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/*
/usr/src/ext2ed/ext2_com.c
A part of the extended file system 2 disk editor.
--------------------------------------
Extended-2 filesystem General commands
--------------------------------------
The commands here will be registered when we are editing an ext2 filesystem
First written on: July 28 1995
Copyright (C) 1995 Gadi Oxman
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "ext2ed.h"
void type_ext2___super (char *command_line)
/*
We are moving to the superblock - Just use setoffset and settype. The offset was gathered in the
initialization phase (but is constant - 1024).
*/
{
char buffer [80];
super_info.copy_num=0;
sprintf (buffer,"setoffset %ld",file_system_info.super_block_offset);dispatch (buffer);
sprintf (buffer,"settype ext2_super_block");dispatch (buffer);
}
void type_ext2___cd (char *command_line)
/*
A global cd command - The path should start with /.
We implement it through dispatching to our primitive functions.
*/
{
char temp [80],buffer [80],*ptr;
ptr=parse_word (command_line,buffer);
if (*ptr==0) {
wprintw (command_win,"Error - No argument specified\n");refresh_command_win ();return;
}
ptr=parse_word (ptr,buffer);
if (buffer [0] != '/') {
wprintw (command_win,"Error - Use a full pathname (begin with '/')\n");refresh_command_win ();return;
}
/* Note the various dispatches below - They should be intuitive if you know the ext2 filesystem structure */
dispatch ("super");dispatch ("group");dispatch ("inode");dispatch ("next");dispatch ("dir");
if (buffer [1] != 0) {
sprintf (temp,"cd %s",buffer+1);dispatch (temp);
}
}
void type_ext2___group (char *command_line)
/*
We go to the group descriptors.
First, we go to the first group descriptor in the main copy.
Then, we use the group's entry command to pass to another group.
*/
{
long group_num=0;
char *ptr,buffer [80];
ptr=parse_word (command_line,buffer);
if (*ptr!=0) {
ptr=parse_word (ptr,buffer);
group_num=atol (buffer);
}
group_info.copy_num=0;group_info.group_num=0;
sprintf (buffer,"setoffset %ld",file_system_info.first_group_desc_offset);dispatch (buffer);
sprintf (buffer,"settype ext2_group_desc");dispatch (buffer);
sprintf (buffer,"entry %ld",group_num);dispatch (buffer);
}
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