/usr/share/perl5/IPC/Signal.pm is in libipc-signal-perl 1.00-6.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 | # $Id: Signal.pm,v 1.4 1998-10-27 16:16:13-05 roderick Exp $
#
# Copyright (c) 1997 Roderick Schertler. All rights reserved. This
# program is free software; you can redistribute it and/or modify it
# under the same terms as Perl itself.
package IPC::Signal;
use 5.003_94; # __PACKAGE__
use strict;
use vars qw($VERSION @ISA @EXPORT_OK $AUTOLOAD %Sig_num @Sig_name);
require Exporter;
$VERSION = '1.00';
@ISA = qw(Exporter);
@EXPORT_OK = qw(sig_num sig_name sig_translate_setup %Sig_num @Sig_name);
%Sig_num = ();
@Sig_name = ();
sub sig_num ($);
sub sig_name ($);
sub sig_translate_setup () {
return if %Sig_num && @Sig_name;
require Config;
# In 5.005 the sig_num entries are comma separated and there's a
# trailing 0.
my $num = $Config::Config{'sig_num'};
if ($num =~ s/,//g) {
$num =~ s/\s+0$//;
}
my @name = split ' ', $Config::Config{'sig_name'};
my @num = split ' ', $num;
@name or die 'No signals defined';
@name == @num or die 'Signal name/number mismatch';
@Sig_num{@name} = @num;
keys %Sig_num == @name or die 'Duplicate signal names present';
for (@name) {
$Sig_name[$Sig_num{$_}] = $_
unless defined $Sig_name[$Sig_num{$_}];
}
}
# This autoload routine just is just for sig_num() and sig_name(). It
# calls sig_translate_setup() and then snaps the real function definitions
# into place.
sub AUTOLOAD {
if ($AUTOLOAD ne __PACKAGE__ . '::sig_num'
&& $AUTOLOAD ne __PACKAGE__ . '::sig_name') {
require Carp;
Carp::croak("Undefined subroutine &$AUTOLOAD called");
}
sig_translate_setup;
*sig_num = sub ($) { $Sig_num{$_[0]} };
*sig_name = sub ($) { $Sig_name[$_[0]] };
goto &$AUTOLOAD;
}
1
__END__
=head1 NAME
IPC::Signal - Utility functions dealing with signals
=head1 SYNOPSIS
$number = sig_num $name;
$name = sig_name $number;
sig_translate_setup;
$number = $Sig_num{$name};
$name = $Sig_name[$number];
=head1 DESCRIPTION
This module contains utility functions for dealing with signals.
Nothing is exported by default.
=over
=item B<sig_num> I<chopped-signal-name>
Returns the signal number of the signal whose name (sans C<SIG>) is
I<chopped-signal-name>, or undef if there is no such signal.
This function is prototyped to take a single scalar argument.
=item B<sig_name> I<signal-number>
Returns the chopped signal name (like C<HUP>) of signal number
I<signal-number>, or undef if there is no such signal.
This function is prototyped to take a single scalar argument.
=item B<sig_translate_setup>
If you want to use the @Sig_name and %Sig_num variables directly you must
call B<sig_translate_setup> to initialize them. This isn't necessary if
you only use the function interfaces sig_name() and sig_num().
This function is prototyped to take no arguments.
=item B<%Sig_num>
A hash with chopped signal name keys (like C<HUP>) and integer signal
number values.
=item B<@Sig_name>
An array mapping signal numbers to chopped signal names (like C<HUP>).
=back
=head1 AUTHOR
Roderick Schertler <F<roderick@argon.org>>
=head1 SEE ALSO
perl(1).
=cut
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