != IFLNK) { |
583 | u.u_error = ENXIO; | |
584 | goto out; | |
585 | } | |
586 | uap = (struct a *)u.u_ap; | |
587 | u.u_offset = 0; | |
588 | u.u_base = uap->buf; | |
589 | u.u_count = uap->count; | |
590 | u.u_segflg = 0; | |
591 | readi(ip); | |
592 | out: | |
593 | iput(ip); | |
594 | u.u_r.r_val1 = uap->count - u.u_count; | |
595 | } | |
596 | ||
3e78e260 | 597 | chmod() |
5485e062 | 598 | { |
3e78e260 | 599 | register struct inode *ip; |
5485e062 | 600 | register struct a { |
3e78e260 BJ |
601 | char *fname; |
602 | int fmode; | |
5485e062 | 603 | } *uap; |
5485e062 BJ |
604 | |
605 | uap = (struct a *)u.u_ap; | |
3e78e260 | 606 | if ((ip = owner(1)) == NULL) |
5485e062 | 607 | return; |
f94ceb3b BJ |
608 | #ifdef EFS |
609 | if (efsinode(ip)) { | |
610 | dev_t ndev = ip->i_rdev; | |
611 | ||
612 | iput(ip); | |
613 | efschmod(ndev); | |
614 | if (u.u_error != EEXIST) | |
615 | return; | |
616 | u.u_error = 0; | |
617 | u.u_dirp = (caddr_t)u.u_arg[0]; | |
618 | ip = owner(1); | |
619 | } | |
620 | #endif | |
3e78e260 | 621 | ip->i_mode &= ~07777; |
f94ceb3b | 622 | if (u.u_uid) { |
3e78e260 | 623 | uap->fmode &= ~ISVTX; |
f94ceb3b BJ |
624 | if (ip->i_gid >= NGRPS || |
625 | (u.u_grps[ip->i_gid/(sizeof(int)*8)] & | |
626 | (1 << ip->i_gid%(sizeof(int)*8))) == 0) | |
627 | uap->fmode &= ~ISGID; | |
0a77f278 RE |
628 | #if MUSH |
629 | if (u.u_quota->q_syflags & QF_UMASK && u.u_uid != 0 && | |
630 | (ip->i_mode & IFMT) != IFCHR) | |
631 | uap->fmode &= ~u.u_cmask; | |
632 | #endif | |
f94ceb3b | 633 | } |
3e78e260 BJ |
634 | ip->i_mode |= uap->fmode&07777; |
635 | ip->i_flag |= ICHG; | |
636 | if (ip->i_flag&ITEXT && (ip->i_mode&ISVTX)==0) | |
637 | xrele(ip); | |
0a77f278 RE |
638 | #ifdef MELB |
639 | if ((ip->i_mode & ISUID) && ip->i_uid == 0) | |
640 | printf("%s: ino %d (%s) setuid root\n" | |
641 | , getfs(ip->i_dev)->s_fsmnt | |
642 | , ip->i_number | |
643 | , u.u_dent.d_name | |
644 | ); | |
645 | #endif | |
5485e062 BJ |
646 | iput(ip); |
647 | } | |
648 | ||
3e78e260 | 649 | chown() |
d67a03eb | 650 | { |
3e78e260 | 651 | register struct inode *ip; |
d67a03eb | 652 | register struct a { |
3e78e260 BJ |
653 | char *fname; |
654 | int uid; | |
655 | int gid; | |
d67a03eb | 656 | } *uap; |
0a77f278 RE |
657 | #if QUOTA |
658 | register long change; | |
659 | #endif | |
d67a03eb BJ |
660 | |
661 | uap = (struct a *)u.u_ap; | |
3e78e260 | 662 | if (!suser() || (ip = owner(0)) == NULL) |
d67a03eb | 663 | return; |
f94ceb3b BJ |
664 | #ifdef EFS |
665 | if (efsinode(ip)) { | |
666 | dev_t ndev = ip->i_rdev; | |
667 | ||
668 | iput(ip); | |
669 | efschown(ndev); | |
670 | if (u.u_error != EEXIST) | |
671 | return; | |
672 | u.u_error = 0; | |
673 | u.u_dirp = (caddr_t)u.u_arg[0]; | |
674 | ip = owner(0); | |
675 | } | |
0a77f278 RE |
676 | #endif |
677 | #if QUOTA | |
678 | /* | |
679 | * This doesn't allow for holes in files (which hopefully don't | |
680 | * happen often in files that we chown), and is not accurate anyway | |
681 | * (eg: it totally ignores 3 level indir blk files - but hopefully | |
682 | * noone who can make a file that big will have a quota) | |
683 | */ | |
684 | if (ip->i_uid == uap->uid) | |
685 | change = 0; | |
686 | else { | |
687 | register struct fs *fs = ip->i_fs; | |
688 | ||
689 | if (ip->i_size > (change = NDADDR * fs->fs_bsize)) { | |
690 | register off_t size; | |
691 | ||
692 | size = blkroundup(fs, ip->i_size) - change; | |
693 | change += size; | |
694 | change += fs->fs_bsize; | |
695 | /* This assumes NIADDR <= 2 */ | |
696 | if (size > NINDIR(fs) * fs->fs_bsize) | |
697 | change += fs->fs_bsize; | |
698 | } else | |
699 | change = fragroundup(fs, ip->i_size); | |
700 | change /= DEV_BSIZE; | |
701 | } | |
702 | chkdq(ip, -change, 1); | |
703 | chkiq(ip->i_dev, ip, ip->i_uid, 1); | |
704 | dqrele(ip->i_dquot); | |
f94ceb3b BJ |
705 | #endif |
706 | /* | |
707 | * keep uid/gid's in sane range - no err, so chown(file, uid, -1) | |
708 | * will do something useful | |
709 | */ | |
710 | if (uap->uid >= 0 && uap->uid <= 32767) /* should have a const */ | |
711 | ip->i_uid = uap->uid; | |
712 | if (uap->gid >= 0 && uap->gid <= 32767) /* same here */ | |
713 | ip->i_gid = uap->gid; | |
3e78e260 BJ |
714 | ip->i_flag |= ICHG; |
715 | if (u.u_ruid != 0) | |
716 | ip->i_mode &= ~(ISUID|ISGID); | |
0a77f278 RE |
717 | #if QUOTA |
718 | ip->i_dquot = inoquota(ip); | |
719 | chkdq(ip, change, 1); | |
720 | chkiq(ip->i_dev, NULL, uap->uid, 1); | |
721 | #endif | |
3e78e260 | 722 | iput(ip); |
d67a03eb BJ |
723 | } |
724 | ||
725 | /* | |
3e78e260 BJ |
726 | * Set IUPD and IACC times on file. |
727 | * Can't set ICHG. | |
d67a03eb | 728 | */ |
3e78e260 | 729 | utime() |
e92a04af | 730 | { |
d67a03eb | 731 | register struct a { |
3e78e260 BJ |
732 | char *fname; |
733 | time_t *tptr; | |
d67a03eb | 734 | } *uap; |
3e78e260 BJ |
735 | register struct inode *ip; |
736 | time_t tv[2]; | |
d67a03eb BJ |
737 | |
738 | uap = (struct a *)u.u_ap; | |
3e78e260 | 739 | if ((ip = owner(1)) == NULL) |
d67a03eb | 740 | return; |
3e78e260 BJ |
741 | if (copyin((caddr_t)uap->tptr, (caddr_t)tv, sizeof(tv))) { |
742 | u.u_error = EFAULT; | |
743 | } else { | |
f94ceb3b BJ |
744 | #ifdef EFS |
745 | if (efsinode(ip)) { | |
746 | dev_t ndev = ip->i_rdev; | |
747 | ||
748 | iput(ip); | |
749 | efsutime(ndev, uap->fname, tv); | |
750 | if (u.u_error != EEXIST) | |
751 | return; | |
752 | u.u_error = 0; | |
753 | u.u_dirp = (caddr_t)u.u_arg[0]; | |
754 | ip = owner(1); | |
755 | } | |
756 | #endif | |
3e78e260 BJ |
757 | ip->i_flag |= IACC|IUPD|ICHG; |
758 | iupdat(ip, &tv[0], &tv[1], 0); | |
d67a03eb | 759 | } |
d67a03eb BJ |
760 | iput(ip); |
761 | } | |
762 | ||
3e78e260 | 763 | sync() |
d67a03eb | 764 | { |
d67a03eb | 765 | |
68503f9a | 766 | update(0); |
d67a03eb | 767 | } |
64d3a787 BJ |
768 | |
769 | /* | |
770 | * Make a new file. | |
771 | */ | |
772 | struct inode * | |
773 | maknode(mode) | |
774 | int mode; | |
775 | { | |
776 | register struct inode *ip; | |
777 | ino_t ipref; | |
778 | ||
779 | if ((mode & IFMT) == IFDIR) | |
780 | ipref = dirpref(u.u_pdir->i_fs); | |
781 | else | |
782 | ipref = u.u_pdir->i_number; | |
783 | ip = ialloc(u.u_pdir, ipref, mode); | |
784 | if (ip == NULL) { | |
785 | iput(u.u_pdir); | |
786 | return(NULL); | |
787 | } | |
788 | #ifdef QUOTA | |
789 | if (ip->i_dquot != NODQUOT) | |
790 | panic("maknode: dquot"); | |
791 | #endif | |
792 | ip->i_flag |= IACC|IUPD|ICHG; | |
793 | if ((mode & IFMT) == 0) | |
794 | mode |= IFREG; | |
795 | ip->i_mode = mode & ~u.u_cmask; | |
796 | ip->i_nlink = 1; | |
797 | ip->i_uid = u.u_uid; | |
798 | ip->i_gid = u.u_pdir->i_gid; | |
799 | #ifdef QUOTA | |
800 | ip->i_dquot = inoquota(ip); | |
801 | #endif | |
802 | ||
803 | /* | |
804 | * Make sure inode goes to disk before directory entry. | |
805 | */ | |
806 | iupdat(ip, &time, &time, 1); | |
807 | direnter(ip); | |
808 | if (u.u_error) { | |
809 | /* | |
810 | * write error occurred trying to update directory | |
811 | * so must deallocate the inode | |
812 | */ | |
813 | ip->i_nlink = 0; | |
814 | ip->i_flag |= ICHG; | |
815 | iput(ip); | |
816 | return(NULL); | |
817 | } | |
818 | return(ip); | |
819 | } |