I'd guess that there's no use POSIX; in the snippet. POSIX.pm is where the O_WRONLY, O_TRUNC and O_CREAT constants are defined.

A poor guess. The code shown in the original post clearly has use Fcntl, which by default will export all system F_* and O_* constants.

In reply to Re: Re: open vs. sysopen by Anonymous Monk
in thread open vs. sysopen by sheep

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