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can_read ( [ TIMEOUT ] ) Return an array of handles that are ready for reading. ... returning an empty list, in seconds, possibly frac- tional. If "TIMEOUT" is not given and any handles are registered then the call will block.
#!/usr/bin/perl use warnings; ... Sun May 22 15:44:48 2005 - Child: there are 1 handles ready for readin +g Sun May 22 15:44:48 2005 - Child: exiting Sun May 22 15:44:48 2005 - Parent: exiting