CSE 131 Lecture Notes - Lecture 21: File System, Vacuum, Directory Structure
Document Summary
Owned by 3 different people: a, b and c (owners shown in red) Solves naming problem: each user has her own directory. Multiple users can use the same file name. By default, users access files in their own directories. Extension: allow users to access files in others" directories. Block system where a block points to another block system that contains contents for that directory/file. Delete: remove a directory (usually must be empty) Opendir: open a directory to allow searching it. Rename: change the name of a directory. Unline: remove an entry in a directory. Link: create a new entry in a directory to link to an existing file. Partition table: tells you the partitions on the disk. Index nodes: allows you to navigate through files and directories. Free space management: information that enables you to find a block and empty it. Contiguous allocation requires all blocks of a file to be consecutive on disk.
