fcntl(3pm) [redhat man page]

Fcntl(3pm)						 Perl Programmers Reference Guide						Fcntl(3pm)

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 Exporter.

       You can request that the old constants (FAPPEND, FASYNC, FCREAT, FDEFER, FEXCL, FNDELAY, FNONBLOCK, FSYNC, FTRUNC) be provided for compati-
       bility 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).

       For ease of use also the SEEK_* constants (for seek() and sysseek(), e.g. SEEK_END) and the S_I* constants (for chmod() and stat()) are
       available for import.  They can be imported either separately or using the tags ":seek" and ":mode".

       Please refer to your native fcntl(2), open(2), fseek(3), lseek(2) (equal to Perl's seek() and sysseek(), respectively), and chmod(2) docu-
       mentation to see what constants are implemented in your system.

       See perlopentut to learn about the uses of the O_* constants with sysopen().

       See "seek" in perlfunc and "sysseek" in perlfunc about the SEEK_* constants.

       See "stat" in perlfunc about the S_I* constants.

perl v5.8.0							    2002-06-01								Fcntl(3pm)

PMEXP(1p)						User Contributed Perl Documentation						 PMEXP(1p)

NAME

       pmexp - show a module's exports

DESCRIPTION

       Given a module name, this program identifies which symbols are automatically exported (in that package's @EXPORT), those which are
       optionally exported (in that package's @EXPORT_OK), and also lists out the import groups (in that package's %EXPORT_TAGS hash).

EXAMPLES

	   $ pmexp Text::ParseWords
	   Text::ParseWords automatically exports shellwords, quotewords, nested_quotewords, and parse_line
	   Text::ParseWords optionally exports old_shellwords

	   $ pmexp Text::Wrap
	   Text::Wrap automatically exports wrap and fill
	   Text::Wrap optionally exports $columns, $break, and $huge

	   $ pmexp Fcntl
	   Fcntl automatically exports FD_CLOEXEC, F_DUPFD, F_EXLCK, F_GETFD, F_GETFL, F_GETLK, F_GETLK64, F_GETOWN, F_POSIX, F_RDLCK, F_SETFD, F_SETFL, F_SETLK, F_SETLK64, F_SETLKW, F_SETLKW64, F_SETOWN, F_SHLCK, F_UNLCK, F_WRLCK, O_ACCMODE, O_APPEND, O_ASYNC, O_BINARY, O_CREAT, O_DEFER, O_DSYNC, O_EXCL, O_EXLOCK, O_LARGEFILE, O_NDELAY, O_NOCTTY, O_NONBLOCK, O_RDONLY, O_RDWR, O_RSYNC, O_SHLOCK, O_SYNC, O_TEXT, O_TRUNC, and O_WRONLY

	   Fcntl optionally exports FAPPEND, FASYNC, FCREAT, FDEFER, FEXCL, FNDELAY, FNONBLOCK, FSYNC, FTRUNC, LOCK_EX, LOCK_NB, LOCK_SH, and LOCK_UN
	   Fcntl export tag `Fcompat' includes FAPPEND, FASYNC, FCREAT, FDEFER, FEXCL, FNDELAY, FNONBLOCK, FSYNC, and FTRUNC
	   Fcntl export tag `flock' includes LOCK_SH, LOCK_EX, LOCK_NB, and LOCK_UN

BUGS

       The output formatting should be nicer, perhaps using "format" and "write".

SEE ALSO

       pmeth(1), perlmod(1), Exporter(3).

AUTHORS and COPYRIGHTS
       Copyright (C) 1999 Tom Christiansen.

       Copyright (C) 2006-2008 Mark Leighton Fisher.

       This is free software; you can redistribute it and/or modify it under the terms of either: (a) the GNU General Public License as published
       by the Free Software Foundation; either version 1, or (at your option) any later version, or (b) the Perl "Artistic License".  (This is the
       Perl 5 licensing scheme.)

       Please note this is a change from the original pmtools-1.00 (still available on CPAN), as pmtools-1.00 were licensed only under the Perl
       "Artistic License".

perl v5.10.1							    2010-02-22								 PMEXP(1p)