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User::grent

Section: Perl Programmers Reference Guide (3)
Updated: perl 5.004, patch 04
Index

NAME

User::grent - by-name interface to Perl's built-in getgr*() functions

SYNOPSIS

 use User::grent; $gr = getgrgid(0) or die "No group zero"; if ( $gr->name eq 'wheel' && @{$gr->members} > 1 ) {     print "gid zero name wheel, with other members"; }

 use User::grent qw(:FIELDS; getgrgid(0) or die "No group zero"; if ( $gr_name eq 'wheel' && @gr_members > 1 ) {     print "gid zero name wheel, with other members"; }

 $gr = getgr($whoever);

DESCRIPTION

This module's default exports override the core getgrent(), getgruid(),and getgrnam() functions, replacing them with versions that return``User::grent'' objects. This object has methods that return the similarlynamed structure field name from the C's passwd structure from grp.h; namely name, passwd, gid, and members (not mem). The first threereturn scalars, the last an array reference.

You may also import all the structure fields directly into your namespaceas regular variables using the :FIELDS import tag. (Note that this stilloverrides your core functions.) Access these fields as variables namedwith a preceding gr_. Thus, $group_obj->gid() correspondsto $gr_gid if you import the fields. Array references are available asregular array variables, so @{ $group_obj->members() } would besimply @gr_members.

The getpw() funtion is a simple front-end that forwardsa numeric argument to getpwuid() and the rest to getpwnam().

To access this functionality without the core overrides,pass the use an empty import list, and then accessfunction functions with their full qualified names.On the other hand, the built-ins are still availablevia the CORE:: pseudo-package.

NOTE

While this class is currently implemented using the Class::Structmodule to build a struct-like class, you shouldn't rely upon this.

AUTHOR

Tom Christiansen

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