127 lines
4.0 KiB
C
127 lines
4.0 KiB
C
/* $NetBSD: cd9660_archimedes.c,v 1.1 2009/01/10 22:06:29 bjh21 Exp $ */
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/*-
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* Copyright (c) 1998, 2009 Ben Harris
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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. The name of the author 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 THE AUTHOR ``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 THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* cd9660_archimedes.c - support for RISC OS "ARCHIMEDES" extension
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*
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* RISC OS CDFS looks for a special block at the end of the System Use
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* Field for each file. If present, this contains the RISC OS load
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* and exec address (used to hold the file timestamp and type), the
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* file attributes, and a flag indicating whether the first character
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* of the filename should be replaced with '!' (since many special
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* RISC OS filenames do).
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <assert.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include "makefs.h"
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#include "cd9660.h"
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#include "cd9660_archimedes.h"
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/*
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* Convert a Unix time_t (non-leap seconds since 1970-01-01) to a RISC
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* OS time (non-leap(?) centiseconds since 1900-01-01(?)).
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*/
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static u_int64_t
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riscos_date(time_t unixtime)
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{
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u_int64_t base;
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base = 31536000ULL * 70 + 86400 * 17;
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return (((u_int64_t)unixtime) + base)*100;
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}
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/*
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* Add "ARCHIMEDES" metadata to a node if that seems appropriate.
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*
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* We touch regular files with names matching /,[0-9a-f]{3}$/ and
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* directories matching /^!/.
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*/
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static void
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archimedes_convert_node(cd9660node *node)
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{
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struct ISO_ARCHIMEDES *arc;
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size_t len;
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int type = -1;
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uint64_t stamp;
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if (node->su_tail_data != NULL)
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/* Something else already has the tail. */
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return;
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len = strlen(node->node->name);
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if (len < 1) return;
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if (len >= 4 && node->node->name[len-4] == ',')
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/* XXX should support ,xxx and ,lxa */
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type = strtoul(node->node->name + len - 3, NULL, 16);
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if (type == -1 && node->node->name[0] != '!')
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return;
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if (type == -1) type = 0;
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assert(sizeof(struct ISO_ARCHIMEDES) == 32);
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if ((arc = calloc(1, sizeof(struct ISO_ARCHIMEDES))) == NULL) {
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CD9660_MEM_ALLOC_ERROR("archimedes_convert_node");
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exit(1);
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}
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stamp = riscos_date(node->node->inode->st.st_mtime);
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memcpy(arc->magic, "ARCHIMEDES", 10);
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cd9660_731(0xfff00000 | (type << 8) | (stamp >> 32), arc->loadaddr);
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cd9660_731(stamp & 0x00ffffffffULL, arc->execaddr);
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arc->ro_attr = RO_ACCESS_UR | RO_ACCESS_OR;
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arc->cdfs_attr = node->node->name[0] == '!' ? CDFS_PLING : 0;
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node->su_tail_data = (void *)arc;
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node->su_tail_size = sizeof(*arc);
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}
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/*
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* Add "ARCHIMEDES" metadata to an entire tree recursively.
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*/
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void
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archimedes_convert_tree(cd9660node *node)
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{
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cd9660node *cn;
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assert(node != NULL);
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archimedes_convert_node(node);
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/* Recurse on children. */
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TAILQ_FOREACH(cn, &node->cn_children, cn_next_child)
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archimedes_convert_tree(cn);
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}
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