/* $NetBSD: cd9660_archimedes.c,v 1.3 2022/04/09 10:05:35 riastradh Exp $ */
/*-
* Copyright (c) 1998, 2009 Ben Harris
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* cd9660_archimedes.c - support for RISC OS "ARCHIMEDES" extension
*
* RISC OS CDFS looks for a special block at the end of the System Use
* Field for each file. If present, this contains the RISC OS load
* and exec address (used to hold the file timestamp and type), the
* file attributes, and a flag indicating whether the first character
* of the filename should be replaced with '!' (since many special
* RISC OS filenames do).
*/
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <sys/cdefs.h>
#if defined(__RCSID) && !defined(__lint)
__RCSID("$NetBSD: cd9660_archimedes.c,v 1.3 2022/04/09 10:05:35 riastradh Exp $");
#endif /* !__lint */
#include <assert.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <util.h>
#include "makefs.h"
#include "cd9660.h"
#include "cd9660_archimedes.h"
/*
* Convert a Unix time_t (non-leap seconds since 1970-01-01) to a RISC
* OS time (non-leap(?) centiseconds since 1900-01-01(?)).
*/
static u_int64_t
riscos_date(time_t unixtime)
{
u_int64_t base;
base = 31536000ULL * 70 + 86400 * 17;
return (((u_int64_t)unixtime) + base)*100;
}
/*
* Add "ARCHIMEDES" metadata to a node if that seems appropriate.
*
* We touch regular files with names matching /,[0-9a-f]{3}$/ and
* directories matching /^!/.
*/
static void
archimedes_convert_node(cd9660node *node)
{
struct ISO_ARCHIMEDES *arc;
size_t len;
int type = -1;
uint64_t stamp;
if (node->su_tail_data != NULL)
/* Something else already has the tail. */
return;
len = strlen(node->node->name);
if (len < 1) return;
if (len >= 4 && node->node->name[len-4] == ',')
/* XXX should support ,xxx and ,lxa */
type = strtoul(node->node->name + len - 3, NULL, 16);
if (type == -1 && node->node->name[0] != '!')
return;
if (type == -1) type = 0;
assert(sizeof(*arc) == 32);
arc = ecalloc(1, sizeof(*arc));
stamp = riscos_date(node->node->inode->st.st_mtime);
memcpy(arc->magic, "ARCHIMEDES", 10);
cd9660_731(0xfff00000 | (type << 8) | (stamp >> 32), arc->loadaddr);
cd9660_731(stamp & 0x00ffffffffULL, arc->execaddr);
arc->ro_attr = RO_ACCESS_UR | RO_ACCESS_OR;
arc->cdfs_attr = node->node->name[0] == '!' ? CDFS_PLING : 0;
node->su_tail_data = (void *)arc;
node->su_tail_size = sizeof(*arc);
}
/*
* Add "ARCHIMEDES" metadata to an entire tree recursively.
*/
void
archimedes_convert_tree(cd9660node *node)
{
cd9660node *cn;
assert(node != NULL);
archimedes_convert_node(node);
/* Recurse on children. */
TAILQ_FOREACH(cn, &node->cn_children, cn_next_child)
archimedes_convert_tree(cn);
}
