root / prex-0.9.0 / usr / server / fs / vfs / vfs_syscalls.c @ 03e9c04a
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/*
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* Copyright (c) 2005-2007, Kohsuke Ohtani
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* vfs_syscalls.c - everything in this file is a routine implementing
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* a VFS system call.
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*/
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#include <sys/prex.h> |
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#include <sys/stat.h> |
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#include <sys/vnode.h> |
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#include <sys/file.h> |
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#include <sys/mount.h> |
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#include <sys/dirent.h> |
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#include <sys/list.h> |
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#include <sys/buf.h> |
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|
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#include <limits.h> |
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#include <unistd.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <stdio.h> |
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#include <errno.h> |
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#include <fcntl.h> |
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|
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#include "vfs.h" |
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|
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int
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sys_open(char *path, int flags, mode_t mode, file_t *pfp) |
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{
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vnode_t vp, dvp; |
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file_t fp; |
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char *filename;
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int error;
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DPRINTF(VFSDB_SYSCALL, ("sys_open: path=%s flags=%x mode=%x\n",
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path, flags, mode)); |
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|
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flags = FFLAGS(flags); |
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if ((flags & (FREAD | FWRITE)) == 0) |
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return EINVAL;
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if (flags & O_CREAT) {
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error = namei(path, &vp); |
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if (error == ENOENT) {
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/* Create new file. */
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if ((error = lookup(path, &dvp, &filename)) != 0) |
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return error;
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if ((error = vn_access(dvp, VWRITE)) != 0) { |
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vput(dvp); |
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return error;
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} |
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mode &= ~S_IFMT; |
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mode |= S_IFREG; |
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error = VOP_CREATE(dvp, filename, mode); |
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vput(dvp); |
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if (error)
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return error;
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if ((error = namei(path, &vp)) != 0) |
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return error;
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flags &= ~O_TRUNC; |
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} else if (error) { |
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return error;
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} else {
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/* File already exits */
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if (flags & O_EXCL) {
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vput(vp); |
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return EEXIST;
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} |
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flags &= ~O_CREAT; |
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} |
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} else {
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/* Open */
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if ((error = namei(path, &vp)) != 0) |
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return error;
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} |
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if ((flags & O_CREAT) == 0) { |
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if (flags & FWRITE || flags & O_TRUNC) {
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if ((error = vn_access(vp, VWRITE)) != 0) { |
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vput(vp); |
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return error;
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} |
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if (vp->v_type == VDIR) {
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/* Openning directory with writable. */
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vput(vp); |
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return EISDIR;
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} |
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} |
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} |
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/* Process truncate request */
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if (flags & O_TRUNC) {
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if (!(flags & FWRITE) || (vp->v_type == VDIR)) {
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vput(vp); |
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return EINVAL;
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} |
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if ((error = VOP_TRUNCATE(vp, 0)) != 0) { |
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vput(vp); |
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return error;
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} |
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} |
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/* Setup file structure */
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if (!(fp = malloc(sizeof(struct file)))) { |
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vput(vp); |
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return ENOMEM;
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} |
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/* Request to file system */
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if ((error = VOP_OPEN(vp, flags)) != 0) { |
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free(fp); |
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vput(vp); |
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return error;
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} |
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memset(fp, 0, sizeof(struct file)); |
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fp->f_vnode = vp; |
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fp->f_flags = flags; |
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fp->f_offset = 0;
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fp->f_count = 1;
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*pfp = fp; |
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vn_unlock(vp); |
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return 0; |
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} |
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int
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sys_close(file_t fp) |
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{
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vnode_t vp; |
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int error;
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DPRINTF(VFSDB_SYSCALL, ("sys_close: fp=%x count=%d\n",
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(u_int)fp, fp->f_count)); |
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if (fp->f_count <= 0) |
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sys_panic("sys_close");
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vp = fp->f_vnode; |
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if (--fp->f_count > 0) { |
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vrele(vp); |
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return 0; |
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} |
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vn_lock(vp); |
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if ((error = VOP_CLOSE(vp, fp)) != 0) { |
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vn_unlock(vp); |
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return error;
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} |
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vput(vp); |
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free(fp); |
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return 0; |
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} |
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int
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sys_read(file_t fp, void *buf, size_t size, size_t *count)
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{
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vnode_t vp; |
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int error;
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DPRINTF(VFSDB_SYSCALL, ("sys_read: fp=%x buf=%x size=%d\n",
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(u_int)fp, (u_int)buf, size)); |
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if ((fp->f_flags & FREAD) == 0) |
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return EBADF;
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if (size == 0) { |
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*count = 0;
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return 0; |
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} |
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vp = fp->f_vnode; |
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vn_lock(vp); |
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error = VOP_READ(vp, fp, buf, size, count); |
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vn_unlock(vp); |
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return error;
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} |
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|
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int
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sys_write(file_t fp, void *buf, size_t size, size_t *count)
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{
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vnode_t vp; |
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int error;
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DPRINTF(VFSDB_SYSCALL, ("sys_write: fp=%x buf=%x size=%d\n",
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(u_int)fp, (u_int)buf, size)); |
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if ((fp->f_flags & FWRITE) == 0) |
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return EBADF;
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if (size == 0) { |
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*count = 0;
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return 0; |
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} |
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vp = fp->f_vnode; |
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vn_lock(vp); |
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error = VOP_WRITE(vp, fp, buf, size, count); |
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vn_unlock(vp); |
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return error;
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} |
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|
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int
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sys_lseek(file_t fp, off_t off, int type, off_t *origin)
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{
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vnode_t vp; |
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DPRINTF(VFSDB_SYSCALL, ("sys_seek: fp=%x off=%d type=%d\n",
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(u_int)fp, (u_int)off, type)); |
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vp = fp->f_vnode; |
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vn_lock(vp); |
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switch (type) {
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case SEEK_SET:
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if (off < 0) |
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off = 0;
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if (off > (off_t)vp->v_size)
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off = vp->v_size; |
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break;
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case SEEK_CUR:
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if (fp->f_offset + off > (off_t)vp->v_size)
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off = vp->v_size; |
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else if (fp->f_offset + off < 0) |
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off = 0;
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else
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off = fp->f_offset + off; |
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break;
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case SEEK_END:
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if (off > 0) |
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off = vp->v_size; |
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else if ((int)vp->v_size + off < 0) |
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off = 0;
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else
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off = vp->v_size + off; |
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break;
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default:
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vn_unlock(vp); |
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return EINVAL;
|
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} |
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/* Request to check the file offset */
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if (VOP_SEEK(vp, fp, fp->f_offset, off) != 0) { |
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vn_unlock(vp); |
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return EINVAL;
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} |
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*origin = off; |
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fp->f_offset = off; |
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vn_unlock(vp); |
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return 0; |
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} |
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|
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int
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sys_ioctl(file_t fp, u_long request, void *buf)
|
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{
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vnode_t vp; |
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int error;
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DPRINTF(VFSDB_SYSCALL, ("sys_ioctl: fp=%x request=%x\n", fp, request));
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if ((fp->f_flags & (FREAD | FWRITE)) == 0) |
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return EBADF;
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vp = fp->f_vnode; |
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vn_lock(vp); |
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error = VOP_IOCTL(vp, fp, request, buf); |
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vn_unlock(vp); |
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DPRINTF(VFSDB_SYSCALL, ("sys_ioctl: comp error=%d\n", error));
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return error;
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} |
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|
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int
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sys_fsync(file_t fp) |
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{
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vnode_t vp; |
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int error;
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|
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DPRINTF(VFSDB_SYSCALL, ("sys_fsync: fp=%x\n", fp));
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|
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if ((fp->f_flags & FWRITE) == 0) |
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return EBADF;
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|
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vp = fp->f_vnode; |
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vn_lock(vp); |
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error = VOP_FSYNC(vp, fp); |
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vn_unlock(vp); |
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return error;
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} |
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|
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int
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sys_fstat(file_t fp, struct stat *st)
|
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{
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vnode_t vp; |
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int error = 0; |
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|
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DPRINTF(VFSDB_SYSCALL, ("sys_fstat: fp=%x\n", fp));
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|
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vp = fp->f_vnode; |
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vn_lock(vp); |
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error = vn_stat(vp, st); |
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vn_unlock(vp); |
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return error;
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} |
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|
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/*
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* Return 0 if directory is empty
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*/
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static int |
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check_dir_empty(char *path)
|
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{
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int error;
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file_t fp; |
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struct dirent dir;
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DPRINTF(VFSDB_SYSCALL, ("check_dir_empty\n"));
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|
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if ((error = sys_opendir(path, &fp)) != 0) |
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return error;
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do {
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error = sys_readdir(fp, &dir); |
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if (error != 0 && error != EACCES) |
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break;
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} while (!strcmp(dir.d_name, ".") || !strcmp(dir.d_name, "..")); |
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|
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sys_closedir(fp); |
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|
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if (error == ENOENT)
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return 0; |
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else if (error == 0) |
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return EEXIST;
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return error;
|
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} |
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|
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int
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sys_opendir(char *path, file_t *file)
|
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{
|
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vnode_t dvp; |
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file_t fp; |
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int error;
|
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|
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DPRINTF(VFSDB_SYSCALL, ("sys_opendir: path=%s\n", path));
|
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|
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if ((error = sys_open(path, O_RDONLY, 0, &fp)) != 0) |
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return error;
|
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|
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dvp = fp->f_vnode; |
| 360 |
vn_lock(dvp); |
| 361 |
if (dvp->v_type != VDIR) {
|
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vn_unlock(dvp); |
| 363 |
sys_close(fp); |
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return ENOTDIR;
|
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} |
| 366 |
vn_unlock(dvp); |
| 367 |
|
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*file = fp; |
| 369 |
return 0; |
| 370 |
} |
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|
| 372 |
int
|
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sys_closedir(file_t fp) |
| 374 |
{
|
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vnode_t dvp; |
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int error;
|
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|
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DPRINTF(VFSDB_SYSCALL, ("sys_closedir: fp=%x\n", fp));
|
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|
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dvp = fp->f_vnode; |
| 381 |
vn_lock(dvp); |
| 382 |
if (dvp->v_type != VDIR) {
|
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vn_unlock(dvp); |
| 384 |
return EBADF;
|
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} |
| 386 |
vn_unlock(dvp); |
| 387 |
error = sys_close(fp); |
| 388 |
return error;
|
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} |
| 390 |
|
| 391 |
int
|
| 392 |
sys_readdir(file_t fp, struct dirent *dir)
|
| 393 |
{
|
| 394 |
vnode_t dvp; |
| 395 |
int error;
|
| 396 |
|
| 397 |
DPRINTF(VFSDB_SYSCALL, ("sys_readdir: fp=%x\n", fp));
|
| 398 |
|
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dvp = fp->f_vnode; |
| 400 |
vn_lock(dvp); |
| 401 |
if (dvp->v_type != VDIR) {
|
| 402 |
vn_unlock(dvp); |
| 403 |
return EBADF;
|
| 404 |
} |
| 405 |
error = VOP_READDIR(dvp, fp, dir); |
| 406 |
DPRINTF(VFSDB_SYSCALL, ("sys_readdir: error=%d path=%s\n",
|
| 407 |
error, dir->d_name)); |
| 408 |
vn_unlock(dvp); |
| 409 |
return error;
|
| 410 |
} |
| 411 |
|
| 412 |
int
|
| 413 |
sys_rewinddir(file_t fp) |
| 414 |
{
|
| 415 |
vnode_t dvp; |
| 416 |
|
| 417 |
dvp = fp->f_vnode; |
| 418 |
vn_lock(dvp); |
| 419 |
if (dvp->v_type != VDIR) {
|
| 420 |
vn_unlock(dvp); |
| 421 |
return EBADF;
|
| 422 |
} |
| 423 |
fp->f_offset = 0;
|
| 424 |
vn_unlock(dvp); |
| 425 |
return 0; |
| 426 |
} |
| 427 |
|
| 428 |
int
|
| 429 |
sys_seekdir(file_t fp, long loc)
|
| 430 |
{
|
| 431 |
vnode_t dvp; |
| 432 |
|
| 433 |
dvp = fp->f_vnode; |
| 434 |
vn_lock(dvp); |
| 435 |
if (dvp->v_type != VDIR) {
|
| 436 |
vn_unlock(dvp); |
| 437 |
return EBADF;
|
| 438 |
} |
| 439 |
fp->f_offset = (off_t)loc; |
| 440 |
vn_unlock(dvp); |
| 441 |
return 0; |
| 442 |
} |
| 443 |
|
| 444 |
int
|
| 445 |
sys_telldir(file_t fp, long *loc)
|
| 446 |
{
|
| 447 |
vnode_t dvp; |
| 448 |
|
| 449 |
dvp = fp->f_vnode; |
| 450 |
vn_lock(dvp); |
| 451 |
if (dvp->v_type != VDIR) {
|
| 452 |
vn_unlock(dvp); |
| 453 |
return EBADF;
|
| 454 |
} |
| 455 |
*loc = (long)fp->f_offset;
|
| 456 |
vn_unlock(dvp); |
| 457 |
return 0; |
| 458 |
} |
| 459 |
|
| 460 |
int
|
| 461 |
sys_mkdir(char *path, mode_t mode)
|
| 462 |
{
|
| 463 |
char *name;
|
| 464 |
vnode_t vp, dvp; |
| 465 |
int error;
|
| 466 |
|
| 467 |
DPRINTF(VFSDB_SYSCALL, ("sys_mkdir: path=%s mode=%d\n", path, mode));
|
| 468 |
|
| 469 |
if ((error = namei(path, &vp)) == 0) { |
| 470 |
/* File already exists */
|
| 471 |
vput(vp); |
| 472 |
return EEXIST;
|
| 473 |
} |
| 474 |
/* Notice: vp is invalid here! */
|
| 475 |
|
| 476 |
if ((error = lookup(path, &dvp, &name)) != 0) { |
| 477 |
/* Directory already exists */
|
| 478 |
return error;
|
| 479 |
} |
| 480 |
if ((error = vn_access(dvp, VWRITE)) != 0) |
| 481 |
goto out;
|
| 482 |
mode &= ~S_IFMT; |
| 483 |
mode |= S_IFDIR; |
| 484 |
|
| 485 |
error = VOP_MKDIR(dvp, name, mode); |
| 486 |
out:
|
| 487 |
vput(dvp); |
| 488 |
return error;
|
| 489 |
} |
| 490 |
|
| 491 |
int
|
| 492 |
sys_rmdir(char *path)
|
| 493 |
{
|
| 494 |
vnode_t vp, dvp; |
| 495 |
int error;
|
| 496 |
char *name;
|
| 497 |
|
| 498 |
DPRINTF(VFSDB_SYSCALL, ("sys_rmdir: path=%s\n", path));
|
| 499 |
|
| 500 |
if ((error = check_dir_empty(path)) != 0) |
| 501 |
return error;
|
| 502 |
if ((error = namei(path, &vp)) != 0) |
| 503 |
return error;
|
| 504 |
if ((error = vn_access(vp, VWRITE)) != 0) |
| 505 |
goto out;
|
| 506 |
if (vp->v_type != VDIR) {
|
| 507 |
error = ENOTDIR; |
| 508 |
goto out;
|
| 509 |
} |
| 510 |
if (vp->v_flags & VROOT || vcount(vp) >= 2) { |
| 511 |
error = EBUSY; |
| 512 |
goto out;
|
| 513 |
} |
| 514 |
if ((error = lookup(path, &dvp, &name)) != 0) |
| 515 |
goto out;
|
| 516 |
|
| 517 |
error = VOP_RMDIR(dvp, vp, name); |
| 518 |
vn_unlock(vp); |
| 519 |
vgone(vp); |
| 520 |
vput(dvp); |
| 521 |
return error;
|
| 522 |
|
| 523 |
out:
|
| 524 |
vput(vp); |
| 525 |
return error;
|
| 526 |
} |
| 527 |
|
| 528 |
int
|
| 529 |
sys_mknod(char *path, mode_t mode)
|
| 530 |
{
|
| 531 |
char *name;
|
| 532 |
vnode_t vp, dvp; |
| 533 |
int error;
|
| 534 |
|
| 535 |
DPRINTF(VFSDB_SYSCALL, ("sys_mknod: path=%s mode=%d\n", path, mode));
|
| 536 |
|
| 537 |
switch (mode & S_IFMT) {
|
| 538 |
case S_IFREG:
|
| 539 |
case S_IFDIR:
|
| 540 |
case S_IFIFO:
|
| 541 |
case S_IFSOCK:
|
| 542 |
/* OK */
|
| 543 |
break;
|
| 544 |
default:
|
| 545 |
return EINVAL;
|
| 546 |
} |
| 547 |
|
| 548 |
if ((error = namei(path, &vp)) == 0) { |
| 549 |
vput(vp); |
| 550 |
return EEXIST;
|
| 551 |
} |
| 552 |
|
| 553 |
if ((error = lookup(path, &dvp, &name)) != 0) |
| 554 |
return error;
|
| 555 |
if ((error = vn_access(dvp, VWRITE)) != 0) |
| 556 |
goto out;
|
| 557 |
if (S_ISDIR(mode))
|
| 558 |
error = VOP_MKDIR(dvp, name, mode); |
| 559 |
else
|
| 560 |
error = VOP_CREATE(dvp, name, mode); |
| 561 |
out:
|
| 562 |
vput(dvp); |
| 563 |
return error;
|
| 564 |
} |
| 565 |
|
| 566 |
int
|
| 567 |
sys_rename(char *src, char *dest) |
| 568 |
{
|
| 569 |
vnode_t vp1, vp2 = 0, dvp1, dvp2;
|
| 570 |
char *sname, *dname;
|
| 571 |
int error;
|
| 572 |
size_t len; |
| 573 |
char root[] = "/"; |
| 574 |
|
| 575 |
DPRINTF(VFSDB_SYSCALL, ("sys_rename: src=%s dest=%s\n", src, dest));
|
| 576 |
|
| 577 |
if ((error = namei(src, &vp1)) != 0) |
| 578 |
return error;
|
| 579 |
if ((error = vn_access(vp1, VWRITE)) != 0) |
| 580 |
goto err1;
|
| 581 |
|
| 582 |
/* If source and dest are the same, do nothing */
|
| 583 |
if (!strncmp(src, dest, PATH_MAX))
|
| 584 |
goto err1;
|
| 585 |
|
| 586 |
/* Check if target is directory of source */
|
| 587 |
len = strlen(dest); |
| 588 |
if (!strncmp(src, dest, len)) {
|
| 589 |
error = EINVAL; |
| 590 |
goto err1;
|
| 591 |
} |
| 592 |
/* Is the source busy ? */
|
| 593 |
if (vcount(vp1) >= 2) { |
| 594 |
error = EBUSY; |
| 595 |
goto err1;
|
| 596 |
} |
| 597 |
/* Check type of source & target */
|
| 598 |
error = namei(dest, &vp2); |
| 599 |
if (error == 0) { |
| 600 |
/* target exists */
|
| 601 |
if (vp1->v_type == VDIR && vp2->v_type != VDIR) {
|
| 602 |
error = ENOTDIR; |
| 603 |
goto err2;
|
| 604 |
} else if (vp1->v_type != VDIR && vp2->v_type == VDIR) { |
| 605 |
error = EISDIR; |
| 606 |
goto err2;
|
| 607 |
} |
| 608 |
if (vp2->v_type == VDIR && check_dir_empty(dest)) {
|
| 609 |
error = EEXIST; |
| 610 |
goto err2;
|
| 611 |
} |
| 612 |
|
| 613 |
if (vcount(vp2) >= 2) { |
| 614 |
error = EBUSY; |
| 615 |
goto err2;
|
| 616 |
} |
| 617 |
} |
| 618 |
|
| 619 |
dname = strrchr(dest, '/');
|
| 620 |
if (dname == NULL) { |
| 621 |
error = ENOTDIR; |
| 622 |
goto err2;
|
| 623 |
} |
| 624 |
if (dname == dest)
|
| 625 |
dest = root; |
| 626 |
|
| 627 |
*dname = 0;
|
| 628 |
dname++; |
| 629 |
|
| 630 |
if ((error = lookup(src, &dvp1, &sname)) != 0) |
| 631 |
goto err2;
|
| 632 |
|
| 633 |
if ((error = namei(dest, &dvp2)) != 0) |
| 634 |
goto err3;
|
| 635 |
|
| 636 |
/* The source and dest must be same file system */
|
| 637 |
if (dvp1->v_mount != dvp2->v_mount) {
|
| 638 |
error = EXDEV; |
| 639 |
goto err4;
|
| 640 |
} |
| 641 |
error = VOP_RENAME(dvp1, vp1, sname, dvp2, vp2, dname); |
| 642 |
err4:
|
| 643 |
vput(dvp2); |
| 644 |
err3:
|
| 645 |
vput(dvp1); |
| 646 |
err2:
|
| 647 |
if (vp2)
|
| 648 |
vput(vp2); |
| 649 |
err1:
|
| 650 |
vput(vp1); |
| 651 |
return error;
|
| 652 |
} |
| 653 |
|
| 654 |
int
|
| 655 |
sys_unlink(char *path)
|
| 656 |
{
|
| 657 |
char *name;
|
| 658 |
vnode_t vp, dvp; |
| 659 |
int error;
|
| 660 |
|
| 661 |
DPRINTF(VFSDB_SYSCALL, ("sys_unlink: path=%s\n", path));
|
| 662 |
|
| 663 |
if ((error = namei(path, &vp)) != 0) |
| 664 |
return error;
|
| 665 |
if ((error = vn_access(vp, VWRITE)) != 0) |
| 666 |
goto out;
|
| 667 |
if (vp->v_type == VDIR) {
|
| 668 |
error = EPERM; |
| 669 |
goto out;
|
| 670 |
} |
| 671 |
/* XXX: Need to allow unlink for opened file. */
|
| 672 |
if (vp->v_flags & VROOT || vcount(vp) >= 2) { |
| 673 |
error = EBUSY; |
| 674 |
goto out;
|
| 675 |
} |
| 676 |
if ((error = lookup(path, &dvp, &name)) != 0) |
| 677 |
goto out;
|
| 678 |
|
| 679 |
error = VOP_REMOVE(dvp, vp, name); |
| 680 |
|
| 681 |
vn_unlock(vp); |
| 682 |
vgone(vp); |
| 683 |
vput(dvp); |
| 684 |
return 0; |
| 685 |
out:
|
| 686 |
vput(vp); |
| 687 |
return error;
|
| 688 |
} |
| 689 |
|
| 690 |
int
|
| 691 |
sys_access(char *path, int mode) |
| 692 |
{
|
| 693 |
vnode_t vp; |
| 694 |
int error, flags;
|
| 695 |
|
| 696 |
DPRINTF(VFSDB_SYSCALL, ("sys_access: path=%s mode=%x\n", path, mode));
|
| 697 |
|
| 698 |
/* If F_OK is set, we return here if file is not found. */
|
| 699 |
if ((error = namei(path, &vp)) != 0) |
| 700 |
return error;
|
| 701 |
|
| 702 |
flags = 0;
|
| 703 |
if (mode & R_OK)
|
| 704 |
flags |= VREAD; |
| 705 |
if (mode & W_OK)
|
| 706 |
flags |= VWRITE; |
| 707 |
if (mode & X_OK)
|
| 708 |
flags |= VEXEC; |
| 709 |
|
| 710 |
error = vn_access(vp, flags); |
| 711 |
|
| 712 |
vput(vp); |
| 713 |
return error;
|
| 714 |
} |
| 715 |
|
| 716 |
int
|
| 717 |
sys_stat(char *path, struct stat *st) |
| 718 |
{
|
| 719 |
vnode_t vp; |
| 720 |
int error;
|
| 721 |
|
| 722 |
DPRINTF(VFSDB_SYSCALL, ("sys_stat: path=%s\n", path));
|
| 723 |
|
| 724 |
if ((error = namei(path, &vp)) != 0) |
| 725 |
return error;
|
| 726 |
error = vn_stat(vp, st); |
| 727 |
vput(vp); |
| 728 |
return error;
|
| 729 |
} |
| 730 |
|
| 731 |
int
|
| 732 |
sys_truncate(char *path, off_t length)
|
| 733 |
{
|
| 734 |
return 0; |
| 735 |
} |
| 736 |
|
| 737 |
int
|
| 738 |
sys_ftruncate(file_t fp, off_t length) |
| 739 |
{
|
| 740 |
return 0; |
| 741 |
} |
| 742 |
|
| 743 |
int
|
| 744 |
sys_fchdir(file_t fp, char *cwd)
|
| 745 |
{
|
| 746 |
vnode_t dvp; |
| 747 |
|
| 748 |
dvp = fp->f_vnode; |
| 749 |
vn_lock(dvp); |
| 750 |
if (dvp->v_type != VDIR) {
|
| 751 |
vn_unlock(dvp); |
| 752 |
return EBADF;
|
| 753 |
} |
| 754 |
strlcpy(cwd, dvp->v_path, PATH_MAX); |
| 755 |
vn_unlock(dvp); |
| 756 |
return 0; |
| 757 |
} |