User::grent(3) Perl Programmers Reference Guide User::grent(3)NAMEUser::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 get_
grent(), 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 refer
ence.
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 func
tion 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
2001-02-22 perl v5.6.1 User::grent(3)
