program stops after execvp( command.argv[0], command.argv)

Question

I am writing a small shell program that takes a command and executes it. If the user enters a not valid command the if statement returns a -1. If the command is correct it exe

Answer 1

From the documentation on exec

The exec() family of functions replaces the current process image with a new process image. The functions described in this manual page are front-ends for execve(2). (See the manual page for > execve(2) for further details about the replacement of the current process image.)

If you want your process to continue, this is not the function you want to use.