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Diffstat (limited to 'Master/tlpkg/tlperl/lib/User/grent.pm')
-rw-r--r-- | Master/tlpkg/tlperl/lib/User/grent.pm | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/Master/tlpkg/tlperl/lib/User/grent.pm b/Master/tlpkg/tlperl/lib/User/grent.pm new file mode 100644 index 00000000000..ce6ee5ea447 --- /dev/null +++ b/Master/tlpkg/tlperl/lib/User/grent.pm @@ -0,0 +1,95 @@ +package User::grent; +use strict; + +use 5.006_001; +our $VERSION = '1.01'; +our(@EXPORT, @EXPORT_OK, %EXPORT_TAGS); +BEGIN { + use Exporter (); + @EXPORT = qw(getgrent getgrgid getgrnam getgr); + @EXPORT_OK = qw($gr_name $gr_gid $gr_passwd $gr_mem @gr_members); + %EXPORT_TAGS = ( FIELDS => [ @EXPORT_OK, @EXPORT ] ); +} +use vars @EXPORT_OK; + +# Class::Struct forbids use of @ISA +sub import { goto &Exporter::import } + +use Class::Struct qw(struct); +struct 'User::grent' => [ + name => '$', + passwd => '$', + gid => '$', + members => '@', +]; + +sub populate (@) { + return unless @_; + my $gob = new(); + ($gr_name, $gr_passwd, $gr_gid) = @$gob[0,1,2] = @_[0,1,2]; + @gr_members = @{$gob->[3]} = split ' ', $_[3]; + return $gob; +} + +sub getgrent ( ) { populate(CORE::getgrent()) } +sub getgrnam ($) { populate(CORE::getgrnam(shift)) } +sub getgrgid ($) { populate(CORE::getgrgid(shift)) } +sub getgr ($) { ($_[0] =~ /^\d+/) ? &getgrgid : &getgrnam } + +1; +__END__ + +=head1 NAME + +User::grent - by-name interface to Perl's built-in getgr*() functions + +=head1 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); + +=head1 DESCRIPTION + +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 F<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 C<gr_>. Thus, C<$group_obj-E<gt>gid()> corresponds +to $gr_gid if you import the fields. Array references are available as +regular array variables, so C<@{ $group_obj-E<gt>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 C<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 C<CORE::> pseudo-package. + +=head1 NOTE + +While this class is currently implemented using the Class::Struct +module to build a struct-like class, you shouldn't rely upon this. + +=head1 AUTHOR + +Tom Christiansen |