File System

Minimalistic file system

CLI commands

• cd <fileName>

  • create a new file with the name <fileName>
  • Output: File <name> created

• de <name>

  • destroy the named file <fileName>
  • Output: File <fileName> deleted

• op <name>

  • open the named file <fileName> for reading and writing; display an OFT index value
  • Output: File <fileName> opened, index=<index>

• cl <index>

  • close the specified file <index>
  • Output: File <index> closed

• rd <index> <count>

  • sequentially read a number of bytes <count> from the specified file <index> and display them on the terminal
  • Output: <count> bytes read: <xx...x>

• wr <index> <char> <count>

  • sequentially write <count> number of <char>s into the specified file <index> at its current position
  • Output: <count> bytes written

• sk <index> <pos>

  • seek: set the current position of the specified file <index> to <pos>
  • Output: Current position is <pos>

• dr

  • directory: list the names of all files and their lengths
  • Output: file0 <len0>,..., fileN <lenN>

• in <diskName>

  • create a disk and initialize it using the file <diskName> (copy of disk)
  • If file does not exist, create and open directory; output: Disk initialized
  • If file does exist, open directory; output: Disk restored

• sv <disk_cont>

  • close all files and save the contents of the disk in the file <disk_cont>
  • Output: <File <index1> closed>, .., <File <indexN> closed>, Disk saved

• drop <diskName>

  • delete saved disk image with name <diskName> if such exists
  • Output: <diskName> deleted

• end

  • ends CLI session

• If any command fails, output: help message with commands list