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