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