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C/C++ Source or Header  |  1995-08-24  |  5KB  |  183 lines
  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. }
  183.