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A part of the extended file system 2 disk editor.
Include file for the ext2 disk editor.
This file contains declarations which are needed by all the files in ext2ed.
First written on: April 9 1995
Copyright (C) 1995 Gadi Oxman
User definable options
#define DEBUG /* Activate self-sanity checks */
#include <ext2fs/ext2_fs.h> /* Main kernel ext2 include file */
#include <sys/stat.h>
#include <ncurses.h>
#define MAX_FIELDS 400
#define MAX_COMMANDS_NUM 30 /* Maximum number of commands of one type */
#define REMEMBER_COUNT 30 /* Object memory size */
The user screen consists of four parts:
1. Title window (title_win).
2. Show (status) window (show_win).
3. Main show pad (show_pad).
4. Command window (command_win).
The show pad is mapped to the space left between the other three windows.
If you wondered why ext2ed grabs so memory, the answer is probably below - I wanted to treat
the virtual display as infinite. Decrease the following for more realistic memory consumption.
#define SHOW_PAD_LINES 3000
#define SHOW_PAD_COLS (COLS > 140 ? COLS : 140)
#define COMMAND_WIN_LINES 6 /* Change this to your preferences */
#define SHOW_WIN_LINES 3
#define HEX 1
#define TEXT 2
#ifndef EXT2_PRE_02B_MAGIC
#define EXT2_PRE_02B_MAGIC 0xEF51
typedef void (*PF) (char *); /* Used to point to the dispatched functions */
struct struct_commands { /* Holds commands of an object */
int last_command;
char *names [MAX_COMMANDS_NUM];
char *descriptions [MAX_COMMANDS_NUM];
struct struct_descriptor { /* Describes an object */
unsigned long length;
unsigned char name [60];
unsigned short fields_num;
unsigned char field_names [MAX_FIELDS][80];
unsigned char field_types [MAX_FIELDS];
unsigned short field_lengths [MAX_FIELDS];
unsigned short field_positions [MAX_FIELDS];
struct struct_commands type_commands;
struct struct_descriptor *prev,*next;
#define FIELD_TYPE_INT 1
struct struct_type_data { /* The object's data is usually here */
long offset_in_block;
union union_type_data { /* Format it in various ways */
char buffer [EXT2_MAX_BLOCK_SIZE];
struct ext2_acl_header t_ext2_acl_header;
struct ext2_acl_entry t_ext2_acl_entry;
struct ext2_group_desc t_ext2_group_desc;
struct ext2_inode t_ext2_inode;
struct ext2_super_block t_ext2_super_block;
struct ext2_dir_entry t_ext2_dir_entry;
} u;
struct struct_file_system_info { /* Important information about the filesystem */
unsigned long long file_system_size;
unsigned long super_block_offset;
unsigned long first_group_desc_offset;
unsigned long groups_count;
unsigned long inodes_per_block;
unsigned long blocks_per_group; /* The name is misleading; beware */
unsigned long no_blocks_in_group;
unsigned short block_size;
struct ext2_super_block super_block;
struct struct_file_info { /* Used to handle files and directories */
struct ext2_inode *inode_ptr;
long inode_offset;
long global_block_num,global_block_offset;
long block_num,blocks_count;
long file_offset,file_length;
long level;
unsigned char buffer [EXT2_MAX_BLOCK_SIZE];
long offset_in_block;
int display;
/* The following is used if the file is a directory */
long dir_entry_num,dir_entries_count;
long dir_entry_offset;
struct struct_super_info { /* Used to handle the superblock */
unsigned long copy_num;
struct struct_group_info { /* Used to handle the group descriptors */
unsigned long copy_num;
unsigned long group_num;
struct struct_block_bitmap_info { /* Used in blockbitmap_com.c */
unsigned long entry_num;
unsigned long group_num;
struct struct_inode_bitmap_info { /* Used in inodebitmap_com.c */
unsigned long entry_num;
unsigned long group_num;
struct struct_remember_lifo { /* Implements the objects circular memory */
long entries_count;
long offset [REMEMBER_COUNT];
struct struct_descriptor *type [REMEMBER_COUNT];
char name [REMEMBER_COUNT][80];
struct struct_pad_info { /* Used to zoom into the pad window */
int display_lines,display_cols;
int line,col;
int max_line,max_col;
int disable_output;
/* Global variables (defined mostly in main.c) */
/* Configurable variables (Through configuration file) */
extern char AlternateDescriptors [200];
extern char Ext2Descriptors [200];
extern char LogFile [200];
extern int LogChanges;
extern int AllowChanges;
extern int AllowMountedRead;
extern int ForceExt2;
extern int DefaultBlockSize;
extern unsigned long DefaultTotalBlocks;
extern unsigned long DefaultBlocksInGroup;
extern int ForceDefault;
extern char device_name [80];
extern char last_command_line [80];
extern FILE *device_handle;
extern long device_offset;
extern int mounted;
extern short block_size;
extern struct struct_commands general_commands;
extern struct struct_commands ext2_commands;
extern struct struct_descriptor *first_type;
extern struct struct_descriptor *last_type;
extern struct struct_descriptor *current_type;
extern struct struct_type_data type_data;
extern struct struct_file_system_info file_system_info;
extern struct struct_file_info file_info,first_file_info;
extern struct struct_group_info group_info;
extern struct struct_super_info super_info;
extern struct struct_block_bitmap_info block_bitmap_info;
extern struct struct_inode_bitmap_info inode_bitmap_info;
extern struct struct_remember_lifo remember_lifo;
extern struct struct_pad_info show_pad_info;
extern int write_access;
extern int redraw_request;
extern char lines_s [80];
extern char cols_s [80];
/* init.c */
extern int init (void);
extern void prepare_to_close (void);
extern int set_struct_descriptors (char *file_name);
extern void free_struct_descriptors (void);
extern struct struct_descriptor *add_new_descriptor (char *name);
extern void add_new_variable (struct struct_descriptor *descriptor,char *v_type,char *v_name);
extern void fill_type_commands (struct struct_descriptor *ptr);
extern void add_user_command (struct struct_commands *ptr,char *name,char *description,PF callback);
extern void free_user_commands (struct struct_commands *ptr);
extern int set_file_system_info (void);
extern int process_configuration_file (void);
extern void add_general_commands (void);
extern void add_ext2_general_commands (void);
extern void check_mounted (char *name);
int get_next_option (FILE *fp,char *option,char *value);
void init_readline (void);
void init_signals (void);
void signal_SIGWINCH_handler (int sig_num);
void signal_SIGTERM_handler (int sig_num);
void signal_SIGSEGV_handler (int sig_num);
/* general_com.c */
/* General commands which are aviable always */
extern void help (char *command_line);
extern void set (char *command_line);
extern void set_device (char *command_line);
extern void set_offset (char *command_line);
extern void set_type (char *command_line);
extern void show (char *command_line);
extern void pgup (char *command_line);
extern void pgdn (char *command_line);
extern void redraw (char *command_line);
extern void remember (char *command_line);
extern void recall (char *command_line);
extern void cd (char *command_line);
extern void enable_write (char *command_line);
extern void disable_write (char *command_line);
extern void write_data (char *command_line);
extern void next (char *command_line);
extern void prev (char *command_line);
void hex_set (char *command_line);
void detailed_help (char *text);
/* ext2_com.c */
/* Extended2 filesystem genereal commands - Aviable only when editing an
ext2 filesystem */
extern void type_ext2___super (char *command_line);
extern void type_ext2___group (char *command_line);
extern void type_ext2___cd (char *command_line);
/* main.c */
extern int version_major,version_minor;
extern char revision_date [80];
extern char email_address [80];
#ifdef DEBUG
extern void internal_error (char *description,char *source_name,char *function_name);
void parser (void);
extern int dispatch (char *command_line);
char *parse_word (char *source,char *dest);
char *complete_command (char *text,int state);
char *dupstr (char *src);
/* disk.c */
extern int load_type_data (void);
extern int write_type_data (void);
extern int low_read (unsigned char *buffer,unsigned long length,unsigned long offset);
extern int low_write (unsigned char *buffer,unsigned long length,unsigned long offset);
extern int log_changes (unsigned char *buffer,unsigned long length,unsigned long offset);
/* file_com.c */
extern int init_file_info (void);
extern void type_file___show (char *command_line);
extern void type_file___inode (char *command_line);
extern void type_file___display (char *command_line);
extern void type_file___prev (char *command_line);
extern void type_file___next (char *command_line);
extern void type_file___offset (char *command_line);
extern void type_file___prevblock (char *command_line);
extern void type_file___nextblock (char *command_line);
extern void type_file___block (char *command_line);
extern void type_file___remember (char *command_line);
extern void type_file___set (char *command_line);
extern void type_file___writedata (char *command_line);
extern long file_block_to_global_block (long file_block,struct struct_file_info *file_info_ptr);
extern long return_indirect (long table_block,long block_num);
extern long return_dindirect (long table_block,long block_num);
extern long return_tindirect (long table_block,long block_num);
void file_show_hex (void);
void file_show_text (void);
void show_status (void);
/* inode_com.c */
extern void type_ext2_inode___next (char *command_line);
extern void type_ext2_inode___prev (char *command_line);
extern void type_ext2_inode___show (char *command_line);
extern void type_ext2_inode___group (char *command_line);
extern void type_ext2_inode___entry (char *command_line);
extern void type_ext2_inode___file (char *command_line);
extern void type_ext2_inode___dir (char *command_line);
extern long inode_offset_to_group_num (long inode_offset);
extern long int inode_offset_to_inode_num (long inode_offset);
extern long int inode_num_to_inode_offset (long inode_num);
/* dir_com.c */
extern int init_dir_info (struct struct_file_info *info);
extern void type_dir___show (char *command_line);
extern void type_dir___inode (char *command_line);
extern void type_dir___pgdn (char *command_line);
extern void type_dir___pgup (char *command_line);
extern void type_dir___prev (char *command_line);
extern void type_dir___next (char *command_line);
extern void type_dir___followinode (char *command_line);
extern void type_dir___remember (char *command_line);
extern void type_dir___cd (char *command_line);
extern void type_dir___entry (char *command_line);
extern void type_dir___writedata (char *command_line);
extern void type_dir___set (char *command_line);
#define HEX 1
#define TEXT 2
#define ABORT 0
#define CONTINUE 1
#define FOUND 2
struct struct_file_info search_dir_entries (int (*action) (struct struct_file_info *info),int *status);
int action_count (struct struct_file_info *info);
void show_dir_status (void);
long count_dir_entries (void);
int action_name (struct struct_file_info *info);
int action_entry_num (struct struct_file_info *info);
int action_show (struct struct_file_info *info);
/* super_com.c */
extern void type_ext2_super_block___show (char *command_line);
extern void type_ext2_super_block___gocopy (char *command_line);
extern void type_ext2_super_block___setactivecopy (char *command_line);
/* group_com.c */
extern void type_ext2_group_desc___next (char *command_line);
extern void type_ext2_group_desc___prev (char *command_line);
extern void type_ext2_group_desc___entry (char *command_line);
extern void type_ext2_group_desc___show (char *command_line);
extern void type_ext2_group_desc___inode (char *command_line);
extern void type_ext2_group_desc___gocopy (char *command_line);
extern void type_ext2_group_desc___blockbitmap (char *command_line);
extern void type_ext2_group_desc___inodebitmap (char *command_line);
extern void type_ext2_group_desc___setactivecopy (char *command_line);
/* blockbitmap_com.c */
extern void type_ext2_block_bitmap___show (char *command_line);
extern void type_ext2_block_bitmap___entry (char *command_line);
extern void type_ext2_block_bitmap___next (char *command_line);
extern void type_ext2_block_bitmap___prev (char *command_line);
extern void type_ext2_block_bitmap___allocate (char *command_line);
extern void type_ext2_block_bitmap___deallocate (char *command_line);
void allocate_block (long entry_num);
void deallocate_block (long entry_num);
/* inodebitmap_bom.c */
extern void type_ext2_inode_bitmap___show (char *command_line);
extern void type_ext2_inode_bitmap___entry (char *command_line);
extern void type_ext2_inode_bitmap___next (char *command_line);
extern void type_ext2_inode_bitmap___prev (char *command_line);
extern void type_ext2_inode_bitmap___allocate (char *command_line);
extern void type_ext2_inode_bitmap___deallocate (char *command_line);
void allocate_inode (long entry_num);
void deallocate_inode (long entry_num);
/* win.c */
extern WINDOW *title_win,*show_win,*command_win,*show_pad;
extern void init_windows (void);
extern void refresh_title_win (void);
extern void refresh_show_win (void);
extern void refresh_show_pad (void);
extern void refresh_command_win (void);
extern void show_info (void);
extern void redraw_all (void);
extern void close_windows (void);
#endif /* EXT2ED_EDITOR_H */