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Fcntl - Import constants for flock/seek/sysopen function

You can use the Fcntl function to import constants used in the flock and seek functions.

# constant of flock function
use Fcntl ':flock';

# seek function constant
use Fcntl ':seek';

# sysopen function constant
use Fcntl ':DEFAULT';

Constants used in the flock function

This is the constant used in the imported flock function.

Constants used in the seek function

A constant used in the imported seek function.

Constants used in sysopen function

This is a constant related to the file mode used by the imported sysopen function.