blob: 843286c5d6c61f9ec8e0c9ba8d8bfd90ff3423e2 [file] [log] [blame]
/*
/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);
}