1 /* $NetBSD: cd9660_archimedes.c,v 1.1 2009/01/10 22:06:29 bjh21 Exp $ */
4 * SPDX-License-Identifier: BSD-3-Clause
6 * Copyright (c) 1998, 2009 Ben Harris
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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32 * cd9660_archimedes.c - support for RISC OS "ARCHIMEDES" extension
34 * RISC OS CDFS looks for a special block at the end of the System Use
35 * Field for each file. If present, this contains the RISC OS load
36 * and exec address (used to hold the file timestamp and type), the
37 * file attributes, and a flag indicating whether the first character
38 * of the filename should be replaced with '!' (since many special
39 * RISC OS filenames do).
42 #include <sys/cdefs.h>
43 __FBSDID("$FreeBSD$");
53 #include "cd9660_archimedes.h"
56 * Convert a Unix time_t (non-leap seconds since 1970-01-01) to a RISC
57 * OS time (non-leap(?) centiseconds since 1900-01-01(?)).
61 riscos_date(time_t unixtime)
65 base = 31536000ULL * 70 + 86400 * 17;
66 return (((u_int64_t)unixtime) + base)*100;
70 * Add "ARCHIMEDES" metadata to a node if that seems appropriate.
72 * We touch regular files with names matching /,[0-9a-f]{3}$/ and
73 * directories matching /^!/.
76 archimedes_convert_node(cd9660node *node)
78 struct ISO_ARCHIMEDES *arc;
83 if (node->su_tail_data != NULL)
84 /* Something else already has the tail. */
87 len = strlen(node->node->name);
90 if (len >= 4 && node->node->name[len-4] == ',')
91 /* XXX should support ,xxx and ,lxa */
92 type = strtoul(node->node->name + len - 3, NULL, 16);
93 if (type == -1 && node->node->name[0] != '!')
95 if (type == -1) type = 0;
97 assert(sizeof(*arc) == 32);
98 arc = ecalloc(1, sizeof(*arc));
100 stamp = riscos_date(node->node->inode->st.st_mtime);
102 memcpy(arc->magic, "ARCHIMEDES", 10);
103 cd9660_731(0xfff00000 | (type << 8) | (stamp >> 32), arc->loadaddr);
104 cd9660_731(stamp & 0x00ffffffffULL, arc->execaddr);
105 arc->ro_attr = RO_ACCESS_UR | RO_ACCESS_OR;
106 arc->cdfs_attr = node->node->name[0] == '!' ? CDFS_PLING : 0;
107 node->su_tail_data = (void *)arc;
108 node->su_tail_size = sizeof(*arc);
112 * Add "ARCHIMEDES" metadata to an entire tree recursively.
115 archimedes_convert_tree(cd9660node *node)
119 assert(node != NULL);
121 archimedes_convert_node(node);
123 /* Recurse on children. */
124 TAILQ_FOREACH(cn, &node->cn_children, cn_next_child)
125 archimedes_convert_tree(cn);