User::grent(3pm) Perl Programmers Reference Guide User::grent(3pm)
NAME
User::grent - by-name interface to Perl's built-in getgr*() functions
SYNOPSIS
use User::grent;
my $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";
}
my $gr = getgr($whoever);
DESCRIPTION
This module's default exports override the core getgrent(), getgrgid(),
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 getgr() function is a simple front-end that forwards a numeric
argument to getgrgid() and the rest to getgrnam().
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 v5.38.2 2023-11-28 User::grent(3pm)
perl 5.38.2 - Generated Sun Dec 15 10:04:12 CST 2024