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  1. or download this
    #!/bin/sh
#
...
echo "Returned $?"

exit 0
  2. or download this
    #!/usr/bin/perl
#
...
    print "MY_VAR is not set\n";
    exit 1;
}
  3. or download this
    #!/usr/bin/perl
#
...
else {
    printf "child exited with value %d\n", $return >> 8;
}
  4. or download this
    #!/usr/bin/perl
#
...
else {
    printf "Child '%s' exited with value %d\n", $binary, $? >> 8;
}