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