2000-01-18 07:37:10 +00:00
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/* $FreeBSD$ */
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1998-08-20 08:19:55 +00:00
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/* $NetBSD: cd9660.c,v 1.5 1997/06/26 19:11:33 drochner Exp $ */
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/*
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* Copyright (C) 1996 Wolfgang Solfrank.
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* Copyright (C) 1996 TooLs GmbH.
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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. 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 TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Stand-alone ISO9660 file reading package.
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*
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* Note: This doesn't support Rock Ridge extensions, extended attributes,
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* blocksizes other than 2048 bytes, multi-extent files, etc.
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*/
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#include <sys/param.h>
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#include <string.h>
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2000-01-18 07:37:10 +00:00
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#include <sys/dirent.h>
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1998-08-20 08:19:55 +00:00
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#include <isofs/cd9660/iso.h>
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#include "stand.h"
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1998-09-18 22:58:01 +00:00
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static int cd9660_open(const char *path, struct open_file *f);
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1998-08-20 08:19:55 +00:00
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static int cd9660_close(struct open_file *f);
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static int cd9660_read(struct open_file *f, void *buf, size_t size, size_t *resid);
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static int cd9660_write(struct open_file *f, void *buf, size_t size, size_t *resid);
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static off_t cd9660_seek(struct open_file *f, off_t offset, int where);
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static int cd9660_stat(struct open_file *f, struct stat *sb);
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2000-04-29 20:47:10 +00:00
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static int cd9660_readdir(struct open_file *f, struct dirent *d);
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1998-08-20 08:19:55 +00:00
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struct fs_ops cd9660_fsops = {
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2000-04-29 20:47:10 +00:00
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"cd9660",
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cd9660_open,
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cd9660_close,
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cd9660_read,
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cd9660_write,
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cd9660_seek,
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cd9660_stat,
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cd9660_readdir
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1998-08-20 08:19:55 +00:00
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};
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struct file {
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2000-04-29 20:47:10 +00:00
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int f_isdir; /* nonzero if file is directory */
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off_t f_off; /* Current offset within file */
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daddr_t f_bno; /* Starting block number */
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off_t f_size; /* Size of file */
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daddr_t f_buf_blkno; /* block number of data block */
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char *f_buf; /* buffer for data block */
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1998-08-20 08:19:55 +00:00
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};
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struct ptable_ent {
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char namlen [ISODCL( 1, 1)]; /* 711 */
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char extlen [ISODCL( 2, 2)]; /* 711 */
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char block [ISODCL( 3, 6)]; /* 732 */
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char parent [ISODCL( 7, 8)]; /* 722 */
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char name [1];
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};
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#define PTFIXSZ 8
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#define PTSIZE(pp) roundup(PTFIXSZ + isonum_711((pp)->namlen), 2)
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#define cdb2devb(bno) ((bno) * ISO_DEFAULT_BLOCK_SIZE / DEV_BSIZE)
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/* XXX these should be in the system headers */
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static __inline int
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isonum_722(p)
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u_char *p;
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{
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return (*p << 8)|p[1];
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}
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static __inline int
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isonum_732(p)
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u_char *p;
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{
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return (*p << 24)|(p[1] << 16)|(p[2] << 8)|p[3];
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}
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static int
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dirmatch(path, dp)
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1998-09-18 22:58:01 +00:00
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const char *path;
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1998-08-20 08:19:55 +00:00
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struct iso_directory_record *dp;
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{
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char *cp;
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int i;
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cp = dp->name;
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for (i = isonum_711(dp->name_len); --i >= 0; path++, cp++) {
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2000-01-18 07:37:10 +00:00
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if (!*path || *path == '/')
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1998-08-20 08:19:55 +00:00
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break;
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if (toupper(*path) == *cp)
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continue;
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return 0;
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}
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2000-01-18 07:37:10 +00:00
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if (*path && *path != '/')
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1998-08-20 08:19:55 +00:00
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return 0;
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/*
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* Allow stripping of trailing dots and the version number.
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* Note that this will find the first instead of the last version
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* of a file.
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*/
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if (i >= 0 && (*cp == ';' || *cp == '.')) {
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/* This is to prevent matching of numeric extensions */
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if (*cp == '.' && cp[1] != ';')
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return 0;
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while (--i >= 0)
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if (*++cp != ';' && (*cp < '0' || *cp > '9'))
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return 0;
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}
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return 1;
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}
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static int
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cd9660_open(path, f)
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1998-09-18 22:58:01 +00:00
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const char *path;
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1998-08-20 08:19:55 +00:00
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struct open_file *f;
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{
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struct file *fp = 0;
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void *buf;
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struct iso_primary_descriptor *vd;
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2000-01-18 07:37:10 +00:00
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size_t buf_size, read, dsize, off;
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daddr_t bno, boff;
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struct iso_directory_record rec;
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1998-08-20 08:19:55 +00:00
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struct iso_directory_record *dp = 0;
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int rc;
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2000-01-18 07:43:12 +00:00
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1998-08-20 08:19:55 +00:00
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/* First find the volume descriptor */
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buf = malloc(buf_size = ISO_DEFAULT_BLOCK_SIZE);
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vd = buf;
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for (bno = 16;; bno++) {
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twiddle();
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rc = f->f_dev->dv_strategy(f->f_devdata, F_READ, cdb2devb(bno),
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ISO_DEFAULT_BLOCK_SIZE, buf, &read);
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if (rc)
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goto out;
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if (read != ISO_DEFAULT_BLOCK_SIZE) {
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rc = EIO;
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goto out;
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}
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rc = EINVAL;
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if (bcmp(vd->id, ISO_STANDARD_ID, sizeof vd->id) != 0)
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goto out;
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if (isonum_711(vd->type) == ISO_VD_END)
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goto out;
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if (isonum_711(vd->type) == ISO_VD_PRIMARY)
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break;
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}
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if (isonum_723(vd->logical_block_size) != ISO_DEFAULT_BLOCK_SIZE)
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goto out;
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2000-01-18 07:43:12 +00:00
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2000-01-18 07:37:10 +00:00
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rec = *(struct iso_directory_record *) vd->root_directory_record;
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if (*path == '/') path++; /* eat leading '/' */
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1998-08-20 08:19:55 +00:00
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while (*path) {
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2000-01-18 07:37:10 +00:00
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bno = isonum_733(rec.extent) + isonum_711(rec.ext_attr_length);
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dsize = isonum_733(rec.size);
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off = 0;
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boff = 0;
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1998-08-20 08:19:55 +00:00
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2000-01-18 07:37:10 +00:00
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while (off < dsize) {
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if ((off % ISO_DEFAULT_BLOCK_SIZE) == 0) {
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twiddle();
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rc = f->f_dev->dv_strategy
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(f->f_devdata, F_READ,
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cdb2devb(bno + boff),
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ISO_DEFAULT_BLOCK_SIZE,
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buf, &read);
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if (rc)
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goto out;
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if (read != ISO_DEFAULT_BLOCK_SIZE) {
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rc = EIO;
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goto out;
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}
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boff++;
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dp = (struct iso_directory_record *) buf;
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1998-08-20 08:19:55 +00:00
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}
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2000-01-18 07:37:10 +00:00
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if (isonum_711(dp->length) == 0) {
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/* skip to next block, if any */
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off = boff * ISO_DEFAULT_BLOCK_SIZE;
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continue;
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}
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if (dirmatch(path, dp))
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break;
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dp = (struct iso_directory_record *)
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((char *) dp + isonum_711(dp->length));
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off += isonum_711(dp->length);
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1998-08-20 08:19:55 +00:00
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}
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2000-01-18 07:37:10 +00:00
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if (off == dsize) {
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rc = ENOENT;
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goto out;
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1998-08-20 08:19:55 +00:00
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}
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2000-01-18 07:37:10 +00:00
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rec = *dp;
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while (*path && *path != '/') /* look for next component */
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path++;
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if (*path) path++; /* skip '/' */
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1998-08-20 08:19:55 +00:00
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}
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2000-01-18 07:43:12 +00:00
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1998-08-20 08:19:55 +00:00
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/* allocate file system specific data structure */
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fp = malloc(sizeof(struct file));
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bzero(fp, sizeof(struct file));
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f->f_fsdata = (void *)fp;
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2000-04-29 20:47:10 +00:00
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fp->f_isdir = (isonum_711(rec.flags) & 2) != 0;
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fp->f_off = 0;
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fp->f_bno = isonum_733(rec.extent) + isonum_711(rec.ext_attr_length);
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fp->f_size = isonum_733(rec.size);
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1998-08-20 08:19:55 +00:00
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free(buf);
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2000-01-18 07:43:12 +00:00
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1998-08-20 08:19:55 +00:00
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return 0;
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2000-01-18 07:43:12 +00:00
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1998-08-20 08:19:55 +00:00
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out:
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if (fp)
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free(fp);
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free(buf);
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2000-01-18 07:43:12 +00:00
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1998-08-20 08:19:55 +00:00
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return rc;
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}
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static int
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cd9660_close(f)
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struct open_file *f;
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{
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struct file *fp = (struct file *)f->f_fsdata;
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2000-01-18 07:43:12 +00:00
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1998-08-20 08:19:55 +00:00
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f->f_fsdata = 0;
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free(fp);
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2000-01-18 07:43:12 +00:00
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1998-08-20 08:19:55 +00:00
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return 0;
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}
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static int
|
2000-04-29 20:47:10 +00:00
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buf_read_file(f, buf_p, size_p)
|
1998-08-20 08:19:55 +00:00
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struct open_file *f;
|
2000-04-29 20:47:10 +00:00
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char **buf_p;
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size_t *size_p;
|
1998-08-20 08:19:55 +00:00
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{
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struct file *fp = (struct file *)f->f_fsdata;
|
2000-04-29 20:47:10 +00:00
|
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daddr_t blkno;
|
1998-08-20 08:19:55 +00:00
|
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int rc = 0;
|
2000-04-29 20:47:10 +00:00
|
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size_t read;
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blkno = fp->f_off / ISO_DEFAULT_BLOCK_SIZE + fp->f_bno;
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if (blkno != fp->f_buf_blkno) {
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|
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if (fp->f_buf == (char *)0)
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fp->f_buf = malloc(ISO_DEFAULT_BLOCK_SIZE);
|
2000-01-18 07:43:12 +00:00
|
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twiddle();
|
2000-04-29 20:47:10 +00:00
|
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rc = f->f_dev->dv_strategy(f->f_devdata, F_READ,
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|
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cdb2devb(blkno), ISO_DEFAULT_BLOCK_SIZE, fp->f_buf, &read);
|
1998-08-20 08:19:55 +00:00
|
|
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if (rc)
|
2000-04-29 20:47:10 +00:00
|
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return (rc);
|
1998-08-20 08:19:55 +00:00
|
|
|
if (read != ISO_DEFAULT_BLOCK_SIZE)
|
2000-04-29 20:47:10 +00:00
|
|
|
return (EIO);
|
|
|
|
|
|
|
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fp->f_buf_blkno = blkno;
|
1998-08-20 08:19:55 +00:00
|
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}
|
2000-04-29 20:47:10 +00:00
|
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|
|
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*buf_p = fp->f_buf + fp->f_off;
|
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|
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*size_p = ISO_DEFAULT_BLOCK_SIZE - fp->f_off;
|
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|
|
|
|
|
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if (*size_p > fp->f_size - fp->f_off)
|
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|
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*size_p = fp->f_size - fp->f_off;
|
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|
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return (rc);
|
1998-08-20 08:19:55 +00:00
|
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|
}
|
|
|
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|
2000-01-18 07:37:10 +00:00
|
|
|
static int
|
2000-04-29 20:47:10 +00:00
|
|
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cd9660_read(f, start, size, resid)
|
2000-01-18 07:37:10 +00:00
|
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struct open_file *f;
|
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|
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void *start;
|
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|
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size_t size;
|
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|
|
size_t *resid;
|
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|
|
{
|
|
|
|
struct file *fp = (struct file *)f->f_fsdata;
|
2000-04-29 20:47:10 +00:00
|
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|
char *buf, *addr;
|
|
|
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size_t buf_size, csize;
|
2000-01-18 07:37:10 +00:00
|
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|
int rc = 0;
|
2000-01-18 07:43:12 +00:00
|
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|
2000-04-29 20:47:10 +00:00
|
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|
addr = start;
|
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|
|
while (size) {
|
|
|
|
if (fp->f_off < 0 || fp->f_off >= fp->f_size)
|
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|
|
break;
|
2000-01-18 07:37:10 +00:00
|
|
|
|
2000-04-29 20:47:10 +00:00
|
|
|
rc = buf_read_file(f, &buf, &buf_size);
|
2000-01-18 07:37:10 +00:00
|
|
|
if (rc)
|
|
|
|
break;
|
|
|
|
|
2000-04-29 20:47:10 +00:00
|
|
|
csize = size > buf_size ? buf_size : size;
|
|
|
|
bcopy(buf, addr, csize);
|
2000-01-18 07:37:10 +00:00
|
|
|
|
2000-04-29 20:47:10 +00:00
|
|
|
fp->f_off += csize;
|
|
|
|
addr += csize;
|
|
|
|
size -= csize;
|
|
|
|
}
|
2000-01-18 07:37:10 +00:00
|
|
|
if (resid)
|
2000-04-29 20:47:10 +00:00
|
|
|
*resid = size;
|
|
|
|
return (rc);
|
2000-01-18 07:37:10 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2000-04-29 20:47:10 +00:00
|
|
|
cd9660_readdir(struct open_file *f, struct dirent *d)
|
2000-01-18 07:37:10 +00:00
|
|
|
{
|
|
|
|
struct file *fp = (struct file *)f->f_fsdata;
|
2000-04-29 20:47:10 +00:00
|
|
|
struct iso_directory_record *ep;
|
|
|
|
size_t buf_size, reclen, namelen;
|
|
|
|
int error = 0;
|
|
|
|
char *buf;
|
|
|
|
|
|
|
|
again:
|
|
|
|
if (fp->f_off >= fp->f_size)
|
|
|
|
return (ENOENT);
|
|
|
|
error = buf_read_file(f, &buf, &buf_size);
|
|
|
|
if (error)
|
|
|
|
return (error);
|
|
|
|
ep = (struct iso_directory_record *)buf;
|
|
|
|
|
|
|
|
if (isonum_711(ep->length) == 0) {
|
|
|
|
daddr_t blkno;
|
|
|
|
|
|
|
|
/* skip to next block, if any */
|
|
|
|
blkno = fp->f_off / ISO_DEFAULT_BLOCK_SIZE;
|
|
|
|
fp->f_off = (blkno + 1) * ISO_DEFAULT_BLOCK_SIZE;
|
|
|
|
goto again;
|
|
|
|
}
|
|
|
|
|
|
|
|
namelen = isonum_711(ep->name_len);
|
|
|
|
if (namelen == 1 && ep->name[0] == 1)
|
|
|
|
namelen = 2;
|
|
|
|
reclen = sizeof(struct dirent) - (MAXNAMLEN+1) + namelen + 1;
|
|
|
|
reclen = (reclen + 3) & ~3;
|
2000-01-18 07:37:10 +00:00
|
|
|
|
2000-04-29 20:47:10 +00:00
|
|
|
d->d_fileno = isonum_733(ep->extent);
|
|
|
|
d->d_reclen = reclen;
|
|
|
|
if (isonum_711(ep->flags) & 2)
|
|
|
|
d->d_type = DT_DIR;
|
2000-01-18 07:37:10 +00:00
|
|
|
else
|
2000-04-29 20:47:10 +00:00
|
|
|
d->d_type = DT_REG;
|
|
|
|
d->d_namlen = namelen;
|
|
|
|
|
|
|
|
if (isonum_711(ep->name_len) == 1 && ep->name[0] == 0)
|
|
|
|
strcpy(d->d_name, ".");
|
|
|
|
else if (isonum_711(ep->name_len) == 1 && ep->name[0] == 1)
|
|
|
|
strcpy(d->d_name, "..");
|
|
|
|
else
|
|
|
|
bcopy(ep->name, d->d_name, d->d_namlen);
|
|
|
|
d->d_name[d->d_namlen] = 0;
|
|
|
|
|
|
|
|
fp->f_off += isonum_711(ep->length);
|
|
|
|
return (0);
|
2000-01-18 07:37:10 +00:00
|
|
|
}
|
|
|
|
|
1998-08-20 08:19:55 +00:00
|
|
|
static int
|
|
|
|
cd9660_write(f, start, size, resid)
|
|
|
|
struct open_file *f;
|
|
|
|
void *start;
|
|
|
|
size_t size;
|
|
|
|
size_t *resid;
|
|
|
|
{
|
|
|
|
return EROFS;
|
|
|
|
}
|
|
|
|
|
|
|
|
static off_t
|
|
|
|
cd9660_seek(f, offset, where)
|
|
|
|
struct open_file *f;
|
|
|
|
off_t offset;
|
|
|
|
int where;
|
|
|
|
{
|
|
|
|
struct file *fp = (struct file *)f->f_fsdata;
|
2000-01-18 07:43:12 +00:00
|
|
|
|
1998-08-20 08:19:55 +00:00
|
|
|
switch (where) {
|
|
|
|
case SEEK_SET:
|
2000-04-29 20:47:10 +00:00
|
|
|
fp->f_off = offset;
|
1998-08-20 08:19:55 +00:00
|
|
|
break;
|
|
|
|
case SEEK_CUR:
|
2000-04-29 20:47:10 +00:00
|
|
|
fp->f_off += offset;
|
1998-08-20 08:19:55 +00:00
|
|
|
break;
|
|
|
|
case SEEK_END:
|
2000-04-29 20:47:10 +00:00
|
|
|
fp->f_off = fp->f_size - offset;
|
1998-08-20 08:19:55 +00:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return -1;
|
|
|
|
}
|
2000-04-29 20:47:10 +00:00
|
|
|
return fp->f_off;
|
1998-08-20 08:19:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
cd9660_stat(f, sb)
|
|
|
|
struct open_file *f;
|
|
|
|
struct stat *sb;
|
|
|
|
{
|
|
|
|
struct file *fp = (struct file *)f->f_fsdata;
|
2000-01-18 07:43:12 +00:00
|
|
|
|
2000-01-18 07:37:10 +00:00
|
|
|
/* only important stuff */
|
|
|
|
sb->st_mode = S_IRUSR | S_IRGRP | S_IROTH;
|
2000-04-29 20:47:10 +00:00
|
|
|
if (fp->f_isdir)
|
2000-01-18 07:37:10 +00:00
|
|
|
sb->st_mode |= S_IFDIR;
|
|
|
|
else
|
|
|
|
sb->st_mode |= S_IFREG;
|
1998-08-20 08:19:55 +00:00
|
|
|
sb->st_uid = sb->st_gid = 0;
|
2000-04-29 20:47:10 +00:00
|
|
|
sb->st_size = fp->f_size;
|
1998-08-20 08:19:55 +00:00
|
|
|
return 0;
|
|
|
|
}
|