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/*
* amiga.c
* Detection of Amiga partition maps and file systems
*
* Copyright (c) 2003 Christoph Pfisterer
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "global.h"
/*
* Amiga "Rigid Disk" partition map
*/
void detect_amiga_partmap(SECTION *section, int level)
{
int i, off, found;
unsigned char *buf;
char s[256], append[64];
u4 blocksize, part_ptr;
u8 cylsize, start, size;
for (off = 0, found = 0; off < 16; off++) {
if (get_buffer(section, off * 512, 512, (void **)&buf) < 512)
break;
if (memcmp(buf, "RDSK", 4) == 0) {
found = 1;
break;
}
}
if (!found)
return;
if (off == 0)
print_line(level, "Amiga Rigid Disk partition map");
else
print_line(level, "Amiga Rigid Disk partition map at sector %d", off);
/* get device block size (?) */
blocksize = get_be_long(buf + 16);
if (blocksize < 256 || (blocksize & (blocksize-1))) {
print_line(level+1, "Illegal block size %lu", blocksize);
return;
} else if (blocksize != 512) {
print_line(level+1, "Unusual block size %lu, not sure this will work...", blocksize);
}
/* TODO: get geometry data for later use */
/* walk the partition list */
part_ptr = get_be_long(buf + 28);
for (i = 1; part_ptr != 0xffffffffUL; i++) {
if (get_buffer(section, (u8)part_ptr * 512, 256,
(void **)&buf) < 256) {
print_line(level, "Partition %d: Can't read partition info block");
break;
}
/* check signature */
if (memcmp(buf, "PART", 4) != 0) {
print_line(level, "Partition %d: Invalid signature");
break;
}
/* get "next" pointer for next iteration */
part_ptr = get_be_long(buf + 16);
/* get sizes */
cylsize = (u8)get_be_long(buf + 140) * (u8)get_be_long(buf + 148);
start = get_be_long(buf + 164) * cylsize;
size = (get_be_long(buf + 168) + 1 - get_be_long(buf + 164)) * cylsize;
snprintf(append, 63, " from %llu", start);
format_blocky_size(s, size, 512, "sectors", append);
print_line(level, "Partition %d: %s",
i, s);
/* get name */
get_pstring(buf + 36, s);
if (s[0])
print_line(level + 1, "Drive name \"%s\"", s);
/*
192/c0 char4DosType 'DOS' and the FFS/OFS flag only
also 'UNI'\0 = AT&T SysV filesystem
'UNI'\1 = UNIX boot filesystem
'UNI'\2 = BSD filesystem for SysV
'resv' = reserved (swap space)
*/
/* detect contents */
if (size > 0 && start > 0) {
analyze_recursive(section, level + 1,
start * 512, size * 512, 0);
}
}
}
/*
* Amiga file system
*/
void detect_amiga_fs(SECTION *section, int level)
{
unsigned char *buf;
int flags;
char s[256];
if (get_buffer(section, 0, 512, (void **)&buf) < 512)
return;
if (memcmp(buf, "DOS", 3) == 0){
flags = buf[4];
if (flags & 1)
strcpy(s, "Amiga FFS file system");
else
strcpy(s, "Amiga OFS file system");
if (flags & 4)
strcat(s, " (intl., dir cache)");
else if (flags & 2)
strcat(s, " (intl., no dir cache)");
else
strcat(s, " (non-intl., no dir cache)");
print_line(level, "%s", s);
if (section->size == 512*11*2*80) {
print_line(level+1, "Size matches DD floppy");
} else if (section->size == 512*22*2*80) {
print_line(level+1, "Size matches HD floppy");
}
} else if (memcmp(buf, "PFS", 3) == 0) {
print_line(level, "Amiga Professional File System");
}
}
/* EOF */
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