Moved from sys/arch/alpha/stand/installboot/cd9660.c,v
This commit is contained in:
cgd
parent
84d60a245d
commit
2e3c73533f
|
|
@ -0,0 +1,278 @@
|
|||
/* $NetBSD: cd9660.c,v 1.2 1999/04/05 03:02:03 cgd Exp $ */
|
||||
|
||||
/*
|
||||
* Copyright (C) 1996 Wolfgang Solfrank.
|
||||
* Copyright (C) 1996 TooLs GmbH.
|
||||
* All rights reserved.
|
||||
*
|
||||
* 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 TooLs GmbH.
|
||||
* 4. The name of TooLs GmbH may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
|
||||
*/
|
||||
|
||||
/*
|
||||
* File lookup for ISO-9660 file systems. Taken from:
|
||||
*
|
||||
* src/sys/lib/libsa/cd9660.c
|
||||
*
|
||||
* NetBSD: cd9660.c,v 1.5 1997/06/26 19:11:33 drochner Exp
|
||||
*/
|
||||
|
||||
/*
|
||||
* Stand-alone ISO9660 file reading package.
|
||||
*
|
||||
* Note: This doesn't support Rock Ridge extensions, extended attributes,
|
||||
* blocksizes other than 2048 bytes, multi-extent files, etc.
|
||||
*/
|
||||
|
||||
#include <sys/param.h>
|
||||
#include <isofs/cd9660/iso.h>
|
||||
#include <ctype.h>
|
||||
#include <errno.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <unistd.h>
|
||||
|
||||
#include "extern.h"
|
||||
|
||||
struct ptable_ent {
|
||||
char namlen [ISODCL( 1, 1)]; /* 711 */
|
||||
char extlen [ISODCL( 2, 2)]; /* 711 */
|
||||
char block [ISODCL( 3, 6)]; /* 732 */
|
||||
char parent [ISODCL( 7, 8)]; /* 722 */
|
||||
char name [1];
|
||||
};
|
||||
#define PTFIXSZ 8
|
||||
#define PTSIZE(pp) roundup(PTFIXSZ + isonum_711((pp)->namlen), 2)
|
||||
|
||||
#define cdb2devb(bno) ((bno) * ISO_DEFAULT_BLOCK_SIZE / DEV_BSIZE)
|
||||
|
||||
static int pnmatch __P((char *, struct ptable_ent *));
|
||||
static int dirmatch __P((char *, struct iso_directory_record *));
|
||||
static int strategy __P((int, off_t, size_t, void *, size_t *));
|
||||
|
||||
static int
|
||||
pnmatch(path, pp)
|
||||
char *path;
|
||||
struct ptable_ent *pp;
|
||||
{
|
||||
char *cp;
|
||||
int i;
|
||||
|
||||
cp = pp->name;
|
||||
for (i = isonum_711(pp->namlen); --i >= 0; path++, cp++) {
|
||||
if (toupper(*path) == *cp)
|
||||
continue;
|
||||
return 0;
|
||||
}
|
||||
if (*path != '/')
|
||||
return 0;
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
dirmatch(path, dp)
|
||||
char *path;
|
||||
struct iso_directory_record *dp;
|
||||
{
|
||||
char *cp;
|
||||
int i;
|
||||
|
||||
/* This needs to be a regular file */
|
||||
if (dp->flags[0] & 6)
|
||||
return 0;
|
||||
|
||||
cp = dp->name;
|
||||
for (i = isonum_711(dp->name_len); --i >= 0; path++, cp++) {
|
||||
if (!*path)
|
||||
break;
|
||||
if (toupper(*path) == *cp)
|
||||
continue;
|
||||
return 0;
|
||||
}
|
||||
if (*path)
|
||||
return 0;
|
||||
/*
|
||||
* Allow stripping of trailing dots and the version number.
|
||||
* Note that this will find the first instead of the last version
|
||||
* of a file.
|
||||
*/
|
||||
if (i >= 0 && (*cp == ';' || *cp == '.')) {
|
||||
/* This is to prevent matching of numeric extensions */
|
||||
if (*cp == '.' && cp[1] != ';')
|
||||
return 0;
|
||||
while (--i >= 0)
|
||||
if (*++cp != ';' && (*cp < '0' || *cp > '9'))
|
||||
return 0;
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
strategy(fd, blkno, size, buf, cnt)
|
||||
int fd;
|
||||
off_t blkno;
|
||||
size_t size;
|
||||
void *buf;
|
||||
size_t *cnt;
|
||||
{
|
||||
off_t offset = blkno * DEV_BSIZE;
|
||||
|
||||
if (lseek(fd, offset, SEEK_SET) != offset)
|
||||
return (1);
|
||||
*cnt = read(fd, buf, size);
|
||||
if (*cnt != size)
|
||||
return (1);
|
||||
return (0);
|
||||
}
|
||||
|
||||
int
|
||||
cd9660_lookup(path, fd, blknop, sizep)
|
||||
char *path;
|
||||
int fd;
|
||||
u_long *blknop, *sizep;
|
||||
{
|
||||
void *buf;
|
||||
struct iso_primary_descriptor *vd;
|
||||
size_t buf_size, read, psize, dsize;
|
||||
daddr_t bno;
|
||||
int parent, ent;
|
||||
struct ptable_ent *pp;
|
||||
struct iso_directory_record *dp = 0;
|
||||
int rc;
|
||||
|
||||
/* First find the volume descriptor */
|
||||
buf = malloc(buf_size = ISO_DEFAULT_BLOCK_SIZE);
|
||||
vd = buf;
|
||||
for (bno = 16;; bno++) {
|
||||
rc = strategy(fd, cdb2devb(bno), ISO_DEFAULT_BLOCK_SIZE,
|
||||
buf, &read);
|
||||
if (rc)
|
||||
goto out;
|
||||
if (read != ISO_DEFAULT_BLOCK_SIZE) {
|
||||
rc = EIO;
|
||||
goto out;
|
||||
}
|
||||
rc = EINVAL;
|
||||
if (bcmp(vd->id, ISO_STANDARD_ID, sizeof vd->id) != 0)
|
||||
goto out;
|
||||
if (isonum_711(vd->type) == ISO_VD_END)
|
||||
goto out;
|
||||
if (isonum_711(vd->type) == ISO_VD_PRIMARY)
|
||||
break;
|
||||
}
|
||||
if (isonum_723(vd->logical_block_size) != ISO_DEFAULT_BLOCK_SIZE)
|
||||
goto out;
|
||||
|
||||
/* Now get the path table and lookup the directory of the file */
|
||||
bno = isonum_732(vd->type_m_path_table);
|
||||
psize = isonum_733(vd->path_table_size);
|
||||
|
||||
if (psize > ISO_DEFAULT_BLOCK_SIZE) {
|
||||
free(buf);
|
||||
buf = malloc(buf_size = roundup(psize, ISO_DEFAULT_BLOCK_SIZE));
|
||||
}
|
||||
|
||||
rc = strategy(fd, cdb2devb(bno), buf_size, buf, &read);
|
||||
if (rc)
|
||||
goto out;
|
||||
if (read != buf_size) {
|
||||
rc = EIO;
|
||||
goto out;
|
||||
}
|
||||
|
||||
parent = 1;
|
||||
pp = (struct ptable_ent *)buf;
|
||||
ent = 1;
|
||||
bno = isonum_732(pp->block) + isonum_711(pp->extlen);
|
||||
|
||||
rc = ENOENT;
|
||||
while (*path) {
|
||||
if ((u_long)pp >= (u_long)buf + psize)
|
||||
break;
|
||||
if (isonum_722(pp->parent) != parent)
|
||||
break;
|
||||
if (!pnmatch(path, pp)) {
|
||||
pp = (struct ptable_ent *)((u_long)pp + PTSIZE(pp));
|
||||
ent++;
|
||||
continue;
|
||||
}
|
||||
path += isonum_711(pp->namlen) + 1;
|
||||
parent = ent;
|
||||
bno = isonum_732(pp->block) + isonum_711(pp->extlen);
|
||||
while ((u_long)pp < (u_long)buf + psize) {
|
||||
if (isonum_722(pp->parent) == parent)
|
||||
break;
|
||||
pp = (struct ptable_ent *)((u_long)pp + PTSIZE(pp));
|
||||
ent++;
|
||||
}
|
||||
}
|
||||
|
||||
/* Now bno has the start of the directory that supposedly contains the file */
|
||||
bno--;
|
||||
dsize = 1; /* Something stupid, but > 0 XXX */
|
||||
for (psize = 0; psize < dsize;) {
|
||||
if (!(psize % ISO_DEFAULT_BLOCK_SIZE)) {
|
||||
bno++;
|
||||
rc = strategy(fd, cdb2devb(bno),
|
||||
ISO_DEFAULT_BLOCK_SIZE, buf, &read);
|
||||
if (rc)
|
||||
goto out;
|
||||
if (read != ISO_DEFAULT_BLOCK_SIZE) {
|
||||
rc = EIO;
|
||||
goto out;
|
||||
}
|
||||
dp = (struct iso_directory_record *)buf;
|
||||
}
|
||||
if (!isonum_711(dp->length)) {
|
||||
if ((void *)dp == buf)
|
||||
psize += ISO_DEFAULT_BLOCK_SIZE;
|
||||
else
|
||||
psize = roundup(psize, ISO_DEFAULT_BLOCK_SIZE);
|
||||
continue;
|
||||
}
|
||||
if (dsize == 1)
|
||||
dsize = isonum_733(dp->size);
|
||||
if (dirmatch(path, dp))
|
||||
break;
|
||||
psize += isonum_711(dp->length);
|
||||
dp = (struct iso_directory_record *)((u_long)dp + isonum_711(dp->length));
|
||||
}
|
||||
|
||||
if (psize >= dsize) {
|
||||
rc = ENOENT;
|
||||
goto out;
|
||||
}
|
||||
|
||||
*blknop = isonum_733(dp->extent);
|
||||
*sizep = isonum_733(dp->size);
|
||||
free(buf);
|
||||
|
||||
return 0;
|
||||
|
||||
out:
|
||||
free(buf);
|
||||
|
||||
return rc;
|
||||
}
|
||||
Loading…
Reference in New Issue