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-rw-r--r--sys/kern/vfs_syscalls.c3034
1 files changed, 3034 insertions, 0 deletions
diff --git a/sys/kern/vfs_syscalls.c b/sys/kern/vfs_syscalls.c
new file mode 100644
index 0000000..18e39d6
--- /dev/null
+++ b/sys/kern/vfs_syscalls.c
@@ -0,0 +1,3034 @@
+/*
+ * 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 1.111 1998/12/12 21:07:09 dillon Exp $
+ */
+
+/* For 4.3 integer FS ID compatibility */
+#include "opt_compat.h"
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/sysent.h>
+#include <sys/sysproto.h>
+#include <sys/namei.h>
+#include <sys/filedesc.h>
+#include <sys/kernel.h>
+#include <sys/fcntl.h>
+#include <sys/file.h>
+#include <sys/linker.h>
+#include <sys/stat.h>
+#include <sys/unistd.h>
+#include <sys/vnode.h>
+#include <sys/malloc.h>
+#include <sys/mount.h>
+#include <sys/proc.h>
+#include <sys/dirent.h>
+
+#include <miscfs/union/union.h>
+
+#include <vm/vm.h>
+#include <vm/vm_object.h>
+#include <vm/vm_extern.h>
+#include <vm/vm_zone.h>
+#include <sys/sysctl.h>
+
+static int change_dir __P((struct nameidata *ndp, struct proc *p));
+static void checkdirs __P((struct vnode *olddp));
+static int setfown __P((struct proc *, struct vnode *, uid_t, gid_t));
+static int setfmode __P((struct proc *, struct vnode *, int));
+static int setfflags __P((struct proc *, struct vnode *, int));
+static int setutimes __P((struct proc *, struct vnode *, struct timeval *, int));
+static int usermount = 0; /* if 1, non-root can mount fs. */
+
+int (*union_dircheckp) __P((struct proc *, struct vnode **, struct file *));
+
+SYSCTL_INT(_vfs, OID_AUTO, usermount, CTLFLAG_RW, &usermount, 0, "");
+
+/*
+ * Virtual File System System Calls
+ */
+
+/*
+ * Mount a file system.
+ */
+#ifndef _SYS_SYSPROTO_H_
+struct mount_args {
+ char *type;
+ char *path;
+ int flags;
+ caddr_t data;
+};
+#endif
+/* ARGSUSED */
+int
+mount(p, uap)
+ struct proc *p;
+ register struct mount_args /* {
+ syscallarg(char *) type;
+ syscallarg(char *) path;
+ syscallarg(int) flags;
+ syscallarg(caddr_t) data;
+ } */ *uap;
+{
+ struct vnode *vp;
+ struct mount *mp;
+ struct vfsconf *vfsp;
+ int error, flag = 0, flag2 = 0;
+ struct vattr va;
+ u_long fstypenum;
+ struct nameidata nd;
+ char fstypename[MFSNAMELEN];
+
+ if (usermount == 0 && (error = suser(p->p_ucred, &p->p_acflag)))
+ return (error);
+
+ /*
+ * Get vnode to be covered
+ */
+ NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
+ SCARG(uap, path), p);
+ if (error = namei(&nd))
+ return (error);
+ vp = nd.ni_vp;
+ if (SCARG(uap, flags) & MNT_UPDATE) {
+ if ((vp->v_flag & VROOT) == 0) {
+ vput(vp);
+ return (EINVAL);
+ }
+ mp = vp->v_mount;
+ flag = mp->mnt_flag;
+ flag2 = mp->mnt_kern_flag;
+ /*
+ * We only allow the filesystem to be reloaded if it
+ * is currently mounted read-only.
+ */
+ if ((SCARG(uap, flags) & MNT_RELOAD) &&
+ ((mp->mnt_flag & MNT_RDONLY) == 0)) {
+ vput(vp);
+ return (EOPNOTSUPP); /* Needs translation */
+ }
+ mp->mnt_flag |=
+ SCARG(uap, flags) & (MNT_RELOAD | MNT_FORCE | MNT_UPDATE);
+ /*
+ * Only root, or the user that did the original mount is
+ * permitted to update it.
+ */
+ if (mp->mnt_stat.f_owner != p->p_ucred->cr_uid &&
+ (error = suser(p->p_ucred, &p->p_acflag))) {
+ vput(vp);
+ return (error);
+ }
+ /*
+ * Do not allow NFS export by non-root users. Silently
+ * enforce MNT_NOSUID and MNT_NODEV for non-root users.
+ */
+ if (p->p_ucred->cr_uid != 0) {
+ if (SCARG(uap, flags) & MNT_EXPORTED) {
+ vput(vp);
+ return (EPERM);
+ }
+ SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;
+ }
+ if (vfs_busy(mp, LK_NOWAIT, 0, p)) {
+ vput(vp);
+ return (EBUSY);
+ }
+ VOP_UNLOCK(vp, 0, p);
+ goto update;
+ }
+ /*
+ * If the user is not root, ensure that they own the directory
+ * onto which we are attempting to mount.
+ */
+ if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)) ||
+ (va.va_uid != p->p_ucred->cr_uid &&
+ (error = suser(p->p_ucred, &p->p_acflag)))) {
+ vput(vp);
+ return (error);
+ }
+ /*
+ * Do not allow NFS export by non-root users. Silently
+ * enforce MNT_NOSUID and MNT_NODEV for non-root users.
+ */
+ if (p->p_ucred->cr_uid != 0) {
+ if (SCARG(uap, flags) & MNT_EXPORTED) {
+ vput(vp);
+ return (EPERM);
+ }
+ SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;
+ }
+ if (error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 0))
+ return (error);
+ if (vp->v_type != VDIR) {
+ vput(vp);
+ return (ENOTDIR);
+ }
+#ifdef COMPAT_43
+ /*
+ * Historically filesystem types were identified by number. If we
+ * get an integer for the filesystem type instead of a string, we
+ * check to see if it matches one of the historic filesystem types.
+ */
+ fstypenum = (uintptr_t)SCARG(uap, type);
+ if (fstypenum < maxvfsconf) {
+ for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
+ if (vfsp->vfc_typenum == fstypenum)
+ break;
+ if (vfsp == NULL) {
+ vput(vp);
+ return (ENODEV);
+ }
+ strncpy(fstypename, vfsp->vfc_name, MFSNAMELEN);
+ } else
+#endif /* COMPAT_43 */
+ if (error = copyinstr(SCARG(uap, type), fstypename, MFSNAMELEN, NULL)) {
+ vput(vp);
+ return (error);
+ }
+ for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
+ if (!strcmp(vfsp->vfc_name, fstypename))
+ break;
+ if (vfsp == NULL) {
+ linker_file_t lf;
+
+ /* Refuse to load modules if securelevel raised */
+ if (securelevel > 0) {
+ vput(vp);
+ return EPERM;
+ }
+ /* Only load modules for root (very important!) */
+ if (error = suser(p->p_ucred, &p->p_acflag)) {
+ vput(vp);
+ return error;
+ }
+ error = linker_load_file(fstypename, &lf);
+ if (error || lf == NULL) {
+ vput(vp);
+ if (lf == NULL)
+ error = ENODEV;
+ return error;
+ }
+ lf->userrefs++;
+ /* lookup again, see if the VFS was loaded */
+ for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
+ if (!strcmp(vfsp->vfc_name, fstypename))
+ break;
+ if (vfsp == NULL) {
+ lf->userrefs--;
+ linker_file_unload(lf);
+ vput(vp);
+ return (ENODEV);
+ }
+ }
+ simple_lock(&vp->v_interlock);
+ if ((vp->v_flag & VMOUNT) != 0 ||
+ vp->v_mountedhere != NULL) {
+ simple_unlock(&vp->v_interlock);
+ vput(vp);
+ return (EBUSY);
+ }
+ vp->v_flag |= VMOUNT;
+ simple_unlock(&vp->v_interlock);
+
+ /*
+ * Allocate and initialize the filesystem.
+ */
+ mp = (struct mount *)malloc((u_long)sizeof(struct mount),
+ M_MOUNT, M_WAITOK);
+ bzero((char *)mp, (u_long)sizeof(struct mount));
+ lockinit(&mp->mnt_lock, PVFS, "vfslock", 0, LK_NOPAUSE);
+ (void)vfs_busy(mp, LK_NOWAIT, 0, p);
+ mp->mnt_op = vfsp->vfc_vfsops;
+ mp->mnt_vfc = vfsp;
+ vfsp->vfc_refcount++;
+ mp->mnt_stat.f_type = vfsp->vfc_typenum;
+ mp->mnt_flag |= vfsp->vfc_flags & MNT_VISFLAGMASK;
+ strncpy(mp->mnt_stat.f_fstypename, vfsp->vfc_name, MFSNAMELEN);
+ mp->mnt_vnodecovered = vp;
+ mp->mnt_stat.f_owner = p->p_ucred->cr_uid;
+ VOP_UNLOCK(vp, 0, p);
+update:
+ /*
+ * Set the mount level flags.
+ */
+ if (SCARG(uap, flags) & MNT_RDONLY)
+ mp->mnt_flag |= MNT_RDONLY;
+ else if (mp->mnt_flag & MNT_RDONLY)
+ mp->mnt_kern_flag |= MNTK_WANTRDWR;
+ mp->mnt_flag &=~ (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |
+ MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOATIME |
+ MNT_NOSYMFOLLOW |
+ MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR);
+ mp->mnt_flag |= SCARG(uap, flags) & (MNT_NOSUID | MNT_NOEXEC |
+ MNT_NODEV | MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_FORCE |
+ MNT_NOSYMFOLLOW |
+ MNT_NOATIME | MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR);
+ /*
+ * Mount the filesystem.
+ */
+ error = VFS_MOUNT(mp, SCARG(uap, path), SCARG(uap, data), &nd, p);
+ if (mp->mnt_flag & MNT_UPDATE) {
+ vrele(vp);
+ if (mp->mnt_kern_flag & MNTK_WANTRDWR)
+ mp->mnt_flag &= ~MNT_RDONLY;
+ mp->mnt_flag &=~ (MNT_UPDATE | MNT_RELOAD | MNT_FORCE);
+ mp->mnt_kern_flag &=~ MNTK_WANTRDWR;
+ if (error) {
+ mp->mnt_flag = flag;
+ mp->mnt_kern_flag = flag2;
+ }
+ if ((mp->mnt_flag & MNT_RDONLY) == 0) {
+ if (mp->mnt_syncer == NULL)
+ error = vfs_allocate_syncvnode(mp);
+ } else {
+ if (mp->mnt_syncer != NULL)
+ vrele(mp->mnt_syncer);
+ mp->mnt_syncer = NULL;
+ }
+ vfs_unbusy(mp, p);
+ return (error);
+ }
+ vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
+ /*
+ * Put the new filesystem on the mount list after root.
+ */
+ cache_purge(vp);
+ if (!error) {
+ simple_lock(&vp->v_interlock);
+ vp->v_flag &= ~VMOUNT;
+ vp->v_mountedhere = mp;
+ simple_unlock(&vp->v_interlock);
+ simple_lock(&mountlist_slock);
+ CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
+ simple_unlock(&mountlist_slock);
+ checkdirs(vp);
+ VOP_UNLOCK(vp, 0, p);
+ if ((mp->mnt_flag & MNT_RDONLY) == 0)
+ error = vfs_allocate_syncvnode(mp);
+ vfs_unbusy(mp, p);
+ if (error = VFS_START(mp, 0, p))
+ vrele(vp);
+ } else {
+ simple_lock(&vp->v_interlock);
+ vp->v_flag &= ~VMOUNT;
+ simple_unlock(&vp->v_interlock);
+ mp->mnt_vfc->vfc_refcount--;
+ vfs_unbusy(mp, p);
+ free((caddr_t)mp, M_MOUNT);
+ vput(vp);
+ }
+ return (error);
+}
+
+/*
+ * Scan all active processes to see if any of them have a current
+ * or root directory onto which the new filesystem has just been
+ * mounted. If so, replace them with the new mount point.
+ */
+static void
+checkdirs(olddp)
+ struct vnode *olddp;
+{
+ struct filedesc *fdp;
+ struct vnode *newdp;
+ struct proc *p;
+
+ if (olddp->v_usecount == 1)
+ return;
+ if (VFS_ROOT(olddp->v_mountedhere, &newdp))
+ 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))
+ 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->p_ucred, &p->p_acflag))) {
+ 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);
+}
+
+/*
+ * 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;
+
+ NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
+ if (error = namei(&nd))
+ 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))
+ 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 (p->p_ucred->cr_uid != 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))
+ 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 (p->p_ucred->cr_uid != 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))
+ 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))
+ 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)
+ struct proc *p;
+ struct chroot_args /* {
+ syscallarg(char *) path;
+ } */ *uap;
+{
+ 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,
+ SCARG(uap, path), p);
+ if (error = change_dir(&nd, p))
+ 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)) {
+ (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;
+
+ error = suser(p->p_ucred, &p->p_acflag);
+ if (error)
+ return (error);
+ NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
+ if (error = namei(&nd))
+ return (error);
+ vp = nd.ni_vp;
+ if (vp != NULL)
+ error = EEXIST;
+ 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))
+ 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))
+ 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))
+ goto out;
+ NDINIT(&nd, CREATE, LOCKPARENT|NOOBJ, UIO_USERSPACE, SCARG(uap, link), p);
+ if (error = namei(&nd))
+ 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))
+ 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))
+ 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))
+ 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))
+ 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))
+ 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))
+ 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))
+ 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))
+ 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))
+ 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))
+ 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))
+ 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))
+ 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))
+ 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))
+ 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))
+ 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))
+ 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))
+ 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))
+ 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))
+ 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)))
+ return (error);
+ NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
+ if (error = namei(&nd))
+ 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)))
+ return (error);
+ NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
+ if (error = namei(&nd))
+ 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)))
+ return (error);
+
+ if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
+ 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))
+ 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))
+ 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))
+ 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))
+ 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)) {
+ /* 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))
+ 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))
+ 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))
+ 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 (union_dircheckp && SCARG(uap, count) == auio.uio_resid) {
+ error = union_dircheckp(p, &vp, fp);
+ if (error == -1)
+ goto unionread;
+ if (error)
+ return (error);
+ }
+ 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))
+ 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 (union_dircheckp && SCARG(uap, count) == auio.uio_resid) {
+ error = union_dircheckp(p, &vp, fp);
+ if (error == -1)
+ goto unionread;
+ if (error)
+ return (error);
+ }
+ 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))
+ return (error);
+ vp = nd.ni_vp;
+ if (error = VOP_GETATTR(vp, &vattr, p->p_ucred, p))
+ goto out;
+ if (p->p_ucred->cr_uid != vattr.va_uid &&
+ (error = suser(p->p_ucred, &p->p_acflag)))
+ goto out;
+ if (vp->v_usecount > 1 || (vp->v_flag & VALIASED))
+ 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
+#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);
+}
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