User::grent(3p) Perl Programmers Reference Guide User::grent(3p) #
User::grent(3p) Perl Programmers Reference Guide User::grent(3p)
NNAAMMEE #
User::grent - by-name interface to Perl's built-in getgr*() functions
SSYYNNOOPPSSIISS #
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);
DDEESSCCRRIIPPTTIIOONN #
This module's default exports override the core ggeettggrreenntt(()), ggeettggrrggiidd(()),
and ggeettggrrnnaamm(()) 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 _g_r_p_._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 ggeettggrr(()) function is a simple front-end that forwards a numeric
argument to ggeettggrrggiidd(()) and the rest to ggeettggrrnnaamm(()).
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.
NNOOTTEE #
While this class is currently implemented using the Class::Struct module
to build a struct-like class, you shouldn't rely upon this.
AAUUTTHHOORR #
Tom Christiansen
perl v5.36.3 2019-12-30 User::grent(3p)