notes.txt

Pack:
1. tar cvf tarfile [files]
	jtar c [files] > tarfile

Extract:
2. tar xpfv tarfile
	jtar x < tarfile
	

1.	parse command line arguments
2. x is extract c is create
3. 2 functions actracttar() and createTar()
4. processFiles(file, dllist) processes command line argument which checks fo errors
5. struct stat buf; DIR *dir
6.		call lstat(file, &buf)
7.		S_ISDIR(buf.st_mode) checks if file is a directory
			if exists
				create a list of all subdirs and files
			close dir
			traverse the list and recursively call processFiles() on everything
		
		S_ISREG(buf.st_mode) check if reg file
			
8.	traverse files in dllist 
		fileName = real_path(str, NULL)
		5 jrbs 
		if dir store in jrb dirs and jrb realPath

		else 
			inode_number = bu.st_ino
			if !in inode tree
				stor path in jrb real_path, jrb files, and jrb inode
			else in inode tree
				store in jrb hardLink, and jrb realPath

9. WRiting
	write the dirs
		write size, name, struct stat buf info
	write files
		for each file, write the contents of each files
		write size, name, struct stat buf info
	write hardLinks
		write size, name, struct stat buf info

10. EXTRACTING
	go in reverse order
	create the 5 jrb's: tmp, dirs, files, inode, hardLinks
	while(read size)
		read fileName
		read stat
		if file write contents

		if dir
			mkdir() put in jrb dirs
		else if not in inode <- is a file
			recreate dfile/ contents and put into jrb files
		else put file into hardLinks

//	traverse jrbs
//		use chmod(), utime(), and link()

11.recreate time, permissions
		time_buf
		files
			tim_buf.ooltime = buf->st_time
			tim_buf.modtime = buf->st_mtime
			utime(file, 
			chmod(file, buf->st_mode)

		links
		link()
		repeat process above for each

		dirs