Question: Write a simple shell program using fork / exec / wait . Your program will repeatedly: 1 . Prompt the user for a command (

Write a simple shell program using fork/exec/wait. Your program will repeatedly:
1. Prompt the user for a command (assume there are no arguments), if the command is exit, quit
spawn a child
wait
Each child will
1. try to call some form of exec to run the command
2. if exec fails, the child prints "command failed" and ends

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