SC2278

#!/bin/ksh
$0=myname
echo "Usage: $0 --help"

#!/bin/ksh
myname() {
  echo "Usage: $0 --help"
}
myname

You appear to be trying to assign a new value to $0 in Ksh.

This is not possible. However, $0 will reflect the current function name, so if you wrap your code in a function with your chosen name, you can have $0 expand to it.

If you instead wanted to compare the value of $0, use a comparison like [ "$0" = "myname" ].

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