My solution shell for the popular ostep projects., specifically the process-shell "https://github.com/remzi-arpacidusseau/ostep-projects/tree/master/processes-shell"
Also with added commands and functionality: cat, history, and pipes
Clone repo from link above and build with given wish.c file. Build and run with cloned test cases.
gcc -o wish wish.c -Wall -Werror
./test-wish.sh