1 | package User::grent;
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2 | use strict;
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3 |
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4 | use 5.006_001;
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5 | our $VERSION = '1.01';
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6 | our(@EXPORT, @EXPORT_OK, %EXPORT_TAGS);
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7 | BEGIN {
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8 | use Exporter ();
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9 | @EXPORT = qw(getgrent getgrgid getgrnam getgr);
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10 | @EXPORT_OK = qw($gr_name $gr_gid $gr_passwd $gr_mem @gr_members);
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11 | %EXPORT_TAGS = ( FIELDS => [ @EXPORT_OK, @EXPORT ] );
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12 | }
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13 | use vars @EXPORT_OK;
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14 |
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15 | # Class::Struct forbids use of @ISA
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16 | sub import { goto &Exporter::import }
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17 |
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18 | use Class::Struct qw(struct);
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19 | struct 'User::grent' => [
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20 | name => '$',
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21 | passwd => '$',
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22 | gid => '$',
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23 | members => '@',
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24 | ];
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25 |
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26 | sub populate (@) {
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27 | return unless @_;
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28 | my $gob = new();
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29 | ($gr_name, $gr_passwd, $gr_gid) = @$gob[0,1,2] = @_[0,1,2];
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30 | @gr_members = @{$gob->[3]} = split ' ', $_[3];
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31 | return $gob;
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32 | }
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33 |
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34 | sub getgrent ( ) { populate(CORE::getgrent()) }
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35 | sub getgrnam ($) { populate(CORE::getgrnam(shift)) }
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36 | sub getgrgid ($) { populate(CORE::getgrgid(shift)) }
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37 | sub getgr ($) { ($_[0] =~ /^\d+/) ? &getgrgid : &getgrnam }
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38 |
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39 | 1;
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40 | __END__
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41 |
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42 | =head1 NAME
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43 |
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44 | User::grent - by-name interface to Perl's built-in getgr*() functions
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45 |
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46 | =head1 SYNOPSIS
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47 |
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48 | use User::grent;
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49 | $gr = getgrgid(0) or die "No group zero";
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50 | if ( $gr->name eq 'wheel' && @{$gr->members} > 1 ) {
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51 | print "gid zero name wheel, with other members";
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52 | }
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53 |
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54 | use User::grent qw(:FIELDS);
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55 | getgrgid(0) or die "No group zero";
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56 | if ( $gr_name eq 'wheel' && @gr_members > 1 ) {
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57 | print "gid zero name wheel, with other members";
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58 | }
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59 |
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60 | $gr = getgr($whoever);
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61 |
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62 | =head1 DESCRIPTION
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63 |
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64 | This module's default exports override the core getgrent(), getgruid(),
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65 | and getgrnam() functions, replacing them with versions that return
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66 | "User::grent" objects. This object has methods that return the similarly
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67 | named structure field name from the C's passwd structure from F<grp.h>;
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68 | namely name, passwd, gid, and members (not mem). The first three
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69 | return scalars, the last an array reference.
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70 |
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71 | You may also import all the structure fields directly into your namespace
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72 | as regular variables using the :FIELDS import tag. (Note that this still
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73 | overrides your core functions.) Access these fields as variables named
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74 | with a preceding C<gr_>. Thus, C<$group_obj-E<gt>gid()> corresponds
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75 | to $gr_gid if you import the fields. Array references are available as
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76 | regular array variables, so C<@{ $group_obj-E<gt>members() }> would be
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77 | simply @gr_members.
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78 |
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79 | The getpw() function is a simple front-end that forwards
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80 | a numeric argument to getpwuid() and the rest to getpwnam().
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81 |
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82 | To access this functionality without the core overrides,
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83 | pass the C<use> an empty import list, and then access
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84 | function functions with their full qualified names.
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85 | On the other hand, the built-ins are still available
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86 | via the C<CORE::> pseudo-package.
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87 |
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88 | =head1 NOTE
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89 |
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90 | While this class is currently implemented using the Class::Struct
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91 | module to build a struct-like class, you shouldn't rely upon this.
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92 |
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93 | =head1 AUTHOR
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94 |
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95 | Tom Christiansen
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