Check in ext2ed version 0.1

1 files changed, 214 insertions, 0 deletions

diff --git a/ext2ed/inodebitmap_com.c b/ext2ed/inodebitmap_com.c
new file mode 100644
index 00000000..f1fddd45
--- /dev/null
+++ b/ext2ed/inodebitmap_com.c
@@ -0,0 +1,214 @@
+/*
+
+/usr/src/ext2ed/inodebitmap_com.c
+
+A part of the extended file system 2 disk editor.
+
+-------------------------
+Handles the inode bitmap.
+-------------------------
+
+Please refer to the documentation in blockbitmap_com.c - Those two files are almost equal.
+
+First written on: July 25 1995
+
+Copyright (C) 1995 Gadi Oxman
+
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "ext2ed.h"
+
+
+void type_ext2_inode_bitmap___entry (char *command_line)
+
+{
+	unsigned long entry_num;
+	char *ptr,buffer [80];
+	
+	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);
+
+	entry_num=atol (buffer);
+	
+	if (entry_num >= file_system_info.super_block.s_inodes_per_group) {
+		wprintw (command_win,"Error - Entry number out of bounds\n");refresh_command_win ();return;
+	}
+	
+	inode_bitmap_info.entry_num=entry_num;
+	strcpy (buffer,"show");dispatch (buffer);
+}
+
+void type_ext2_inode_bitmap___next (char *command_line)
+
+{
+	long entry_offset=1;
+	char *ptr,buffer [80];
+	
+	ptr=parse_word (command_line,buffer);
+	if (*ptr!=0) {
+		ptr=parse_word (ptr,buffer);
+		entry_offset=atol (buffer);
+	}
+
+	sprintf (buffer,"entry %ld",inode_bitmap_info.entry_num+entry_offset);
+	dispatch (buffer);
+}
+
+void type_ext2_inode_bitmap___prev (char *command_line)
+
+{
+	long entry_offset=1;
+	char *ptr,buffer [80];
+	
+	ptr=parse_word (command_line,buffer);
+	if (*ptr!=0) {
+		ptr=parse_word (ptr,buffer);
+		entry_offset=atol (buffer);
+	}
+
+	sprintf (buffer,"entry %ld",inode_bitmap_info.entry_num-entry_offset);
+	dispatch (buffer);
+}
+
+void type_ext2_inode_bitmap___allocate (char *command_line)
+
+{
+	long entry_num,num=1;
+	char *ptr,buffer [80];
+	
+	ptr=parse_word (command_line,buffer);
+	if (*ptr!=0) {
+		ptr=parse_word (ptr,buffer);
+		num=atol (buffer);
+	}
+	
+	entry_num=inode_bitmap_info.entry_num;
+	if (num > file_system_info.super_block.s_inodes_per_group-entry_num) {
+		wprintw (command_win,"Error - There aren't that much inodes in the group\n");	
+		refresh_command_win ();return;				
+	}
+	
+	while (num) {
+		allocate_inode (entry_num);
+		num--;entry_num++;
+	}
+	
+	dispatch ("show");
+}
+
+void type_ext2_inode_bitmap___deallocate (char *command_line)
+
+{
+	long entry_num,num=1;
+	char *ptr,buffer [80];
+	
+	ptr=parse_word (command_line,buffer);
+	if (*ptr!=0) {
+		ptr=parse_word (ptr,buffer);
+		num=atol (buffer);
+	}
+	
+	entry_num=inode_bitmap_info.entry_num;
+	if (num > file_system_info.super_block.s_inodes_per_group-entry_num) {
+		wprintw (command_win,"Error - There aren't that much inodes in the group\n");	
+		refresh_command_win ();return;				
+	}
+	
+	while (num) {
+		deallocate_inode (entry_num);
+		num--;entry_num++;
+	}
+	
+	dispatch ("show");
+}
+
+
+void allocate_inode (long entry_num)
+
+{
+	unsigned char bit_mask=1;
+	int byte_offset,j;
+	
+	byte_offset=entry_num/8;
+	for (j=0;j<entry_num%8;j++)
+		bit_mask*=2;
+	type_data.u.buffer [byte_offset] |= bit_mask;
+}
+
+void deallocate_inode (long entry_num)
+
+{
+	unsigned char bit_mask=1;
+	int byte_offset,j;
+	
+	byte_offset=entry_num/8;
+	for (j=0;j<entry_num%8;j++)
+		bit_mask*=2;
+	bit_mask^=0xff;
+	
+	type_data.u.buffer [byte_offset] &= bit_mask;
+}
+
+void type_ext2_inode_bitmap___show (char *command_line)
+
+{
+	int i,j;
+	unsigned char *ptr;
+	unsigned long inode_num,entry_num;
+
+	ptr=type_data.u.buffer;
+	show_pad_info.line=0;show_pad_info.max_line=-1;
+	
+	wmove (show_pad,0,0);
+	for (i=0,entry_num=0;i<file_system_info.super_block.s_inodes_per_group/8;i++,ptr++) {
+		for (j=1;j<=128;j*=2) {
+			if (entry_num==inode_bitmap_info.entry_num) {
+				wattrset (show_pad,A_REVERSE);
+				show_pad_info.line=show_pad_info.max_line-show_pad_info.display_lines/2;
+			}
+
+			if ((*ptr) & j)
+				wprintw (show_pad,"1");
+			else
+				wprintw (show_pad,"0");
+
+			if (entry_num==inode_bitmap_info.entry_num)
+				wattrset (show_pad,A_NORMAL);
+
+			entry_num++;
+		}
+		wprintw (show_pad," ");
+		if (i%8==7) {
+			wprintw (show_pad,"\n");
+			show_pad_info.max_line++;
+		}
+	}
+	
+	if (i%8!=7) {
+		wprintw (show_pad,"\n");
+		show_pad_info.max_line++;
+	}
+
+	refresh_show_pad ();	
+	show_info ();
+	wmove (show_win,1,0);wprintw (show_win,"Inode bitmap of block group %ld\n",inode_bitmap_info.group_num);
+
+	inode_num=1+inode_bitmap_info.entry_num+inode_bitmap_info.group_num*file_system_info.super_block.s_inodes_per_group;
+	wprintw (show_win,"Status of inode %ld - ",inode_num);
+	ptr=type_data.u.buffer+inode_bitmap_info.entry_num/8;
+	j=1;
+	for (i=inode_bitmap_info.entry_num % 8;i>0;i--)
+		j*=2;
+	if ((*ptr) & j)
+		wprintw (show_win,"Allocated\n");
+	else
+		wprintw (show_win,"Free\n");
+	refresh_show_win ();
+}