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8407b1f)
Assume no input is an unpiped invocation a user tries to abort by ctrl-C.
$SIG{INT} = sub {
$SIG{INT} = 'DEFAULT'; # reset for subsequent attempts
$SIG{INT} = sub {
$SIG{INT} = 'DEFAULT'; # reset for subsequent attempts
'IGNORE' # continue after assumed eof
};
'IGNORE' # continue after assumed eof
};