/ 
Win32-FileSecurity-1.07
River stage zero No dependents
/ Win32::FileSecurity

NAME

Win32::FileSecurity - Manage FileSecurity Discretionary Access Control Lists in Perl

SYNOPSIS

use Win32::FileSecurity;

DESCRIPTION

This module offers control over the administration of system FileSecurity DACLs. You may want to use Get and EnumerateRights to get an idea of what mask values correspond to what rights as viewed from File Manager.

CONSTANTS

DELETE, READ_CONTROL, WRITE_DAC, WRITE_OWNER,
SYNCHRONIZE, STANDARD_RIGHTS_REQUIRED,
STANDARD_RIGHTS_READ, STANDARD_RIGHTS_WRITE,
STANDARD_RIGHTS_EXECUTE, STANDARD_RIGHTS_ALL,
SPECIFIC_RIGHTS_ALL, ACCESS_SYSTEM_SECURITY,
MAXIMUM_ALLOWED, GENERIC_READ, GENERIC_WRITE,
GENERIC_EXECUTE, GENERIC_ALL, F, FULL, R, READ,
C, CHANGE

FUNCTIONS

NOTE:

All of the functions return false if they fail, unless otherwise noted. Errors returned via $! containing both Win32 GetLastError() and a text message indicating Win32 function that failed.

constant( $name, $set )

Stores the value of named constant $name into $set. Same as $set = Win32::FileSecurity::NAME_OF_CONSTANT();.

Get( $filename, \%permisshash )

Gets the DACLs of a file or directory.

Set( $filename, \%permisshash )

Sets the DACL for a file or directory.

EnumerateRights( $mask, \@rightslist )

Turns the bitmask in $mask into a list of strings in @rightslist.

MakeMask( qw( DELETE READ_CONTROL ) )

Takes a list of strings representing constants and returns a bitmasked integer value.

%permisshash

Entries take the form $permisshash{USERNAME} = $mask ;

EXAMPLE1

# Gets the rights for all files listed on the command line.
use Win32::FileSecurity qw(Get EnumerateRights);

foreach( @ARGV ) {
    next unless -e $_ ;
    if ( Get( $_, \%hash ) ) {
        while( ($name, $mask) = each %hash ) {
            print "$name:\n\t";
            EnumerateRights( $mask, \@happy ) ;
            print join( "\n\t", @happy ), "\n";
        }
    }
    else {
        print( "Error #", int( $! ), ": $!" ) ;
    }
}

EXAMPLE2

# Gets existing DACL and modifies Administrator rights
use Win32::FileSecurity qw(MakeMask Get Set);

# These masks show up as Full Control in File Manager
$file = MakeMask( qw( FULL ) );

$dir = MakeMask( qw(
    FULL
    GENERIC_ALL
) );

foreach( @ARGV ) {
    s/\\$//;
    next unless -e;
    Get( $_, \%hash ) ;
    $hash{Administrator} = ( -d ) ? $dir : $file ;
    Set( $_, \%hash ) ;
}

COMMON MASKS FROM CACLS AND WINFILE

READ

MakeMask( qw( FULL ) ); # for files
MakeMask( qw( READ GENERIC_READ GENERIC_EXECUTE ) ); # for directories

CHANGE

MakeMask( qw( CHANGE ) ); # for files
MakeMask( qw( CHANGE GENERIC_WRITE GENERIC_READ GENERIC_EXECUTE ) ); # for directories

ADD & READ

MakeMask( qw( ADD GENERIC_READ GENERIC_EXECUTE ) ); # for directories only!

FULL

MakeMask( qw( FULL ) ); # for files
MakeMask( qw( FULL  GENERIC_ALL ) ); # for directories

LIMITATIONS

The module currently only supports ALLOW ACLs; DENY ACLs are not being reported by Get() and cannot be Set() either.

KNOWN ISSUES / BUGS

  1. May not work on remote drives.

  2. Errors croak, don't return via $! as documented.

COPYRIGHT

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.