User::grent - by-name interface to Perl's built-in getgr*() functions
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);
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() funtion 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.
While this class is currently implemented using the Class::Struct module to build a struct-like class, you shouldn't rely upon this.
Tom Christiansen
If rather than formatting bugs, you encounter substantive content errors in these documents, such as mistakes in the explanations or code, please use the perlbug utility included with the Perl distribution.