1 /*
2
3 /usr/src/ext2ed/group_com.c
4
5 A part of the extended file system 2 disk editor.
6
7 General user commands
8
9 First written on: April 17 1995
10
11 Copyright (C) 1995 Gadi Oxman
12
13 */
14
15 #include <stdio.h>
16 #include <stdlib.h>
17 #include <string.h>
18
19 #include "ext2ed.h"
20
type_ext2_group_desc___next(char * command_line)21 void type_ext2_group_desc___next (char *command_line)
22
23 {
24 long entry_offset=1;
25 char *ptr,buffer [80];
26
27 ptr=parse_word (command_line,buffer);
28 if (*ptr!=0) {
29 ptr=parse_word (ptr,buffer);
30 entry_offset=atol (buffer);
31 }
32
33 sprintf (buffer,"entry %ld",group_info.group_num+entry_offset);
34 dispatch (buffer);
35 }
36
type_ext2_group_desc___prev(char * command_line)37 void type_ext2_group_desc___prev (char *command_line)
38
39 {
40 long entry_offset=1;
41 char *ptr,buffer [80];
42
43 ptr=parse_word (command_line,buffer);
44 if (*ptr!=0) {
45 ptr=parse_word (ptr,buffer);
46 entry_offset=atol (buffer);
47 }
48
49 sprintf (buffer,"entry %ld",group_info.group_num-entry_offset);
50 dispatch (buffer);
51 }
52
type_ext2_group_desc___entry(char * command_line)53 void type_ext2_group_desc___entry (char *command_line)
54
55 {
56 long group_num;
57 char *ptr,buffer [80];
58
59 ptr=parse_word (command_line,buffer);
60 if (*ptr==0) {
61 wprintw (command_win,"Error - No argument specified\n");refresh_command_win ();return;
62 }
63 ptr=parse_word (ptr,buffer);
64
65 group_num=atol (buffer);
66
67 if (group_num < 0 || group_num >= file_system_info.groups_count) {
68 wprintw (command_win,"Error - Entry number out of bounds\n");refresh_command_win ();return;
69 }
70
71 device_offset=file_system_info.first_group_desc_offset+group_num*sizeof (struct ext2_group_desc);
72
73 sprintf (buffer,"setoffset %ld",device_offset);dispatch (buffer);
74 strcpy (buffer,"show");dispatch (buffer);
75 group_info.group_num=group_num;
76 }
77
78
type_ext2_group_desc___gocopy(char * command_line)79 void type_ext2_group_desc___gocopy (char *command_line)
80
81 {
82 unsigned long copy_num,offset;
83 char *ptr,buffer [80];
84
85 ptr=parse_word (command_line,buffer);
86 if (*ptr==0) {
87 wprintw (command_win,"Error - No argument specified\n");refresh_command_win ();return;
88 }
89 ptr=parse_word (ptr,buffer);
90
91 copy_num=atol (buffer);
92
93 offset=file_system_info.first_group_desc_offset+copy_num*file_system_info.super_block.s_blocks_per_group*file_system_info.block_size;
94
95 if (offset > file_system_info.file_system_size) {
96 wprintw (command_win,"Error - Copy number out of bounds\n");refresh_command_win ();return;
97 }
98
99 group_info.copy_num=copy_num;
100 device_offset=offset+group_info.group_num*sizeof (struct ext2_group_desc);
101
102 sprintf (buffer,"setoffset %ld",device_offset);dispatch (buffer);
103 strcpy (buffer,"show");dispatch (buffer);
104 }
105
106
type_ext2_group_desc___show(char * command_line)107 void type_ext2_group_desc___show (char *command_line)
108
109 {
110 long group_num,temp;
111
112 temp=(device_offset-file_system_info.first_group_desc_offset) % (file_system_info.super_block.s_blocks_per_group*file_system_info.block_size);
113 group_num=temp/sizeof (struct ext2_group_desc);
114
115 show (command_line);
116
117 wmove (show_win,1,0);wprintw (show_win,"\n");wmove (show_win,2,0);
118 wprintw (show_win,"Group %ld of %ld ",group_num,file_system_info.groups_count-1);
119 wprintw (show_win,"in copy %ld ",group_info.copy_num);
120 if (group_info.copy_num==0) wprintw (show_win,"(Main copy)");
121 wprintw (show_win,"\n");refresh_show_win ();
122
123 if (group_num==0) {
124 wprintw (command_win,"Reached first group descriptor\n");
125 wrefresh (command_win);
126 }
127
128 if (group_num==file_system_info.groups_count-1) {
129 wprintw (command_win,"Reached last group descriptor\n");
130 wrefresh (command_win);
131 }
132 }
133
type_ext2_group_desc___inode(char * command_line)134 void type_ext2_group_desc___inode (char *command_line)
135
136 {
137 long inode_offset;
138 char buffer [80];
139
140 inode_offset=type_data.u.t_ext2_group_desc.bg_inode_table;
141 sprintf (buffer,"setoffset block %ld",inode_offset);dispatch (buffer);
142 sprintf (buffer,"settype ext2_inode");dispatch (buffer);
143 }
144
type_ext2_group_desc___blockbitmap(char * command_line)145 void type_ext2_group_desc___blockbitmap (char *command_line)
146
147 {
148 long block_bitmap_offset;
149 char buffer [80];
150
151 block_bitmap_info.entry_num=0;
152 block_bitmap_info.group_num=group_info.group_num;
153
154 block_bitmap_offset=type_data.u.t_ext2_group_desc.bg_block_bitmap;
155 sprintf (buffer,"setoffset block %ld",block_bitmap_offset);dispatch (buffer);
156 sprintf (buffer,"settype block_bitmap");dispatch (buffer);
157 }
158
type_ext2_group_desc___inodebitmap(char * command_line)159 void type_ext2_group_desc___inodebitmap (char *command_line)
160
161 {
162 long inode_bitmap_offset;
163 char buffer [80];
164
165 inode_bitmap_info.entry_num=0;
166 inode_bitmap_info.group_num=group_info.group_num;
167
168 inode_bitmap_offset=type_data.u.t_ext2_group_desc.bg_inode_bitmap;
169 sprintf (buffer,"setoffset block %ld",inode_bitmap_offset);dispatch (buffer);
170 sprintf (buffer,"settype inode_bitmap");dispatch (buffer);
171 }
172
type_ext2_group_desc___setactivecopy(char * command_line)173 void type_ext2_group_desc___setactivecopy (char *command_line)
174
175 {
176 struct ext2_group_desc gd;
177
178 gd=type_data.u.t_ext2_group_desc;
179 dispatch ("gocopy 0");
180 type_data.u.t_ext2_group_desc=gd;
181 dispatch ("show");
182 }
183