NAME

POSIX::1003::FS - POSIX for the file-system

INHERITANCE

 POSIX::1003::FS
   is a POSIX::1003

SYNOPSIS

  use POSIX::1003::FS qw(access R_OK);
  if(access($fn, R_OK)) # $fn is readible?

  use POSIX::1003::FS qw(mkfifo);
  use Fcntl ':mode';
  mkfifo($path, S_IRUSR|S_IWUSR) or die $!;

  # Absorbed from Unix::Mknod
  use POSIX::1003::FS qw(mknod major minor makedev);
  use File::stat
  my $st    = stat '/dev/null';
  my $major = major $st->rdev;
  my $minor = minor $st->rdev;
  mknod '/tmp/special', S_IFCHR|0600, makedev($major,$minor+1);

DESCRIPTION

You may also need POSIX::1003::Pathconf.

Exporter

FUNCTIONS

Standard POSIX

access(FILENAME, FLAGS)

Read man filetest before you start using this function! Use the *_OK constants for FLAGS.

lchown(UID, GID, FILENAMES)

Like chown(), but does not follow symlinks when encountered. Returns the number of files successfully changed.

Warning, POSIX uses different parameter order:

  # POSIX specification:
  # int lchown(const char *path, uid_t owner, gid_t group);

  # Perl core implementation:
  my $successes = chown($uid, $gid, @filenames);

  use POSIX;
  POSIX::lchown($uid, $gid, $filename) or die $!;

  use POSIX::1003::FS 'lchown';
  my @successes = lchown($uid, $gid, @filenames);

mkdir([FILENAME [MASK]])

Simple CORE::mkdir()

mkfifo(FILENAME, MODE)

mknod(PATH, MODE, DEVICE)

Create a special device node on PATH. Useful symbols for MODE can be collected from Fcntl (import tag :mode). The DEVICE number is a combination from the type (major number), a sequence number and usage information (combined in a minor number).

utime(ATIME, MTIME, FILENAMES)

Simply CORE::utime()

Warning, POSIX.pm uses a different parameter order than core.

  POSIX::utime($filename, $atime, $mtime);
  CORE::utime($atime, $mtime, @filenames);

Additional

major(DEVICE)

makedev(MAJOR, MINOR)

Combine MAJOR and MINOR into a single DEVICE number.

 my $device      = (stat $filename)[6];
 my $device_type = major $device;
 my $sequence_nr = minor $device;

 my $device = makedev $major, $minor;
 mknod $specialfile, $mode, $device;

minor(DEVICE)

CONSTANTS

The following constants are exported, shown here with the values discovered during installation of this module:

The constant names for this math module are inserted here during installation.

SEE ALSO

This module is part of POSIX-1003 distribution version 0.09, built on January 04, 2012. Website: http://perl.overmeer.net. The code is based on POSIX, which is released with Perl itself.

COPYRIGHTS

Copyrights of the perl code and the related documentation by 2011-2012 by Mark Overmeer. For other contributors see ChangeLog.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See http://www.perl.com/perl/misc/Artistic.html