pjht/ext2_parser
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pjht 2018-11-10 17:28:25 -06:00
parent eaa7af6586
commit 7e632f51bd
5 changed files with 139 additions and 135 deletions
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1
.gitignore vendored
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*.o
ext2prsr

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ext2.img
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ext2_structs.h Normal file
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#ifndef EXT2_STRUCTS_H
#define EXT2_STRUCTS_H
typedef struct {
uint32_t s_inodes_count;
uint32_t s_blocks_count;
uint32_t s_r_blocks_count;
uint32_t s_free_blocks_count;
uint32_t s_free_inodes_count;
uint32_t s_first_data_block;
uint32_t s_log_blk_size;
uint32_t s_log_frag_size;
uint32_t s_blocks_per_group;
uint32_t s_frags_per_group;
uint32_t s_inodes_per_group;
uint32_t s_mtime;
uint32_t s_wtime;
uint16_t s_mnt_count;
uint16_t s_max_mnt_count;
uint16_t s_magic;
uint16_t s_state;
uint16_t s_errors;
uint16_t s_minor_rev_level;
uint32_t s_lastcheck;
uint32_t s_checkinterval;
uint32_t s_creator_os;
uint32_t s_rev_level;
uint16_t s_def_resuid;
uint16_t s_def_resgid;
uint32_t s_first_ino;
uint16_t s_inode_size;
uint16_t s_block_group_nr;
uint32_t s_feature_compat;
uint32_t s_feature_incompat;
uint32_t s_feature_ro_compat;
char s_uuid[16];
char s_volume_name[16];
char s_last_mounted[64];
uint32_t s_algo_bitmap;
char s_prealloc_blocks;
char s_prealloc_dir_blocks;
char s_journal_uuid[16];
uint32_t s_journal_inum;
uint32_t s_journal_dev;
uint32_t s_last_orphan;
} __attribute__((packed)) ext2_superblock;
typedef enum {
EXT2_FEATURE_COMPAT_DIR_PREALLOC=1,
EXT2_FEATURE_COMPAT_IMAGIC_INODES=2,
EXT2_FEATURE_COMPAT_HAS_JOURNAL=4,
EXT2_FEATURE_COMPAT_EXT_ATTR=8,
EXT2_FEATURE_COMPAT_RESIZE_INO=16,
EXT2_FEATURE_COMPAT_DIR_INDEX=32
} s_feature_compat;
typedef enum {
EXT2_FEATURE_INCOMPAT_COMPRESSION=1,
EXT2_FEATURE_INCOMPAT_FILETYPE=2,
EXT2_FEATURE_INCOMPAT_RECOVER=4,
EXT2_FEATURE_INCOMPAT_JOURNAL_DEV=8
} s_feature_incompat;
typedef enum {
EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER=1,
EXT2_FEATURE_RO_COMPAT_LARGE_FILE=2,
EXT2_FEATURE_RO_COMPAT_BTREE_DIR=4
} s_feature_ro_compat;
typedef struct {
uint32_t bg_blk_bitmap;
uint32_t bg_inode_bitmap;
uint32_t bg_inode_table;
uint16_t bg_free_blocks_count;
uint16_t bg_free_inodes_count;
uint16_t bg_used_dirs_count;
char unused[14];
} __attribute__((packed)) blk_grp;
typedef struct {
uint16_t i_mode;
uint16_t i_uid;
uint32_t i_size;
uint32_t i_atime;
uint32_t i_ctime;
uint32_t i_mtime;
uint32_t i_dtime;
uint16_t i_gid;
uint16_t i_links_count;
uint32_t i_blocks;
uint32_t i_flags;
uint32_t i_osd1;
uint32_t i_block[15];
uint32_t i_generation;
uint32_t i_file_acl;
uint32_t i_dir_acl;
uint32_t i_faddr;
uint32_t i_osd2;
char unused[8];
} __attribute__((packed)) inode;
typedef enum {
EXT2_S_IFIFO=0x100,
EXT2_S_IFCHR=0x2000,
EXT2_S_IFDIR=0x4000,
EXT2_S_IFBLK=0x6000,
EXT2_S_IFREG=0x8000,
EXT2_S_IFLNK=0xA000,
EXT2_S_IFSOCK=0xC000
} i_mode;
typedef enum {
EXT2_SECRM_FL=0x1,
EXT2_UNRM_FL=0x2,
EXT2_COMPR_FL=0x4,
EXT2_SYNC_FL=0x8,
EXT2_IMMUTABLE_FL=0x10,
EXT2_APPEND_FL=0x20,
EXT2_NODUMP_FL=0x40,
EXT2_NOATIME_FL=0x80,
EXT2_DIRTY_FL=0x100,
EXT2_COMPRBLK_FL=0x200,
EXT2_NOCOMPR_FL=0x400,
EXT2_ECOMPR_FL=0x800,
EXT2_BTREE_FL=0x1000,
EXT2_INDEX_FL=0x1000,
EXT2_IMAGIC_FL=0x2000,
EXT2_JOURNAL_DATA_FL=0x4000,
EXT2_RESERVED_FL=0x80000000
} i_flags;
typedef struct {
uint32_t inode;
uint16_t rec_len;
char name_len;
char file_type;
} __attribute__((packed)) dir_entry;
#endif

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ext2prsr
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main.c
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#include <stdint.h>
#include <math.h>
#include <stdlib.h>
typedef struct {
uint32_t s_inodes_count;
uint32_t s_blocks_count;
uint32_t s_r_blocks_count;
uint32_t s_free_blocks_count;
uint32_t s_free_inodes_count;
uint32_t s_first_data_block;
uint32_t s_log_blk_size;
uint32_t s_log_frag_size;
uint32_t s_blocks_per_group;
uint32_t s_frags_per_group;
uint32_t s_inodes_per_group;
uint32_t s_mtime;
uint32_t s_wtime;
uint16_t s_mnt_count;
uint16_t s_max_mnt_count;
uint16_t s_magic;
uint16_t s_state;
uint16_t s_errors;
uint16_t s_minor_rev_level;
uint32_t s_lastcheck;
uint32_t s_checkinterval;
uint32_t s_creator_os;
uint32_t s_rev_level;
uint16_t s_def_resuid;
uint16_t s_def_resgid;
uint32_t s_first_ino;
uint16_t s_inode_size;
uint16_t s_block_group_nr;
uint32_t s_feature_compat;
uint32_t s_feature_incompat;
uint32_t s_feature_ro_compat;
char s_uuid[16];
char s_volume_name[16];
char s_last_mounted[64];
uint32_t s_algo_bitmap;
char s_prealloc_blocks;
char s_prealloc_dir_blocks;
char s_journal_uuid[16];
uint32_t s_journal_inum;
uint32_t s_journal_dev;
uint32_t s_last_orphan;
} __attribute__((packed)) ext2_superblock;
typedef enum {
EXT2_FEATURE_COMPAT_DIR_PREALLOC=1,
EXT2_FEATURE_COMPAT_IMAGIC_INODES=2,
EXT2_FEATURE_COMPAT_HAS_JOURNAL=4,
EXT2_FEATURE_COMPAT_EXT_ATTR=8,
EXT2_FEATURE_COMPAT_RESIZE_INO=16,
EXT2_FEATURE_COMPAT_DIR_INDEX=32
} s_feature_compat;
typedef enum {
EXT2_FEATURE_INCOMPAT_COMPRESSION=1,
EXT2_FEATURE_INCOMPAT_FILETYPE=2,
EXT2_FEATURE_INCOMPAT_RECOVER=4,
EXT2_FEATURE_INCOMPAT_JOURNAL_DEV=8
} s_feature_incompat;
typedef enum {
EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER=1,
EXT2_FEATURE_RO_COMPAT_LARGE_FILE=2,
EXT2_FEATURE_RO_COMPAT_BTREE_DIR=4
} s_feature_ro_compat;
typedef struct {
uint32_t bg_blk_bitmap;
uint32_t bg_inode_bitmap;
uint32_t bg_inode_table;
uint16_t bg_free_blocks_count;
uint16_t bg_free_inodes_count;
uint16_t bg_used_dirs_count;
char unused[14];
} __attribute__((packed)) blk_grp;
typedef struct {
uint16_t i_mode;
uint16_t i_uid;
uint32_t i_size;
uint32_t i_atime;
uint32_t i_ctime;
uint32_t i_mtime;
uint32_t i_dtime;
uint16_t i_gid;
uint16_t i_links_count;
uint32_t i_blocks;
uint32_t i_flags;
uint32_t i_osd1;
uint32_t i_block[15];
uint32_t i_generation;
uint32_t i_file_acl;
uint32_t i_dir_acl;
uint32_t i_faddr;
uint32_t i_osd2;
char unused[8];
} __attribute__((packed)) inode;
typedef enum {
EXT2_S_IFIFO=0x100,
EXT2_S_IFCHR=0x2000,
EXT2_S_IFDIR=0x4000,
EXT2_S_IFBLK=0x6000,
EXT2_S_IFREG=0x8000,
EXT2_S_IFLNK=0xA000,
EXT2_S_IFSOCK=0xC000
} i_mode;
typedef enum {
EXT2_SECRM_FL=0x1,
EXT2_UNRM_FL=0x2,
EXT2_COMPR_FL=0x4,
EXT2_SYNC_FL=0x8,
EXT2_IMMUTABLE_FL=0x10,
EXT2_APPEND_FL=0x20,
EXT2_NODUMP_FL=0x40,
EXT2_NOATIME_FL=0x80,
EXT2_DIRTY_FL=0x100,
EXT2_COMPRBLK_FL=0x200,
EXT2_NOCOMPR_FL=0x400,
EXT2_ECOMPR_FL=0x800,
EXT2_BTREE_FL=0x1000,
EXT2_INDEX_FL=0x1000,
EXT2_IMAGIC_FL=0x2000,
EXT2_JOURNAL_DATA_FL=0x4000,
EXT2_RESERVED_FL=0x80000000
} i_flags;
typedef struct {
uint32_t inode;
uint16_t rec_len;
char name_len;
char file_type;
} __attribute__((packed)) dir_entry;
#include "ext2_structs.h"
char img[33554432];
ext2_superblock* supblk;
uint32_t blk_size;