ff736f6bae
iso9660_fs_readdir now returns a list of iso9660_stat_t's rather than filenames. This should reduce by a small amount the number of CD reads since we store more information in the iso9660_fs_readdir return. However all of this is in preparation for greatly reducing the number of CD reads when picking out segment lsn information.
394 lines
10 KiB
C
394 lines
10 KiB
C
/*
|
||
$Id: iso9660_fs.c,v 1.13 2003/11/16 19:30:45 rocky Exp $
|
||
|
||
Copyright (C) 2001 Herbert Valerio Riedel <hvr@gnu.org>
|
||
Copyright (C) 2003 Rocky Bernstein <rocky@panix.com>
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||
*/
|
||
|
||
#ifdef HAVE_CONFIG_H
|
||
# include "config.h"
|
||
#endif
|
||
|
||
#ifdef HAVE_STRING_H
|
||
#include <string.h>
|
||
#endif
|
||
|
||
#include <cdio/cdio.h>
|
||
#include <cdio/iso9660.h>
|
||
#include <cdio/util.h>
|
||
|
||
/* Private headers */
|
||
#include "cdio_assert.h"
|
||
#include "bytesex.h"
|
||
#include "ds.h"
|
||
|
||
#include <stdio.h>
|
||
|
||
static const char _rcsid[] = "$Id: iso9660_fs.c,v 1.13 2003/11/16 19:30:45 rocky Exp $";
|
||
|
||
static iso9660_stat_t *
|
||
_iso9660_dir_to_statbuf (const iso9660_dir_t *iso9660_dir, bool is_mode2)
|
||
{
|
||
iso9660_xa_t *xa_data = NULL;
|
||
uint8_t dir_len= iso9660_get_dir_len(iso9660_dir);
|
||
unsigned int filename_len;
|
||
unsigned int stat_len;
|
||
iso9660_stat_t *stat;
|
||
|
||
if (!dir_len) return NULL;
|
||
|
||
filename_len = from_711(iso9660_dir->filename_len);
|
||
|
||
/* .. string in statbuf is one longer than in iso9660_dir's listing '\1' */
|
||
stat_len = sizeof(iso9660_stat_t)+filename_len+2;
|
||
|
||
stat = _cdio_malloc(stat_len);
|
||
stat->type = (iso9660_dir->file_flags & ISO_DIRECTORY)
|
||
? _STAT_DIR : _STAT_FILE;
|
||
stat->lsn = from_733 (iso9660_dir->extent);
|
||
stat->size = from_733 (iso9660_dir->size);
|
||
stat->secsize = _cdio_len2blocks (stat->size, ISO_BLOCKSIZE);
|
||
|
||
if (iso9660_dir->filename[0] == '\0')
|
||
strcpy (stat->filename, ".");
|
||
else if (iso9660_dir->filename[0] == '\1')
|
||
strcpy (stat->filename, "..");
|
||
else
|
||
strncpy (stat->filename, iso9660_dir->filename, filename_len);
|
||
|
||
iso9660_get_dtime(&(iso9660_dir->recording_time), true, &(stat->tm));
|
||
|
||
cdio_assert (dir_len >= sizeof (iso9660_dir_t));
|
||
|
||
if (is_mode2) {
|
||
int su_length = iso9660_get_dir_len(iso9660_dir) - sizeof (iso9660_dir_t);
|
||
su_length -= filename_len;
|
||
|
||
if (su_length % 2)
|
||
su_length--;
|
||
|
||
if (su_length < 0 || su_length < sizeof (iso9660_xa_t))
|
||
return stat;
|
||
|
||
xa_data = (void *) (((char *) iso9660_dir)
|
||
+ (iso9660_get_dir_len(iso9660_dir) - su_length));
|
||
|
||
if (xa_data->signature[0] != 'X'
|
||
|| xa_data->signature[1] != 'A')
|
||
{
|
||
cdio_warn ("XA signature not found in ISO9660's system use area;"
|
||
" ignoring XA attributes for this file entry.");
|
||
cdio_debug ("%d %d %d, '%c%c' (%d, %d)",
|
||
iso9660_get_dir_len(iso9660_dir),
|
||
filename_len,
|
||
su_length,
|
||
xa_data->signature[0], xa_data->signature[1],
|
||
xa_data->signature[0], xa_data->signature[1]);
|
||
return stat;
|
||
}
|
||
stat->xa = *xa_data;
|
||
}
|
||
return stat;
|
||
|
||
}
|
||
|
||
/*!
|
||
Return the directory name stored in the iso9660_dir_t
|
||
|
||
A string is allocated: the caller must deallocate.
|
||
*/
|
||
char *
|
||
iso9660_dir_to_name (const iso9660_dir_t *iso9660_dir)
|
||
{
|
||
char namebuf[256] = { 0, };
|
||
uint8_t len=iso9660_get_dir_len(iso9660_dir);
|
||
|
||
if (!len) return NULL;
|
||
|
||
cdio_assert (len >= sizeof (iso9660_dir_t));
|
||
|
||
/* (iso9660_dir->file_flags & ISO_DIRECTORY) */
|
||
|
||
if (iso9660_dir->filename[0] == '\0')
|
||
strcpy (namebuf, ".");
|
||
else if (iso9660_dir->filename[0] == '\1')
|
||
strcpy (namebuf, "..");
|
||
else
|
||
strncpy (namebuf, iso9660_dir->filename, iso9660_dir->filename_len);
|
||
|
||
return strdup (namebuf);
|
||
}
|
||
|
||
|
||
static iso9660_stat_t *
|
||
_fs_stat_root (const CdIo *cdio, bool is_mode2)
|
||
{
|
||
char block[ISO_BLOCKSIZE] = { 0, };
|
||
const iso9660_pvd_t *pvd = (void *) █
|
||
const iso9660_dir_t *iso9660_dir = (void *) pvd->root_directory_record;
|
||
iso9660_stat_t *stat;
|
||
|
||
if (is_mode2) {
|
||
if (cdio_read_mode2_sector (cdio, &block, ISO_PVD_SECTOR, false))
|
||
cdio_assert_not_reached ();
|
||
} else {
|
||
if (cdio_read_mode1_sector (cdio, &block, ISO_PVD_SECTOR, false))
|
||
cdio_assert_not_reached ();
|
||
}
|
||
|
||
stat = _iso9660_dir_to_statbuf (iso9660_dir, is_mode2);
|
||
return stat;
|
||
}
|
||
|
||
static iso9660_stat_t *
|
||
_fs_stat_traverse (const CdIo *cdio, const iso9660_stat_t *_root,
|
||
char **splitpath, bool is_mode2)
|
||
{
|
||
unsigned offset = 0;
|
||
uint8_t *_dirbuf = NULL;
|
||
iso9660_stat_t *stat;
|
||
|
||
if (!splitpath[0])
|
||
{
|
||
unsigned int len=sizeof(iso9660_stat_t) + strlen(_root->filename)+1;
|
||
stat = _cdio_malloc(len);
|
||
memcpy(stat, _root, len);
|
||
return stat;
|
||
}
|
||
|
||
if (_root->type == _STAT_FILE)
|
||
return NULL;
|
||
|
||
cdio_assert (_root->type == _STAT_DIR);
|
||
|
||
if (_root->size != ISO_BLOCKSIZE * _root->secsize)
|
||
{
|
||
cdio_warn ("bad size for ISO9660 directory (%ud) should be (%lu)!",
|
||
(unsigned) _root->size,
|
||
(unsigned long int) ISO_BLOCKSIZE * _root->secsize);
|
||
}
|
||
|
||
_dirbuf = _cdio_malloc (_root->secsize * ISO_BLOCKSIZE);
|
||
|
||
if (is_mode2) {
|
||
if (cdio_read_mode2_sectors (cdio, _dirbuf, _root->lsn, false,
|
||
_root->secsize))
|
||
cdio_assert_not_reached ();
|
||
} else {
|
||
if (cdio_read_mode1_sectors (cdio, _dirbuf, _root->lsn, false,
|
||
_root->secsize))
|
||
cdio_assert_not_reached ();
|
||
}
|
||
|
||
while (offset < (_root->secsize * ISO_BLOCKSIZE))
|
||
{
|
||
const iso9660_dir_t *iso9660_dir = (void *) &_dirbuf[offset];
|
||
iso9660_stat_t *stat;
|
||
|
||
if (!iso9660_get_dir_len(iso9660_dir))
|
||
{
|
||
offset++;
|
||
continue;
|
||
}
|
||
|
||
stat = _iso9660_dir_to_statbuf (iso9660_dir, is_mode2);
|
||
|
||
if (!strcmp (splitpath[0], stat->filename))
|
||
{
|
||
iso9660_stat_t *ret_stat
|
||
= _fs_stat_traverse (cdio, stat, &splitpath[1], is_mode2);
|
||
free(stat);
|
||
free (_dirbuf);
|
||
return ret_stat;
|
||
}
|
||
|
||
free(stat);
|
||
|
||
offset += iso9660_get_dir_len(iso9660_dir);
|
||
}
|
||
|
||
cdio_assert (offset == (_root->secsize * ISO_BLOCKSIZE));
|
||
|
||
/* not found */
|
||
free (_dirbuf);
|
||
return NULL;
|
||
}
|
||
|
||
/*!
|
||
Get file status for pathname into stat. NULL is returned on error.
|
||
*/
|
||
iso9660_stat_t *
|
||
iso9660_fs_stat (const CdIo *cdio, const char pathname[], bool is_mode2)
|
||
{
|
||
iso9660_stat_t *root;
|
||
char **splitpath;
|
||
iso9660_stat_t *stat;
|
||
|
||
cdio_assert (cdio != NULL);
|
||
cdio_assert (pathname != NULL);
|
||
|
||
root = _fs_stat_root (cdio, is_mode2);
|
||
if (NULL == root) return NULL;
|
||
|
||
splitpath = _cdio_strsplit (pathname, '/');
|
||
stat = _fs_stat_traverse (cdio, root, splitpath, is_mode2);
|
||
free(root);
|
||
_cdio_strfreev (splitpath);
|
||
|
||
return stat;
|
||
}
|
||
|
||
|
||
/*!
|
||
Read pathname (a directory) and return a list of iso9660_stat_t
|
||
of the files inside that. The caller must free the returned result.
|
||
*/
|
||
void *
|
||
iso9660_fs_readdir (const CdIo *cdio, const char pathname[], bool is_mode2)
|
||
{
|
||
iso9660_stat_t *stat;
|
||
|
||
cdio_assert (cdio != NULL);
|
||
cdio_assert (pathname != NULL);
|
||
|
||
stat = iso9660_fs_stat (cdio, pathname, is_mode2);
|
||
if (NULL == stat)
|
||
return NULL;
|
||
|
||
if (stat->type != _STAT_DIR) {
|
||
free(stat);
|
||
return NULL;
|
||
}
|
||
|
||
{
|
||
unsigned offset = 0;
|
||
uint8_t *_dirbuf = NULL;
|
||
CdioList *retval = _cdio_list_new ();
|
||
|
||
if (stat->size != ISO_BLOCKSIZE * stat->secsize)
|
||
{
|
||
cdio_warn ("bad size for ISO9660 directory (%ud) should be (%lu)!",
|
||
(unsigned) stat->size,
|
||
(unsigned long int) ISO_BLOCKSIZE * stat->secsize);
|
||
}
|
||
|
||
_dirbuf = _cdio_malloc (stat->secsize * ISO_BLOCKSIZE);
|
||
|
||
if (is_mode2) {
|
||
if (cdio_read_mode2_sectors (cdio, _dirbuf, stat->lsn, false,
|
||
stat->secsize))
|
||
cdio_assert_not_reached ();
|
||
} else {
|
||
if (cdio_read_mode1_sectors (cdio, _dirbuf, stat->lsn, false,
|
||
stat->secsize))
|
||
cdio_assert_not_reached ();
|
||
}
|
||
|
||
while (offset < (stat->secsize * ISO_BLOCKSIZE))
|
||
{
|
||
const iso9660_dir_t *iso9660_dir = (void *) &_dirbuf[offset];
|
||
iso9660_stat_t *iso9660_stat;
|
||
|
||
if (!iso9660_get_dir_len(iso9660_dir))
|
||
{
|
||
offset++;
|
||
continue;
|
||
}
|
||
|
||
iso9660_stat = _iso9660_dir_to_statbuf(iso9660_dir, is_mode2);
|
||
_cdio_list_append (retval, iso9660_stat);
|
||
|
||
offset += iso9660_get_dir_len(iso9660_dir);
|
||
}
|
||
|
||
cdio_assert (offset == (stat->secsize * ISO_BLOCKSIZE));
|
||
|
||
free (_dirbuf);
|
||
free (stat);
|
||
return retval;
|
||
}
|
||
}
|
||
|
||
static iso9660_stat_t *
|
||
find_fs_lsn_recurse (const CdIo *cdio, const char pathname[], lsn_t lsn)
|
||
{
|
||
CdioList *entlist = iso9660_fs_readdir (cdio, pathname, true);
|
||
CdioList *dirlist = _cdio_list_new ();
|
||
CdioListNode *entnode;
|
||
|
||
cdio_assert (entlist != NULL);
|
||
|
||
/* iterate over each entry in the directory */
|
||
|
||
_CDIO_LIST_FOREACH (entnode, entlist)
|
||
{
|
||
iso9660_stat_t *statbuf = _cdio_list_node_data (entnode);
|
||
char _fullname[4096] = { 0, };
|
||
char *filename = (char *) statbuf->filename;
|
||
|
||
snprintf (_fullname, sizeof (_fullname), "%s%s", pathname, filename);
|
||
|
||
strncat (_fullname, "/", sizeof (_fullname));
|
||
|
||
if (statbuf->type == _STAT_DIR
|
||
&& strcmp ((char *) statbuf->filename, ".")
|
||
&& strcmp ((char *) statbuf->filename, ".."))
|
||
_cdio_list_append (dirlist, strdup (_fullname));
|
||
|
||
if (statbuf->lsn == lsn) {
|
||
unsigned int len=sizeof(iso9660_stat_t)+strlen(statbuf->filename)+1;
|
||
iso9660_stat_t *ret_stat = _cdio_malloc(len);
|
||
memcpy(ret_stat, statbuf, len);
|
||
_cdio_list_free (entlist, true);
|
||
_cdio_list_free (dirlist, true);
|
||
return ret_stat;
|
||
}
|
||
|
||
}
|
||
|
||
_cdio_list_free (entlist, true);
|
||
|
||
/* now recurse/descend over directories encountered */
|
||
|
||
_CDIO_LIST_FOREACH (entnode, dirlist)
|
||
{
|
||
char *_fullname = _cdio_list_node_data (entnode);
|
||
iso9660_stat_t *ret_stat = find_fs_lsn_recurse (cdio, _fullname, lsn);
|
||
|
||
if (NULL != ret_stat) {
|
||
_cdio_list_free (dirlist, true);
|
||
return ret_stat;
|
||
}
|
||
}
|
||
|
||
_cdio_list_free (dirlist, true);
|
||
return NULL;
|
||
}
|
||
|
||
/*!
|
||
Given a directory pointer, find the filesystem entry that contains
|
||
lsn and return information about it.
|
||
|
||
Returns stat_t of entry if we found lsn, or NULL otherwise.
|
||
*/
|
||
iso9660_stat_t *
|
||
iso9660_find_fs_lsn(const CdIo *cdio, lsn_t lsn)
|
||
{
|
||
return find_fs_lsn_recurse (cdio, "/", lsn);
|
||
}
|
||
|