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random: raise error for bad option #720

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merged 1 commit into from
Aug 14, 2024
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random: raise error for bad option #720

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49 changes: 12 additions & 37 deletions bin/random
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Original file line number Diff line number Diff line change
Expand Up @@ -15,45 +15,15 @@ License: perl
use strict;
use Getopt::Std;

my ($VERSION) = '1.2';
my ($VERSION) = '1.3';

my $warnings = 0;

END {
close STDOUT || die "$0: can't close stdout: $!\n";
$? = 1 if $? == 255; # from die
}

# Print a usuage message on a unknown option.
# Requires my patch to Getopt::Std of 25 Feb 1999.
$SIG {__WARN__} = sub {
if (substr ($_ [0], 0, 14) eq "Unknown option") {die "Usage"};
require File::Basename;
$0 = File::Basename::basename ($0);
$warnings = 1;
warn "$0: @_";
};

$SIG {__DIE__} = sub {
require File::Basename;
$0 = File::Basename::basename ($0);
if (substr ($_ [0], 0, 5) eq "Usage") {
die <<EOF;
$0 (Perl game utils) $VERSION
$0 [-er] [denominator]
EOF
}
die "$0: @_";
};

# Get the options.
getopts ('er', \my %options);

die "Usage" if @ARGV > 1;

my $denominator = @ARGV ? shift : 2;

die "Usage" if $denominator =~ /\D/ || $denominator == 0;
my %options;
getopts('er', \%options) or usage();
my $denominator = shift;
$denominator = 2 unless defined $denominator;
usage() if @ARGV;
usage() if $denominator =~ /\D/ || $denominator == 0;

exit int rand $denominator if exists $options {e};

Expand All @@ -65,6 +35,11 @@ while (<>) {print if $frac >= rand;}

exit $warnings;

sub usage {
warn "usage: $0 [-er] [denominator]\n";
exit 1;
}

__END__

=pod
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