Files

Files:

• abstraction of storage device (possibly real)
• can read/write
• starts at root dir “/“
• absolute (/Users/user/Documents) and relative (../Documents) paths

File permissions:

• throuh bit permission tuples (read-write-execute)
• x for directories is something like ‘cd’

Special files:

• everything is a file (descriptor)
• hardware: block (disks), character (serial port)
• symlinks to link to other files
• named/anonymous FIFOS (sockets/pipes)

Pipes:

• pseudofiles for processes to communicate over FIFO channel
• has to be set up in advance
• looks like a “normal” file