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75c1354190
This is a seriously beefed up chroot kind of thing. The process is jailed along the same lines as a chroot does it, but with additional tough restrictions imposed on what the superuser can do. For all I know, it is safe to hand over the root bit inside a prison to the customer living in that prison, this is what it was developed for in fact: "real virtual servers". Each prison has an ip number associated with it, which all IP communications will be coerced to use and each prison has its own hostname. Needless to say, you need more RAM this way, but the advantage is that each customer can run their own particular version of apache and not stomp on the toes of their neighbors. It generally does what one would expect, but setting up a jail still takes a little knowledge. A few notes: I have no scripts for setting up a jail, don't ask me for them. The IP number should be an alias on one of the interfaces. mount a /proc in each jail, it will make ps more useable. /proc/<pid>/status tells the hostname of the prison for jailed processes. Quotas are only sensible if you have a mountpoint per prison. There are no privisions for stopping resource-hogging. Some "#ifdef INET" and similar may be missing (send patches!) If somebody wants to take it from here and develop it into more of a "virtual machine" they should be most welcome! Tools, comments, patches & documentation most welcome. Have fun... Sponsored by: http://www.rndassociates.com/ Run for almost a year by: http://www.servetheweb.com/
3118 lines
67 KiB
C
3118 lines
67 KiB
C
/*
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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 8.13 (Berkeley) 4/15/94
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* $Id: vfs_syscalls.c,v 1.122 1999/04/27 11:16:25 phk Exp $
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*/
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/* For 4.3 integer FS ID compatibility */
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#include "opt_compat.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/buf.h>
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#include <sys/sysent.h>
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#include <sys/sysproto.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/fcntl.h>
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#include <sys/file.h>
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#include <sys/linker.h>
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#include <sys/stat.h>
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#include <sys/unistd.h>
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#include <sys/vnode.h>
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#include <sys/malloc.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/dirent.h>
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#include <miscfs/union/union.h>
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#include <vm/vm.h>
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#include <vm/vm_object.h>
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#include <vm/vm_extern.h>
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#include <vm/vm_zone.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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static void checkdirs __P((struct vnode *olddp));
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static int chroot_refuse_vdir_fds __P((struct filedesc *fdp));
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static int setfown __P((struct proc *, struct vnode *, uid_t, gid_t));
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static int setfmode __P((struct proc *, struct vnode *, int));
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static int setfflags __P((struct proc *, struct vnode *, int));
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static int setutimes __P((struct proc *, struct vnode *, struct timeval *, int));
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static int usermount = 0; /* if 1, non-root can mount fs. */
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int (*union_dircheckp) __P((struct proc *, struct vnode **, struct file *));
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SYSCTL_INT(_vfs, OID_AUTO, usermount, CTLFLAG_RW, &usermount, 0, "");
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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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#ifndef _SYS_SYSPROTO_H_
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struct mount_args {
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char *type;
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char *path;
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int flags;
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caddr_t data;
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};
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#endif
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/* ARGSUSED */
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int
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mount(p, uap)
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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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{
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struct vnode *vp;
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struct mount *mp;
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struct vfsconf *vfsp;
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int error, flag = 0, flag2 = 0;
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struct vattr va;
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#ifdef COMPAT_43
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u_long fstypenum;
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#endif
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struct nameidata nd;
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char fstypename[MFSNAMELEN];
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if (usermount == 0 && (error = suser(p)))
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return (error);
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/*
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* Do not allow NFS export by non-root users.
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*/
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if (SCARG(uap, flags) & MNT_EXPORTED) {
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error = suser(p);
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if (error)
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return (error);
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}
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/*
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* Silently enforce MNT_NOSUID and MNT_NODEV for non-root users
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*/
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if (suser_xxx(p->p_ucred, 0, 0))
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SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;
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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)) != 0)
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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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flag2 = mp->mnt_kern_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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/*
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* Only root, or the user that did the original mount is
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* permitted to update it.
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*/
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if (mp->mnt_stat.f_owner != p->p_ucred->cr_uid &&
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(error = suser(p))) {
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vput(vp);
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return (error);
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}
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if (vfs_busy(mp, LK_NOWAIT, 0, p)) {
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vput(vp);
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return (EBUSY);
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}
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VOP_UNLOCK(vp, 0, p);
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goto update;
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}
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/*
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* If the user is not root, ensure that they own the directory
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* onto which we are attempting to mount.
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*/
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if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)) ||
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(va.va_uid != p->p_ucred->cr_uid &&
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(error = suser(p)))) {
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vput(vp);
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return (error);
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}
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if ((error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 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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#ifdef COMPAT_43
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/*
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* Historically filesystem types were identified by number. If we
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* get an integer for the filesystem type instead of a string, we
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* check to see if it matches one of the historic filesystem types.
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*/
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fstypenum = (uintptr_t)SCARG(uap, type);
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if (fstypenum < maxvfsconf) {
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for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
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if (vfsp->vfc_typenum == fstypenum)
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break;
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if (vfsp == NULL) {
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vput(vp);
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return (ENODEV);
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}
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strncpy(fstypename, vfsp->vfc_name, MFSNAMELEN);
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} else
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#endif /* COMPAT_43 */
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if ((error = copyinstr(SCARG(uap, type), fstypename, MFSNAMELEN, NULL)) != 0) {
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vput(vp);
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return (error);
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}
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for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
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if (!strcmp(vfsp->vfc_name, fstypename))
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break;
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if (vfsp == NULL) {
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linker_file_t lf;
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/* Refuse to load modules if securelevel raised */
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if (securelevel > 0) {
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vput(vp);
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return EPERM;
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}
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/* Only load modules for root (very important!) */
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if ((error = suser(p)) != 0) {
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vput(vp);
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return error;
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}
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error = linker_load_file(fstypename, &lf);
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if (error || lf == NULL) {
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vput(vp);
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if (lf == NULL)
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error = ENODEV;
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return error;
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}
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lf->userrefs++;
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/* lookup again, see if the VFS was loaded */
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for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
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if (!strcmp(vfsp->vfc_name, fstypename))
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break;
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if (vfsp == NULL) {
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lf->userrefs--;
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linker_file_unload(lf);
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vput(vp);
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return (ENODEV);
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}
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}
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simple_lock(&vp->v_interlock);
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if ((vp->v_flag & VMOUNT) != 0 ||
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vp->v_mountedhere != NULL) {
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simple_unlock(&vp->v_interlock);
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vput(vp);
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return (EBUSY);
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}
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vp->v_flag |= VMOUNT;
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simple_unlock(&vp->v_interlock);
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/*
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* Allocate and initialize the filesystem.
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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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lockinit(&mp->mnt_lock, PVFS, "vfslock", 0, LK_NOPAUSE);
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(void)vfs_busy(mp, LK_NOWAIT, 0, p);
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mp->mnt_op = vfsp->vfc_vfsops;
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mp->mnt_vfc = vfsp;
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vfsp->vfc_refcount++;
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mp->mnt_stat.f_type = vfsp->vfc_typenum;
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mp->mnt_flag |= vfsp->vfc_flags & MNT_VISFLAGMASK;
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strncpy(mp->mnt_stat.f_fstypename, vfsp->vfc_name, MFSNAMELEN);
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mp->mnt_vnodecovered = vp;
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mp->mnt_stat.f_owner = p->p_ucred->cr_uid;
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VOP_UNLOCK(vp, 0, p);
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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_kern_flag |= MNTK_WANTRDWR;
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mp->mnt_flag &=~ (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |
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MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOATIME |
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MNT_NOSYMFOLLOW |
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MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR);
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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 | MNT_FORCE |
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MNT_NOSYMFOLLOW |
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MNT_NOATIME | MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR);
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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_kern_flag & MNTK_WANTRDWR)
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mp->mnt_flag &= ~MNT_RDONLY;
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mp->mnt_flag &=~ (MNT_UPDATE | MNT_RELOAD | MNT_FORCE);
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mp->mnt_kern_flag &=~ MNTK_WANTRDWR;
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if (error) {
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mp->mnt_flag = flag;
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mp->mnt_kern_flag = flag2;
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}
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if ((mp->mnt_flag & MNT_RDONLY) == 0) {
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if (mp->mnt_syncer == NULL)
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error = vfs_allocate_syncvnode(mp);
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} else {
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if (mp->mnt_syncer != NULL)
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vrele(mp->mnt_syncer);
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mp->mnt_syncer = NULL;
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}
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vfs_unbusy(mp, p);
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return (error);
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}
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vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
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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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simple_lock(&vp->v_interlock);
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vp->v_flag &= ~VMOUNT;
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vp->v_mountedhere = mp;
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simple_unlock(&vp->v_interlock);
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simple_lock(&mountlist_slock);
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CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
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simple_unlock(&mountlist_slock);
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checkdirs(vp);
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VOP_UNLOCK(vp, 0, p);
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if ((mp->mnt_flag & MNT_RDONLY) == 0)
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error = vfs_allocate_syncvnode(mp);
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vfs_unbusy(mp, p);
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if ((error = VFS_START(mp, 0, p)) != 0)
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vrele(vp);
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} else {
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simple_lock(&vp->v_interlock);
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vp->v_flag &= ~VMOUNT;
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simple_unlock(&vp->v_interlock);
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mp->mnt_vfc->vfc_refcount--;
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vfs_unbusy(mp, p);
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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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/*
|
|
* Scan all active processes to see if any of them have a current
|
|
* or root directory onto which the new filesystem has just been
|
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* mounted. If so, replace them with the new mount point.
|
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*/
|
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static void
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checkdirs(olddp)
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struct vnode *olddp;
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{
|
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struct filedesc *fdp;
|
|
struct vnode *newdp;
|
|
struct proc *p;
|
|
|
|
if (olddp->v_usecount == 1)
|
|
return;
|
|
if (VFS_ROOT(olddp->v_mountedhere, &newdp))
|
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panic("mount: lost mount");
|
|
for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
|
|
fdp = p->p_fd;
|
|
if (fdp->fd_cdir == olddp) {
|
|
vrele(fdp->fd_cdir);
|
|
VREF(newdp);
|
|
fdp->fd_cdir = newdp;
|
|
}
|
|
if (fdp->fd_rdir == olddp) {
|
|
vrele(fdp->fd_rdir);
|
|
VREF(newdp);
|
|
fdp->fd_rdir = newdp;
|
|
}
|
|
}
|
|
if (rootvnode == olddp) {
|
|
vrele(rootvnode);
|
|
VREF(newdp);
|
|
rootvnode = newdp;
|
|
}
|
|
vput(newdp);
|
|
}
|
|
|
|
/*
|
|
* Unmount a file system.
|
|
*
|
|
* Note: unmount takes a path to the vnode mounted on as argument,
|
|
* not special file (as before).
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct unmount_args {
|
|
char *path;
|
|
int flags;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
unmount(p, uap)
|
|
struct proc *p;
|
|
register struct unmount_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct mount *mp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
mp = vp->v_mount;
|
|
|
|
/*
|
|
* Only root, or the user that did the original mount is
|
|
* permitted to unmount this filesystem.
|
|
*/
|
|
if ((mp->mnt_stat.f_owner != p->p_ucred->cr_uid) &&
|
|
(error = suser(p))) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Don't allow unmounting the root file system.
|
|
*/
|
|
if (mp->mnt_flag & MNT_ROOTFS) {
|
|
vput(vp);
|
|
return (EINVAL);
|
|
}
|
|
|
|
/*
|
|
* Must be the root of the filesystem
|
|
*/
|
|
if ((vp->v_flag & VROOT) == 0) {
|
|
vput(vp);
|
|
return (EINVAL);
|
|
}
|
|
vput(vp);
|
|
return (dounmount(mp, SCARG(uap, flags), p));
|
|
}
|
|
|
|
/*
|
|
* Do the actual file system unmount.
|
|
*/
|
|
int
|
|
dounmount(mp, flags, p)
|
|
register struct mount *mp;
|
|
int flags;
|
|
struct proc *p;
|
|
{
|
|
struct vnode *coveredvp;
|
|
int error;
|
|
int async_flag;
|
|
|
|
simple_lock(&mountlist_slock);
|
|
mp->mnt_kern_flag |= MNTK_UNMOUNT;
|
|
lockmgr(&mp->mnt_lock, LK_DRAIN | LK_INTERLOCK, &mountlist_slock, p);
|
|
|
|
if (mp->mnt_flag & MNT_EXPUBLIC)
|
|
vfs_setpublicfs(NULL, NULL, NULL);
|
|
|
|
vfs_msync(mp, MNT_WAIT);
|
|
async_flag = mp->mnt_flag & MNT_ASYNC;
|
|
mp->mnt_flag &=~ MNT_ASYNC;
|
|
cache_purgevfs(mp); /* remove cache entries for this file sys */
|
|
if (mp->mnt_syncer != NULL)
|
|
vrele(mp->mnt_syncer);
|
|
if (((mp->mnt_flag & MNT_RDONLY) ||
|
|
(error = VFS_SYNC(mp, MNT_WAIT, p->p_ucred, p)) == 0) ||
|
|
(flags & MNT_FORCE))
|
|
error = VFS_UNMOUNT(mp, flags, p);
|
|
simple_lock(&mountlist_slock);
|
|
if (error) {
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0 && mp->mnt_syncer == NULL)
|
|
(void) vfs_allocate_syncvnode(mp);
|
|
mp->mnt_kern_flag &= ~MNTK_UNMOUNT;
|
|
mp->mnt_flag |= async_flag;
|
|
lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK | LK_REENABLE,
|
|
&mountlist_slock, p);
|
|
if (mp->mnt_kern_flag & MNTK_MWAIT)
|
|
wakeup((caddr_t)mp);
|
|
return (error);
|
|
}
|
|
CIRCLEQ_REMOVE(&mountlist, mp, mnt_list);
|
|
if ((coveredvp = mp->mnt_vnodecovered) != NULLVP) {
|
|
coveredvp->v_mountedhere = (struct mount *)0;
|
|
vrele(coveredvp);
|
|
}
|
|
mp->mnt_vfc->vfc_refcount--;
|
|
if (mp->mnt_vnodelist.lh_first != NULL)
|
|
panic("unmount: dangling vnode");
|
|
lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK, &mountlist_slock, p);
|
|
if (mp->mnt_kern_flag & MNTK_MWAIT)
|
|
wakeup((caddr_t)mp);
|
|
free((caddr_t)mp, M_MOUNT);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Sync each mounted filesystem.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct sync_args {
|
|
int dummy;
|
|
};
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
static int syncprt = 0;
|
|
SYSCTL_INT(_debug, OID_AUTO, syncprt, CTLFLAG_RW, &syncprt, 0, "");
|
|
#endif
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
sync(p, uap)
|
|
struct proc *p;
|
|
struct sync_args *uap;
|
|
{
|
|
register struct mount *mp, *nmp;
|
|
int asyncflag;
|
|
|
|
simple_lock(&mountlist_slock);
|
|
for (mp = mountlist.cqh_first; mp != (void *)&mountlist; mp = nmp) {
|
|
if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock, p)) {
|
|
nmp = mp->mnt_list.cqe_next;
|
|
continue;
|
|
}
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0) {
|
|
asyncflag = mp->mnt_flag & MNT_ASYNC;
|
|
mp->mnt_flag &= ~MNT_ASYNC;
|
|
vfs_msync(mp, MNT_NOWAIT);
|
|
VFS_SYNC(mp, MNT_NOWAIT,
|
|
((p != NULL) ? p->p_ucred : NOCRED), p);
|
|
mp->mnt_flag |= asyncflag;
|
|
}
|
|
simple_lock(&mountlist_slock);
|
|
nmp = mp->mnt_list.cqe_next;
|
|
vfs_unbusy(mp, p);
|
|
}
|
|
simple_unlock(&mountlist_slock);
|
|
#if 0
|
|
/*
|
|
* XXX don't call vfs_bufstats() yet because that routine
|
|
* was not imported in the Lite2 merge.
|
|
*/
|
|
#ifdef DIAGNOSTIC
|
|
if (syncprt)
|
|
vfs_bufstats();
|
|
#endif /* DIAGNOSTIC */
|
|
#endif
|
|
return (0);
|
|
}
|
|
|
|
/* XXX PRISON: could be per prison flag */
|
|
static int prison_quotas;
|
|
#if 0
|
|
SYSCTL_INT(_kern_prison, OID_AUTO, quotas, CTLFLAG_RW, &prison_quotas, 0, "");
|
|
#endif
|
|
|
|
/*
|
|
* Change filesystem quotas.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct quotactl_args {
|
|
char *path;
|
|
int cmd;
|
|
int uid;
|
|
caddr_t arg;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
quotactl(p, uap)
|
|
struct proc *p;
|
|
register struct quotactl_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) cmd;
|
|
syscallarg(int) uid;
|
|
syscallarg(caddr_t) arg;
|
|
} */ *uap;
|
|
{
|
|
register struct mount *mp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
if (p->p_prison && !prison_quotas)
|
|
return (EPERM);
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
mp = nd.ni_vp->v_mount;
|
|
vrele(nd.ni_vp);
|
|
return (VFS_QUOTACTL(mp, SCARG(uap, cmd), SCARG(uap, uid),
|
|
SCARG(uap, arg), p));
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct statfs_args {
|
|
char *path;
|
|
struct statfs *buf;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
statfs(p, uap)
|
|
struct proc *p;
|
|
register struct statfs_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct statfs *) buf;
|
|
} */ *uap;
|
|
{
|
|
register struct mount *mp;
|
|
register struct statfs *sp;
|
|
int error;
|
|
struct nameidata nd;
|
|
struct statfs sb;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
mp = nd.ni_vp->v_mount;
|
|
sp = &mp->mnt_stat;
|
|
vrele(nd.ni_vp);
|
|
error = VFS_STATFS(mp, sp, p);
|
|
if (error)
|
|
return (error);
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
if (suser_xxx(p->p_ucred, 0, 0)) {
|
|
bcopy((caddr_t)sp, (caddr_t)&sb, sizeof(sb));
|
|
sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;
|
|
sp = &sb;
|
|
}
|
|
return (copyout((caddr_t)sp, (caddr_t)SCARG(uap, buf), sizeof(*sp)));
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fstatfs_args {
|
|
int fd;
|
|
struct statfs *buf;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
fstatfs(p, uap)
|
|
struct proc *p;
|
|
register struct fstatfs_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(struct statfs *) buf;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
struct mount *mp;
|
|
register struct statfs *sp;
|
|
int error;
|
|
struct statfs sb;
|
|
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
mp = ((struct vnode *)fp->f_data)->v_mount;
|
|
sp = &mp->mnt_stat;
|
|
error = VFS_STATFS(mp, sp, p);
|
|
if (error)
|
|
return (error);
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
if (suser_xxx(p->p_ucred, 0, 0)) {
|
|
bcopy((caddr_t)sp, (caddr_t)&sb, sizeof(sb));
|
|
sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;
|
|
sp = &sb;
|
|
}
|
|
return (copyout((caddr_t)sp, (caddr_t)SCARG(uap, buf), sizeof(*sp)));
|
|
}
|
|
|
|
/*
|
|
* Get statistics on all filesystems.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct getfsstat_args {
|
|
struct statfs *buf;
|
|
long bufsize;
|
|
int flags;
|
|
};
|
|
#endif
|
|
int
|
|
getfsstat(p, uap)
|
|
struct proc *p;
|
|
register struct getfsstat_args /* {
|
|
syscallarg(struct statfs *) buf;
|
|
syscallarg(long) bufsize;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
{
|
|
register struct mount *mp, *nmp;
|
|
register struct statfs *sp;
|
|
caddr_t sfsp;
|
|
long count, maxcount, error;
|
|
|
|
maxcount = SCARG(uap, bufsize) / sizeof(struct statfs);
|
|
sfsp = (caddr_t)SCARG(uap, buf);
|
|
count = 0;
|
|
simple_lock(&mountlist_slock);
|
|
for (mp = mountlist.cqh_first; mp != (void *)&mountlist; mp = nmp) {
|
|
if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock, p)) {
|
|
nmp = mp->mnt_list.cqe_next;
|
|
continue;
|
|
}
|
|
if (sfsp && count < maxcount) {
|
|
sp = &mp->mnt_stat;
|
|
/*
|
|
* If MNT_NOWAIT or MNT_LAZY is specified, do not
|
|
* refresh the fsstat cache. MNT_NOWAIT or MNT_LAZY
|
|
* overrides MNT_WAIT.
|
|
*/
|
|
if (((SCARG(uap, flags) & (MNT_LAZY|MNT_NOWAIT)) == 0 ||
|
|
(SCARG(uap, flags) & MNT_WAIT)) &&
|
|
(error = VFS_STATFS(mp, sp, p))) {
|
|
simple_lock(&mountlist_slock);
|
|
nmp = mp->mnt_list.cqe_next;
|
|
vfs_unbusy(mp, p);
|
|
continue;
|
|
}
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
error = copyout((caddr_t)sp, sfsp, sizeof(*sp));
|
|
if (error) {
|
|
vfs_unbusy(mp, p);
|
|
return (error);
|
|
}
|
|
sfsp += sizeof(*sp);
|
|
}
|
|
count++;
|
|
simple_lock(&mountlist_slock);
|
|
nmp = mp->mnt_list.cqe_next;
|
|
vfs_unbusy(mp, p);
|
|
}
|
|
simple_unlock(&mountlist_slock);
|
|
if (sfsp && count > maxcount)
|
|
p->p_retval[0] = maxcount;
|
|
else
|
|
p->p_retval[0] = count;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Change current working directory to a given file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchdir_args {
|
|
int fd;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
fchdir(p, uap)
|
|
struct proc *p;
|
|
struct fchdir_args /* {
|
|
syscallarg(int) fd;
|
|
} */ *uap;
|
|
{
|
|
register struct filedesc *fdp = p->p_fd;
|
|
struct vnode *vp, *tdp;
|
|
struct mount *mp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
VREF(vp);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
if (vp->v_type != VDIR)
|
|
error = ENOTDIR;
|
|
else
|
|
error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);
|
|
while (!error && (mp = vp->v_mountedhere) != NULL) {
|
|
if (vfs_busy(mp, 0, 0, p))
|
|
continue;
|
|
error = VFS_ROOT(mp, &tdp);
|
|
vfs_unbusy(mp, p);
|
|
if (error)
|
|
break;
|
|
vput(vp);
|
|
vp = tdp;
|
|
}
|
|
if (error) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
VOP_UNLOCK(vp, 0, p);
|
|
vrele(fdp->fd_cdir);
|
|
fdp->fd_cdir = vp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Change current working directory (``.'').
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chdir_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
chdir(p, uap)
|
|
struct proc *p;
|
|
struct chdir_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
{
|
|
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)) != 0)
|
|
return (error);
|
|
vrele(fdp->fd_cdir);
|
|
fdp->fd_cdir = nd.ni_vp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Helper function for raised chroot(2) security function: Refuse if
|
|
* any filedescriptors are open directories.
|
|
*/
|
|
static int
|
|
chroot_refuse_vdir_fds(fdp)
|
|
struct filedesc *fdp;
|
|
{
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
int fd;
|
|
|
|
for (fd = 0; fd < fdp->fd_nfiles ; fd++) {
|
|
error = getvnode(fdp, fd, &fp);
|
|
if (error)
|
|
continue;
|
|
vp = (struct vnode *)fp->f_data;
|
|
if (vp->v_type != VDIR)
|
|
continue;
|
|
return(EPERM);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* This sysctl determines if we will allow a process to chroot(2) if it
|
|
* has a directory open:
|
|
* 0: disallowed for all processes.
|
|
* 1: allowed for processes that were not already chroot(2)'ed.
|
|
* 2: allowed for all processes.
|
|
*/
|
|
|
|
static int chroot_allow_open_directories = 1;
|
|
|
|
SYSCTL_INT(_kern, OID_AUTO, chroot_allow_open_directories, CTLFLAG_RW,
|
|
&chroot_allow_open_directories, 0, "");
|
|
|
|
/*
|
|
* Change notion of root (``/'') directory.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chroot_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
chroot(p, uap)
|
|
struct proc *p;
|
|
struct chroot_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
{
|
|
register struct filedesc *fdp = p->p_fd;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
error = suser_xxx(0, p, PRISON_ROOT);
|
|
if (error)
|
|
return (error);
|
|
if (chroot_allow_open_directories == 0 ||
|
|
(chroot_allow_open_directories == 1 && fdp->fd_rdir != rootvnode))
|
|
error = chroot_refuse_vdir_fds(fdp);
|
|
if (error)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = change_dir(&nd, p)) != 0)
|
|
return (error);
|
|
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;
|
|
|
|
error = namei(ndp);
|
|
if (error)
|
|
return (error);
|
|
vp = ndp->ni_vp;
|
|
if (vp->v_type != VDIR)
|
|
error = ENOTDIR;
|
|
else
|
|
error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);
|
|
if (error)
|
|
vput(vp);
|
|
else
|
|
VOP_UNLOCK(vp, 0, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check permissions, allocate an open file structure,
|
|
* and call the device open routine if any.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct open_args {
|
|
char *path;
|
|
int flags;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
open(p, uap)
|
|
struct proc *p;
|
|
register struct open_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
register struct filedesc *fdp = p->p_fd;
|
|
register struct file *fp;
|
|
register struct vnode *vp;
|
|
int cmode, flags, oflags;
|
|
struct file *nfp;
|
|
int type, indx, error;
|
|
struct flock lf;
|
|
struct nameidata nd;
|
|
|
|
oflags = SCARG(uap, flags);
|
|
if ((oflags & O_ACCMODE) == O_ACCMODE)
|
|
return (EINVAL);
|
|
flags = FFLAGS(oflags);
|
|
error = falloc(p, &nfp, &indx);
|
|
if (error)
|
|
return (error);
|
|
fp = nfp;
|
|
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 */
|
|
error = vn_open(&nd, flags, cmode);
|
|
if (error) {
|
|
ffree(fp);
|
|
if ((error == ENODEV || error == ENXIO) &&
|
|
p->p_dupfd >= 0 && /* XXX from fdopen */
|
|
(error =
|
|
dupfdopen(fdp, indx, p->p_dupfd, flags, error)) == 0) {
|
|
p->p_retval[0] = indx;
|
|
return (0);
|
|
}
|
|
if (error == ERESTART)
|
|
error = EINTR;
|
|
fdp->fd_ofiles[indx] = NULL;
|
|
return (error);
|
|
}
|
|
p->p_dupfd = 0;
|
|
vp = nd.ni_vp;
|
|
|
|
fp->f_flag = flags & FMASK;
|
|
fp->f_type = (vp->v_type == VFIFO ? DTYPE_FIFO : 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, 0, p);
|
|
if ((error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type)) != 0) {
|
|
(void) vn_close(vp, fp->f_flag, fp->f_cred, p);
|
|
ffree(fp);
|
|
fdp->fd_ofiles[indx] = NULL;
|
|
return (error);
|
|
}
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
fp->f_flag |= FHASLOCK;
|
|
}
|
|
if ((vp->v_type == VREG) && (vp->v_object == NULL))
|
|
vfs_object_create(vp, p, p->p_ucred);
|
|
VOP_UNLOCK(vp, 0, p);
|
|
p->p_retval[0] = indx;
|
|
return (0);
|
|
}
|
|
|
|
#ifdef COMPAT_43
|
|
/*
|
|
* Create a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ocreat_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
ocreat(p, uap)
|
|
struct proc *p;
|
|
register struct ocreat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
struct open_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
syscallarg(int) mode;
|
|
} */ nuap;
|
|
|
|
SCARG(&nuap, path) = SCARG(uap, path);
|
|
SCARG(&nuap, mode) = SCARG(uap, mode);
|
|
SCARG(&nuap, flags) = O_WRONLY | O_CREAT | O_TRUNC;
|
|
return (open(p, &nuap));
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
/*
|
|
* Create a special file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mknod_args {
|
|
char *path;
|
|
int mode;
|
|
int dev;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
mknod(p, uap)
|
|
struct proc *p;
|
|
register struct mknod_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
syscallarg(int) dev;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
int whiteout = 0;
|
|
struct nameidata nd;
|
|
|
|
switch (SCARG(uap, mode) & S_IFMT) {
|
|
case S_IFCHR:
|
|
case S_IFBLK:
|
|
error = suser(p);
|
|
break;
|
|
default:
|
|
error = suser_xxx(0, p, PRISON_ROOT);
|
|
break;
|
|
}
|
|
if (error)
|
|
return (error);
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp != NULL)
|
|
error = EEXIST;
|
|
else {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_fd->fd_cmask;
|
|
vattr.va_rdev = SCARG(uap, dev);
|
|
whiteout = 0;
|
|
|
|
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;
|
|
case S_IFWHT:
|
|
whiteout = 1;
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
}
|
|
if (!error) {
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
if (whiteout) {
|
|
error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, CREATE);
|
|
if (error)
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
vput(nd.ni_dvp);
|
|
} else {
|
|
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp,
|
|
&nd.ni_cnd, &vattr);
|
|
vput(nd.ni_dvp);
|
|
}
|
|
} else {
|
|
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);
|
|
}
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "mknod");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "mknod");
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Create a named pipe.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mkfifo_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
mkfifo(p, uap)
|
|
struct proc *p;
|
|
register struct mkfifo_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
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);
|
|
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
|
|
vput(nd.ni_dvp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a hard file link.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct link_args {
|
|
char *path;
|
|
char *link;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
link(p, uap)
|
|
struct proc *p;
|
|
register struct link_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(char *) link;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW|NOOBJ, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type == VDIR)
|
|
error = EPERM; /* POSIX */
|
|
else {
|
|
NDINIT(&nd, CREATE, LOCKPARENT|NOOBJ, UIO_USERSPACE, SCARG(uap, link), p);
|
|
error = namei(&nd);
|
|
if (!error) {
|
|
if (nd.ni_vp != NULL) {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_vp)
|
|
vrele(nd.ni_vp);
|
|
error = EEXIST;
|
|
} else {
|
|
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);
|
|
}
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
}
|
|
}
|
|
vrele(vp);
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "link");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "link");
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a symbolic link.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct symlink_args {
|
|
char *path;
|
|
char *link;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
symlink(p, uap)
|
|
struct proc *p;
|
|
register struct symlink_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(char *) link;
|
|
} */ *uap;
|
|
{
|
|
struct vattr vattr;
|
|
char *path;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
path = zalloc(namei_zone);
|
|
if ((error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, NULL)) != 0)
|
|
goto out;
|
|
NDINIT(&nd, CREATE, LOCKPARENT|NOOBJ, UIO_USERSPACE, SCARG(uap, link), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
goto out;
|
|
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 out;
|
|
}
|
|
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);
|
|
vput(nd.ni_dvp);
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "symlink");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "symlink");
|
|
out:
|
|
zfree(namei_zone, path);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Delete a whiteout from the filesystem.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
undelete(p, uap)
|
|
struct proc *p;
|
|
register struct undelete_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, DELETE, LOCKPARENT|DOWHITEOUT, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
|
|
if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & ISWHITEOUT)) {
|
|
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);
|
|
return (EEXIST);
|
|
}
|
|
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
if ((error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, DELETE)) != 0)
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
vput(nd.ni_dvp);
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "undelete");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "undelete");
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Delete a name from the filesystem.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct unlink_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
unlink(p, uap)
|
|
struct proc *p;
|
|
struct unlink_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, DELETE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
|
|
if (vp->v_type == VDIR)
|
|
error = EPERM; /* POSIX */
|
|
else {
|
|
/*
|
|
* The root of a mounted filesystem cannot be deleted.
|
|
*
|
|
* XXX: can this only be a VDIR case?
|
|
*/
|
|
if (vp->v_flag & VROOT)
|
|
error = EBUSY;
|
|
}
|
|
|
|
if (!error) {
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_REMOVE(nd.ni_dvp, 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);
|
|
if (vp != NULLVP)
|
|
vput(vp);
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "unlink");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "unlink");
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Reposition read/write file offset.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lseek_args {
|
|
int fd;
|
|
int pad;
|
|
off_t offset;
|
|
int whence;
|
|
};
|
|
#endif
|
|
int
|
|
lseek(p, uap)
|
|
struct proc *p;
|
|
register struct lseek_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) offset;
|
|
syscallarg(int) whence;
|
|
} */ *uap;
|
|
{
|
|
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:
|
|
error=VOP_GETATTR((struct vnode *)fp->f_data, &vattr, cred, p);
|
|
if (error)
|
|
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 *)(p->p_retval) = fp->f_offset;
|
|
return (0);
|
|
}
|
|
|
|
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
|
|
/*
|
|
* Reposition read/write file offset.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct olseek_args {
|
|
int fd;
|
|
long offset;
|
|
int whence;
|
|
};
|
|
#endif
|
|
int
|
|
olseek(p, uap)
|
|
struct proc *p;
|
|
register struct olseek_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(long) offset;
|
|
syscallarg(int) whence;
|
|
} */ *uap;
|
|
{
|
|
struct lseek_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) offset;
|
|
syscallarg(int) whence;
|
|
} */ nuap;
|
|
int error;
|
|
|
|
SCARG(&nuap, fd) = SCARG(uap, fd);
|
|
SCARG(&nuap, offset) = SCARG(uap, offset);
|
|
SCARG(&nuap, whence) = SCARG(uap, whence);
|
|
error = lseek(p, &nuap);
|
|
return (error);
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
/*
|
|
* Check access permissions.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct access_args {
|
|
char *path;
|
|
int flags;
|
|
};
|
|
#endif
|
|
int
|
|
access(p, uap)
|
|
struct proc *p;
|
|
register struct access_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
{
|
|
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 | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
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)
|
|
/*
|
|
* Get file status; this version follows links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ostat_args {
|
|
char *path;
|
|
struct ostat *ub;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
ostat(p, uap)
|
|
struct proc *p;
|
|
register struct ostat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct ostat *) ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
struct ostat osb;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
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.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct olstat_args {
|
|
char *path;
|
|
struct ostat *ub;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
olstat(p, uap)
|
|
struct proc *p;
|
|
register struct olstat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct ostat *) ub;
|
|
} */ *uap;
|
|
{
|
|
struct vnode *vp;
|
|
struct stat sb;
|
|
struct ostat osb;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
error = vn_stat(vp, &sb, p);
|
|
vput(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.
|
|
*/
|
|
void
|
|
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 */
|
|
|
|
/*
|
|
* Get file status; this version follows links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct stat_args {
|
|
char *path;
|
|
struct stat *ub;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
stat(p, uap)
|
|
struct proc *p;
|
|
register struct stat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct stat *) ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
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.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lstat_args {
|
|
char *path;
|
|
struct stat *ub;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
lstat(p, uap)
|
|
struct proc *p;
|
|
register struct lstat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct stat *) ub;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct vnode *vp;
|
|
struct stat sb;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
error = vn_stat(vp, &sb, p);
|
|
vput(vp);
|
|
if (error)
|
|
return (error);
|
|
error = copyout((caddr_t)&sb, (caddr_t)SCARG(uap, ub), sizeof (sb));
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
cvtnstat(sb, nsb)
|
|
struct stat *sb;
|
|
struct nstat *nsb;
|
|
{
|
|
nsb->st_dev = sb->st_dev;
|
|
nsb->st_ino = sb->st_ino;
|
|
nsb->st_mode = sb->st_mode;
|
|
nsb->st_nlink = sb->st_nlink;
|
|
nsb->st_uid = sb->st_uid;
|
|
nsb->st_gid = sb->st_gid;
|
|
nsb->st_rdev = sb->st_rdev;
|
|
nsb->st_atimespec = sb->st_atimespec;
|
|
nsb->st_mtimespec = sb->st_mtimespec;
|
|
nsb->st_ctimespec = sb->st_ctimespec;
|
|
nsb->st_size = sb->st_size;
|
|
nsb->st_blocks = sb->st_blocks;
|
|
nsb->st_blksize = sb->st_blksize;
|
|
nsb->st_flags = sb->st_flags;
|
|
nsb->st_gen = sb->st_gen;
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct nstat_args {
|
|
char *path;
|
|
struct nstat *ub;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
nstat(p, uap)
|
|
struct proc *p;
|
|
register struct nstat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct nstat *) ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
struct nstat nsb;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = vn_stat(nd.ni_vp, &sb, p);
|
|
vput(nd.ni_vp);
|
|
if (error)
|
|
return (error);
|
|
cvtnstat(&sb, &nsb);
|
|
error = copyout((caddr_t)&nsb, (caddr_t)SCARG(uap, ub), sizeof (nsb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get file status; this version does not follow links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lstat_args {
|
|
char *path;
|
|
struct stat *ub;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
nlstat(p, uap)
|
|
struct proc *p;
|
|
register struct nlstat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct nstat *) ub;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct vnode *vp;
|
|
struct stat sb;
|
|
struct nstat nsb;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
error = vn_stat(vp, &sb, p);
|
|
vput(vp);
|
|
if (error)
|
|
return (error);
|
|
cvtnstat(&sb, &nsb);
|
|
error = copyout((caddr_t)&nsb, (caddr_t)SCARG(uap, ub), sizeof (nsb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get configurable pathname variables.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct pathconf_args {
|
|
char *path;
|
|
int name;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
pathconf(p, uap)
|
|
struct proc *p;
|
|
register struct pathconf_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) name;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = VOP_PATHCONF(nd.ni_vp, SCARG(uap, name), p->p_retval);
|
|
vput(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Return target name of a symbolic link.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct readlink_args {
|
|
char *path;
|
|
char *buf;
|
|
int count;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
readlink(p, uap)
|
|
struct proc *p;
|
|
register struct readlink_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(char *) buf;
|
|
syscallarg(int) count;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct iovec aiov;
|
|
struct uio auio;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
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);
|
|
p->p_retval[0] = SCARG(uap, count) - auio.uio_resid;
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
setfflags(p, vp, flags)
|
|
struct proc *p;
|
|
struct vnode *vp;
|
|
int flags;
|
|
{
|
|
int error;
|
|
struct vattr vattr;
|
|
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_flags = flags;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
VOP_UNLOCK(vp, 0, p);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Change flags of a file given a path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chflags_args {
|
|
char *path;
|
|
int flags;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
chflags(p, uap)
|
|
struct proc *p;
|
|
register struct chflags_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = setfflags(p, nd.ni_vp, SCARG(uap, flags));
|
|
vrele(nd.ni_vp);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Change flags of a file given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchflags_args {
|
|
int fd;
|
|
int flags;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
fchflags(p, uap)
|
|
struct proc *p;
|
|
register struct fchflags_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
return setfflags(p, (struct vnode *) fp->f_data, SCARG(uap, flags));
|
|
}
|
|
|
|
static int
|
|
setfmode(p, vp, mode)
|
|
struct proc *p;
|
|
struct vnode *vp;
|
|
int mode;
|
|
{
|
|
int error;
|
|
struct vattr vattr;
|
|
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = mode & ALLPERMS;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
VOP_UNLOCK(vp, 0, p);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Change mode of a file given path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chmod_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
chmod(p, uap)
|
|
struct proc *p;
|
|
register struct chmod_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = setfmode(p, nd.ni_vp, SCARG(uap, mode));
|
|
vrele(nd.ni_vp);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Change mode of a file given path name (don't follow links.)
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lchmod_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
lchmod(p, uap)
|
|
struct proc *p;
|
|
register struct lchmod_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = setfmode(p, nd.ni_vp, SCARG(uap, mode));
|
|
vrele(nd.ni_vp);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Change mode of a file given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchmod_args {
|
|
int fd;
|
|
int mode;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
fchmod(p, uap)
|
|
struct proc *p;
|
|
register struct fchmod_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
return setfmode(p, (struct vnode *)fp->f_data, SCARG(uap, mode));
|
|
}
|
|
|
|
static int
|
|
setfown(p, vp, uid, gid)
|
|
struct proc *p;
|
|
struct vnode *vp;
|
|
uid_t uid;
|
|
gid_t gid;
|
|
{
|
|
int error;
|
|
struct vattr vattr;
|
|
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_uid = uid;
|
|
vattr.va_gid = gid;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
VOP_UNLOCK(vp, 0, p);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chown_args {
|
|
char *path;
|
|
int uid;
|
|
int gid;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
chown(p, uap)
|
|
struct proc *p;
|
|
register struct chown_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) uid;
|
|
syscallarg(int) gid;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = setfown(p, nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid));
|
|
vrele(nd.ni_vp);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a path name, do not cross symlinks.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lchown_args {
|
|
char *path;
|
|
int uid;
|
|
int gid;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
lchown(p, uap)
|
|
struct proc *p;
|
|
register struct lchown_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) uid;
|
|
syscallarg(int) gid;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = setfown(p, nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid));
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchown_args {
|
|
int fd;
|
|
int uid;
|
|
int gid;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
fchown(p, uap)
|
|
struct proc *p;
|
|
register struct fchown_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) uid;
|
|
syscallarg(int) gid;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
return setfown(p, (struct vnode *)fp->f_data,
|
|
SCARG(uap, uid), SCARG(uap, gid));
|
|
}
|
|
|
|
static int
|
|
setutimes(p, vp, tv, nullflag)
|
|
struct proc *p;
|
|
struct vnode *vp;
|
|
struct timeval *tv;
|
|
int nullflag;
|
|
{
|
|
int error;
|
|
struct vattr vattr;
|
|
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_atime.tv_sec = tv[0].tv_sec;
|
|
vattr.va_atime.tv_nsec = tv[0].tv_usec * 1000;
|
|
vattr.va_mtime.tv_sec = tv[1].tv_sec;
|
|
vattr.va_mtime.tv_nsec = tv[1].tv_usec * 1000;
|
|
if (nullflag)
|
|
vattr.va_vaflags |= VA_UTIMES_NULL;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
VOP_UNLOCK(vp, 0, p);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Set the access and modification times of a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct utimes_args {
|
|
char *path;
|
|
struct timeval *tptr;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
utimes(p, uap)
|
|
struct proc *p;
|
|
register struct utimes_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct timeval *) tptr;
|
|
} */ *uap;
|
|
{
|
|
struct timeval tv[2];
|
|
int error;
|
|
struct nameidata nd;
|
|
int nullflag;
|
|
|
|
nullflag = 0;
|
|
if (SCARG(uap, tptr) == NULL) {
|
|
microtime(&tv[0]);
|
|
tv[1] = tv[0];
|
|
nullflag = 1;
|
|
} else if ((error = copyin((caddr_t)SCARG(uap, tptr), (caddr_t)tv,
|
|
sizeof (tv))) != 0)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = setutimes(p, nd.ni_vp, tv, nullflag);
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the access and modification times of a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lutimes_args {
|
|
char *path;
|
|
struct timeval *tptr;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
lutimes(p, uap)
|
|
struct proc *p;
|
|
register struct lutimes_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct timeval *) tptr;
|
|
} */ *uap;
|
|
{
|
|
struct timeval tv[2];
|
|
int error;
|
|
struct nameidata nd;
|
|
int nullflag;
|
|
|
|
nullflag = 0;
|
|
if (SCARG(uap, tptr) == NULL) {
|
|
microtime(&tv[0]);
|
|
tv[1] = tv[0];
|
|
nullflag = 1;
|
|
} else if ((error = copyin((caddr_t)SCARG(uap, tptr), (caddr_t)tv,
|
|
sizeof (tv))) != 0)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
|
|
error = setutimes(p, nd.ni_vp, tv, nullflag);
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the access and modification times of a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct futimes_args {
|
|
int fd;
|
|
struct timeval *tptr;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
futimes(p, uap)
|
|
struct proc *p;
|
|
register struct futimes_args /* {
|
|
syscallarg(int ) fd;
|
|
syscallarg(struct timeval *) tptr;
|
|
} */ *uap;
|
|
{
|
|
struct timeval tv[2];
|
|
struct file *fp;
|
|
int error;
|
|
int nullflag;
|
|
|
|
nullflag = 0;
|
|
if (SCARG(uap, tptr) == NULL) {
|
|
microtime(&tv[0]);
|
|
tv[1] = tv[0];
|
|
nullflag = 1;
|
|
} else if ((error = copyin((caddr_t)SCARG(uap, tptr), (caddr_t)tv,
|
|
sizeof (tv))) != 0)
|
|
return (error);
|
|
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
return setutimes(p, (struct vnode *)fp->f_data, tv, nullflag);
|
|
}
|
|
|
|
/*
|
|
* Truncate a file given its path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct truncate_args {
|
|
char *path;
|
|
int pad;
|
|
off_t length;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
truncate(p, uap)
|
|
struct proc *p;
|
|
register struct truncate_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) length;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
if (uap->length < 0)
|
|
return(EINVAL);
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
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.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ftruncate_args {
|
|
int fd;
|
|
int pad;
|
|
off_t length;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
ftruncate(p, uap)
|
|
struct proc *p;
|
|
register struct ftruncate_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) length;
|
|
} */ *uap;
|
|
{
|
|
struct vattr vattr;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if (uap->length < 0)
|
|
return(EINVAL);
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
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);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
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, 0, p);
|
|
return (error);
|
|
}
|
|
|
|
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
|
|
/*
|
|
* Truncate a file given its path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct otruncate_args {
|
|
char *path;
|
|
long length;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
otruncate(p, uap)
|
|
struct proc *p;
|
|
register struct otruncate_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(long) length;
|
|
} */ *uap;
|
|
{
|
|
struct truncate_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) length;
|
|
} */ nuap;
|
|
|
|
SCARG(&nuap, path) = SCARG(uap, path);
|
|
SCARG(&nuap, length) = SCARG(uap, length);
|
|
return (truncate(p, &nuap));
|
|
}
|
|
|
|
/*
|
|
* Truncate a file given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct oftruncate_args {
|
|
int fd;
|
|
long length;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
oftruncate(p, uap)
|
|
struct proc *p;
|
|
register struct oftruncate_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(long) length;
|
|
} */ *uap;
|
|
{
|
|
struct ftruncate_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) length;
|
|
} */ nuap;
|
|
|
|
SCARG(&nuap, fd) = SCARG(uap, fd);
|
|
SCARG(&nuap, length) = SCARG(uap, length);
|
|
return (ftruncate(p, &nuap));
|
|
}
|
|
#endif /* COMPAT_43 || COMPAT_SUNOS */
|
|
|
|
/*
|
|
* Sync an open file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fsync_args {
|
|
int fd;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
fsync(p, uap)
|
|
struct proc *p;
|
|
struct fsync_args /* {
|
|
syscallarg(int) fd;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
if (vp->v_object)
|
|
vm_object_page_clean(vp->v_object, 0, 0, 0);
|
|
if ((error = VOP_FSYNC(vp, fp->f_cred, MNT_WAIT, p)) == 0 &&
|
|
vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP) &&
|
|
bioops.io_fsync)
|
|
error = (*bioops.io_fsync)(vp);
|
|
VOP_UNLOCK(vp, 0, p);
|
|
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.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct rename_args {
|
|
char *from;
|
|
char *to;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
rename(p, uap)
|
|
struct proc *p;
|
|
register struct rename_args /* {
|
|
syscallarg(char *) from;
|
|
syscallarg(char *) to;
|
|
} */ *uap;
|
|
{
|
|
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)) != 0)
|
|
return (error);
|
|
fvp = fromnd.ni_vp;
|
|
NDINIT(&tond, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART | NOOBJ,
|
|
UIO_USERSPACE, SCARG(uap, to), p);
|
|
if (fromnd.ni_vp->v_type == VDIR)
|
|
tond.ni_cnd.cn_flags |= WILLBEDIR;
|
|
if ((error = namei(&tond)) != 0) {
|
|
/* Translate error code for rename("dir1", "dir2/."). */
|
|
if (error == EISDIR && fvp->v_type == VDIR)
|
|
error = EINVAL;
|
|
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);
|
|
ASSERT_VOP_UNLOCKED(fromnd.ni_dvp, "rename");
|
|
ASSERT_VOP_UNLOCKED(fromnd.ni_vp, "rename");
|
|
ASSERT_VOP_UNLOCKED(tond.ni_dvp, "rename");
|
|
ASSERT_VOP_UNLOCKED(tond.ni_vp, "rename");
|
|
zfree(namei_zone, tond.ni_cnd.cn_pnbuf);
|
|
out1:
|
|
if (fromnd.ni_startdir)
|
|
vrele(fromnd.ni_startdir);
|
|
zfree(namei_zone, fromnd.ni_cnd.cn_pnbuf);
|
|
if (error == -1)
|
|
return (0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a directory file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mkdir_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
mkdir(p, uap)
|
|
struct proc *p;
|
|
register struct mkdir_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
|
|
nd.ni_cnd.cn_flags |= WILLBEDIR;
|
|
if ((error = namei(&nd)) != 0)
|
|
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);
|
|
vput(nd.ni_dvp);
|
|
if (!error)
|
|
vput(nd.ni_vp);
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "mkdir");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "mkdir");
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Remove a directory file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct rmdir_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
rmdir(p, uap)
|
|
struct proc *p;
|
|
struct rmdir_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
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);
|
|
if (vp != NULLVP)
|
|
vput(vp);
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "rmdir");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "rmdir");
|
|
return (error);
|
|
}
|
|
|
|
#ifdef COMPAT_43
|
|
/*
|
|
* Read a block of directory entries in a file system independent format.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ogetdirentries_args {
|
|
int fd;
|
|
char *buf;
|
|
u_int count;
|
|
long *basep;
|
|
};
|
|
#endif
|
|
int
|
|
ogetdirentries(p, uap)
|
|
struct proc *p;
|
|
register struct ogetdirentries_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(char *) buf;
|
|
syscallarg(u_int) count;
|
|
syscallarg(long *) basep;
|
|
} */ *uap;
|
|
{
|
|
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)) != 0)
|
|
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);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
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,
|
|
NULL, NULL);
|
|
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,
|
|
NULL, NULL);
|
|
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, 0, p);
|
|
if (error)
|
|
return (error);
|
|
if (SCARG(uap, count) == auio.uio_resid) {
|
|
if (union_dircheckp) {
|
|
error = union_dircheckp(p, &vp, fp);
|
|
if (error == -1)
|
|
goto unionread;
|
|
if (error)
|
|
return (error);
|
|
}
|
|
if ((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));
|
|
p->p_retval[0] = SCARG(uap, count) - auio.uio_resid;
|
|
return (error);
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
/*
|
|
* Read a block of directory entries in a file system independent format.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct getdirentries_args {
|
|
int fd;
|
|
char *buf;
|
|
u_int count;
|
|
long *basep;
|
|
};
|
|
#endif
|
|
int
|
|
getdirentries(p, uap)
|
|
struct proc *p;
|
|
register struct getdirentries_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(char *) buf;
|
|
syscallarg(u_int) count;
|
|
syscallarg(long *) basep;
|
|
} */ *uap;
|
|
{
|
|
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)) != 0)
|
|
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);
|
|
/* vn_lock(vp, LK_SHARED | LK_RETRY, p); */
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
loff = auio.uio_offset = fp->f_offset;
|
|
error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, NULL, NULL);
|
|
fp->f_offset = auio.uio_offset;
|
|
VOP_UNLOCK(vp, 0, p);
|
|
if (error)
|
|
return (error);
|
|
if (SCARG(uap, count) == auio.uio_resid) {
|
|
if (union_dircheckp) {
|
|
error = union_dircheckp(p, &vp, fp);
|
|
if (error == -1)
|
|
goto unionread;
|
|
if (error)
|
|
return (error);
|
|
}
|
|
if ((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;
|
|
}
|
|
}
|
|
if (SCARG(uap, basep) != NULL) {
|
|
error = copyout((caddr_t)&loff, (caddr_t)SCARG(uap, basep),
|
|
sizeof(long));
|
|
}
|
|
p->p_retval[0] = SCARG(uap, count) - auio.uio_resid;
|
|
return (error);
|
|
}
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct getdents_args {
|
|
int fd;
|
|
char *buf;
|
|
size_t count;
|
|
};
|
|
#endif
|
|
int
|
|
getdents(p, uap)
|
|
struct proc *p;
|
|
register struct getdents_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(char *) buf;
|
|
syscallarg(u_int) count;
|
|
} */ *uap;
|
|
{
|
|
struct getdirentries_args ap;
|
|
ap.fd = uap->fd;
|
|
ap.buf = uap->buf;
|
|
ap.count = uap->count;
|
|
ap.basep = NULL;
|
|
return getdirentries(p, &ap);
|
|
}
|
|
|
|
/*
|
|
* Set the mode mask for creation of filesystem nodes.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct umask_args {
|
|
int newmask;
|
|
};
|
|
#endif
|
|
int
|
|
umask(p, uap)
|
|
struct proc *p;
|
|
struct umask_args /* {
|
|
syscallarg(int) newmask;
|
|
} */ *uap;
|
|
{
|
|
register struct filedesc *fdp;
|
|
|
|
fdp = p->p_fd;
|
|
p->p_retval[0] = fdp->fd_cmask;
|
|
fdp->fd_cmask = SCARG(uap, newmask) & ALLPERMS;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Void all references to file by ripping underlying filesystem
|
|
* away from vnode.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct revoke_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
revoke(p, uap)
|
|
struct proc *p;
|
|
register struct revoke_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
{
|
|
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)) != 0)
|
|
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)) != 0)
|
|
goto out;
|
|
if (p->p_ucred->cr_uid != vattr.va_uid &&
|
|
(error = suser_xxx(0, p, PRISON_ROOT)))
|
|
goto out;
|
|
if (vp->v_usecount > 1 || (vp->v_flag & VALIASED))
|
|
VOP_REVOKE(vp, REVOKEALL);
|
|
out:
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Convert a user file descriptor to a kernel file entry.
|
|
*/
|
|
int
|
|
getvnode(fdp, fd, fpp)
|
|
struct filedesc *fdp;
|
|
int fd;
|
|
struct file **fpp;
|
|
{
|
|
struct file *fp;
|
|
|
|
if ((u_int)fd >= fdp->fd_nfiles ||
|
|
(fp = fdp->fd_ofiles[fd]) == NULL)
|
|
return (EBADF);
|
|
if (fp->f_type != DTYPE_VNODE && fp->f_type != DTYPE_FIFO)
|
|
return (EINVAL);
|
|
*fpp = fp;
|
|
return (0);
|
|
}
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct __getcwd_args {
|
|
u_char *buf;
|
|
u_int buflen;
|
|
};
|
|
#endif
|
|
|
|
SYSCTL_DECL(_vfs_cache);
|
|
#define STATNODE(mode, name, var) \
|
|
SYSCTL_INT(_vfs_cache, OID_AUTO, name, mode, var, 0, "");
|
|
|
|
static int disablecwd;
|
|
SYSCTL_INT(_debug, OID_AUTO, disablecwd, CTLFLAG_RW, &disablecwd, 0, "");
|
|
|
|
static u_long numcwdcalls; STATNODE(CTLFLAG_RD, numcwdcalls, &numcwdcalls);
|
|
static u_long numcwdfail1; STATNODE(CTLFLAG_RD, numcwdfail1, &numcwdfail1);
|
|
static u_long numcwdfail2; STATNODE(CTLFLAG_RD, numcwdfail2, &numcwdfail2);
|
|
static u_long numcwdfail3; STATNODE(CTLFLAG_RD, numcwdfail3, &numcwdfail3);
|
|
static u_long numcwdfail4; STATNODE(CTLFLAG_RD, numcwdfail4, &numcwdfail4);
|
|
static u_long numcwdfound; STATNODE(CTLFLAG_RD, numcwdfound, &numcwdfound);
|
|
int
|
|
__getcwd(p, uap)
|
|
struct proc *p;
|
|
struct __getcwd_args *uap;
|
|
{
|
|
char *bp, *buf;
|
|
int error, i, slash_prefixed;
|
|
struct filedesc *fdp;
|
|
struct namecache *ncp;
|
|
struct vnode *vp;
|
|
|
|
numcwdcalls++;
|
|
if (disablecwd)
|
|
return (ENODEV);
|
|
if (uap->buflen < 2)
|
|
return (EINVAL);
|
|
if (uap->buflen > MAXPATHLEN)
|
|
uap->buflen = MAXPATHLEN;
|
|
buf = bp = malloc(uap->buflen, M_TEMP, M_WAITOK);
|
|
bp += uap->buflen - 1;
|
|
*bp = '\0';
|
|
fdp = p->p_fd;
|
|
slash_prefixed = 0;
|
|
for (vp = fdp->fd_cdir; vp != fdp->fd_rdir && vp != rootvnode;) {
|
|
if (vp->v_flag & VROOT) {
|
|
vp = vp->v_mount->mnt_vnodecovered;
|
|
continue;
|
|
}
|
|
if (vp->v_dd->v_id != vp->v_ddid) {
|
|
numcwdfail1++;
|
|
free(buf, M_TEMP);
|
|
return (ENOTDIR);
|
|
}
|
|
ncp = TAILQ_FIRST(&vp->v_cache_dst);
|
|
if (!ncp) {
|
|
numcwdfail2++;
|
|
free(buf, M_TEMP);
|
|
return (ENOENT);
|
|
}
|
|
if (ncp->nc_dvp != vp->v_dd) {
|
|
numcwdfail3++;
|
|
free(buf, M_TEMP);
|
|
return (EBADF);
|
|
}
|
|
for (i = ncp->nc_nlen - 1; i >= 0; i--) {
|
|
if (bp == buf) {
|
|
numcwdfail4++;
|
|
free(buf, M_TEMP);
|
|
return (ENOMEM);
|
|
}
|
|
*--bp = ncp->nc_name[i];
|
|
}
|
|
if (bp == buf) {
|
|
numcwdfail4++;
|
|
free(buf, M_TEMP);
|
|
return (ENOMEM);
|
|
}
|
|
*--bp = '/';
|
|
slash_prefixed = 1;
|
|
vp = vp->v_dd;
|
|
}
|
|
if (!slash_prefixed) {
|
|
if (bp == buf) {
|
|
numcwdfail4++;
|
|
free(buf, M_TEMP);
|
|
return (ENOMEM);
|
|
}
|
|
*--bp = '/';
|
|
}
|
|
numcwdfound++;
|
|
error = copyout(bp, uap->buf, strlen(bp) + 1);
|
|
free(buf, M_TEMP);
|
|
return (error);
|
|
}
|