Fcntl
Section: Perl Programmers Reference Guide
(3)
Updated: perl 5.004, patch 55
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NAME
Fcntl - load the C Fcntl.h defines
SYNOPSIS
use Fcntl;
use Fcntl qw(:DEFAULT :flock);
DESCRIPTION
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.
NOTE
Only #define symbols get translated; you must still correctly
pack up your own arguments to pass as args for locking functions, etc.
EXPORTED SYMBOLS
By default your system's F_* and O_* constants (eg, F_DUPFD and
O_CREAT) and the FD_CLOEXEC constant 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.
You can request that the old constants (FAPPEND, FASYNC, FCREAT,
FDEFER, FEXCL, FNDELAY, FNONBLOCK, FSYNC, FTRUNC) be provided for
compatibility reasons by using the tag :Fcompat. For new
applications the newer versions of these constants are suggested
(O_APPEND, O_ASYNC, O_CREAT, O_DEFER, O_EXCL, O_NDELAY, O_NONBLOCK,
O_SYNC, O_TRUNC).
Please refer to your native fcntl() and open() documentation to see
what constants are implemented in your system.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- NOTE
-
- EXPORTED SYMBOLS
-
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Time: 23:58:15 GMT, February 15, 2023