1 files changed, 98 insertions, 0 deletions
diff --git a/ext2ed/ext2_com.c b/ext2ed/ext2_com.c
new file mode 100644
index 0000000..ed004f2
--- /dev/null
+++ b/ext2ed/ext2_com.c
@@ -0,0 +1,98 @@
+/*
+
+/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 "config.h"
+#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);
+}