b6d1d4db02
callers and appropriate routines to cope. This makes fo_stat more consistent with rest of fileops routines and also makes the fo_stat match FreeBSD as an added bonus. Discussed with Luke Mewburn on tech-kern@.
230 lines
6.1 KiB
C
230 lines
6.1 KiB
C
/* $NetBSD: vfs_syscalls_12.c,v 1.8 2001/04/09 10:22:01 jdolecek Exp $ */
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/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* From: @(#)vfs_syscalls.c 8.28 (Berkeley) 12/10/94
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/namei.h>
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#include <sys/filedesc.h>
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#include <sys/kernel.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/socketvar.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/uio.h>
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#include <sys/malloc.h>
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#include <sys/dirent.h>
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#include <sys/syscallargs.h>
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static void cvtstat __P((struct stat *, struct stat12 *));
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/*
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* Convert from a new to an old stat structure.
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*/
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static void
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cvtstat(st, ost)
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struct stat *st;
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struct stat12 *ost;
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{
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ost->st_dev = st->st_dev;
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ost->st_ino = st->st_ino;
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ost->st_mode = st->st_mode & 0xffff;
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if (st->st_nlink >= (1 << 15))
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ost->st_nlink = (1 << 15) - 1;
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else
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ost->st_nlink = st->st_nlink;
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ost->st_uid = st->st_uid;
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ost->st_gid = st->st_gid;
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ost->st_rdev = st->st_rdev;
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ost->st_atimespec = st->st_atimespec;
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ost->st_mtimespec = st->st_mtimespec;
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ost->st_ctimespec = st->st_ctimespec;
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ost->st_size = st->st_size;
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ost->st_blocks = st->st_blocks;
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ost->st_blksize = st->st_blksize;
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ost->st_flags = st->st_flags;
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ost->st_gen = st->st_gen;
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}
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/*
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* Read a block of directory entries in a file system independent format.
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*/
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int
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compat_12_sys_getdirentries(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct compat_12_sys_getdirentries_args /* {
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syscallarg(int) fd;
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syscallarg(char *) buf;
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syscallarg(u_int) count;
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syscallarg(long *) basep;
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} */ *uap = v;
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struct file *fp;
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int error, done;
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long loff;
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/* getvnode() will use the descriptor for us */
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if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
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return error;
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if ((fp->f_flag & FREAD) == 0) {
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error = EBADF;
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goto out;
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}
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loff = fp->f_offset;
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error = vn_readdir(fp, SCARG(uap, buf), UIO_USERSPACE,
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SCARG(uap, count), &done, p, 0, 0);
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error = copyout(&loff, SCARG(uap, basep), sizeof(long));
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*retval = done;
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out:
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FILE_UNUSE(fp, p);
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return error;
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}
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/*
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* Get file status; this version follows links.
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*/
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/* ARGSUSED */
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int
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compat_12_sys_stat(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct compat_12_sys_stat_args /* {
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syscallarg(const char *) path;
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syscallarg(struct stat12 *) ub;
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} */ *uap = v;
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struct stat sb;
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struct stat12 osb;
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int error;
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struct nameidata nd;
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NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
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SCARG(uap, path), p);
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if ((error = namei(&nd)) != 0)
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return (error);
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error = vn_stat(nd.ni_vp, &sb, p);
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vput(nd.ni_vp);
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if (error)
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return (error);
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cvtstat(&sb, &osb);
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error = copyout(&osb, SCARG(uap, ub), sizeof (osb));
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return (error);
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}
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/*
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* Get file status; this version does not follow links.
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*/
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/* ARGSUSED */
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int
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compat_12_sys_lstat(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct compat_12_sys_lstat_args /* {
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syscallarg(const char *) path;
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syscallarg(struct stat12 *) ub;
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} */ *uap = v;
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struct stat sb;
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struct stat12 osb;
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int error;
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struct nameidata nd;
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NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE,
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SCARG(uap, path), p);
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if ((error = namei(&nd)) != 0)
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return (error);
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error = vn_stat(nd.ni_vp, &sb, p);
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vput(nd.ni_vp);
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if (error)
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return (error);
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cvtstat(&sb, &osb);
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error = copyout(&osb, SCARG(uap, ub), sizeof (osb));
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return (error);
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}
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/*
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* Return status information about a file descriptor.
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*/
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/* ARGSUSED */
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int
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compat_12_sys_fstat(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct compat_12_sys_fstat_args /* {
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syscallarg(int) fd;
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syscallarg(struct stat12 *) sb;
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} */ *uap = v;
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int fd = SCARG(uap, fd);
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struct filedesc *fdp = p->p_fd;
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struct file *fp;
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struct stat ub;
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struct stat12 oub;
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int error;
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if ((u_int)fd >= fdp->fd_nfiles ||
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(fp = fdp->fd_ofiles[fd]) == NULL)
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return (EBADF);
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FILE_USE(fp);
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error = (*fp->f_ops->fo_stat)(fp, &ub, p);
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FILE_UNUSE(fp, p);
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if (error == 0) {
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cvtstat(&ub, &oub);
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error = copyout(&oub, SCARG(uap, sb), sizeof (oub));
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}
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return (error);
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}
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