Commit | Line | Data |
---|---|---|
8462a185 | 1 | /* ffs_vnops.c 6.6 84/05/24 */ |
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" |
31949305 BJ |
15 | #include "../h/uio.h" |
16 | #include "../h/socket.h" | |
b32450f4 | 17 | #include "../h/socketvar.h" |
4f083fd7 | 18 | #include "../h/nami.h" |
88a7a62a SL |
19 | #include "../h/mount.h" |
20 | ||
21 | extern struct fileops inodeops; | |
22 | struct file *getinode(); | |
3e78e260 | 23 | |
4f083fd7 SL |
24 | /* |
25 | * Change current working directory (``.''). | |
26 | */ | |
3e78e260 BJ |
27 | chdir() |
28 | { | |
29 | ||
30 | chdirec(&u.u_cdir); | |
31 | } | |
32 | ||
4f083fd7 SL |
33 | /* |
34 | * Change notion of root (``/'') directory. | |
35 | */ | |
3e78e260 BJ |
36 | chroot() |
37 | { | |
38 | ||
39 | if (suser()) | |
40 | chdirec(&u.u_rdir); | |
41 | } | |
42 | ||
4f083fd7 SL |
43 | /* |
44 | * Common routine for chroot and chdir. | |
45 | */ | |
3e78e260 | 46 | chdirec(ipp) |
528f664c | 47 | register struct inode **ipp; |
3e78e260 BJ |
48 | { |
49 | register struct inode *ip; | |
50 | struct a { | |
51 | char *fname; | |
52 | }; | |
53 | ||
4f083fd7 SL |
54 | ip = namei(uchar, LOOKUP, 1); |
55 | if (ip == NULL) | |
3e78e260 | 56 | return; |
4f083fd7 | 57 | if ((ip->i_mode&IFMT) != IFDIR) { |
3e78e260 BJ |
58 | u.u_error = ENOTDIR; |
59 | goto bad; | |
60 | } | |
4f083fd7 | 61 | if (access(ip, IEXEC)) |
3e78e260 | 62 | goto bad; |
ca91bded | 63 | iunlock(ip); |
8eee8525 KM |
64 | if (*ipp) |
65 | irele(*ipp); | |
3e78e260 BJ |
66 | *ipp = ip; |
67 | return; | |
68 | ||
69 | bad: | |
70 | iput(ip); | |
71 | } | |
72 | ||
73 | /* | |
74 | * Open system call. | |
75 | */ | |
76 | open() | |
77 | { | |
88a7a62a | 78 | struct a { |
3e78e260 | 79 | char *fname; |
528f664c | 80 | int mode; |
88a7a62a SL |
81 | int crtmode; |
82 | } *uap = (struct a *) u.u_ap; | |
3e78e260 | 83 | |
88a7a62a | 84 | copen(uap->mode-FOPEN, uap->crtmode); |
3e78e260 BJ |
85 | } |
86 | ||
87 | /* | |
88 | * Creat system call. | |
89 | */ | |
88a7a62a | 90 | creat() |
3e78e260 | 91 | { |
88a7a62a | 92 | struct a { |
3e78e260 BJ |
93 | char *fname; |
94 | int fmode; | |
88a7a62a | 95 | } *uap = (struct a *)u.u_ap; |
3e78e260 | 96 | |
88a7a62a | 97 | copen(FWRITE|FCREAT|FTRUNC, uap->fmode); |
3e78e260 BJ |
98 | } |
99 | ||
100 | /* | |
101 | * Common code for open and creat. | |
88a7a62a SL |
102 | * Check permissions, allocate an open file structure, |
103 | * and call the device open routine if any. | |
3e78e260 | 104 | */ |
88a7a62a SL |
105 | copen(mode, arg) |
106 | register int mode; | |
107 | int arg; | |
3e78e260 | 108 | { |
88a7a62a | 109 | register struct inode *ip; |
3e78e260 | 110 | register struct file *fp; |
88a7a62a | 111 | int i; |
3e78e260 | 112 | |
88a7a62a SL |
113 | #ifdef notdef |
114 | if ((mode&(FREAD|FWRITE)) == 0) { | |
115 | u.u_error = EINVAL; | |
116 | return; | |
117 | } | |
118 | #endif | |
119 | if (mode&FCREAT) { | |
120 | ip = namei(uchar, CREATE, 1); | |
121 | if (ip == NULL) { | |
122 | if (u.u_error) | |
123 | return; | |
124 | ip = maknode(arg&07777&(~ISVTX)); | |
125 | if (ip == NULL) | |
126 | return; | |
127 | mode &= ~FTRUNC; | |
128 | } else { | |
129 | if (mode&FEXCL) { | |
130 | u.u_error = EEXIST; | |
131 | iput(ip); | |
132 | return; | |
133 | } | |
134 | mode &= ~FCREAT; | |
135 | } | |
136 | } else { | |
137 | ip = namei(uchar, LOOKUP, 1); | |
138 | if (ip == NULL) | |
139 | return; | |
140 | } | |
141 | if ((ip->i_mode & IFMT) == IFSOCK) { | |
142 | u.u_error = EOPNOTSUPP; | |
143 | goto bad; | |
144 | } | |
145 | if ((mode&FCREAT) == 0) { | |
3e78e260 | 146 | if (mode&FREAD) |
528f664c SL |
147 | if (access(ip, IREAD)) |
148 | goto bad; | |
09bf91df | 149 | if (mode&(FWRITE|FTRUNC)) { |
528f664c SL |
150 | if (access(ip, IWRITE)) |
151 | goto bad; | |
152 | if ((ip->i_mode&IFMT) == IFDIR) { | |
3e78e260 | 153 | u.u_error = EISDIR; |
528f664c SL |
154 | goto bad; |
155 | } | |
3e78e260 BJ |
156 | } |
157 | } | |
88a7a62a SL |
158 | fp = falloc(); |
159 | if (fp == NULL) | |
160 | goto bad; | |
161 | if (mode&FTRUNC) | |
4f083fd7 | 162 | itrunc(ip, (u_long)0); |
ca91bded | 163 | iunlock(ip); |
88a7a62a SL |
164 | fp->f_flag = mode&FMASK; |
165 | fp->f_type = DTYPE_INODE; | |
166 | fp->f_ops = &inodeops; | |
167 | fp->f_data = (caddr_t)ip; | |
3e78e260 | 168 | i = u.u_r.r_val1; |
88a7a62a SL |
169 | if (setjmp(&u.u_qsave)) { |
170 | if (u.u_error == 0) | |
171 | u.u_error = EINTR; | |
172 | u.u_ofile[i] = NULL; | |
173 | closef(fp); | |
3e78e260 | 174 | return; |
528f664c | 175 | } |
88a7a62a SL |
176 | u.u_error = openi(ip, mode); |
177 | if (u.u_error == 0) | |
178 | return; | |
3e78e260 BJ |
179 | u.u_ofile[i] = NULL; |
180 | fp->f_count--; | |
8eee8525 | 181 | irele(ip); |
528f664c SL |
182 | return; |
183 | bad: | |
184 | iput(ip); | |
3e78e260 BJ |
185 | } |
186 | ||
187 | /* | |
188 | * Mknod system call | |
189 | */ | |
190 | mknod() | |
191 | { | |
192 | register struct inode *ip; | |
193 | register struct a { | |
194 | char *fname; | |
195 | int fmode; | |
196 | int dev; | |
197 | } *uap; | |
198 | ||
199 | uap = (struct a *)u.u_ap; | |
88a7a62a SL |
200 | if (!suser()) |
201 | return; | |
202 | ip = namei(uchar, CREATE, 0); | |
203 | if (ip != NULL) { | |
204 | u.u_error = EEXIST; | |
205 | goto out; | |
3e78e260 BJ |
206 | } |
207 | if (u.u_error) | |
208 | return; | |
209 | ip = maknode(uap->fmode); | |
210 | if (ip == NULL) | |
211 | return; | |
88a7a62a SL |
212 | switch (ip->i_mode & IFMT) { |
213 | ||
7bfaea72 | 214 | case IFMT: /* used by badsect to flag bad sectors */ |
88a7a62a SL |
215 | case IFCHR: |
216 | case IFBLK: | |
217 | if (uap->dev) { | |
218 | /* | |
219 | * Want to be able to use this to make badblock | |
220 | * inodes, so don't truncate the dev number. | |
221 | */ | |
222 | ip->i_rdev = uap->dev; | |
223 | ip->i_flag |= IACC|IUPD|ICHG; | |
224 | } | |
3e78e260 BJ |
225 | } |
226 | ||
227 | out: | |
228 | iput(ip); | |
229 | } | |
230 | ||
231 | /* | |
232 | * link system call | |
233 | */ | |
234 | link() | |
235 | { | |
236 | register struct inode *ip, *xp; | |
237 | register struct a { | |
238 | char *target; | |
239 | char *linkname; | |
240 | } *uap; | |
241 | ||
242 | uap = (struct a *)u.u_ap; | |
4f083fd7 | 243 | ip = namei(uchar, LOOKUP, 1); /* well, this routine is doomed anyhow */ |
3e78e260 BJ |
244 | if (ip == NULL) |
245 | return; | |
4f083fd7 | 246 | if ((ip->i_mode&IFMT) == IFDIR && !suser()) { |
f94ceb3b BJ |
247 | iput(ip); |
248 | return; | |
249 | } | |
3e78e260 BJ |
250 | ip->i_nlink++; |
251 | ip->i_flag |= ICHG; | |
3fd23f5c | 252 | iupdat(ip, &time, &time, 1); |
ca91bded | 253 | iunlock(ip); |
3e78e260 | 254 | u.u_dirp = (caddr_t)uap->linkname; |
4f083fd7 | 255 | xp = namei(uchar, CREATE, 0); |
3e78e260 BJ |
256 | if (xp != NULL) { |
257 | u.u_error = EEXIST; | |
258 | iput(xp); | |
259 | goto out; | |
260 | } | |
261 | if (u.u_error) | |
262 | goto out; | |
263 | if (u.u_pdir->i_dev != ip->i_dev) { | |
264 | iput(u.u_pdir); | |
265 | u.u_error = EXDEV; | |
266 | goto out; | |
267 | } | |
f2a5ad78 | 268 | u.u_error = direnter(ip); |
3e78e260 BJ |
269 | out: |
270 | if (u.u_error) { | |
271 | ip->i_nlink--; | |
272 | ip->i_flag |= ICHG; | |
273 | } | |
8eee8525 | 274 | irele(ip); |
3e78e260 BJ |
275 | } |
276 | ||
277 | /* | |
278 | * symlink -- make a symbolic link | |
279 | */ | |
280 | symlink() | |
281 | { | |
282 | register struct a { | |
283 | char *target; | |
284 | char *linkname; | |
285 | } *uap; | |
286 | register struct inode *ip; | |
287 | register char *tp; | |
288 | register c, nc; | |
289 | ||
290 | uap = (struct a *)u.u_ap; | |
291 | tp = uap->target; | |
292 | nc = 0; | |
293 | while (c = fubyte(tp)) { | |
294 | if (c < 0) { | |
295 | u.u_error = EFAULT; | |
296 | return; | |
297 | } | |
298 | tp++; | |
299 | nc++; | |
300 | } | |
301 | u.u_dirp = uap->linkname; | |
4f083fd7 | 302 | ip = namei(uchar, CREATE, 0); |
3e78e260 BJ |
303 | if (ip) { |
304 | iput(ip); | |
305 | u.u_error = EEXIST; | |
306 | return; | |
307 | } | |
308 | if (u.u_error) | |
309 | return; | |
310 | ip = maknode(IFLNK | 0777); | |
311 | if (ip == NULL) | |
312 | return; | |
31949305 | 313 | u.u_error = rdwri(UIO_WRITE, ip, uap->target, nc, 0, 0, (int *)0); |
4f083fd7 | 314 | /* handle u.u_error != 0 */ |
3e78e260 BJ |
315 | iput(ip); |
316 | } | |
317 | ||
318 | /* | |
319 | * Unlink system call. | |
320 | * Hard to avoid races here, especially | |
321 | * in unlinking directories. | |
322 | */ | |
323 | unlink() | |
324 | { | |
3e78e260 BJ |
325 | struct a { |
326 | char *fname; | |
327 | }; | |
4f083fd7 | 328 | register struct inode *ip, *dp; |
3e78e260 | 329 | |
4f083fd7 SL |
330 | ip = namei(uchar, DELETE | LOCKPARENT, 0); |
331 | if (ip == NULL) | |
3e78e260 | 332 | return; |
4f083fd7 SL |
333 | dp = u.u_pdir; |
334 | if ((ip->i_mode&IFMT) == IFDIR && !suser()) | |
3e78e260 BJ |
335 | goto out; |
336 | /* | |
337 | * Don't unlink a mounted file. | |
338 | */ | |
4f083fd7 | 339 | if (ip->i_dev != dp->i_dev) { |
3e78e260 BJ |
340 | u.u_error = EBUSY; |
341 | goto out; | |
342 | } | |
343 | if (ip->i_flag&ITEXT) | |
344 | xrele(ip); /* try once to free text */ | |
64d3a787 BJ |
345 | if (dirremove()) { |
346 | ip->i_nlink--; | |
347 | ip->i_flag |= ICHG; | |
6459ebe0 | 348 | } |
3e78e260 | 349 | out: |
4f083fd7 | 350 | if (dp == ip) |
8eee8525 KM |
351 | irele(ip); |
352 | else | |
353 | iput(ip); | |
4f083fd7 | 354 | iput(dp); |
3e78e260 BJ |
355 | } |
356 | ||
357 | /* | |
358 | * Seek system call | |
359 | */ | |
35e7c31a | 360 | lseek() |
3e78e260 BJ |
361 | { |
362 | register struct file *fp; | |
363 | register struct a { | |
528f664c | 364 | int fd; |
3e78e260 BJ |
365 | off_t off; |
366 | int sbase; | |
367 | } *uap; | |
368 | ||
369 | uap = (struct a *)u.u_ap; | |
8462a185 SL |
370 | GETF(fp, uap->fd); |
371 | if (fp->f_type != DTYPE_INODE) { | |
372 | u.u_error = ESPIPE; | |
3e78e260 | 373 | return; |
8462a185 | 374 | } |
b4d1aee9 SL |
375 | switch (uap->sbase) { |
376 | ||
377 | case L_INCR: | |
378 | fp->f_offset += uap->off; | |
379 | break; | |
380 | ||
381 | case L_XTND: | |
382 | fp->f_offset = uap->off + ((struct inode *)fp->f_data)->i_size; | |
383 | break; | |
384 | ||
385 | case L_SET: | |
386 | fp->f_offset = uap->off; | |
387 | break; | |
388 | ||
389 | default: | |
390 | u.u_error = EINVAL; | |
391 | return; | |
392 | } | |
393 | u.u_r.r_off = fp->f_offset; | |
3e78e260 BJ |
394 | } |
395 | ||
396 | /* | |
397 | * Access system call | |
398 | */ | |
399 | saccess() | |
400 | { | |
401 | register svuid, svgid; | |
402 | register struct inode *ip; | |
403 | register struct a { | |
404 | char *fname; | |
405 | int fmode; | |
406 | } *uap; | |
407 | ||
408 | uap = (struct a *)u.u_ap; | |
409 | svuid = u.u_uid; | |
410 | svgid = u.u_gid; | |
411 | u.u_uid = u.u_ruid; | |
412 | u.u_gid = u.u_rgid; | |
4f083fd7 | 413 | ip = namei(uchar, LOOKUP, 1); |
3e78e260 | 414 | if (ip != NULL) { |
88a7a62a | 415 | if ((uap->fmode&R_OK) && access(ip, IREAD)) |
528f664c | 416 | goto done; |
88a7a62a | 417 | if ((uap->fmode&W_OK) && access(ip, IWRITE)) |
528f664c | 418 | goto done; |
88a7a62a | 419 | if ((uap->fmode&X_OK) && access(ip, IEXEC)) |
528f664c SL |
420 | goto done; |
421 | done: | |
3e78e260 BJ |
422 | iput(ip); |
423 | } | |
424 | u.u_uid = svuid; | |
425 | u.u_gid = svgid; | |
426 | } | |
d67a03eb | 427 | |
d67a03eb | 428 | /* |
6459ebe0 | 429 | * Stat system call. This version follows links. |
d67a03eb BJ |
430 | */ |
431 | stat() | |
432 | { | |
d67a03eb | 433 | |
88a7a62a | 434 | stat1(1); |
d67a03eb BJ |
435 | } |
436 | ||
5485e062 | 437 | /* |
6459ebe0 | 438 | * Lstat system call. This version does not follow links. |
5485e062 BJ |
439 | */ |
440 | lstat() | |
88a7a62a SL |
441 | { |
442 | ||
443 | stat1(0); | |
444 | } | |
445 | ||
446 | stat1(follow) | |
447 | int follow; | |
5485e062 BJ |
448 | { |
449 | register struct inode *ip; | |
450 | register struct a { | |
451 | char *fname; | |
88a7a62a | 452 | struct stat *ub; |
5485e062 | 453 | } *uap; |
88a7a62a | 454 | struct stat sb; |
5485e062 BJ |
455 | |
456 | uap = (struct a *)u.u_ap; | |
88a7a62a | 457 | ip = namei(uchar, LOOKUP, follow); |
5485e062 BJ |
458 | if (ip == NULL) |
459 | return; | |
0eaf24e3 | 460 | (void) ino_stat(ip, &sb); |
5485e062 | 461 | iput(ip); |
88a7a62a | 462 | u.u_error = copyout((caddr_t)&sb, (caddr_t)uap->ub, sizeof (sb)); |
d67a03eb BJ |
463 | } |
464 | ||
465 | /* | |
5485e062 BJ |
466 | * Return target name of a symbolic link |
467 | */ | |
468 | readlink() | |
469 | { | |
470 | register struct inode *ip; | |
471 | register struct a { | |
472 | char *name; | |
473 | char *buf; | |
474 | int count; | |
31949305 BJ |
475 | } *uap = (struct a *)u.u_ap; |
476 | int resid; | |
5485e062 | 477 | |
4f083fd7 | 478 | ip = namei(uchar, LOOKUP, 0); |
5485e062 BJ |
479 | if (ip == NULL) |
480 | return; | |
481 | if ((ip->i_mode&IFMT) != IFLNK) { | |
482 | u.u_error = ENXIO; | |
483 | goto out; | |
484 | } | |
31949305 | 485 | u.u_error = rdwri(UIO_READ, ip, uap->buf, uap->count, 0, 0, &resid); |
5485e062 BJ |
486 | out: |
487 | iput(ip); | |
31949305 | 488 | u.u_r.r_val1 = uap->count - resid; |
5485e062 BJ |
489 | } |
490 | ||
4f083fd7 SL |
491 | /* |
492 | * Change mode of a file given path name. | |
493 | */ | |
3e78e260 | 494 | chmod() |
5485e062 | 495 | { |
528f664c SL |
496 | struct inode *ip; |
497 | struct a { | |
3e78e260 BJ |
498 | char *fname; |
499 | int fmode; | |
5485e062 | 500 | } *uap; |
5485e062 BJ |
501 | |
502 | uap = (struct a *)u.u_ap; | |
3e78e260 | 503 | if ((ip = owner(1)) == NULL) |
5485e062 | 504 | return; |
528f664c | 505 | chmod1(ip, uap->fmode); |
4f083fd7 | 506 | iput(ip); |
528f664c | 507 | } |
f94ceb3b | 508 | |
4f083fd7 SL |
509 | /* |
510 | * Change mode of a file given a file descriptor. | |
511 | */ | |
528f664c SL |
512 | fchmod() |
513 | { | |
514 | struct a { | |
515 | int fd; | |
516 | int fmode; | |
517 | } *uap; | |
518 | register struct inode *ip; | |
519 | register struct file *fp; | |
520 | ||
521 | uap = (struct a *)u.u_ap; | |
88a7a62a | 522 | fp = getinode(uap->fd); |
528f664c SL |
523 | if (fp == NULL) |
524 | return; | |
88a7a62a | 525 | ip = (struct inode *)fp->f_data; |
4f083fd7 | 526 | if (u.u_uid != ip->i_uid && !suser()) |
528f664c | 527 | return; |
4f083fd7 | 528 | ilock(ip); |
528f664c | 529 | chmod1(ip, uap->fmode); |
4f083fd7 | 530 | iunlock(ip); |
528f664c SL |
531 | } |
532 | ||
4f083fd7 SL |
533 | /* |
534 | * Change the mode on a file. | |
535 | * Inode must be locked before calling. | |
536 | */ | |
528f664c SL |
537 | chmod1(ip, mode) |
538 | register struct inode *ip; | |
539 | register int mode; | |
540 | { | |
197da11b | 541 | |
3e78e260 | 542 | ip->i_mode &= ~07777; |
f94ceb3b | 543 | if (u.u_uid) { |
528f664c | 544 | mode &= ~ISVTX; |
bb1b75f4 SL |
545 | if (!groupmember(ip->i_gid)) |
546 | mode &= ~ISGID; | |
f94ceb3b | 547 | } |
528f664c | 548 | ip->i_mode |= mode&07777; |
3e78e260 BJ |
549 | ip->i_flag |= ICHG; |
550 | if (ip->i_flag&ITEXT && (ip->i_mode&ISVTX)==0) | |
551 | xrele(ip); | |
5485e062 BJ |
552 | } |
553 | ||
4f083fd7 SL |
554 | /* |
555 | * Set ownership given a path name. | |
556 | */ | |
3e78e260 | 557 | chown() |
d67a03eb | 558 | { |
528f664c SL |
559 | struct inode *ip; |
560 | struct a { | |
3e78e260 BJ |
561 | char *fname; |
562 | int uid; | |
563 | int gid; | |
d67a03eb | 564 | } *uap; |
d67a03eb BJ |
565 | |
566 | uap = (struct a *)u.u_ap; | |
aad8ef38 | 567 | if (!suser() || (ip = owner(0)) == NULL) |
d67a03eb | 568 | return; |
bb1b75f4 | 569 | u.u_error = chown1(ip, uap->uid, uap->gid); |
4f083fd7 | 570 | iput(ip); |
528f664c | 571 | } |
f94ceb3b | 572 | |
4f083fd7 SL |
573 | /* |
574 | * Set ownership given a file descriptor. | |
575 | */ | |
528f664c SL |
576 | fchown() |
577 | { | |
578 | struct a { | |
579 | int fd; | |
580 | int uid; | |
581 | int gid; | |
582 | } *uap; | |
583 | register struct inode *ip; | |
584 | register struct file *fp; | |
585 | ||
586 | uap = (struct a *)u.u_ap; | |
88a7a62a | 587 | fp = getinode(uap->fd); |
528f664c SL |
588 | if (fp == NULL) |
589 | return; | |
88a7a62a | 590 | ip = (struct inode *)fp->f_data; |
aad8ef38 | 591 | if (!suser()) |
528f664c | 592 | return; |
4f083fd7 | 593 | ilock(ip); |
bb1b75f4 | 594 | u.u_error = chown1(ip, uap->uid, uap->gid); |
4f083fd7 | 595 | iunlock(ip); |
528f664c SL |
596 | } |
597 | ||
598 | /* | |
599 | * Perform chown operation on inode ip; | |
600 | * inode must be locked prior to call. | |
601 | */ | |
602 | chown1(ip, uid, gid) | |
603 | register struct inode *ip; | |
604 | int uid, gid; | |
605 | { | |
606 | #ifdef QUOTA | |
607 | register long change; | |
bb1b75f4 | 608 | #endif |
528f664c | 609 | |
bb1b75f4 SL |
610 | if (uid == -1) |
611 | uid = ip->i_uid; | |
612 | if (gid == -1) | |
613 | gid = ip->i_gid; | |
bb1b75f4 | 614 | #ifdef QUOTA |
3809bf69 | 615 | if (ip->i_uid == uid) /* this just speeds things a little */ |
0a77f278 | 616 | change = 0; |
2e073567 SL |
617 | else |
618 | change = ip->i_blocks; | |
619 | (void) chkdq(ip, -change, 1); | |
620 | (void) chkiq(ip->i_dev, ip, ip->i_uid, 1); | |
0a77f278 | 621 | dqrele(ip->i_dquot); |
f94ceb3b | 622 | #endif |
bb1b75f4 SL |
623 | ip->i_uid = uid; |
624 | ip->i_gid = gid; | |
3e78e260 BJ |
625 | ip->i_flag |= ICHG; |
626 | if (u.u_ruid != 0) | |
627 | ip->i_mode &= ~(ISUID|ISGID); | |
528f664c | 628 | #ifdef QUOTA |
0a77f278 | 629 | ip->i_dquot = inoquota(ip); |
2e073567 SL |
630 | (void) chkdq(ip, change, 1); |
631 | (void) chkiq(ip->i_dev, (struct inode *)NULL, uid, 1); | |
632 | return (u.u_error); /* should == 0 ALWAYS !! */ | |
633 | #else | |
bb1b75f4 | 634 | return (0); |
2e073567 | 635 | #endif |
d67a03eb BJ |
636 | } |
637 | ||
bb1b75f4 SL |
638 | utimes() |
639 | { | |
640 | register struct a { | |
641 | char *fname; | |
642 | struct timeval *tptr; | |
643 | } *uap = (struct a *)u.u_ap; | |
644 | register struct inode *ip; | |
645 | struct timeval tv[2]; | |
646 | ||
647 | if ((ip = owner(1)) == NULL) | |
648 | return; | |
649 | u.u_error = copyin((caddr_t)uap->tptr, (caddr_t)tv, sizeof (tv)); | |
650 | if (u.u_error == 0) { | |
651 | ip->i_flag |= IACC|IUPD|ICHG; | |
652 | iupdat(ip, &tv[0], &tv[1], 0); | |
653 | } | |
654 | iput(ip); | |
655 | } | |
d67a03eb | 656 | |
4f083fd7 SL |
657 | /* |
658 | * Flush any pending I/O. | |
659 | */ | |
3e78e260 | 660 | sync() |
d67a03eb | 661 | { |
d67a03eb | 662 | |
3fd23f5c | 663 | update(); |
d67a03eb | 664 | } |
64d3a787 | 665 | |
4f083fd7 SL |
666 | /* |
667 | * Truncate a file given its path name. | |
668 | */ | |
528f664c SL |
669 | truncate() |
670 | { | |
671 | struct a { | |
672 | char *fname; | |
4f083fd7 | 673 | u_long length; |
31949305 | 674 | } *uap = (struct a *)u.u_ap; |
528f664c SL |
675 | struct inode *ip; |
676 | ||
4f083fd7 | 677 | ip = namei(uchar, LOOKUP, 1); |
528f664c SL |
678 | if (ip == NULL) |
679 | return; | |
680 | if (access(ip, IWRITE)) | |
681 | goto bad; | |
682 | if ((ip->i_mode&IFMT) == IFDIR) { | |
683 | u.u_error = EISDIR; | |
684 | goto bad; | |
685 | } | |
686 | itrunc(ip, uap->length); | |
528f664c SL |
687 | bad: |
688 | iput(ip); | |
689 | } | |
690 | ||
4f083fd7 SL |
691 | /* |
692 | * Truncate a file given a file descriptor. | |
693 | */ | |
528f664c SL |
694 | ftruncate() |
695 | { | |
696 | struct a { | |
697 | int fd; | |
4f083fd7 | 698 | u_long length; |
31949305 | 699 | } *uap = (struct a *)u.u_ap; |
528f664c SL |
700 | struct inode *ip; |
701 | struct file *fp; | |
702 | ||
88a7a62a | 703 | fp = getinode(uap->fd); |
528f664c SL |
704 | if (fp == NULL) |
705 | return; | |
528f664c SL |
706 | if ((fp->f_flag&FWRITE) == 0) { |
707 | u.u_error = EINVAL; | |
708 | return; | |
709 | } | |
88a7a62a | 710 | ip = (struct inode *)fp->f_data; |
528f664c SL |
711 | ilock(ip); |
712 | itrunc(ip, uap->length); | |
4f083fd7 SL |
713 | iunlock(ip); |
714 | } | |
715 | ||
716 | /* | |
717 | * Synch an open file. | |
718 | */ | |
719 | fsync() | |
720 | { | |
721 | struct a { | |
722 | int fd; | |
723 | } *uap = (struct a *)u.u_ap; | |
724 | struct inode *ip; | |
725 | struct file *fp; | |
726 | ||
88a7a62a | 727 | fp = getinode(uap->fd); |
4f083fd7 SL |
728 | if (fp == NULL) |
729 | return; | |
88a7a62a | 730 | ip = (struct inode *)fp->f_data; |
4f083fd7 SL |
731 | ilock(ip); |
732 | syncip(ip); | |
733 | iunlock(ip); | |
528f664c SL |
734 | } |
735 | ||
4f083fd7 SL |
736 | /* |
737 | * Rename system call. | |
738 | * rename("foo", "bar"); | |
739 | * is essentially | |
740 | * unlink("bar"); | |
741 | * link("foo", "bar"); | |
742 | * unlink("foo"); | |
743 | * but ``atomically''. Can't do full commit without saving state in the | |
744 | * inode on disk which isn't feasible at this time. Best we can do is | |
745 | * always guarantee the target exists. | |
746 | * | |
747 | * Basic algorithm is: | |
748 | * | |
749 | * 1) Bump link count on source while we're linking it to the | |
750 | * target. This also insure the inode won't be deleted out | |
751 | * from underneath us while we work. | |
752 | * 2) Link source to destination. If destination already exists, | |
753 | * delete it first. | |
754 | * 3) Unlink source reference to inode if still around. | |
755 | * 4) If a directory was moved and the parent of the destination | |
756 | * is different from the source, patch the ".." entry in the | |
757 | * directory. | |
758 | * | |
759 | * Source and destination must either both be directories, or both | |
760 | * not be directories. If target is a directory, it must be empty. | |
761 | */ | |
528f664c SL |
762 | rename() |
763 | { | |
764 | struct a { | |
765 | char *from; | |
766 | char *to; | |
767 | } *uap; | |
4f083fd7 SL |
768 | register struct inode *ip, *xp, *dp; |
769 | int oldparent, parentdifferent, doingdirectory; | |
a5390dce | 770 | int error = 0; |
4f083fd7 SL |
771 | |
772 | uap = (struct a *)u.u_ap; | |
046f18d1 | 773 | ip = namei(uchar, DELETE | LOCKPARENT, 0); |
4f083fd7 SL |
774 | if (ip == NULL) |
775 | return; | |
776 | dp = u.u_pdir; | |
777 | oldparent = 0, doingdirectory = 0; | |
778 | if ((ip->i_mode&IFMT) == IFDIR) { | |
779 | register struct direct *d; | |
780 | ||
781 | d = &u.u_dent; | |
782 | /* | |
046f18d1 | 783 | * Avoid ".", "..", and aliases of "." for obvious reasons. |
4f083fd7 | 784 | */ |
046f18d1 SL |
785 | if ((d->d_namlen == 1 && d->d_name[0] == '.') || |
786 | (d->d_namlen == 2 && bcmp(d->d_name, "..", 2) == 0) || | |
787 | (dp == ip)) { | |
788 | iput(dp); | |
789 | if (dp == ip) | |
790 | irele(ip); | |
791 | else | |
4f083fd7 | 792 | iput(ip); |
046f18d1 SL |
793 | u.u_error = EINVAL; |
794 | return; | |
4f083fd7 SL |
795 | } |
796 | oldparent = dp->i_number; | |
797 | doingdirectory++; | |
798 | } | |
046f18d1 | 799 | iput(dp); |
4f083fd7 SL |
800 | |
801 | /* | |
802 | * 1) Bump link count while we're moving stuff | |
803 | * around. If we crash somewhere before | |
804 | * completing our work, the link count | |
805 | * may be wrong, but correctable. | |
806 | */ | |
807 | ip->i_nlink++; | |
808 | ip->i_flag |= ICHG; | |
809 | iupdat(ip, &time, &time, 1); | |
810 | iunlock(ip); | |
811 | ||
812 | /* | |
813 | * When the target exists, both the directory | |
814 | * and target inodes are returned locked. | |
815 | */ | |
816 | u.u_dirp = (caddr_t)uap->to; | |
f93197fc | 817 | xp = namei(uchar, CREATE | LOCKPARENT | NOCACHE, 0); |
a5390dce SL |
818 | if (u.u_error) { |
819 | error = u.u_error; | |
4f083fd7 | 820 | goto out; |
a5390dce | 821 | } |
4f083fd7 | 822 | dp = u.u_pdir; |
046f18d1 SL |
823 | /* |
824 | * If ".." must be changed (ie the directory gets a new | |
81552f0f KM |
825 | * parent) then the source directory must not be in the |
826 | * directory heirarchy above the target, as this would | |
827 | * orphan everything below the source directory. Also | |
828 | * the user must have write permission in the source so | |
829 | * as to be able to change "..". We must repeat the call | |
830 | * to namei, as the parent directory is unlocked by the | |
831 | * call to checkpath(). | |
046f18d1 SL |
832 | */ |
833 | parentdifferent = oldparent != dp->i_number; | |
81552f0f KM |
834 | if (doingdirectory && parentdifferent) { |
835 | if (access(ip, IWRITE)) | |
836 | goto bad; | |
837 | do { | |
838 | dp = u.u_pdir; | |
839 | if (xp != NULL) | |
840 | iput(xp); | |
841 | u.u_error = checkpath(ip, dp); | |
842 | if (u.u_error) | |
843 | goto out; | |
844 | u.u_dirp = (caddr_t)uap->to; | |
f93197fc | 845 | xp = namei(uchar, CREATE | LOCKPARENT | NOCACHE, 0); |
81552f0f KM |
846 | if (u.u_error) { |
847 | error = u.u_error; | |
848 | goto out; | |
849 | } | |
850 | } while (dp != u.u_pdir); | |
851 | } | |
4f083fd7 SL |
852 | /* |
853 | * 2) If target doesn't exist, link the target | |
854 | * to the source and unlink the source. | |
855 | * Otherwise, rewrite the target directory | |
856 | * entry to reference the source inode and | |
857 | * expunge the original entry's existence. | |
858 | */ | |
4f083fd7 SL |
859 | if (xp == NULL) { |
860 | if (dp->i_dev != ip->i_dev) { | |
a5390dce | 861 | error = EXDEV; |
4f083fd7 SL |
862 | goto bad; |
863 | } | |
864 | /* | |
865 | * Account for ".." in directory. | |
866 | * When source and destination have the | |
867 | * same parent we don't fool with the | |
868 | * link count -- this isn't required | |
869 | * because we do a similar check below. | |
870 | */ | |
871 | if (doingdirectory && parentdifferent) { | |
872 | dp->i_nlink++; | |
873 | dp->i_flag |= ICHG; | |
874 | iupdat(dp, &time, &time, 1); | |
875 | } | |
f2a5ad78 SL |
876 | error = direnter(ip); |
877 | if (error) | |
4f083fd7 SL |
878 | goto out; |
879 | } else { | |
880 | if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev) { | |
a5390dce | 881 | error = EXDEV; |
4f083fd7 SL |
882 | goto bad; |
883 | } | |
e69c3c9c SL |
884 | /* |
885 | * Short circuit rename(foo, foo). | |
886 | */ | |
887 | if (xp->i_number == ip->i_number) | |
888 | goto bad; | |
4f083fd7 | 889 | /* |
a5390dce SL |
890 | * Target must be empty if a directory |
891 | * and have no links to it. | |
4f083fd7 SL |
892 | * Also, insure source and target are |
893 | * compatible (both directories, or both | |
894 | * not directories). | |
895 | */ | |
896 | if ((xp->i_mode&IFMT) == IFDIR) { | |
a5390dce SL |
897 | if (!dirempty(xp) || xp->i_nlink > 2) { |
898 | error = ENOTEMPTY; | |
4f083fd7 SL |
899 | goto bad; |
900 | } | |
901 | if (!doingdirectory) { | |
a5390dce | 902 | error = ENOTDIR; |
4f083fd7 SL |
903 | goto bad; |
904 | } | |
905 | } else if (doingdirectory) { | |
a5390dce | 906 | error = EISDIR; |
4f083fd7 SL |
907 | goto bad; |
908 | } | |
909 | dirrewrite(dp, ip); | |
a5390dce SL |
910 | if (u.u_error) { |
911 | error = u.u_error; | |
4f083fd7 | 912 | goto bad1; |
a5390dce | 913 | } |
4f083fd7 | 914 | /* |
a5390dce SL |
915 | * Adjust the link count of the target to |
916 | * reflect the dirrewrite above. If this is | |
917 | * a directory it is empty and there are | |
918 | * no links to it, so we can squash the inode and | |
919 | * any space associated with it. We disallowed | |
920 | * renaming over top of a directory with links to | |
921 | * it above, as we've no way to determine if | |
922 | * we've got a link or the directory itself, and | |
923 | * if we get a link, then ".." will be screwed up. | |
4f083fd7 | 924 | */ |
a5390dce | 925 | xp->i_nlink--; |
4f083fd7 | 926 | if (doingdirectory) { |
a5390dce SL |
927 | if (--xp->i_nlink != 0) |
928 | panic("rename: linked directory"); | |
4f083fd7 | 929 | itrunc(xp, (u_long)0); |
a5390dce | 930 | } |
4f083fd7 SL |
931 | xp->i_flag |= ICHG; |
932 | iput(xp); | |
31db12cb | 933 | xp = NULL; |
4f083fd7 SL |
934 | } |
935 | ||
936 | /* | |
937 | * 3) Unlink the source. | |
938 | */ | |
939 | u.u_dirp = uap->from; | |
940 | dp = namei(uchar, DELETE, 0); | |
941 | /* | |
942 | * Insure directory entry still exists and | |
943 | * has not changed since the start of all | |
944 | * this. If either has occured, forget about | |
945 | * about deleting the original entry and just | |
946 | * adjust the link count in the inode. | |
947 | */ | |
948 | if (dp == NULL || u.u_dent.d_ino != ip->i_number) { | |
949 | ip->i_nlink--; | |
950 | ip->i_flag |= ICHG; | |
951 | } else { | |
952 | /* | |
953 | * If source is a directory, must adjust | |
954 | * link count of parent directory also. | |
955 | * If target didn't exist and source and | |
956 | * target have the same parent, then we | |
957 | * needn't touch the link count, it all | |
958 | * balances out in the end. Otherwise, we | |
959 | * must do so to reflect deletion of ".." | |
960 | * done above. | |
961 | */ | |
962 | if (doingdirectory && (xp != NULL || parentdifferent)) { | |
963 | dp->i_nlink--; | |
964 | dp->i_flag |= ICHG; | |
965 | } | |
966 | if (dirremove()) { | |
967 | ip->i_nlink--; | |
968 | ip->i_flag |= ICHG; | |
969 | } | |
a5390dce SL |
970 | if (error == 0) /* conservative */ |
971 | error = u.u_error; | |
4f083fd7 SL |
972 | } |
973 | irele(ip); | |
974 | if (dp) | |
975 | iput(dp); | |
976 | ||
977 | /* | |
978 | * 4) Renaming a directory with the parent | |
979 | * different requires ".." to be rewritten. | |
980 | * The window is still there for ".." to | |
981 | * be inconsistent, but this is unavoidable, | |
982 | * and a lot shorter than when it was done | |
983 | * in a user process. | |
984 | */ | |
a5390dce | 985 | if (doingdirectory && parentdifferent && error == 0) { |
4f083fd7 | 986 | struct dirtemplate dirbuf; |
528f664c | 987 | |
4f083fd7 SL |
988 | u.u_dirp = uap->to; |
989 | ip = namei(uchar, LOOKUP | LOCKPARENT, 0); | |
990 | if (ip == NULL) { | |
991 | printf("rename: .. went away\n"); | |
992 | return; | |
993 | } | |
994 | dp = u.u_pdir; | |
995 | if ((ip->i_mode&IFMT) != IFDIR) { | |
996 | printf("rename: .. not a directory\n"); | |
997 | goto stuck; | |
998 | } | |
a5390dce | 999 | error = rdwri(UIO_READ, ip, (caddr_t)&dirbuf, |
4f083fd7 | 1000 | sizeof (struct dirtemplate), (off_t)0, 1, (int *)0); |
a5390dce | 1001 | if (error == 0) { |
4f083fd7 SL |
1002 | dirbuf.dotdot_ino = dp->i_number; |
1003 | (void) rdwri(UIO_WRITE, ip, (caddr_t)&dirbuf, | |
1004 | sizeof (struct dirtemplate), (off_t)0, 1, (int *)0); | |
1005 | } | |
1006 | stuck: | |
1007 | irele(dp); | |
1008 | iput(ip); | |
1009 | } | |
a5390dce SL |
1010 | goto done; |
1011 | ||
4f083fd7 | 1012 | bad: |
31db12cb | 1013 | iput(dp); |
4f083fd7 SL |
1014 | bad1: |
1015 | if (xp) | |
31db12cb | 1016 | iput(xp); |
4f083fd7 SL |
1017 | out: |
1018 | ip->i_nlink--; | |
1019 | ip->i_flag |= ICHG; | |
1020 | irele(ip); | |
a5390dce SL |
1021 | done: |
1022 | if (error) | |
1023 | u.u_error = error; | |
528f664c SL |
1024 | } |
1025 | ||
64d3a787 BJ |
1026 | /* |
1027 | * Make a new file. | |
1028 | */ | |
1029 | struct inode * | |
1030 | maknode(mode) | |
1031 | int mode; | |
1032 | { | |
1033 | register struct inode *ip; | |
1034 | ino_t ipref; | |
1035 | ||
1036 | if ((mode & IFMT) == IFDIR) | |
1037 | ipref = dirpref(u.u_pdir->i_fs); | |
1038 | else | |
1039 | ipref = u.u_pdir->i_number; | |
1040 | ip = ialloc(u.u_pdir, ipref, mode); | |
1041 | if (ip == NULL) { | |
1042 | iput(u.u_pdir); | |
528f664c | 1043 | return (NULL); |
64d3a787 | 1044 | } |
528f664c | 1045 | #ifdef QUOTA |
64d3a787 BJ |
1046 | if (ip->i_dquot != NODQUOT) |
1047 | panic("maknode: dquot"); | |
1048 | #endif | |
1049 | ip->i_flag |= IACC|IUPD|ICHG; | |
1050 | if ((mode & IFMT) == 0) | |
1051 | mode |= IFREG; | |
1052 | ip->i_mode = mode & ~u.u_cmask; | |
1053 | ip->i_nlink = 1; | |
1054 | ip->i_uid = u.u_uid; | |
1055 | ip->i_gid = u.u_pdir->i_gid; | |
bb1b75f4 SL |
1056 | if (ip->i_mode & ISGID && !groupmember(ip->i_gid)) |
1057 | ip->i_mode &= ~ISGID; | |
528f664c | 1058 | #ifdef QUOTA |
64d3a787 BJ |
1059 | ip->i_dquot = inoquota(ip); |
1060 | #endif | |
1061 | ||
1062 | /* | |
1063 | * Make sure inode goes to disk before directory entry. | |
1064 | */ | |
3fd23f5c | 1065 | iupdat(ip, &time, &time, 1); |
f2a5ad78 | 1066 | u.u_error = direnter(ip); |
64d3a787 BJ |
1067 | if (u.u_error) { |
1068 | /* | |
f2a5ad78 SL |
1069 | * Write error occurred trying to update directory |
1070 | * so must deallocate the inode. | |
64d3a787 BJ |
1071 | */ |
1072 | ip->i_nlink = 0; | |
1073 | ip->i_flag |= ICHG; | |
1074 | iput(ip); | |
528f664c | 1075 | return (NULL); |
64d3a787 | 1076 | } |
528f664c | 1077 | return (ip); |
64d3a787 | 1078 | } |
88a7a62a SL |
1079 | |
1080 | /* | |
1081 | * A virgin directory (no blushing please). | |
1082 | */ | |
1083 | struct dirtemplate mastertemplate = { | |
1084 | 0, 12, 1, ".", | |
1085 | 0, DIRBLKSIZ - 12, 2, ".." | |
1086 | }; | |
1087 | ||
1088 | /* | |
1089 | * Mkdir system call | |
1090 | */ | |
1091 | mkdir() | |
1092 | { | |
1093 | struct a { | |
1094 | char *name; | |
1095 | int dmode; | |
1096 | } *uap; | |
1097 | register struct inode *ip, *dp; | |
1098 | struct dirtemplate dirtemplate; | |
1099 | ||
1100 | uap = (struct a *)u.u_ap; | |
1101 | ip = namei(uchar, CREATE, 0); | |
1102 | if (u.u_error) | |
1103 | return; | |
1104 | if (ip != NULL) { | |
1105 | iput(ip); | |
1106 | u.u_error = EEXIST; | |
1107 | return; | |
1108 | } | |
1109 | dp = u.u_pdir; | |
1110 | uap->dmode &= 0777; | |
1111 | uap->dmode |= IFDIR; | |
1112 | /* | |
1113 | * Must simulate part of maknode here | |
1114 | * in order to acquire the inode, but | |
1115 | * not have it entered in the parent | |
1116 | * directory. The entry is made later | |
1117 | * after writing "." and ".." entries out. | |
1118 | */ | |
1119 | ip = ialloc(dp, dirpref(dp->i_fs), uap->dmode); | |
1120 | if (ip == NULL) { | |
1121 | iput(dp); | |
1122 | return; | |
1123 | } | |
1124 | #ifdef QUOTA | |
1125 | if (ip->i_dquot != NODQUOT) | |
1126 | panic("mkdir: dquot"); | |
1127 | #endif | |
1128 | ip->i_flag |= IACC|IUPD|ICHG; | |
1129 | ip->i_mode = uap->dmode & ~u.u_cmask; | |
1130 | ip->i_nlink = 2; | |
1131 | ip->i_uid = u.u_uid; | |
1132 | ip->i_gid = dp->i_gid; | |
1133 | #ifdef QUOTA | |
1134 | ip->i_dquot = inoquota(ip); | |
1135 | #endif | |
1136 | iupdat(ip, &time, &time, 1); | |
1137 | ||
1138 | /* | |
1139 | * Bump link count in parent directory | |
1140 | * to reflect work done below. Should | |
1141 | * be done before reference is created | |
1142 | * so reparation is possible if we crash. | |
1143 | */ | |
1144 | dp->i_nlink++; | |
1145 | dp->i_flag |= ICHG; | |
1146 | iupdat(dp, &time, &time, 1); | |
1147 | ||
1148 | /* | |
1149 | * Initialize directory with "." | |
1150 | * and ".." from static template. | |
1151 | */ | |
1152 | dirtemplate = mastertemplate; | |
1153 | dirtemplate.dot_ino = ip->i_number; | |
1154 | dirtemplate.dotdot_ino = dp->i_number; | |
1155 | u.u_error = rdwri(UIO_WRITE, ip, (caddr_t)&dirtemplate, | |
1156 | sizeof (dirtemplate), (off_t)0, 1, (int *)0); | |
1157 | if (u.u_error) { | |
1158 | dp->i_nlink--; | |
1159 | dp->i_flag |= ICHG; | |
1160 | goto bad; | |
1161 | } | |
1162 | /* | |
1163 | * Directory all set up, now | |
1164 | * install the entry for it in | |
1165 | * the parent directory. | |
1166 | */ | |
1167 | u.u_error = direnter(ip); | |
1168 | dp = NULL; | |
1169 | if (u.u_error) { | |
1170 | u.u_dirp = uap->name; | |
f93197fc | 1171 | dp = namei(uchar, LOOKUP | NOCACHE, 0); |
88a7a62a SL |
1172 | if (dp) { |
1173 | dp->i_nlink--; | |
1174 | dp->i_flag |= ICHG; | |
1175 | } | |
1176 | } | |
1177 | bad: | |
1178 | /* | |
1179 | * No need to do an explicit itrunc here, | |
1180 | * irele will do this for us because we set | |
1181 | * the link count to 0. | |
1182 | */ | |
1183 | if (u.u_error) { | |
1184 | ip->i_nlink = 0; | |
1185 | ip->i_flag |= ICHG; | |
1186 | } | |
1187 | if (dp) | |
1188 | iput(dp); | |
1189 | iput(ip); | |
1190 | } | |
1191 | ||
1192 | /* | |
1193 | * Rmdir system call. | |
1194 | */ | |
1195 | rmdir() | |
1196 | { | |
1197 | struct a { | |
1198 | char *name; | |
1199 | }; | |
1200 | register struct inode *ip, *dp; | |
1201 | ||
1202 | ip = namei(uchar, DELETE | LOCKPARENT, 0); | |
1203 | if (ip == NULL) | |
1204 | return; | |
1205 | dp = u.u_pdir; | |
1206 | /* | |
1207 | * No rmdir "." please. | |
1208 | */ | |
1209 | if (dp == ip) { | |
1210 | irele(dp); | |
1211 | iput(ip); | |
1212 | u.u_error = EINVAL; | |
1213 | return; | |
1214 | } | |
1215 | if ((ip->i_mode&IFMT) != IFDIR) { | |
1216 | u.u_error = ENOTDIR; | |
1217 | goto out; | |
1218 | } | |
1219 | /* | |
1220 | * Don't remove a mounted on directory. | |
1221 | */ | |
1222 | if (ip->i_dev != dp->i_dev) { | |
1223 | u.u_error = EBUSY; | |
1224 | goto out; | |
1225 | } | |
1226 | /* | |
1227 | * Verify the directory is empty (and valid). | |
1228 | * (Rmdir ".." won't be valid since | |
1229 | * ".." will contain a reference to | |
1230 | * the current directory and thus be | |
1231 | * non-empty.) | |
1232 | */ | |
1233 | if (ip->i_nlink != 2 || !dirempty(ip)) { | |
1234 | u.u_error = ENOTEMPTY; | |
1235 | goto out; | |
1236 | } | |
1237 | /* | |
1238 | * Delete reference to directory before purging | |
1239 | * inode. If we crash in between, the directory | |
1240 | * will be reattached to lost+found, | |
1241 | */ | |
1242 | if (dirremove() == 0) | |
1243 | goto out; | |
1244 | dp->i_nlink--; | |
1245 | dp->i_flag |= ICHG; | |
1246 | iput(dp); | |
1247 | dp = NULL; | |
1248 | /* | |
1249 | * Truncate inode. The only stuff left | |
1250 | * in the directory is "." and "..". The | |
1251 | * "." reference is inconsequential since | |
1252 | * we're quashing it. The ".." reference | |
1253 | * has already been adjusted above. We've | |
1254 | * removed the "." reference and the reference | |
1255 | * in the parent directory, but there may be | |
1256 | * other hard links so decrement by 2 and | |
1257 | * worry about them later. | |
1258 | */ | |
1259 | ip->i_nlink -= 2; | |
1260 | itrunc(ip, (u_long)0); | |
1261 | out: | |
1262 | if (dp) | |
1263 | iput(dp); | |
1264 | iput(ip); | |
1265 | } | |
1266 | ||
1267 | struct file * | |
1268 | getinode(fdes) | |
1269 | int fdes; | |
1270 | { | |
8462a185 | 1271 | struct file *fp; |
88a7a62a | 1272 | |
8462a185 SL |
1273 | if ((unsigned)fdes >= NOFILE || (fp = u.u_ofile[fdes]) == NULL) { |
1274 | u.u_error = EBADF; | |
1275 | return ((struct file *)0); | |
1276 | } | |
88a7a62a SL |
1277 | if (fp->f_type != DTYPE_INODE) { |
1278 | u.u_error = EINVAL; | |
8462a185 | 1279 | return ((struct file *)0); |
88a7a62a SL |
1280 | } |
1281 | return (fp); | |
1282 | } | |
1283 | ||
1284 | /* | |
1285 | * mode mask for creation of files | |
1286 | */ | |
1287 | umask() | |
1288 | { | |
1289 | register struct a { | |
1290 | int mask; | |
1291 | } *uap; | |
1292 | ||
1293 | uap = (struct a *)u.u_ap; | |
1294 | u.u_r.r_val1 = u.u_cmask; | |
1295 | u.u_cmask = uap->mask & 07777; | |
1296 | } |