Theodore Ts'o | 583a1ce | 2002-05-11 13:00:22 -0400 | [diff] [blame] | 1 | /* |
| 2 | |
| 3 | /usr/src/ext2ed/ext2_com.c |
| 4 | |
| 5 | A part of the extended file system 2 disk editor. |
| 6 | |
| 7 | -------------------------------------- |
| 8 | Extended-2 filesystem General commands |
| 9 | -------------------------------------- |
| 10 | |
| 11 | The commands here will be registered when we are editing an ext2 filesystem |
| 12 | |
| 13 | First written on: July 28 1995 |
| 14 | |
| 15 | Copyright (C) 1995 Gadi Oxman |
| 16 | |
| 17 | */ |
| 18 | |
| 19 | #include <stdio.h> |
| 20 | #include <stdlib.h> |
| 21 | #include <string.h> |
| 22 | |
| 23 | #include "ext2ed.h" |
| 24 | |
| 25 | void type_ext2___super (char *command_line) |
| 26 | |
| 27 | /* |
| 28 | |
| 29 | We are moving to the superblock - Just use setoffset and settype. The offset was gathered in the |
| 30 | initialization phase (but is constant - 1024). |
| 31 | |
| 32 | */ |
| 33 | |
| 34 | { |
| 35 | char buffer [80]; |
| 36 | |
| 37 | super_info.copy_num=0; |
| 38 | sprintf (buffer,"setoffset %ld",file_system_info.super_block_offset);dispatch (buffer); |
| 39 | sprintf (buffer,"settype ext2_super_block");dispatch (buffer); |
| 40 | } |
| 41 | |
| 42 | void type_ext2___cd (char *command_line) |
| 43 | |
| 44 | /* |
| 45 | |
| 46 | A global cd command - The path should start with /. |
| 47 | |
| 48 | We implement it through dispatching to our primitive functions. |
| 49 | |
| 50 | */ |
| 51 | |
| 52 | { |
| 53 | char temp [80],buffer [80],*ptr; |
| 54 | |
| 55 | ptr=parse_word (command_line,buffer); |
| 56 | if (*ptr==0) { |
| 57 | wprintw (command_win,"Error - No argument specified\n");refresh_command_win ();return; |
| 58 | } |
| 59 | ptr=parse_word (ptr,buffer); |
| 60 | |
| 61 | if (buffer [0] != '/') { |
| 62 | wprintw (command_win,"Error - Use a full pathname (begin with '/')\n");refresh_command_win ();return; |
| 63 | } |
| 64 | |
| 65 | /* Note the various dispatches below - They should be intuitive if you know the ext2 filesystem structure */ |
| 66 | |
| 67 | dispatch ("super");dispatch ("group");dispatch ("inode");dispatch ("next");dispatch ("dir"); |
| 68 | if (buffer [1] != 0) { |
| 69 | sprintf (temp,"cd %s",buffer+1);dispatch (temp); |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | void type_ext2___group (char *command_line) |
| 74 | |
| 75 | /* |
| 76 | |
| 77 | We go to the group descriptors. |
| 78 | First, we go to the first group descriptor in the main copy. |
| 79 | Then, we use the group's entry command to pass to another group. |
| 80 | |
| 81 | */ |
| 82 | |
| 83 | { |
| 84 | long group_num=0; |
| 85 | char *ptr,buffer [80]; |
| 86 | |
| 87 | ptr=parse_word (command_line,buffer); |
| 88 | if (*ptr!=0) { |
| 89 | ptr=parse_word (ptr,buffer); |
| 90 | group_num=atol (buffer); |
| 91 | } |
| 92 | |
| 93 | group_info.copy_num=0;group_info.group_num=0; |
| 94 | sprintf (buffer,"setoffset %ld",file_system_info.first_group_desc_offset);dispatch (buffer); |
| 95 | sprintf (buffer,"settype ext2_group_desc");dispatch (buffer); |
| 96 | sprintf (buffer,"entry %ld",group_num);dispatch (buffer); |
| 97 | } |