121 lines
2.7 KiB
C
121 lines
2.7 KiB
C
/* partiton.c - Read macintosh partition tables. */
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/*
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* PUPA -- Preliminary Universal Programming Architecture for GRUB
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* Copyright (C) 2004 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <pupa/disk.h>
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#include <pupa/misc.h>
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#include <pupa/mm.h>
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#include <pupa/machine/partition.h>
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pupa_err_t
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pupa_partition_iterate (pupa_disk_t disk,
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int (*hook) (const pupa_partition_t partition))
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{
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struct pupa_partition part;
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struct pupa_apple_part apart;
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struct pupa_disk raw;
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int partno = 0;
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int pos = PUPA_DISK_SECTOR_SIZE * 2;
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/* Enforce raw disk access. */
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raw = *disk;
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raw.partition = 0;
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for (;;)
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{
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if (pupa_disk_read (&raw, pos / PUPA_DISK_SECTOR_SIZE,
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pos % PUPA_DISK_SECTOR_SIZE,
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sizeof (struct pupa_apple_part), (char *) &apart))
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return pupa_errno;
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if (apart.magic != PUPA_APPLE_PART_MAGIC)
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break;
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part.start = apart.first_phys_block;
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part.len = apart.blockcnt;
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part.offset = pos;
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part.index = partno;
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if (hook (&part))
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return pupa_errno;
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if (apart.first_phys_block == PUPA_DISK_SECTOR_SIZE * 2)
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return 0;
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pos += sizeof (struct pupa_apple_part);
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partno++;
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}
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return 0;
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}
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pupa_partition_t
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pupa_partition_probe (pupa_disk_t disk, const char *str)
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{
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pupa_partition_t p;
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int partnum = 0;
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char *s = (char *) str;
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int find_func (const pupa_partition_t partition)
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{
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if (partnum == partition->index)
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{
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p = (pupa_partition_t) pupa_malloc (sizeof (*p));
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if (! p)
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return 1;
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pupa_memcpy (p, partition, sizeof (*p));
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return 1;
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}
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return 0;
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}
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/* Get the partition number. */
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partnum = pupa_strtoul (s, &s, 0);
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if (pupa_errno)
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{
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pupa_error (PUPA_ERR_BAD_FILENAME, "invalid partition");
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return 0;
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}
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if (pupa_partition_iterate (disk, find_func))
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goto fail;
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return p;
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fail:
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pupa_free (p);
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return 0;
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}
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char *
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pupa_partition_get_name (const pupa_partition_t p)
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{
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char *name;
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name = pupa_malloc (13);
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if (! name)
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return 0;
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pupa_sprintf (name, "%d", p->index);
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return name;
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}
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