


User::grent(3p)  Perl Programmers Reference Guide User::grent(3p)


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
       similarly named structure field name from the C's passwd
       structure from grp.h; namely name, passwd, gid, and
       members (not mem).  The first three return scalars, the
       last an array reference.

       You may also import all the structure fields directly into
       your namespace as regular variables using the :FIELDS
       import tag.  (Note that this still overrides your core
       functions.)  Access these fields as variables named with a
       preceding "gr_".  Thus, "$group_obj->gid()" corresponds to
       $gr_gid if you import the fields.  Array references are
       available as regular array variables, so "@{
       $group_obj->members() }" would be simply @gr_members.

       The getpw() function is a simple front-end that forwards a
       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 access
       function functions with their full qualified names.  On
       the other hand, the built-ins are still available via the
       "CORE::" pseudo-package.

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

AUTHOR
       Tom Christiansen



perl v5.10.1                2006-03-28                          1


