source: trunk/minix/commands/de/de.h@ 10

Last change on this file since 10 was 9, checked in by Mattia Monga, 14 years ago

Minix 3.1.2a
File size: 10.7 KB
RevLine 
[9]1/****************************************************************/
2/* */
3/* de.h */
4/* */
5/* Definitions for the "Disk editor". */
6/* */
7/****************************************************************/
8/* origination 1989-Jan-15 Terrence W. Holm */
9/****************************************************************/
10
11
12/****************************************************************/
13/* */
14/* de(1) */
15/* */
16/* This is the MINIX disk editor. It allows the user to */
17/* observe and modify a file system. It can also be used */
18/* to recover unlink(2)'ed files */
19/* */
20/* See the de(1) man page. */
21/* */
22/****************************************************************/
23
24
25/****************************************************************/
26/* */
27/* de Copyright Terrence W. Holm 1989 */
28/* */
29/* This program was written for users of the Minix operating */
30/* system, and in the spirit of other public domain software */
31/* written for said system, this source code is made available */
32/* at no cost to everyone. I assume no responsibility for */
33/* damage to file systems caused by this program. */
34/* */
35/* This program (one .h, five .c's and a "man" page) may be */
36/* copied and/or modified subject to (1) no charge must be */
37/* made for distribution, other than for the medium, (2) all */
38/* modified sources must be clearly marked as such, (3) all */
39/* sources must carry this copyright. */
40/* */
41/****************************************************************/
42
43
44/****************************************************************/
45/* */
46/* files */
47/* */
48/* de.h Definitions */
49/* de.c The main loop */
50/* de_stdin.c Character input routines */
51/* de_stdout.c Output routines */
52/* de_diskio.c File system read/write */
53/* de_recover.c File restoration routines */
54/* */
55/* de.1 "Man" page */
56/* Makefile For "make" */
57/* README Installation help */
58/* */
59/* */
60/* fs/path.c was modified to support the 'x' command. */
61/* fs/link.c and fs/open.c were changed for 'X'. */
62/* */
63/****************************************************************/
64#undef printf
65#include <stdio.h>
66#include <dirent.h>
67
68/* General constants */
69
70#define MAX_STRING 60 /* For all input lines */
71#define MAX_PREV 8 /* For 'p' command */
72#define SEARCH_BUFFER (4*K) /* For '/' and 'n' */
73
74
75/* Files */
76
77#define TMP "/tmp" /* For "-r" output */
78#define DEV "/dev" /* Where devices are */
79
80
81/* a.out header constants (see a.out.h, if you have it) */
82
83#if (CHIP == INTEL)
84#define A_OUT 0x0301
85#define SPLIT 0x0420
86#endif
87
88#if (CHIP == M68000)
89#define A_OUT 0x0301
90#define SPLIT 0x0B20
91#endif
92
93#if (CHIP == SPARC)
94#define A_OUT 0x0301
95#define SPLIT 0x0B20
96#endif
97
98/* Each buffer is 1k. In WORD mode 16 words (32 bytes) can be */
99/* displayed at once. In BLOCK mode 1K bytes can be displayed. */
100/* In MAP mode 2048 bits (256 bytes) are displayed. */
101
102#define K 1024 /* STD_BLK */
103#define K_MASK (~(K-1)) /* Round to K boundary */
104#define K_SHIFT 10 /* Ie. 1<<10 = K */
105#define PAGE_MASK 0x1f /* Word mode: 32 bytes */
106#define PAGE_SHIFT 5 /* Ie. 1<<5 = 32 */
107#define MAP_BITS_PER_BLOCK (8 * K) /* 1k block, 8192 bits */
108#define MAP_MASK 0xff /* 256 bytes/screen */
109
110
111
112/* Terminal i/o codes */
113
114#define CTRL_D '\004' /* ASCII ^D */
115#define BELL '\007' /* ASCII bell code */
116#define BS '\010' /* ASCII back space */
117#define CTRL_U '\025' /* ASCII ^U */
118#define ESCAPE '\033' /* ASCII escape code */
119#define DEL '\177' /* ASCII delete code */
120
121
122/* Input escape codes generated by the Minix console. */
123/* Format: ESC [ X. */
124
125#define ESC_HOME ('H' + 0x80)
126#define ESC_UP ('A' + 0x80)
127#define ESC_PGUP ('V' + 0x80)
128#define ESC_LEFT ('D' + 0x80)
129#define ESC_5 ('G' + 0x80)
130#define ESC_RIGHT ('C' + 0x80)
131#define ESC_END ('Y' + 0x80)
132#define ESC_DOWN ('B' + 0x80)
133#define ESC_PGDN ('U' + 0x80)
134#define ESC_PLUS ('T' + 0x80)
135#define ESC_MINUS ('S' + 0x80)
136
137
138/* Graphic box codes - only applicable for console display */
139/* in visual mode "map". */
140
141#if (CHIP == INTEL)
142#define BOX_CLR ' ' /* Empty box */
143#define BOX_ALL '\333' /* Filled box */
144#define BOX_TOP '\337' /* Filled upper half */
145#define BOX_BOT '\334' /* Filled lower half */
146#endif
147
148#if (CHIP == M68000)
149/* Please change these. */
150#define BOX_CLR ' ' /* Empty box */
151#define BOX_ALL '=' /* Filled box */
152#define BOX_TOP '-' /* Filled upper half */
153#define BOX_BOT '_' /* Filled lower half */
154#endif
155
156#if (CHIP == SPARC)
157/* Please change these. */
158#define BOX_CLR ' ' /* Empty box */
159#define BOX_ALL '=' /* Filled box */
160#define BOX_TOP '-' /* Filled upper half */
161#define BOX_BOT '_' /* Filled lower half */
162#endif
163
164/* Move positions for the output display. */
165
166#define STATUS_COLUMN 2
167#define STATUS_LINE 0
168#define BLOCK_COLUMN 4
169#define BLOCK_LINE 4
170#define INFO_COLUMN 30
171#define INFO_LINE BLOCK_LINE
172#define PROMPT_COLUMN 0
173#define PROMPT_LINE 23
174#define WARNING_COLUMN 5
175#define WARNING_LINE 10
176
177
178
179/* Values returned by Process() and Get_Filename() */
180
181#define OK 0 /* No update required */
182#define REDRAW 1 /* Redraw whole screen */
183#define REDRAW_POINTERS 2 /* Redraw just ptrs */
184#define ERROR 3 /* Beep */
185
186
187/* Visual modes */
188
189#define WORD 1
190#define BLOCK 2
191#define MAP 3
192
193typedef unsigned short word_t; /* For most user i/o */
194#if _WORD_SIZE == 2
195typedef unsigned int Word_t; /* What it should always be */
196#else
197typedef int Word_t; /* Unsigned promotion under ANSI C */
198#endif
199
200#ifndef I_MAP_SLOTS
201/* Max number of inode and zone map blocks we can handle. */
202#define I_MAP_SLOTS 8
203#define Z_MAP_SLOTS (sizeof(char *) == 2 ? 16 : 128)
204#endif
205
206typedef struct de_state /* State of disk ed. */
207 {
208 /* Information from super block */
209 /* The types here are mostly promoted types for simplicity */
210 /* and efficiency. */
211
212 unsigned inodes; /* Number of i-nodes */
213 zone_t zones; /* Total # of blocks */
214 unsigned inode_maps; /* I-node map blocks */
215 unsigned zone_maps; /* Zone map blocks */
216 unsigned inode_blocks; /* I-node blocks */
217 unsigned first_data; /* Total non-data blks */
218 int magic; /* Magic number */
219
220 /* Numbers derived from the magic number */
221
222 unsigned char is_fs; /* Nonzero for good fs */
223 unsigned char v1; /* Nonzero for V1 fs */
224 unsigned inode_size; /* Size of disk inode */
225 unsigned nr_indirects; /* # indirect blocks */
226 unsigned zone_num_size; /* Size of disk z num */
227 int block_size; /* FS block size */
228
229 /* Other derived numbers */
230
231 bit_t inodes_in_map; /* Bits in i-node map */
232 bit_t zones_in_map; /* Bits in zone map */
233 int ndzones; /* # direct zones in an inode */
234
235 /* Information from map blocks */
236
237 bitchunk_t inode_map[ I_MAP_SLOTS * K / sizeof (bitchunk_t) ];
238 bitchunk_t zone_map[ Z_MAP_SLOTS * K / sizeof (bitchunk_t) ];
239
240 /* Information for current block */
241
242 off_t address; /* Current address */
243 off_t last_addr; /* For erasing ptrs */
244 zone_t block; /* Current block (1K) */
245 unsigned offset; /* Offset within block */
246
247 char buffer[ _MAX_BLOCK_SIZE ];
248
249 /* Display state */
250
251 int mode; /* WORD, BLOCK or MAP */
252 int output_base; /* 2, 8, 10, or 16 */
253
254 /* Search information */
255
256 char search_string[ MAX_STRING + 1 ]; /* For '/' and 'n' */
257 off_t prev_addr[ MAX_PREV ]; /* For 'p' command */
258 int prev_mode[ MAX_PREV ];
259
260 /* File information */
261
262 char *device_name; /* From command line */
263 int device_d;
264 int device_mode; /* O_RDONLY or O_RDWR */
265 zone_t device_size; /* Number of blocks */
266
267 char file_name[ MAX_STRING + 1 ]; /* For 'w' and 'W' */
268 FILE *file_f;
269 int file_written; /* Flag if written to */
270
271 } de_state;
272
273
274
275/* Forward references for external routines */
276
277/* de.c */
278
279_PROTOTYPE(void main , (int argc , char *argv []));
280_PROTOTYPE(int Process , (de_state *s , int c ));
281
282#if __STDC__
283void Error( const char *text, ... );
284#else
285void Error();
286#endif
287
288_PROTOTYPE(int In_Use , (bit_t bit , bitchunk_t *map ));
289_PROTOTYPE(ino_t Find_Inode , (de_state *s , char *filename ));
290
291
292/* de_stdin.c */
293
294_PROTOTYPE(void Save_Term , (void));
295_PROTOTYPE(void Set_Term , (void));
296_PROTOTYPE(void Reset_Term , (void));
297_PROTOTYPE(int Get_Char , (void));
298_PROTOTYPE(char *Get_Line , (void));
299_PROTOTYPE(int Arrow_Esc , (int c ));
300
301/* de_stdout.c */
302
303_PROTOTYPE(int Init_Termcap , (void));
304_PROTOTYPE(void Draw_Help_Screen , (de_state *s ));
305_PROTOTYPE(void Wait_For_Key , (void));
306_PROTOTYPE(void Draw_Prompt , (char *string ));
307_PROTOTYPE(void Erase_Prompt , (void));
308
309_PROTOTYPE(void Draw_Screen , (de_state *s ));
310_PROTOTYPE(void Draw_Strings , (de_state *s ));
311_PROTOTYPE(void Draw_Pointers , (de_state *s ));
312_PROTOTYPE(void Print_Ascii , (int c ));
313
314_PROTOTYPE(void Goto , (int column , int line ));
315_PROTOTYPE(void Block_Type , (de_state *s ));
316_PROTOTYPE(void Draw_Words , (de_state *s ));
317_PROTOTYPE(void Draw_Info , (de_state *s ));
318_PROTOTYPE(void Draw_Block , (char *block ));
319_PROTOTYPE(void Draw_Map , (char *block , int max_bits ));
320_PROTOTYPE(void Draw_Offset , (de_state *s ));
321_PROTOTYPE(void Word_Pointers , (off_t old_addr , off_t new_addr ));
322_PROTOTYPE(void Block_Pointers , (off_t old_addr , off_t new_addr ));
323_PROTOTYPE(void Map_Pointers , (off_t old_addr , off_t new_addr ));
324_PROTOTYPE(void Print_Number , (Word_t number , int output_base ));
325_PROTOTYPE(void Draw_Zone_Numbers , (de_state *s , struct inode *inode ,
326 int zindex , int zrow ));
327
328#if __STDC__
329void Warning( const char *text, ... );
330#else
331void Warning();
332#endif
333
334
335/* de_diskio.c */
336
337_PROTOTYPE(void Read_Disk , (de_state *s , off_t block_addr , char *buffer ));
338_PROTOTYPE(void Read_Block , (de_state *s , char *buffer ));
339_PROTOTYPE(void Read_Super_Block , (de_state *s ));
340_PROTOTYPE(void Read_Bit_Maps , (de_state *s ));
341_PROTOTYPE(off_t Search , (de_state *s , char *string ));
342_PROTOTYPE(void Write_Word , (de_state *s , Word_t word ));
343
344
345/* de_recover.c */
346
347_PROTOTYPE(int Path_Dir_File , (char *path_name , char **dir_name ,
348 char **file_name ));
349_PROTOTYPE(char *File_Device , (char *file_name ));
350_PROTOTYPE(ino_t Find_Deleted_Entry , (de_state *s , char *path_name ));
351_PROTOTYPE(off_t Recover_Blocks , (de_state *s ));
352
353
354#undef printf /* Because fs/const.h */
355 /* defines it. */
356
357
358/* Static functions are all pre-declared FORWARD but none are */
359/* declared static yet - this can wait until all functions are */
360/* declared with prototypes. */
361
362#undef FORWARD
363#define FORWARD /* static */
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