Commit | Line | Data |
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15637ed4 RG |
1 | /* |
2 | * Copyright (c) 1989 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | * | |
600f7f07 | 33 | * from: @(#)vfs_syscalls.c 7.74 (Berkeley) 6/21/91 |
b43a13ed | 34 | * $Id: vfs_syscalls.c,v 1.4 1993/10/16 15:25:26 rgrimes Exp $ |
15637ed4 RG |
35 | */ |
36 | ||
37 | #include "param.h" | |
38 | #include "systm.h" | |
39 | #include "namei.h" | |
40 | #include "filedesc.h" | |
41 | #include "kernel.h" | |
42 | #include "file.h" | |
43 | #include "stat.h" | |
44 | #include "vnode.h" | |
45 | #include "mount.h" | |
46 | #include "proc.h" | |
47 | #include "uio.h" | |
48 | #include "malloc.h" | |
49 | ||
50 | /* | |
51 | * Virtual File System System Calls | |
52 | */ | |
53 | ||
54 | /* | |
55 | * Mount system call. | |
56 | */ | |
3c7eb27c DG |
57 | |
58 | struct mount_args { | |
59 | int type; | |
60 | char *dir; | |
61 | int flags; | |
62 | caddr_t data; | |
63 | }; | |
64 | ||
15637ed4 RG |
65 | /* ARGSUSED */ |
66 | mount(p, uap, retval) | |
67 | struct proc *p; | |
3c7eb27c | 68 | register struct mount_args *uap; |
15637ed4 RG |
69 | int *retval; |
70 | { | |
71 | register struct nameidata *ndp; | |
72 | register struct vnode *vp; | |
73 | register struct mount *mp; | |
74 | int error, flag; | |
75 | struct nameidata nd; | |
76 | ||
77 | /* | |
78 | * Must be super user | |
79 | */ | |
80 | if (error = suser(p->p_ucred, &p->p_acflag)) | |
81 | return (error); | |
82 | /* | |
83 | * Get vnode to be covered | |
84 | */ | |
85 | ndp = &nd; | |
86 | ndp->ni_nameiop = LOOKUP | FOLLOW | LOCKLEAF; | |
87 | ndp->ni_segflg = UIO_USERSPACE; | |
88 | ndp->ni_dirp = uap->dir; | |
89 | if (error = namei(ndp, p)) | |
90 | return (error); | |
91 | vp = ndp->ni_vp; | |
92 | if (uap->flags & MNT_UPDATE) { | |
93 | if ((vp->v_flag & VROOT) == 0) { | |
94 | vput(vp); | |
95 | return (EINVAL); | |
96 | } | |
97 | mp = vp->v_mount; | |
98 | /* | |
99 | * We allow going from read-only to read-write, | |
100 | * but not from read-write to read-only. | |
101 | */ | |
102 | if ((mp->mnt_flag & MNT_RDONLY) == 0 && | |
103 | (uap->flags & MNT_RDONLY) != 0) { | |
104 | vput(vp); | |
105 | return (EOPNOTSUPP); /* Needs translation */ | |
106 | } | |
107 | flag = mp->mnt_flag; | |
108 | mp->mnt_flag |= MNT_UPDATE; | |
109 | VOP_UNLOCK(vp); | |
110 | goto update; | |
111 | } | |
112 | vinvalbuf(vp, 1); | |
113 | if (vp->v_usecount != 1) { | |
114 | vput(vp); | |
115 | return (EBUSY); | |
116 | } | |
117 | if (vp->v_type != VDIR) { | |
118 | vput(vp); | |
119 | return (ENOTDIR); | |
120 | } | |
121 | if ((unsigned long)uap->type > MOUNT_MAXTYPE || | |
122 | vfssw[uap->type] == (struct vfsops *)0) { | |
123 | vput(vp); | |
124 | return (ENODEV); | |
125 | } | |
126 | ||
127 | /* | |
128 | * Allocate and initialize the file system. | |
129 | */ | |
130 | mp = (struct mount *)malloc((u_long)sizeof(struct mount), | |
131 | M_MOUNT, M_WAITOK); | |
132 | mp->mnt_op = vfssw[uap->type]; | |
133 | mp->mnt_flag = 0; | |
134 | mp->mnt_exroot = 0; | |
135 | mp->mnt_mounth = NULLVP; | |
136 | if (error = vfs_lock(mp)) { | |
137 | free((caddr_t)mp, M_MOUNT); | |
138 | vput(vp); | |
139 | return (error); | |
140 | } | |
141 | if (vp->v_mountedhere != (struct mount *)0) { | |
142 | vfs_unlock(mp); | |
143 | free((caddr_t)mp, M_MOUNT); | |
144 | vput(vp); | |
145 | return (EBUSY); | |
146 | } | |
147 | vp->v_mountedhere = mp; | |
148 | mp->mnt_vnodecovered = vp; | |
149 | update: | |
150 | /* | |
151 | * Set the mount level flags. | |
152 | */ | |
153 | if (uap->flags & MNT_RDONLY) | |
154 | mp->mnt_flag |= MNT_RDONLY; | |
155 | else | |
156 | mp->mnt_flag &= ~MNT_RDONLY; | |
157 | if (uap->flags & MNT_NOSUID) | |
158 | mp->mnt_flag |= MNT_NOSUID; | |
159 | else | |
160 | mp->mnt_flag &= ~MNT_NOSUID; | |
161 | if (uap->flags & MNT_NOEXEC) | |
162 | mp->mnt_flag |= MNT_NOEXEC; | |
163 | else | |
164 | mp->mnt_flag &= ~MNT_NOEXEC; | |
165 | if (uap->flags & MNT_NODEV) | |
166 | mp->mnt_flag |= MNT_NODEV; | |
167 | else | |
168 | mp->mnt_flag &= ~MNT_NODEV; | |
ce723be2 CR |
169 | if (uap->flags & MNT_NOCORE) |
170 | mp->mnt_flag |= MNT_NOCORE; | |
171 | else | |
172 | mp->mnt_flag &= ~MNT_NOCORE; | |
15637ed4 RG |
173 | if (uap->flags & MNT_SYNCHRONOUS) |
174 | mp->mnt_flag |= MNT_SYNCHRONOUS; | |
175 | else | |
176 | mp->mnt_flag &= ~MNT_SYNCHRONOUS; | |
177 | /* | |
178 | * Mount the filesystem. | |
179 | */ | |
180 | error = VFS_MOUNT(mp, uap->dir, uap->data, ndp, p); | |
181 | if (mp->mnt_flag & MNT_UPDATE) { | |
182 | mp->mnt_flag &= ~MNT_UPDATE; | |
183 | vrele(vp); | |
184 | if (error) | |
185 | mp->mnt_flag = flag; | |
186 | return (error); | |
187 | } | |
188 | /* | |
189 | * Put the new filesystem on the mount list after root. | |
190 | */ | |
191 | mp->mnt_next = rootfs->mnt_next; | |
192 | mp->mnt_prev = rootfs; | |
193 | rootfs->mnt_next = mp; | |
194 | mp->mnt_next->mnt_prev = mp; | |
195 | cache_purge(vp); | |
196 | if (!error) { | |
197 | VOP_UNLOCK(vp); | |
198 | vfs_unlock(mp); | |
199 | error = VFS_START(mp, 0, p); | |
200 | } else { | |
201 | vfs_remove(mp); | |
202 | free((caddr_t)mp, M_MOUNT); | |
203 | vput(vp); | |
204 | } | |
205 | return (error); | |
206 | } | |
207 | ||
208 | /* | |
209 | * Unmount system call. | |
210 | * | |
211 | * Note: unmount takes a path to the vnode mounted on as argument, | |
212 | * not special file (as before). | |
213 | */ | |
3c7eb27c DG |
214 | |
215 | struct umount_args { | |
216 | char *pathp; | |
217 | int flags; | |
218 | }; | |
219 | ||
15637ed4 RG |
220 | /* ARGSUSED */ |
221 | unmount(p, uap, retval) | |
222 | struct proc *p; | |
3c7eb27c | 223 | register struct umount_args *uap; |
15637ed4 RG |
224 | int *retval; |
225 | { | |
226 | register struct vnode *vp; | |
227 | register struct nameidata *ndp; | |
228 | struct mount *mp; | |
229 | int error; | |
230 | struct nameidata nd; | |
231 | ||
232 | /* | |
233 | * Must be super user | |
234 | */ | |
235 | if (error = suser(p->p_ucred, &p->p_acflag)) | |
236 | return (error); | |
237 | ||
238 | ndp = &nd; | |
239 | ndp->ni_nameiop = LOOKUP | LOCKLEAF | FOLLOW; | |
240 | ndp->ni_segflg = UIO_USERSPACE; | |
241 | ndp->ni_dirp = uap->pathp; | |
242 | if (error = namei(ndp, p)) | |
243 | return (error); | |
244 | vp = ndp->ni_vp; | |
245 | /* | |
246 | * Must be the root of the filesystem | |
247 | */ | |
248 | if ((vp->v_flag & VROOT) == 0) { | |
249 | vput(vp); | |
250 | return (EINVAL); | |
251 | } | |
252 | mp = vp->v_mount; | |
253 | vput(vp); | |
254 | return (dounmount(mp, uap->flags, p)); | |
255 | } | |
256 | ||
257 | /* | |
258 | * Do an unmount. | |
259 | */ | |
260 | dounmount(mp, flags, p) | |
261 | register struct mount *mp; | |
262 | int flags; | |
263 | struct proc *p; | |
264 | { | |
265 | struct vnode *coveredvp; | |
266 | int error; | |
267 | ||
268 | coveredvp = mp->mnt_vnodecovered; | |
269 | if (vfs_busy(mp)) | |
270 | return (EBUSY); | |
271 | mp->mnt_flag |= MNT_UNMOUNT; | |
272 | if (error = vfs_lock(mp)) | |
273 | return (error); | |
274 | ||
275 | vnode_pager_umount(mp); /* release cached vnodes */ | |
276 | cache_purgevfs(mp); /* remove cache entries for this file sys */ | |
277 | if ((error = VFS_SYNC(mp, MNT_WAIT)) == 0 || (flags & MNT_FORCE)) | |
278 | error = VFS_UNMOUNT(mp, flags, p); | |
279 | mp->mnt_flag &= ~MNT_UNMOUNT; | |
280 | vfs_unbusy(mp); | |
281 | if (error) { | |
282 | vfs_unlock(mp); | |
283 | } else { | |
284 | vrele(coveredvp); | |
285 | vfs_remove(mp); | |
286 | free((caddr_t)mp, M_MOUNT); | |
287 | } | |
288 | return (error); | |
289 | } | |
290 | ||
291 | /* | |
292 | * Sync system call. | |
293 | * Sync each mounted filesystem. | |
294 | */ | |
295 | /* ARGSUSED */ | |
296 | sync(p, uap, retval) | |
297 | struct proc *p; | |
298 | void *uap; | |
299 | int *retval; | |
300 | { | |
301 | register struct mount *mp; | |
302 | struct mount *omp; | |
303 | ||
b43a13ed DG |
304 | if ((mp = rootfs) == NULL) |
305 | return (0); | |
15637ed4 RG |
306 | do { |
307 | /* | |
308 | * The lock check below is to avoid races with mount | |
309 | * and unmount. | |
310 | */ | |
311 | if ((mp->mnt_flag & (MNT_MLOCK|MNT_RDONLY|MNT_MPBUSY)) == 0 && | |
312 | !vfs_busy(mp)) { | |
313 | VFS_SYNC(mp, MNT_NOWAIT); | |
314 | omp = mp; | |
315 | mp = mp->mnt_next; | |
316 | vfs_unbusy(omp); | |
317 | } else | |
318 | mp = mp->mnt_next; | |
319 | } while (mp != rootfs); | |
320 | return (0); | |
321 | } | |
322 | ||
323 | /* | |
324 | * Operate on filesystem quotas. | |
325 | */ | |
3c7eb27c DG |
326 | |
327 | struct quotactl_args { | |
328 | char *path; | |
329 | int cmd; | |
330 | int uid; | |
331 | caddr_t arg; | |
332 | }; | |
333 | ||
15637ed4 RG |
334 | /* ARGSUSED */ |
335 | quotactl(p, uap, retval) | |
336 | struct proc *p; | |
3c7eb27c | 337 | register struct quotactl_args *uap; |
15637ed4 RG |
338 | int *retval; |
339 | { | |
340 | register struct mount *mp; | |
341 | register struct nameidata *ndp; | |
342 | int error; | |
343 | struct nameidata nd; | |
344 | ||
345 | ndp = &nd; | |
346 | ndp->ni_nameiop = LOOKUP | FOLLOW; | |
347 | ndp->ni_segflg = UIO_USERSPACE; | |
348 | ndp->ni_dirp = uap->path; | |
349 | if (error = namei(ndp, p)) | |
350 | return (error); | |
351 | mp = ndp->ni_vp->v_mount; | |
352 | vrele(ndp->ni_vp); | |
353 | return (VFS_QUOTACTL(mp, uap->cmd, uap->uid, uap->arg, p)); | |
354 | } | |
355 | ||
356 | /* | |
357 | * Get filesystem statistics. | |
358 | */ | |
3c7eb27c DG |
359 | |
360 | struct statfs_args { | |
361 | char *path; | |
362 | struct statfs *buf; | |
363 | }; | |
364 | ||
15637ed4 RG |
365 | /* ARGSUSED */ |
366 | statfs(p, uap, retval) | |
367 | struct proc *p; | |
3c7eb27c | 368 | register struct statfs_args *uap; |
15637ed4 RG |
369 | int *retval; |
370 | { | |
371 | register struct mount *mp; | |
372 | register struct nameidata *ndp; | |
373 | register struct statfs *sp; | |
374 | int error; | |
375 | struct nameidata nd; | |
376 | ||
377 | ndp = &nd; | |
378 | ndp->ni_nameiop = LOOKUP | FOLLOW; | |
379 | ndp->ni_segflg = UIO_USERSPACE; | |
380 | ndp->ni_dirp = uap->path; | |
381 | if (error = namei(ndp, p)) | |
382 | return (error); | |
383 | mp = ndp->ni_vp->v_mount; | |
384 | sp = &mp->mnt_stat; | |
385 | vrele(ndp->ni_vp); | |
386 | if (error = VFS_STATFS(mp, sp, p)) | |
387 | return (error); | |
388 | sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; | |
389 | return (copyout((caddr_t)sp, (caddr_t)uap->buf, sizeof(*sp))); | |
390 | } | |
391 | ||
392 | /* | |
393 | * Get filesystem statistics. | |
394 | */ | |
3c7eb27c DG |
395 | |
396 | struct fstatfs_args { | |
397 | int fd; | |
398 | struct statfs *buf; | |
399 | }; | |
400 | ||
15637ed4 RG |
401 | /* ARGSUSED */ |
402 | fstatfs(p, uap, retval) | |
403 | struct proc *p; | |
3c7eb27c | 404 | register struct fstatfs_args *uap; |
15637ed4 RG |
405 | int *retval; |
406 | { | |
407 | struct file *fp; | |
408 | struct mount *mp; | |
409 | register struct statfs *sp; | |
410 | int error; | |
411 | ||
412 | if (error = getvnode(p->p_fd, uap->fd, &fp)) | |
413 | return (error); | |
414 | mp = ((struct vnode *)fp->f_data)->v_mount; | |
415 | sp = &mp->mnt_stat; | |
416 | if (error = VFS_STATFS(mp, sp, p)) | |
417 | return (error); | |
418 | sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; | |
419 | return (copyout((caddr_t)sp, (caddr_t)uap->buf, sizeof(*sp))); | |
420 | } | |
421 | ||
422 | /* | |
423 | * Get statistics on all filesystems. | |
424 | */ | |
3c7eb27c DG |
425 | |
426 | struct getfsstat_args { | |
427 | struct statfs *buf; | |
428 | long bufsize; | |
429 | int flags; | |
430 | }; | |
431 | ||
15637ed4 RG |
432 | getfsstat(p, uap, retval) |
433 | struct proc *p; | |
3c7eb27c | 434 | register struct getfsstat_args *uap; |
15637ed4 RG |
435 | int *retval; |
436 | { | |
437 | register struct mount *mp; | |
438 | register struct statfs *sp; | |
439 | caddr_t sfsp; | |
440 | long count, maxcount, error; | |
441 | ||
442 | maxcount = uap->bufsize / sizeof(struct statfs); | |
443 | sfsp = (caddr_t)uap->buf; | |
444 | mp = rootfs; | |
445 | count = 0; | |
446 | do { | |
447 | if (sfsp && count < maxcount && | |
448 | ((mp->mnt_flag & MNT_MLOCK) == 0)) { | |
449 | sp = &mp->mnt_stat; | |
450 | /* | |
451 | * If MNT_NOWAIT is specified, do not refresh the | |
452 | * fsstat cache. MNT_WAIT overrides MNT_NOWAIT. | |
453 | */ | |
454 | if (((uap->flags & MNT_NOWAIT) == 0 || | |
455 | (uap->flags & MNT_WAIT)) && | |
456 | (error = VFS_STATFS(mp, sp, p))) { | |
457 | mp = mp->mnt_prev; | |
458 | continue; | |
459 | } | |
460 | sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; | |
461 | if (error = copyout((caddr_t)sp, sfsp, sizeof(*sp))) | |
462 | return (error); | |
463 | sfsp += sizeof(*sp); | |
464 | } | |
465 | count++; | |
466 | mp = mp->mnt_prev; | |
467 | } while (mp != rootfs); | |
468 | if (sfsp && count > maxcount) | |
469 | *retval = maxcount; | |
470 | else | |
471 | *retval = count; | |
472 | return (0); | |
473 | } | |
474 | ||
475 | /* | |
476 | * Change current working directory to a given file descriptor. | |
477 | */ | |
3c7eb27c DG |
478 | |
479 | struct fchdir_args { | |
480 | int fd; | |
481 | }; | |
482 | ||
15637ed4 RG |
483 | /* ARGSUSED */ |
484 | fchdir(p, uap, retval) | |
485 | struct proc *p; | |
3c7eb27c | 486 | struct fchdir_args *uap; |
15637ed4 RG |
487 | int *retval; |
488 | { | |
489 | register struct filedesc *fdp = p->p_fd; | |
490 | register struct vnode *vp; | |
491 | struct file *fp; | |
492 | int error; | |
493 | ||
494 | if (error = getvnode(fdp, uap->fd, &fp)) | |
495 | return (error); | |
496 | vp = (struct vnode *)fp->f_data; | |
497 | VOP_LOCK(vp); | |
498 | if (vp->v_type != VDIR) | |
499 | error = ENOTDIR; | |
500 | else | |
501 | error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p); | |
502 | VOP_UNLOCK(vp); | |
503 | if (error) | |
504 | return (error); | |
505 | VREF(vp); | |
506 | vrele(fdp->fd_cdir); | |
507 | fdp->fd_cdir = vp; | |
508 | return (0); | |
509 | } | |
510 | ||
511 | /* | |
512 | * Change current working directory (``.''). | |
513 | */ | |
3c7eb27c DG |
514 | |
515 | struct chdir_args { | |
516 | char *fname; | |
517 | }; | |
518 | ||
15637ed4 RG |
519 | /* ARGSUSED */ |
520 | chdir(p, uap, retval) | |
521 | struct proc *p; | |
3c7eb27c | 522 | struct chdir_args *uap; |
15637ed4 RG |
523 | int *retval; |
524 | { | |
525 | register struct nameidata *ndp; | |
526 | register struct filedesc *fdp = p->p_fd; | |
527 | int error; | |
528 | struct nameidata nd; | |
529 | ||
530 | ndp = &nd; | |
531 | ndp->ni_nameiop = LOOKUP | FOLLOW | LOCKLEAF; | |
532 | ndp->ni_segflg = UIO_USERSPACE; | |
533 | ndp->ni_dirp = uap->fname; | |
534 | if (error = chdirec(ndp, p)) | |
535 | return (error); | |
536 | vrele(fdp->fd_cdir); | |
537 | fdp->fd_cdir = ndp->ni_vp; | |
538 | return (0); | |
539 | } | |
540 | ||
541 | /* | |
542 | * Change notion of root (``/'') directory. | |
543 | */ | |
3c7eb27c DG |
544 | |
545 | struct chroot_args { | |
546 | char *fname; | |
547 | }; | |
548 | ||
15637ed4 RG |
549 | /* ARGSUSED */ |
550 | chroot(p, uap, retval) | |
551 | struct proc *p; | |
3c7eb27c | 552 | struct chroot_args *uap; |
15637ed4 RG |
553 | int *retval; |
554 | { | |
555 | register struct nameidata *ndp; | |
556 | register struct filedesc *fdp = p->p_fd; | |
557 | int error; | |
558 | struct nameidata nd; | |
559 | ||
560 | if (error = suser(p->p_ucred, &p->p_acflag)) | |
561 | return (error); | |
562 | ndp = &nd; | |
563 | ndp->ni_nameiop = LOOKUP | FOLLOW | LOCKLEAF; | |
564 | ndp->ni_segflg = UIO_USERSPACE; | |
565 | ndp->ni_dirp = uap->fname; | |
566 | if (error = chdirec(ndp, p)) | |
567 | return (error); | |
568 | if (fdp->fd_rdir != NULL) | |
569 | vrele(fdp->fd_rdir); | |
570 | fdp->fd_rdir = ndp->ni_vp; | |
571 | return (0); | |
572 | } | |
573 | ||
574 | /* | |
575 | * Common routine for chroot and chdir. | |
576 | */ | |
577 | chdirec(ndp, p) | |
578 | struct nameidata *ndp; | |
579 | struct proc *p; | |
580 | { | |
581 | struct vnode *vp; | |
582 | int error; | |
583 | ||
584 | if (error = namei(ndp, p)) | |
585 | return (error); | |
586 | vp = ndp->ni_vp; | |
587 | if (vp->v_type != VDIR) | |
588 | error = ENOTDIR; | |
589 | else | |
590 | error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p); | |
591 | VOP_UNLOCK(vp); | |
592 | if (error) | |
593 | vrele(vp); | |
594 | return (error); | |
595 | } | |
596 | ||
597 | /* | |
598 | * Open system call. | |
599 | * Check permissions, allocate an open file structure, | |
600 | * and call the device open routine if any. | |
601 | */ | |
3c7eb27c DG |
602 | |
603 | struct open_args { | |
604 | char *fname; | |
605 | int mode; | |
606 | int crtmode; | |
607 | }; | |
608 | ||
15637ed4 RG |
609 | open(p, uap, retval) |
610 | struct proc *p; | |
3c7eb27c | 611 | register struct open_args *uap; |
15637ed4 RG |
612 | int *retval; |
613 | { | |
614 | struct nameidata *ndp; | |
615 | register struct filedesc *fdp = p->p_fd; | |
616 | register struct file *fp; | |
617 | register struct vnode *vp; | |
618 | int fmode, cmode; | |
619 | struct file *nfp; | |
620 | int type, indx, error; | |
621 | struct flock lf; | |
622 | struct nameidata nd; | |
623 | extern struct fileops vnops; | |
624 | ||
625 | if (error = falloc(p, &nfp, &indx)) | |
626 | return (error); | |
627 | fp = nfp; | |
628 | fmode = FFLAGS(uap->mode); | |
629 | cmode = ((uap->crtmode &~ fdp->fd_cmask) & 07777) &~ S_ISVTX; | |
630 | ndp = &nd; | |
631 | ndp->ni_segflg = UIO_USERSPACE; | |
632 | ndp->ni_dirp = uap->fname; | |
633 | p->p_dupfd = -indx - 1; /* XXX check for fdopen */ | |
634 | if (error = vn_open(ndp, p, fmode, cmode)) { | |
635 | ffree(fp); | |
636 | if (error == ENODEV && /* XXX from fdopen */ | |
3c7eb27c | 637 | ((short) p->p_dupfd) >= 0 && |
15637ed4 RG |
638 | (error = dupfdopen(fdp, indx, p->p_dupfd, fmode)) == 0) { |
639 | *retval = indx; | |
640 | return (0); | |
641 | } | |
642 | if (error == ERESTART) | |
643 | error = EINTR; | |
644 | fdp->fd_ofiles[indx] = NULL; | |
645 | return (error); | |
646 | } | |
647 | vp = ndp->ni_vp; | |
648 | fp->f_flag = fmode & FMASK; | |
649 | if (fmode & (O_EXLOCK | O_SHLOCK)) { | |
650 | lf.l_whence = SEEK_SET; | |
651 | lf.l_start = 0; | |
652 | lf.l_len = 0; | |
653 | if (fmode & O_EXLOCK) | |
654 | lf.l_type = F_WRLCK; | |
655 | else | |
656 | lf.l_type = F_RDLCK; | |
657 | type = F_FLOCK; | |
658 | if ((fmode & FNONBLOCK) == 0) | |
659 | type |= F_WAIT; | |
660 | if (error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type)) { | |
661 | VOP_UNLOCK(vp); | |
662 | (void) vn_close(vp, fp->f_flag, fp->f_cred, p); | |
663 | ffree(fp); | |
664 | fdp->fd_ofiles[indx] = NULL; | |
665 | return (error); | |
666 | } | |
667 | fp->f_flag |= FHASLOCK; | |
668 | } | |
669 | VOP_UNLOCK(vp); | |
670 | fp->f_type = DTYPE_VNODE; | |
671 | fp->f_ops = &vnops; | |
672 | fp->f_data = (caddr_t)vp; | |
673 | *retval = indx; | |
674 | return (0); | |
675 | } | |
676 | ||
677 | #ifdef COMPAT_43 | |
678 | /* | |
679 | * Creat system call. | |
680 | */ | |
3c7eb27c DG |
681 | |
682 | struct ocreat_args { | |
683 | char *fname; | |
684 | int fmode; | |
685 | }; | |
686 | ||
15637ed4 RG |
687 | ocreat(p, uap, retval) |
688 | struct proc *p; | |
3c7eb27c | 689 | register struct ocreat_args *uap; |
15637ed4 RG |
690 | int *retval; |
691 | { | |
692 | struct newargs { | |
693 | char *fname; | |
694 | int mode; | |
695 | int crtmode; | |
696 | } openuap; | |
697 | ||
698 | openuap.fname = uap->fname; | |
699 | openuap.crtmode = uap->fmode; | |
700 | openuap.mode = O_WRONLY | O_CREAT | O_TRUNC; | |
701 | return (open(p, (struct args *)&openuap, retval)); | |
702 | } | |
703 | #endif /* COMPAT_43 */ | |
704 | ||
705 | /* | |
706 | * Mknod system call. | |
707 | */ | |
3c7eb27c DG |
708 | |
709 | struct mknod_args { | |
710 | char *fname; | |
711 | int fmode; | |
712 | int dev; | |
713 | }; | |
714 | ||
15637ed4 RG |
715 | /* ARGSUSED */ |
716 | mknod(p, uap, retval) | |
717 | struct proc *p; | |
3c7eb27c | 718 | register struct mknod_args *uap; |
15637ed4 RG |
719 | int *retval; |
720 | { | |
721 | register struct nameidata *ndp; | |
722 | register struct vnode *vp; | |
723 | struct vattr vattr; | |
724 | int error; | |
725 | struct nameidata nd; | |
726 | ||
727 | if (error = suser(p->p_ucred, &p->p_acflag)) | |
728 | return (error); | |
729 | ndp = &nd; | |
730 | ndp->ni_nameiop = CREATE | LOCKPARENT; | |
731 | ndp->ni_segflg = UIO_USERSPACE; | |
732 | ndp->ni_dirp = uap->fname; | |
733 | if (error = namei(ndp, p)) | |
734 | return (error); | |
735 | vp = ndp->ni_vp; | |
736 | if (vp != NULL) { | |
737 | error = EEXIST; | |
738 | goto out; | |
739 | } | |
740 | VATTR_NULL(&vattr); | |
741 | switch (uap->fmode & S_IFMT) { | |
742 | ||
743 | case S_IFMT: /* used by badsect to flag bad sectors */ | |
744 | vattr.va_type = VBAD; | |
745 | break; | |
746 | case S_IFCHR: | |
747 | vattr.va_type = VCHR; | |
748 | break; | |
749 | case S_IFBLK: | |
750 | vattr.va_type = VBLK; | |
751 | break; | |
752 | default: | |
753 | error = EINVAL; | |
754 | goto out; | |
755 | } | |
756 | vattr.va_mode = (uap->fmode & 07777) &~ p->p_fd->fd_cmask; | |
757 | vattr.va_rdev = uap->dev; | |
758 | out: | |
759 | if (!error) { | |
760 | error = VOP_MKNOD(ndp, &vattr, p->p_ucred, p); | |
761 | } else { | |
762 | VOP_ABORTOP(ndp); | |
763 | if (ndp->ni_dvp == vp) | |
764 | vrele(ndp->ni_dvp); | |
765 | else | |
766 | vput(ndp->ni_dvp); | |
767 | if (vp) | |
768 | vrele(vp); | |
769 | } | |
770 | return (error); | |
771 | } | |
772 | ||
773 | /* | |
774 | * Mkfifo system call. | |
775 | */ | |
3c7eb27c DG |
776 | |
777 | struct mkfifo_args { | |
778 | char *fname; | |
779 | int fmode; | |
780 | }; | |
781 | ||
15637ed4 RG |
782 | /* ARGSUSED */ |
783 | mkfifo(p, uap, retval) | |
784 | struct proc *p; | |
3c7eb27c | 785 | register struct mkfifo_args *uap; |
15637ed4 RG |
786 | int *retval; |
787 | { | |
788 | register struct nameidata *ndp; | |
789 | struct vattr vattr; | |
790 | int error; | |
791 | struct nameidata nd; | |
792 | ||
793 | #ifndef FIFO | |
794 | return (EOPNOTSUPP); | |
795 | #else | |
796 | ndp = &nd; | |
797 | ndp->ni_nameiop = CREATE | LOCKPARENT; | |
798 | ndp->ni_segflg = UIO_USERSPACE; | |
799 | ndp->ni_dirp = uap->fname; | |
800 | if (error = namei(ndp, p)) | |
801 | return (error); | |
802 | if (ndp->ni_vp != NULL) { | |
803 | VOP_ABORTOP(ndp); | |
804 | if (ndp->ni_dvp == ndp->ni_vp) | |
805 | vrele(ndp->ni_dvp); | |
806 | else | |
807 | vput(ndp->ni_dvp); | |
808 | vrele(ndp->ni_vp); | |
809 | return (EEXIST); | |
810 | } | |
811 | VATTR_NULL(&vattr); | |
812 | vattr.va_type = VFIFO; | |
813 | vattr.va_mode = (uap->fmode & 07777) &~ p->p_fd->fd_cmask; | |
814 | return (VOP_MKNOD(ndp, &vattr, p->p_ucred, p)); | |
815 | #endif /* FIFO */ | |
816 | } | |
817 | ||
818 | /* | |
819 | * Link system call. | |
820 | */ | |
3c7eb27c DG |
821 | |
822 | struct link_args { | |
823 | char *target; | |
824 | char *linkname; | |
825 | }; | |
826 | ||
15637ed4 RG |
827 | /* ARGSUSED */ |
828 | link(p, uap, retval) | |
829 | struct proc *p; | |
3c7eb27c | 830 | register struct link_args *uap; |
15637ed4 RG |
831 | int *retval; |
832 | { | |
833 | register struct nameidata *ndp; | |
834 | register struct vnode *vp, *xp; | |
835 | int error; | |
836 | struct nameidata nd; | |
837 | ||
838 | ndp = &nd; | |
839 | ndp->ni_nameiop = LOOKUP | FOLLOW; | |
840 | ndp->ni_segflg = UIO_USERSPACE; | |
841 | ndp->ni_dirp = uap->target; | |
842 | if (error = namei(ndp, p)) | |
843 | return (error); | |
844 | vp = ndp->ni_vp; | |
845 | if (vp->v_type == VDIR && | |
846 | (error = suser(p->p_ucred, &p->p_acflag))) | |
847 | goto out1; | |
848 | ndp->ni_nameiop = CREATE | LOCKPARENT; | |
849 | ndp->ni_dirp = (caddr_t)uap->linkname; | |
850 | if (error = namei(ndp, p)) | |
851 | goto out1; | |
852 | xp = ndp->ni_vp; | |
853 | if (xp != NULL) { | |
854 | error = EEXIST; | |
855 | goto out; | |
856 | } | |
857 | xp = ndp->ni_dvp; | |
858 | if (vp->v_mount != xp->v_mount) | |
859 | error = EXDEV; | |
860 | out: | |
861 | if (!error) { | |
862 | error = VOP_LINK(vp, ndp, p); | |
863 | } else { | |
864 | VOP_ABORTOP(ndp); | |
865 | if (ndp->ni_dvp == ndp->ni_vp) | |
866 | vrele(ndp->ni_dvp); | |
867 | else | |
868 | vput(ndp->ni_dvp); | |
869 | if (ndp->ni_vp) | |
870 | vrele(ndp->ni_vp); | |
871 | } | |
872 | out1: | |
873 | vrele(vp); | |
874 | return (error); | |
875 | } | |
876 | ||
877 | /* | |
878 | * Make a symbolic link. | |
879 | */ | |
3c7eb27c DG |
880 | |
881 | struct symlink_args { | |
882 | char *target; | |
883 | char *linkname; | |
884 | }; | |
885 | ||
15637ed4 RG |
886 | /* ARGSUSED */ |
887 | symlink(p, uap, retval) | |
888 | struct proc *p; | |
3c7eb27c | 889 | register struct symlink_args *uap; |
15637ed4 RG |
890 | int *retval; |
891 | { | |
892 | register struct nameidata *ndp; | |
893 | struct vattr vattr; | |
894 | char *target; | |
895 | int error; | |
896 | struct nameidata nd; | |
897 | ||
898 | ndp = &nd; | |
899 | ndp->ni_segflg = UIO_USERSPACE; | |
900 | ndp->ni_dirp = uap->linkname; | |
901 | MALLOC(target, char *, MAXPATHLEN, M_NAMEI, M_WAITOK); | |
902 | if (error = copyinstr(uap->target, target, MAXPATHLEN, (u_int *)0)) | |
903 | goto out; | |
904 | ndp->ni_nameiop = CREATE | LOCKPARENT; | |
905 | if (error = namei(ndp, p)) | |
906 | goto out; | |
907 | if (ndp->ni_vp) { | |
908 | VOP_ABORTOP(ndp); | |
909 | if (ndp->ni_dvp == ndp->ni_vp) | |
910 | vrele(ndp->ni_dvp); | |
911 | else | |
912 | vput(ndp->ni_dvp); | |
913 | vrele(ndp->ni_vp); | |
914 | error = EEXIST; | |
915 | goto out; | |
916 | } | |
917 | VATTR_NULL(&vattr); | |
918 | vattr.va_mode = 0777 &~ p->p_fd->fd_cmask; | |
919 | error = VOP_SYMLINK(ndp, &vattr, target, p); | |
920 | out: | |
921 | FREE(target, M_NAMEI); | |
922 | return (error); | |
923 | } | |
924 | ||
925 | /* | |
926 | * Delete a name from the filesystem. | |
927 | */ | |
3c7eb27c DG |
928 | |
929 | struct unlink_args { | |
930 | char *fname; | |
931 | }; | |
932 | ||
15637ed4 RG |
933 | /* ARGSUSED */ |
934 | unlink(p, uap, retval) | |
935 | struct proc *p; | |
3c7eb27c | 936 | struct unlink_args *uap; |
15637ed4 RG |
937 | int *retval; |
938 | { | |
939 | register struct nameidata *ndp; | |
940 | register struct vnode *vp; | |
941 | int error; | |
942 | struct nameidata nd; | |
943 | ||
944 | ndp = &nd; | |
945 | ndp->ni_nameiop = DELETE | LOCKPARENT | LOCKLEAF; | |
946 | ndp->ni_segflg = UIO_USERSPACE; | |
947 | ndp->ni_dirp = uap->fname; | |
948 | if (error = namei(ndp, p)) | |
949 | return (error); | |
950 | vp = ndp->ni_vp; | |
951 | if (vp->v_type == VDIR && | |
952 | (error = suser(p->p_ucred, &p->p_acflag))) | |
953 | goto out; | |
954 | /* | |
955 | * The root of a mounted filesystem cannot be deleted. | |
956 | */ | |
957 | if (vp->v_flag & VROOT) { | |
958 | error = EBUSY; | |
959 | goto out; | |
960 | } | |
961 | (void) vnode_pager_uncache(vp); | |
962 | out: | |
963 | if (!error) { | |
964 | error = VOP_REMOVE(ndp, p); | |
965 | } else { | |
966 | VOP_ABORTOP(ndp); | |
967 | if (ndp->ni_dvp == vp) | |
968 | vrele(ndp->ni_dvp); | |
969 | else | |
970 | vput(ndp->ni_dvp); | |
971 | vput(vp); | |
972 | } | |
973 | return (error); | |
974 | } | |
975 | ||
976 | /* | |
977 | * Seek system call. | |
978 | */ | |
3c7eb27c DG |
979 | |
980 | struct lseek_args { | |
981 | int fdes; | |
982 | off_t off; | |
983 | int sbase; | |
984 | }; | |
985 | ||
15637ed4 RG |
986 | lseek(p, uap, retval) |
987 | struct proc *p; | |
3c7eb27c | 988 | register struct lseek_args *uap; |
15637ed4 RG |
989 | off_t *retval; |
990 | { | |
991 | struct ucred *cred = p->p_ucred; | |
992 | register struct filedesc *fdp = p->p_fd; | |
993 | register struct file *fp; | |
994 | struct vattr vattr; | |
995 | int error; | |
996 | ||
997 | if ((unsigned)uap->fdes >= fdp->fd_nfiles || | |
998 | (fp = fdp->fd_ofiles[uap->fdes]) == NULL) | |
999 | return (EBADF); | |
1000 | if (fp->f_type != DTYPE_VNODE) | |
1001 | return (ESPIPE); | |
1002 | switch (uap->sbase) { | |
1003 | ||
1004 | case L_INCR: | |
1005 | fp->f_offset += uap->off; | |
1006 | break; | |
1007 | ||
1008 | case L_XTND: | |
1009 | if (error = VOP_GETATTR((struct vnode *)fp->f_data, | |
1010 | &vattr, cred, p)) | |
1011 | return (error); | |
1012 | fp->f_offset = uap->off + vattr.va_size; | |
1013 | break; | |
1014 | ||
1015 | case L_SET: | |
1016 | fp->f_offset = uap->off; | |
1017 | break; | |
1018 | ||
1019 | default: | |
1020 | return (EINVAL); | |
1021 | } | |
1022 | *retval = fp->f_offset; | |
1023 | return (0); | |
1024 | } | |
1025 | ||
1026 | /* | |
1027 | * Check access permissions. | |
1028 | */ | |
3c7eb27c DG |
1029 | |
1030 | struct saccess_args { | |
1031 | char *fname; | |
1032 | int fmode; | |
1033 | }; | |
1034 | ||
15637ed4 RG |
1035 | /* ARGSUSED */ |
1036 | saccess(p, uap, retval) | |
1037 | struct proc *p; | |
3c7eb27c | 1038 | register struct saccess_args *uap; |
15637ed4 RG |
1039 | int *retval; |
1040 | { | |
1041 | register struct nameidata *ndp; | |
1042 | register struct ucred *cred = p->p_ucred; | |
1043 | register struct vnode *vp; | |
1044 | int error, mode, svuid, svgid; | |
1045 | struct nameidata nd; | |
1046 | ||
1047 | ndp = &nd; | |
1048 | svuid = cred->cr_uid; | |
1049 | svgid = cred->cr_groups[0]; | |
1050 | cred->cr_uid = p->p_cred->p_ruid; | |
1051 | cred->cr_groups[0] = p->p_cred->p_rgid; | |
1052 | ndp->ni_nameiop = LOOKUP | FOLLOW | LOCKLEAF; | |
1053 | ndp->ni_segflg = UIO_USERSPACE; | |
1054 | ndp->ni_dirp = uap->fname; | |
1055 | if (error = namei(ndp, p)) | |
1056 | goto out1; | |
1057 | vp = ndp->ni_vp; | |
1058 | /* | |
1059 | * fmode == 0 means only check for exist | |
1060 | */ | |
1061 | if (uap->fmode) { | |
1062 | mode = 0; | |
1063 | if (uap->fmode & R_OK) | |
1064 | mode |= VREAD; | |
1065 | if (uap->fmode & W_OK) | |
1066 | mode |= VWRITE; | |
1067 | if (uap->fmode & X_OK) | |
1068 | mode |= VEXEC; | |
1069 | if ((mode & VWRITE) == 0 || (error = vn_writechk(vp)) == 0) | |
1070 | error = VOP_ACCESS(vp, mode, cred, p); | |
1071 | } | |
1072 | vput(vp); | |
1073 | out1: | |
1074 | cred->cr_uid = svuid; | |
1075 | cred->cr_groups[0] = svgid; | |
1076 | return (error); | |
1077 | } | |
1078 | ||
1079 | /* | |
1080 | * Stat system call. | |
1081 | * This version follows links. | |
1082 | */ | |
3c7eb27c DG |
1083 | |
1084 | struct stat_args { | |
1085 | char *fname; | |
1086 | struct stat *ub; | |
1087 | }; | |
1088 | ||
15637ed4 RG |
1089 | /* ARGSUSED */ |
1090 | stat(p, uap, retval) | |
1091 | struct proc *p; | |
3c7eb27c | 1092 | register struct stat_args *uap; |
15637ed4 RG |
1093 | int *retval; |
1094 | { | |
1095 | register struct nameidata *ndp; | |
1096 | struct stat sb; | |
1097 | int error; | |
1098 | struct nameidata nd; | |
1099 | ||
1100 | ndp = &nd; | |
1101 | ndp->ni_nameiop = LOOKUP | LOCKLEAF | FOLLOW; | |
1102 | ndp->ni_segflg = UIO_USERSPACE; | |
1103 | ndp->ni_dirp = uap->fname; | |
1104 | if (error = namei(ndp, p)) | |
1105 | return (error); | |
1106 | error = vn_stat(ndp->ni_vp, &sb, p); | |
1107 | vput(ndp->ni_vp); | |
1108 | if (error) | |
1109 | return (error); | |
1110 | error = copyout((caddr_t)&sb, (caddr_t)uap->ub, sizeof (sb)); | |
1111 | return (error); | |
1112 | } | |
1113 | ||
1114 | /* | |
1115 | * Lstat system call. | |
1116 | * This version does not follow links. | |
1117 | */ | |
3c7eb27c DG |
1118 | |
1119 | struct lstat_args { | |
1120 | char *fname; | |
1121 | struct stat *ub; | |
1122 | }; | |
1123 | ||
15637ed4 RG |
1124 | /* ARGSUSED */ |
1125 | lstat(p, uap, retval) | |
1126 | struct proc *p; | |
3c7eb27c | 1127 | register struct lstat_args *uap; |
15637ed4 RG |
1128 | int *retval; |
1129 | { | |
1130 | register struct nameidata *ndp; | |
1131 | struct stat sb; | |
1132 | int error; | |
1133 | struct nameidata nd; | |
1134 | ||
1135 | ndp = &nd; | |
1136 | ndp->ni_nameiop = LOOKUP | LOCKLEAF | NOFOLLOW; | |
1137 | ndp->ni_segflg = UIO_USERSPACE; | |
1138 | ndp->ni_dirp = uap->fname; | |
1139 | if (error = namei(ndp, p)) | |
1140 | return (error); | |
1141 | error = vn_stat(ndp->ni_vp, &sb, p); | |
1142 | vput(ndp->ni_vp); | |
1143 | if (error) | |
1144 | return (error); | |
1145 | error = copyout((caddr_t)&sb, (caddr_t)uap->ub, sizeof (sb)); | |
1146 | return (error); | |
1147 | } | |
1148 | ||
1149 | /* | |
1150 | * Return target name of a symbolic link. | |
1151 | */ | |
3c7eb27c DG |
1152 | |
1153 | struct readlink_args { | |
1154 | char *name; | |
1155 | char *buf; | |
1156 | int count; | |
1157 | }; | |
1158 | ||
15637ed4 RG |
1159 | /* ARGSUSED */ |
1160 | readlink(p, uap, retval) | |
1161 | struct proc *p; | |
3c7eb27c | 1162 | register struct readlink_args *uap; |
15637ed4 RG |
1163 | int *retval; |
1164 | { | |
1165 | register struct nameidata *ndp; | |
1166 | register struct vnode *vp; | |
1167 | struct iovec aiov; | |
1168 | struct uio auio; | |
1169 | int error; | |
1170 | struct nameidata nd; | |
1171 | ||
1172 | ndp = &nd; | |
1173 | ndp->ni_nameiop = LOOKUP | LOCKLEAF; | |
1174 | ndp->ni_segflg = UIO_USERSPACE; | |
1175 | ndp->ni_dirp = uap->name; | |
1176 | if (error = namei(ndp, p)) | |
1177 | return (error); | |
1178 | vp = ndp->ni_vp; | |
1179 | if (vp->v_type != VLNK) { | |
1180 | error = EINVAL; | |
1181 | goto out; | |
1182 | } | |
1183 | aiov.iov_base = uap->buf; | |
1184 | aiov.iov_len = uap->count; | |
1185 | auio.uio_iov = &aiov; | |
1186 | auio.uio_iovcnt = 1; | |
1187 | auio.uio_offset = 0; | |
1188 | auio.uio_rw = UIO_READ; | |
1189 | auio.uio_segflg = UIO_USERSPACE; | |
1190 | auio.uio_procp = p; | |
1191 | auio.uio_resid = uap->count; | |
1192 | error = VOP_READLINK(vp, &auio, p->p_ucred); | |
1193 | out: | |
1194 | vput(vp); | |
1195 | *retval = uap->count - auio.uio_resid; | |
1196 | return (error); | |
1197 | } | |
1198 | ||
1199 | /* | |
1200 | * Change flags of a file given path name. | |
1201 | */ | |
3c7eb27c DG |
1202 | |
1203 | struct chflags_args { | |
1204 | char *fname; | |
1205 | int flags; | |
1206 | }; | |
1207 | ||
15637ed4 RG |
1208 | /* ARGSUSED */ |
1209 | chflags(p, uap, retval) | |
1210 | struct proc *p; | |
3c7eb27c | 1211 | register struct chflags_args *uap; |
15637ed4 RG |
1212 | int *retval; |
1213 | { | |
1214 | register struct nameidata *ndp; | |
1215 | register struct vnode *vp; | |
1216 | struct vattr vattr; | |
1217 | int error; | |
1218 | struct nameidata nd; | |
1219 | ||
1220 | ndp = &nd; | |
1221 | ndp->ni_nameiop = LOOKUP | FOLLOW | LOCKLEAF; | |
1222 | ndp->ni_segflg = UIO_USERSPACE; | |
1223 | ndp->ni_dirp = uap->fname; | |
1224 | if (error = namei(ndp, p)) | |
1225 | return (error); | |
1226 | vp = ndp->ni_vp; | |
1227 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { | |
1228 | error = EROFS; | |
1229 | goto out; | |
1230 | } | |
1231 | VATTR_NULL(&vattr); | |
1232 | vattr.va_flags = uap->flags; | |
1233 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); | |
1234 | out: | |
1235 | vput(vp); | |
1236 | return (error); | |
1237 | } | |
1238 | ||
1239 | /* | |
1240 | * Change flags of a file given a file descriptor. | |
1241 | */ | |
3c7eb27c DG |
1242 | |
1243 | struct fdchflags_args { | |
1244 | int fd; | |
1245 | int flags; | |
1246 | }; | |
1247 | ||
15637ed4 RG |
1248 | /* ARGSUSED */ |
1249 | fchflags(p, uap, retval) | |
1250 | struct proc *p; | |
3c7eb27c | 1251 | register struct fdchflags_args *uap; |
15637ed4 RG |
1252 | int *retval; |
1253 | { | |
1254 | struct vattr vattr; | |
1255 | struct vnode *vp; | |
1256 | struct file *fp; | |
1257 | int error; | |
1258 | ||
1259 | if (error = getvnode(p->p_fd, uap->fd, &fp)) | |
1260 | return (error); | |
1261 | vp = (struct vnode *)fp->f_data; | |
1262 | VOP_LOCK(vp); | |
1263 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { | |
1264 | error = EROFS; | |
1265 | goto out; | |
1266 | } | |
1267 | VATTR_NULL(&vattr); | |
1268 | vattr.va_flags = uap->flags; | |
1269 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); | |
1270 | out: | |
1271 | VOP_UNLOCK(vp); | |
1272 | return (error); | |
1273 | } | |
1274 | ||
1275 | /* | |
1276 | * Change mode of a file given path name. | |
1277 | */ | |
3c7eb27c DG |
1278 | |
1279 | struct chmod_args { | |
1280 | char *fname; | |
1281 | int fmode; | |
1282 | }; | |
1283 | ||
15637ed4 RG |
1284 | /* ARGSUSED */ |
1285 | chmod(p, uap, retval) | |
1286 | struct proc *p; | |
3c7eb27c | 1287 | register struct chmod_args *uap; |
15637ed4 RG |
1288 | int *retval; |
1289 | { | |
1290 | register struct nameidata *ndp; | |
1291 | register struct vnode *vp; | |
1292 | struct vattr vattr; | |
1293 | int error; | |
1294 | struct nameidata nd; | |
1295 | ||
1296 | ndp = &nd; | |
1297 | ndp->ni_nameiop = LOOKUP | FOLLOW | LOCKLEAF; | |
1298 | ndp->ni_segflg = UIO_USERSPACE; | |
1299 | ndp->ni_dirp = uap->fname; | |
1300 | if (error = namei(ndp, p)) | |
1301 | return (error); | |
1302 | vp = ndp->ni_vp; | |
1303 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { | |
1304 | error = EROFS; | |
1305 | goto out; | |
1306 | } | |
1307 | VATTR_NULL(&vattr); | |
1308 | vattr.va_mode = uap->fmode & 07777; | |
1309 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); | |
1310 | out: | |
1311 | vput(vp); | |
1312 | return (error); | |
1313 | } | |
1314 | ||
1315 | /* | |
1316 | * Change mode of a file given a file descriptor. | |
1317 | */ | |
3c7eb27c DG |
1318 | |
1319 | struct fchmod_args { | |
1320 | int fd; | |
1321 | int fmode; | |
1322 | }; | |
1323 | ||
15637ed4 RG |
1324 | /* ARGSUSED */ |
1325 | fchmod(p, uap, retval) | |
1326 | struct proc *p; | |
3c7eb27c | 1327 | register struct fchmod_args *uap; |
15637ed4 RG |
1328 | int *retval; |
1329 | { | |
1330 | struct vattr vattr; | |
1331 | struct vnode *vp; | |
1332 | struct file *fp; | |
1333 | int error; | |
1334 | ||
1335 | if (error = getvnode(p->p_fd, uap->fd, &fp)) | |
1336 | return (error); | |
1337 | vp = (struct vnode *)fp->f_data; | |
1338 | VOP_LOCK(vp); | |
1339 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { | |
1340 | error = EROFS; | |
1341 | goto out; | |
1342 | } | |
1343 | VATTR_NULL(&vattr); | |
1344 | vattr.va_mode = uap->fmode & 07777; | |
1345 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); | |
1346 | out: | |
1347 | VOP_UNLOCK(vp); | |
1348 | return (error); | |
1349 | } | |
1350 | ||
1351 | /* | |
1352 | * Set ownership given a path name. | |
1353 | */ | |
3c7eb27c DG |
1354 | |
1355 | struct chown_args { | |
1356 | char *fname; | |
1357 | int uid; | |
1358 | int gid; | |
1359 | }; | |
1360 | ||
15637ed4 RG |
1361 | /* ARGSUSED */ |
1362 | chown(p, uap, retval) | |
1363 | struct proc *p; | |
3c7eb27c | 1364 | register struct chown_args *uap; |
15637ed4 RG |
1365 | int *retval; |
1366 | { | |
1367 | register struct nameidata *ndp; | |
1368 | register struct vnode *vp; | |
1369 | struct vattr vattr; | |
1370 | int error; | |
1371 | struct nameidata nd; | |
1372 | ||
1373 | ndp = &nd; | |
1374 | ndp->ni_nameiop = LOOKUP | NOFOLLOW | LOCKLEAF; | |
1375 | ndp->ni_segflg = UIO_USERSPACE; | |
1376 | ndp->ni_dirp = uap->fname; | |
1377 | if (error = namei(ndp, p)) | |
1378 | return (error); | |
1379 | vp = ndp->ni_vp; | |
1380 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { | |
1381 | error = EROFS; | |
1382 | goto out; | |
1383 | } | |
1384 | VATTR_NULL(&vattr); | |
1385 | vattr.va_uid = uap->uid; | |
1386 | vattr.va_gid = uap->gid; | |
1387 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); | |
1388 | out: | |
1389 | vput(vp); | |
1390 | return (error); | |
1391 | } | |
1392 | ||
1393 | /* | |
1394 | * Set ownership given a file descriptor. | |
1395 | */ | |
3c7eb27c DG |
1396 | |
1397 | struct fchown_args { | |
1398 | int fd; | |
1399 | int uid; | |
1400 | int gid; | |
1401 | }; | |
1402 | ||
15637ed4 RG |
1403 | /* ARGSUSED */ |
1404 | fchown(p, uap, retval) | |
1405 | struct proc *p; | |
3c7eb27c | 1406 | register struct fchown_args *uap; |
15637ed4 RG |
1407 | int *retval; |
1408 | { | |
1409 | struct vattr vattr; | |
1410 | struct vnode *vp; | |
1411 | struct file *fp; | |
1412 | int error; | |
1413 | ||
1414 | if (error = getvnode(p->p_fd, uap->fd, &fp)) | |
1415 | return (error); | |
1416 | vp = (struct vnode *)fp->f_data; | |
1417 | VOP_LOCK(vp); | |
1418 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { | |
1419 | error = EROFS; | |
1420 | goto out; | |
1421 | } | |
1422 | VATTR_NULL(&vattr); | |
1423 | vattr.va_uid = uap->uid; | |
1424 | vattr.va_gid = uap->gid; | |
1425 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); | |
1426 | out: | |
1427 | VOP_UNLOCK(vp); | |
1428 | return (error); | |
1429 | } | |
1430 | ||
1431 | /* | |
1432 | * Set the access and modification times of a file. | |
1433 | */ | |
3c7eb27c DG |
1434 | |
1435 | struct utimes_args { | |
1436 | char *fname; | |
1437 | struct timeval *tptr; | |
1438 | }; | |
1439 | ||
15637ed4 RG |
1440 | /* ARGSUSED */ |
1441 | utimes(p, uap, retval) | |
1442 | struct proc *p; | |
3c7eb27c | 1443 | register struct utimes_args *uap; |
15637ed4 RG |
1444 | int *retval; |
1445 | { | |
1446 | register struct nameidata *ndp; | |
1447 | register struct vnode *vp; | |
1448 | struct timeval tv[2]; | |
1449 | struct vattr vattr; | |
1450 | int error; | |
1451 | struct nameidata nd; | |
1452 | ||
1453 | if (error = copyin((caddr_t)uap->tptr, (caddr_t)tv, sizeof (tv))) | |
1454 | return (error); | |
1455 | ndp = &nd; | |
1456 | ndp->ni_nameiop = LOOKUP | FOLLOW | LOCKLEAF; | |
1457 | ndp->ni_segflg = UIO_USERSPACE; | |
1458 | ndp->ni_dirp = uap->fname; | |
1459 | if (error = namei(ndp, p)) | |
1460 | return (error); | |
1461 | vp = ndp->ni_vp; | |
1462 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { | |
1463 | error = EROFS; | |
1464 | goto out; | |
1465 | } | |
1466 | VATTR_NULL(&vattr); | |
1467 | vattr.va_atime = tv[0]; | |
1468 | vattr.va_mtime = tv[1]; | |
1469 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); | |
1470 | out: | |
1471 | vput(vp); | |
1472 | return (error); | |
1473 | } | |
1474 | ||
1475 | /* | |
1476 | * Truncate a file given its path name. | |
1477 | */ | |
3c7eb27c DG |
1478 | |
1479 | struct truncate_args { | |
1480 | char *fname; | |
1481 | off_t length; | |
1482 | }; | |
1483 | ||
15637ed4 RG |
1484 | /* ARGSUSED */ |
1485 | truncate(p, uap, retval) | |
1486 | struct proc *p; | |
3c7eb27c | 1487 | register struct truncate_args *uap; |
15637ed4 RG |
1488 | int *retval; |
1489 | { | |
1490 | register struct nameidata *ndp; | |
1491 | register struct vnode *vp; | |
1492 | struct vattr vattr; | |
1493 | int error; | |
1494 | struct nameidata nd; | |
1495 | ||
1496 | ndp = &nd; | |
1497 | ndp->ni_nameiop = LOOKUP | FOLLOW | LOCKLEAF; | |
1498 | ndp->ni_segflg = UIO_USERSPACE; | |
1499 | ndp->ni_dirp = uap->fname; | |
1500 | if (error = namei(ndp, p)) | |
1501 | return (error); | |
1502 | vp = ndp->ni_vp; | |
1503 | if (vp->v_type == VDIR) { | |
1504 | error = EISDIR; | |
1505 | goto out; | |
1506 | } | |
1507 | if ((error = vn_writechk(vp)) || | |
1508 | (error = VOP_ACCESS(vp, VWRITE, p->p_ucred, p))) | |
1509 | goto out; | |
1510 | VATTR_NULL(&vattr); | |
1511 | vattr.va_size = uap->length; | |
1512 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); | |
1513 | out: | |
1514 | vput(vp); | |
1515 | return (error); | |
1516 | } | |
1517 | ||
1518 | /* | |
1519 | * Truncate a file given a file descriptor. | |
1520 | */ | |
3c7eb27c DG |
1521 | |
1522 | struct ftruncate_args { | |
1523 | int fd; | |
1524 | off_t length; | |
1525 | }; | |
1526 | ||
15637ed4 RG |
1527 | /* ARGSUSED */ |
1528 | ftruncate(p, uap, retval) | |
1529 | struct proc *p; | |
3c7eb27c | 1530 | register struct ftruncate_args *uap; |
15637ed4 RG |
1531 | int *retval; |
1532 | { | |
1533 | struct vattr vattr; | |
1534 | struct vnode *vp; | |
1535 | struct file *fp; | |
1536 | int error; | |
1537 | ||
1538 | if (error = getvnode(p->p_fd, uap->fd, &fp)) | |
1539 | return (error); | |
1540 | if ((fp->f_flag & FWRITE) == 0) | |
1541 | return (EINVAL); | |
1542 | vp = (struct vnode *)fp->f_data; | |
1543 | VOP_LOCK(vp); | |
1544 | if (vp->v_type == VDIR) { | |
1545 | error = EISDIR; | |
1546 | goto out; | |
1547 | } | |
1548 | if (error = vn_writechk(vp)) | |
1549 | goto out; | |
1550 | VATTR_NULL(&vattr); | |
1551 | vattr.va_size = uap->length; | |
1552 | error = VOP_SETATTR(vp, &vattr, fp->f_cred, p); | |
1553 | out: | |
1554 | VOP_UNLOCK(vp); | |
1555 | return (error); | |
1556 | } | |
1557 | ||
1558 | /* | |
1559 | * Synch an open file. | |
1560 | */ | |
3c7eb27c DG |
1561 | |
1562 | struct fsync_args { | |
1563 | int fd; | |
1564 | }; | |
1565 | ||
15637ed4 RG |
1566 | /* ARGSUSED */ |
1567 | fsync(p, uap, retval) | |
1568 | struct proc *p; | |
3c7eb27c | 1569 | struct fsync_args *uap; |
15637ed4 RG |
1570 | int *retval; |
1571 | { | |
1572 | register struct vnode *vp; | |
1573 | struct file *fp; | |
1574 | int error; | |
1575 | ||
1576 | if (error = getvnode(p->p_fd, uap->fd, &fp)) | |
1577 | return (error); | |
1578 | vp = (struct vnode *)fp->f_data; | |
1579 | VOP_LOCK(vp); | |
1580 | error = VOP_FSYNC(vp, fp->f_flag, fp->f_cred, MNT_WAIT, p); | |
1581 | VOP_UNLOCK(vp); | |
1582 | return (error); | |
1583 | } | |
1584 | ||
1585 | /* | |
1586 | * Rename system call. | |
1587 | * | |
1588 | * Source and destination must either both be directories, or both | |
1589 | * not be directories. If target is a directory, it must be empty. | |
1590 | */ | |
3c7eb27c DG |
1591 | |
1592 | struct rename_args { | |
1593 | char *from; | |
1594 | char *to; | |
1595 | }; | |
1596 | ||
15637ed4 RG |
1597 | /* ARGSUSED */ |
1598 | rename(p, uap, retval) | |
1599 | struct proc *p; | |
3c7eb27c | 1600 | register struct rename_args *uap; |
15637ed4 RG |
1601 | int *retval; |
1602 | { | |
1603 | register struct vnode *tvp, *fvp, *tdvp; | |
1604 | struct nameidata fromnd, tond; | |
1605 | int error; | |
1606 | ||
1607 | fromnd.ni_nameiop = DELETE | WANTPARENT | SAVESTART; | |
1608 | fromnd.ni_segflg = UIO_USERSPACE; | |
1609 | fromnd.ni_dirp = uap->from; | |
1610 | if (error = namei(&fromnd, p)) | |
1611 | return (error); | |
1612 | fvp = fromnd.ni_vp; | |
1613 | tond.ni_nameiop = RENAME | LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; | |
1614 | tond.ni_segflg = UIO_USERSPACE; | |
1615 | tond.ni_dirp = uap->to; | |
1616 | if (error = namei(&tond, p)) { | |
1617 | VOP_ABORTOP(&fromnd); | |
1618 | vrele(fromnd.ni_dvp); | |
1619 | vrele(fvp); | |
1620 | goto out1; | |
1621 | } | |
1622 | tdvp = tond.ni_dvp; | |
1623 | tvp = tond.ni_vp; | |
1624 | if (tvp != NULL) { | |
1625 | if (fvp->v_type == VDIR && tvp->v_type != VDIR) { | |
1626 | error = ENOTDIR; | |
1627 | goto out; | |
1628 | } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { | |
1629 | error = EISDIR; | |
1630 | goto out; | |
1631 | } | |
1632 | if (fvp->v_mount != tvp->v_mount) { | |
1633 | error = EXDEV; | |
1634 | goto out; | |
1635 | } | |
1636 | } | |
1637 | if (fvp->v_mount != tdvp->v_mount) { | |
1638 | error = EXDEV; | |
1639 | goto out; | |
1640 | } | |
1641 | if (fvp == tdvp) | |
1642 | error = EINVAL; | |
1643 | /* | |
1644 | * If source is the same as the destination (that is the | |
1645 | * same inode number with the same name in the same directory), | |
1646 | * then there is nothing to do. | |
1647 | */ | |
1648 | if (fvp == tvp && fromnd.ni_dvp == tdvp && | |
1649 | fromnd.ni_namelen == tond.ni_namelen && | |
1650 | !bcmp(fromnd.ni_ptr, tond.ni_ptr, fromnd.ni_namelen)) | |
1651 | error = -1; | |
1652 | out: | |
1653 | if (!error) { | |
1654 | error = VOP_RENAME(&fromnd, &tond, p); | |
1655 | } else { | |
1656 | VOP_ABORTOP(&tond); | |
1657 | if (tdvp == tvp) | |
1658 | vrele(tdvp); | |
1659 | else | |
1660 | vput(tdvp); | |
1661 | if (tvp) | |
1662 | vput(tvp); | |
1663 | VOP_ABORTOP(&fromnd); | |
1664 | vrele(fromnd.ni_dvp); | |
1665 | vrele(fvp); | |
1666 | } | |
1667 | vrele(tond.ni_startdir); | |
1668 | FREE(tond.ni_pnbuf, M_NAMEI); | |
1669 | out1: | |
b43a13ed DG |
1670 | if (fromnd.ni_startdir) |
1671 | vrele(fromnd.ni_startdir); | |
15637ed4 RG |
1672 | FREE(fromnd.ni_pnbuf, M_NAMEI); |
1673 | if (error == -1) | |
1674 | return (0); | |
1675 | return (error); | |
1676 | } | |
1677 | ||
1678 | /* | |
1679 | * Mkdir system call. | |
1680 | */ | |
3c7eb27c DG |
1681 | |
1682 | struct mkdir_args { | |
1683 | char *name; | |
1684 | int dmode; | |
1685 | }; | |
1686 | ||
15637ed4 RG |
1687 | /* ARGSUSED */ |
1688 | mkdir(p, uap, retval) | |
1689 | struct proc *p; | |
3c7eb27c | 1690 | register struct mkdir_args *uap; |
15637ed4 RG |
1691 | int *retval; |
1692 | { | |
1693 | register struct nameidata *ndp; | |
1694 | register struct vnode *vp; | |
1695 | struct vattr vattr; | |
1696 | int error; | |
1697 | struct nameidata nd; | |
1698 | ||
1699 | ndp = &nd; | |
1700 | ndp->ni_nameiop = CREATE | LOCKPARENT; | |
1701 | ndp->ni_segflg = UIO_USERSPACE; | |
1702 | ndp->ni_dirp = uap->name; | |
1703 | if (error = namei(ndp, p)) | |
1704 | return (error); | |
1705 | vp = ndp->ni_vp; | |
1706 | if (vp != NULL) { | |
1707 | VOP_ABORTOP(ndp); | |
1708 | if (ndp->ni_dvp == vp) | |
1709 | vrele(ndp->ni_dvp); | |
1710 | else | |
1711 | vput(ndp->ni_dvp); | |
1712 | vrele(vp); | |
1713 | return (EEXIST); | |
1714 | } | |
1715 | VATTR_NULL(&vattr); | |
1716 | vattr.va_type = VDIR; | |
1717 | vattr.va_mode = (uap->dmode & 0777) &~ p->p_fd->fd_cmask; | |
1718 | error = VOP_MKDIR(ndp, &vattr, p); | |
1719 | if (!error) | |
1720 | vput(ndp->ni_vp); | |
1721 | return (error); | |
1722 | } | |
1723 | ||
1724 | /* | |
1725 | * Rmdir system call. | |
1726 | */ | |
3c7eb27c DG |
1727 | |
1728 | struct rmdir_args { | |
1729 | char *name; | |
1730 | }; | |
1731 | ||
15637ed4 RG |
1732 | /* ARGSUSED */ |
1733 | rmdir(p, uap, retval) | |
1734 | struct proc *p; | |
3c7eb27c | 1735 | struct rmdir_args *uap; |
15637ed4 RG |
1736 | int *retval; |
1737 | { | |
1738 | register struct nameidata *ndp; | |
1739 | register struct vnode *vp; | |
1740 | int error; | |
1741 | struct nameidata nd; | |
1742 | ||
1743 | ndp = &nd; | |
1744 | ndp->ni_nameiop = DELETE | LOCKPARENT | LOCKLEAF; | |
1745 | ndp->ni_segflg = UIO_USERSPACE; | |
1746 | ndp->ni_dirp = uap->name; | |
1747 | if (error = namei(ndp, p)) | |
1748 | return (error); | |
1749 | vp = ndp->ni_vp; | |
1750 | if (vp->v_type != VDIR) { | |
1751 | error = ENOTDIR; | |
1752 | goto out; | |
1753 | } | |
1754 | /* | |
1755 | * No rmdir "." please. | |
1756 | */ | |
1757 | if (ndp->ni_dvp == vp) { | |
1758 | error = EINVAL; | |
1759 | goto out; | |
1760 | } | |
1761 | /* | |
1762 | * The root of a mounted filesystem cannot be deleted. | |
1763 | */ | |
1764 | if (vp->v_flag & VROOT) | |
1765 | error = EBUSY; | |
1766 | out: | |
1767 | if (!error) { | |
1768 | error = VOP_RMDIR(ndp, p); | |
1769 | } else { | |
1770 | VOP_ABORTOP(ndp); | |
1771 | if (ndp->ni_dvp == vp) | |
1772 | vrele(ndp->ni_dvp); | |
1773 | else | |
1774 | vput(ndp->ni_dvp); | |
1775 | vput(vp); | |
1776 | } | |
1777 | return (error); | |
1778 | } | |
1779 | ||
1780 | /* | |
1781 | * Read a block of directory entries in a file system independent format. | |
1782 | */ | |
3c7eb27c DG |
1783 | |
1784 | struct getdirentries_args { | |
1785 | int fd; | |
1786 | char *buf; | |
1787 | unsigned count; | |
1788 | long *basep; | |
1789 | }; | |
1790 | ||
15637ed4 RG |
1791 | getdirentries(p, uap, retval) |
1792 | struct proc *p; | |
3c7eb27c | 1793 | register struct getdirentries_args *uap; |
15637ed4 RG |
1794 | int *retval; |
1795 | { | |
1796 | register struct vnode *vp; | |
1797 | struct file *fp; | |
1798 | struct uio auio; | |
1799 | struct iovec aiov; | |
1800 | off_t off; | |
1801 | int error, eofflag; | |
1802 | ||
1803 | if (error = getvnode(p->p_fd, uap->fd, &fp)) | |
1804 | return (error); | |
1805 | if ((fp->f_flag & FREAD) == 0) | |
1806 | return (EBADF); | |
1807 | vp = (struct vnode *)fp->f_data; | |
1808 | if (vp->v_type != VDIR) | |
1809 | return (EINVAL); | |
1810 | aiov.iov_base = uap->buf; | |
1811 | aiov.iov_len = uap->count; | |
1812 | auio.uio_iov = &aiov; | |
1813 | auio.uio_iovcnt = 1; | |
1814 | auio.uio_rw = UIO_READ; | |
1815 | auio.uio_segflg = UIO_USERSPACE; | |
1816 | auio.uio_procp = p; | |
1817 | auio.uio_resid = uap->count; | |
1818 | VOP_LOCK(vp); | |
1819 | auio.uio_offset = off = fp->f_offset; | |
1820 | error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag); | |
1821 | fp->f_offset = auio.uio_offset; | |
1822 | VOP_UNLOCK(vp); | |
1823 | if (error) | |
1824 | return (error); | |
1825 | error = copyout((caddr_t)&off, (caddr_t)uap->basep, sizeof(long)); | |
1826 | *retval = uap->count - auio.uio_resid; | |
1827 | return (error); | |
1828 | } | |
1829 | ||
1830 | /* | |
1831 | * Set the mode mask for creation of filesystem nodes. | |
1832 | */ | |
3c7eb27c DG |
1833 | |
1834 | struct umask_args { | |
1835 | int mask; | |
1836 | }; | |
1837 | ||
15637ed4 RG |
1838 | mode_t |
1839 | umask(p, uap, retval) | |
1840 | struct proc *p; | |
3c7eb27c | 1841 | struct umask_args *uap; |
15637ed4 RG |
1842 | int *retval; |
1843 | { | |
1844 | register struct filedesc *fdp = p->p_fd; | |
1845 | ||
1846 | *retval = fdp->fd_cmask; | |
1847 | fdp->fd_cmask = uap->mask & 07777; | |
1848 | return (0); | |
1849 | } | |
1850 | ||
1851 | /* | |
1852 | * Void all references to file by ripping underlying filesystem | |
1853 | * away from vnode. | |
1854 | */ | |
3c7eb27c DG |
1855 | |
1856 | struct revoke_args { | |
1857 | char *fname; | |
1858 | }; | |
1859 | ||
15637ed4 RG |
1860 | /* ARGSUSED */ |
1861 | revoke(p, uap, retval) | |
1862 | struct proc *p; | |
3c7eb27c | 1863 | register struct revoke_args *uap; |
15637ed4 RG |
1864 | int *retval; |
1865 | { | |
1866 | register struct nameidata *ndp; | |
1867 | register struct vnode *vp; | |
1868 | struct vattr vattr; | |
1869 | int error; | |
1870 | struct nameidata nd; | |
1871 | ||
1872 | ndp = &nd; | |
1873 | ndp->ni_nameiop = LOOKUP | FOLLOW; | |
1874 | ndp->ni_segflg = UIO_USERSPACE; | |
1875 | ndp->ni_dirp = uap->fname; | |
1876 | if (error = namei(ndp, p)) | |
1877 | return (error); | |
1878 | vp = ndp->ni_vp; | |
1879 | if (vp->v_type != VCHR && vp->v_type != VBLK) { | |
1880 | error = EINVAL; | |
1881 | goto out; | |
1882 | } | |
1883 | if (error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) | |
1884 | goto out; | |
1885 | if (p->p_ucred->cr_uid != vattr.va_uid && | |
1886 | (error = suser(p->p_ucred, &p->p_acflag))) | |
1887 | goto out; | |
1888 | if (vp->v_usecount > 1 || (vp->v_flag & VALIASED)) | |
1889 | vgoneall(vp); | |
1890 | out: | |
1891 | vrele(vp); | |
1892 | return (error); | |
1893 | } | |
1894 | ||
1895 | /* | |
1896 | * Convert a user file descriptor to a kernel file entry. | |
1897 | */ | |
1898 | getvnode(fdp, fdes, fpp) | |
1899 | struct filedesc *fdp; | |
1900 | struct file **fpp; | |
1901 | int fdes; | |
1902 | { | |
1903 | struct file *fp; | |
1904 | ||
1905 | if ((unsigned)fdes >= fdp->fd_nfiles || | |
1906 | (fp = fdp->fd_ofiles[fdes]) == NULL) | |
1907 | return (EBADF); | |
1908 | if (fp->f_type != DTYPE_VNODE) | |
1909 | return (EINVAL); | |
1910 | *fpp = fp; | |
1911 | return (0); | |
1912 | } |