Minix2.0/src/commands/de/de.h
/****************************************************************/
/* */
/* de.h */
/* */
/* Definitions for the "Disk editor". */
/* */
/****************************************************************/
/* origination 1989-Jan-15 Terrence W. Holm */
/****************************************************************/
/****************************************************************/
/* */
/* de(1) */
/* */
/* This is the MINIX disk editor. It allows the user to */
/* observe and modify a file system. It can also be used */
/* to recover unlink(2)'ed files */
/* */
/* See the de(1) man page. */
/* */
/****************************************************************/
/****************************************************************/
/* */
/* de Copyright Terrence W. Holm 1989 */
/* */
/* This program was written for users of the Minix operating */
/* system, and in the spirit of other public domain software */
/* written for said system, this source code is made available */
/* at no cost to everyone. I assume no responsibility for */
/* damage to file systems caused by this program. */
/* */
/* This program (one .h, five .c's and a "man" page) may be */
/* copied and/or modified subject to (1) no charge must be */
/* made for distribution, other than for the medium, (2) all */
/* modified sources must be clearly marked as such, (3) all */
/* sources must carry this copyright. */
/* */
/****************************************************************/
/****************************************************************/
/* */
/* files */
/* */
/* de.h Definitions */
/* de.c The main loop */
/* de_stdin.c Character input routines */
/* de_stdout.c Output routines */
/* de_diskio.c File system read/write */
/* de_recover.c File restoration routines */
/* */
/* de.1 "Man" page */
/* Makefile For "make" */
/* README Installation help */
/* */
/* */
/* fs/path.c was modified to support the 'x' command. */
/* fs/link.c and fs/open.c were changed for 'X'. */
/* */
/****************************************************************/
#undef printf
#include <stdio.h>
/* General constants */
#define MAX_STRING 60 /* For all input lines */
#define MAX_PREV 8 /* For 'p' command */
#define SEARCH_BUFFER (4*K) /* For '/' and 'n' */
/* Files */
#define TMP "/tmp" /* For "-r" output */
#define DEV "/dev" /* Where devices are */
/* a.out header constants (see a.out.h, if you have it) */
#if (CHIP == INTEL)
#define A_OUT 0x0301
#define SPLIT 0x0420
#endif
#if (CHIP == M68000)
#define A_OUT 0x0301
#define SPLIT 0x0B20
#endif
#if (CHIP == SPARC)
#define A_OUT 0x0301
#define SPLIT 0x0B20
#endif
/* Each buffer is 1k. In WORD mode 16 words (32 bytes) can be */
/* displayed at once. In BLOCK mode 1K bytes can be displayed. */
/* In MAP mode 2048 bits (256 bytes) are displayed. */
#define K 1024 /* STD_BLK */
#define K_MASK (~(K-1)) /* Round to K boundary */
#define K_SHIFT 10 /* Ie. 1<<10 = K */
#define PAGE_MASK 0x1f /* Word mode: 32 bytes */
#define PAGE_SHIFT 5 /* Ie. 1<<5 = 32 */
#define MAP_BITS_PER_BLOCK (8 * K) /* 1k block, 8192 bits */
#define MAP_MASK 0xff /* 256 bytes/screen */
/* Terminal i/o codes */
#define CTRL_D '\004' /* ASCII ^D */
#define BELL '\007' /* ASCII bell code */
#define BS '\010' /* ASCII back space */
#define CTRL_U '\025' /* ASCII ^U */
#define ESCAPE '\033' /* ASCII escape code */
#define DEL '\177' /* ASCII delete code */
/* Input escape codes generated by the Minix console. */
/* Format: ESC [ X. */
#define ESC_HOME ('H' + 0x80)
#define ESC_UP ('A' + 0x80)
#define ESC_PGUP ('V' + 0x80)
#define ESC_LEFT ('D' + 0x80)
#define ESC_5 ('G' + 0x80)
#define ESC_RIGHT ('C' + 0x80)
#define ESC_END ('Y' + 0x80)
#define ESC_DOWN ('B' + 0x80)
#define ESC_PGDN ('U' + 0x80)
#define ESC_PLUS ('T' + 0x80)
#define ESC_MINUS ('S' + 0x80)
/* Graphic box codes - only applicable for console display */
/* in visual mode "map". */
#if (CHIP == INTEL)
#define BOX_CLR ' ' /* Empty box */
#define BOX_ALL '\333' /* Filled box */
#define BOX_TOP '\337' /* Filled upper half */
#define BOX_BOT '\334' /* Filled lower half */
#endif
#if (CHIP == M68000)
/* Please change these. */
#define BOX_CLR ' ' /* Empty box */
#define BOX_ALL '=' /* Filled box */
#define BOX_TOP '-' /* Filled upper half */
#define BOX_BOT '_' /* Filled lower half */
#endif
#if (CHIP == SPARC)
/* Please change these. */
#define BOX_CLR ' ' /* Empty box */
#define BOX_ALL '=' /* Filled box */
#define BOX_TOP '-' /* Filled upper half */
#define BOX_BOT '_' /* Filled lower half */
#endif
/* Move positions for the output display. */
#define STATUS_COLUMN 2
#define STATUS_LINE 0
#define BLOCK_COLUMN 4
#define BLOCK_LINE 4
#define INFO_COLUMN 30
#define INFO_LINE BLOCK_LINE
#define PROMPT_COLUMN 0
#define PROMPT_LINE 23
#define WARNING_COLUMN 5
#define WARNING_LINE 10
/* Values returned by Process() and Get_Filename() */
#define OK 0 /* No update required */
#define REDRAW 1 /* Redraw whole screen */
#define REDRAW_POINTERS 2 /* Redraw just ptrs */
#define ERROR 3 /* Beep */
/* Visual modes */
#define WORD 1
#define BLOCK 2
#define MAP 3
typedef unsigned short word_t; /* For most user i/o */
#if _WORD_SIZE == 2
typedef unsigned int Word_t; /* What it should always be */
#else
typedef int Word_t; /* Unsigned promotion under ANSI C */
#endif
#ifndef I_MAP_SLOTS
/* Max number of inode and zone map blocks we can handle. */
#define I_MAP_SLOTS 8
#define Z_MAP_SLOTS (sizeof(char *) == 2 ? 16 : 128)
#endif
typedef struct de_state /* State of disk ed. */
{
/* Information from super block */
/* The types here are mostly promoted types for simplicity */
/* and efficiency. */
unsigned inodes; /* Number of i-nodes */
zone_t zones; /* Total # of blocks */
unsigned inode_maps; /* I-node map blocks */
unsigned zone_maps; /* Zone map blocks */
unsigned inode_blocks; /* I-node blocks */
unsigned first_data; /* Total non-data blks */
int magic; /* Magic number */
/* Numbers derived from the magic number */
unsigned char is_fs; /* Nonzero for good fs */
unsigned char v1; /* Nonzero for V1 fs */
unsigned inode_size; /* Size of disk inode */
unsigned nr_indirects; /* # indirect blocks */
unsigned zone_num_size; /* Size of disk z num */
/* Other derived numbers */
bit_t inodes_in_map; /* Bits in i-node map */
bit_t zones_in_map; /* Bits in zone map */
int ndzones; /* # direct zones in an inode */
/* Information from map blocks */
bitchunk_t inode_map[ I_MAP_SLOTS * K / sizeof (bitchunk_t) ];
bitchunk_t zone_map[ Z_MAP_SLOTS * K / sizeof (bitchunk_t) ];
/* Information for current block */
off_t address; /* Current address */
off_t last_addr; /* For erasing ptrs */
zone_t block; /* Current block (1K) */
unsigned offset; /* Offset within block */
char buffer[ K ];
/* Display state */
int mode; /* WORD, BLOCK or MAP */
int output_base; /* 2, 8, 10, or 16 */
/* Search information */
char search_string[ MAX_STRING + 1 ]; /* For '/' and 'n' */
off_t prev_addr[ MAX_PREV ]; /* For 'p' command */
int prev_mode[ MAX_PREV ];
/* File information */
char *device_name; /* From command line */
int device_d;
int device_mode; /* O_RDONLY or O_RDWR */
zone_t device_size; /* Number of blocks */
char file_name[ MAX_STRING + 1 ]; /* For 'w' and 'W' */
FILE *file_f;
int file_written; /* Flag if written to */
} de_state;
/* Forward references for external routines */
/* de.c */
_PROTOTYPE(void main , (int argc , char *argv []));
_PROTOTYPE(int Process , (de_state *s , int c ));
#if __STDC__
void Error( const char *text, ... );
#else
void Error();
#endif
_PROTOTYPE(int In_Use , (bit_t bit , bitchunk_t *map ));
_PROTOTYPE(ino_t Find_Inode , (de_state *s , char *filename ));
/* de_stdin.c */
_PROTOTYPE(void Save_Term , (void));
_PROTOTYPE(void Set_Term , (void));
_PROTOTYPE(void Reset_Term , (void));
_PROTOTYPE(int Get_Char , (void));
_PROTOTYPE(char *Get_Line , (void));
_PROTOTYPE(int Arrow_Esc , (int c ));
/* de_stdout.c */
_PROTOTYPE(int Init_Termcap , (void));
_PROTOTYPE(void Draw_Help_Screen , (de_state *s ));
_PROTOTYPE(void Wait_For_Key , (void));
_PROTOTYPE(void Draw_Prompt , (char *string ));
_PROTOTYPE(void Erase_Prompt , (void));
_PROTOTYPE(void Draw_Screen , (de_state *s ));
_PROTOTYPE(void Draw_Strings , (de_state *s ));
_PROTOTYPE(void Draw_Pointers , (de_state *s ));
_PROTOTYPE(void Print_Ascii , (int c ));
_PROTOTYPE(void Goto , (int column , int line ));
_PROTOTYPE(void Block_Type , (de_state *s ));
_PROTOTYPE(void Draw_Words , (de_state *s ));
_PROTOTYPE(void Draw_Info , (de_state *s ));
_PROTOTYPE(void Draw_Block , (char *block ));
_PROTOTYPE(void Draw_Map , (char *block , int max_bits ));
_PROTOTYPE(void Draw_Offset , (de_state *s ));
_PROTOTYPE(void Word_Pointers , (off_t old_addr , off_t new_addr ));
_PROTOTYPE(void Block_Pointers , (off_t old_addr , off_t new_addr ));
_PROTOTYPE(void Map_Pointers , (off_t old_addr , off_t new_addr ));
_PROTOTYPE(void Print_Number , (Word_t number , int output_base ));
_PROTOTYPE(void Draw_Zone_Numbers , (de_state *s , struct inode *inode ,
int zindex , int zrow ));
#if __STDC__
void Warning( const char *text, ... );
#else
void Warning();
#endif
/* de_diskio.c */
_PROTOTYPE(void Read_Disk , (de_state *s , off_t block_addr , char *buffer ));
_PROTOTYPE(void Read_Block , (de_state *s , char *buffer ));
_PROTOTYPE(void Read_Super_Block , (de_state *s ));
_PROTOTYPE(void Read_Bit_Maps , (de_state *s ));
_PROTOTYPE(off_t Search , (de_state *s , char *string ));
_PROTOTYPE(void Write_Word , (de_state *s , Word_t word ));
/* de_recover.c */
_PROTOTYPE(int Path_Dir_File , (char *path_name , char **dir_name ,
char **file_name ));
_PROTOTYPE(char *File_Device , (char *file_name ));
_PROTOTYPE(ino_t Find_Deleted_Entry , (de_state *s , char *path_name ));
_PROTOTYPE(off_t Recover_Blocks , (de_state *s ));
#undef printf /* Because fs/const.h */
/* defines it. */
/* Static functions are all pre-declared FORWARD but none are */
/* declared static yet - this can wait until all functions are */
/* declared with prototypes. */
#undef FORWARD
#define FORWARD /* static */