Add pwd and related commands

tiqwab / xv6-rust

xv6 implementation in rust

MIT License

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Add pwd and related commands #19

Closed tiqwab closed 4 years ago

tiqwab commented 4 years ago

Add commands:

pwd
mkdir
cd

Note that the current shell does not have something like PATH environment variable, so we have to specify the absolute path of command to execute it in a directory other than /.