ext2ed/group_com.c

   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
  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
  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
  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
  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
 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
 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
 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
 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
 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 }