A very basic Unix shell implementation which does not spawn any processes but instead implements shell pipelines with cooperative multitasking
Only a few commands are implemented. There are no background processes, stdio redirection apart from the pipe, environment variables or the like. Spawning external programs is also not supported.
Compile the app and run babyshell. Then type commands such as:
cd subdir
ls
cd ..
cat build.ninja | sort | uniq
ls | grep build
None of the commands takes file arguments so you need to use cat.
To end the shell type exit to quit or just hit ctrl-c.