summaryrefslogtreecommitdiffstats
path: root/ext2ed/inodebitmap_com.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--ext2ed/inodebitmap_com.c215
1 files changed, 215 insertions, 0 deletions
diff --git a/ext2ed/inodebitmap_com.c b/ext2ed/inodebitmap_com.c
new file mode 100644
index 0000000..157807a
--- /dev/null
+++ b/ext2ed/inodebitmap_com.c
@@ -0,0 +1,215 @@
+/*
+
+/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 "config.h"
+#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 ();
+}