Fcntl - load the
C Fcntl.h defines
use Fcntl;
use Fcntl qw(:DEFAULT :flock);
This module is just a translation of the
C fnctl.h file. Unlike the old mechanism of requiring a translated fnctl.ph
file, this uses the h2xs program (see the Perl source distribution) and your native
C compiler. This means that it has a far more likely
chance of getting the numbers right.
Only #define symbols get translated; you must still correctly pack up your own arguments
to pass as args for locking functions, etc.
By default your system's
F_* and
O_* constants (eg,
F_DUPFD and
O_CREAT) are exported into your namespace. You can request that the flock constants
(LOCK_SH,
LOCK_EX,
LOCK_NB and
LOCK_UN) be provided by using the tag
:flock. See the Exporter manpage.
Please refer to your native fcntl and open
documentation to see what constants are implemented in your system.