diff options
Diffstat (limited to 'src/magic_block_scan.c')
| -rw-r--r-- | src/magic_block_scan.c | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/src/magic_block_scan.c b/src/magic_block_scan.c new file mode 100644 index 0000000..76792e7 --- /dev/null +++ b/src/magic_block_scan.c @@ -0,0 +1,96 @@ +/*************************************************************************** + * Copyright (C) 2010 by Roberto Maar * + * robi@users.berlios.de * + * * + * This program is free software; you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation; either version 2 of the License, or * + * (at your option) any later version. * + * * + * This program is distributed in the hope that it will be useful, * + * but WITHOUT ANY WARRANTY; without even the implied warranty of * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * + * GNU General Public License for more details. * + * * + * You should have received a copy of the GNU General Public License * + * along with this program; if not, write to the * + * Free Software Foundation, Inc., * + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * + * * + * * + * C Implementation: magic_block_scan * + ***************************************************************************/ +#include <stdio.h> +#include <unistd.h> +#include <stdlib.h> +#include <ctype.h> +#include <string.h> + +#include "util.h" + +#include "magic.h" + +extern ext2_filsys current_fs ; + + + +ext2fs_block_bitmap d_bmap = NULL ; + + +void magic_block_scan(char* des_dir, __u32 t_after){ + int retval; + blk_t blk, o_blk; + int ret, load_db; + struct ext2fs_struct_loc_generic_bitmap *ds_bmap; + char *block_buf = NULL; + magic_t cookie; + int m_result; + + cookie = magic_open(MAGIC_NO_CHECK_COMPRESS | MAGIC_NO_CHECK_ELF | MAGIC_NO_CHECK_TAR); + if ((cookie) && (! magic_load(cookie, NULL))){ + + retval = init_block_bitmap_list(&d_bmap, t_after); + while (retval){ + retval = next_block_bitmap(d_bmap); + if (retval == 2 ) + continue; + + if (d_bmap && retval ){ + + ds_bmap = (struct ext2fs_struct_loc_generic_bitmap *) d_bmap; + block_buf = malloc(current_fs->blocksize); + if (block_buf){ + for (blk = ds_bmap->start; blk <ds_bmap->real_end; blk++){ + if (! (blk & 0x7)){ + o_blk = blk >> 3; + while ((! *(ds_bmap->bitmap + o_blk)) && (o_blk <= (ds_bmap->real_end >> 3))) + o_blk ++; + blk = o_blk << 3; + } + if (blk >= ds_bmap->real_end) + break; +//FIXME in work + if (ext2fs_test_block_bitmap ( d_bmap, blk) && (! ext2fs_test_block_bitmap( bmap, blk))){ + printf(" read block : %u\n",blk); + ret = io_channel_read_blk ( current_fs->io, blk, 1, block_buf ); + if (ret){ + fprintf(stderr,"ERROR: while read block %10u\n",blk); + } + m_result = magic_check_block(block_buf,cookie,current_fs->blocksize,blk); + } + + } + free(block_buf); + } + else + printf("can't allocate memory for blocksearch\n"); + } + clear_block_bitmap_list(d_bmap); + } + if(cookie) magic_close(cookie); + } +//FIXME only if needed +if(d_bmap) + ext2fs_free_block_bitmap(d_bmap); + +} |