AWK terminal, consol or shell

This is a small awk program, which makes you able to execute commands in a simple shell:

BEGIN {

ARGC = 2; ARGV[1] = "-"

do {

printf("prompt>")

while ((input = getline) > 0)

if ($0 ~ "exit") {

print "Exit!"

input = 0;

break

} else if ($0 ~ "help") {

print "commands: help, cmd1, cmd2, exit"

break

} else if ($0 ~ "cmd1") {

print "executing custom command 1"

break

} else if ($0 ~ "cmd2") {

print "executing custom command 2"

break

}else {

print "not understood"

break

}

} while (input > 0)

}

This is a sample run:

prompt>help

commands: help, cmd1, cmd2, exit

prompt>cmd1

executing custom command 1

prompt>blabla

not understood

prompt>exit

Exit!

It's nothing special, but it's a good start, if you want to use awk not from command line, but from within a more user-friendly shell.