Commit | Line | Data |
---|---|---|
f45396c3 | 1 | /* ffs_vnops.c 4.39 82/10/17 */ |
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" | |
35e7c31a | 7 | #include "../h/kernel.h" |
d67a03eb | 8 | #include "../h/file.h" |
6459ebe0 | 9 | #include "../h/stat.h" |
3e78e260 | 10 | #include "../h/inode.h" |
6459ebe0 | 11 | #include "../h/fs.h" |
3e78e260 | 12 | #include "../h/buf.h" |
3e78e260 | 13 | #include "../h/proc.h" |
0a77f278 | 14 | #include "../h/quota.h" |
4147b3f6 | 15 | #include "../h/descrip.h" |
31949305 BJ |
16 | #include "../h/uio.h" |
17 | #include "../h/socket.h" | |
3e78e260 BJ |
18 | |
19 | chdir() | |
20 | { | |
21 | ||
22 | chdirec(&u.u_cdir); | |
23 | } | |
24 | ||
25 | chroot() | |
26 | { | |
27 | ||
28 | if (suser()) | |
29 | chdirec(&u.u_rdir); | |
30 | } | |
31 | ||
32 | chdirec(ipp) | |
528f664c | 33 | register struct inode **ipp; |
3e78e260 BJ |
34 | { |
35 | register struct inode *ip; | |
36 | struct a { | |
37 | char *fname; | |
38 | }; | |
39 | ||
40 | ip = namei(uchar, 0, 1); | |
41 | if(ip == NULL) | |
42 | return; | |
43 | if((ip->i_mode&IFMT) != IFDIR) { | |
44 | u.u_error = ENOTDIR; | |
45 | goto bad; | |
46 | } | |
47 | if(access(ip, IEXEC)) | |
48 | goto bad; | |
ca91bded | 49 | iunlock(ip); |
8eee8525 KM |
50 | if (*ipp) |
51 | irele(*ipp); | |
3e78e260 BJ |
52 | *ipp = ip; |
53 | return; | |
54 | ||
55 | bad: | |
56 | iput(ip); | |
57 | } | |
58 | ||
59 | /* | |
60 | * Open system call. | |
61 | */ | |
62 | open() | |
63 | { | |
64 | register struct inode *ip; | |
65 | register struct a { | |
66 | char *fname; | |
528f664c SL |
67 | int flags; |
68 | int mode; | |
3e78e260 | 69 | } *uap; |
528f664c | 70 | int checkpermissions = 1; |
3e78e260 BJ |
71 | |
72 | uap = (struct a *)u.u_ap; | |
528f664c SL |
73 | if (uap->flags&FCREATE) { |
74 | ip = namei(uchar, 1, 1); | |
75 | if (ip == NULL) { | |
76 | if (u.u_error) | |
77 | return; | |
78 | ip = maknode(uap->mode&07777&(~ISVTX)); | |
79 | checkpermissions = 0; | |
80 | uap->flags &= ~FTRUNCATE; | |
81 | } | |
82 | } else | |
83 | ip = namei(uchar, 0, 1); | |
3e78e260 BJ |
84 | if (ip == NULL) |
85 | return; | |
528f664c | 86 | open1(ip, ++uap->flags, checkpermissions); |
3e78e260 BJ |
87 | } |
88 | ||
528f664c | 89 | #ifndef NOCOMPAT |
3e78e260 BJ |
90 | /* |
91 | * Creat system call. | |
92 | */ | |
4147b3f6 | 93 | ocreat() |
3e78e260 BJ |
94 | { |
95 | register struct inode *ip; | |
96 | register struct a { | |
97 | char *fname; | |
98 | int fmode; | |
99 | } *uap; | |
100 | ||
101 | uap = (struct a *)u.u_ap; | |
102 | ip = namei(uchar, 1, 1); | |
103 | if (ip == NULL) { | |
104 | if (u.u_error) | |
105 | return; | |
106 | ip = maknode(uap->fmode&07777&(~ISVTX)); | |
528f664c | 107 | if (ip == NULL) |
3e78e260 | 108 | return; |
528f664c | 109 | open1(ip, FWRITE, 0); |
3e78e260 | 110 | } else |
528f664c | 111 | open1(ip, FWRITE|FTRUNCATE, 0); |
3e78e260 | 112 | } |
528f664c | 113 | #endif |
3e78e260 BJ |
114 | |
115 | /* | |
116 | * Common code for open and creat. | |
528f664c SL |
117 | * Check permissions (if we haven't done so already), |
118 | * allocate an open file structure, and call | |
119 | * the device open routine, if any. | |
3e78e260 | 120 | */ |
528f664c | 121 | open1(ip, mode, checkpermissions) |
3e78e260 BJ |
122 | register struct inode *ip; |
123 | register mode; | |
124 | { | |
125 | register struct file *fp; | |
528f664c | 126 | int i, flags; |
3e78e260 | 127 | |
528f664c | 128 | if (checkpermissions) { |
3e78e260 | 129 | if (mode&FREAD) |
528f664c SL |
130 | if (access(ip, IREAD)) |
131 | goto bad; | |
3e78e260 | 132 | if (mode&FWRITE) { |
528f664c SL |
133 | if (access(ip, IWRITE)) |
134 | goto bad; | |
135 | if ((ip->i_mode&IFMT) == IFDIR) { | |
3e78e260 | 136 | u.u_error = EISDIR; |
528f664c SL |
137 | goto bad; |
138 | } | |
3e78e260 BJ |
139 | } |
140 | } | |
528f664c SL |
141 | |
142 | /* | |
143 | * Check locking on inode. Release "inode lock" | |
144 | * while doing so in case we block inside flocki. | |
145 | */ | |
146 | flags = 0; | |
147 | if (mode&(FRDLOCK|FWRLOCK)) { | |
148 | iunlock(ip); | |
149 | flags = flocki(ip, 0, mode); | |
150 | ilock(ip); | |
151 | if (u.u_error) | |
152 | goto bad; | |
8eee8525 | 153 | } |
528f664c SL |
154 | if (mode&FTRUNCATE) |
155 | itrunc(ip, 0); | |
ca91bded | 156 | iunlock(ip); |
3e78e260 BJ |
157 | if ((fp = falloc()) == NULL) |
158 | goto out; | |
528f664c | 159 | fp->f_flag = mode & FMODES; |
4147b3f6 | 160 | fp->f_type = DTYPE_FILE; |
3e78e260 BJ |
161 | i = u.u_r.r_val1; |
162 | fp->f_inode = ip; | |
f45396c3 | 163 | u.u_error = openi(ip, mode); |
528f664c SL |
164 | if (u.u_error == 0) { |
165 | u.u_pofile[i] = flags; | |
3e78e260 | 166 | return; |
528f664c | 167 | } |
3e78e260 BJ |
168 | u.u_ofile[i] = NULL; |
169 | fp->f_count--; | |
170 | out: | |
8eee8525 | 171 | irele(ip); |
528f664c SL |
172 | return; |
173 | bad: | |
174 | iput(ip); | |
3e78e260 BJ |
175 | } |
176 | ||
177 | /* | |
178 | * Mknod system call | |
179 | */ | |
180 | mknod() | |
181 | { | |
182 | register struct inode *ip; | |
183 | register struct a { | |
184 | char *fname; | |
185 | int fmode; | |
186 | int dev; | |
187 | } *uap; | |
188 | ||
189 | uap = (struct a *)u.u_ap; | |
190 | if (suser()) { | |
191 | ip = namei(uchar, 1, 0); | |
192 | if (ip != NULL) { | |
193 | u.u_error = EEXIST; | |
194 | goto out; | |
195 | } | |
196 | } | |
197 | if (u.u_error) | |
198 | return; | |
199 | ip = maknode(uap->fmode); | |
200 | if (ip == NULL) | |
201 | return; | |
202 | if (uap->dev) { | |
203 | /* | |
204 | * Want to be able to use this to make badblock | |
205 | * inodes, so don't truncate the dev number. | |
206 | */ | |
6459ebe0 | 207 | ip->i_rdev = uap->dev; |
3e78e260 BJ |
208 | ip->i_flag |= IACC|IUPD|ICHG; |
209 | } | |
210 | ||
211 | out: | |
212 | iput(ip); | |
213 | } | |
214 | ||
215 | /* | |
216 | * link system call | |
217 | */ | |
218 | link() | |
219 | { | |
220 | register struct inode *ip, *xp; | |
221 | register struct a { | |
222 | char *target; | |
223 | char *linkname; | |
224 | } *uap; | |
225 | ||
226 | uap = (struct a *)u.u_ap; | |
227 | ip = namei(uchar, 0, 1); /* well, this routine is doomed anyhow */ | |
228 | if (ip == NULL) | |
229 | return; | |
f94ceb3b BJ |
230 | if ((ip->i_mode&IFMT)==IFDIR && !suser()) { |
231 | iput(ip); | |
232 | return; | |
233 | } | |
3e78e260 BJ |
234 | ip->i_nlink++; |
235 | ip->i_flag |= ICHG; | |
35e7c31a | 236 | iupdat(ip, &time.tv_sec, &time.tv_sec, 1); |
ca91bded | 237 | iunlock(ip); |
3e78e260 BJ |
238 | u.u_dirp = (caddr_t)uap->linkname; |
239 | xp = namei(uchar, 1, 0); | |
240 | if (xp != NULL) { | |
241 | u.u_error = EEXIST; | |
242 | iput(xp); | |
243 | goto out; | |
244 | } | |
245 | if (u.u_error) | |
246 | goto out; | |
247 | if (u.u_pdir->i_dev != ip->i_dev) { | |
248 | iput(u.u_pdir); | |
249 | u.u_error = EXDEV; | |
250 | goto out; | |
251 | } | |
64d3a787 | 252 | direnter(ip); |
3e78e260 BJ |
253 | out: |
254 | if (u.u_error) { | |
255 | ip->i_nlink--; | |
256 | ip->i_flag |= ICHG; | |
257 | } | |
8eee8525 | 258 | irele(ip); |
3e78e260 BJ |
259 | } |
260 | ||
261 | /* | |
262 | * symlink -- make a symbolic link | |
263 | */ | |
264 | symlink() | |
265 | { | |
266 | register struct a { | |
267 | char *target; | |
268 | char *linkname; | |
269 | } *uap; | |
270 | register struct inode *ip; | |
271 | register char *tp; | |
272 | register c, nc; | |
273 | ||
274 | uap = (struct a *)u.u_ap; | |
275 | tp = uap->target; | |
276 | nc = 0; | |
277 | while (c = fubyte(tp)) { | |
278 | if (c < 0) { | |
279 | u.u_error = EFAULT; | |
280 | return; | |
281 | } | |
282 | tp++; | |
283 | nc++; | |
284 | } | |
285 | u.u_dirp = uap->linkname; | |
286 | ip = namei(uchar, 1, 0); | |
287 | if (ip) { | |
288 | iput(ip); | |
289 | u.u_error = EEXIST; | |
290 | return; | |
291 | } | |
292 | if (u.u_error) | |
293 | return; | |
294 | ip = maknode(IFLNK | 0777); | |
295 | if (ip == NULL) | |
296 | return; | |
31949305 | 297 | u.u_error = rdwri(UIO_WRITE, ip, uap->target, nc, 0, 0, (int *)0); |
3e78e260 BJ |
298 | iput(ip); |
299 | } | |
300 | ||
301 | /* | |
302 | * Unlink system call. | |
303 | * Hard to avoid races here, especially | |
304 | * in unlinking directories. | |
305 | */ | |
306 | unlink() | |
307 | { | |
308 | register struct inode *ip, *pp; | |
309 | struct a { | |
310 | char *fname; | |
311 | }; | |
8eee8525 | 312 | int unlinkingdot = 0; |
3e78e260 BJ |
313 | |
314 | pp = namei(uchar, 2, 0); | |
64d3a787 | 315 | if (pp == NULL) |
3e78e260 | 316 | return; |
f94ceb3b | 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 | */ | |
35e7c31a | 357 | lseek() |
3e78e260 BJ |
358 | { |
359 | register struct file *fp; | |
360 | register struct a { | |
528f664c | 361 | int fd; |
3e78e260 BJ |
362 | off_t off; |
363 | int sbase; | |
364 | } *uap; | |
365 | ||
366 | uap = (struct a *)u.u_ap; | |
528f664c | 367 | fp = getf(uap->fd); |
3e78e260 BJ |
368 | if (fp == NULL) |
369 | return; | |
4147b3f6 | 370 | if (fp->f_type == DTYPE_SOCKET) { |
3e78e260 BJ |
371 | u.u_error = ESPIPE; |
372 | return; | |
373 | } | |
528f664c | 374 | if (uap->sbase == FSEEK_RELATIVE) |
3e78e260 | 375 | uap->off += fp->f_offset; |
528f664c | 376 | else if (uap->sbase == FSEEK_EOF) |
3e78e260 BJ |
377 | uap->off += fp->f_inode->i_size; |
378 | fp->f_offset = uap->off; | |
379 | u.u_r.r_off = uap->off; | |
380 | } | |
381 | ||
382 | /* | |
383 | * Access system call | |
384 | */ | |
385 | saccess() | |
386 | { | |
387 | register svuid, svgid; | |
388 | register struct inode *ip; | |
389 | register struct a { | |
390 | char *fname; | |
391 | int fmode; | |
392 | } *uap; | |
393 | ||
394 | uap = (struct a *)u.u_ap; | |
395 | svuid = u.u_uid; | |
396 | svgid = u.u_gid; | |
397 | u.u_uid = u.u_ruid; | |
398 | u.u_gid = u.u_rgid; | |
399 | ip = namei(uchar, 0, 1); | |
400 | if (ip != NULL) { | |
528f664c SL |
401 | if (uap->fmode&FACCESS_READ && access(ip, IREAD)) |
402 | goto done; | |
403 | if (uap->fmode&FACCESS_WRITE && access(ip, IWRITE)) | |
404 | goto done; | |
405 | if (uap->fmode&FACCESS_EXECUTE && access(ip, IEXEC)) | |
406 | goto done; | |
407 | done: | |
3e78e260 BJ |
408 | iput(ip); |
409 | } | |
410 | u.u_uid = svuid; | |
411 | u.u_gid = svgid; | |
412 | } | |
d67a03eb BJ |
413 | |
414 | /* | |
415 | * the fstat system call. | |
416 | */ | |
417 | fstat() | |
418 | { | |
419 | register struct file *fp; | |
420 | register struct a { | |
528f664c | 421 | int fd; |
d67a03eb BJ |
422 | struct stat *sb; |
423 | } *uap; | |
424 | ||
425 | uap = (struct a *)u.u_ap; | |
528f664c | 426 | fp = getf(uap->fd); |
e92a04af | 427 | if (fp == NULL) |
d67a03eb | 428 | return; |
4147b3f6 | 429 | if (fp->f_type == DTYPE_SOCKET) |
cc15ab5d | 430 | u.u_error = sostat(fp->f_socket, uap->sb); |
e92a04af BJ |
431 | else |
432 | stat1(fp->f_inode, uap->sb); | |
d67a03eb BJ |
433 | } |
434 | ||
435 | /* | |
6459ebe0 | 436 | * Stat system call. This version follows links. |
d67a03eb BJ |
437 | */ |
438 | stat() | |
439 | { | |
440 | register struct inode *ip; | |
441 | register struct a { | |
442 | char *fname; | |
443 | struct stat *sb; | |
444 | } *uap; | |
445 | ||
446 | uap = (struct a *)u.u_ap; | |
66d4ba1b | 447 | ip = namei(uchar, 0, 1); |
e92a04af | 448 | if (ip == NULL) |
d67a03eb | 449 | return; |
a3aa7f92 | 450 | stat1(ip, uap->sb); |
d67a03eb BJ |
451 | iput(ip); |
452 | } | |
453 | ||
5485e062 | 454 | /* |
6459ebe0 | 455 | * Lstat system call. This version does not follow links. |
5485e062 BJ |
456 | */ |
457 | lstat() | |
458 | { | |
459 | register struct inode *ip; | |
460 | register struct a { | |
461 | char *fname; | |
462 | struct stat *sb; | |
463 | } *uap; | |
464 | ||
465 | uap = (struct a *)u.u_ap; | |
66d4ba1b | 466 | ip = namei(uchar, 0, 0); |
5485e062 BJ |
467 | if (ip == NULL) |
468 | return; | |
019b08c9 | 469 | stat1(ip, uap->sb); |
5485e062 BJ |
470 | iput(ip); |
471 | } | |
472 | ||
d67a03eb BJ |
473 | /* |
474 | * The basic routine for fstat and stat: | |
475 | * get the inode and pass appropriate parts back. | |
476 | */ | |
a3aa7f92 | 477 | stat1(ip, ub) |
e92a04af BJ |
478 | register struct inode *ip; |
479 | struct stat *ub; | |
d67a03eb | 480 | { |
d67a03eb BJ |
481 | struct stat ds; |
482 | ||
35e7c31a | 483 | IUPDAT(ip, &time.tv_sec, &time.tv_sec, 0); |
d67a03eb | 484 | /* |
09c42945 | 485 | * Copy from inode table |
d67a03eb BJ |
486 | */ |
487 | ds.st_dev = ip->i_dev; | |
488 | ds.st_ino = ip->i_number; | |
489 | ds.st_mode = ip->i_mode; | |
490 | ds.st_nlink = ip->i_nlink; | |
491 | ds.st_uid = ip->i_uid; | |
492 | ds.st_gid = ip->i_gid; | |
6459ebe0 | 493 | ds.st_rdev = (dev_t)ip->i_rdev; |
a3aa7f92 | 494 | ds.st_size = ip->i_size; |
6459ebe0 KM |
495 | ds.st_atime = ip->i_atime; |
496 | ds.st_mtime = ip->i_mtime; | |
497 | ds.st_ctime = ip->i_ctime; | |
528f664c SL |
498 | /* this doesn't belong here */ |
499 | if ((ip->i_mode&IFMT) == IFBLK) | |
500 | ds.st_blksize = BLKDEV_IOSIZE; | |
501 | else if ((ip->i_mode&IFMT) == IFCHR) | |
502 | ds.st_blksize = MAXBSIZE; | |
503 | else | |
504 | ds.st_blksize = ip->i_fs->fs_bsize; | |
d67a03eb BJ |
505 | if (copyout((caddr_t)&ds, (caddr_t)ub, sizeof(ds)) < 0) |
506 | u.u_error = EFAULT; | |
507 | } | |
508 | ||
509 | /* | |
5485e062 BJ |
510 | * Return target name of a symbolic link |
511 | */ | |
512 | readlink() | |
513 | { | |
514 | register struct inode *ip; | |
515 | register struct a { | |
516 | char *name; | |
517 | char *buf; | |
518 | int count; | |
31949305 BJ |
519 | } *uap = (struct a *)u.u_ap; |
520 | int resid; | |
5485e062 BJ |
521 | |
522 | ip = namei(uchar, 0, 0); | |
523 | if (ip == NULL) | |
524 | return; | |
525 | if ((ip->i_mode&IFMT) != IFLNK) { | |
526 | u.u_error = ENXIO; | |
527 | goto out; | |
528 | } | |
31949305 | 529 | u.u_error = rdwri(UIO_READ, ip, uap->buf, uap->count, 0, 0, &resid); |
5485e062 BJ |
530 | out: |
531 | iput(ip); | |
31949305 | 532 | u.u_r.r_val1 = uap->count - resid; |
5485e062 BJ |
533 | } |
534 | ||
3e78e260 | 535 | chmod() |
5485e062 | 536 | { |
528f664c SL |
537 | struct inode *ip; |
538 | struct a { | |
3e78e260 BJ |
539 | char *fname; |
540 | int fmode; | |
5485e062 | 541 | } *uap; |
5485e062 BJ |
542 | |
543 | uap = (struct a *)u.u_ap; | |
3e78e260 | 544 | if ((ip = owner(1)) == NULL) |
5485e062 | 545 | return; |
528f664c SL |
546 | chmod1(ip, uap->fmode); |
547 | } | |
f94ceb3b | 548 | |
528f664c SL |
549 | fchmod() |
550 | { | |
551 | struct a { | |
552 | int fd; | |
553 | int fmode; | |
554 | } *uap; | |
555 | register struct inode *ip; | |
556 | register struct file *fp; | |
557 | ||
558 | uap = (struct a *)u.u_ap; | |
559 | fp = getf(uap->fd); | |
560 | if (fp == NULL) | |
561 | return; | |
562 | if (fp->f_type == DTYPE_SOCKET) { | |
563 | u.u_error = EINVAL; | |
564 | return; | |
f94ceb3b | 565 | } |
528f664c SL |
566 | ip = fp->f_inode; |
567 | ilock(ip); | |
568 | if (u.u_uid != ip->i_uid && !suser()) { | |
569 | iunlock(ip); | |
570 | return; | |
571 | } | |
572 | chmod1(ip, uap->fmode); | |
573 | } | |
574 | ||
575 | chmod1(ip, mode) | |
576 | register struct inode *ip; | |
577 | register int mode; | |
578 | { | |
197da11b BJ |
579 | register int *gp; |
580 | ||
3e78e260 | 581 | ip->i_mode &= ~07777; |
f94ceb3b | 582 | if (u.u_uid) { |
528f664c | 583 | mode &= ~ISVTX; |
197da11b BJ |
584 | for (gp = u.u_groups; gp < &u.u_groups[NGROUPS]; gp++) |
585 | if (*gp == ip->i_gid) | |
586 | goto ok; | |
587 | mode &= ~ISGID; | |
588 | ok: | |
589 | ; | |
528f664c | 590 | #ifdef MUSH |
0a77f278 RE |
591 | if (u.u_quota->q_syflags & QF_UMASK && u.u_uid != 0 && |
592 | (ip->i_mode & IFMT) != IFCHR) | |
528f664c | 593 | mode &= ~u.u_cmask; |
0a77f278 | 594 | #endif |
f94ceb3b | 595 | } |
528f664c | 596 | ip->i_mode |= mode&07777; |
3e78e260 BJ |
597 | ip->i_flag |= ICHG; |
598 | if (ip->i_flag&ITEXT && (ip->i_mode&ISVTX)==0) | |
599 | xrele(ip); | |
5485e062 BJ |
600 | iput(ip); |
601 | } | |
602 | ||
3e78e260 | 603 | chown() |
d67a03eb | 604 | { |
528f664c SL |
605 | struct inode *ip; |
606 | struct a { | |
3e78e260 BJ |
607 | char *fname; |
608 | int uid; | |
609 | int gid; | |
d67a03eb | 610 | } *uap; |
d67a03eb BJ |
611 | |
612 | uap = (struct a *)u.u_ap; | |
3e78e260 | 613 | if (!suser() || (ip = owner(0)) == NULL) |
d67a03eb | 614 | return; |
528f664c SL |
615 | chown1(ip, uap->uid, uap->gid); |
616 | } | |
f94ceb3b | 617 | |
528f664c SL |
618 | fchown() |
619 | { | |
620 | struct a { | |
621 | int fd; | |
622 | int uid; | |
623 | int gid; | |
624 | } *uap; | |
625 | register struct inode *ip; | |
626 | register struct file *fp; | |
627 | ||
628 | uap = (struct a *)u.u_ap; | |
629 | fp = getf(uap->fd); | |
630 | if (fp == NULL) | |
631 | return; | |
632 | if (fp->f_type == DTYPE_SOCKET) { | |
633 | u.u_error = EINVAL; | |
634 | return; | |
f94ceb3b | 635 | } |
528f664c SL |
636 | ip = fp->f_inode; |
637 | ilock(ip); | |
638 | if (!suser()) { | |
639 | iunlock(ip); | |
640 | return; | |
641 | } | |
642 | chown1(ip, uap->uid, uap->gid); | |
643 | } | |
644 | ||
645 | /* | |
646 | * Perform chown operation on inode ip; | |
647 | * inode must be locked prior to call. | |
648 | */ | |
649 | chown1(ip, uid, gid) | |
650 | register struct inode *ip; | |
651 | int uid, gid; | |
652 | { | |
653 | #ifdef QUOTA | |
654 | register long change; | |
655 | ||
0a77f278 RE |
656 | /* |
657 | * This doesn't allow for holes in files (which hopefully don't | |
658 | * happen often in files that we chown), and is not accurate anyway | |
659 | * (eg: it totally ignores 3 level indir blk files - but hopefully | |
660 | * noone who can make a file that big will have a quota) | |
661 | */ | |
528f664c | 662 | if (ip->i_uid == uid) |
0a77f278 RE |
663 | change = 0; |
664 | else { | |
665 | register struct fs *fs = ip->i_fs; | |
666 | ||
667 | if (ip->i_size > (change = NDADDR * fs->fs_bsize)) { | |
668 | register off_t size; | |
669 | ||
670 | size = blkroundup(fs, ip->i_size) - change; | |
671 | change += size; | |
672 | change += fs->fs_bsize; | |
528f664c | 673 | /* this assumes NIADDR <= 2 */ |
0a77f278 RE |
674 | if (size > NINDIR(fs) * fs->fs_bsize) |
675 | change += fs->fs_bsize; | |
676 | } else | |
677 | change = fragroundup(fs, ip->i_size); | |
678 | change /= DEV_BSIZE; | |
679 | } | |
680 | chkdq(ip, -change, 1); | |
681 | chkiq(ip->i_dev, ip, ip->i_uid, 1); | |
682 | dqrele(ip->i_dquot); | |
f94ceb3b BJ |
683 | #endif |
684 | /* | |
528f664c SL |
685 | * keep uid/gid's in sane range -- no err, |
686 | * so chown(file, uid, -1) will do something useful | |
f94ceb3b | 687 | */ |
528f664c SL |
688 | if (uid >= 0 && uid <= 32767) /* should have a constant */ |
689 | ip->i_uid = uid; | |
690 | if (gid >= 0 && gid <= 32767) /* same here */ | |
691 | ip->i_gid = gid; | |
3e78e260 BJ |
692 | ip->i_flag |= ICHG; |
693 | if (u.u_ruid != 0) | |
694 | ip->i_mode &= ~(ISUID|ISGID); | |
528f664c | 695 | #ifdef QUOTA |
0a77f278 RE |
696 | ip->i_dquot = inoquota(ip); |
697 | chkdq(ip, change, 1); | |
528f664c | 698 | chkiq(ip->i_dev, NULL, uid, 1); |
0a77f278 | 699 | #endif |
3e78e260 | 700 | iput(ip); |
d67a03eb BJ |
701 | } |
702 | ||
703 | /* | |
3e78e260 BJ |
704 | * Set IUPD and IACC times on file. |
705 | * Can't set ICHG. | |
d67a03eb | 706 | */ |
68da6a91 | 707 | outime() |
e92a04af | 708 | { |
d67a03eb | 709 | register struct a { |
3e78e260 BJ |
710 | char *fname; |
711 | time_t *tptr; | |
d67a03eb | 712 | } *uap; |
3e78e260 BJ |
713 | register struct inode *ip; |
714 | time_t tv[2]; | |
d67a03eb BJ |
715 | |
716 | uap = (struct a *)u.u_ap; | |
3e78e260 | 717 | if ((ip = owner(1)) == NULL) |
d67a03eb | 718 | return; |
3e78e260 BJ |
719 | if (copyin((caddr_t)uap->tptr, (caddr_t)tv, sizeof(tv))) { |
720 | u.u_error = EFAULT; | |
721 | } else { | |
722 | ip->i_flag |= IACC|IUPD|ICHG; | |
723 | iupdat(ip, &tv[0], &tv[1], 0); | |
d67a03eb | 724 | } |
d67a03eb BJ |
725 | iput(ip); |
726 | } | |
727 | ||
3e78e260 | 728 | sync() |
d67a03eb | 729 | { |
d67a03eb | 730 | |
68503f9a | 731 | update(0); |
d67a03eb | 732 | } |
64d3a787 | 733 | |
528f664c SL |
734 | flock() |
735 | { | |
736 | struct a { | |
737 | int fd; | |
738 | int how; | |
739 | } *uap; | |
740 | register struct file *fp; | |
741 | register int cmd, flags; | |
742 | ||
743 | uap = (struct a *)u.u_ap; | |
744 | fp = getf(uap->fd); | |
745 | if (fp == NULL) | |
746 | return; | |
747 | if (fp->f_type == DTYPE_SOCKET) { /* XXX */ | |
748 | u.u_error = EINVAL; | |
749 | return; | |
750 | } | |
751 | cmd = uap->how; | |
752 | flags = u.u_pofile[uap->fd] & (RDLOCK|WRLOCK); | |
753 | if (cmd&FUNLOCK) { | |
754 | if (flags == 0) { | |
755 | u.u_error = EINVAL; | |
756 | return; | |
757 | } | |
758 | funlocki(fp->f_inode, flags); | |
759 | u.u_pofile[uap->fd] &= ~(RDLOCK|WRLOCK); | |
760 | return; | |
761 | } | |
762 | /* | |
763 | * No reason to write lock a file we've already | |
764 | * write locked, similarly with a read lock. | |
765 | */ | |
766 | if ((flags&WRLOCK) && (cmd&FWRLOCK) || | |
767 | (flags&RDLOCK) && (cmd&FRDLOCK)) | |
768 | return; | |
769 | u.u_pofile[uap->fd] = flocki(fp->f_inode, u.u_pofile[uap->fd], cmd); | |
770 | } | |
771 | ||
772 | truncate() | |
773 | { | |
774 | struct a { | |
775 | char *fname; | |
776 | int length; | |
31949305 | 777 | } *uap = (struct a *)u.u_ap; |
528f664c SL |
778 | struct inode *ip; |
779 | ||
780 | ip = namei(uchar, 0, 1); | |
781 | if (ip == NULL) | |
782 | return; | |
783 | if (access(ip, IWRITE)) | |
784 | goto bad; | |
785 | if ((ip->i_mode&IFMT) == IFDIR) { | |
786 | u.u_error = EISDIR; | |
787 | goto bad; | |
788 | } | |
789 | itrunc(ip, uap->length); | |
790 | return; | |
791 | bad: | |
792 | iput(ip); | |
793 | } | |
794 | ||
795 | ftruncate() | |
796 | { | |
797 | struct a { | |
798 | int fd; | |
799 | int length; | |
31949305 | 800 | } *uap = (struct a *)u.u_ap; |
528f664c SL |
801 | struct inode *ip; |
802 | struct file *fp; | |
803 | ||
804 | fp = getf(uap->fd); | |
805 | if (fp == NULL) | |
806 | return; | |
807 | if (fp->f_type == DTYPE_SOCKET) { | |
808 | u.u_error = EINVAL; | |
809 | return; | |
810 | } | |
811 | if ((fp->f_flag&FWRITE) == 0) { | |
812 | u.u_error = EINVAL; | |
813 | return; | |
814 | } | |
815 | ip = fp->f_inode; | |
816 | ilock(ip); | |
817 | itrunc(ip, uap->length); | |
818 | } | |
819 | ||
820 | rename() | |
821 | { | |
31949305 | 822 | #ifdef notdef |
528f664c SL |
823 | struct a { |
824 | char *from; | |
825 | char *to; | |
826 | } *uap; | |
31949305 | 827 | #endif |
528f664c SL |
828 | |
829 | } | |
830 | ||
64d3a787 BJ |
831 | /* |
832 | * Make a new file. | |
833 | */ | |
834 | struct inode * | |
835 | maknode(mode) | |
836 | int mode; | |
837 | { | |
838 | register struct inode *ip; | |
839 | ino_t ipref; | |
840 | ||
841 | if ((mode & IFMT) == IFDIR) | |
842 | ipref = dirpref(u.u_pdir->i_fs); | |
843 | else | |
844 | ipref = u.u_pdir->i_number; | |
845 | ip = ialloc(u.u_pdir, ipref, mode); | |
846 | if (ip == NULL) { | |
847 | iput(u.u_pdir); | |
528f664c | 848 | return (NULL); |
64d3a787 | 849 | } |
528f664c | 850 | #ifdef QUOTA |
64d3a787 BJ |
851 | if (ip->i_dquot != NODQUOT) |
852 | panic("maknode: dquot"); | |
853 | #endif | |
854 | ip->i_flag |= IACC|IUPD|ICHG; | |
855 | if ((mode & IFMT) == 0) | |
856 | mode |= IFREG; | |
857 | ip->i_mode = mode & ~u.u_cmask; | |
858 | ip->i_nlink = 1; | |
859 | ip->i_uid = u.u_uid; | |
860 | ip->i_gid = u.u_pdir->i_gid; | |
528f664c | 861 | #ifdef QUOTA |
64d3a787 BJ |
862 | ip->i_dquot = inoquota(ip); |
863 | #endif | |
864 | ||
865 | /* | |
866 | * Make sure inode goes to disk before directory entry. | |
867 | */ | |
35e7c31a | 868 | iupdat(ip, &time.tv_sec, &time.tv_sec, 1); |
64d3a787 BJ |
869 | direnter(ip); |
870 | if (u.u_error) { | |
871 | /* | |
872 | * write error occurred trying to update directory | |
873 | * so must deallocate the inode | |
874 | */ | |
875 | ip->i_nlink = 0; | |
876 | ip->i_flag |= ICHG; | |
877 | iput(ip); | |
528f664c | 878 | return (NULL); |
64d3a787 | 879 | } |
528f664c | 880 | return (ip); |
64d3a787 | 881 | } |