9453593a7d
(returns EPERM always, the errno is specified by POSIX). If you really have a desperate need to link or unlink a directory, you can use fsdb. :-) This should stop any chance of ftpd, rdist, "rm -rf", etc from bugging out and damaging the filesystem structure or loosing races with malicious users. Reviewed by: davidg, bde
2353 lines
47 KiB
C
2353 lines
47 KiB
C
/*
|
|
* Copyright (c) 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
* (c) UNIX System Laboratories, Inc.
|
|
* All or some portions of this file are derived from material licensed
|
|
* to the University of California by American Telephone and Telegraph
|
|
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
|
|
* the permission of UNIX System Laboratories, Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)vfs_syscalls.c 8.13 (Berkeley) 4/15/94
|
|
* $Id: vfs_syscalls.c,v 1.47 1996/05/11 04:39:53 bde Exp $
|
|
*/
|
|
|
|
/*
|
|
* XXX - The following is required because of some magic done
|
|
* in getdirentries() below which is only done if the translucent
|
|
* filesystem `UNION' is compiled into the kernel. This is broken,
|
|
* but I don't have time to study the code deeply enough to understand
|
|
* what's going on and determine an appropriate fix. -GAW
|
|
*/
|
|
#include "opt_union.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/sysproto.h>
|
|
#include <sys/namei.h>
|
|
#include <sys/filedesc.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/file.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/uio.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/dirent.h>
|
|
|
|
#ifdef UNION
|
|
#include <miscfs/union/union.h>
|
|
#endif
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_param.h>
|
|
#include <vm/vm_object.h>
|
|
#include <vm/vm_extern.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
static int change_dir __P((struct nameidata *ndp, struct proc *p));
|
|
|
|
/*
|
|
* Virtual File System System Calls
|
|
*/
|
|
|
|
/*
|
|
* Mount a file system.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mount_args {
|
|
int type;
|
|
char *path;
|
|
int flags;
|
|
caddr_t data;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
mount(p, uap, retval)
|
|
struct proc *p;
|
|
register struct mount_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
register struct mount *mp;
|
|
int error, flag = 0;
|
|
struct nameidata nd;
|
|
|
|
/*
|
|
* Must be super user
|
|
*/
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error)
|
|
return (error);
|
|
/*
|
|
* Get vnode to be covered
|
|
*/
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (uap->flags & MNT_UPDATE) {
|
|
if ((vp->v_flag & VROOT) == 0) {
|
|
vput(vp);
|
|
return (EINVAL);
|
|
}
|
|
mp = vp->v_mount;
|
|
flag = mp->mnt_flag;
|
|
/*
|
|
* We only allow the filesystem to be reloaded if it
|
|
* is currently mounted read-only.
|
|
*/
|
|
if ((uap->flags & MNT_RELOAD) &&
|
|
((mp->mnt_flag & MNT_RDONLY) == 0)) {
|
|
vput(vp);
|
|
return (EOPNOTSUPP); /* Needs translation */
|
|
}
|
|
mp->mnt_flag |=
|
|
uap->flags & (MNT_RELOAD | MNT_FORCE | MNT_UPDATE);
|
|
VOP_UNLOCK(vp);
|
|
goto update;
|
|
}
|
|
error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 0);
|
|
if (error)
|
|
return (error);
|
|
if (vp->v_type != VDIR) {
|
|
vput(vp);
|
|
return (ENOTDIR);
|
|
}
|
|
if ((u_long)uap->type > MOUNT_MAXTYPE || vfssw[uap->type] == NULL) {
|
|
vput(vp);
|
|
return (ENODEV);
|
|
}
|
|
|
|
/*
|
|
* Allocate and initialize the file system.
|
|
*/
|
|
mp = (struct mount *)malloc((u_long)sizeof(struct mount),
|
|
M_MOUNT, M_WAITOK);
|
|
bzero((char *)mp, (u_long)sizeof(struct mount));
|
|
mp->mnt_op = vfssw[uap->type];
|
|
mp->mnt_vfc = vfsconf[uap->type];
|
|
error = vfs_lock(mp);
|
|
if (error) {
|
|
free((caddr_t)mp, M_MOUNT);
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
if (vp->v_mountedhere != NULL) {
|
|
vfs_unlock(mp);
|
|
free((caddr_t)mp, M_MOUNT);
|
|
vput(vp);
|
|
return (EBUSY);
|
|
}
|
|
vp->v_mountedhere = mp;
|
|
mp->mnt_vnodecovered = vp;
|
|
vfsconf[uap->type]->vfc_refcount++;
|
|
|
|
update:
|
|
/*
|
|
* Set the mount level flags.
|
|
*/
|
|
if (uap->flags & MNT_RDONLY)
|
|
mp->mnt_flag |= MNT_RDONLY;
|
|
else if (mp->mnt_flag & MNT_RDONLY)
|
|
mp->mnt_flag |= MNT_WANTRDWR;
|
|
mp->mnt_flag &=~ (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |
|
|
MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC);
|
|
mp->mnt_flag |= uap->flags & (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |
|
|
MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_FORCE);
|
|
/*
|
|
* Mount the filesystem.
|
|
*/
|
|
error = VFS_MOUNT(mp, uap->path, uap->data, &nd, p);
|
|
if (mp->mnt_flag & MNT_UPDATE) {
|
|
vrele(vp);
|
|
if (mp->mnt_flag & MNT_WANTRDWR)
|
|
mp->mnt_flag &= ~MNT_RDONLY;
|
|
mp->mnt_flag &=~
|
|
(MNT_UPDATE | MNT_RELOAD | MNT_FORCE | MNT_WANTRDWR);
|
|
if (error)
|
|
mp->mnt_flag = flag;
|
|
return (error);
|
|
}
|
|
/*
|
|
* Put the new filesystem on the mount list after root.
|
|
*/
|
|
cache_purge(vp);
|
|
if (!error) {
|
|
CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
|
|
VOP_UNLOCK(vp);
|
|
vfs_unlock(mp);
|
|
error = VFS_START(mp, 0, p);
|
|
if (error)
|
|
vrele(vp);
|
|
} else {
|
|
mp->mnt_vnodecovered->v_mountedhere = (struct mount *)0;
|
|
vfs_unlock(mp);
|
|
free((caddr_t)mp, M_MOUNT);
|
|
vput(vp);
|
|
vfsconf[uap->type]->vfc_refcount--;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* 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, retval)
|
|
struct proc *p;
|
|
register struct unmount_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct mount *mp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
|
|
/*
|
|
* Unless this is a user mount, then must
|
|
* have suser privilege.
|
|
*/
|
|
if (((vp->v_mount->mnt_flag & MNT_USER) == 0) &&
|
|
(error = suser(p->p_ucred, &p->p_acflag))) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Must be the root of the filesystem
|
|
*/
|
|
if ((vp->v_flag & VROOT) == 0) {
|
|
vput(vp);
|
|
return (EINVAL);
|
|
}
|
|
mp = vp->v_mount;
|
|
vput(vp);
|
|
|
|
/*
|
|
* Don't allow unmount of the root filesystem
|
|
*/
|
|
if (mp->mnt_flag & MNT_ROOTFS)
|
|
return (EINVAL);
|
|
|
|
return (dounmount(mp, 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;
|
|
|
|
coveredvp = mp->mnt_vnodecovered;
|
|
if (vfs_busy(mp))
|
|
return (EBUSY);
|
|
mp->mnt_flag |= MNT_UNMOUNT;
|
|
error = vfs_lock(mp);
|
|
if (error)
|
|
return (error);
|
|
|
|
mp->mnt_flag &=~ MNT_ASYNC;
|
|
vfs_msync(mp, MNT_NOWAIT);
|
|
vnode_pager_umount(mp); /* release cached vnodes */
|
|
cache_purgevfs(mp); /* remove cache entries for this file sys */
|
|
if ((error = VFS_SYNC(mp, MNT_WAIT, p->p_ucred, p)) == 0 ||
|
|
(flags & MNT_FORCE))
|
|
error = VFS_UNMOUNT(mp, flags, p);
|
|
mp->mnt_flag &= ~MNT_UNMOUNT;
|
|
vfs_unbusy(mp);
|
|
if (error) {
|
|
vfs_unlock(mp);
|
|
} else {
|
|
vrele(coveredvp);
|
|
CIRCLEQ_REMOVE(&mountlist, mp, mnt_list);
|
|
mp->mnt_vnodecovered->v_mountedhere = (struct mount *)0;
|
|
vfs_unlock(mp);
|
|
mp->mnt_vfc->vfc_refcount--;
|
|
if (mp->mnt_vnodelist.lh_first != NULL)
|
|
panic("unmount: dangling vnode");
|
|
free((caddr_t)mp, M_MOUNT);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Sync each mounted filesystem.
|
|
*/
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct sync_args {
|
|
int dummy;
|
|
};
|
|
#endif
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
sync(p, uap, retval)
|
|
struct proc *p;
|
|
struct sync_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct mount *mp;
|
|
int asyncflag;
|
|
|
|
for (mp = mountlist.cqh_first; mp != (void *)&mountlist; mp = mp->mnt_list.cqe_next) {
|
|
/*
|
|
* The lock check below is to avoid races with mount
|
|
* and unmount.
|
|
*/
|
|
if ((mp->mnt_flag & (MNT_MLOCK|MNT_RDONLY|MNT_MPBUSY)) == 0 &&
|
|
!vfs_busy(mp)) {
|
|
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);
|
|
if (asyncflag)
|
|
mp->mnt_flag |= MNT_ASYNC;
|
|
vfs_unbusy(mp);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* 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, retval)
|
|
struct proc *p;
|
|
register struct quotactl_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct mount *mp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
mp = nd.ni_vp->v_mount;
|
|
vrele(nd.ni_vp);
|
|
return (VFS_QUOTACTL(mp, uap->cmd, uap->uid, uap->arg, p));
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct statfs_args {
|
|
char *path;
|
|
struct statfs *buf;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
statfs(p, uap, retval)
|
|
struct proc *p;
|
|
register struct statfs_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct mount *mp;
|
|
register struct statfs *sp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
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;
|
|
return (copyout((caddr_t)sp, (caddr_t)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, retval)
|
|
struct proc *p;
|
|
register struct fstatfs_args *uap;
|
|
int *retval;
|
|
{
|
|
struct file *fp;
|
|
struct mount *mp;
|
|
register struct statfs *sp;
|
|
int error;
|
|
|
|
error = getvnode(p->p_fd, uap->fd, &fp);
|
|
if (error)
|
|
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;
|
|
return (copyout((caddr_t)sp, (caddr_t)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, retval)
|
|
struct proc *p;
|
|
register struct getfsstat_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct mount *mp, *nmp;
|
|
register struct statfs *sp;
|
|
caddr_t sfsp;
|
|
long count, maxcount, error;
|
|
|
|
maxcount = uap->bufsize / sizeof(struct statfs);
|
|
sfsp = (caddr_t)uap->buf;
|
|
count = 0;
|
|
for (mp = mountlist.cqh_first; mp != (void *)&mountlist; mp = nmp) {
|
|
if (vfs_busy(mp)) {
|
|
nmp = mp->mnt_list.cqe_next;
|
|
continue;
|
|
}
|
|
if (sfsp && count < maxcount &&
|
|
((mp->mnt_flag & MNT_MLOCK) == 0)) {
|
|
sp = &mp->mnt_stat;
|
|
/*
|
|
* If MNT_NOWAIT is specified, do not refresh the
|
|
* fsstat cache. MNT_WAIT overrides MNT_NOWAIT.
|
|
*/
|
|
if (((uap->flags & MNT_NOWAIT) == 0 ||
|
|
(uap->flags & MNT_WAIT)) &&
|
|
(error = VFS_STATFS(mp, sp, p))) {
|
|
nmp = mp->mnt_list.cqe_next;
|
|
vfs_unbusy(mp);
|
|
continue;
|
|
}
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
error = copyout((caddr_t)sp, sfsp, sizeof(*sp));
|
|
if (error) {
|
|
vfs_unbusy(mp);
|
|
return (error);
|
|
}
|
|
sfsp += sizeof(*sp);
|
|
}
|
|
count++;
|
|
nmp = mp->mnt_list.cqe_next;
|
|
vfs_unbusy(mp);
|
|
}
|
|
if (sfsp && count > maxcount)
|
|
*retval = maxcount;
|
|
else
|
|
*retval = 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, retval)
|
|
struct proc *p;
|
|
struct fchdir_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct filedesc *fdp = p->p_fd;
|
|
register struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
error = getvnode(fdp, uap->fd, &fp);
|
|
if (error)
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
VOP_LOCK(vp);
|
|
if (vp->v_type != VDIR)
|
|
error = ENOTDIR;
|
|
else
|
|
error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);
|
|
VOP_UNLOCK(vp);
|
|
if (error)
|
|
return (error);
|
|
VREF(vp);
|
|
vrele(fdp->fd_cdir);
|
|
fdp->fd_cdir = vp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Change current working directory (``.'').
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chdir_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
chdir(p, uap, retval)
|
|
struct proc *p;
|
|
struct chdir_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct filedesc *fdp = p->p_fd;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->path, p);
|
|
error = change_dir(&nd, p);
|
|
if (error)
|
|
return (error);
|
|
vrele(fdp->fd_cdir);
|
|
fdp->fd_cdir = nd.ni_vp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Change notion of root (``/'') directory.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chroot_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
chroot(p, uap, retval)
|
|
struct proc *p;
|
|
struct chroot_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct filedesc *fdp = p->p_fd;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->path, p);
|
|
error = change_dir(&nd, p);
|
|
if (error)
|
|
return (error);
|
|
if (fdp->fd_rdir != NULL)
|
|
vrele(fdp->fd_rdir);
|
|
fdp->fd_rdir = nd.ni_vp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Common routine for chroot and chdir.
|
|
*/
|
|
static int
|
|
change_dir(ndp, p)
|
|
register struct nameidata *ndp;
|
|
struct proc *p;
|
|
{
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
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);
|
|
VOP_UNLOCK(vp);
|
|
if (error)
|
|
vrele(vp);
|
|
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, retval)
|
|
struct proc *p;
|
|
register struct open_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct filedesc *fdp = p->p_fd;
|
|
register struct file *fp;
|
|
register struct vnode *vp;
|
|
int flags, cmode;
|
|
struct file *nfp;
|
|
int type, indx, error;
|
|
struct flock lf;
|
|
struct nameidata nd;
|
|
|
|
error = falloc(p, &nfp, &indx);
|
|
if (error)
|
|
return (error);
|
|
fp = nfp;
|
|
flags = FFLAGS(uap->flags);
|
|
cmode = ((uap->mode &~ fdp->fd_cmask) & ALLPERMS) &~ S_ISTXT;
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 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) {
|
|
*retval = 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 = 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);
|
|
error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type);
|
|
if (error) {
|
|
(void) vn_close(vp, fp->f_flag, fp->f_cred, p);
|
|
ffree(fp);
|
|
fdp->fd_ofiles[indx] = NULL;
|
|
return (error);
|
|
}
|
|
VOP_LOCK(vp);
|
|
fp->f_flag |= FHASLOCK;
|
|
}
|
|
VOP_UNLOCK(vp);
|
|
*retval = indx;
|
|
return (0);
|
|
}
|
|
|
|
#ifdef COMPAT_43
|
|
/*
|
|
* Create a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ocreat_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
ocreat(p, uap, retval)
|
|
struct proc *p;
|
|
register struct ocreat_args *uap;
|
|
int *retval;
|
|
{
|
|
struct open_args openuap;
|
|
|
|
openuap.path = uap->path;
|
|
openuap.mode = uap->mode;
|
|
openuap.flags = O_WRONLY | O_CREAT | O_TRUNC;
|
|
return (open(p, &openuap, retval));
|
|
}
|
|
#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, retval)
|
|
struct proc *p;
|
|
register struct mknod_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error)
|
|
return (error);
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp != NULL)
|
|
error = EEXIST;
|
|
else {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = (uap->mode & ALLPERMS) &~ p->p_fd->fd_cmask;
|
|
vattr.va_rdev = uap->dev;
|
|
|
|
switch (uap->mode & S_IFMT) {
|
|
case S_IFMT: /* used by badsect to flag bad sectors */
|
|
vattr.va_type = VBAD;
|
|
break;
|
|
case S_IFCHR:
|
|
vattr.va_type = VCHR;
|
|
break;
|
|
case S_IFBLK:
|
|
vattr.va_type = VBLK;
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
}
|
|
if (!error) {
|
|
LEASE_CHECK(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
|
|
} 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);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Create named pipe.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mkfifo_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
mkfifo(p, uap, retval)
|
|
struct proc *p;
|
|
register struct mkfifo_args *uap;
|
|
int *retval;
|
|
{
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
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 = (uap->mode & ALLPERMS) &~ p->p_fd->fd_cmask;
|
|
LEASE_CHECK(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
return (VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr));
|
|
}
|
|
|
|
/*
|
|
* Make a hard file link.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct link_args {
|
|
char *path;
|
|
char *link;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
link(p, uap, retval)
|
|
struct proc *p;
|
|
register struct link_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type == VDIR)
|
|
error = EPERM; /* POSIX */
|
|
else {
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, uap->link, p);
|
|
error = namei(&nd);
|
|
if (!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);
|
|
if (nd.ni_vp)
|
|
vrele(nd.ni_vp);
|
|
error = EEXIST;
|
|
} else {
|
|
LEASE_CHECK(nd.ni_dvp,
|
|
p, p->p_ucred, LEASE_WRITE);
|
|
LEASE_CHECK(vp,
|
|
p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd);
|
|
}
|
|
}
|
|
}
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a symbolic link.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct symlink_args {
|
|
char *path;
|
|
char *link;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
symlink(p, uap, retval)
|
|
struct proc *p;
|
|
register struct symlink_args *uap;
|
|
int *retval;
|
|
{
|
|
struct vattr vattr;
|
|
char *path;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
MALLOC(path, char *, MAXPATHLEN, M_NAMEI, M_WAITOK);
|
|
error = copyinstr(uap->path, path, MAXPATHLEN, NULL);
|
|
if (error)
|
|
goto out;
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, uap->link, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
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;
|
|
LEASE_CHECK(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, path);
|
|
out:
|
|
FREE(path, M_NAMEI);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Delete a name from the filesystem.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct unlink_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
unlink(p, uap, retval)
|
|
struct proc *p;
|
|
struct unlink_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, DELETE, LOCKPARENT, UIO_USERSPACE, uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LOCK(vp);
|
|
|
|
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;
|
|
else
|
|
(void) vnode_pager_uncache(vp);
|
|
}
|
|
|
|
if (!error) {
|
|
LEASE_CHECK(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
|
|
} else {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vput(vp);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* 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, retval)
|
|
struct proc *p;
|
|
register struct lseek_args *uap;
|
|
int *retval;
|
|
{
|
|
struct ucred *cred = p->p_ucred;
|
|
register struct filedesc *fdp = p->p_fd;
|
|
register struct file *fp;
|
|
struct vattr vattr;
|
|
int error;
|
|
|
|
if ((u_int)uap->fd >= fdp->fd_nfiles ||
|
|
(fp = fdp->fd_ofiles[uap->fd]) == NULL)
|
|
return (EBADF);
|
|
if (fp->f_type != DTYPE_VNODE)
|
|
return (ESPIPE);
|
|
switch (uap->whence) {
|
|
case L_INCR:
|
|
fp->f_offset += uap->offset;
|
|
break;
|
|
case L_XTND:
|
|
error=VOP_GETATTR((struct vnode *)fp->f_data, &vattr, cred, p);
|
|
if (error)
|
|
return (error);
|
|
fp->f_offset = uap->offset + vattr.va_size;
|
|
break;
|
|
case L_SET:
|
|
fp->f_offset = uap->offset;
|
|
break;
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
*(off_t *)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, retval)
|
|
struct proc *p;
|
|
register struct olseek_args *uap;
|
|
int *retval;
|
|
{
|
|
struct lseek_args nuap;
|
|
off_t qret;
|
|
int error;
|
|
|
|
nuap.fd = uap->fd;
|
|
nuap.offset = uap->offset;
|
|
nuap.whence = uap->whence;
|
|
error = lseek(p, &nuap, (int *)&qret);
|
|
*(long *)retval = qret;
|
|
return (error);
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
/*
|
|
* Check access permissions.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct access_args {
|
|
char *path;
|
|
int flags;
|
|
};
|
|
#endif
|
|
int
|
|
access(p, uap, retval)
|
|
struct proc *p;
|
|
register struct access_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct ucred *cred = p->p_ucred;
|
|
register struct vnode *vp;
|
|
int error, flags, t_gid, t_uid;
|
|
struct nameidata nd;
|
|
|
|
t_uid = cred->cr_uid;
|
|
t_gid = cred->cr_groups[0];
|
|
cred->cr_uid = p->p_cred->p_ruid;
|
|
cred->cr_groups[0] = p->p_cred->p_rgid;
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
goto out1;
|
|
vp = nd.ni_vp;
|
|
|
|
/* Flags == 0 means only check for existence. */
|
|
if (uap->flags) {
|
|
flags = 0;
|
|
if (uap->flags & R_OK)
|
|
flags |= VREAD;
|
|
if (uap->flags & W_OK)
|
|
flags |= VWRITE;
|
|
if (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, retval)
|
|
struct proc *p;
|
|
register struct ostat_args *uap;
|
|
int *retval;
|
|
{
|
|
struct stat sb;
|
|
struct ostat osb;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
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)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, retval)
|
|
struct proc *p;
|
|
register struct olstat_args *uap;
|
|
int *retval;
|
|
{
|
|
struct vnode *vp, *dvp;
|
|
struct stat sb, sb1;
|
|
struct ostat osb;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | LOCKPARENT, UIO_USERSPACE,
|
|
uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
/*
|
|
* For symbolic links, always return the attributes of its
|
|
* containing directory, except for mode, size, and links.
|
|
*/
|
|
vp = nd.ni_vp;
|
|
dvp = nd.ni_dvp;
|
|
if (vp->v_type != VLNK) {
|
|
if (dvp == vp)
|
|
vrele(dvp);
|
|
else
|
|
vput(dvp);
|
|
error = vn_stat(vp, &sb, p);
|
|
vput(vp);
|
|
if (error)
|
|
return (error);
|
|
} else {
|
|
error = vn_stat(dvp, &sb, p);
|
|
vput(dvp);
|
|
if (error) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
error = vn_stat(vp, &sb1, p);
|
|
vput(vp);
|
|
if (error)
|
|
return (error);
|
|
sb.st_mode &= ~S_IFDIR;
|
|
sb.st_mode |= S_IFLNK;
|
|
sb.st_nlink = sb1.st_nlink;
|
|
sb.st_size = sb1.st_size;
|
|
sb.st_blocks = sb1.st_blocks;
|
|
}
|
|
cvtstat(&sb, &osb);
|
|
error = copyout((caddr_t)&osb, (caddr_t)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, retval)
|
|
struct proc *p;
|
|
register struct stat_args *uap;
|
|
int *retval;
|
|
{
|
|
struct stat sb;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
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)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, retval)
|
|
struct proc *p;
|
|
register struct lstat_args *uap;
|
|
int *retval;
|
|
{
|
|
int error;
|
|
struct vnode *vp, *dvp;
|
|
struct stat sb, sb1;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | LOCKPARENT, UIO_USERSPACE,
|
|
uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
/*
|
|
* For symbolic links, always return the attributes of its
|
|
* containing directory, except for mode, size, and links.
|
|
*/
|
|
vp = nd.ni_vp;
|
|
dvp = nd.ni_dvp;
|
|
if (vp->v_type != VLNK) {
|
|
if (dvp == vp)
|
|
vrele(dvp);
|
|
else
|
|
vput(dvp);
|
|
error = vn_stat(vp, &sb, p);
|
|
vput(vp);
|
|
if (error)
|
|
return (error);
|
|
} else {
|
|
error = vn_stat(dvp, &sb, p);
|
|
vput(dvp);
|
|
if (error) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
error = vn_stat(vp, &sb1, p);
|
|
vput(vp);
|
|
if (error)
|
|
return (error);
|
|
sb.st_mode &= ~S_IFDIR;
|
|
sb.st_mode |= S_IFLNK;
|
|
sb.st_nlink = sb1.st_nlink;
|
|
sb.st_size = sb1.st_size;
|
|
sb.st_blocks = sb1.st_blocks;
|
|
}
|
|
error = copyout((caddr_t)&sb, (caddr_t)uap->ub, sizeof (sb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get configurable pathname variables.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct pathconf_args {
|
|
char *path;
|
|
int name;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
pathconf(p, uap, retval)
|
|
struct proc *p;
|
|
register struct pathconf_args *uap;
|
|
int *retval;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
error = VOP_PATHCONF(nd.ni_vp, uap->name, 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, retval)
|
|
struct proc *p;
|
|
register struct readlink_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct iovec aiov;
|
|
struct uio auio;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type != VLNK)
|
|
error = EINVAL;
|
|
else {
|
|
aiov.iov_base = uap->buf;
|
|
aiov.iov_len = 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 = uap->count;
|
|
error = VOP_READLINK(vp, &auio, p->p_ucred);
|
|
}
|
|
vput(vp);
|
|
*retval = uap->count - auio.uio_resid;
|
|
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, retval)
|
|
struct proc *p;
|
|
register struct chflags_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LOCK(vp);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_flags = uap->flags;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
vput(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, retval)
|
|
struct proc *p;
|
|
register struct fchflags_args *uap;
|
|
int *retval;
|
|
{
|
|
struct vattr vattr;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
error = getvnode(p->p_fd, uap->fd, &fp);
|
|
if (error)
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LOCK(vp);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_flags = uap->flags;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
VOP_UNLOCK(vp);
|
|
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, retval)
|
|
struct proc *p;
|
|
register struct chmod_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LOCK(vp);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = uap->mode & ALLPERMS;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change mode of a file given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchmod_args {
|
|
int fd;
|
|
int mode;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
fchmod(p, uap, retval)
|
|
struct proc *p;
|
|
register struct fchmod_args *uap;
|
|
int *retval;
|
|
{
|
|
struct vattr vattr;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
error = getvnode(p->p_fd, uap->fd, &fp);
|
|
if (error)
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LOCK(vp);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = uap->mode & ALLPERMS;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
VOP_UNLOCK(vp);
|
|
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, retval)
|
|
struct proc *p;
|
|
register struct chown_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LOCK(vp);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_uid = uap->uid;
|
|
vattr.va_gid = uap->gid;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
vput(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, retval)
|
|
struct proc *p;
|
|
register struct fchown_args *uap;
|
|
int *retval;
|
|
{
|
|
struct vattr vattr;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
error = getvnode(p->p_fd, uap->fd, &fp);
|
|
if (error)
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LOCK(vp);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_uid = uap->uid;
|
|
vattr.va_gid = uap->gid;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
VOP_UNLOCK(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the access and modification times of a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct utimes_args {
|
|
char *path;
|
|
struct timeval *tptr;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
utimes(p, uap, retval)
|
|
struct proc *p;
|
|
register struct utimes_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct timeval tv[2];
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
VATTR_NULL(&vattr);
|
|
if (uap->tptr == NULL) {
|
|
microtime(&tv[0]);
|
|
tv[1] = tv[0];
|
|
vattr.va_vaflags |= VA_UTIMES_NULL;
|
|
} else {
|
|
error = copyin((caddr_t)uap->tptr, (caddr_t)tv, sizeof (tv));
|
|
if (error)
|
|
return (error);
|
|
}
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LOCK(vp);
|
|
vattr.va_atime.ts_sec = tv[0].tv_sec;
|
|
vattr.va_atime.ts_nsec = tv[0].tv_usec * 1000;
|
|
vattr.va_mtime.ts_sec = tv[1].tv_sec;
|
|
vattr.va_mtime.ts_nsec = tv[1].tv_usec * 1000;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Truncate a file given its path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct truncate_args {
|
|
char *path;
|
|
int pad;
|
|
off_t length;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
truncate(p, uap, retval)
|
|
struct proc *p;
|
|
register struct truncate_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
if (uap->length < 0)
|
|
return(EINVAL);
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LOCK(vp);
|
|
if (vp->v_type == VDIR)
|
|
error = EISDIR;
|
|
else if ((error = vn_writechk(vp)) == 0 &&
|
|
(error = VOP_ACCESS(vp, VWRITE, p->p_ucred, p)) == 0) {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_size = 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, retval)
|
|
struct proc *p;
|
|
register struct ftruncate_args *uap;
|
|
int *retval;
|
|
{
|
|
struct vattr vattr;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if (uap->length < 0)
|
|
return(EINVAL);
|
|
error = getvnode(p->p_fd, uap->fd, &fp);
|
|
if (error)
|
|
return (error);
|
|
if ((fp->f_flag & FWRITE) == 0)
|
|
return (EINVAL);
|
|
vp = (struct vnode *)fp->f_data;
|
|
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LOCK(vp);
|
|
if (vp->v_type == VDIR)
|
|
error = EISDIR;
|
|
else if ((error = vn_writechk(vp)) == 0) {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_size = uap->length;
|
|
error = VOP_SETATTR(vp, &vattr, fp->f_cred, p);
|
|
}
|
|
VOP_UNLOCK(vp);
|
|
return (error);
|
|
}
|
|
|
|
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
|
|
/*
|
|
* Truncate a file given its path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct otruncate_args {
|
|
char *path;
|
|
long length;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
otruncate(p, uap, retval)
|
|
struct proc *p;
|
|
register struct otruncate_args *uap;
|
|
int *retval;
|
|
{
|
|
struct truncate_args nuap;
|
|
|
|
nuap.path = uap->path;
|
|
nuap.length = uap->length;
|
|
return (truncate(p, &nuap, retval));
|
|
}
|
|
|
|
/*
|
|
* Truncate a file given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct oftruncate_args {
|
|
int fd;
|
|
long length;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
oftruncate(p, uap, retval)
|
|
struct proc *p;
|
|
register struct oftruncate_args *uap;
|
|
int *retval;
|
|
{
|
|
struct ftruncate_args nuap;
|
|
|
|
nuap.fd = uap->fd;
|
|
nuap.length = uap->length;
|
|
return (ftruncate(p, &nuap, retval));
|
|
}
|
|
#endif /* COMPAT_43 || COMPAT_SUNOS */
|
|
|
|
/*
|
|
* Sync an open file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fsync_args {
|
|
int fd;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
fsync(p, uap, retval)
|
|
struct proc *p;
|
|
struct fsync_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
error = getvnode(p->p_fd, uap->fd, &fp);
|
|
if (error)
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
VOP_LOCK(vp);
|
|
if (vp->v_object) {
|
|
vm_object_page_clean(vp->v_object, 0, 0 ,0, FALSE);
|
|
}
|
|
error = VOP_FSYNC(vp, fp->f_cred,
|
|
(vp->v_mount->mnt_flag & MNT_ASYNC) ? MNT_NOWAIT : MNT_WAIT, p);
|
|
VOP_UNLOCK(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Rename files. Source and destination must either both be directories,
|
|
* or both not be directories. If target is a directory, it must be empty.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct rename_args {
|
|
char *from;
|
|
char *to;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
rename(p, uap, retval)
|
|
struct proc *p;
|
|
register struct rename_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct vnode *tvp, *fvp, *tdvp;
|
|
struct nameidata fromnd, tond;
|
|
int error;
|
|
|
|
NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE,
|
|
uap->from, p);
|
|
error = namei(&fromnd);
|
|
if (error)
|
|
return (error);
|
|
fvp = fromnd.ni_vp;
|
|
NDINIT(&tond, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART,
|
|
UIO_USERSPACE, uap->to, p);
|
|
if (fromnd.ni_vp->v_type == VDIR)
|
|
tond.ni_cnd.cn_flags |= WILLBEDIR;
|
|
error = namei(&tond);
|
|
if (error) {
|
|
/* 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) {
|
|
LEASE_CHECK(tdvp, p, p->p_ucred, LEASE_WRITE);
|
|
if (fromnd.ni_dvp != tdvp) {
|
|
LEASE_CHECK(fromnd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
}
|
|
if (tvp) {
|
|
LEASE_CHECK(tvp, p, p->p_ucred, LEASE_WRITE);
|
|
(void) vnode_pager_uncache(tvp);
|
|
}
|
|
error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd,
|
|
tond.ni_dvp, tond.ni_vp, &tond.ni_cnd);
|
|
} else {
|
|
VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd);
|
|
if (tdvp == tvp)
|
|
vrele(tdvp);
|
|
else
|
|
vput(tdvp);
|
|
if (tvp)
|
|
vput(tvp);
|
|
VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
|
|
vrele(fromnd.ni_dvp);
|
|
vrele(fvp);
|
|
}
|
|
vrele(tond.ni_startdir);
|
|
FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI);
|
|
out1:
|
|
if (fromnd.ni_startdir)
|
|
vrele(fromnd.ni_startdir);
|
|
FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI);
|
|
if (error == -1)
|
|
return (0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a directory file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mkdir_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
mkdir(p, uap, retval)
|
|
struct proc *p;
|
|
register struct mkdir_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, uap->path, p);
|
|
nd.ni_cnd.cn_flags |= WILLBEDIR;
|
|
error = namei(&nd);
|
|
if (error)
|
|
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 = (uap->mode & ACCESSPERMS) &~ p->p_fd->fd_cmask;
|
|
LEASE_CHECK(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
|
|
if (!error)
|
|
vput(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Remove a directory file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct rmdir_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
rmdir(p, uap, retval)
|
|
struct proc *p;
|
|
struct rmdir_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE, uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
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) {
|
|
LEASE_CHECK(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
|
|
} else {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vput(vp);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
#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, retval)
|
|
struct proc *p;
|
|
register struct ogetdirentries_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct file *fp;
|
|
struct uio auio, kuio;
|
|
struct iovec aiov, kiov;
|
|
struct dirent *dp, *edp;
|
|
caddr_t dirbuf;
|
|
int error, readcnt;
|
|
long loff;
|
|
|
|
error = getvnode(p->p_fd, uap->fd, &fp);
|
|
if (error)
|
|
return (error);
|
|
if ((fp->f_flag & FREAD) == 0)
|
|
return (EBADF);
|
|
vp = (struct vnode *)fp->f_data;
|
|
if (vp->v_type != VDIR)
|
|
return (EINVAL);
|
|
aiov.iov_base = uap->buf;
|
|
aiov.iov_len = 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 = uap->count;
|
|
VOP_LOCK(vp);
|
|
loff = auio.uio_offset = fp->f_offset;
|
|
# if (BYTE_ORDER != LITTLE_ENDIAN)
|
|
if (vp->v_mount->mnt_maxsymlinklen <= 0) {
|
|
error = VOP_READDIR(vp, &auio, fp->f_cred, NULL, NULL, NULL);
|
|
fp->f_offset = auio.uio_offset;
|
|
} else
|
|
# endif
|
|
{
|
|
kuio = auio;
|
|
kuio.uio_iov = &kiov;
|
|
kuio.uio_segflg = UIO_SYSSPACE;
|
|
kiov.iov_len = uap->count;
|
|
MALLOC(dirbuf, caddr_t, uap->count, M_TEMP, M_WAITOK);
|
|
kiov.iov_base = dirbuf;
|
|
error = VOP_READDIR(vp, &kuio, fp->f_cred, NULL, NULL, NULL);
|
|
fp->f_offset = kuio.uio_offset;
|
|
if (error == 0) {
|
|
readcnt = uap->count - kuio.uio_resid;
|
|
edp = (struct dirent *)&dirbuf[readcnt];
|
|
for (dp = (struct dirent *)dirbuf; dp < edp; ) {
|
|
# if (BYTE_ORDER == LITTLE_ENDIAN)
|
|
/*
|
|
* The expected low byte of
|
|
* dp->d_namlen is our dp->d_type.
|
|
* The high MBZ byte of dp->d_namlen
|
|
* is our dp->d_namlen.
|
|
*/
|
|
dp->d_type = dp->d_namlen;
|
|
dp->d_namlen = 0;
|
|
# else
|
|
/*
|
|
* The dp->d_type is the high byte
|
|
* of the expected dp->d_namlen,
|
|
* so must be zero'ed.
|
|
*/
|
|
dp->d_type = 0;
|
|
# endif
|
|
if (dp->d_reclen > 0) {
|
|
dp = (struct dirent *)
|
|
((char *)dp + dp->d_reclen);
|
|
} else {
|
|
error = EIO;
|
|
break;
|
|
}
|
|
}
|
|
if (dp >= edp)
|
|
error = uiomove(dirbuf, readcnt, &auio);
|
|
}
|
|
FREE(dirbuf, M_TEMP);
|
|
}
|
|
VOP_UNLOCK(vp);
|
|
if (error)
|
|
return (error);
|
|
error = copyout((caddr_t)&loff, (caddr_t)uap->basep, sizeof(long));
|
|
*retval = uap->count - auio.uio_resid;
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* 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, retval)
|
|
struct proc *p;
|
|
register struct getdirentries_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct file *fp;
|
|
struct uio auio;
|
|
struct iovec aiov;
|
|
long loff;
|
|
int error;
|
|
|
|
error = getvnode(p->p_fd, uap->fd, &fp);
|
|
if (error)
|
|
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 = uap->buf;
|
|
aiov.iov_len = 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 = uap->count;
|
|
VOP_LOCK(vp);
|
|
loff = auio.uio_offset = fp->f_offset;
|
|
error = VOP_READDIR(vp, &auio, fp->f_cred, NULL, NULL, NULL);
|
|
fp->f_offset = auio.uio_offset;
|
|
VOP_UNLOCK(vp);
|
|
if (error)
|
|
return (error);
|
|
|
|
#ifdef UNION
|
|
{
|
|
if ((uap->count == auio.uio_resid) &&
|
|
(vp->v_op == union_vnodeop_p)) {
|
|
struct vnode *tvp = vp;
|
|
|
|
vp = union_lowervp(vp);
|
|
if (vp != NULLVP) {
|
|
VOP_LOCK(vp);
|
|
error = VOP_OPEN(vp, FREAD, fp->f_cred, p);
|
|
VOP_UNLOCK(vp);
|
|
|
|
if (error) {
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
fp->f_data = (caddr_t) vp;
|
|
fp->f_offset = 0;
|
|
error = vn_close(tvp, FREAD, fp->f_cred, p);
|
|
if (error)
|
|
return (error);
|
|
goto unionread;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if ((uap->count == auio.uio_resid) &&
|
|
vp &&
|
|
(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)uap->basep, sizeof(long));
|
|
*retval = uap->count - auio.uio_resid;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the mode mask for creation of filesystem nodes.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct umask_args {
|
|
int newmask;
|
|
};
|
|
#endif
|
|
mode_t /* XXX */
|
|
umask(p, uap, retval)
|
|
struct proc *p;
|
|
struct umask_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct filedesc *fdp;
|
|
|
|
fdp = p->p_fd;
|
|
*retval = fdp->fd_cmask;
|
|
fdp->fd_cmask = 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, retval)
|
|
struct proc *p;
|
|
register struct revoke_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type != VCHR && vp->v_type != VBLK) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
error = VOP_GETATTR(vp, &vattr, p->p_ucred, p);
|
|
if (error)
|
|
goto out;
|
|
if (p->p_ucred->cr_uid != vattr.va_uid &&
|
|
(error = suser(p->p_ucred, &p->p_acflag)))
|
|
goto out;
|
|
if (vp->v_usecount > 1 || (vp->v_flag & VALIASED))
|
|
vgoneall(vp);
|
|
out:
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Convert a user file descriptor to a kernel file entry.
|
|
*/
|
|
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)
|
|
return (EINVAL);
|
|
*fpp = fp;
|
|
return (0);
|
|
}
|