| 1 | /* |
| 2 | * Copyright (c) 1989, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * (c) UNIX System Laboratories, Inc. |
| 5 | * All or some portions of this file are derived from material licensed |
| 6 | * to the University of California by American Telephone and Telegraph |
| 7 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with |
| 8 | * the permission of UNIX System Laboratories, Inc. |
| 9 | * |
| 10 | * %sccs.include.redist.c% |
| 11 | * |
| 12 | * @(#)vfs_syscalls.c 8.28 (Berkeley) %G% |
| 13 | */ |
| 14 | |
| 15 | #include <sys/param.h> |
| 16 | #include <sys/systm.h> |
| 17 | #include <sys/namei.h> |
| 18 | #include <sys/filedesc.h> |
| 19 | #include <sys/kernel.h> |
| 20 | #include <sys/file.h> |
| 21 | #include <sys/stat.h> |
| 22 | #include <sys/vnode.h> |
| 23 | #include <sys/mount.h> |
| 24 | #include <sys/proc.h> |
| 25 | #include <sys/uio.h> |
| 26 | #include <sys/malloc.h> |
| 27 | #include <sys/dirent.h> |
| 28 | |
| 29 | #include <vm/vm.h> |
| 30 | #include <sys/sysctl.h> |
| 31 | |
| 32 | static int change_dir __P((struct nameidata *ndp, struct proc *p)); |
| 33 | |
| 34 | #ifdef REF_DIAGNOSTIC |
| 35 | #define CURCOUNT (curproc ? curproc->p_spare[0] : 0) |
| 36 | #define CHECKPOINTREF int oldrefcount = CURCOUNT; |
| 37 | #define CHECKREFS(F) if (oldrefcount != CURCOUNT) \ |
| 38 | printf("REFCOUNT: %s, old=%d, new=%d\n", (F), oldrefcount, CURCOUNT); |
| 39 | #else |
| 40 | #define CHECKPOINTREF |
| 41 | #define CHECKREFS(D) |
| 42 | #endif |
| 43 | |
| 44 | /* |
| 45 | * Virtual File System System Calls |
| 46 | */ |
| 47 | |
| 48 | /* |
| 49 | * Mount a file system. |
| 50 | */ |
| 51 | struct mount_args { |
| 52 | int type; |
| 53 | char *path; |
| 54 | int flags; |
| 55 | caddr_t data; |
| 56 | }; |
| 57 | /* ARGSUSED */ |
| 58 | mount(p, uap, retval) |
| 59 | struct proc *p; |
| 60 | register struct mount_args *uap; |
| 61 | int *retval; |
| 62 | { |
| 63 | register struct vnode *vp; |
| 64 | register struct mount *mp; |
| 65 | int error, flag; |
| 66 | struct vattr va; |
| 67 | struct nameidata nd; |
| 68 | |
| 69 | /* |
| 70 | * Get vnode to be covered |
| 71 | */ |
| 72 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->path, p); |
| 73 | if (error = namei(&nd)) |
| 74 | return (error); |
| 75 | vp = nd.ni_vp; |
| 76 | if (uap->flags & MNT_UPDATE) { |
| 77 | if ((vp->v_flag & VROOT) == 0) { |
| 78 | vput(vp); |
| 79 | return (EINVAL); |
| 80 | } |
| 81 | mp = vp->v_mount; |
| 82 | flag = mp->mnt_flag; |
| 83 | /* |
| 84 | * We only allow the filesystem to be reloaded if it |
| 85 | * is currently mounted read-only. |
| 86 | */ |
| 87 | if ((uap->flags & MNT_RELOAD) && |
| 88 | ((mp->mnt_flag & MNT_RDONLY) == 0)) { |
| 89 | vput(vp); |
| 90 | return (EOPNOTSUPP); /* Needs translation */ |
| 91 | } |
| 92 | mp->mnt_flag |= |
| 93 | uap->flags & (MNT_RELOAD | MNT_FORCE | MNT_UPDATE); |
| 94 | /* |
| 95 | * Only root, or the user that did the original mount is |
| 96 | * permitted to update it. |
| 97 | */ |
| 98 | if (mp->mnt_stat.f_owner != p->p_ucred->cr_uid && |
| 99 | (error = suser(p->p_ucred, &p->p_acflag))) { |
| 100 | vput(vp); |
| 101 | return (error); |
| 102 | } |
| 103 | /* |
| 104 | * Do not allow NFS export by non-root users. Silently |
| 105 | * enforce MNT_NOSUID and MNT_NODEV for non-root users. |
| 106 | */ |
| 107 | if (p->p_ucred->cr_uid != 0) { |
| 108 | if (uap->flags & MNT_EXPORTED) { |
| 109 | vput(vp); |
| 110 | return (EPERM); |
| 111 | } |
| 112 | uap->flags |= MNT_NOSUID | MNT_NODEV; |
| 113 | } |
| 114 | VOP_UNLOCK(vp); |
| 115 | goto update; |
| 116 | } |
| 117 | /* |
| 118 | * If the user is not root, ensure that they own the directory |
| 119 | * onto which we are attempting to mount. |
| 120 | */ |
| 121 | if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)) || |
| 122 | (va.va_uid != p->p_ucred->cr_uid && |
| 123 | (error = suser(p->p_ucred, &p->p_acflag)))) { |
| 124 | vput(vp); |
| 125 | return (error); |
| 126 | } |
| 127 | /* |
| 128 | * Do not allow NFS export by non-root users. Silently |
| 129 | * enforce MNT_NOSUID and MNT_NODEV for non-root users. |
| 130 | */ |
| 131 | if (p->p_ucred->cr_uid != 0) { |
| 132 | if (uap->flags & MNT_EXPORTED) { |
| 133 | vput(vp); |
| 134 | return (EPERM); |
| 135 | } |
| 136 | uap->flags |= MNT_NOSUID | MNT_NODEV; |
| 137 | } |
| 138 | if (error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 0)) |
| 139 | return (error); |
| 140 | if (vp->v_type != VDIR) { |
| 141 | vput(vp); |
| 142 | return (ENOTDIR); |
| 143 | } |
| 144 | if ((u_long)uap->type > MOUNT_MAXTYPE || vfssw[uap->type] == NULL) { |
| 145 | vput(vp); |
| 146 | return (ENODEV); |
| 147 | } |
| 148 | if (vp->v_mountedhere != NULL) { |
| 149 | vput(vp); |
| 150 | return (EBUSY); |
| 151 | } |
| 152 | |
| 153 | /* |
| 154 | * Allocate and initialize the file system. |
| 155 | */ |
| 156 | mp = (struct mount *)malloc((u_long)sizeof(struct mount), |
| 157 | M_MOUNT, M_WAITOK); |
| 158 | bzero((char *)mp, (u_long)sizeof(struct mount)); |
| 159 | mp->mnt_op = vfssw[uap->type]; |
| 160 | if (error = vfs_lock(mp)) { |
| 161 | free((caddr_t)mp, M_MOUNT); |
| 162 | vput(vp); |
| 163 | return (error); |
| 164 | } |
| 165 | vp->v_mountedhere = mp; |
| 166 | mp->mnt_vnodecovered = vp; |
| 167 | mp->mnt_stat.f_owner = p->p_ucred->cr_uid; |
| 168 | update: |
| 169 | /* |
| 170 | * Set the mount level flags. |
| 171 | */ |
| 172 | if (uap->flags & MNT_RDONLY) |
| 173 | mp->mnt_flag |= MNT_RDONLY; |
| 174 | else if (mp->mnt_flag & MNT_RDONLY) |
| 175 | mp->mnt_flag |= MNT_WANTRDWR; |
| 176 | mp->mnt_flag &=~ (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV | |
| 177 | MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC); |
| 178 | mp->mnt_flag |= uap->flags & (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV | |
| 179 | MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC); |
| 180 | /* |
| 181 | * Mount the filesystem. |
| 182 | */ |
| 183 | error = VFS_MOUNT(mp, uap->path, uap->data, &nd, p); |
| 184 | if (mp->mnt_flag & MNT_UPDATE) { |
| 185 | vrele(vp); |
| 186 | if (mp->mnt_flag & MNT_WANTRDWR) |
| 187 | mp->mnt_flag &= ~MNT_RDONLY; |
| 188 | mp->mnt_flag &=~ |
| 189 | (MNT_UPDATE | MNT_RELOAD | MNT_FORCE | MNT_WANTRDWR); |
| 190 | if (error) |
| 191 | mp->mnt_flag = flag; |
| 192 | return (error); |
| 193 | } |
| 194 | /* |
| 195 | * Put the new filesystem on the mount list after root. |
| 196 | */ |
| 197 | cache_purge(vp); |
| 198 | if (!error) { |
| 199 | TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list); |
| 200 | checkdirs(vp); |
| 201 | VOP_UNLOCK(vp); |
| 202 | vfs_unlock(mp); |
| 203 | error = VFS_START(mp, 0, p); |
| 204 | } else { |
| 205 | mp->mnt_vnodecovered->v_mountedhere = (struct mount *)0; |
| 206 | vfs_unlock(mp); |
| 207 | free((caddr_t)mp, M_MOUNT); |
| 208 | vput(vp); |
| 209 | } |
| 210 | return (error); |
| 211 | } |
| 212 | |
| 213 | /* |
| 214 | * Scan all active processes to see if any of them have a current |
| 215 | * or root directory onto which the new filesystem has just been |
| 216 | * mounted. If so, replace them with the new mount point. |
| 217 | */ |
| 218 | checkdirs(olddp) |
| 219 | struct vnode *olddp; |
| 220 | { |
| 221 | struct filedesc *fdp; |
| 222 | struct vnode *newdp; |
| 223 | struct proc *p; |
| 224 | |
| 225 | if (olddp->v_usecount == 1) |
| 226 | return; |
| 227 | if (VFS_ROOT(olddp->v_mountedhere, &newdp)) |
| 228 | panic("mount: lost mount"); |
| 229 | for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) { |
| 230 | fdp = p->p_fd; |
| 231 | if (fdp->fd_cdir == olddp) { |
| 232 | vrele(fdp->fd_cdir); |
| 233 | VREF(newdp); |
| 234 | fdp->fd_cdir = newdp; |
| 235 | } |
| 236 | if (fdp->fd_rdir == olddp) { |
| 237 | vrele(fdp->fd_rdir); |
| 238 | VREF(newdp); |
| 239 | fdp->fd_rdir = newdp; |
| 240 | } |
| 241 | } |
| 242 | if (rootvnode == olddp) { |
| 243 | vrele(rootvnode); |
| 244 | VREF(newdp); |
| 245 | rootvnode = newdp; |
| 246 | } |
| 247 | vput(newdp); |
| 248 | } |
| 249 | |
| 250 | /* |
| 251 | * Unmount a file system. |
| 252 | * |
| 253 | * Note: unmount takes a path to the vnode mounted on as argument, |
| 254 | * not special file (as before). |
| 255 | */ |
| 256 | struct unmount_args { |
| 257 | char *path; |
| 258 | int flags; |
| 259 | }; |
| 260 | /* ARGSUSED */ |
| 261 | unmount(p, uap, retval) |
| 262 | struct proc *p; |
| 263 | register struct unmount_args *uap; |
| 264 | int *retval; |
| 265 | { |
| 266 | register struct vnode *vp; |
| 267 | struct mount *mp; |
| 268 | int error; |
| 269 | struct nameidata nd; |
| 270 | |
| 271 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->path, p); |
| 272 | if (error = namei(&nd)) |
| 273 | return (error); |
| 274 | vp = nd.ni_vp; |
| 275 | mp = vp->v_mount; |
| 276 | |
| 277 | /* |
| 278 | * Only root, or the user that did the original mount is |
| 279 | * permitted to unmount this filesystem. |
| 280 | */ |
| 281 | if ((mp->mnt_stat.f_owner != p->p_ucred->cr_uid) && |
| 282 | (error = suser(p->p_ucred, &p->p_acflag))) { |
| 283 | vput(vp); |
| 284 | return (error); |
| 285 | } |
| 286 | |
| 287 | /* |
| 288 | * Must be the root of the filesystem |
| 289 | */ |
| 290 | if ((vp->v_flag & VROOT) == 0) { |
| 291 | vput(vp); |
| 292 | return (EINVAL); |
| 293 | } |
| 294 | vput(vp); |
| 295 | return (dounmount(mp, uap->flags, p)); |
| 296 | } |
| 297 | |
| 298 | /* |
| 299 | * Do the actual file system unmount. |
| 300 | */ |
| 301 | dounmount(mp, flags, p) |
| 302 | register struct mount *mp; |
| 303 | int flags; |
| 304 | struct proc *p; |
| 305 | { |
| 306 | struct vnode *coveredvp; |
| 307 | int error; |
| 308 | |
| 309 | coveredvp = mp->mnt_vnodecovered; |
| 310 | if (vfs_busy(mp)) |
| 311 | return (EBUSY); |
| 312 | mp->mnt_flag |= MNT_UNMOUNT; |
| 313 | if (error = vfs_lock(mp)) |
| 314 | return (error); |
| 315 | |
| 316 | mp->mnt_flag &=~ MNT_ASYNC; |
| 317 | vnode_pager_umount(mp); /* release cached vnodes */ |
| 318 | cache_purgevfs(mp); /* remove cache entries for this file sys */ |
| 319 | if ((error = VFS_SYNC(mp, MNT_WAIT, p->p_ucred, p)) == 0 || |
| 320 | (flags & MNT_FORCE)) |
| 321 | error = VFS_UNMOUNT(mp, flags, p); |
| 322 | mp->mnt_flag &= ~MNT_UNMOUNT; |
| 323 | vfs_unbusy(mp); |
| 324 | if (error) { |
| 325 | vfs_unlock(mp); |
| 326 | } else { |
| 327 | vrele(coveredvp); |
| 328 | TAILQ_REMOVE(&mountlist, mp, mnt_list); |
| 329 | mp->mnt_vnodecovered->v_mountedhere = (struct mount *)0; |
| 330 | vfs_unlock(mp); |
| 331 | if (mp->mnt_vnodelist.lh_first != NULL) |
| 332 | panic("unmount: dangling vnode"); |
| 333 | free((caddr_t)mp, M_MOUNT); |
| 334 | } |
| 335 | return (error); |
| 336 | } |
| 337 | |
| 338 | /* |
| 339 | * Sync each mounted filesystem. |
| 340 | */ |
| 341 | #ifdef DEBUG |
| 342 | int syncprt = 0; |
| 343 | struct ctldebug debug0 = { "syncprt", &syncprt }; |
| 344 | #endif |
| 345 | |
| 346 | struct sync_args { |
| 347 | int dummy; |
| 348 | }; |
| 349 | /* ARGSUSED */ |
| 350 | sync(p, uap, retval) |
| 351 | struct proc *p; |
| 352 | struct sync_args *uap; |
| 353 | int *retval; |
| 354 | { |
| 355 | register struct mount *mp, *nmp; |
| 356 | int asyncflag; |
| 357 | |
| 358 | for (mp = mountlist.tqh_first; mp != NULL; mp = nmp) { |
| 359 | /* |
| 360 | * Get the next pointer in case we hang on vfs_busy |
| 361 | * while we are being unmounted. |
| 362 | */ |
| 363 | nmp = mp->mnt_list.tqe_next; |
| 364 | /* |
| 365 | * The lock check below is to avoid races with mount |
| 366 | * and unmount. |
| 367 | */ |
| 368 | if ((mp->mnt_flag & (MNT_MLOCK|MNT_RDONLY|MNT_MPBUSY)) == 0 && |
| 369 | !vfs_busy(mp)) { |
| 370 | asyncflag = mp->mnt_flag & MNT_ASYNC; |
| 371 | mp->mnt_flag &= ~MNT_ASYNC; |
| 372 | VFS_SYNC(mp, MNT_NOWAIT, p->p_ucred, p); |
| 373 | if (asyncflag) |
| 374 | mp->mnt_flag |= MNT_ASYNC; |
| 375 | /* |
| 376 | * Get the next pointer again, as the next filesystem |
| 377 | * might have been unmounted while we were sync'ing. |
| 378 | */ |
| 379 | nmp = mp->mnt_list.tqe_next; |
| 380 | vfs_unbusy(mp); |
| 381 | } |
| 382 | } |
| 383 | #ifdef DIAGNOSTIC |
| 384 | if (syncprt) |
| 385 | vfs_bufstats(); |
| 386 | #endif /* DIAGNOSTIC */ |
| 387 | return (0); |
| 388 | } |
| 389 | |
| 390 | /* |
| 391 | * Change filesystem quotas. |
| 392 | */ |
| 393 | struct quotactl_args { |
| 394 | char *path; |
| 395 | int cmd; |
| 396 | int uid; |
| 397 | caddr_t arg; |
| 398 | }; |
| 399 | /* ARGSUSED */ |
| 400 | quotactl(p, uap, retval) |
| 401 | struct proc *p; |
| 402 | register struct quotactl_args *uap; |
| 403 | int *retval; |
| 404 | { |
| 405 | register struct mount *mp; |
| 406 | int error; |
| 407 | struct nameidata nd; |
| 408 | |
| 409 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p); |
| 410 | if (error = namei(&nd)) |
| 411 | return (error); |
| 412 | mp = nd.ni_vp->v_mount; |
| 413 | vrele(nd.ni_vp); |
| 414 | return (VFS_QUOTACTL(mp, uap->cmd, uap->uid, uap->arg, p)); |
| 415 | } |
| 416 | |
| 417 | /* |
| 418 | * Get filesystem statistics. |
| 419 | */ |
| 420 | struct statfs_args { |
| 421 | char *path; |
| 422 | struct statfs *buf; |
| 423 | }; |
| 424 | /* ARGSUSED */ |
| 425 | statfs(p, uap, retval) |
| 426 | struct proc *p; |
| 427 | register struct statfs_args *uap; |
| 428 | int *retval; |
| 429 | { |
| 430 | register struct mount *mp; |
| 431 | register struct statfs *sp; |
| 432 | int error; |
| 433 | struct nameidata nd; |
| 434 | |
| 435 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p); |
| 436 | if (error = namei(&nd)) |
| 437 | return (error); |
| 438 | mp = nd.ni_vp->v_mount; |
| 439 | sp = &mp->mnt_stat; |
| 440 | vrele(nd.ni_vp); |
| 441 | if (error = VFS_STATFS(mp, sp, p)) |
| 442 | return (error); |
| 443 | sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; |
| 444 | return (copyout((caddr_t)sp, (caddr_t)uap->buf, sizeof(*sp))); |
| 445 | } |
| 446 | |
| 447 | /* |
| 448 | * Get filesystem statistics. |
| 449 | */ |
| 450 | struct fstatfs_args { |
| 451 | int fd; |
| 452 | struct statfs *buf; |
| 453 | }; |
| 454 | /* ARGSUSED */ |
| 455 | fstatfs(p, uap, retval) |
| 456 | struct proc *p; |
| 457 | register struct fstatfs_args *uap; |
| 458 | int *retval; |
| 459 | { |
| 460 | struct file *fp; |
| 461 | struct mount *mp; |
| 462 | register struct statfs *sp; |
| 463 | int error; |
| 464 | |
| 465 | if (error = getvnode(p->p_fd, uap->fd, &fp)) |
| 466 | return (error); |
| 467 | mp = ((struct vnode *)fp->f_data)->v_mount; |
| 468 | sp = &mp->mnt_stat; |
| 469 | if (error = VFS_STATFS(mp, sp, p)) |
| 470 | return (error); |
| 471 | sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; |
| 472 | return (copyout((caddr_t)sp, (caddr_t)uap->buf, sizeof(*sp))); |
| 473 | } |
| 474 | |
| 475 | /* |
| 476 | * Get statistics on all filesystems. |
| 477 | */ |
| 478 | struct getfsstat_args { |
| 479 | struct statfs *buf; |
| 480 | long bufsize; |
| 481 | int flags; |
| 482 | }; |
| 483 | getfsstat(p, uap, retval) |
| 484 | struct proc *p; |
| 485 | register struct getfsstat_args *uap; |
| 486 | int *retval; |
| 487 | { |
| 488 | register struct mount *mp, *nmp; |
| 489 | register struct statfs *sp; |
| 490 | caddr_t sfsp; |
| 491 | long count, maxcount, error; |
| 492 | |
| 493 | maxcount = uap->bufsize / sizeof(struct statfs); |
| 494 | sfsp = (caddr_t)uap->buf; |
| 495 | for (count = 0, mp = mountlist.tqh_first; mp != NULL; mp = nmp) { |
| 496 | nmp = mp->mnt_list.tqe_next; |
| 497 | if (sfsp && count < maxcount && |
| 498 | ((mp->mnt_flag & MNT_MLOCK) == 0)) { |
| 499 | sp = &mp->mnt_stat; |
| 500 | /* |
| 501 | * If MNT_NOWAIT is specified, do not refresh the |
| 502 | * fsstat cache. MNT_WAIT overrides MNT_NOWAIT. |
| 503 | */ |
| 504 | if (((uap->flags & MNT_NOWAIT) == 0 || |
| 505 | (uap->flags & MNT_WAIT)) && |
| 506 | (error = VFS_STATFS(mp, sp, p))) |
| 507 | continue; |
| 508 | sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; |
| 509 | if (error = copyout((caddr_t)sp, sfsp, sizeof(*sp))) |
| 510 | return (error); |
| 511 | sfsp += sizeof(*sp); |
| 512 | } |
| 513 | count++; |
| 514 | } |
| 515 | if (sfsp && count > maxcount) |
| 516 | *retval = maxcount; |
| 517 | else |
| 518 | *retval = count; |
| 519 | return (0); |
| 520 | } |
| 521 | |
| 522 | /* |
| 523 | * Change current working directory to a given file descriptor. |
| 524 | */ |
| 525 | struct fchdir_args { |
| 526 | int fd; |
| 527 | }; |
| 528 | /* ARGSUSED */ |
| 529 | fchdir(p, uap, retval) |
| 530 | struct proc *p; |
| 531 | struct fchdir_args *uap; |
| 532 | int *retval; |
| 533 | { |
| 534 | register struct filedesc *fdp = p->p_fd; |
| 535 | struct vnode *vp, *tdp; |
| 536 | struct mount *mp; |
| 537 | struct file *fp; |
| 538 | int error; |
| 539 | |
| 540 | if (error = getvnode(fdp, uap->fd, &fp)) |
| 541 | return (error); |
| 542 | vp = (struct vnode *)fp->f_data; |
| 543 | VREF(vp); |
| 544 | VOP_LOCK(vp); |
| 545 | if (vp->v_type != VDIR) |
| 546 | error = ENOTDIR; |
| 547 | else |
| 548 | error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p); |
| 549 | while (!error && (mp = vp->v_mountedhere) != NULL) { |
| 550 | if (mp->mnt_flag & MNT_MLOCK) { |
| 551 | mp->mnt_flag |= MNT_MWAIT; |
| 552 | sleep((caddr_t)mp, PVFS); |
| 553 | continue; |
| 554 | } |
| 555 | if (error = VFS_ROOT(mp, &tdp)) |
| 556 | break; |
| 557 | vput(vp); |
| 558 | vp = tdp; |
| 559 | } |
| 560 | VOP_UNLOCK(vp); |
| 561 | if (error) { |
| 562 | vrele(vp); |
| 563 | return (error); |
| 564 | } |
| 565 | vrele(fdp->fd_cdir); |
| 566 | fdp->fd_cdir = vp; |
| 567 | return (0); |
| 568 | } |
| 569 | |
| 570 | /* |
| 571 | * Change current working directory (``.''). |
| 572 | */ |
| 573 | struct chdir_args { |
| 574 | char *path; |
| 575 | }; |
| 576 | /* ARGSUSED */ |
| 577 | chdir(p, uap, retval) |
| 578 | struct proc *p; |
| 579 | struct chdir_args *uap; |
| 580 | int *retval; |
| 581 | { |
| 582 | register struct filedesc *fdp = p->p_fd; |
| 583 | int error; |
| 584 | struct nameidata nd; |
| 585 | |
| 586 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->path, p); |
| 587 | if (error = change_dir(&nd, p)) |
| 588 | return (error); |
| 589 | vrele(fdp->fd_cdir); |
| 590 | fdp->fd_cdir = nd.ni_vp; |
| 591 | return (0); |
| 592 | } |
| 593 | |
| 594 | /* |
| 595 | * Change notion of root (``/'') directory. |
| 596 | */ |
| 597 | struct chroot_args { |
| 598 | char *path; |
| 599 | }; |
| 600 | /* ARGSUSED */ |
| 601 | chroot(p, uap, retval) |
| 602 | struct proc *p; |
| 603 | struct chroot_args *uap; |
| 604 | int *retval; |
| 605 | { |
| 606 | register struct filedesc *fdp = p->p_fd; |
| 607 | int error; |
| 608 | struct nameidata nd; |
| 609 | |
| 610 | if (error = suser(p->p_ucred, &p->p_acflag)) |
| 611 | return (error); |
| 612 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->path, p); |
| 613 | if (error = change_dir(&nd, p)) |
| 614 | return (error); |
| 615 | if (fdp->fd_rdir != NULL) |
| 616 | vrele(fdp->fd_rdir); |
| 617 | fdp->fd_rdir = nd.ni_vp; |
| 618 | return (0); |
| 619 | } |
| 620 | |
| 621 | /* |
| 622 | * Common routine for chroot and chdir. |
| 623 | */ |
| 624 | static int |
| 625 | change_dir(ndp, p) |
| 626 | register struct nameidata *ndp; |
| 627 | struct proc *p; |
| 628 | { |
| 629 | struct vnode *vp; |
| 630 | int error; |
| 631 | |
| 632 | if (error = namei(ndp)) |
| 633 | return (error); |
| 634 | vp = ndp->ni_vp; |
| 635 | if (vp->v_type != VDIR) |
| 636 | error = ENOTDIR; |
| 637 | else |
| 638 | error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p); |
| 639 | VOP_UNLOCK(vp); |
| 640 | if (error) |
| 641 | vrele(vp); |
| 642 | return (error); |
| 643 | } |
| 644 | |
| 645 | /* |
| 646 | * Check permissions, allocate an open file structure, |
| 647 | * and call the device open routine if any. |
| 648 | */ |
| 649 | struct open_args { |
| 650 | char *path; |
| 651 | int flags; |
| 652 | int mode; |
| 653 | }; |
| 654 | open(p, uap, retval) |
| 655 | struct proc *p; |
| 656 | register struct open_args *uap; |
| 657 | int *retval; |
| 658 | { |
| 659 | register struct filedesc *fdp = p->p_fd; |
| 660 | register struct file *fp; |
| 661 | register struct vnode *vp; |
| 662 | int flags, cmode; |
| 663 | struct file *nfp; |
| 664 | int type, indx, error; |
| 665 | struct flock lf; |
| 666 | struct nameidata nd; |
| 667 | extern struct fileops vnops; |
| 668 | |
| 669 | if (error = falloc(p, &nfp, &indx)) |
| 670 | return (error); |
| 671 | fp = nfp; |
| 672 | flags = FFLAGS(uap->flags); |
| 673 | cmode = ((uap->mode &~ fdp->fd_cmask) & ALLPERMS) &~ S_ISTXT; |
| 674 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p); |
| 675 | p->p_dupfd = -indx - 1; /* XXX check for fdopen */ |
| 676 | if (error = vn_open(&nd, flags, cmode)) { |
| 677 | ffree(fp); |
| 678 | if ((error == ENODEV || error == ENXIO) && |
| 679 | p->p_dupfd >= 0 && /* XXX from fdopen */ |
| 680 | (error = |
| 681 | dupfdopen(fdp, indx, p->p_dupfd, flags, error)) == 0) { |
| 682 | *retval = indx; |
| 683 | return (0); |
| 684 | } |
| 685 | if (error == ERESTART) |
| 686 | error = EINTR; |
| 687 | fdp->fd_ofiles[indx] = NULL; |
| 688 | return (error); |
| 689 | } |
| 690 | p->p_dupfd = 0; |
| 691 | vp = nd.ni_vp; |
| 692 | fp->f_flag = flags & FMASK; |
| 693 | fp->f_type = DTYPE_VNODE; |
| 694 | fp->f_ops = &vnops; |
| 695 | fp->f_data = (caddr_t)vp; |
| 696 | if (flags & (O_EXLOCK | O_SHLOCK)) { |
| 697 | lf.l_whence = SEEK_SET; |
| 698 | lf.l_start = 0; |
| 699 | lf.l_len = 0; |
| 700 | if (flags & O_EXLOCK) |
| 701 | lf.l_type = F_WRLCK; |
| 702 | else |
| 703 | lf.l_type = F_RDLCK; |
| 704 | type = F_FLOCK; |
| 705 | if ((flags & FNONBLOCK) == 0) |
| 706 | type |= F_WAIT; |
| 707 | VOP_UNLOCK(vp); |
| 708 | if (error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type)) { |
| 709 | (void) vn_close(vp, fp->f_flag, fp->f_cred, p); |
| 710 | ffree(fp); |
| 711 | fdp->fd_ofiles[indx] = NULL; |
| 712 | return (error); |
| 713 | } |
| 714 | VOP_LOCK(vp); |
| 715 | fp->f_flag |= FHASLOCK; |
| 716 | } |
| 717 | VOP_UNLOCK(vp); |
| 718 | *retval = indx; |
| 719 | return (0); |
| 720 | } |
| 721 | |
| 722 | #ifdef COMPAT_43 |
| 723 | /* |
| 724 | * Create a file. |
| 725 | */ |
| 726 | struct ocreat_args { |
| 727 | char *path; |
| 728 | int mode; |
| 729 | }; |
| 730 | ocreat(p, uap, retval) |
| 731 | struct proc *p; |
| 732 | register struct ocreat_args *uap; |
| 733 | int *retval; |
| 734 | { |
| 735 | struct open_args openuap; |
| 736 | |
| 737 | openuap.path = uap->path; |
| 738 | openuap.mode = uap->mode; |
| 739 | openuap.flags = O_WRONLY | O_CREAT | O_TRUNC; |
| 740 | return (open(p, &openuap, retval)); |
| 741 | } |
| 742 | #endif /* COMPAT_43 */ |
| 743 | |
| 744 | /* |
| 745 | * Create a special file. |
| 746 | */ |
| 747 | struct mknod_args { |
| 748 | char *path; |
| 749 | int mode; |
| 750 | int dev; |
| 751 | }; |
| 752 | /* ARGSUSED */ |
| 753 | mknod(p, uap, retval) |
| 754 | struct proc *p; |
| 755 | register struct mknod_args *uap; |
| 756 | int *retval; |
| 757 | { |
| 758 | register struct vnode *vp; |
| 759 | struct vattr vattr; |
| 760 | int error; |
| 761 | int whiteout; |
| 762 | struct nameidata nd; |
| 763 | |
| 764 | CHECKPOINTREF; |
| 765 | if (error = suser(p->p_ucred, &p->p_acflag)) |
| 766 | return (error); |
| 767 | NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, uap->path, p); |
| 768 | if (error = namei(&nd)) |
| 769 | return (error); |
| 770 | vp = nd.ni_vp; |
| 771 | if (vp != NULL) |
| 772 | error = EEXIST; |
| 773 | else { |
| 774 | VATTR_NULL(&vattr); |
| 775 | vattr.va_mode = (uap->mode & ALLPERMS) &~ p->p_fd->fd_cmask; |
| 776 | vattr.va_rdev = uap->dev; |
| 777 | whiteout = 0; |
| 778 | |
| 779 | switch (uap->mode & S_IFMT) { |
| 780 | case S_IFMT: /* used by badsect to flag bad sectors */ |
| 781 | vattr.va_type = VBAD; |
| 782 | break; |
| 783 | case S_IFCHR: |
| 784 | vattr.va_type = VCHR; |
| 785 | break; |
| 786 | case S_IFBLK: |
| 787 | vattr.va_type = VBLK; |
| 788 | break; |
| 789 | case S_IFWHT: |
| 790 | whiteout = 1; |
| 791 | break; |
| 792 | default: |
| 793 | error = EINVAL; |
| 794 | break; |
| 795 | } |
| 796 | } |
| 797 | if (!error) { |
| 798 | VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); |
| 799 | if (whiteout) { |
| 800 | error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, CREATE); |
| 801 | if (error) |
| 802 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 803 | vput(nd.ni_dvp); |
| 804 | } else { |
| 805 | error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, |
| 806 | &nd.ni_cnd, &vattr); |
| 807 | } |
| 808 | } else { |
| 809 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 810 | if (nd.ni_dvp == vp) |
| 811 | vrele(nd.ni_dvp); |
| 812 | else |
| 813 | vput(nd.ni_dvp); |
| 814 | if (vp) |
| 815 | vrele(vp); |
| 816 | } |
| 817 | CHECKREFS("mknod"); |
| 818 | return (error); |
| 819 | } |
| 820 | |
| 821 | /* |
| 822 | * Create named pipe. |
| 823 | */ |
| 824 | struct mkfifo_args { |
| 825 | char *path; |
| 826 | int mode; |
| 827 | }; |
| 828 | /* ARGSUSED */ |
| 829 | mkfifo(p, uap, retval) |
| 830 | struct proc *p; |
| 831 | register struct mkfifo_args *uap; |
| 832 | int *retval; |
| 833 | { |
| 834 | struct vattr vattr; |
| 835 | int error; |
| 836 | struct nameidata nd; |
| 837 | |
| 838 | #ifndef FIFO |
| 839 | return (EOPNOTSUPP); |
| 840 | #else |
| 841 | NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, uap->path, p); |
| 842 | if (error = namei(&nd)) |
| 843 | return (error); |
| 844 | if (nd.ni_vp != NULL) { |
| 845 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 846 | if (nd.ni_dvp == nd.ni_vp) |
| 847 | vrele(nd.ni_dvp); |
| 848 | else |
| 849 | vput(nd.ni_dvp); |
| 850 | vrele(nd.ni_vp); |
| 851 | return (EEXIST); |
| 852 | } |
| 853 | VATTR_NULL(&vattr); |
| 854 | vattr.va_type = VFIFO; |
| 855 | vattr.va_mode = (uap->mode & ALLPERMS) &~ p->p_fd->fd_cmask; |
| 856 | VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); |
| 857 | return (VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr)); |
| 858 | #endif /* FIFO */ |
| 859 | } |
| 860 | |
| 861 | /* |
| 862 | * Make a hard file link. |
| 863 | */ |
| 864 | struct link_args { |
| 865 | char *path; |
| 866 | char *link; |
| 867 | }; |
| 868 | /* ARGSUSED */ |
| 869 | link(p, uap, retval) |
| 870 | struct proc *p; |
| 871 | register struct link_args *uap; |
| 872 | int *retval; |
| 873 | { |
| 874 | register struct vnode *vp; |
| 875 | struct nameidata nd; |
| 876 | int error; |
| 877 | |
| 878 | CHECKPOINTREF; |
| 879 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p); |
| 880 | if (error = namei(&nd)) |
| 881 | return (error); |
| 882 | vp = nd.ni_vp; |
| 883 | if (vp->v_type != VDIR || |
| 884 | (error = suser(p->p_ucred, &p->p_acflag)) == 0) { |
| 885 | nd.ni_cnd.cn_nameiop = CREATE; |
| 886 | nd.ni_cnd.cn_flags = LOCKPARENT; |
| 887 | nd.ni_dirp = uap->link; |
| 888 | if ((error = namei(&nd)) == 0) { |
| 889 | if (nd.ni_vp != NULL) |
| 890 | error = EEXIST; |
| 891 | if (!error) { |
| 892 | VOP_LEASE(nd.ni_dvp, p, p->p_ucred, |
| 893 | LEASE_WRITE); |
| 894 | VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); |
| 895 | error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); |
| 896 | } else { |
| 897 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 898 | if (nd.ni_dvp == nd.ni_vp) |
| 899 | vrele(nd.ni_dvp); |
| 900 | else |
| 901 | vput(nd.ni_dvp); |
| 902 | if (nd.ni_vp) |
| 903 | vrele(nd.ni_vp); |
| 904 | } |
| 905 | } |
| 906 | } |
| 907 | vrele(vp); |
| 908 | CHECKREFS("link"); |
| 909 | return (error); |
| 910 | } |
| 911 | |
| 912 | /* |
| 913 | * Make a symbolic link. |
| 914 | */ |
| 915 | struct symlink_args { |
| 916 | char *path; |
| 917 | char *link; |
| 918 | }; |
| 919 | /* ARGSUSED */ |
| 920 | symlink(p, uap, retval) |
| 921 | struct proc *p; |
| 922 | register struct symlink_args *uap; |
| 923 | int *retval; |
| 924 | { |
| 925 | struct vattr vattr; |
| 926 | char *path; |
| 927 | int error; |
| 928 | struct nameidata nd; |
| 929 | |
| 930 | CHECKPOINTREF; |
| 931 | MALLOC(path, char *, MAXPATHLEN, M_NAMEI, M_WAITOK); |
| 932 | if (error = copyinstr(uap->path, path, MAXPATHLEN, NULL)) |
| 933 | goto out; |
| 934 | NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, uap->link, p); |
| 935 | if (error = namei(&nd)) |
| 936 | goto out; |
| 937 | if (nd.ni_vp) { |
| 938 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 939 | if (nd.ni_dvp == nd.ni_vp) |
| 940 | vrele(nd.ni_dvp); |
| 941 | else |
| 942 | vput(nd.ni_dvp); |
| 943 | vrele(nd.ni_vp); |
| 944 | error = EEXIST; |
| 945 | goto out; |
| 946 | } |
| 947 | VATTR_NULL(&vattr); |
| 948 | vattr.va_mode = ACCESSPERMS &~ p->p_fd->fd_cmask; |
| 949 | VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); |
| 950 | error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, path); |
| 951 | out: |
| 952 | FREE(path, M_NAMEI); |
| 953 | CHECKREFS("symlink"); |
| 954 | return (error); |
| 955 | } |
| 956 | |
| 957 | /* |
| 958 | * Delete a whiteout from the filesystem. |
| 959 | */ |
| 960 | struct undelete_args { |
| 961 | char *path; |
| 962 | }; |
| 963 | /* ARGSUSED */ |
| 964 | undelete(p, uap, retval) |
| 965 | struct proc *p; |
| 966 | struct undelete_args *uap; |
| 967 | int *retval; |
| 968 | { |
| 969 | int error; |
| 970 | struct nameidata nd; |
| 971 | |
| 972 | NDINIT(&nd, DELETE, LOCKPARENT|DOWHITEOUT, UIO_USERSPACE, uap->path, p); |
| 973 | error = namei(&nd); |
| 974 | if (error) |
| 975 | return (error); |
| 976 | |
| 977 | if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & ISWHITEOUT)) { |
| 978 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 979 | if (nd.ni_dvp == nd.ni_vp) |
| 980 | vrele(nd.ni_dvp); |
| 981 | else |
| 982 | vput(nd.ni_dvp); |
| 983 | if (nd.ni_vp) |
| 984 | vrele(nd.ni_vp); |
| 985 | return (EEXIST); |
| 986 | } |
| 987 | |
| 988 | VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); |
| 989 | if (error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, DELETE)) |
| 990 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 991 | vput(nd.ni_dvp); |
| 992 | return (error); |
| 993 | } |
| 994 | |
| 995 | /* |
| 996 | * Delete a name from the filesystem. |
| 997 | */ |
| 998 | struct unlink_args { |
| 999 | char *path; |
| 1000 | }; |
| 1001 | /* ARGSUSED */ |
| 1002 | unlink(p, uap, retval) |
| 1003 | struct proc *p; |
| 1004 | struct unlink_args *uap; |
| 1005 | int *retval; |
| 1006 | { |
| 1007 | register struct vnode *vp; |
| 1008 | int error; |
| 1009 | struct nameidata nd; |
| 1010 | |
| 1011 | CHECKPOINTREF; |
| 1012 | NDINIT(&nd, DELETE, LOCKPARENT, UIO_USERSPACE, uap->path, p); |
| 1013 | if (error = namei(&nd)) |
| 1014 | return (error); |
| 1015 | vp = nd.ni_vp; |
| 1016 | VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); |
| 1017 | VOP_LOCK(vp); |
| 1018 | |
| 1019 | if (vp->v_type != VDIR || |
| 1020 | (error = suser(p->p_ucred, &p->p_acflag)) == 0) { |
| 1021 | /* |
| 1022 | * The root of a mounted filesystem cannot be deleted. |
| 1023 | */ |
| 1024 | if (vp->v_flag & VROOT) |
| 1025 | error = EBUSY; |
| 1026 | else |
| 1027 | (void)vnode_pager_uncache(vp); |
| 1028 | } |
| 1029 | |
| 1030 | if (!error) { |
| 1031 | VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); |
| 1032 | error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); |
| 1033 | } else { |
| 1034 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 1035 | if (nd.ni_dvp == vp) |
| 1036 | vrele(nd.ni_dvp); |
| 1037 | else |
| 1038 | vput(nd.ni_dvp); |
| 1039 | if (vp != NULLVP) |
| 1040 | vput(vp); |
| 1041 | } |
| 1042 | CHECKREFS("unlink"); |
| 1043 | return (error); |
| 1044 | } |
| 1045 | |
| 1046 | /* |
| 1047 | * Reposition read/write file offset. |
| 1048 | */ |
| 1049 | struct lseek_args { |
| 1050 | int fd; |
| 1051 | int pad; |
| 1052 | off_t offset; |
| 1053 | int whence; |
| 1054 | }; |
| 1055 | lseek(p, uap, retval) |
| 1056 | struct proc *p; |
| 1057 | register struct lseek_args *uap; |
| 1058 | int *retval; |
| 1059 | { |
| 1060 | struct ucred *cred = p->p_ucred; |
| 1061 | register struct filedesc *fdp = p->p_fd; |
| 1062 | register struct file *fp; |
| 1063 | struct vattr vattr; |
| 1064 | int error; |
| 1065 | |
| 1066 | if ((u_int)uap->fd >= fdp->fd_nfiles || |
| 1067 | (fp = fdp->fd_ofiles[uap->fd]) == NULL) |
| 1068 | return (EBADF); |
| 1069 | if (fp->f_type != DTYPE_VNODE) |
| 1070 | return (ESPIPE); |
| 1071 | switch (uap->whence) { |
| 1072 | case L_INCR: |
| 1073 | fp->f_offset += uap->offset; |
| 1074 | break; |
| 1075 | case L_XTND: |
| 1076 | if (error = |
| 1077 | VOP_GETATTR((struct vnode *)fp->f_data, &vattr, cred, p)) |
| 1078 | return (error); |
| 1079 | fp->f_offset = uap->offset + vattr.va_size; |
| 1080 | break; |
| 1081 | case L_SET: |
| 1082 | fp->f_offset = uap->offset; |
| 1083 | break; |
| 1084 | default: |
| 1085 | return (EINVAL); |
| 1086 | } |
| 1087 | *(off_t *)retval = fp->f_offset; |
| 1088 | return (0); |
| 1089 | } |
| 1090 | |
| 1091 | #if defined(COMPAT_43) || defined(COMPAT_SUNOS) |
| 1092 | /* |
| 1093 | * Reposition read/write file offset. |
| 1094 | */ |
| 1095 | struct olseek_args { |
| 1096 | int fd; |
| 1097 | long offset; |
| 1098 | int whence; |
| 1099 | }; |
| 1100 | olseek(p, uap, retval) |
| 1101 | struct proc *p; |
| 1102 | register struct olseek_args *uap; |
| 1103 | int *retval; |
| 1104 | { |
| 1105 | struct lseek_args nuap; |
| 1106 | off_t qret; |
| 1107 | int error; |
| 1108 | |
| 1109 | nuap.fd = uap->fd; |
| 1110 | nuap.offset = uap->offset; |
| 1111 | nuap.whence = uap->whence; |
| 1112 | error = lseek(p, &nuap, &qret); |
| 1113 | *(long *)retval = qret; |
| 1114 | return (error); |
| 1115 | } |
| 1116 | #endif /* COMPAT_43 */ |
| 1117 | |
| 1118 | /* |
| 1119 | * Check access permissions. |
| 1120 | */ |
| 1121 | struct access_args { |
| 1122 | char *path; |
| 1123 | int flags; |
| 1124 | }; |
| 1125 | access(p, uap, retval) |
| 1126 | struct proc *p; |
| 1127 | register struct access_args *uap; |
| 1128 | int *retval; |
| 1129 | { |
| 1130 | register struct ucred *cred = p->p_ucred; |
| 1131 | register struct vnode *vp; |
| 1132 | int error, flags, t_gid, t_uid; |
| 1133 | struct nameidata nd; |
| 1134 | |
| 1135 | t_uid = cred->cr_uid; |
| 1136 | t_gid = cred->cr_groups[0]; |
| 1137 | cred->cr_uid = p->p_cred->p_ruid; |
| 1138 | cred->cr_groups[0] = p->p_cred->p_rgid; |
| 1139 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->path, p); |
| 1140 | if (error = namei(&nd)) |
| 1141 | goto out1; |
| 1142 | vp = nd.ni_vp; |
| 1143 | |
| 1144 | /* Flags == 0 means only check for existence. */ |
| 1145 | if (uap->flags) { |
| 1146 | flags = 0; |
| 1147 | if (uap->flags & R_OK) |
| 1148 | flags |= VREAD; |
| 1149 | if (uap->flags & W_OK) |
| 1150 | flags |= VWRITE; |
| 1151 | if (uap->flags & X_OK) |
| 1152 | flags |= VEXEC; |
| 1153 | if ((flags & VWRITE) == 0 || (error = vn_writechk(vp)) == 0) |
| 1154 | error = VOP_ACCESS(vp, flags, cred, p); |
| 1155 | } |
| 1156 | vput(vp); |
| 1157 | out1: |
| 1158 | cred->cr_uid = t_uid; |
| 1159 | cred->cr_groups[0] = t_gid; |
| 1160 | return (error); |
| 1161 | } |
| 1162 | |
| 1163 | #if defined(COMPAT_43) || defined(COMPAT_SUNOS) |
| 1164 | /* |
| 1165 | * Get file status; this version follows links. |
| 1166 | */ |
| 1167 | struct ostat_args { |
| 1168 | char *path; |
| 1169 | struct ostat *ub; |
| 1170 | }; |
| 1171 | /* ARGSUSED */ |
| 1172 | ostat(p, uap, retval) |
| 1173 | struct proc *p; |
| 1174 | register struct ostat_args *uap; |
| 1175 | int *retval; |
| 1176 | { |
| 1177 | struct stat sb; |
| 1178 | struct ostat osb; |
| 1179 | int error; |
| 1180 | struct nameidata nd; |
| 1181 | |
| 1182 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->path, p); |
| 1183 | if (error = namei(&nd)) |
| 1184 | return (error); |
| 1185 | error = vn_stat(nd.ni_vp, &sb, p); |
| 1186 | vput(nd.ni_vp); |
| 1187 | if (error) |
| 1188 | return (error); |
| 1189 | cvtstat(&sb, &osb); |
| 1190 | error = copyout((caddr_t)&osb, (caddr_t)uap->ub, sizeof (osb)); |
| 1191 | return (error); |
| 1192 | } |
| 1193 | |
| 1194 | /* |
| 1195 | * Get file status; this version does not follow links. |
| 1196 | */ |
| 1197 | struct olstat_args { |
| 1198 | char *path; |
| 1199 | struct ostat *ub; |
| 1200 | }; |
| 1201 | /* ARGSUSED */ |
| 1202 | olstat(p, uap, retval) |
| 1203 | struct proc *p; |
| 1204 | register struct olstat_args *uap; |
| 1205 | int *retval; |
| 1206 | { |
| 1207 | struct vnode *vp, *dvp; |
| 1208 | struct stat sb, sb1; |
| 1209 | struct ostat osb; |
| 1210 | int error; |
| 1211 | struct nameidata nd; |
| 1212 | |
| 1213 | NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | LOCKPARENT, UIO_USERSPACE, |
| 1214 | uap->path, p); |
| 1215 | if (error = namei(&nd)) |
| 1216 | return (error); |
| 1217 | /* |
| 1218 | * For symbolic links, always return the attributes of its |
| 1219 | * containing directory, except for mode, size, and links. |
| 1220 | */ |
| 1221 | vp = nd.ni_vp; |
| 1222 | dvp = nd.ni_dvp; |
| 1223 | if (vp->v_type != VLNK) { |
| 1224 | if (dvp == vp) |
| 1225 | vrele(dvp); |
| 1226 | else |
| 1227 | vput(dvp); |
| 1228 | error = vn_stat(vp, &sb, p); |
| 1229 | vput(vp); |
| 1230 | if (error) |
| 1231 | return (error); |
| 1232 | } else { |
| 1233 | error = vn_stat(dvp, &sb, p); |
| 1234 | vput(dvp); |
| 1235 | if (error) { |
| 1236 | vput(vp); |
| 1237 | return (error); |
| 1238 | } |
| 1239 | error = vn_stat(vp, &sb1, p); |
| 1240 | vput(vp); |
| 1241 | if (error) |
| 1242 | return (error); |
| 1243 | sb.st_mode &= ~S_IFDIR; |
| 1244 | sb.st_mode |= S_IFLNK; |
| 1245 | sb.st_nlink = sb1.st_nlink; |
| 1246 | sb.st_size = sb1.st_size; |
| 1247 | sb.st_blocks = sb1.st_blocks; |
| 1248 | } |
| 1249 | cvtstat(&sb, &osb); |
| 1250 | error = copyout((caddr_t)&osb, (caddr_t)uap->ub, sizeof (osb)); |
| 1251 | return (error); |
| 1252 | } |
| 1253 | |
| 1254 | /* |
| 1255 | * Convert from an old to a new stat structure. |
| 1256 | */ |
| 1257 | cvtstat(st, ost) |
| 1258 | struct stat *st; |
| 1259 | struct ostat *ost; |
| 1260 | { |
| 1261 | |
| 1262 | ost->st_dev = st->st_dev; |
| 1263 | ost->st_ino = st->st_ino; |
| 1264 | ost->st_mode = st->st_mode; |
| 1265 | ost->st_nlink = st->st_nlink; |
| 1266 | ost->st_uid = st->st_uid; |
| 1267 | ost->st_gid = st->st_gid; |
| 1268 | ost->st_rdev = st->st_rdev; |
| 1269 | if (st->st_size < (quad_t)1 << 32) |
| 1270 | ost->st_size = st->st_size; |
| 1271 | else |
| 1272 | ost->st_size = -2; |
| 1273 | ost->st_atime = st->st_atime; |
| 1274 | ost->st_mtime = st->st_mtime; |
| 1275 | ost->st_ctime = st->st_ctime; |
| 1276 | ost->st_blksize = st->st_blksize; |
| 1277 | ost->st_blocks = st->st_blocks; |
| 1278 | ost->st_flags = st->st_flags; |
| 1279 | ost->st_gen = st->st_gen; |
| 1280 | } |
| 1281 | #endif /* COMPAT_43 || COMPAT_SUNOS */ |
| 1282 | |
| 1283 | /* |
| 1284 | * Get file status; this version follows links. |
| 1285 | */ |
| 1286 | struct stat_args { |
| 1287 | char *path; |
| 1288 | struct stat *ub; |
| 1289 | }; |
| 1290 | /* ARGSUSED */ |
| 1291 | stat(p, uap, retval) |
| 1292 | struct proc *p; |
| 1293 | register struct stat_args *uap; |
| 1294 | int *retval; |
| 1295 | { |
| 1296 | struct stat sb; |
| 1297 | int error; |
| 1298 | struct nameidata nd; |
| 1299 | |
| 1300 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->path, p); |
| 1301 | if (error = namei(&nd)) |
| 1302 | return (error); |
| 1303 | error = vn_stat(nd.ni_vp, &sb, p); |
| 1304 | vput(nd.ni_vp); |
| 1305 | if (error) |
| 1306 | return (error); |
| 1307 | error = copyout((caddr_t)&sb, (caddr_t)uap->ub, sizeof (sb)); |
| 1308 | return (error); |
| 1309 | } |
| 1310 | |
| 1311 | /* |
| 1312 | * Get file status; this version does not follow links. |
| 1313 | */ |
| 1314 | struct lstat_args { |
| 1315 | char *path; |
| 1316 | struct stat *ub; |
| 1317 | }; |
| 1318 | /* ARGSUSED */ |
| 1319 | lstat(p, uap, retval) |
| 1320 | struct proc *p; |
| 1321 | register struct lstat_args *uap; |
| 1322 | int *retval; |
| 1323 | { |
| 1324 | int error; |
| 1325 | struct vnode *vp, *dvp; |
| 1326 | struct stat sb, sb1; |
| 1327 | struct nameidata nd; |
| 1328 | |
| 1329 | NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | LOCKPARENT, UIO_USERSPACE, |
| 1330 | uap->path, p); |
| 1331 | if (error = namei(&nd)) |
| 1332 | return (error); |
| 1333 | /* |
| 1334 | * For symbolic links, always return the attributes of its |
| 1335 | * containing directory, except for mode, size, and links. |
| 1336 | */ |
| 1337 | vp = nd.ni_vp; |
| 1338 | dvp = nd.ni_dvp; |
| 1339 | if (vp->v_type != VLNK) { |
| 1340 | if (dvp == vp) |
| 1341 | vrele(dvp); |
| 1342 | else |
| 1343 | vput(dvp); |
| 1344 | error = vn_stat(vp, &sb, p); |
| 1345 | vput(vp); |
| 1346 | if (error) |
| 1347 | return (error); |
| 1348 | } else { |
| 1349 | error = vn_stat(dvp, &sb, p); |
| 1350 | vput(dvp); |
| 1351 | if (error) { |
| 1352 | vput(vp); |
| 1353 | return (error); |
| 1354 | } |
| 1355 | error = vn_stat(vp, &sb1, p); |
| 1356 | vput(vp); |
| 1357 | if (error) |
| 1358 | return (error); |
| 1359 | sb.st_mode &= ~S_IFDIR; |
| 1360 | sb.st_mode |= S_IFLNK; |
| 1361 | sb.st_nlink = sb1.st_nlink; |
| 1362 | sb.st_size = sb1.st_size; |
| 1363 | sb.st_blocks = sb1.st_blocks; |
| 1364 | } |
| 1365 | error = copyout((caddr_t)&sb, (caddr_t)uap->ub, sizeof (sb)); |
| 1366 | return (error); |
| 1367 | } |
| 1368 | |
| 1369 | /* |
| 1370 | * Get configurable pathname variables. |
| 1371 | */ |
| 1372 | struct pathconf_args { |
| 1373 | char *path; |
| 1374 | int name; |
| 1375 | }; |
| 1376 | /* ARGSUSED */ |
| 1377 | pathconf(p, uap, retval) |
| 1378 | struct proc *p; |
| 1379 | register struct pathconf_args *uap; |
| 1380 | int *retval; |
| 1381 | { |
| 1382 | int error; |
| 1383 | struct nameidata nd; |
| 1384 | |
| 1385 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->path, p); |
| 1386 | if (error = namei(&nd)) |
| 1387 | return (error); |
| 1388 | error = VOP_PATHCONF(nd.ni_vp, uap->name, retval); |
| 1389 | vput(nd.ni_vp); |
| 1390 | return (error); |
| 1391 | } |
| 1392 | |
| 1393 | /* |
| 1394 | * Return target name of a symbolic link. |
| 1395 | */ |
| 1396 | struct readlink_args { |
| 1397 | char *path; |
| 1398 | char *buf; |
| 1399 | int count; |
| 1400 | }; |
| 1401 | /* ARGSUSED */ |
| 1402 | readlink(p, uap, retval) |
| 1403 | struct proc *p; |
| 1404 | register struct readlink_args *uap; |
| 1405 | int *retval; |
| 1406 | { |
| 1407 | register struct vnode *vp; |
| 1408 | struct iovec aiov; |
| 1409 | struct uio auio; |
| 1410 | int error; |
| 1411 | struct nameidata nd; |
| 1412 | |
| 1413 | CHECKPOINTREF; |
| 1414 | NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, uap->path, p); |
| 1415 | if (error = namei(&nd)) |
| 1416 | return (error); |
| 1417 | vp = nd.ni_vp; |
| 1418 | if (vp->v_type != VLNK) |
| 1419 | error = EINVAL; |
| 1420 | else { |
| 1421 | aiov.iov_base = uap->buf; |
| 1422 | aiov.iov_len = uap->count; |
| 1423 | auio.uio_iov = &aiov; |
| 1424 | auio.uio_iovcnt = 1; |
| 1425 | auio.uio_offset = 0; |
| 1426 | auio.uio_rw = UIO_READ; |
| 1427 | auio.uio_segflg = UIO_USERSPACE; |
| 1428 | auio.uio_procp = p; |
| 1429 | auio.uio_resid = uap->count; |
| 1430 | error = VOP_READLINK(vp, &auio, p->p_ucred); |
| 1431 | } |
| 1432 | vput(vp); |
| 1433 | *retval = uap->count - auio.uio_resid; |
| 1434 | CHECKREFS("readlink"); |
| 1435 | return (error); |
| 1436 | } |
| 1437 | |
| 1438 | /* |
| 1439 | * Change flags of a file given a path name. |
| 1440 | */ |
| 1441 | struct chflags_args { |
| 1442 | char *path; |
| 1443 | int flags; |
| 1444 | }; |
| 1445 | /* ARGSUSED */ |
| 1446 | chflags(p, uap, retval) |
| 1447 | struct proc *p; |
| 1448 | register struct chflags_args *uap; |
| 1449 | int *retval; |
| 1450 | { |
| 1451 | register struct vnode *vp; |
| 1452 | struct vattr vattr; |
| 1453 | int error; |
| 1454 | struct nameidata nd; |
| 1455 | |
| 1456 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p); |
| 1457 | if (error = namei(&nd)) |
| 1458 | return (error); |
| 1459 | vp = nd.ni_vp; |
| 1460 | VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); |
| 1461 | VOP_LOCK(vp); |
| 1462 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
| 1463 | error = EROFS; |
| 1464 | else { |
| 1465 | VATTR_NULL(&vattr); |
| 1466 | vattr.va_flags = uap->flags; |
| 1467 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 1468 | } |
| 1469 | vput(vp); |
| 1470 | return (error); |
| 1471 | } |
| 1472 | |
| 1473 | /* |
| 1474 | * Change flags of a file given a file descriptor. |
| 1475 | */ |
| 1476 | struct fchflags_args { |
| 1477 | int fd; |
| 1478 | int flags; |
| 1479 | }; |
| 1480 | /* ARGSUSED */ |
| 1481 | fchflags(p, uap, retval) |
| 1482 | struct proc *p; |
| 1483 | register struct fchflags_args *uap; |
| 1484 | int *retval; |
| 1485 | { |
| 1486 | struct vattr vattr; |
| 1487 | struct vnode *vp; |
| 1488 | struct file *fp; |
| 1489 | int error; |
| 1490 | |
| 1491 | if (error = getvnode(p->p_fd, uap->fd, &fp)) |
| 1492 | return (error); |
| 1493 | vp = (struct vnode *)fp->f_data; |
| 1494 | VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); |
| 1495 | VOP_LOCK(vp); |
| 1496 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
| 1497 | error = EROFS; |
| 1498 | else { |
| 1499 | VATTR_NULL(&vattr); |
| 1500 | vattr.va_flags = uap->flags; |
| 1501 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 1502 | } |
| 1503 | VOP_UNLOCK(vp); |
| 1504 | return (error); |
| 1505 | } |
| 1506 | |
| 1507 | /* |
| 1508 | * Change mode of a file given path name. |
| 1509 | */ |
| 1510 | struct chmod_args { |
| 1511 | char *path; |
| 1512 | int mode; |
| 1513 | }; |
| 1514 | /* ARGSUSED */ |
| 1515 | chmod(p, uap, retval) |
| 1516 | struct proc *p; |
| 1517 | register struct chmod_args *uap; |
| 1518 | int *retval; |
| 1519 | { |
| 1520 | register struct vnode *vp; |
| 1521 | struct vattr vattr; |
| 1522 | int error; |
| 1523 | struct nameidata nd; |
| 1524 | |
| 1525 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p); |
| 1526 | if (error = namei(&nd)) |
| 1527 | return (error); |
| 1528 | vp = nd.ni_vp; |
| 1529 | VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); |
| 1530 | VOP_LOCK(vp); |
| 1531 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
| 1532 | error = EROFS; |
| 1533 | else { |
| 1534 | VATTR_NULL(&vattr); |
| 1535 | vattr.va_mode = uap->mode & ALLPERMS; |
| 1536 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 1537 | } |
| 1538 | vput(vp); |
| 1539 | return (error); |
| 1540 | } |
| 1541 | |
| 1542 | /* |
| 1543 | * Change mode of a file given a file descriptor. |
| 1544 | */ |
| 1545 | struct fchmod_args { |
| 1546 | int fd; |
| 1547 | int mode; |
| 1548 | }; |
| 1549 | /* ARGSUSED */ |
| 1550 | fchmod(p, uap, retval) |
| 1551 | struct proc *p; |
| 1552 | register struct fchmod_args *uap; |
| 1553 | int *retval; |
| 1554 | { |
| 1555 | struct vattr vattr; |
| 1556 | struct vnode *vp; |
| 1557 | struct file *fp; |
| 1558 | int error; |
| 1559 | |
| 1560 | if (error = getvnode(p->p_fd, uap->fd, &fp)) |
| 1561 | return (error); |
| 1562 | vp = (struct vnode *)fp->f_data; |
| 1563 | VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); |
| 1564 | VOP_LOCK(vp); |
| 1565 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
| 1566 | error = EROFS; |
| 1567 | else { |
| 1568 | VATTR_NULL(&vattr); |
| 1569 | vattr.va_mode = uap->mode & ALLPERMS; |
| 1570 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 1571 | } |
| 1572 | VOP_UNLOCK(vp); |
| 1573 | return (error); |
| 1574 | } |
| 1575 | |
| 1576 | /* |
| 1577 | * Set ownership given a path name. |
| 1578 | */ |
| 1579 | struct chown_args { |
| 1580 | char *path; |
| 1581 | int uid; |
| 1582 | int gid; |
| 1583 | }; |
| 1584 | /* ARGSUSED */ |
| 1585 | chown(p, uap, retval) |
| 1586 | struct proc *p; |
| 1587 | register struct chown_args *uap; |
| 1588 | int *retval; |
| 1589 | { |
| 1590 | register struct vnode *vp; |
| 1591 | struct vattr vattr; |
| 1592 | int error; |
| 1593 | struct nameidata nd; |
| 1594 | |
| 1595 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p); |
| 1596 | if (error = namei(&nd)) |
| 1597 | return (error); |
| 1598 | vp = nd.ni_vp; |
| 1599 | VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); |
| 1600 | VOP_LOCK(vp); |
| 1601 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
| 1602 | error = EROFS; |
| 1603 | else { |
| 1604 | VATTR_NULL(&vattr); |
| 1605 | vattr.va_uid = uap->uid; |
| 1606 | vattr.va_gid = uap->gid; |
| 1607 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 1608 | } |
| 1609 | vput(vp); |
| 1610 | return (error); |
| 1611 | } |
| 1612 | |
| 1613 | /* |
| 1614 | * Set ownership given a file descriptor. |
| 1615 | */ |
| 1616 | struct fchown_args { |
| 1617 | int fd; |
| 1618 | int uid; |
| 1619 | int gid; |
| 1620 | }; |
| 1621 | /* ARGSUSED */ |
| 1622 | fchown(p, uap, retval) |
| 1623 | struct proc *p; |
| 1624 | register struct fchown_args *uap; |
| 1625 | int *retval; |
| 1626 | { |
| 1627 | struct vattr vattr; |
| 1628 | struct vnode *vp; |
| 1629 | struct file *fp; |
| 1630 | int error; |
| 1631 | |
| 1632 | if (error = getvnode(p->p_fd, uap->fd, &fp)) |
| 1633 | return (error); |
| 1634 | vp = (struct vnode *)fp->f_data; |
| 1635 | VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); |
| 1636 | VOP_LOCK(vp); |
| 1637 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
| 1638 | error = EROFS; |
| 1639 | else { |
| 1640 | VATTR_NULL(&vattr); |
| 1641 | vattr.va_uid = uap->uid; |
| 1642 | vattr.va_gid = uap->gid; |
| 1643 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 1644 | } |
| 1645 | VOP_UNLOCK(vp); |
| 1646 | return (error); |
| 1647 | } |
| 1648 | |
| 1649 | /* |
| 1650 | * Set the access and modification times of a file. |
| 1651 | */ |
| 1652 | struct utimes_args { |
| 1653 | char *path; |
| 1654 | struct timeval *tptr; |
| 1655 | }; |
| 1656 | /* ARGSUSED */ |
| 1657 | utimes(p, uap, retval) |
| 1658 | struct proc *p; |
| 1659 | register struct utimes_args *uap; |
| 1660 | int *retval; |
| 1661 | { |
| 1662 | register struct vnode *vp; |
| 1663 | struct timeval tv[2]; |
| 1664 | struct vattr vattr; |
| 1665 | int error; |
| 1666 | struct nameidata nd; |
| 1667 | |
| 1668 | VATTR_NULL(&vattr); |
| 1669 | if (uap->tptr == NULL) { |
| 1670 | microtime(&tv[0]); |
| 1671 | tv[1] = tv[0]; |
| 1672 | vattr.va_vaflags |= VA_UTIMES_NULL; |
| 1673 | } else if (error = copyin((caddr_t)uap->tptr, (caddr_t)tv, sizeof (tv))) |
| 1674 | return (error); |
| 1675 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p); |
| 1676 | if (error = namei(&nd)) |
| 1677 | return (error); |
| 1678 | vp = nd.ni_vp; |
| 1679 | VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); |
| 1680 | VOP_LOCK(vp); |
| 1681 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
| 1682 | error = EROFS; |
| 1683 | else { |
| 1684 | vattr.va_atime.ts_sec = tv[0].tv_sec; |
| 1685 | vattr.va_atime.ts_nsec = tv[0].tv_usec * 1000; |
| 1686 | vattr.va_mtime.ts_sec = tv[1].tv_sec; |
| 1687 | vattr.va_mtime.ts_nsec = tv[1].tv_usec * 1000; |
| 1688 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 1689 | } |
| 1690 | vput(vp); |
| 1691 | return (error); |
| 1692 | } |
| 1693 | |
| 1694 | /* |
| 1695 | * Truncate a file given its path name. |
| 1696 | */ |
| 1697 | struct truncate_args { |
| 1698 | char *path; |
| 1699 | int pad; |
| 1700 | off_t length; |
| 1701 | }; |
| 1702 | /* ARGSUSED */ |
| 1703 | truncate(p, uap, retval) |
| 1704 | struct proc *p; |
| 1705 | register struct truncate_args *uap; |
| 1706 | int *retval; |
| 1707 | { |
| 1708 | register struct vnode *vp; |
| 1709 | struct vattr vattr; |
| 1710 | int error; |
| 1711 | struct nameidata nd; |
| 1712 | |
| 1713 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p); |
| 1714 | if (error = namei(&nd)) |
| 1715 | return (error); |
| 1716 | vp = nd.ni_vp; |
| 1717 | VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); |
| 1718 | VOP_LOCK(vp); |
| 1719 | if (vp->v_type == VDIR) |
| 1720 | error = EISDIR; |
| 1721 | else if ((error = vn_writechk(vp)) == 0 && |
| 1722 | (error = VOP_ACCESS(vp, VWRITE, p->p_ucred, p)) == 0) { |
| 1723 | VATTR_NULL(&vattr); |
| 1724 | vattr.va_size = uap->length; |
| 1725 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 1726 | } |
| 1727 | vput(vp); |
| 1728 | return (error); |
| 1729 | } |
| 1730 | |
| 1731 | /* |
| 1732 | * Truncate a file given a file descriptor. |
| 1733 | */ |
| 1734 | struct ftruncate_args { |
| 1735 | int fd; |
| 1736 | int pad; |
| 1737 | off_t length; |
| 1738 | }; |
| 1739 | /* ARGSUSED */ |
| 1740 | ftruncate(p, uap, retval) |
| 1741 | struct proc *p; |
| 1742 | register struct ftruncate_args *uap; |
| 1743 | int *retval; |
| 1744 | { |
| 1745 | struct vattr vattr; |
| 1746 | struct vnode *vp; |
| 1747 | struct file *fp; |
| 1748 | int error; |
| 1749 | |
| 1750 | if (error = getvnode(p->p_fd, uap->fd, &fp)) |
| 1751 | return (error); |
| 1752 | if ((fp->f_flag & FWRITE) == 0) |
| 1753 | return (EINVAL); |
| 1754 | vp = (struct vnode *)fp->f_data; |
| 1755 | VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); |
| 1756 | VOP_LOCK(vp); |
| 1757 | if (vp->v_type == VDIR) |
| 1758 | error = EISDIR; |
| 1759 | else if ((error = vn_writechk(vp)) == 0) { |
| 1760 | VATTR_NULL(&vattr); |
| 1761 | vattr.va_size = uap->length; |
| 1762 | error = VOP_SETATTR(vp, &vattr, fp->f_cred, p); |
| 1763 | } |
| 1764 | VOP_UNLOCK(vp); |
| 1765 | return (error); |
| 1766 | } |
| 1767 | |
| 1768 | #if defined(COMPAT_43) || defined(COMPAT_SUNOS) |
| 1769 | /* |
| 1770 | * Truncate a file given its path name. |
| 1771 | */ |
| 1772 | struct otruncate_args { |
| 1773 | char *path; |
| 1774 | long length; |
| 1775 | }; |
| 1776 | /* ARGSUSED */ |
| 1777 | otruncate(p, uap, retval) |
| 1778 | struct proc *p; |
| 1779 | register struct otruncate_args *uap; |
| 1780 | int *retval; |
| 1781 | { |
| 1782 | struct truncate_args nuap; |
| 1783 | |
| 1784 | nuap.path = uap->path; |
| 1785 | nuap.length = uap->length; |
| 1786 | return (truncate(p, &nuap, retval)); |
| 1787 | } |
| 1788 | |
| 1789 | /* |
| 1790 | * Truncate a file given a file descriptor. |
| 1791 | */ |
| 1792 | struct oftruncate_args { |
| 1793 | int fd; |
| 1794 | long length; |
| 1795 | }; |
| 1796 | /* ARGSUSED */ |
| 1797 | oftruncate(p, uap, retval) |
| 1798 | struct proc *p; |
| 1799 | register struct oftruncate_args *uap; |
| 1800 | int *retval; |
| 1801 | { |
| 1802 | struct ftruncate_args nuap; |
| 1803 | |
| 1804 | nuap.fd = uap->fd; |
| 1805 | nuap.length = uap->length; |
| 1806 | return (ftruncate(p, &nuap, retval)); |
| 1807 | } |
| 1808 | #endif /* COMPAT_43 || COMPAT_SUNOS */ |
| 1809 | |
| 1810 | /* |
| 1811 | * Sync an open file. |
| 1812 | */ |
| 1813 | struct fsync_args { |
| 1814 | int fd; |
| 1815 | }; |
| 1816 | /* ARGSUSED */ |
| 1817 | fsync(p, uap, retval) |
| 1818 | struct proc *p; |
| 1819 | struct fsync_args *uap; |
| 1820 | int *retval; |
| 1821 | { |
| 1822 | register struct vnode *vp; |
| 1823 | struct file *fp; |
| 1824 | int error; |
| 1825 | |
| 1826 | if (error = getvnode(p->p_fd, uap->fd, &fp)) |
| 1827 | return (error); |
| 1828 | vp = (struct vnode *)fp->f_data; |
| 1829 | VOP_LOCK(vp); |
| 1830 | error = VOP_FSYNC(vp, fp->f_cred, MNT_WAIT, p); |
| 1831 | VOP_UNLOCK(vp); |
| 1832 | return (error); |
| 1833 | } |
| 1834 | |
| 1835 | /* |
| 1836 | * Rename files. Source and destination must either both be directories, |
| 1837 | * or both not be directories. If target is a directory, it must be empty. |
| 1838 | */ |
| 1839 | struct rename_args { |
| 1840 | char *from; |
| 1841 | char *to; |
| 1842 | }; |
| 1843 | /* ARGSUSED */ |
| 1844 | rename(p, uap, retval) |
| 1845 | struct proc *p; |
| 1846 | register struct rename_args *uap; |
| 1847 | int *retval; |
| 1848 | { |
| 1849 | register struct vnode *tvp, *fvp, *tdvp; |
| 1850 | struct nameidata fromnd, tond; |
| 1851 | int error; |
| 1852 | |
| 1853 | CHECKPOINTREF; |
| 1854 | NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE, |
| 1855 | uap->from, p); |
| 1856 | if (error = namei(&fromnd)) |
| 1857 | return (error); |
| 1858 | fvp = fromnd.ni_vp; |
| 1859 | NDINIT(&tond, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART, |
| 1860 | UIO_USERSPACE, uap->to, p); |
| 1861 | if (error = namei(&tond)) { |
| 1862 | VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); |
| 1863 | vrele(fromnd.ni_dvp); |
| 1864 | vrele(fvp); |
| 1865 | goto out1; |
| 1866 | } |
| 1867 | tdvp = tond.ni_dvp; |
| 1868 | tvp = tond.ni_vp; |
| 1869 | if (tvp != NULL) { |
| 1870 | if (fvp->v_type == VDIR && tvp->v_type != VDIR) { |
| 1871 | error = ENOTDIR; |
| 1872 | goto out; |
| 1873 | } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { |
| 1874 | error = EISDIR; |
| 1875 | goto out; |
| 1876 | } |
| 1877 | } |
| 1878 | if (fvp == tdvp) |
| 1879 | error = EINVAL; |
| 1880 | /* |
| 1881 | * If source is the same as the destination (that is the |
| 1882 | * same inode number with the same name in the same directory), |
| 1883 | * then there is nothing to do. |
| 1884 | */ |
| 1885 | if (fvp == tvp && fromnd.ni_dvp == tdvp && |
| 1886 | fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && |
| 1887 | !bcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, |
| 1888 | fromnd.ni_cnd.cn_namelen)) |
| 1889 | error = -1; |
| 1890 | out: |
| 1891 | if (!error) { |
| 1892 | VOP_LEASE(tdvp, p, p->p_ucred, LEASE_WRITE); |
| 1893 | if (fromnd.ni_dvp != tdvp) |
| 1894 | VOP_LEASE(fromnd.ni_dvp, p, p->p_ucred, LEASE_WRITE); |
| 1895 | if (tvp) |
| 1896 | VOP_LEASE(tvp, p, p->p_ucred, LEASE_WRITE); |
| 1897 | error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, |
| 1898 | tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); |
| 1899 | } else { |
| 1900 | VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); |
| 1901 | if (tdvp == tvp) |
| 1902 | vrele(tdvp); |
| 1903 | else |
| 1904 | vput(tdvp); |
| 1905 | if (tvp) |
| 1906 | vput(tvp); |
| 1907 | VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); |
| 1908 | vrele(fromnd.ni_dvp); |
| 1909 | vrele(fvp); |
| 1910 | } |
| 1911 | p->p_spare[1]--; |
| 1912 | vrele(tond.ni_startdir); |
| 1913 | FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI); |
| 1914 | out1: |
| 1915 | p->p_spare[1]--; |
| 1916 | if (fromnd.ni_startdir) |
| 1917 | vrele(fromnd.ni_startdir); |
| 1918 | FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI); |
| 1919 | CHECKREFS("rename"); |
| 1920 | if (error == -1) |
| 1921 | return (0); |
| 1922 | return (error); |
| 1923 | } |
| 1924 | |
| 1925 | /* |
| 1926 | * Make a directory file. |
| 1927 | */ |
| 1928 | struct mkdir_args { |
| 1929 | char *path; |
| 1930 | int mode; |
| 1931 | }; |
| 1932 | /* ARGSUSED */ |
| 1933 | mkdir(p, uap, retval) |
| 1934 | struct proc *p; |
| 1935 | register struct mkdir_args *uap; |
| 1936 | int *retval; |
| 1937 | { |
| 1938 | register struct vnode *vp; |
| 1939 | struct vattr vattr; |
| 1940 | int error; |
| 1941 | struct nameidata nd; |
| 1942 | |
| 1943 | CHECKPOINTREF; |
| 1944 | NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, uap->path, p); |
| 1945 | if (error = namei(&nd)) |
| 1946 | return (error); |
| 1947 | vp = nd.ni_vp; |
| 1948 | if (vp != NULL) { |
| 1949 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 1950 | if (nd.ni_dvp == vp) |
| 1951 | vrele(nd.ni_dvp); |
| 1952 | else |
| 1953 | vput(nd.ni_dvp); |
| 1954 | vrele(vp); |
| 1955 | CHECKREFS("mkdir1"); |
| 1956 | return (EEXIST); |
| 1957 | } |
| 1958 | VATTR_NULL(&vattr); |
| 1959 | vattr.va_type = VDIR; |
| 1960 | vattr.va_mode = (uap->mode & ACCESSPERMS) &~ p->p_fd->fd_cmask; |
| 1961 | VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); |
| 1962 | error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr); |
| 1963 | if (!error) |
| 1964 | vput(nd.ni_vp); |
| 1965 | CHECKREFS("mkdir2"); |
| 1966 | return (error); |
| 1967 | } |
| 1968 | |
| 1969 | /* |
| 1970 | * Remove a directory file. |
| 1971 | */ |
| 1972 | struct rmdir_args { |
| 1973 | char *path; |
| 1974 | }; |
| 1975 | /* ARGSUSED */ |
| 1976 | rmdir(p, uap, retval) |
| 1977 | struct proc *p; |
| 1978 | struct rmdir_args *uap; |
| 1979 | int *retval; |
| 1980 | { |
| 1981 | register struct vnode *vp; |
| 1982 | int error; |
| 1983 | struct nameidata nd; |
| 1984 | |
| 1985 | CHECKPOINTREF; |
| 1986 | NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE, uap->path, p); |
| 1987 | if (error = namei(&nd)) |
| 1988 | return (error); |
| 1989 | vp = nd.ni_vp; |
| 1990 | if (vp->v_type != VDIR) { |
| 1991 | error = ENOTDIR; |
| 1992 | goto out; |
| 1993 | } |
| 1994 | /* |
| 1995 | * No rmdir "." please. |
| 1996 | */ |
| 1997 | if (nd.ni_dvp == vp) { |
| 1998 | error = EINVAL; |
| 1999 | goto out; |
| 2000 | } |
| 2001 | /* |
| 2002 | * The root of a mounted filesystem cannot be deleted. |
| 2003 | */ |
| 2004 | if (vp->v_flag & VROOT) |
| 2005 | error = EBUSY; |
| 2006 | out: |
| 2007 | if (!error) { |
| 2008 | VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); |
| 2009 | VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); |
| 2010 | error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); |
| 2011 | } else { |
| 2012 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 2013 | if (nd.ni_dvp == vp) |
| 2014 | vrele(nd.ni_dvp); |
| 2015 | else |
| 2016 | vput(nd.ni_dvp); |
| 2017 | vput(vp); |
| 2018 | } |
| 2019 | CHECKREFS("rmdir"); |
| 2020 | return (error); |
| 2021 | } |
| 2022 | |
| 2023 | #ifdef COMPAT_43 |
| 2024 | /* |
| 2025 | * Read a block of directory entries in a file system independent format. |
| 2026 | */ |
| 2027 | struct ogetdirentries_args { |
| 2028 | int fd; |
| 2029 | char *buf; |
| 2030 | u_int count; |
| 2031 | long *basep; |
| 2032 | }; |
| 2033 | ogetdirentries(p, uap, retval) |
| 2034 | struct proc *p; |
| 2035 | register struct ogetdirentries_args *uap; |
| 2036 | int *retval; |
| 2037 | { |
| 2038 | register struct vnode *vp; |
| 2039 | struct file *fp; |
| 2040 | struct uio auio, kuio; |
| 2041 | struct iovec aiov, kiov; |
| 2042 | struct dirent *dp, *edp; |
| 2043 | caddr_t dirbuf; |
| 2044 | int error, eofflag, readcnt; |
| 2045 | long loff; |
| 2046 | |
| 2047 | if (error = getvnode(p->p_fd, uap->fd, &fp)) |
| 2048 | return (error); |
| 2049 | if ((fp->f_flag & FREAD) == 0) |
| 2050 | return (EBADF); |
| 2051 | vp = (struct vnode *)fp->f_data; |
| 2052 | unionread: |
| 2053 | if (vp->v_type != VDIR) |
| 2054 | return (EINVAL); |
| 2055 | aiov.iov_base = uap->buf; |
| 2056 | aiov.iov_len = uap->count; |
| 2057 | auio.uio_iov = &aiov; |
| 2058 | auio.uio_iovcnt = 1; |
| 2059 | auio.uio_rw = UIO_READ; |
| 2060 | auio.uio_segflg = UIO_USERSPACE; |
| 2061 | auio.uio_procp = p; |
| 2062 | auio.uio_resid = uap->count; |
| 2063 | VOP_LOCK(vp); |
| 2064 | loff = auio.uio_offset = fp->f_offset; |
| 2065 | # if (BYTE_ORDER != LITTLE_ENDIAN) |
| 2066 | if (vp->v_mount->mnt_maxsymlinklen <= 0) { |
| 2067 | error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, |
| 2068 | (u_long *)0, 0); |
| 2069 | fp->f_offset = auio.uio_offset; |
| 2070 | } else |
| 2071 | # endif |
| 2072 | { |
| 2073 | kuio = auio; |
| 2074 | kuio.uio_iov = &kiov; |
| 2075 | kuio.uio_segflg = UIO_SYSSPACE; |
| 2076 | kiov.iov_len = uap->count; |
| 2077 | MALLOC(dirbuf, caddr_t, uap->count, M_TEMP, M_WAITOK); |
| 2078 | kiov.iov_base = dirbuf; |
| 2079 | error = VOP_READDIR(vp, &kuio, fp->f_cred, &eofflag, |
| 2080 | (u_long *)0, 0); |
| 2081 | fp->f_offset = kuio.uio_offset; |
| 2082 | if (error == 0) { |
| 2083 | readcnt = uap->count - kuio.uio_resid; |
| 2084 | edp = (struct dirent *)&dirbuf[readcnt]; |
| 2085 | for (dp = (struct dirent *)dirbuf; dp < edp; ) { |
| 2086 | # if (BYTE_ORDER == LITTLE_ENDIAN) |
| 2087 | /* |
| 2088 | * The expected low byte of |
| 2089 | * dp->d_namlen is our dp->d_type. |
| 2090 | * The high MBZ byte of dp->d_namlen |
| 2091 | * is our dp->d_namlen. |
| 2092 | */ |
| 2093 | dp->d_type = dp->d_namlen; |
| 2094 | dp->d_namlen = 0; |
| 2095 | # else |
| 2096 | /* |
| 2097 | * The dp->d_type is the high byte |
| 2098 | * of the expected dp->d_namlen, |
| 2099 | * so must be zero'ed. |
| 2100 | */ |
| 2101 | dp->d_type = 0; |
| 2102 | # endif |
| 2103 | if (dp->d_reclen > 0) { |
| 2104 | dp = (struct dirent *) |
| 2105 | ((char *)dp + dp->d_reclen); |
| 2106 | } else { |
| 2107 | error = EIO; |
| 2108 | break; |
| 2109 | } |
| 2110 | } |
| 2111 | if (dp >= edp) |
| 2112 | error = uiomove(dirbuf, readcnt, &auio); |
| 2113 | } |
| 2114 | FREE(dirbuf, M_TEMP); |
| 2115 | } |
| 2116 | VOP_UNLOCK(vp); |
| 2117 | if (error) |
| 2118 | return (error); |
| 2119 | |
| 2120 | #ifdef UNION |
| 2121 | { |
| 2122 | extern int (**union_vnodeop_p)(); |
| 2123 | extern struct vnode *union_dircache __P((struct vnode *)); |
| 2124 | |
| 2125 | if ((uap->count == auio.uio_resid) && |
| 2126 | (vp->v_op == union_vnodeop_p)) { |
| 2127 | struct vnode *lvp; |
| 2128 | |
| 2129 | lvp = union_dircache(vp); |
| 2130 | if (lvp != NULLVP) { |
| 2131 | struct vattr va; |
| 2132 | |
| 2133 | /* |
| 2134 | * If the directory is opaque, |
| 2135 | * then don't show lower entries |
| 2136 | */ |
| 2137 | error = VOP_GETATTR(vp, &va, fp->f_cred, p); |
| 2138 | if (va.va_flags & OPAQUE) { |
| 2139 | vput(lvp); |
| 2140 | lvp = NULL; |
| 2141 | } |
| 2142 | } |
| 2143 | |
| 2144 | if (lvp != NULLVP) { |
| 2145 | error = VOP_OPEN(lvp, FREAD, fp->f_cred, p); |
| 2146 | VOP_UNLOCK(lvp); |
| 2147 | |
| 2148 | if (error) { |
| 2149 | vrele(lvp); |
| 2150 | return (error); |
| 2151 | } |
| 2152 | fp->f_data = (caddr_t) lvp; |
| 2153 | fp->f_offset = 0; |
| 2154 | error = vn_close(vp, FREAD, fp->f_cred, p); |
| 2155 | if (error) |
| 2156 | return (error); |
| 2157 | vp = lvp; |
| 2158 | goto unionread; |
| 2159 | } |
| 2160 | } |
| 2161 | } |
| 2162 | #endif /* UNION */ |
| 2163 | |
| 2164 | if ((uap->count == auio.uio_resid) && |
| 2165 | (vp->v_flag & VROOT) && |
| 2166 | (vp->v_mount->mnt_flag & MNT_UNION)) { |
| 2167 | struct vnode *tvp = vp; |
| 2168 | vp = vp->v_mount->mnt_vnodecovered; |
| 2169 | VREF(vp); |
| 2170 | fp->f_data = (caddr_t) vp; |
| 2171 | fp->f_offset = 0; |
| 2172 | vrele(tvp); |
| 2173 | goto unionread; |
| 2174 | } |
| 2175 | error = copyout((caddr_t)&loff, (caddr_t)uap->basep, sizeof(long)); |
| 2176 | *retval = uap->count - auio.uio_resid; |
| 2177 | return (error); |
| 2178 | } |
| 2179 | #endif /* COMPAT_43 */ |
| 2180 | |
| 2181 | /* |
| 2182 | * Read a block of directory entries in a file system independent format. |
| 2183 | */ |
| 2184 | struct getdirentries_args { |
| 2185 | int fd; |
| 2186 | char *buf; |
| 2187 | u_int count; |
| 2188 | long *basep; |
| 2189 | }; |
| 2190 | getdirentries(p, uap, retval) |
| 2191 | struct proc *p; |
| 2192 | register struct getdirentries_args *uap; |
| 2193 | int *retval; |
| 2194 | { |
| 2195 | register struct vnode *vp; |
| 2196 | struct file *fp; |
| 2197 | struct uio auio; |
| 2198 | struct iovec aiov; |
| 2199 | long loff; |
| 2200 | int error, eofflag; |
| 2201 | |
| 2202 | if (error = getvnode(p->p_fd, uap->fd, &fp)) |
| 2203 | return (error); |
| 2204 | if ((fp->f_flag & FREAD) == 0) |
| 2205 | return (EBADF); |
| 2206 | vp = (struct vnode *)fp->f_data; |
| 2207 | unionread: |
| 2208 | if (vp->v_type != VDIR) |
| 2209 | return (EINVAL); |
| 2210 | aiov.iov_base = uap->buf; |
| 2211 | aiov.iov_len = uap->count; |
| 2212 | auio.uio_iov = &aiov; |
| 2213 | auio.uio_iovcnt = 1; |
| 2214 | auio.uio_rw = UIO_READ; |
| 2215 | auio.uio_segflg = UIO_USERSPACE; |
| 2216 | auio.uio_procp = p; |
| 2217 | auio.uio_resid = uap->count; |
| 2218 | VOP_LOCK(vp); |
| 2219 | loff = auio.uio_offset = fp->f_offset; |
| 2220 | error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, (u_long *)0, 0); |
| 2221 | fp->f_offset = auio.uio_offset; |
| 2222 | VOP_UNLOCK(vp); |
| 2223 | if (error) |
| 2224 | return (error); |
| 2225 | |
| 2226 | #ifdef UNION |
| 2227 | { |
| 2228 | extern int (**union_vnodeop_p)(); |
| 2229 | extern struct vnode *union_dircache __P((struct vnode *)); |
| 2230 | |
| 2231 | if ((uap->count == auio.uio_resid) && |
| 2232 | (vp->v_op == union_vnodeop_p)) { |
| 2233 | struct vnode *lvp; |
| 2234 | |
| 2235 | lvp = union_dircache(vp); |
| 2236 | if (lvp != NULLVP) { |
| 2237 | struct vattr va; |
| 2238 | |
| 2239 | /* |
| 2240 | * If the directory is opaque, |
| 2241 | * then don't show lower entries |
| 2242 | */ |
| 2243 | error = VOP_GETATTR(vp, &va, fp->f_cred, p); |
| 2244 | if (va.va_flags & OPAQUE) { |
| 2245 | vput(lvp); |
| 2246 | lvp = NULL; |
| 2247 | } |
| 2248 | } |
| 2249 | |
| 2250 | if (lvp != NULLVP) { |
| 2251 | error = VOP_OPEN(lvp, FREAD, fp->f_cred, p); |
| 2252 | VOP_UNLOCK(lvp); |
| 2253 | |
| 2254 | if (error) { |
| 2255 | vrele(lvp); |
| 2256 | return (error); |
| 2257 | } |
| 2258 | fp->f_data = (caddr_t) lvp; |
| 2259 | fp->f_offset = 0; |
| 2260 | error = vn_close(vp, FREAD, fp->f_cred, p); |
| 2261 | if (error) |
| 2262 | return (error); |
| 2263 | vp = lvp; |
| 2264 | goto unionread; |
| 2265 | } |
| 2266 | } |
| 2267 | } |
| 2268 | #endif |
| 2269 | |
| 2270 | if ((uap->count == auio.uio_resid) && |
| 2271 | (vp->v_flag & VROOT) && |
| 2272 | (vp->v_mount->mnt_flag & MNT_UNION)) { |
| 2273 | struct vnode *tvp = vp; |
| 2274 | vp = vp->v_mount->mnt_vnodecovered; |
| 2275 | VREF(vp); |
| 2276 | fp->f_data = (caddr_t) vp; |
| 2277 | fp->f_offset = 0; |
| 2278 | vrele(tvp); |
| 2279 | goto unionread; |
| 2280 | } |
| 2281 | error = copyout((caddr_t)&loff, (caddr_t)uap->basep, sizeof(long)); |
| 2282 | *retval = uap->count - auio.uio_resid; |
| 2283 | return (error); |
| 2284 | } |
| 2285 | |
| 2286 | /* |
| 2287 | * Set the mode mask for creation of filesystem nodes. |
| 2288 | */ |
| 2289 | struct umask_args { |
| 2290 | int newmask; |
| 2291 | }; |
| 2292 | mode_t /* XXX */ |
| 2293 | umask(p, uap, retval) |
| 2294 | struct proc *p; |
| 2295 | struct umask_args *uap; |
| 2296 | int *retval; |
| 2297 | { |
| 2298 | register struct filedesc *fdp; |
| 2299 | |
| 2300 | fdp = p->p_fd; |
| 2301 | *retval = fdp->fd_cmask; |
| 2302 | fdp->fd_cmask = uap->newmask & ALLPERMS; |
| 2303 | return (0); |
| 2304 | } |
| 2305 | |
| 2306 | /* |
| 2307 | * Void all references to file by ripping underlying filesystem |
| 2308 | * away from vnode. |
| 2309 | */ |
| 2310 | struct revoke_args { |
| 2311 | char *path; |
| 2312 | }; |
| 2313 | /* ARGSUSED */ |
| 2314 | revoke(p, uap, retval) |
| 2315 | struct proc *p; |
| 2316 | register struct revoke_args *uap; |
| 2317 | int *retval; |
| 2318 | { |
| 2319 | register struct vnode *vp; |
| 2320 | struct vattr vattr; |
| 2321 | int error; |
| 2322 | struct nameidata nd; |
| 2323 | |
| 2324 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p); |
| 2325 | if (error = namei(&nd)) |
| 2326 | return (error); |
| 2327 | vp = nd.ni_vp; |
| 2328 | if (vp->v_type != VCHR && vp->v_type != VBLK) { |
| 2329 | error = EINVAL; |
| 2330 | goto out; |
| 2331 | } |
| 2332 | if (error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) |
| 2333 | goto out; |
| 2334 | if (p->p_ucred->cr_uid != vattr.va_uid && |
| 2335 | (error = suser(p->p_ucred, &p->p_acflag))) |
| 2336 | goto out; |
| 2337 | if (vp->v_usecount > 1 || (vp->v_flag & VALIASED)) |
| 2338 | vgoneall(vp); |
| 2339 | out: |
| 2340 | vrele(vp); |
| 2341 | return (error); |
| 2342 | } |
| 2343 | |
| 2344 | /* |
| 2345 | * Convert a user file descriptor to a kernel file entry. |
| 2346 | */ |
| 2347 | getvnode(fdp, fd, fpp) |
| 2348 | struct filedesc *fdp; |
| 2349 | struct file **fpp; |
| 2350 | int fd; |
| 2351 | { |
| 2352 | struct file *fp; |
| 2353 | |
| 2354 | if ((u_int)fd >= fdp->fd_nfiles || |
| 2355 | (fp = fdp->fd_ofiles[fd]) == NULL) |
| 2356 | return (EBADF); |
| 2357 | if (fp->f_type != DTYPE_VNODE) |
| 2358 | return (EINVAL); |
| 2359 | *fpp = fp; |
| 2360 | return (0); |
| 2361 | } |