2179 lines
48 KiB
C
2179 lines
48 KiB
C
/* $NetBSD: vfs_syscalls.c,v 1.42 1994/12/13 21:52:42 mycroft Exp $ */
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/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)vfs_syscalls.c 8.15 (Berkeley) 6/4/94
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/namei.h>
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#include <sys/filedesc.h>
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#include <sys/kernel.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/uio.h>
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#include <sys/malloc.h>
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#include <sys/dirent.h>
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#include <sys/syscallargs.h>
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#include <vm/vm.h>
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#include <sys/sysctl.h>
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static int change_dir __P((struct nameidata *ndp, struct proc *p));
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/*
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* Virtual File System System Calls
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*/
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/*
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* Mount a file system.
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*/
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/* ARGSUSED */
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mount(p, uap, retval)
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struct proc *p;
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register struct mount_args /* {
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syscallarg(char *) type;
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syscallarg(char *) path;
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syscallarg(int) flags;
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syscallarg(caddr_t) data;
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} */ *uap;
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register_t *retval;
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{
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register struct vnode *vp;
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register struct mount *mp;
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int error, flag;
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u_long fsindex;
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char fstypename[MFSNAMELEN];
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struct nameidata nd;
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/*
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* Must be super user
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*/
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if (error = suser(p->p_ucred, &p->p_acflag))
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return (error);
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/*
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* Get vnode to be covered
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*/
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NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
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SCARG(uap, path), p);
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if (error = namei(&nd))
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return (error);
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vp = nd.ni_vp;
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if (SCARG(uap, flags) & MNT_UPDATE) {
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if ((vp->v_flag & VROOT) == 0) {
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vput(vp);
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return (EINVAL);
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}
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mp = vp->v_mount;
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flag = mp->mnt_flag;
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/*
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* We only allow the filesystem to be reloaded if it
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* is currently mounted read-only.
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*/
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if ((SCARG(uap, flags) & MNT_RELOAD) &&
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((mp->mnt_flag & MNT_RDONLY) == 0)) {
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vput(vp);
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return (EOPNOTSUPP); /* Needs translation */
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}
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mp->mnt_flag |=
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SCARG(uap, flags) & (MNT_RELOAD | MNT_FORCE | MNT_UPDATE);
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VOP_UNLOCK(vp);
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goto update;
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}
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if (error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 0))
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return (error);
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if (vp->v_type != VDIR) {
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vput(vp);
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return (ENOTDIR);
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}
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if (error = copyin(SCARG(uap, type), fstypename, MFSNAMELEN)) {
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#ifdef COMPAT_09
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goto check_num;
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#else
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vput(vp);
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return (error);
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#endif
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}
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fstypename[MFSNAMELEN] = '\0';
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for (fsindex = 0; fsindex < nvfssw; fsindex++)
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if (vfssw[fsindex] != NULL &&
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!strncmp(vfssw[fsindex]->vfs_name, fstypename, MFSNAMELEN))
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break;
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if (fsindex >= nvfssw) {
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#ifdef COMPAT_09
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check_num:
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fsindex = (unsigned long)SCARG(uap, type);
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if (fsindex >= nvfssw || vfssw[fsindex] == NULL) {
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vput(vp);
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return (ENODEV);
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}
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#else
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vput(vp);
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return (ENODEV);
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#endif
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}
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/*
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* Allocate and initialize the file system.
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*/
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mp = (struct mount *)malloc((u_long)sizeof(struct mount),
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M_MOUNT, M_WAITOK);
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bzero((char *)mp, (u_long)sizeof(struct mount));
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mp->mnt_op = vfssw[fsindex];
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if (error = vfs_lock(mp)) {
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free((caddr_t)mp, M_MOUNT);
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vput(vp);
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return (error);
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}
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if (vp->v_mountedhere != NULL) {
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vfs_unlock(mp);
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free((caddr_t)mp, M_MOUNT);
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vput(vp);
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return (EBUSY);
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}
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/* Do this early in case we block later. */
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vfssw[fsindex]->vfs_refcount++;
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vp->v_mountedhere = mp;
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mp->mnt_vnodecovered = vp;
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update:
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/*
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* Set the mount level flags.
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*/
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if (SCARG(uap, flags) & MNT_RDONLY)
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mp->mnt_flag |= MNT_RDONLY;
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else if (mp->mnt_flag & MNT_RDONLY)
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mp->mnt_flag |= MNT_WANTRDWR;
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mp->mnt_flag &=~ (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |
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MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC);
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mp->mnt_flag |= SCARG(uap, flags) & (MNT_NOSUID | MNT_NOEXEC |
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MNT_NODEV | MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC);
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/*
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* Mount the filesystem.
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*/
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error = VFS_MOUNT(mp, SCARG(uap, path), SCARG(uap, data), &nd, p);
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if (mp->mnt_flag & MNT_UPDATE) {
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vrele(vp);
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if (mp->mnt_flag & MNT_WANTRDWR)
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mp->mnt_flag &= ~MNT_RDONLY;
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mp->mnt_flag &=~
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(MNT_UPDATE | MNT_RELOAD | MNT_FORCE | MNT_WANTRDWR);
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if (error)
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mp->mnt_flag = flag;
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return (error);
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}
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/*
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* Put the new filesystem on the mount list after root.
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*/
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cache_purge(vp);
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if (!error) {
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TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list);
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VOP_UNLOCK(vp);
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vfs_unlock(mp);
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error = VFS_START(mp, 0, p);
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} else {
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mp->mnt_vnodecovered->v_mountedhere = (struct mount *)0;
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vfssw[fsindex]->vfs_refcount--;
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vfs_unlock(mp);
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free((caddr_t)mp, M_MOUNT);
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vput(vp);
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}
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return (error);
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}
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/*
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* Unmount a file system.
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*
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* Note: unmount takes a path to the vnode mounted on as argument,
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* not special file (as before).
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*/
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/* ARGSUSED */
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unmount(p, uap, retval)
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struct proc *p;
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register struct unmount_args /* {
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syscallarg(char *) path;
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syscallarg(int) flags;
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} */ *uap;
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register_t *retval;
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{
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register struct vnode *vp;
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struct mount *mp;
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int error;
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struct nameidata nd;
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NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
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SCARG(uap, path), p);
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if (error = namei(&nd))
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return (error);
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vp = nd.ni_vp;
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/*
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* Unless this is a user mount, then must
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* have suser privilege.
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*/
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if (((vp->v_mount->mnt_flag & MNT_USER) == 0) &&
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(error = suser(p->p_ucred, &p->p_acflag))) {
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vput(vp);
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return (error);
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}
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/*
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* Must be the root of the filesystem
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*/
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if ((vp->v_flag & VROOT) == 0) {
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vput(vp);
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return (EINVAL);
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}
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mp = vp->v_mount;
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vput(vp);
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return (dounmount(mp, SCARG(uap, flags), p));
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}
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/*
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* Do the actual file system unmount.
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*/
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dounmount(mp, flags, p)
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register struct mount *mp;
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int flags;
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struct proc *p;
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{
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struct vnode *coveredvp;
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int error;
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coveredvp = mp->mnt_vnodecovered;
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if (vfs_busy(mp))
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return (EBUSY);
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mp->mnt_flag |= MNT_UNMOUNT;
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if (error = vfs_lock(mp))
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return (error);
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mp->mnt_flag &=~ MNT_ASYNC;
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vnode_pager_umount(mp); /* release cached vnodes */
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cache_purgevfs(mp); /* remove cache entries for this file sys */
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if ((error = VFS_SYNC(mp, MNT_WAIT, p->p_ucred, p)) == 0 ||
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(flags & MNT_FORCE))
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error = VFS_UNMOUNT(mp, flags, p);
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mp->mnt_flag &= ~MNT_UNMOUNT;
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vfs_unbusy(mp);
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if (error) {
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vfs_unlock(mp);
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} else {
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vrele(coveredvp);
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TAILQ_REMOVE(&mountlist, mp, mnt_list);
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mp->mnt_vnodecovered->v_mountedhere = (struct mount *)0;
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mp->mnt_op->vfs_refcount--;
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vfs_unlock(mp);
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if (mp->mnt_vnodelist.lh_first != NULL)
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panic("unmount: dangling vnode");
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free((caddr_t)mp, M_MOUNT);
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}
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return (error);
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}
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/*
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* Sync each mounted filesystem.
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*/
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#ifdef DEBUG
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int syncprt = 0;
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struct ctldebug debug0 = { "syncprt", &syncprt };
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#endif
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/* ARGSUSED */
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sync(p, uap, retval)
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struct proc *p;
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void *uap;
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register_t *retval;
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{
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register struct mount *mp, *nmp;
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int asyncflag;
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for (mp = mountlist.tqh_first; mp != NULL; mp = nmp) {
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nmp = mp->mnt_list.tqe_next;
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/*
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* The lock check below is to avoid races with mount
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* and unmount.
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*/
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if ((mp->mnt_flag & (MNT_MLOCK|MNT_RDONLY|MNT_MPBUSY)) == 0 &&
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!vfs_busy(mp)) {
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asyncflag = mp->mnt_flag & MNT_ASYNC;
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mp->mnt_flag &= ~MNT_ASYNC;
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VFS_SYNC(mp, MNT_NOWAIT, p->p_ucred, p);
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if (asyncflag)
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mp->mnt_flag |= MNT_ASYNC;
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vfs_unbusy(mp);
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nmp = mp->mnt_list.tqe_next;
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}
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}
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#ifdef DEBUG
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if (syncprt)
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vfs_bufstats();
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#endif /* DEBUG */
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return (0);
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}
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/*
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* Change filesystem quotas.
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*/
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/* ARGSUSED */
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quotactl(p, uap, retval)
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struct proc *p;
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register struct quotactl_args /* {
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syscallarg(char *) path;
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syscallarg(int) cmd;
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syscallarg(int) uid;
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syscallarg(caddr_t) arg;
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} */ *uap;
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register_t *retval;
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{
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register struct mount *mp;
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int error;
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struct nameidata nd;
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NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
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if (error = namei(&nd))
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return (error);
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mp = nd.ni_vp->v_mount;
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vrele(nd.ni_vp);
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return (VFS_QUOTACTL(mp, SCARG(uap, cmd), SCARG(uap, uid),
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SCARG(uap, arg), p));
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}
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/*
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* Get filesystem statistics.
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*/
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/* ARGSUSED */
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statfs(p, uap, retval)
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struct proc *p;
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register struct statfs_args /* {
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syscallarg(char *) path;
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syscallarg(struct statfs *) buf;
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} */ *uap;
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register_t *retval;
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{
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register struct mount *mp;
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register struct statfs *sp;
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int error;
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struct nameidata nd;
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NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
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if (error = namei(&nd))
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return (error);
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mp = nd.ni_vp->v_mount;
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sp = &mp->mnt_stat;
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vrele(nd.ni_vp);
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if (error = VFS_STATFS(mp, sp, p))
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return (error);
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sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
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return (copyout((caddr_t)sp, (caddr_t)SCARG(uap, buf), sizeof(*sp)));
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}
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/*
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* Get filesystem statistics.
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*/
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/* ARGSUSED */
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fstatfs(p, uap, retval)
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struct proc *p;
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register struct fstatfs_args /* {
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syscallarg(int) fd;
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syscallarg(struct statfs *) buf;
|
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} */ *uap;
|
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register_t *retval;
|
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{
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struct file *fp;
|
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struct mount *mp;
|
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register struct statfs *sp;
|
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int error;
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|
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if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
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return (error);
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mp = ((struct vnode *)fp->f_data)->v_mount;
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sp = &mp->mnt_stat;
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if (error = VFS_STATFS(mp, sp, p))
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return (error);
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sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
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return (copyout((caddr_t)sp, (caddr_t)SCARG(uap, buf), sizeof(*sp)));
|
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}
|
|
|
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/*
|
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* Get statistics on all filesystems.
|
|
*/
|
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getfsstat(p, uap, retval)
|
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struct proc *p;
|
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register struct getfsstat_args /* {
|
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syscallarg(struct statfs *) buf;
|
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syscallarg(long) bufsize;
|
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syscallarg(int) flags;
|
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} */ *uap;
|
|
register_t *retval;
|
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{
|
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register struct mount *mp, *nmp;
|
|
register struct statfs *sp;
|
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caddr_t sfsp;
|
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long count, maxcount, error;
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|
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maxcount = SCARG(uap, bufsize) / sizeof(struct statfs);
|
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sfsp = (caddr_t)SCARG(uap, buf);
|
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for (count = 0, mp = mountlist.tqh_first; mp != NULL; mp = nmp) {
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nmp = mp->mnt_list.tqe_next;
|
|
if (sfsp && count < maxcount &&
|
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((mp->mnt_flag & MNT_MLOCK) == 0)) {
|
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sp = &mp->mnt_stat;
|
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/*
|
|
* If MNT_NOWAIT is specified, do not refresh the
|
|
* fsstat cache. MNT_WAIT overrides MNT_NOWAIT.
|
|
*/
|
|
if (((SCARG(uap, flags) & MNT_NOWAIT) == 0 ||
|
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(SCARG(uap, flags) & MNT_WAIT)) &&
|
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(error = VFS_STATFS(mp, sp, p)))
|
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continue;
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
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if (error = copyout((caddr_t)sp, sfsp, sizeof(*sp)))
|
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return (error);
|
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sfsp += sizeof(*sp);
|
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}
|
|
count++;
|
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}
|
|
if (sfsp && count > maxcount)
|
|
*retval = maxcount;
|
|
else
|
|
*retval = count;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Change current working directory to a given file descriptor.
|
|
*/
|
|
/* ARGSUSED */
|
|
fchdir(p, uap, retval)
|
|
struct proc *p;
|
|
struct fchdir_args /* {
|
|
syscallarg(int) fd;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct filedesc *fdp = p->p_fd;
|
|
register struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if (error = getvnode(fdp, SCARG(uap, fd), &fp))
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
VOP_LOCK(vp);
|
|
if (vp->v_type != VDIR)
|
|
error = ENOTDIR;
|
|
else
|
|
error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);
|
|
VOP_UNLOCK(vp);
|
|
if (error)
|
|
return (error);
|
|
VREF(vp);
|
|
vrele(fdp->fd_cdir);
|
|
fdp->fd_cdir = vp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Change current working directory (``.'').
|
|
*/
|
|
/* ARGSUSED */
|
|
chdir(p, uap, retval)
|
|
struct proc *p;
|
|
struct chdir_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct filedesc *fdp = p->p_fd;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if (error = change_dir(&nd, p))
|
|
return (error);
|
|
vrele(fdp->fd_cdir);
|
|
fdp->fd_cdir = nd.ni_vp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Change notion of root (``/'') directory.
|
|
*/
|
|
/* ARGSUSED */
|
|
chroot(p, uap, retval)
|
|
struct proc *p;
|
|
struct chroot_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct filedesc *fdp = p->p_fd;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
if (error = suser(p->p_ucred, &p->p_acflag))
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if (error = change_dir(&nd, p))
|
|
return (error);
|
|
if (fdp->fd_rdir != NULL)
|
|
vrele(fdp->fd_rdir);
|
|
fdp->fd_rdir = nd.ni_vp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Common routine for chroot and chdir.
|
|
*/
|
|
static int
|
|
change_dir(ndp, p)
|
|
register struct nameidata *ndp;
|
|
struct proc *p;
|
|
{
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
if (error = namei(ndp))
|
|
return (error);
|
|
vp = ndp->ni_vp;
|
|
if (vp->v_type != VDIR)
|
|
error = ENOTDIR;
|
|
else
|
|
error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);
|
|
VOP_UNLOCK(vp);
|
|
if (error)
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check permissions, allocate an open file structure,
|
|
* and call the device open routine if any.
|
|
*/
|
|
open(p, uap, retval)
|
|
struct proc *p;
|
|
register struct open_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct filedesc *fdp = p->p_fd;
|
|
register struct file *fp;
|
|
register struct vnode *vp;
|
|
int flags, cmode;
|
|
struct file *nfp;
|
|
int type, indx, error;
|
|
struct flock lf;
|
|
struct nameidata nd;
|
|
extern struct fileops vnops;
|
|
|
|
if (error = falloc(p, &nfp, &indx))
|
|
return (error);
|
|
fp = nfp;
|
|
flags = FFLAGS(SCARG(uap, flags));
|
|
cmode = ((SCARG(uap, mode) &~ fdp->fd_cmask) & ALLPERMS) &~ S_ISTXT;
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
p->p_dupfd = -indx - 1; /* XXX check for fdopen */
|
|
fp->f_data = (caddr_t) NULL;
|
|
if (error = vn_open(&nd, flags, cmode, fp)) {
|
|
ffree(fp);
|
|
if (p->p_dupfd >= 0) {
|
|
switch (error) {
|
|
case ENODEV: /* XXX from fdopen or fdesc_open */
|
|
return (finishdup(fdp, p->p_dupfd, indx, retval));
|
|
|
|
case ENXIO: /* XXX from portal_open */
|
|
return (finishmove(fdp, p->p_dupfd, indx, retval));
|
|
}
|
|
}
|
|
if (error == ERESTART)
|
|
error = EINTR;
|
|
fdp->fd_ofiles[indx] = NULL;
|
|
return (error);
|
|
}
|
|
|
|
p->p_dupfd = 0;
|
|
vp = nd.ni_vp;
|
|
|
|
if (fp->f_data != (caddr_t) NULL) {
|
|
/*
|
|
* The fp data was changed, so it is a cloning operation
|
|
* Cleanup and return
|
|
*/
|
|
if (flags & FWRITE)
|
|
vp->v_writecount--;
|
|
vput(vp);
|
|
*retval = indx;
|
|
return (0);
|
|
}
|
|
|
|
fp->f_flag = flags & FMASK;
|
|
fp->f_type = DTYPE_VNODE;
|
|
fp->f_ops = &vnops;
|
|
fp->f_data = (caddr_t)vp;
|
|
if (flags & (O_EXLOCK | O_SHLOCK)) {
|
|
lf.l_whence = SEEK_SET;
|
|
lf.l_start = 0;
|
|
lf.l_len = 0;
|
|
if (flags & O_EXLOCK)
|
|
lf.l_type = F_WRLCK;
|
|
else
|
|
lf.l_type = F_RDLCK;
|
|
type = F_FLOCK;
|
|
if ((flags & FNONBLOCK) == 0)
|
|
type |= F_WAIT;
|
|
VOP_UNLOCK(vp);
|
|
if (error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type)) {
|
|
(void) vn_close(vp, fp->f_flag, fp->f_cred, p);
|
|
ffree(fp);
|
|
fdp->fd_ofiles[indx] = NULL;
|
|
return (error);
|
|
}
|
|
VOP_LOCK(vp);
|
|
fp->f_flag |= FHASLOCK;
|
|
}
|
|
VOP_UNLOCK(vp);
|
|
*retval = indx;
|
|
return (0);
|
|
}
|
|
|
|
#ifdef COMPAT_43
|
|
/*
|
|
* Create a file.
|
|
*/
|
|
compat_43_creat(p, uap, retval)
|
|
struct proc *p;
|
|
register struct compat_43_creat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct open_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
syscallarg(int) mode;
|
|
} */ openuap;
|
|
|
|
SCARG(&openuap, path) = SCARG(uap, path);
|
|
SCARG(&openuap, mode) = SCARG(uap, mode);
|
|
SCARG(&openuap, flags) = O_WRONLY | O_CREAT | O_TRUNC;
|
|
return (open(p, &openuap, retval));
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
/*
|
|
* Create a special file.
|
|
*/
|
|
/* ARGSUSED */
|
|
mknod(p, uap, retval)
|
|
struct proc *p;
|
|
register struct mknod_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
syscallarg(int) dev;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
if (error = suser(p->p_ucred, &p->p_acflag))
|
|
return (error);
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp != NULL) {
|
|
error = EEXIST;
|
|
goto bad;
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_fd->fd_cmask;
|
|
vattr.va_rdev = SCARG(uap, dev);
|
|
|
|
switch (SCARG(uap, mode) & S_IFMT) {
|
|
case S_IFMT: /* used by badsect to flag bad sectors */
|
|
vattr.va_type = VBAD;
|
|
break;
|
|
case S_IFCHR:
|
|
vattr.va_type = VCHR;
|
|
break;
|
|
case S_IFBLK:
|
|
vattr.va_type = VBLK;
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
goto bad;
|
|
}
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
return (VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr));
|
|
bad:
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
if (vp)
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Create a named pipe.
|
|
*/
|
|
/* ARGSUSED */
|
|
mkfifo(p, uap, retval)
|
|
struct proc *p;
|
|
register struct mkfifo_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
#ifndef FIFO
|
|
return (EOPNOTSUPP);
|
|
#else
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
if (nd.ni_vp != NULL) {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(nd.ni_vp);
|
|
return (EEXIST);
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_type = VFIFO;
|
|
vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_fd->fd_cmask;
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
return (VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr));
|
|
#endif /* FIFO */
|
|
}
|
|
|
|
/*
|
|
* Make a hard file link.
|
|
*/
|
|
/* ARGSUSED */
|
|
link(p, uap, retval)
|
|
struct proc *p;
|
|
register struct link_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(char *) link;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type == VDIR &&
|
|
(error = suser(p->p_ucred, &p->p_acflag)))
|
|
goto bad1;
|
|
nd.ni_cnd.cn_nameiop = CREATE;
|
|
nd.ni_cnd.cn_flags = LOCKPARENT;
|
|
nd.ni_dirp = SCARG(uap, link);
|
|
if (error = namei(&nd))
|
|
goto bad1;
|
|
if (nd.ni_vp != NULL) {
|
|
error = EEXIST;
|
|
goto bad2;
|
|
}
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd);
|
|
vrele(vp);
|
|
return (error);
|
|
bad2:
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
if (nd.ni_vp)
|
|
vrele(nd.ni_vp);
|
|
bad1:
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a symbolic link.
|
|
*/
|
|
/* ARGSUSED */
|
|
symlink(p, uap, retval)
|
|
struct proc *p;
|
|
register struct symlink_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(char *) link;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct vattr vattr;
|
|
char *path;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
MALLOC(path, char *, MAXPATHLEN, M_NAMEI, M_WAITOK);
|
|
if (error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, (u_int*)0))
|
|
goto bad;
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, link), p);
|
|
if (error = namei(&nd))
|
|
goto bad;
|
|
if (nd.ni_vp) {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(nd.ni_vp);
|
|
error = EEXIST;
|
|
goto bad;
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = ACCESSPERMS &~ p->p_fd->fd_cmask;
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, path);
|
|
bad:
|
|
FREE(path, M_NAMEI);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Delete a name from the filesystem.
|
|
*/
|
|
/* ARGSUSED */
|
|
unlink(p, uap, retval)
|
|
struct proc *p;
|
|
struct unlink_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, DELETE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LOCK(vp);
|
|
|
|
if (vp->v_type == VDIR &&
|
|
(error = suser(p->p_ucred, &p->p_acflag)))
|
|
goto bad;
|
|
/*
|
|
* The root of a mounted filesystem cannot be deleted.
|
|
*/
|
|
if (vp->v_flag & VROOT) {
|
|
error = EBUSY;
|
|
goto bad;
|
|
}
|
|
(void)vnode_pager_uncache(vp);
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
return (VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd));
|
|
bad:
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Reposition read/write file offset.
|
|
*/
|
|
lseek(p, uap, retval)
|
|
struct proc *p;
|
|
register struct lseek_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) offset;
|
|
syscallarg(int) whence;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct ucred *cred = p->p_ucred;
|
|
register struct filedesc *fdp = p->p_fd;
|
|
register struct file *fp;
|
|
struct vattr vattr;
|
|
int error;
|
|
|
|
if ((u_int)SCARG(uap, fd) >= fdp->fd_nfiles ||
|
|
(fp = fdp->fd_ofiles[SCARG(uap, fd)]) == NULL)
|
|
return (EBADF);
|
|
if (fp->f_type != DTYPE_VNODE)
|
|
return (ESPIPE);
|
|
switch (SCARG(uap, whence)) {
|
|
case L_INCR:
|
|
fp->f_offset += SCARG(uap, offset);
|
|
break;
|
|
case L_XTND:
|
|
if (error =
|
|
VOP_GETATTR((struct vnode *)fp->f_data, &vattr, cred, p))
|
|
return (error);
|
|
fp->f_offset = SCARG(uap, offset) + vattr.va_size;
|
|
break;
|
|
case L_SET:
|
|
fp->f_offset = SCARG(uap, offset);
|
|
break;
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
*(off_t *)retval = fp->f_offset;
|
|
return (0);
|
|
}
|
|
|
|
#if defined(COMPAT_43) || defined(COMPAT_SUNOS) || defined(COMPAT_SVR4)
|
|
/*
|
|
* Reposition read/write file offset.
|
|
*/
|
|
compat_43_lseek(p, uap, retval)
|
|
struct proc *p;
|
|
register struct compat_43_lseek_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(long) offset;
|
|
syscallarg(int) whence;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct lseek_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) offset;
|
|
syscallarg(int) whence;
|
|
} */ nuap;
|
|
off_t qret;
|
|
int error;
|
|
|
|
SCARG(&nuap, fd) = SCARG(uap, fd);
|
|
SCARG(&nuap, offset) = SCARG(uap, offset);
|
|
SCARG(&nuap, whence) = SCARG(uap, whence);
|
|
error = lseek(p, &nuap, &qret);
|
|
*(long *)retval = qret;
|
|
return (error);
|
|
}
|
|
#endif /* COMPAT_43 || COMPAT_SUNOS */
|
|
|
|
/*
|
|
* Check access permissions.
|
|
*/
|
|
access(p, uap, retval)
|
|
struct proc *p;
|
|
register struct access_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct ucred *cred = p->p_ucred;
|
|
register struct vnode *vp;
|
|
int error, flags, t_gid, t_uid;
|
|
struct nameidata nd;
|
|
|
|
t_uid = cred->cr_uid;
|
|
t_gid = cred->cr_groups[0];
|
|
cred->cr_uid = p->p_cred->p_ruid;
|
|
cred->cr_groups[0] = p->p_cred->p_rgid;
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
goto out1;
|
|
vp = nd.ni_vp;
|
|
|
|
/* Flags == 0 means only check for existence. */
|
|
if (SCARG(uap, flags)) {
|
|
flags = 0;
|
|
if (SCARG(uap, flags) & R_OK)
|
|
flags |= VREAD;
|
|
if (SCARG(uap, flags) & W_OK)
|
|
flags |= VWRITE;
|
|
if (SCARG(uap, flags) & X_OK)
|
|
flags |= VEXEC;
|
|
if ((flags & VWRITE) == 0 || (error = vn_writechk(vp)) == 0)
|
|
error = VOP_ACCESS(vp, flags, cred, p);
|
|
}
|
|
vput(vp);
|
|
out1:
|
|
cred->cr_uid = t_uid;
|
|
cred->cr_groups[0] = t_gid;
|
|
return (error);
|
|
}
|
|
|
|
#if defined(COMPAT_43) || defined(COMPAT_SUNOS) || defined(COMPAT_IBCS2)
|
|
/*
|
|
* Get file status; this version follows links.
|
|
*/
|
|
/* ARGSUSED */
|
|
compat_43_stat(p, uap, retval)
|
|
struct proc *p;
|
|
register struct compat_43_stat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct ostat *) ub;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct stat sb;
|
|
struct ostat osb;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
error = vn_stat(nd.ni_vp, &sb, p);
|
|
vput(nd.ni_vp);
|
|
if (error)
|
|
return (error);
|
|
cvtstat(&sb, &osb);
|
|
error = copyout((caddr_t)&osb, (caddr_t)SCARG(uap, ub), sizeof (osb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get file status; this version does not follow links.
|
|
*/
|
|
/* ARGSUSED */
|
|
compat_43_lstat(p, uap, retval)
|
|
struct proc *p;
|
|
register struct compat_43_lstat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct ostat *) ub;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct stat sb;
|
|
struct ostat osb;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
error = vn_stat(nd.ni_vp, &sb, p);
|
|
vput(nd.ni_vp);
|
|
if (error)
|
|
return (error);
|
|
cvtstat(&sb, &osb);
|
|
error = copyout((caddr_t)&osb, (caddr_t)SCARG(uap, ub), sizeof (osb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Convert from an old to a new stat structure.
|
|
*/
|
|
cvtstat(st, ost)
|
|
struct stat *st;
|
|
struct ostat *ost;
|
|
{
|
|
|
|
ost->st_dev = st->st_dev;
|
|
ost->st_ino = st->st_ino;
|
|
ost->st_mode = st->st_mode;
|
|
ost->st_nlink = st->st_nlink;
|
|
ost->st_uid = st->st_uid;
|
|
ost->st_gid = st->st_gid;
|
|
ost->st_rdev = st->st_rdev;
|
|
if (st->st_size < (quad_t)1 << 32)
|
|
ost->st_size = st->st_size;
|
|
else
|
|
ost->st_size = -2;
|
|
ost->st_atime = st->st_atime;
|
|
ost->st_mtime = st->st_mtime;
|
|
ost->st_ctime = st->st_ctime;
|
|
ost->st_blksize = st->st_blksize;
|
|
ost->st_blocks = st->st_blocks;
|
|
ost->st_flags = st->st_flags;
|
|
ost->st_gen = st->st_gen;
|
|
}
|
|
#endif /* COMPAT_43 || COMPAT_SUNOS || COMPAT_IBCS2 */
|
|
|
|
/*
|
|
* Get file status; this version follows links.
|
|
*/
|
|
/* ARGSUSED */
|
|
stat(p, uap, retval)
|
|
struct proc *p;
|
|
register struct stat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct stat *) ub;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct stat sb;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
error = vn_stat(nd.ni_vp, &sb, p);
|
|
vput(nd.ni_vp);
|
|
if (error)
|
|
return (error);
|
|
error = copyout((caddr_t)&sb, (caddr_t)SCARG(uap, ub), sizeof (sb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get file status; this version does not follow links.
|
|
*/
|
|
/* ARGSUSED */
|
|
lstat(p, uap, retval)
|
|
struct proc *p;
|
|
register struct lstat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct stat *) ub;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
int error;
|
|
struct vnode *vp, *dvp;
|
|
struct stat sb, sb1;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | LOCKPARENT, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
/*
|
|
* For symbolic links, always return the attributes of its
|
|
* containing directory, except for mode, size, and links.
|
|
*/
|
|
vp = nd.ni_vp;
|
|
dvp = nd.ni_dvp;
|
|
if (vp->v_type != VLNK) {
|
|
if (dvp == vp)
|
|
vrele(dvp);
|
|
else
|
|
vput(dvp);
|
|
error = vn_stat(vp, &sb, p);
|
|
vput(vp);
|
|
if (error)
|
|
return (error);
|
|
} else {
|
|
error = vn_stat(dvp, &sb, p);
|
|
vput(dvp);
|
|
if (error) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
error = vn_stat(vp, &sb1, p);
|
|
vput(vp);
|
|
if (error)
|
|
return (error);
|
|
sb.st_mode &= ~S_IFDIR;
|
|
sb.st_mode |= S_IFLNK;
|
|
sb.st_nlink = sb1.st_nlink;
|
|
sb.st_size = sb1.st_size;
|
|
sb.st_blocks = sb1.st_blocks;
|
|
}
|
|
error = copyout((caddr_t)&sb, (caddr_t)SCARG(uap, ub), sizeof (sb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get configurable pathname variables.
|
|
*/
|
|
/* ARGSUSED */
|
|
pathconf(p, uap, retval)
|
|
struct proc *p;
|
|
register struct pathconf_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) name;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
error = VOP_PATHCONF(nd.ni_vp, SCARG(uap, name), retval);
|
|
vput(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Return target name of a symbolic link.
|
|
*/
|
|
/* ARGSUSED */
|
|
readlink(p, uap, retval)
|
|
struct proc *p;
|
|
register struct readlink_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(char *) buf;
|
|
syscallarg(int) count;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct iovec aiov;
|
|
struct uio auio;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type != VLNK)
|
|
error = EINVAL;
|
|
else {
|
|
aiov.iov_base = SCARG(uap, buf);
|
|
aiov.iov_len = SCARG(uap, count);
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_offset = 0;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_procp = p;
|
|
auio.uio_resid = SCARG(uap, count);
|
|
error = VOP_READLINK(vp, &auio, p->p_ucred);
|
|
}
|
|
vput(vp);
|
|
*retval = SCARG(uap, count) - auio.uio_resid;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change flags of a file given a path name.
|
|
*/
|
|
/* ARGSUSED */
|
|
chflags(p, uap, retval)
|
|
struct proc *p;
|
|
register struct chflags_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LOCK(vp);
|
|
if (vp->v_mount->mnt_flag & MNT_RDONLY)
|
|
error = EROFS;
|
|
else {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_flags = SCARG(uap, flags);
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
}
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change flags of a file given a file descriptor.
|
|
*/
|
|
/* ARGSUSED */
|
|
fchflags(p, uap, retval)
|
|
struct proc *p;
|
|
register struct fchflags_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct vattr vattr;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LOCK(vp);
|
|
if (vp->v_mount->mnt_flag & MNT_RDONLY)
|
|
error = EROFS;
|
|
else {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_flags = SCARG(uap, flags);
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
}
|
|
VOP_UNLOCK(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change mode of a file given path name.
|
|
*/
|
|
/* ARGSUSED */
|
|
chmod(p, uap, retval)
|
|
struct proc *p;
|
|
register struct chmod_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LOCK(vp);
|
|
if (vp->v_mount->mnt_flag & MNT_RDONLY)
|
|
error = EROFS;
|
|
else {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = SCARG(uap, mode) & ALLPERMS;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
}
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change mode of a file given a file descriptor.
|
|
*/
|
|
/* ARGSUSED */
|
|
fchmod(p, uap, retval)
|
|
struct proc *p;
|
|
register struct fchmod_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct vattr vattr;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LOCK(vp);
|
|
if (vp->v_mount->mnt_flag & MNT_RDONLY)
|
|
error = EROFS;
|
|
else {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = SCARG(uap, mode) & ALLPERMS;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
}
|
|
VOP_UNLOCK(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a path name.
|
|
*/
|
|
/* ARGSUSED */
|
|
chown(p, uap, retval)
|
|
struct proc *p;
|
|
register struct chown_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) uid;
|
|
syscallarg(int) gid;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LOCK(vp);
|
|
if (vp->v_mount->mnt_flag & MNT_RDONLY)
|
|
error = EROFS;
|
|
else {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_uid = SCARG(uap, uid);
|
|
vattr.va_gid = SCARG(uap, gid);
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
}
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a file descriptor.
|
|
*/
|
|
/* ARGSUSED */
|
|
fchown(p, uap, retval)
|
|
struct proc *p;
|
|
register struct fchown_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) uid;
|
|
syscallarg(int) gid;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct vattr vattr;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LOCK(vp);
|
|
if (vp->v_mount->mnt_flag & MNT_RDONLY)
|
|
error = EROFS;
|
|
else {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_uid = SCARG(uap, uid);
|
|
vattr.va_gid = SCARG(uap, gid);
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
}
|
|
VOP_UNLOCK(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the access and modification times of a file.
|
|
*/
|
|
/* ARGSUSED */
|
|
utimes(p, uap, retval)
|
|
struct proc *p;
|
|
register struct utimes_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct timeval *) tptr;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct timeval tv[2];
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
VATTR_NULL(&vattr);
|
|
if (SCARG(uap, tptr) == NULL) {
|
|
microtime(&tv[0]);
|
|
tv[1] = tv[0];
|
|
vattr.va_vaflags |= VA_UTIMES_NULL;
|
|
} else if (error = copyin((caddr_t)SCARG(uap, tptr), (caddr_t)tv,
|
|
sizeof (tv)))
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LOCK(vp);
|
|
if (vp->v_mount->mnt_flag & MNT_RDONLY)
|
|
error = EROFS;
|
|
else {
|
|
vattr.va_atime.ts_sec = tv[0].tv_sec;
|
|
vattr.va_atime.ts_nsec = tv[0].tv_usec * 1000;
|
|
vattr.va_mtime.ts_sec = tv[1].tv_sec;
|
|
vattr.va_mtime.ts_nsec = tv[1].tv_usec * 1000;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
}
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Truncate a file given its path name.
|
|
*/
|
|
/* ARGSUSED */
|
|
truncate(p, uap, retval)
|
|
struct proc *p;
|
|
register struct truncate_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) length;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LOCK(vp);
|
|
if (vp->v_type == VDIR)
|
|
error = EISDIR;
|
|
else if ((error = vn_writechk(vp)) == 0 &&
|
|
(error = VOP_ACCESS(vp, VWRITE, p->p_ucred, p)) == 0) {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_size = SCARG(uap, length);
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
}
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Truncate a file given a file descriptor.
|
|
*/
|
|
/* ARGSUSED */
|
|
ftruncate(p, uap, retval)
|
|
struct proc *p;
|
|
register struct ftruncate_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) length;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct vattr vattr;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
|
|
return (error);
|
|
if ((fp->f_flag & FWRITE) == 0)
|
|
return (EINVAL);
|
|
vp = (struct vnode *)fp->f_data;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LOCK(vp);
|
|
if (vp->v_type == VDIR)
|
|
error = EISDIR;
|
|
else if ((error = vn_writechk(vp)) == 0) {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_size = SCARG(uap, length);
|
|
error = VOP_SETATTR(vp, &vattr, fp->f_cred, p);
|
|
}
|
|
VOP_UNLOCK(vp);
|
|
return (error);
|
|
}
|
|
|
|
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
|
|
/*
|
|
* Truncate a file given its path name.
|
|
*/
|
|
/* ARGSUSED */
|
|
compat_43_truncate(p, uap, retval)
|
|
struct proc *p;
|
|
register struct compat_43_truncate_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(long) length;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct truncate_args nuap;
|
|
|
|
SCARG(&nuap, path) = SCARG(uap, path);
|
|
SCARG(&nuap, length) = SCARG(uap, length);
|
|
return (truncate(p, &nuap, retval));
|
|
}
|
|
|
|
/*
|
|
* Truncate a file given a file descriptor.
|
|
*/
|
|
/* ARGSUSED */
|
|
compat_43_ftruncate(p, uap, retval)
|
|
struct proc *p;
|
|
register struct compat_43_ftruncate_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(long) length;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
struct ftruncate_args nuap;
|
|
|
|
SCARG(&nuap, fd) = SCARG(uap, fd);
|
|
SCARG(&nuap, length) = SCARG(uap, length);
|
|
return (ftruncate(p, &nuap, retval));
|
|
}
|
|
#endif /* COMPAT_43 || COMPAT_SUNOS */
|
|
|
|
/*
|
|
* Sync an open file.
|
|
*/
|
|
/* ARGSUSED */
|
|
fsync(p, uap, retval)
|
|
struct proc *p;
|
|
struct fsync_args /* {
|
|
syscallarg(int) fd;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
VOP_LOCK(vp);
|
|
error = VOP_FSYNC(vp, fp->f_cred, MNT_WAIT, p);
|
|
VOP_UNLOCK(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Rename files. Source and destination must either both be directories,
|
|
* or both not be directories. If target is a directory, it must be empty.
|
|
*/
|
|
/* ARGSUSED */
|
|
rename(p, uap, retval)
|
|
struct proc *p;
|
|
register struct rename_args /* {
|
|
syscallarg(char *) from;
|
|
syscallarg(char *) to;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct vnode *tvp, *fvp, *tdvp;
|
|
struct nameidata fromnd, tond;
|
|
int error;
|
|
|
|
NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE,
|
|
SCARG(uap, from), p);
|
|
if (error = namei(&fromnd))
|
|
return (error);
|
|
fvp = fromnd.ni_vp;
|
|
NDINIT(&tond, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART,
|
|
UIO_USERSPACE, SCARG(uap, to), p);
|
|
if (error = namei(&tond)) {
|
|
VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
|
|
vrele(fromnd.ni_dvp);
|
|
vrele(fvp);
|
|
goto out1;
|
|
}
|
|
tdvp = tond.ni_dvp;
|
|
tvp = tond.ni_vp;
|
|
if (tvp != NULL) {
|
|
if (fvp->v_type == VDIR && tvp->v_type != VDIR) {
|
|
error = ENOTDIR;
|
|
goto out;
|
|
} else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {
|
|
error = EISDIR;
|
|
goto out;
|
|
}
|
|
}
|
|
if (fvp == tdvp)
|
|
error = EINVAL;
|
|
/*
|
|
* If source is the same as the destination (that is the
|
|
* same inode number with the same name in the same directory),
|
|
* then there is nothing to do.
|
|
*/
|
|
if (fvp == tvp && fromnd.ni_dvp == tdvp &&
|
|
fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen &&
|
|
!bcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr,
|
|
fromnd.ni_cnd.cn_namelen))
|
|
error = -1;
|
|
out:
|
|
if (!error) {
|
|
VOP_LEASE(tdvp, p, p->p_ucred, LEASE_WRITE);
|
|
if (fromnd.ni_dvp != tdvp)
|
|
VOP_LEASE(fromnd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
if (tvp)
|
|
VOP_LEASE(tvp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd,
|
|
tond.ni_dvp, tond.ni_vp, &tond.ni_cnd);
|
|
} else {
|
|
VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd);
|
|
if (tdvp == tvp)
|
|
vrele(tdvp);
|
|
else
|
|
vput(tdvp);
|
|
if (tvp)
|
|
vput(tvp);
|
|
VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
|
|
vrele(fromnd.ni_dvp);
|
|
vrele(fvp);
|
|
}
|
|
vrele(tond.ni_startdir);
|
|
FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI);
|
|
out1:
|
|
if (fromnd.ni_startdir)
|
|
vrele(fromnd.ni_startdir);
|
|
FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI);
|
|
if (error == -1)
|
|
return (0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a directory file.
|
|
*/
|
|
/* ARGSUSED */
|
|
mkdir(p, uap, retval)
|
|
struct proc *p;
|
|
register struct mkdir_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp != NULL) {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(vp);
|
|
return (EEXIST);
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_type = VDIR;
|
|
vattr.va_mode = (SCARG(uap, mode) & ACCESSPERMS) &~ p->p_fd->fd_cmask;
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
|
|
if (!error)
|
|
vput(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Remove a directory file.
|
|
*/
|
|
/* ARGSUSED */
|
|
rmdir(p, uap, retval)
|
|
struct proc *p;
|
|
struct rmdir_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type != VDIR) {
|
|
error = ENOTDIR;
|
|
goto out;
|
|
}
|
|
/*
|
|
* No rmdir "." please.
|
|
*/
|
|
if (nd.ni_dvp == vp) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
/*
|
|
* The root of a mounted filesystem cannot be deleted.
|
|
*/
|
|
if (vp->v_flag & VROOT)
|
|
error = EBUSY;
|
|
out:
|
|
if (!error) {
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
|
|
} else {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vput(vp);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
#if defined(COMPAT_43) || defined(COMPAT_HPUX)
|
|
/*
|
|
* Read a block of directory entries in a file system independent format.
|
|
*/
|
|
compat_43_getdirentries(p, uap, retval)
|
|
struct proc *p;
|
|
register struct compat_43_getdirentries_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(char *) buf;
|
|
syscallarg(u_int) count;
|
|
syscallarg(long *) basep;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct file *fp;
|
|
struct uio auio, kuio;
|
|
struct iovec aiov, kiov;
|
|
struct dirent *dp, *edp;
|
|
caddr_t dirbuf;
|
|
int error, eofflag, readcnt;
|
|
long loff;
|
|
|
|
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
|
|
return (error);
|
|
if ((fp->f_flag & FREAD) == 0)
|
|
return (EBADF);
|
|
vp = (struct vnode *)fp->f_data;
|
|
unionread:
|
|
if (vp->v_type != VDIR)
|
|
return (EINVAL);
|
|
aiov.iov_base = SCARG(uap, buf);
|
|
aiov.iov_len = SCARG(uap, count);
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_procp = p;
|
|
auio.uio_resid = SCARG(uap, count);
|
|
VOP_LOCK(vp);
|
|
loff = auio.uio_offset = fp->f_offset;
|
|
# if (BYTE_ORDER != LITTLE_ENDIAN)
|
|
if (vp->v_mount->mnt_maxsymlinklen <= 0) {
|
|
error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag,
|
|
(u_long *)0, 0);
|
|
fp->f_offset = auio.uio_offset;
|
|
} else
|
|
# endif
|
|
{
|
|
kuio = auio;
|
|
kuio.uio_iov = &kiov;
|
|
kuio.uio_segflg = UIO_SYSSPACE;
|
|
kiov.iov_len = SCARG(uap, count);
|
|
MALLOC(dirbuf, caddr_t, SCARG(uap, count), M_TEMP, M_WAITOK);
|
|
kiov.iov_base = dirbuf;
|
|
error = VOP_READDIR(vp, &kuio, fp->f_cred, &eofflag,
|
|
(u_long *)0, 0);
|
|
fp->f_offset = kuio.uio_offset;
|
|
if (error == 0) {
|
|
readcnt = SCARG(uap, count) - kuio.uio_resid;
|
|
edp = (struct dirent *)&dirbuf[readcnt];
|
|
for (dp = (struct dirent *)dirbuf; dp < edp; ) {
|
|
# if (BYTE_ORDER == LITTLE_ENDIAN)
|
|
/*
|
|
* The expected low byte of
|
|
* dp->d_namlen is our dp->d_type.
|
|
* The high MBZ byte of dp->d_namlen
|
|
* is our dp->d_namlen.
|
|
*/
|
|
dp->d_type = dp->d_namlen;
|
|
dp->d_namlen = 0;
|
|
# else
|
|
/*
|
|
* The dp->d_type is the high byte
|
|
* of the expected dp->d_namlen,
|
|
* so must be zero'ed.
|
|
*/
|
|
dp->d_type = 0;
|
|
# endif
|
|
if (dp->d_reclen > 0) {
|
|
dp = (struct dirent *)
|
|
((char *)dp + dp->d_reclen);
|
|
} else {
|
|
error = EIO;
|
|
break;
|
|
}
|
|
}
|
|
if (dp >= edp)
|
|
error = uiomove(dirbuf, readcnt, &auio);
|
|
}
|
|
FREE(dirbuf, M_TEMP);
|
|
}
|
|
VOP_UNLOCK(vp);
|
|
if (error)
|
|
return (error);
|
|
|
|
#ifdef UNION
|
|
{
|
|
extern int (**union_vnodeop_p)();
|
|
extern struct vnode *union_lowervp __P((struct vnode *));
|
|
|
|
if ((SCARG(uap, count) == auio.uio_resid) &&
|
|
(vp->v_op == union_vnodeop_p)) {
|
|
struct vnode *lvp;
|
|
|
|
lvp = union_lowervp(vp);
|
|
if (lvp != NULLVP) {
|
|
VOP_LOCK(lvp);
|
|
error = VOP_OPEN(lvp, FREAD, fp->f_cred, p);
|
|
VOP_UNLOCK(lvp);
|
|
|
|
if (error) {
|
|
vrele(lvp);
|
|
return (error);
|
|
}
|
|
fp->f_data = (caddr_t) lvp;
|
|
fp->f_offset = 0;
|
|
error = vn_close(vp, FREAD, fp->f_cred, p);
|
|
if (error)
|
|
return (error);
|
|
vp = lvp;
|
|
goto unionread;
|
|
}
|
|
}
|
|
}
|
|
#endif /* UNION */
|
|
|
|
if ((SCARG(uap, count) == auio.uio_resid) &&
|
|
(vp->v_flag & VROOT) &&
|
|
(vp->v_mount->mnt_flag & MNT_UNION)) {
|
|
struct vnode *tvp = vp;
|
|
vp = vp->v_mount->mnt_vnodecovered;
|
|
VREF(vp);
|
|
fp->f_data = (caddr_t) vp;
|
|
fp->f_offset = 0;
|
|
vrele(tvp);
|
|
goto unionread;
|
|
}
|
|
error = copyout((caddr_t)&loff, (caddr_t)SCARG(uap, basep),
|
|
sizeof(long));
|
|
*retval = SCARG(uap, count) - auio.uio_resid;
|
|
return (error);
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
/*
|
|
* Read a block of directory entries in a file system independent format.
|
|
*/
|
|
getdirentries(p, uap, retval)
|
|
struct proc *p;
|
|
register struct getdirentries_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(char *) buf;
|
|
syscallarg(u_int) count;
|
|
syscallarg(long *) basep;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct file *fp;
|
|
struct uio auio;
|
|
struct iovec aiov;
|
|
long loff;
|
|
int error, eofflag;
|
|
|
|
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
|
|
return (error);
|
|
if ((fp->f_flag & FREAD) == 0)
|
|
return (EBADF);
|
|
vp = (struct vnode *)fp->f_data;
|
|
unionread:
|
|
if (vp->v_type != VDIR)
|
|
return (EINVAL);
|
|
aiov.iov_base = SCARG(uap, buf);
|
|
aiov.iov_len = SCARG(uap, count);
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_procp = p;
|
|
auio.uio_resid = SCARG(uap, count);
|
|
VOP_LOCK(vp);
|
|
loff = auio.uio_offset = fp->f_offset;
|
|
error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, (u_long *)0, 0);
|
|
fp->f_offset = auio.uio_offset;
|
|
VOP_UNLOCK(vp);
|
|
if (error)
|
|
return (error);
|
|
|
|
#ifdef UNION
|
|
{
|
|
extern int (**union_vnodeop_p)();
|
|
extern struct vnode *union_lowervp __P((struct vnode *));
|
|
|
|
if ((SCARG(uap, count) == auio.uio_resid) &&
|
|
(vp->v_op == union_vnodeop_p)) {
|
|
struct vnode *lvp;
|
|
|
|
lvp = union_lowervp(vp);
|
|
if (lvp != NULLVP) {
|
|
VOP_LOCK(lvp);
|
|
error = VOP_OPEN(lvp, FREAD, fp->f_cred, p);
|
|
VOP_UNLOCK(lvp);
|
|
|
|
if (error) {
|
|
vrele(lvp);
|
|
return (error);
|
|
}
|
|
fp->f_data = (caddr_t) lvp;
|
|
fp->f_offset = 0;
|
|
error = vn_close(vp, FREAD, fp->f_cred, p);
|
|
if (error)
|
|
return (error);
|
|
vp = lvp;
|
|
goto unionread;
|
|
}
|
|
}
|
|
}
|
|
#endif /* UNION */
|
|
|
|
if ((SCARG(uap, count) == auio.uio_resid) &&
|
|
(vp->v_flag & VROOT) &&
|
|
(vp->v_mount->mnt_flag & MNT_UNION)) {
|
|
struct vnode *tvp = vp;
|
|
vp = vp->v_mount->mnt_vnodecovered;
|
|
VREF(vp);
|
|
fp->f_data = (caddr_t) vp;
|
|
fp->f_offset = 0;
|
|
vrele(tvp);
|
|
goto unionread;
|
|
}
|
|
error = copyout((caddr_t)&loff, (caddr_t)SCARG(uap, basep),
|
|
sizeof(long));
|
|
*retval = SCARG(uap, count) - auio.uio_resid;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the mode mask for creation of filesystem nodes.
|
|
*/
|
|
mode_t /* XXX */
|
|
umask(p, uap, retval)
|
|
struct proc *p;
|
|
struct umask_args /* {
|
|
syscallarg(int) newmask;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct filedesc *fdp;
|
|
|
|
fdp = p->p_fd;
|
|
*retval = fdp->fd_cmask;
|
|
fdp->fd_cmask = SCARG(uap, newmask) & ALLPERMS;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Void all references to file by ripping underlying filesystem
|
|
* away from vnode.
|
|
*/
|
|
/* ARGSUSED */
|
|
revoke(p, uap, retval)
|
|
struct proc *p;
|
|
register struct revoke_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
register_t *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type != VCHR && vp->v_type != VBLK) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
if (error = VOP_GETATTR(vp, &vattr, p->p_ucred, p))
|
|
goto out;
|
|
if (p->p_ucred->cr_uid != vattr.va_uid &&
|
|
(error = suser(p->p_ucred, &p->p_acflag)))
|
|
goto out;
|
|
if (vp->v_usecount > 1 || (vp->v_flag & VALIASED))
|
|
vgoneall(vp);
|
|
out:
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Convert a user file descriptor to a kernel file entry.
|
|
*/
|
|
getvnode(fdp, fd, fpp)
|
|
struct filedesc *fdp;
|
|
struct file **fpp;
|
|
int fd;
|
|
{
|
|
struct file *fp;
|
|
|
|
if ((u_int)fd >= fdp->fd_nfiles ||
|
|
(fp = fdp->fd_ofiles[fd]) == NULL)
|
|
return (EBADF);
|
|
if (fp->f_type != DTYPE_VNODE)
|
|
return (EINVAL);
|
|
*fpp = fp;
|
|
return (0);
|
|
}
|