Commit | Line | Data |
---|---|---|
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 |
e668648e | 34 | * $Id: vfs_syscalls.c,v 1.9 1994/01/19 20:27:38 guido 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 | ||
fde1aeb2 GW |
50 | static int getvnode(struct filedesc *, int, struct file **); |
51 | static int chdirec(struct nameidata *, struct proc *); | |
52 | ||
15637ed4 RG |
53 | /* |
54 | * Virtual File System System Calls | |
55 | */ | |
56 | ||
57 | /* | |
58 | * Mount system call. | |
59 | */ | |
3c7eb27c DG |
60 | |
61 | struct mount_args { | |
62 | int type; | |
63 | char *dir; | |
64 | int flags; | |
65 | caddr_t data; | |
66 | }; | |
67 | ||
15637ed4 | 68 | /* ARGSUSED */ |
4c45483e | 69 | int |
15637ed4 RG |
70 | mount(p, uap, retval) |
71 | struct proc *p; | |
3c7eb27c | 72 | register struct mount_args *uap; |
15637ed4 RG |
73 | int *retval; |
74 | { | |
75 | register struct nameidata *ndp; | |
76 | register struct vnode *vp; | |
77 | register struct mount *mp; | |
4c45483e | 78 | int error, flag = 0; |
15637ed4 RG |
79 | struct nameidata nd; |
80 | ||
81 | /* | |
82 | * Must be super user | |
83 | */ | |
84 | if (error = suser(p->p_ucred, &p->p_acflag)) | |
85 | return (error); | |
86 | /* | |
87 | * Get vnode to be covered | |
88 | */ | |
89 | ndp = &nd; | |
90 | ndp->ni_nameiop = LOOKUP | FOLLOW | LOCKLEAF; | |
91 | ndp->ni_segflg = UIO_USERSPACE; | |
92 | ndp->ni_dirp = uap->dir; | |
93 | if (error = namei(ndp, p)) | |
94 | return (error); | |
95 | vp = ndp->ni_vp; | |
96 | if (uap->flags & MNT_UPDATE) { | |
97 | if ((vp->v_flag & VROOT) == 0) { | |
98 | vput(vp); | |
99 | return (EINVAL); | |
100 | } | |
101 | mp = vp->v_mount; | |
102 | /* | |
103 | * We allow going from read-only to read-write, | |
104 | * but not from read-write to read-only. | |
105 | */ | |
106 | if ((mp->mnt_flag & MNT_RDONLY) == 0 && | |
107 | (uap->flags & MNT_RDONLY) != 0) { | |
108 | vput(vp); | |
109 | return (EOPNOTSUPP); /* Needs translation */ | |
110 | } | |
111 | flag = mp->mnt_flag; | |
112 | mp->mnt_flag |= MNT_UPDATE; | |
113 | VOP_UNLOCK(vp); | |
114 | goto update; | |
115 | } | |
116 | vinvalbuf(vp, 1); | |
117 | if (vp->v_usecount != 1) { | |
118 | vput(vp); | |
119 | return (EBUSY); | |
120 | } | |
121 | if (vp->v_type != VDIR) { | |
122 | vput(vp); | |
123 | return (ENOTDIR); | |
124 | } | |
125 | if ((unsigned long)uap->type > MOUNT_MAXTYPE || | |
126 | vfssw[uap->type] == (struct vfsops *)0) { | |
127 | vput(vp); | |
128 | return (ENODEV); | |
129 | } | |
130 | ||
131 | /* | |
132 | * Allocate and initialize the file system. | |
133 | */ | |
134 | mp = (struct mount *)malloc((u_long)sizeof(struct mount), | |
135 | M_MOUNT, M_WAITOK); | |
136 | mp->mnt_op = vfssw[uap->type]; | |
137 | mp->mnt_flag = 0; | |
138 | mp->mnt_exroot = 0; | |
139 | mp->mnt_mounth = NULLVP; | |
140 | if (error = vfs_lock(mp)) { | |
141 | free((caddr_t)mp, M_MOUNT); | |
142 | vput(vp); | |
143 | return (error); | |
144 | } | |
145 | if (vp->v_mountedhere != (struct mount *)0) { | |
146 | vfs_unlock(mp); | |
147 | free((caddr_t)mp, M_MOUNT); | |
148 | vput(vp); | |
149 | return (EBUSY); | |
150 | } | |
151 | vp->v_mountedhere = mp; | |
152 | mp->mnt_vnodecovered = vp; | |
153 | update: | |
154 | /* | |
155 | * Set the mount level flags. | |
156 | */ | |
591745ea DG |
157 | mp->mnt_flag &= |
158 | ~(MNT_RDONLY|MNT_NOSUID|MNT_NOEXEC|MNT_NODEV|MNT_SYNCHRONOUS); | |
159 | mp->mnt_flag |= uap->flags & | |
160 | (MNT_RDONLY|MNT_NOSUID|MNT_NOEXEC|MNT_NODEV|MNT_SYNCHRONOUS); | |
15637ed4 RG |
161 | /* |
162 | * Mount the filesystem. | |
163 | */ | |
164 | error = VFS_MOUNT(mp, uap->dir, uap->data, ndp, p); | |
165 | if (mp->mnt_flag & MNT_UPDATE) { | |
166 | mp->mnt_flag &= ~MNT_UPDATE; | |
167 | vrele(vp); | |
168 | if (error) | |
169 | mp->mnt_flag = flag; | |
170 | return (error); | |
171 | } | |
172 | /* | |
173 | * Put the new filesystem on the mount list after root. | |
174 | */ | |
175 | mp->mnt_next = rootfs->mnt_next; | |
176 | mp->mnt_prev = rootfs; | |
177 | rootfs->mnt_next = mp; | |
178 | mp->mnt_next->mnt_prev = mp; | |
179 | cache_purge(vp); | |
180 | if (!error) { | |
181 | VOP_UNLOCK(vp); | |
182 | vfs_unlock(mp); | |
183 | error = VFS_START(mp, 0, p); | |
184 | } else { | |
185 | vfs_remove(mp); | |
186 | free((caddr_t)mp, M_MOUNT); | |
187 | vput(vp); | |
188 | } | |
189 | return (error); | |
190 | } | |
191 | ||
192 | /* | |
193 | * Unmount system call. | |
194 | * | |
195 | * Note: unmount takes a path to the vnode mounted on as argument, | |
196 | * not special file (as before). | |
197 | */ | |
3c7eb27c DG |
198 | |
199 | struct umount_args { | |
200 | char *pathp; | |
201 | int flags; | |
202 | }; | |
203 | ||
15637ed4 | 204 | /* ARGSUSED */ |
4c45483e | 205 | int |
15637ed4 RG |
206 | unmount(p, uap, retval) |
207 | struct proc *p; | |
3c7eb27c | 208 | register struct umount_args *uap; |
15637ed4 RG |
209 | int *retval; |
210 | { | |
211 | register struct vnode *vp; | |
212 | register struct nameidata *ndp; | |
213 | struct mount *mp; | |
214 | int error; | |
215 | struct nameidata nd; | |
216 | ||
217 | /* | |
218 | * Must be super user | |
219 | */ | |
220 | if (error = suser(p->p_ucred, &p->p_acflag)) | |
221 | return (error); | |
222 | ||
223 | ndp = &nd; | |
224 | ndp->ni_nameiop = LOOKUP | LOCKLEAF | FOLLOW; | |
225 | ndp->ni_segflg = UIO_USERSPACE; | |
226 | ndp->ni_dirp = uap->pathp; | |
227 | if (error = namei(ndp, p)) | |
228 | return (error); | |
229 | vp = ndp->ni_vp; | |
230 | /* | |
231 | * Must be the root of the filesystem | |
232 | */ | |
233 | if ((vp->v_flag & VROOT) == 0) { | |
234 | vput(vp); | |
235 | return (EINVAL); | |
236 | } | |
237 | mp = vp->v_mount; | |
238 | vput(vp); | |
239 | return (dounmount(mp, uap->flags, p)); | |
240 | } | |
241 | ||
242 | /* | |
243 | * Do an unmount. | |
244 | */ | |
4c45483e | 245 | int |
15637ed4 RG |
246 | dounmount(mp, flags, p) |
247 | register struct mount *mp; | |
248 | int flags; | |
249 | struct proc *p; | |
250 | { | |
251 | struct vnode *coveredvp; | |
252 | int error; | |
253 | ||
254 | coveredvp = mp->mnt_vnodecovered; | |
255 | if (vfs_busy(mp)) | |
256 | return (EBUSY); | |
257 | mp->mnt_flag |= MNT_UNMOUNT; | |
258 | if (error = vfs_lock(mp)) | |
259 | return (error); | |
260 | ||
261 | vnode_pager_umount(mp); /* release cached vnodes */ | |
262 | cache_purgevfs(mp); /* remove cache entries for this file sys */ | |
263 | if ((error = VFS_SYNC(mp, MNT_WAIT)) == 0 || (flags & MNT_FORCE)) | |
264 | error = VFS_UNMOUNT(mp, flags, p); | |
265 | mp->mnt_flag &= ~MNT_UNMOUNT; | |
266 | vfs_unbusy(mp); | |
267 | if (error) { | |
268 | vfs_unlock(mp); | |
269 | } else { | |
270 | vrele(coveredvp); | |
271 | vfs_remove(mp); | |
272 | free((caddr_t)mp, M_MOUNT); | |
273 | } | |
274 | return (error); | |
275 | } | |
276 | ||
277 | /* | |
278 | * Sync system call. | |
279 | * Sync each mounted filesystem. | |
280 | */ | |
281 | /* ARGSUSED */ | |
4c45483e | 282 | int |
15637ed4 RG |
283 | sync(p, uap, retval) |
284 | struct proc *p; | |
285 | void *uap; | |
286 | int *retval; | |
287 | { | |
288 | register struct mount *mp; | |
289 | struct mount *omp; | |
290 | ||
b43a13ed DG |
291 | if ((mp = rootfs) == NULL) |
292 | return (0); | |
15637ed4 RG |
293 | do { |
294 | /* | |
295 | * The lock check below is to avoid races with mount | |
296 | * and unmount. | |
297 | */ | |
298 | if ((mp->mnt_flag & (MNT_MLOCK|MNT_RDONLY|MNT_MPBUSY)) == 0 && | |
299 | !vfs_busy(mp)) { | |
300 | VFS_SYNC(mp, MNT_NOWAIT); | |
301 | omp = mp; | |
302 | mp = mp->mnt_next; | |
303 | vfs_unbusy(omp); | |
304 | } else | |
305 | mp = mp->mnt_next; | |
306 | } while (mp != rootfs); | |
307 | return (0); | |
308 | } | |
309 | ||
310 | /* | |
311 | * Operate on filesystem quotas. | |
312 | */ | |
3c7eb27c DG |
313 | |
314 | struct quotactl_args { | |
315 | char *path; | |
316 | int cmd; | |
317 | int uid; | |
318 | caddr_t arg; | |
319 | }; | |
320 | ||
15637ed4 | 321 | /* ARGSUSED */ |
4c45483e | 322 | int |
15637ed4 RG |
323 | quotactl(p, uap, retval) |
324 | struct proc *p; | |
3c7eb27c | 325 | register struct quotactl_args *uap; |
15637ed4 RG |
326 | int *retval; |
327 | { | |
328 | register struct mount *mp; | |
329 | register struct nameidata *ndp; | |
330 | int error; | |
331 | struct nameidata nd; | |
332 | ||
333 | ndp = &nd; | |
334 | ndp->ni_nameiop = LOOKUP | FOLLOW; | |
335 | ndp->ni_segflg = UIO_USERSPACE; | |
336 | ndp->ni_dirp = uap->path; | |
337 | if (error = namei(ndp, p)) | |
338 | return (error); | |
339 | mp = ndp->ni_vp->v_mount; | |
340 | vrele(ndp->ni_vp); | |
341 | return (VFS_QUOTACTL(mp, uap->cmd, uap->uid, uap->arg, p)); | |
342 | } | |
343 | ||
344 | /* | |
345 | * Get filesystem statistics. | |
346 | */ | |
3c7eb27c DG |
347 | |
348 | struct statfs_args { | |
349 | char *path; | |
350 | struct statfs *buf; | |
351 | }; | |
352 | ||
15637ed4 | 353 | /* ARGSUSED */ |
4c45483e | 354 | int |
15637ed4 RG |
355 | statfs(p, uap, retval) |
356 | struct proc *p; | |
3c7eb27c | 357 | register struct statfs_args *uap; |
15637ed4 RG |
358 | int *retval; |
359 | { | |
360 | register struct mount *mp; | |
361 | register struct nameidata *ndp; | |
362 | register struct statfs *sp; | |
363 | int error; | |
364 | struct nameidata nd; | |
365 | ||
366 | ndp = &nd; | |
367 | ndp->ni_nameiop = LOOKUP | FOLLOW; | |
368 | ndp->ni_segflg = UIO_USERSPACE; | |
369 | ndp->ni_dirp = uap->path; | |
370 | if (error = namei(ndp, p)) | |
371 | return (error); | |
372 | mp = ndp->ni_vp->v_mount; | |
373 | sp = &mp->mnt_stat; | |
374 | vrele(ndp->ni_vp); | |
375 | if (error = VFS_STATFS(mp, sp, p)) | |
376 | return (error); | |
377 | sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; | |
378 | return (copyout((caddr_t)sp, (caddr_t)uap->buf, sizeof(*sp))); | |
379 | } | |
380 | ||
381 | /* | |
382 | * Get filesystem statistics. | |
383 | */ | |
3c7eb27c DG |
384 | |
385 | struct fstatfs_args { | |
386 | int fd; | |
387 | struct statfs *buf; | |
388 | }; | |
389 | ||
15637ed4 | 390 | /* ARGSUSED */ |
4c45483e | 391 | int |
15637ed4 RG |
392 | fstatfs(p, uap, retval) |
393 | struct proc *p; | |
3c7eb27c | 394 | register struct fstatfs_args *uap; |
15637ed4 RG |
395 | int *retval; |
396 | { | |
397 | struct file *fp; | |
398 | struct mount *mp; | |
399 | register struct statfs *sp; | |
400 | int error; | |
401 | ||
402 | if (error = getvnode(p->p_fd, uap->fd, &fp)) | |
403 | return (error); | |
404 | mp = ((struct vnode *)fp->f_data)->v_mount; | |
405 | sp = &mp->mnt_stat; | |
406 | if (error = VFS_STATFS(mp, sp, p)) | |
407 | return (error); | |
408 | sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; | |
409 | return (copyout((caddr_t)sp, (caddr_t)uap->buf, sizeof(*sp))); | |
410 | } | |
411 | ||
412 | /* | |
413 | * Get statistics on all filesystems. | |
414 | */ | |
3c7eb27c DG |
415 | |
416 | struct getfsstat_args { | |
417 | struct statfs *buf; | |
418 | long bufsize; | |
419 | int flags; | |
420 | }; | |
421 | ||
4c45483e | 422 | int |
15637ed4 RG |
423 | getfsstat(p, uap, retval) |
424 | struct proc *p; | |
3c7eb27c | 425 | register struct getfsstat_args *uap; |
15637ed4 RG |
426 | int *retval; |
427 | { | |
428 | register struct mount *mp; | |
429 | register struct statfs *sp; | |
430 | caddr_t sfsp; | |
431 | long count, maxcount, error; | |
432 | ||
433 | maxcount = uap->bufsize / sizeof(struct statfs); | |
434 | sfsp = (caddr_t)uap->buf; | |
435 | mp = rootfs; | |
436 | count = 0; | |
437 | do { | |
438 | if (sfsp && count < maxcount && | |
439 | ((mp->mnt_flag & MNT_MLOCK) == 0)) { | |
440 | sp = &mp->mnt_stat; | |
441 | /* | |
442 | * If MNT_NOWAIT is specified, do not refresh the | |
443 | * fsstat cache. MNT_WAIT overrides MNT_NOWAIT. | |
444 | */ | |
445 | if (((uap->flags & MNT_NOWAIT) == 0 || | |
446 | (uap->flags & MNT_WAIT)) && | |
447 | (error = VFS_STATFS(mp, sp, p))) { | |
448 | mp = mp->mnt_prev; | |
449 | continue; | |
450 | } | |
451 | sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; | |
452 | if (error = copyout((caddr_t)sp, sfsp, sizeof(*sp))) | |
453 | return (error); | |
454 | sfsp += sizeof(*sp); | |
455 | } | |
456 | count++; | |
457 | mp = mp->mnt_prev; | |
458 | } while (mp != rootfs); | |
459 | if (sfsp && count > maxcount) | |
460 | *retval = maxcount; | |
461 | else | |
462 | *retval = count; | |
463 | return (0); | |
464 | } | |
465 | ||
466 | /* | |
467 | * Change current working directory to a given file descriptor. | |
468 | */ | |
3c7eb27c DG |
469 | |
470 | struct fchdir_args { | |
471 | int fd; | |
472 | }; | |
473 | ||
15637ed4 | 474 | /* ARGSUSED */ |
4c45483e | 475 | int |
15637ed4 RG |
476 | fchdir(p, uap, retval) |
477 | struct proc *p; | |
3c7eb27c | 478 | struct fchdir_args *uap; |
15637ed4 RG |
479 | int *retval; |
480 | { | |
481 | register struct filedesc *fdp = p->p_fd; | |
482 | register struct vnode *vp; | |
483 | struct file *fp; | |
484 | int error; | |
485 | ||
486 | if (error = getvnode(fdp, uap->fd, &fp)) | |
487 | return (error); | |
488 | vp = (struct vnode *)fp->f_data; | |
489 | VOP_LOCK(vp); | |
490 | if (vp->v_type != VDIR) | |
491 | error = ENOTDIR; | |
492 | else | |
493 | error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p); | |
494 | VOP_UNLOCK(vp); | |
495 | if (error) | |
496 | return (error); | |
497 | VREF(vp); | |
498 | vrele(fdp->fd_cdir); | |
499 | fdp->fd_cdir = vp; | |
500 | return (0); | |
501 | } | |
502 | ||
503 | /* | |
504 | * Change current working directory (``.''). | |
505 | */ | |
3c7eb27c DG |
506 | |
507 | struct chdir_args { | |
508 | char *fname; | |
509 | }; | |
510 | ||
15637ed4 | 511 | /* ARGSUSED */ |
4c45483e | 512 | int |
15637ed4 RG |
513 | chdir(p, uap, retval) |
514 | struct proc *p; | |
3c7eb27c | 515 | struct chdir_args *uap; |
15637ed4 RG |
516 | int *retval; |
517 | { | |
518 | register struct nameidata *ndp; | |
519 | register struct filedesc *fdp = p->p_fd; | |
520 | int error; | |
521 | struct nameidata nd; | |
522 | ||
523 | ndp = &nd; | |
524 | ndp->ni_nameiop = LOOKUP | FOLLOW | LOCKLEAF; | |
525 | ndp->ni_segflg = UIO_USERSPACE; | |
526 | ndp->ni_dirp = uap->fname; | |
527 | if (error = chdirec(ndp, p)) | |
528 | return (error); | |
529 | vrele(fdp->fd_cdir); | |
530 | fdp->fd_cdir = ndp->ni_vp; | |
531 | return (0); | |
532 | } | |
533 | ||
534 | /* | |
535 | * Change notion of root (``/'') directory. | |
536 | */ | |
3c7eb27c DG |
537 | |
538 | struct chroot_args { | |
539 | char *fname; | |
540 | }; | |
541 | ||
15637ed4 | 542 | /* ARGSUSED */ |
4c45483e | 543 | int |
15637ed4 RG |
544 | chroot(p, uap, retval) |
545 | struct proc *p; | |
3c7eb27c | 546 | struct chroot_args *uap; |
15637ed4 RG |
547 | int *retval; |
548 | { | |
549 | register struct nameidata *ndp; | |
550 | register struct filedesc *fdp = p->p_fd; | |
551 | int error; | |
552 | struct nameidata nd; | |
553 | ||
554 | if (error = suser(p->p_ucred, &p->p_acflag)) | |
555 | return (error); | |
556 | ndp = &nd; | |
557 | ndp->ni_nameiop = LOOKUP | FOLLOW | LOCKLEAF; | |
558 | ndp->ni_segflg = UIO_USERSPACE; | |
559 | ndp->ni_dirp = uap->fname; | |
560 | if (error = chdirec(ndp, p)) | |
561 | return (error); | |
562 | if (fdp->fd_rdir != NULL) | |
563 | vrele(fdp->fd_rdir); | |
564 | fdp->fd_rdir = ndp->ni_vp; | |
565 | return (0); | |
566 | } | |
567 | ||
568 | /* | |
569 | * Common routine for chroot and chdir. | |
570 | */ | |
fde1aeb2 | 571 | static int |
15637ed4 RG |
572 | chdirec(ndp, p) |
573 | struct nameidata *ndp; | |
574 | struct proc *p; | |
575 | { | |
576 | struct vnode *vp; | |
577 | int error; | |
578 | ||
579 | if (error = namei(ndp, p)) | |
580 | return (error); | |
581 | vp = ndp->ni_vp; | |
582 | if (vp->v_type != VDIR) | |
583 | error = ENOTDIR; | |
584 | else | |
585 | error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p); | |
586 | VOP_UNLOCK(vp); | |
587 | if (error) | |
588 | vrele(vp); | |
589 | return (error); | |
590 | } | |
591 | ||
592 | /* | |
593 | * Open system call. | |
594 | * Check permissions, allocate an open file structure, | |
595 | * and call the device open routine if any. | |
596 | */ | |
3c7eb27c DG |
597 | |
598 | struct open_args { | |
599 | char *fname; | |
600 | int mode; | |
601 | int crtmode; | |
602 | }; | |
603 | ||
4c45483e | 604 | int |
15637ed4 RG |
605 | open(p, uap, retval) |
606 | struct proc *p; | |
3c7eb27c | 607 | register struct open_args *uap; |
15637ed4 RG |
608 | int *retval; |
609 | { | |
610 | struct nameidata *ndp; | |
611 | register struct filedesc *fdp = p->p_fd; | |
612 | register struct file *fp; | |
613 | register struct vnode *vp; | |
614 | int fmode, cmode; | |
615 | struct file *nfp; | |
616 | int type, indx, error; | |
617 | struct flock lf; | |
618 | struct nameidata nd; | |
619 | extern struct fileops vnops; | |
620 | ||
621 | if (error = falloc(p, &nfp, &indx)) | |
622 | return (error); | |
623 | fp = nfp; | |
624 | fmode = FFLAGS(uap->mode); | |
625 | cmode = ((uap->crtmode &~ fdp->fd_cmask) & 07777) &~ S_ISVTX; | |
626 | ndp = &nd; | |
627 | ndp->ni_segflg = UIO_USERSPACE; | |
628 | ndp->ni_dirp = uap->fname; | |
629 | p->p_dupfd = -indx - 1; /* XXX check for fdopen */ | |
630 | if (error = vn_open(ndp, p, fmode, cmode)) { | |
631 | ffree(fp); | |
632 | if (error == ENODEV && /* XXX from fdopen */ | |
3c7eb27c | 633 | ((short) p->p_dupfd) >= 0 && |
15637ed4 RG |
634 | (error = dupfdopen(fdp, indx, p->p_dupfd, fmode)) == 0) { |
635 | *retval = indx; | |
636 | return (0); | |
637 | } | |
638 | if (error == ERESTART) | |
639 | error = EINTR; | |
640 | fdp->fd_ofiles[indx] = NULL; | |
641 | return (error); | |
642 | } | |
643 | vp = ndp->ni_vp; | |
591745ea | 644 | VOP_UNLOCK(vp); |
15637ed4 RG |
645 | fp->f_flag = fmode & FMASK; |
646 | if (fmode & (O_EXLOCK | O_SHLOCK)) { | |
647 | lf.l_whence = SEEK_SET; | |
648 | lf.l_start = 0; | |
649 | lf.l_len = 0; | |
650 | if (fmode & O_EXLOCK) | |
651 | lf.l_type = F_WRLCK; | |
652 | else | |
653 | lf.l_type = F_RDLCK; | |
654 | type = F_FLOCK; | |
655 | if ((fmode & FNONBLOCK) == 0) | |
656 | type |= F_WAIT; | |
657 | if (error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type)) { | |
15637ed4 RG |
658 | (void) vn_close(vp, fp->f_flag, fp->f_cred, p); |
659 | ffree(fp); | |
660 | fdp->fd_ofiles[indx] = NULL; | |
661 | return (error); | |
662 | } | |
663 | fp->f_flag |= FHASLOCK; | |
664 | } | |
15637ed4 RG |
665 | fp->f_type = DTYPE_VNODE; |
666 | fp->f_ops = &vnops; | |
667 | fp->f_data = (caddr_t)vp; | |
668 | *retval = indx; | |
669 | return (0); | |
670 | } | |
671 | ||
672 | #ifdef COMPAT_43 | |
673 | /* | |
674 | * Creat system call. | |
675 | */ | |
3c7eb27c DG |
676 | |
677 | struct ocreat_args { | |
678 | char *fname; | |
679 | int fmode; | |
680 | }; | |
681 | ||
4c45483e | 682 | int |
15637ed4 RG |
683 | ocreat(p, uap, retval) |
684 | struct proc *p; | |
3c7eb27c | 685 | register struct ocreat_args *uap; |
15637ed4 RG |
686 | int *retval; |
687 | { | |
688 | struct newargs { | |
689 | char *fname; | |
690 | int mode; | |
691 | int crtmode; | |
692 | } openuap; | |
693 | ||
694 | openuap.fname = uap->fname; | |
695 | openuap.crtmode = uap->fmode; | |
696 | openuap.mode = O_WRONLY | O_CREAT | O_TRUNC; | |
697 | return (open(p, (struct args *)&openuap, retval)); | |
698 | } | |
699 | #endif /* COMPAT_43 */ | |
700 | ||
701 | /* | |
702 | * Mknod system call. | |
703 | */ | |
3c7eb27c DG |
704 | |
705 | struct mknod_args { | |
706 | char *fname; | |
707 | int fmode; | |
708 | int dev; | |
709 | }; | |
710 | ||
15637ed4 | 711 | /* ARGSUSED */ |
4c45483e | 712 | int |
15637ed4 RG |
713 | mknod(p, uap, retval) |
714 | struct proc *p; | |
3c7eb27c | 715 | register struct mknod_args *uap; |
15637ed4 RG |
716 | int *retval; |
717 | { | |
718 | register struct nameidata *ndp; | |
719 | register struct vnode *vp; | |
720 | struct vattr vattr; | |
721 | int error; | |
722 | struct nameidata nd; | |
723 | ||
724 | if (error = suser(p->p_ucred, &p->p_acflag)) | |
725 | return (error); | |
726 | ndp = &nd; | |
727 | ndp->ni_nameiop = CREATE | LOCKPARENT; | |
728 | ndp->ni_segflg = UIO_USERSPACE; | |
729 | ndp->ni_dirp = uap->fname; | |
730 | if (error = namei(ndp, p)) | |
731 | return (error); | |
732 | vp = ndp->ni_vp; | |
733 | if (vp != NULL) { | |
734 | error = EEXIST; | |
735 | goto out; | |
736 | } | |
737 | VATTR_NULL(&vattr); | |
738 | switch (uap->fmode & S_IFMT) { | |
739 | ||
740 | case S_IFMT: /* used by badsect to flag bad sectors */ | |
741 | vattr.va_type = VBAD; | |
742 | break; | |
743 | case S_IFCHR: | |
744 | vattr.va_type = VCHR; | |
745 | break; | |
746 | case S_IFBLK: | |
747 | vattr.va_type = VBLK; | |
748 | break; | |
749 | default: | |
750 | error = EINVAL; | |
751 | goto out; | |
752 | } | |
753 | vattr.va_mode = (uap->fmode & 07777) &~ p->p_fd->fd_cmask; | |
754 | vattr.va_rdev = uap->dev; | |
755 | out: | |
756 | if (!error) { | |
757 | error = VOP_MKNOD(ndp, &vattr, p->p_ucred, p); | |
758 | } else { | |
759 | VOP_ABORTOP(ndp); | |
760 | if (ndp->ni_dvp == vp) | |
761 | vrele(ndp->ni_dvp); | |
762 | else | |
763 | vput(ndp->ni_dvp); | |
764 | if (vp) | |
765 | vrele(vp); | |
766 | } | |
767 | return (error); | |
768 | } | |
769 | ||
770 | /* | |
771 | * Mkfifo system call. | |
772 | */ | |
3c7eb27c DG |
773 | |
774 | struct mkfifo_args { | |
775 | char *fname; | |
776 | int fmode; | |
777 | }; | |
778 | ||
15637ed4 | 779 | /* ARGSUSED */ |
4c45483e | 780 | int |
15637ed4 RG |
781 | mkfifo(p, uap, retval) |
782 | struct proc *p; | |
3c7eb27c | 783 | register struct mkfifo_args *uap; |
15637ed4 RG |
784 | int *retval; |
785 | { | |
786 | register struct nameidata *ndp; | |
787 | struct vattr vattr; | |
788 | int error; | |
789 | struct nameidata nd; | |
790 | ||
791 | #ifndef FIFO | |
792 | return (EOPNOTSUPP); | |
793 | #else | |
794 | ndp = &nd; | |
795 | ndp->ni_nameiop = CREATE | LOCKPARENT; | |
796 | ndp->ni_segflg = UIO_USERSPACE; | |
797 | ndp->ni_dirp = uap->fname; | |
798 | if (error = namei(ndp, p)) | |
799 | return (error); | |
800 | if (ndp->ni_vp != NULL) { | |
801 | VOP_ABORTOP(ndp); | |
802 | if (ndp->ni_dvp == ndp->ni_vp) | |
803 | vrele(ndp->ni_dvp); | |
804 | else | |
805 | vput(ndp->ni_dvp); | |
806 | vrele(ndp->ni_vp); | |
807 | return (EEXIST); | |
808 | } | |
809 | VATTR_NULL(&vattr); | |
810 | vattr.va_type = VFIFO; | |
811 | vattr.va_mode = (uap->fmode & 07777) &~ p->p_fd->fd_cmask; | |
812 | return (VOP_MKNOD(ndp, &vattr, p->p_ucred, p)); | |
813 | #endif /* FIFO */ | |
814 | } | |
815 | ||
816 | /* | |
817 | * Link system call. | |
818 | */ | |
3c7eb27c DG |
819 | |
820 | struct link_args { | |
821 | char *target; | |
822 | char *linkname; | |
823 | }; | |
824 | ||
15637ed4 | 825 | /* ARGSUSED */ |
4c45483e | 826 | int |
15637ed4 RG |
827 | link(p, uap, retval) |
828 | struct proc *p; | |
3c7eb27c | 829 | register struct link_args *uap; |
15637ed4 RG |
830 | int *retval; |
831 | { | |
832 | register struct nameidata *ndp; | |
833 | register struct vnode *vp, *xp; | |
834 | int error; | |
835 | struct nameidata nd; | |
836 | ||
837 | ndp = &nd; | |
838 | ndp->ni_nameiop = LOOKUP | FOLLOW; | |
839 | ndp->ni_segflg = UIO_USERSPACE; | |
840 | ndp->ni_dirp = uap->target; | |
841 | if (error = namei(ndp, p)) | |
842 | return (error); | |
843 | vp = ndp->ni_vp; | |
844 | if (vp->v_type == VDIR && | |
845 | (error = suser(p->p_ucred, &p->p_acflag))) | |
846 | goto out1; | |
847 | ndp->ni_nameiop = CREATE | LOCKPARENT; | |
848 | ndp->ni_dirp = (caddr_t)uap->linkname; | |
849 | if (error = namei(ndp, p)) | |
850 | goto out1; | |
851 | xp = ndp->ni_vp; | |
852 | if (xp != NULL) { | |
853 | error = EEXIST; | |
854 | goto out; | |
855 | } | |
856 | xp = ndp->ni_dvp; | |
857 | if (vp->v_mount != xp->v_mount) | |
858 | error = EXDEV; | |
859 | out: | |
860 | if (!error) { | |
861 | error = VOP_LINK(vp, ndp, p); | |
862 | } else { | |
863 | VOP_ABORTOP(ndp); | |
864 | if (ndp->ni_dvp == ndp->ni_vp) | |
865 | vrele(ndp->ni_dvp); | |
866 | else | |
867 | vput(ndp->ni_dvp); | |
868 | if (ndp->ni_vp) | |
869 | vrele(ndp->ni_vp); | |
870 | } | |
871 | out1: | |
872 | vrele(vp); | |
873 | return (error); | |
874 | } | |
875 | ||
876 | /* | |
877 | * Make a symbolic link. | |
878 | */ | |
3c7eb27c DG |
879 | |
880 | struct symlink_args { | |
881 | char *target; | |
882 | char *linkname; | |
883 | }; | |
884 | ||
15637ed4 | 885 | /* ARGSUSED */ |
4c45483e | 886 | int |
15637ed4 RG |
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 | 933 | /* ARGSUSED */ |
4c45483e | 934 | int |
15637ed4 RG |
935 | unlink(p, uap, retval) |
936 | struct proc *p; | |
3c7eb27c | 937 | struct unlink_args *uap; |
15637ed4 RG |
938 | int *retval; |
939 | { | |
940 | register struct nameidata *ndp; | |
941 | register struct vnode *vp; | |
942 | int error; | |
943 | struct nameidata nd; | |
944 | ||
945 | ndp = &nd; | |
946 | ndp->ni_nameiop = DELETE | LOCKPARENT | LOCKLEAF; | |
947 | ndp->ni_segflg = UIO_USERSPACE; | |
948 | ndp->ni_dirp = uap->fname; | |
949 | if (error = namei(ndp, p)) | |
950 | return (error); | |
951 | vp = ndp->ni_vp; | |
952 | if (vp->v_type == VDIR && | |
953 | (error = suser(p->p_ucred, &p->p_acflag))) | |
954 | goto out; | |
955 | /* | |
956 | * The root of a mounted filesystem cannot be deleted. | |
957 | */ | |
958 | if (vp->v_flag & VROOT) { | |
959 | error = EBUSY; | |
960 | goto out; | |
961 | } | |
962 | (void) vnode_pager_uncache(vp); | |
963 | out: | |
964 | if (!error) { | |
965 | error = VOP_REMOVE(ndp, p); | |
966 | } else { | |
967 | VOP_ABORTOP(ndp); | |
968 | if (ndp->ni_dvp == vp) | |
969 | vrele(ndp->ni_dvp); | |
970 | else | |
971 | vput(ndp->ni_dvp); | |
972 | vput(vp); | |
973 | } | |
974 | return (error); | |
975 | } | |
976 | ||
977 | /* | |
978 | * Seek system call. | |
979 | */ | |
3c7eb27c DG |
980 | |
981 | struct lseek_args { | |
982 | int fdes; | |
983 | off_t off; | |
984 | int sbase; | |
985 | }; | |
986 | ||
4c45483e | 987 | int |
15637ed4 RG |
988 | lseek(p, uap, retval) |
989 | struct proc *p; | |
3c7eb27c | 990 | register struct lseek_args *uap; |
15637ed4 RG |
991 | off_t *retval; |
992 | { | |
993 | struct ucred *cred = p->p_ucred; | |
994 | register struct filedesc *fdp = p->p_fd; | |
995 | register struct file *fp; | |
996 | struct vattr vattr; | |
997 | int error; | |
998 | ||
999 | if ((unsigned)uap->fdes >= fdp->fd_nfiles || | |
1000 | (fp = fdp->fd_ofiles[uap->fdes]) == NULL) | |
1001 | return (EBADF); | |
1002 | if (fp->f_type != DTYPE_VNODE) | |
1003 | return (ESPIPE); | |
1004 | switch (uap->sbase) { | |
1005 | ||
1006 | case L_INCR: | |
1007 | fp->f_offset += uap->off; | |
1008 | break; | |
1009 | ||
1010 | case L_XTND: | |
1011 | if (error = VOP_GETATTR((struct vnode *)fp->f_data, | |
1012 | &vattr, cred, p)) | |
1013 | return (error); | |
1014 | fp->f_offset = uap->off + vattr.va_size; | |
1015 | break; | |
1016 | ||
1017 | case L_SET: | |
1018 | fp->f_offset = uap->off; | |
1019 | break; | |
1020 | ||
1021 | default: | |
1022 | return (EINVAL); | |
1023 | } | |
1024 | *retval = fp->f_offset; | |
1025 | return (0); | |
1026 | } | |
1027 | ||
1028 | /* | |
1029 | * Check access permissions. | |
1030 | */ | |
3c7eb27c DG |
1031 | |
1032 | struct saccess_args { | |
1033 | char *fname; | |
1034 | int fmode; | |
1035 | }; | |
1036 | ||
15637ed4 | 1037 | /* ARGSUSED */ |
4c45483e | 1038 | int |
15637ed4 RG |
1039 | saccess(p, uap, retval) |
1040 | struct proc *p; | |
3c7eb27c | 1041 | register struct saccess_args *uap; |
15637ed4 RG |
1042 | int *retval; |
1043 | { | |
1044 | register struct nameidata *ndp; | |
1045 | register struct ucred *cred = p->p_ucred; | |
1046 | register struct vnode *vp; | |
1047 | int error, mode, svuid, svgid; | |
1048 | struct nameidata nd; | |
1049 | ||
1050 | ndp = &nd; | |
1051 | svuid = cred->cr_uid; | |
1052 | svgid = cred->cr_groups[0]; | |
1053 | cred->cr_uid = p->p_cred->p_ruid; | |
1054 | cred->cr_groups[0] = p->p_cred->p_rgid; | |
1055 | ndp->ni_nameiop = LOOKUP | FOLLOW | LOCKLEAF; | |
1056 | ndp->ni_segflg = UIO_USERSPACE; | |
1057 | ndp->ni_dirp = uap->fname; | |
1058 | if (error = namei(ndp, p)) | |
1059 | goto out1; | |
1060 | vp = ndp->ni_vp; | |
1061 | /* | |
1062 | * fmode == 0 means only check for exist | |
1063 | */ | |
1064 | if (uap->fmode) { | |
1065 | mode = 0; | |
1066 | if (uap->fmode & R_OK) | |
1067 | mode |= VREAD; | |
1068 | if (uap->fmode & W_OK) | |
1069 | mode |= VWRITE; | |
1070 | if (uap->fmode & X_OK) | |
1071 | mode |= VEXEC; | |
1072 | if ((mode & VWRITE) == 0 || (error = vn_writechk(vp)) == 0) | |
1073 | error = VOP_ACCESS(vp, mode, cred, p); | |
1074 | } | |
1075 | vput(vp); | |
1076 | out1: | |
1077 | cred->cr_uid = svuid; | |
1078 | cred->cr_groups[0] = svgid; | |
1079 | return (error); | |
1080 | } | |
1081 | ||
1082 | /* | |
1083 | * Stat system call. | |
1084 | * This version follows links. | |
1085 | */ | |
3c7eb27c DG |
1086 | |
1087 | struct stat_args { | |
1088 | char *fname; | |
1089 | struct stat *ub; | |
1090 | }; | |
1091 | ||
15637ed4 | 1092 | /* ARGSUSED */ |
4c45483e | 1093 | int |
15637ed4 RG |
1094 | stat(p, uap, retval) |
1095 | struct proc *p; | |
3c7eb27c | 1096 | register struct stat_args *uap; |
15637ed4 RG |
1097 | int *retval; |
1098 | { | |
1099 | register struct nameidata *ndp; | |
1100 | struct stat sb; | |
1101 | int error; | |
1102 | struct nameidata nd; | |
1103 | ||
1104 | ndp = &nd; | |
1105 | ndp->ni_nameiop = LOOKUP | LOCKLEAF | FOLLOW; | |
1106 | ndp->ni_segflg = UIO_USERSPACE; | |
1107 | ndp->ni_dirp = uap->fname; | |
1108 | if (error = namei(ndp, p)) | |
1109 | return (error); | |
1110 | error = vn_stat(ndp->ni_vp, &sb, p); | |
1111 | vput(ndp->ni_vp); | |
1112 | if (error) | |
1113 | return (error); | |
1114 | error = copyout((caddr_t)&sb, (caddr_t)uap->ub, sizeof (sb)); | |
1115 | return (error); | |
1116 | } | |
1117 | ||
1118 | /* | |
1119 | * Lstat system call. | |
1120 | * This version does not follow links. | |
1121 | */ | |
3c7eb27c DG |
1122 | |
1123 | struct lstat_args { | |
1124 | char *fname; | |
1125 | struct stat *ub; | |
1126 | }; | |
1127 | ||
15637ed4 | 1128 | /* ARGSUSED */ |
4c45483e | 1129 | int |
15637ed4 RG |
1130 | lstat(p, uap, retval) |
1131 | struct proc *p; | |
3c7eb27c | 1132 | register struct lstat_args *uap; |
15637ed4 RG |
1133 | int *retval; |
1134 | { | |
1135 | register struct nameidata *ndp; | |
1136 | struct stat sb; | |
1137 | int error; | |
1138 | struct nameidata nd; | |
1139 | ||
1140 | ndp = &nd; | |
1141 | ndp->ni_nameiop = LOOKUP | LOCKLEAF | NOFOLLOW; | |
1142 | ndp->ni_segflg = UIO_USERSPACE; | |
1143 | ndp->ni_dirp = uap->fname; | |
1144 | if (error = namei(ndp, p)) | |
1145 | return (error); | |
1146 | error = vn_stat(ndp->ni_vp, &sb, p); | |
1147 | vput(ndp->ni_vp); | |
1148 | if (error) | |
1149 | return (error); | |
1150 | error = copyout((caddr_t)&sb, (caddr_t)uap->ub, sizeof (sb)); | |
1151 | return (error); | |
1152 | } | |
1153 | ||
1154 | /* | |
1155 | * Return target name of a symbolic link. | |
1156 | */ | |
3c7eb27c DG |
1157 | |
1158 | struct readlink_args { | |
1159 | char *name; | |
1160 | char *buf; | |
1161 | int count; | |
1162 | }; | |
1163 | ||
15637ed4 | 1164 | /* ARGSUSED */ |
4c45483e | 1165 | int |
15637ed4 RG |
1166 | readlink(p, uap, retval) |
1167 | struct proc *p; | |
3c7eb27c | 1168 | register struct readlink_args *uap; |
15637ed4 RG |
1169 | int *retval; |
1170 | { | |
1171 | register struct nameidata *ndp; | |
1172 | register struct vnode *vp; | |
1173 | struct iovec aiov; | |
1174 | struct uio auio; | |
1175 | int error; | |
1176 | struct nameidata nd; | |
1177 | ||
1178 | ndp = &nd; | |
1179 | ndp->ni_nameiop = LOOKUP | LOCKLEAF; | |
1180 | ndp->ni_segflg = UIO_USERSPACE; | |
1181 | ndp->ni_dirp = uap->name; | |
1182 | if (error = namei(ndp, p)) | |
1183 | return (error); | |
1184 | vp = ndp->ni_vp; | |
1185 | if (vp->v_type != VLNK) { | |
1186 | error = EINVAL; | |
1187 | goto out; | |
1188 | } | |
1189 | aiov.iov_base = uap->buf; | |
1190 | aiov.iov_len = uap->count; | |
1191 | auio.uio_iov = &aiov; | |
1192 | auio.uio_iovcnt = 1; | |
1193 | auio.uio_offset = 0; | |
1194 | auio.uio_rw = UIO_READ; | |
1195 | auio.uio_segflg = UIO_USERSPACE; | |
1196 | auio.uio_procp = p; | |
1197 | auio.uio_resid = uap->count; | |
1198 | error = VOP_READLINK(vp, &auio, p->p_ucred); | |
1199 | out: | |
1200 | vput(vp); | |
1201 | *retval = uap->count - auio.uio_resid; | |
1202 | return (error); | |
1203 | } | |
1204 | ||
1205 | /* | |
1206 | * Change flags of a file given path name. | |
1207 | */ | |
3c7eb27c DG |
1208 | |
1209 | struct chflags_args { | |
1210 | char *fname; | |
1211 | int flags; | |
1212 | }; | |
1213 | ||
15637ed4 | 1214 | /* ARGSUSED */ |
4c45483e | 1215 | int |
15637ed4 RG |
1216 | chflags(p, uap, retval) |
1217 | struct proc *p; | |
3c7eb27c | 1218 | register struct chflags_args *uap; |
15637ed4 RG |
1219 | int *retval; |
1220 | { | |
1221 | register struct nameidata *ndp; | |
1222 | register struct vnode *vp; | |
1223 | struct vattr vattr; | |
1224 | int error; | |
1225 | struct nameidata nd; | |
1226 | ||
1227 | ndp = &nd; | |
1228 | ndp->ni_nameiop = LOOKUP | FOLLOW | LOCKLEAF; | |
1229 | ndp->ni_segflg = UIO_USERSPACE; | |
1230 | ndp->ni_dirp = uap->fname; | |
1231 | if (error = namei(ndp, p)) | |
1232 | return (error); | |
1233 | vp = ndp->ni_vp; | |
1234 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { | |
1235 | error = EROFS; | |
1236 | goto out; | |
1237 | } | |
1238 | VATTR_NULL(&vattr); | |
1239 | vattr.va_flags = uap->flags; | |
1240 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); | |
1241 | out: | |
1242 | vput(vp); | |
1243 | return (error); | |
1244 | } | |
1245 | ||
1246 | /* | |
1247 | * Change flags of a file given a file descriptor. | |
1248 | */ | |
3c7eb27c DG |
1249 | |
1250 | struct fdchflags_args { | |
1251 | int fd; | |
1252 | int flags; | |
1253 | }; | |
1254 | ||
15637ed4 | 1255 | /* ARGSUSED */ |
4c45483e | 1256 | int |
15637ed4 RG |
1257 | fchflags(p, uap, retval) |
1258 | struct proc *p; | |
3c7eb27c | 1259 | register struct fdchflags_args *uap; |
15637ed4 RG |
1260 | int *retval; |
1261 | { | |
1262 | struct vattr vattr; | |
1263 | struct vnode *vp; | |
1264 | struct file *fp; | |
1265 | int error; | |
1266 | ||
1267 | if (error = getvnode(p->p_fd, uap->fd, &fp)) | |
1268 | return (error); | |
1269 | vp = (struct vnode *)fp->f_data; | |
1270 | VOP_LOCK(vp); | |
1271 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { | |
1272 | error = EROFS; | |
1273 | goto out; | |
1274 | } | |
1275 | VATTR_NULL(&vattr); | |
1276 | vattr.va_flags = uap->flags; | |
1277 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); | |
1278 | out: | |
1279 | VOP_UNLOCK(vp); | |
1280 | return (error); | |
1281 | } | |
1282 | ||
1283 | /* | |
1284 | * Change mode of a file given path name. | |
1285 | */ | |
3c7eb27c DG |
1286 | |
1287 | struct chmod_args { | |
1288 | char *fname; | |
1289 | int fmode; | |
1290 | }; | |
1291 | ||
15637ed4 | 1292 | /* ARGSUSED */ |
4c45483e | 1293 | int |
15637ed4 RG |
1294 | chmod(p, uap, retval) |
1295 | struct proc *p; | |
3c7eb27c | 1296 | register struct chmod_args *uap; |
15637ed4 RG |
1297 | int *retval; |
1298 | { | |
1299 | register struct nameidata *ndp; | |
1300 | register struct vnode *vp; | |
1301 | struct vattr vattr; | |
1302 | int error; | |
1303 | struct nameidata nd; | |
1304 | ||
1305 | ndp = &nd; | |
1306 | ndp->ni_nameiop = LOOKUP | FOLLOW | LOCKLEAF; | |
1307 | ndp->ni_segflg = UIO_USERSPACE; | |
1308 | ndp->ni_dirp = uap->fname; | |
1309 | if (error = namei(ndp, p)) | |
1310 | return (error); | |
1311 | vp = ndp->ni_vp; | |
1312 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { | |
1313 | error = EROFS; | |
1314 | goto out; | |
1315 | } | |
1316 | VATTR_NULL(&vattr); | |
1317 | vattr.va_mode = uap->fmode & 07777; | |
1318 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); | |
1319 | out: | |
1320 | vput(vp); | |
1321 | return (error); | |
1322 | } | |
1323 | ||
1324 | /* | |
1325 | * Change mode of a file given a file descriptor. | |
1326 | */ | |
3c7eb27c DG |
1327 | |
1328 | struct fchmod_args { | |
1329 | int fd; | |
1330 | int fmode; | |
1331 | }; | |
1332 | ||
15637ed4 | 1333 | /* ARGSUSED */ |
4c45483e | 1334 | int |
15637ed4 RG |
1335 | fchmod(p, uap, retval) |
1336 | struct proc *p; | |
3c7eb27c | 1337 | register struct fchmod_args *uap; |
15637ed4 RG |
1338 | int *retval; |
1339 | { | |
1340 | struct vattr vattr; | |
1341 | struct vnode *vp; | |
1342 | struct file *fp; | |
1343 | int error; | |
1344 | ||
1345 | if (error = getvnode(p->p_fd, uap->fd, &fp)) | |
1346 | return (error); | |
1347 | vp = (struct vnode *)fp->f_data; | |
1348 | VOP_LOCK(vp); | |
1349 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { | |
1350 | error = EROFS; | |
1351 | goto out; | |
1352 | } | |
1353 | VATTR_NULL(&vattr); | |
1354 | vattr.va_mode = uap->fmode & 07777; | |
1355 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); | |
1356 | out: | |
1357 | VOP_UNLOCK(vp); | |
1358 | return (error); | |
1359 | } | |
1360 | ||
1361 | /* | |
1362 | * Set ownership given a path name. | |
1363 | */ | |
3c7eb27c DG |
1364 | |
1365 | struct chown_args { | |
1366 | char *fname; | |
1367 | int uid; | |
1368 | int gid; | |
1369 | }; | |
1370 | ||
15637ed4 | 1371 | /* ARGSUSED */ |
4c45483e | 1372 | int |
15637ed4 RG |
1373 | chown(p, uap, retval) |
1374 | struct proc *p; | |
3c7eb27c | 1375 | register struct chown_args *uap; |
15637ed4 RG |
1376 | int *retval; |
1377 | { | |
1378 | register struct nameidata *ndp; | |
1379 | register struct vnode *vp; | |
1380 | struct vattr vattr; | |
1381 | int error; | |
1382 | struct nameidata nd; | |
1383 | ||
1384 | ndp = &nd; | |
1385 | ndp->ni_nameiop = LOOKUP | NOFOLLOW | LOCKLEAF; | |
1386 | ndp->ni_segflg = UIO_USERSPACE; | |
1387 | ndp->ni_dirp = uap->fname; | |
1388 | if (error = namei(ndp, p)) | |
1389 | return (error); | |
1390 | vp = ndp->ni_vp; | |
1391 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { | |
1392 | error = EROFS; | |
1393 | goto out; | |
1394 | } | |
1395 | VATTR_NULL(&vattr); | |
1396 | vattr.va_uid = uap->uid; | |
1397 | vattr.va_gid = uap->gid; | |
1398 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); | |
1399 | out: | |
1400 | vput(vp); | |
1401 | return (error); | |
1402 | } | |
1403 | ||
1404 | /* | |
1405 | * Set ownership given a file descriptor. | |
1406 | */ | |
3c7eb27c DG |
1407 | |
1408 | struct fchown_args { | |
1409 | int fd; | |
1410 | int uid; | |
1411 | int gid; | |
1412 | }; | |
1413 | ||
15637ed4 | 1414 | /* ARGSUSED */ |
4c45483e | 1415 | int |
15637ed4 RG |
1416 | fchown(p, uap, retval) |
1417 | struct proc *p; | |
3c7eb27c | 1418 | register struct fchown_args *uap; |
15637ed4 RG |
1419 | int *retval; |
1420 | { | |
1421 | struct vattr vattr; | |
1422 | struct vnode *vp; | |
1423 | struct file *fp; | |
1424 | int error; | |
1425 | ||
1426 | if (error = getvnode(p->p_fd, uap->fd, &fp)) | |
1427 | return (error); | |
1428 | vp = (struct vnode *)fp->f_data; | |
1429 | VOP_LOCK(vp); | |
1430 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { | |
1431 | error = EROFS; | |
1432 | goto out; | |
1433 | } | |
1434 | VATTR_NULL(&vattr); | |
1435 | vattr.va_uid = uap->uid; | |
1436 | vattr.va_gid = uap->gid; | |
1437 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); | |
1438 | out: | |
1439 | VOP_UNLOCK(vp); | |
1440 | return (error); | |
1441 | } | |
1442 | ||
1443 | /* | |
1444 | * Set the access and modification times of a file. | |
1445 | */ | |
3c7eb27c DG |
1446 | |
1447 | struct utimes_args { | |
1448 | char *fname; | |
1449 | struct timeval *tptr; | |
1450 | }; | |
1451 | ||
15637ed4 | 1452 | /* ARGSUSED */ |
4c45483e | 1453 | int |
15637ed4 RG |
1454 | utimes(p, uap, retval) |
1455 | struct proc *p; | |
3c7eb27c | 1456 | register struct utimes_args *uap; |
15637ed4 RG |
1457 | int *retval; |
1458 | { | |
1459 | register struct nameidata *ndp; | |
1460 | register struct vnode *vp; | |
1461 | struct timeval tv[2]; | |
1462 | struct vattr vattr; | |
1463 | int error; | |
1464 | struct nameidata nd; | |
1465 | ||
e668648e | 1466 | VATTR_NULL(&vattr); |
4b8139e5 GR |
1467 | if ((caddr_t)uap->tptr == NULL) { |
1468 | microtime(&tv[0]); | |
1469 | tv[1] = tv[0]; | |
e668648e C |
1470 | vattr.va_vaflags |= VA_UTIMES_NULL; |
1471 | } else if (error = copyin((caddr_t)uap->tptr, (caddr_t)tv, sizeof (tv))) | |
1472 | return (error); | |
15637ed4 RG |
1473 | ndp = &nd; |
1474 | ndp->ni_nameiop = LOOKUP | FOLLOW | LOCKLEAF; | |
1475 | ndp->ni_segflg = UIO_USERSPACE; | |
1476 | ndp->ni_dirp = uap->fname; | |
1477 | if (error = namei(ndp, p)) | |
1478 | return (error); | |
1479 | vp = ndp->ni_vp; | |
1480 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { | |
1481 | error = EROFS; | |
1482 | goto out; | |
1483 | } | |
15637ed4 RG |
1484 | vattr.va_atime = tv[0]; |
1485 | vattr.va_mtime = tv[1]; | |
1486 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); | |
1487 | out: | |
1488 | vput(vp); | |
1489 | return (error); | |
1490 | } | |
1491 | ||
1492 | /* | |
1493 | * Truncate a file given its path name. | |
1494 | */ | |
3c7eb27c DG |
1495 | |
1496 | struct truncate_args { | |
1497 | char *fname; | |
1498 | off_t length; | |
1499 | }; | |
1500 | ||
15637ed4 | 1501 | /* ARGSUSED */ |
4c45483e | 1502 | int |
15637ed4 RG |
1503 | truncate(p, uap, retval) |
1504 | struct proc *p; | |
3c7eb27c | 1505 | register struct truncate_args *uap; |
15637ed4 RG |
1506 | int *retval; |
1507 | { | |
1508 | register struct nameidata *ndp; | |
1509 | register struct vnode *vp; | |
1510 | struct vattr vattr; | |
1511 | int error; | |
1512 | struct nameidata nd; | |
1513 | ||
1514 | ndp = &nd; | |
1515 | ndp->ni_nameiop = LOOKUP | FOLLOW | LOCKLEAF; | |
1516 | ndp->ni_segflg = UIO_USERSPACE; | |
1517 | ndp->ni_dirp = uap->fname; | |
1518 | if (error = namei(ndp, p)) | |
1519 | return (error); | |
1520 | vp = ndp->ni_vp; | |
1521 | if (vp->v_type == VDIR) { | |
1522 | error = EISDIR; | |
1523 | goto out; | |
1524 | } | |
1525 | if ((error = vn_writechk(vp)) || | |
1526 | (error = VOP_ACCESS(vp, VWRITE, p->p_ucred, p))) | |
1527 | goto out; | |
1528 | VATTR_NULL(&vattr); | |
1529 | vattr.va_size = uap->length; | |
1530 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); | |
1531 | out: | |
1532 | vput(vp); | |
1533 | return (error); | |
1534 | } | |
1535 | ||
1536 | /* | |
1537 | * Truncate a file given a file descriptor. | |
1538 | */ | |
3c7eb27c DG |
1539 | |
1540 | struct ftruncate_args { | |
1541 | int fd; | |
1542 | off_t length; | |
1543 | }; | |
1544 | ||
15637ed4 | 1545 | /* ARGSUSED */ |
4c45483e | 1546 | int |
15637ed4 RG |
1547 | ftruncate(p, uap, retval) |
1548 | struct proc *p; | |
3c7eb27c | 1549 | register struct ftruncate_args *uap; |
15637ed4 RG |
1550 | int *retval; |
1551 | { | |
1552 | struct vattr vattr; | |
1553 | struct vnode *vp; | |
1554 | struct file *fp; | |
1555 | int error; | |
1556 | ||
1557 | if (error = getvnode(p->p_fd, uap->fd, &fp)) | |
1558 | return (error); | |
1559 | if ((fp->f_flag & FWRITE) == 0) | |
1560 | return (EINVAL); | |
1561 | vp = (struct vnode *)fp->f_data; | |
1562 | VOP_LOCK(vp); | |
1563 | if (vp->v_type == VDIR) { | |
1564 | error = EISDIR; | |
1565 | goto out; | |
1566 | } | |
1567 | if (error = vn_writechk(vp)) | |
1568 | goto out; | |
1569 | VATTR_NULL(&vattr); | |
1570 | vattr.va_size = uap->length; | |
1571 | error = VOP_SETATTR(vp, &vattr, fp->f_cred, p); | |
1572 | out: | |
1573 | VOP_UNLOCK(vp); | |
1574 | return (error); | |
1575 | } | |
1576 | ||
1577 | /* | |
1578 | * Synch an open file. | |
1579 | */ | |
3c7eb27c DG |
1580 | |
1581 | struct fsync_args { | |
1582 | int fd; | |
1583 | }; | |
1584 | ||
15637ed4 | 1585 | /* ARGSUSED */ |
4c45483e | 1586 | int |
15637ed4 RG |
1587 | fsync(p, uap, retval) |
1588 | struct proc *p; | |
3c7eb27c | 1589 | struct fsync_args *uap; |
15637ed4 RG |
1590 | int *retval; |
1591 | { | |
1592 | register struct vnode *vp; | |
1593 | struct file *fp; | |
1594 | int error; | |
1595 | ||
1596 | if (error = getvnode(p->p_fd, uap->fd, &fp)) | |
1597 | return (error); | |
1598 | vp = (struct vnode *)fp->f_data; | |
1599 | VOP_LOCK(vp); | |
1600 | error = VOP_FSYNC(vp, fp->f_flag, fp->f_cred, MNT_WAIT, p); | |
1601 | VOP_UNLOCK(vp); | |
1602 | return (error); | |
1603 | } | |
1604 | ||
1605 | /* | |
1606 | * Rename system call. | |
1607 | * | |
1608 | * Source and destination must either both be directories, or both | |
1609 | * not be directories. If target is a directory, it must be empty. | |
1610 | */ | |
3c7eb27c DG |
1611 | |
1612 | struct rename_args { | |
1613 | char *from; | |
1614 | char *to; | |
1615 | }; | |
1616 | ||
15637ed4 | 1617 | /* ARGSUSED */ |
4c45483e | 1618 | int |
15637ed4 RG |
1619 | rename(p, uap, retval) |
1620 | struct proc *p; | |
3c7eb27c | 1621 | register struct rename_args *uap; |
15637ed4 RG |
1622 | int *retval; |
1623 | { | |
1624 | register struct vnode *tvp, *fvp, *tdvp; | |
1625 | struct nameidata fromnd, tond; | |
1626 | int error; | |
1627 | ||
1628 | fromnd.ni_nameiop = DELETE | WANTPARENT | SAVESTART; | |
1629 | fromnd.ni_segflg = UIO_USERSPACE; | |
1630 | fromnd.ni_dirp = uap->from; | |
1631 | if (error = namei(&fromnd, p)) | |
1632 | return (error); | |
1633 | fvp = fromnd.ni_vp; | |
1634 | tond.ni_nameiop = RENAME | LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; | |
1635 | tond.ni_segflg = UIO_USERSPACE; | |
1636 | tond.ni_dirp = uap->to; | |
1637 | if (error = namei(&tond, p)) { | |
1638 | VOP_ABORTOP(&fromnd); | |
1639 | vrele(fromnd.ni_dvp); | |
1640 | vrele(fvp); | |
1641 | goto out1; | |
1642 | } | |
1643 | tdvp = tond.ni_dvp; | |
1644 | tvp = tond.ni_vp; | |
1645 | if (tvp != NULL) { | |
1646 | if (fvp->v_type == VDIR && tvp->v_type != VDIR) { | |
1647 | error = ENOTDIR; | |
1648 | goto out; | |
1649 | } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { | |
1650 | error = EISDIR; | |
1651 | goto out; | |
1652 | } | |
1653 | if (fvp->v_mount != tvp->v_mount) { | |
1654 | error = EXDEV; | |
1655 | goto out; | |
1656 | } | |
1657 | } | |
1658 | if (fvp->v_mount != tdvp->v_mount) { | |
1659 | error = EXDEV; | |
1660 | goto out; | |
1661 | } | |
1662 | if (fvp == tdvp) | |
1663 | error = EINVAL; | |
1664 | /* | |
1665 | * If source is the same as the destination (that is the | |
1666 | * same inode number with the same name in the same directory), | |
1667 | * then there is nothing to do. | |
1668 | */ | |
1669 | if (fvp == tvp && fromnd.ni_dvp == tdvp && | |
1670 | fromnd.ni_namelen == tond.ni_namelen && | |
1671 | !bcmp(fromnd.ni_ptr, tond.ni_ptr, fromnd.ni_namelen)) | |
1672 | error = -1; | |
1673 | out: | |
1674 | if (!error) { | |
1675 | error = VOP_RENAME(&fromnd, &tond, p); | |
1676 | } else { | |
1677 | VOP_ABORTOP(&tond); | |
1678 | if (tdvp == tvp) | |
1679 | vrele(tdvp); | |
1680 | else | |
1681 | vput(tdvp); | |
1682 | if (tvp) | |
1683 | vput(tvp); | |
1684 | VOP_ABORTOP(&fromnd); | |
1685 | vrele(fromnd.ni_dvp); | |
1686 | vrele(fvp); | |
1687 | } | |
1688 | vrele(tond.ni_startdir); | |
1689 | FREE(tond.ni_pnbuf, M_NAMEI); | |
1690 | out1: | |
b43a13ed DG |
1691 | if (fromnd.ni_startdir) |
1692 | vrele(fromnd.ni_startdir); | |
15637ed4 RG |
1693 | FREE(fromnd.ni_pnbuf, M_NAMEI); |
1694 | if (error == -1) | |
1695 | return (0); | |
1696 | return (error); | |
1697 | } | |
1698 | ||
1699 | /* | |
1700 | * Mkdir system call. | |
1701 | */ | |
3c7eb27c DG |
1702 | |
1703 | struct mkdir_args { | |
1704 | char *name; | |
1705 | int dmode; | |
1706 | }; | |
1707 | ||
15637ed4 | 1708 | /* ARGSUSED */ |
4c45483e | 1709 | int |
15637ed4 RG |
1710 | mkdir(p, uap, retval) |
1711 | struct proc *p; | |
3c7eb27c | 1712 | register struct mkdir_args *uap; |
15637ed4 RG |
1713 | int *retval; |
1714 | { | |
1715 | register struct nameidata *ndp; | |
1716 | register struct vnode *vp; | |
1717 | struct vattr vattr; | |
1718 | int error; | |
1719 | struct nameidata nd; | |
1720 | ||
1721 | ndp = &nd; | |
1722 | ndp->ni_nameiop = CREATE | LOCKPARENT; | |
1723 | ndp->ni_segflg = UIO_USERSPACE; | |
1724 | ndp->ni_dirp = uap->name; | |
1725 | if (error = namei(ndp, p)) | |
1726 | return (error); | |
1727 | vp = ndp->ni_vp; | |
1728 | if (vp != NULL) { | |
1729 | VOP_ABORTOP(ndp); | |
1730 | if (ndp->ni_dvp == vp) | |
1731 | vrele(ndp->ni_dvp); | |
1732 | else | |
1733 | vput(ndp->ni_dvp); | |
1734 | vrele(vp); | |
1735 | return (EEXIST); | |
1736 | } | |
1737 | VATTR_NULL(&vattr); | |
1738 | vattr.va_type = VDIR; | |
1739 | vattr.va_mode = (uap->dmode & 0777) &~ p->p_fd->fd_cmask; | |
1740 | error = VOP_MKDIR(ndp, &vattr, p); | |
1741 | if (!error) | |
1742 | vput(ndp->ni_vp); | |
1743 | return (error); | |
1744 | } | |
1745 | ||
1746 | /* | |
1747 | * Rmdir system call. | |
1748 | */ | |
3c7eb27c DG |
1749 | |
1750 | struct rmdir_args { | |
1751 | char *name; | |
1752 | }; | |
1753 | ||
15637ed4 | 1754 | /* ARGSUSED */ |
4c45483e | 1755 | int |
15637ed4 RG |
1756 | rmdir(p, uap, retval) |
1757 | struct proc *p; | |
3c7eb27c | 1758 | struct rmdir_args *uap; |
15637ed4 RG |
1759 | int *retval; |
1760 | { | |
1761 | register struct nameidata *ndp; | |
1762 | register struct vnode *vp; | |
1763 | int error; | |
1764 | struct nameidata nd; | |
1765 | ||
1766 | ndp = &nd; | |
1767 | ndp->ni_nameiop = DELETE | LOCKPARENT | LOCKLEAF; | |
1768 | ndp->ni_segflg = UIO_USERSPACE; | |
1769 | ndp->ni_dirp = uap->name; | |
1770 | if (error = namei(ndp, p)) | |
1771 | return (error); | |
1772 | vp = ndp->ni_vp; | |
1773 | if (vp->v_type != VDIR) { | |
1774 | error = ENOTDIR; | |
1775 | goto out; | |
1776 | } | |
1777 | /* | |
1778 | * No rmdir "." please. | |
1779 | */ | |
1780 | if (ndp->ni_dvp == vp) { | |
1781 | error = EINVAL; | |
1782 | goto out; | |
1783 | } | |
1784 | /* | |
1785 | * The root of a mounted filesystem cannot be deleted. | |
1786 | */ | |
1787 | if (vp->v_flag & VROOT) | |
1788 | error = EBUSY; | |
1789 | out: | |
1790 | if (!error) { | |
1791 | error = VOP_RMDIR(ndp, p); | |
1792 | } else { | |
1793 | VOP_ABORTOP(ndp); | |
1794 | if (ndp->ni_dvp == vp) | |
1795 | vrele(ndp->ni_dvp); | |
1796 | else | |
1797 | vput(ndp->ni_dvp); | |
1798 | vput(vp); | |
1799 | } | |
1800 | return (error); | |
1801 | } | |
1802 | ||
1803 | /* | |
1804 | * Read a block of directory entries in a file system independent format. | |
1805 | */ | |
3c7eb27c DG |
1806 | |
1807 | struct getdirentries_args { | |
1808 | int fd; | |
1809 | char *buf; | |
1810 | unsigned count; | |
1811 | long *basep; | |
1812 | }; | |
1813 | ||
4c45483e | 1814 | int |
15637ed4 RG |
1815 | getdirentries(p, uap, retval) |
1816 | struct proc *p; | |
3c7eb27c | 1817 | register struct getdirentries_args *uap; |
15637ed4 RG |
1818 | int *retval; |
1819 | { | |
1820 | register struct vnode *vp; | |
1821 | struct file *fp; | |
1822 | struct uio auio; | |
1823 | struct iovec aiov; | |
1824 | off_t off; | |
1825 | int error, eofflag; | |
1826 | ||
1827 | if (error = getvnode(p->p_fd, uap->fd, &fp)) | |
1828 | return (error); | |
1829 | if ((fp->f_flag & FREAD) == 0) | |
1830 | return (EBADF); | |
1831 | vp = (struct vnode *)fp->f_data; | |
1832 | if (vp->v_type != VDIR) | |
1833 | return (EINVAL); | |
1834 | aiov.iov_base = uap->buf; | |
1835 | aiov.iov_len = uap->count; | |
1836 | auio.uio_iov = &aiov; | |
1837 | auio.uio_iovcnt = 1; | |
1838 | auio.uio_rw = UIO_READ; | |
1839 | auio.uio_segflg = UIO_USERSPACE; | |
1840 | auio.uio_procp = p; | |
1841 | auio.uio_resid = uap->count; | |
1842 | VOP_LOCK(vp); | |
1843 | auio.uio_offset = off = fp->f_offset; | |
1844 | error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag); | |
1845 | fp->f_offset = auio.uio_offset; | |
1846 | VOP_UNLOCK(vp); | |
1847 | if (error) | |
1848 | return (error); | |
1849 | error = copyout((caddr_t)&off, (caddr_t)uap->basep, sizeof(long)); | |
1850 | *retval = uap->count - auio.uio_resid; | |
1851 | return (error); | |
1852 | } | |
1853 | ||
1854 | /* | |
1855 | * Set the mode mask for creation of filesystem nodes. | |
1856 | */ | |
3c7eb27c DG |
1857 | |
1858 | struct umask_args { | |
1859 | int mask; | |
1860 | }; | |
1861 | ||
15637ed4 RG |
1862 | mode_t |
1863 | umask(p, uap, retval) | |
1864 | struct proc *p; | |
3c7eb27c | 1865 | struct umask_args *uap; |
15637ed4 RG |
1866 | int *retval; |
1867 | { | |
1868 | register struct filedesc *fdp = p->p_fd; | |
1869 | ||
1870 | *retval = fdp->fd_cmask; | |
1871 | fdp->fd_cmask = uap->mask & 07777; | |
1872 | return (0); | |
1873 | } | |
1874 | ||
1875 | /* | |
1876 | * Void all references to file by ripping underlying filesystem | |
1877 | * away from vnode. | |
1878 | */ | |
3c7eb27c DG |
1879 | |
1880 | struct revoke_args { | |
1881 | char *fname; | |
1882 | }; | |
1883 | ||
15637ed4 | 1884 | /* ARGSUSED */ |
4c45483e | 1885 | int |
15637ed4 RG |
1886 | revoke(p, uap, retval) |
1887 | struct proc *p; | |
3c7eb27c | 1888 | register struct revoke_args *uap; |
15637ed4 RG |
1889 | int *retval; |
1890 | { | |
1891 | register struct nameidata *ndp; | |
1892 | register struct vnode *vp; | |
1893 | struct vattr vattr; | |
1894 | int error; | |
1895 | struct nameidata nd; | |
1896 | ||
1897 | ndp = &nd; | |
1898 | ndp->ni_nameiop = LOOKUP | FOLLOW; | |
1899 | ndp->ni_segflg = UIO_USERSPACE; | |
1900 | ndp->ni_dirp = uap->fname; | |
1901 | if (error = namei(ndp, p)) | |
1902 | return (error); | |
1903 | vp = ndp->ni_vp; | |
1904 | if (vp->v_type != VCHR && vp->v_type != VBLK) { | |
1905 | error = EINVAL; | |
1906 | goto out; | |
1907 | } | |
1908 | if (error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) | |
1909 | goto out; | |
1910 | if (p->p_ucred->cr_uid != vattr.va_uid && | |
1911 | (error = suser(p->p_ucred, &p->p_acflag))) | |
1912 | goto out; | |
1913 | if (vp->v_usecount > 1 || (vp->v_flag & VALIASED)) | |
1914 | vgoneall(vp); | |
1915 | out: | |
1916 | vrele(vp); | |
1917 | return (error); | |
1918 | } | |
1919 | ||
1920 | /* | |
1921 | * Convert a user file descriptor to a kernel file entry. | |
1922 | */ | |
fde1aeb2 | 1923 | static int |
15637ed4 RG |
1924 | getvnode(fdp, fdes, fpp) |
1925 | struct filedesc *fdp; | |
15637ed4 | 1926 | int fdes; |
fde1aeb2 | 1927 | struct file **fpp; |
15637ed4 RG |
1928 | { |
1929 | struct file *fp; | |
1930 | ||
1931 | if ((unsigned)fdes >= fdp->fd_nfiles || | |
1932 | (fp = fdp->fd_ofiles[fdes]) == NULL) | |
1933 | return (EBADF); | |
1934 | if (fp->f_type != DTYPE_VNODE) | |
1935 | return (EINVAL); | |
1936 | *fpp = fp; | |
1937 | return (0); | |
1938 | } |