NetBSD/sys/compat/common/vfs_syscalls_12.c

230 lines
6.1 KiB
C

/* $NetBSD: vfs_syscalls_12.c,v 1.8 2001/04/09 10:22:01 jdolecek Exp $ */
/*
* 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.
*
* From: @(#)vfs_syscalls.c 8.28 (Berkeley) 12/10/94
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/filedesc.h>
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/socketvar.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/dirent.h>
#include <sys/syscallargs.h>
static void cvtstat __P((struct stat *, struct stat12 *));
/*
* Convert from a new to an old stat structure.
*/
static void
cvtstat(st, ost)
struct stat *st;
struct stat12 *ost;
{
ost->st_dev = st->st_dev;
ost->st_ino = st->st_ino;
ost->st_mode = st->st_mode & 0xffff;
if (st->st_nlink >= (1 << 15))
ost->st_nlink = (1 << 15) - 1;
else
ost->st_nlink = st->st_nlink;
ost->st_uid = st->st_uid;
ost->st_gid = st->st_gid;
ost->st_rdev = st->st_rdev;
ost->st_atimespec = st->st_atimespec;
ost->st_mtimespec = st->st_mtimespec;
ost->st_ctimespec = st->st_ctimespec;
ost->st_size = st->st_size;
ost->st_blocks = st->st_blocks;
ost->st_blksize = st->st_blksize;
ost->st_flags = st->st_flags;
ost->st_gen = st->st_gen;
}
/*
* Read a block of directory entries in a file system independent format.
*/
int
compat_12_sys_getdirentries(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct compat_12_sys_getdirentries_args /* {
syscallarg(int) fd;
syscallarg(char *) buf;
syscallarg(u_int) count;
syscallarg(long *) basep;
} */ *uap = v;
struct file *fp;
int error, done;
long loff;
/* getvnode() will use the descriptor for us */
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
return error;
if ((fp->f_flag & FREAD) == 0) {
error = EBADF;
goto out;
}
loff = fp->f_offset;
error = vn_readdir(fp, SCARG(uap, buf), UIO_USERSPACE,
SCARG(uap, count), &done, p, 0, 0);
error = copyout(&loff, SCARG(uap, basep), sizeof(long));
*retval = done;
out:
FILE_UNUSE(fp, p);
return error;
}
/*
* Get file status; this version follows links.
*/
/* ARGSUSED */
int
compat_12_sys_stat(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct compat_12_sys_stat_args /* {
syscallarg(const char *) path;
syscallarg(struct stat12 *) ub;
} */ *uap = v;
struct stat sb;
struct stat12 osb;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
return (error);
error = vn_stat(nd.ni_vp, &sb, p);
vput(nd.ni_vp);
if (error)
return (error);
cvtstat(&sb, &osb);
error = copyout(&osb, SCARG(uap, ub), sizeof (osb));
return (error);
}
/*
* Get file status; this version does not follow links.
*/
/* ARGSUSED */
int
compat_12_sys_lstat(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct compat_12_sys_lstat_args /* {
syscallarg(const char *) path;
syscallarg(struct stat12 *) ub;
} */ *uap = v;
struct stat sb;
struct stat12 osb;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE,
SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
return (error);
error = vn_stat(nd.ni_vp, &sb, p);
vput(nd.ni_vp);
if (error)
return (error);
cvtstat(&sb, &osb);
error = copyout(&osb, SCARG(uap, ub), sizeof (osb));
return (error);
}
/*
* Return status information about a file descriptor.
*/
/* ARGSUSED */
int
compat_12_sys_fstat(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct compat_12_sys_fstat_args /* {
syscallarg(int) fd;
syscallarg(struct stat12 *) sb;
} */ *uap = v;
int fd = SCARG(uap, fd);
struct filedesc *fdp = p->p_fd;
struct file *fp;
struct stat ub;
struct stat12 oub;
int error;
if ((u_int)fd >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[fd]) == NULL)
return (EBADF);
FILE_USE(fp);
error = (*fp->f_ops->fo_stat)(fp, &ub, p);
FILE_UNUSE(fp, p);
if (error == 0) {
cvtstat(&ub, &oub);
error = copyout(&oub, SCARG(uap, sb), sizeof (oub));
}
return (error);
}