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Sourcecode: e2fsprogs version File versions

inode_com.c

/*

/usr/src/ext2ed/inode_com.c

A part of the extended file system 2 disk editor.

Commands relevant to ext2_inode type.

First written on: April 9 1995

Copyright (C) 1995 Gadi Oxman

*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

#include "ext2ed.h"

void type_ext2_inode___prev (char *command_line)

{

      char *ptr,buffer [80];

      long group_num,group_offset,entry_num,block_num,first_entry,last_entry;
      long inode_num,mult=1;
      struct ext2_group_desc desc;

      ptr=parse_word (command_line,buffer);

      if (*ptr!=0) {
            ptr=parse_word (ptr,buffer);
            mult=atol (buffer);
      }

      block_num=device_offset/file_system_info.block_size;

      group_num=inode_offset_to_group_num (device_offset);
      group_offset=file_system_info.first_group_desc_offset+group_num*sizeof (struct ext2_group_desc);

      low_read ((char *) &desc,sizeof (struct ext2_group_desc),group_offset);

      entry_num=(device_offset-desc.bg_inode_table*file_system_info.block_size)/sizeof (struct ext2_inode);

      first_entry=0;last_entry=file_system_info.super_block.s_inodes_per_group-1;
      inode_num=0;

      if (entry_num-mult+1>0) {
            device_offset-=sizeof (struct ext2_inode)*mult;
            entry_num-=mult;
            
            sprintf (buffer,"setoffset %ld",device_offset);dispatch (buffer);
            strcpy (buffer,"show");dispatch (buffer);
      }

      else {
            wprintw (command_win,"Error - Entry out of limits\n");refresh_command_win ();
      }
      
      if (entry_num==0) {
            wprintw (command_win,"Reached first inode in current group descriptor\n");
            refresh_command_win ();
      }
}

void type_ext2_inode___next (char *command_line)

{

      char *ptr,buffer [80];

      long group_num,group_offset,entry_num,block_num,first_entry,last_entry;
      long inode_num,mult=1;
      struct ext2_group_desc desc;

      ptr=parse_word (command_line,buffer);
      
      if (*ptr!=0) {
            ptr=parse_word (ptr,buffer);
            mult=atol (buffer);
      }


      block_num=device_offset/file_system_info.block_size;

      group_num=inode_offset_to_group_num (device_offset);
      group_offset=file_system_info.first_group_desc_offset+group_num*sizeof (struct ext2_group_desc);

      low_read ((char *) &desc,sizeof (struct ext2_group_desc),group_offset);

      entry_num=(device_offset-desc.bg_inode_table*file_system_info.block_size)/sizeof (struct ext2_inode);

      first_entry=0;last_entry=file_system_info.super_block.s_inodes_per_group-1;
      inode_num=0;

      if (entry_num+mult-1<last_entry) {
            device_offset+=sizeof (struct ext2_inode)*mult;
            entry_num+=mult;
            
            sprintf (buffer,"setoffset %ld",device_offset);dispatch (buffer);
            strcpy (buffer,"show");dispatch (buffer);
      }

      else {
            wprintw (command_win,"Error - Entry out of limits\n");refresh_command_win ();
      }
      
      if (entry_num==last_entry) {
            wprintw (command_win,"Reached last inode in current group descriptor\n");
            refresh_command_win ();
      }
}


void type_ext2_inode___show (char *command_line)

{
      struct ext2_inode *inode_ptr;
      
      unsigned short temp;
      int i;
      
      long group_num,group_offset,entry_num,block_num,first_entry,last_entry,inode_num;
      struct ext2_group_desc desc;

      block_num=device_offset/file_system_info.block_size;

      group_num=inode_offset_to_group_num (device_offset);
      group_offset=file_system_info.first_group_desc_offset+group_num*sizeof (struct ext2_group_desc);

      low_read ((char *) &desc,sizeof (struct ext2_group_desc),group_offset);

      entry_num=(device_offset-desc.bg_inode_table*file_system_info.block_size)/sizeof (struct ext2_inode);
      first_entry=0;last_entry=file_system_info.super_block.s_inodes_per_group-1;
      inode_num=group_num*file_system_info.super_block.s_inodes_per_group+1;
      inode_num+=entry_num;

      inode_ptr=&type_data.u.t_ext2_inode;

      show (command_line);

      wmove (show_pad,0,40);wprintw (show_pad,"octal = %06o ",inode_ptr->i_mode);
      for (i=6;i>=0;i-=3) {
            temp=inode_ptr->i_mode & 0x1ff;
            temp=temp >> i;
            if (temp & 4)
                  wprintw (show_pad,"r");
            else
                  wprintw (show_pad,"-");
            
            if (temp & 2)
                  wprintw (show_pad,"w");
            else
                  wprintw (show_pad,"-");

            if (temp & 1)
                  wprintw (show_pad,"x");
            else
                  wprintw (show_pad,"-");
      }
      wmove (show_pad,3,40);wprintw (show_pad,"%s",ctime ((time_t *) &type_data.u.t_ext2_inode.i_atime));
      wmove (show_pad,4,40);wprintw (show_pad,"%s",ctime ((time_t *) &type_data.u.t_ext2_inode.i_ctime));
      wmove (show_pad,5,40);wprintw (show_pad,"%s",ctime ((time_t *) &type_data.u.t_ext2_inode.i_mtime));
      wmove (show_pad,6,40);wprintw (show_pad,"%s",ctime ((time_t *) &type_data.u.t_ext2_inode.i_dtime));

      wmove (show_pad,10,40);
      temp=inode_ptr->i_flags;
      
      if (temp & EXT2_SECRM_FL)
            wprintw (show_pad,"s");
      else
            wprintw (show_pad,"-");


      if (temp & EXT2_UNRM_FL)
            wprintw (show_pad,"u");
      else
            wprintw (show_pad,"-");

      if (temp & EXT2_COMPR_FL)
            wprintw (show_pad,"c");
      else
            wprintw (show_pad,"-");

      if (temp & EXT2_SYNC_FL)
            wprintw (show_pad,"S");
      else
            wprintw (show_pad,"-");

      if (temp & EXT2_IMMUTABLE_FL)
            wprintw (show_pad,"i");
      else
            wprintw (show_pad,"-");

      if (temp & EXT2_APPEND_FL)
            wprintw (show_pad,"a");
      else
            wprintw (show_pad,"-");

      if (temp & EXT2_NODUMP_FL)
            wprintw (show_pad,"d");
      else
            wprintw (show_pad,"-");
      
      refresh_show_pad ();

      wmove (show_win,1,0);

      wprintw (show_win,"Inode %ld of %ld. Entry %ld of %ld in group descriptor %ld.\n"
            ,inode_num,file_system_info.super_block.s_inodes_count,entry_num,last_entry,group_num);
      
      wprintw (show_win,"Inode type: ");

      if (inode_num < EXT2_GOOD_OLD_FIRST_INO) {
            switch (inode_num) {
                  case EXT2_BAD_INO:
                        wprintw (show_win,"Bad blocks inode - ");
                        break;
                  case EXT2_ROOT_INO:
                        wprintw (show_win,"Root inode - ");
                        break;
                  case EXT2_ACL_IDX_INO:
                        wprintw (show_win,"ACL index inode - ");
                        break;
                  case EXT2_ACL_DATA_INO:
                        wprintw (show_win,"ACL data inode - ");
                        break;
                  case EXT2_BOOT_LOADER_INO:
                        wprintw (show_win,"Boot loader inode - ");
                        break;
                  case EXT2_UNDEL_DIR_INO:
                        wprintw (show_win,"Undelete directory inode - ");
                        break;
                  default:
                        wprintw (show_win,"Reserved inode - ");
                        break;
            }
      }
      if (type_data.u.t_ext2_inode.i_mode==0)
            wprintw (show_win,"Free.            ");
            
      if (S_ISREG (type_data.u.t_ext2_inode.i_mode))
            wprintw (show_win,"File.            ");

      if (S_ISDIR (type_data.u.t_ext2_inode.i_mode))
            wprintw (show_win,"Directory.       ");

      if (S_ISLNK (type_data.u.t_ext2_inode.i_mode)) {
            wprintw (show_win,"Symbolic link.   ");
            wmove (show_pad,12,40);

            if (inode_ptr->i_size <= 60)
                  wprintw (show_pad,"-> %s",(char *) &type_data.u.t_ext2_inode.i_block [0]);
            else
                  wprintw (show_pad,"Slow symbolic link\n");                  
            refresh_show_pad ();
      }

      if (S_ISCHR (type_data.u.t_ext2_inode.i_mode))
            wprintw (show_win,"Character device.");

      if (S_ISBLK (type_data.u.t_ext2_inode.i_mode))
            wprintw (show_win,"Block device.    ");

      wprintw (show_win,"\n");refresh_show_win ();
      
      if (entry_num==last_entry) {
            wprintw (command_win,"Reached last inode in current group descriptor\n");
            refresh_command_win ();
      }

      if (entry_num==first_entry) {
            wprintw (command_win,"Reached first inode in current group descriptor\n");
            refresh_command_win ();
      }

}

void type_ext2_inode___entry (char *command_line)

{
      char *ptr,buffer [80];

      long group_num,group_offset,entry_num,block_num,wanted_entry;
      struct ext2_group_desc desc;

      ptr=parse_word (command_line,buffer);
      if (*ptr==0) return;
      ptr=parse_word (ptr,buffer);
      wanted_entry=atol (buffer);

      block_num=device_offset/file_system_info.block_size;

      group_num=inode_offset_to_group_num (device_offset);
      group_offset=file_system_info.first_group_desc_offset+group_num*sizeof (struct ext2_group_desc);

      low_read ((char *) &desc,sizeof (struct ext2_group_desc),group_offset);

      entry_num=(device_offset-desc.bg_inode_table*file_system_info.block_size)/sizeof (struct ext2_inode);

      if (wanted_entry > entry_num) {
            sprintf (buffer,"next %ld",wanted_entry-entry_num);
            dispatch (buffer);
      }
      
      else if (wanted_entry < entry_num) {
            sprintf (buffer,"prev %ld",entry_num-wanted_entry);
            dispatch (buffer);
      }
}

void type_ext2_inode___group (char *command_line)

{
      char buffer [80];
      
      long group_num,group_offset;
      
      group_num=inode_offset_to_group_num (device_offset);
      group_offset=file_system_info.first_group_desc_offset+group_num*sizeof (struct ext2_group_desc);
      
      sprintf (buffer,"setoffset %ld",group_offset);dispatch (buffer);
      sprintf (buffer,"settype ext2_group_desc");dispatch (buffer);
}

void type_ext2_inode___file (char *command_line)

{
      char buffer [80];
      
      if (!S_ISREG (type_data.u.t_ext2_inode.i_mode)) {
            wprintw (command_win,"Error - Inode type is not file\n");refresh_command_win ();
            return;           
      }
      
      if (!init_file_info ()) {
            wprintw (command_win,"Error - Unable to show file\n");refresh_command_win ();
            return;           
      }
      
      sprintf (buffer,"settype file");dispatch (buffer);
}

void type_ext2_inode___dir (char *command_line)

{
      char buffer [80];
      
      if (!S_ISDIR (type_data.u.t_ext2_inode.i_mode)) {
            wprintw (command_win,"Error - Inode type is not directory\n");refresh_command_win ();
            return;           
      }

/* It is very important to init first_file_info first, as search_dir_entries relies on it */    

      if (!init_dir_info (&first_file_info)) {
            wprintw (command_win,"Error - Unable to show directory\n");refresh_command_win ();
            return;           
      }
      
      file_info=first_file_info;
      
      sprintf (buffer,"settype dir");dispatch (buffer);
}

long inode_offset_to_group_num (long inode_offset)

{
      int found=0;
      struct ext2_group_desc desc;
      
      long block_num,group_offset,group_num;
      
      block_num=inode_offset/file_system_info.block_size;

      group_offset=file_system_info.first_group_desc_offset;
      group_num=(group_offset-file_system_info.first_group_desc_offset)/sizeof (struct ext2_group_desc);

      while (!found && group_num>=0 && group_num<file_system_info.groups_count) {
            low_read ((char *) &desc,sizeof (struct ext2_group_desc),group_offset);
            if (block_num>=desc.bg_inode_table && block_num<desc.bg_inode_table+file_system_info.blocks_per_group)
                  found=1;
            else
                  group_offset+=sizeof (struct ext2_group_desc);
            group_num=(group_offset-file_system_info.first_group_desc_offset)/sizeof (struct ext2_group_desc);
      }
      
      if (!found)
            return (-1);

      return (group_num);
}

 

long int inode_offset_to_inode_num (long inode_offset)

{
      long group_num,group_offset,entry_num,block_num,first_entry,last_entry,inode_num;
      struct ext2_group_desc desc;

      block_num=inode_offset/file_system_info.block_size;

      group_num=inode_offset_to_group_num (inode_offset);
      group_offset=file_system_info.first_group_desc_offset+group_num*sizeof (struct ext2_group_desc);

      low_read ((char *) &desc,sizeof (struct ext2_group_desc),group_offset);

      entry_num=(inode_offset-desc.bg_inode_table*file_system_info.block_size)/sizeof (struct ext2_inode);
      first_entry=0;last_entry=file_system_info.super_block.s_inodes_per_group-1;
      inode_num=group_num*file_system_info.super_block.s_inodes_per_group+1;
      inode_num+=entry_num;
      
      return (inode_num);
}

long int inode_num_to_inode_offset (long inode_num)

{
      long group_num,group_offset,inode_offset,inode_entry;
      struct ext2_group_desc desc;

      inode_num--;
      
      group_num=inode_num/file_system_info.super_block.s_inodes_per_group;
      inode_entry=inode_num%file_system_info.super_block.s_inodes_per_group;
      group_offset=file_system_info.first_group_desc_offset+group_num*sizeof (struct ext2_group_desc);
      low_read ((char *) &desc,sizeof (struct ext2_group_desc),group_offset);

      inode_offset=desc.bg_inode_table*file_system_info.block_size+inode_entry*sizeof (struct ext2_inode);

      return (inode_offset);
}

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