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#!/usr/bin/env perl
use strict;
use warnings;
use 5.010;
use File::ShareDir qw(dist_file);
use Getopt::Long;
use IO::Handle;
use IPC::Run qw(harness);
use SDL::Mixer;
use SDL::Music;
use Term::Size;
use Time::HiRes qw(usleep);
our $VERSION = '0.0';
my $beep = 0;
my $id = 0;
my $rtt = 0;
my $last_id = 0;
my $dead_count = 0;
my $column = 0;
my $column_max = Term::Size::chars;
my $beep_file = dist_file( 'ekgping', 'beep.ogg' );
my $quiet = 0;
GetOptions(
'f|beep-file=s' => \$beep_file,
'q|quiet' => \$quiet,
'V|version' => sub { say "ekgping version ${VERSION}"; exit 0 },
) or usage();
my $host = shift or usage();
my @ping_opts = @ARGV;
my $mixer = SDL::Mixer->new();
my $beep_sound = SDL::Music->new($beep_file);
my $ping = harness(
[ 'ping', '-n', @ping_opts, $host ],
'<' => \undef,
'>&' => \&parse_ping_output,
);
local $SIG{INT} = \&quit;
local $SIG{TERM} = \&quit;
local $SIG{QUIT} = \&quit;
sub parse_ping_output {
my ($line) = @_;
chomp($line);
if (
$line =~ m{ ^ \d+ \s bytes \s from \s \S+ \s
icmp_req = (?<id> \d+ ) \s
ttl = (?<ttl> \d+ ) \s
time = (?<time> [\d.]+) \s ms }x
)
{
$id = $+{id};
$rtt = $+{time};
}
return;
}
sub quit {
$ping->kill_kill( grace => 1 );
print "\e[?25h";
exit 0;
}
sub usage {
die("Usage: $0 [options] <host>\n");
}
$ping->start();
# Ignore first line
$ping->pump();
if ( not $quiet ) {
$mixer->play_music( $beep_sound, 999_999 );
$mixer->pause_music();
}
print "\e[?25l";
while ( usleep(100_000) ) {
if ($ping->pumpable()) {
$ping->pump_nb();
}
elsif (($dead_count % 10) == 0)
$ping->start();
}
$column++;
if ( $column == $column_max ) {
print "\r";
$column = 0;
}
if ( $column != $column_max ) {
print "\e[1C \e[2D";
}
if ( $id != $last_id ) {
$beep = 1;
if ( $rtt < 300 ) {
print q{^};
}
else {
print q{-};
}
$last_id = $id;
$dead_count = 0;
}
else {
$beep = 0;
$dead_count++;
if ( $dead_count > 30 ) {
$beep = 1;
}
print q{_};
}
STDOUT->flush();
if ( not $quiet ) {
if ($beep) {
$mixer->resume_music();
}
else {
$mixer->pause_music();
}
}
}
$ping->kill_kill( grace => 1 );
__END__
=head1 NAME
B<ekgping> - Electrocardiograph-like visual and audible ping
=head1 SYNOPSIS
B<ekgping> [B<-q>] [B<-f> I<file>] I<host> [B<--> I<ping options>]
=head1 VERSION
version 0.0
=head1 DESCRIPTION
B<ekgping> pings a I<host>. Unlike ping(1), it does not output text, but
instead displays the results in a visual and audible manner, somewhat similar
to an electrocardiograph (short ECG / EKG).
It displays a line on the whole width of the terminal. By default, the line is
flat ("_"). Everytime a pong gets in, a spike ("^" or "-", depending on RTT)
is drawn.
Also, everytime a pong is received, a short beep is played. If the host does
not respond for a few seconds (i.e. is unreachable/dead), B<ekgping> produces
a continuous beep until the host is reachable again.
If specified, I<ping options> are passed on to ping(1). Note that B<ekgping>
does not look at them - if they change the output format or set the ping
interval too high, B<ekgping> will break.
=head1 OPTIONS
=over
=item B<-f>, B<--beep-file> I<file>
Play I<file> instead of the default beeps. May be any sound / music file
=item B<-q>, B<--quiet>
Do not play beeps, visual output only
=item B<-V>, B<--version>
Show version information and exit
=back
=head1 EXIT STATUS
Zero.
=head1 CONFIGURATION
None.
=head1 DEPENDENCIES
=over
=item * ping(1)
=item * File::ShareDir(3pm)
=item * IPC::Run(3pm)
=item * SDL(3pm)
=item * Term::Size(3pm)
=back
=head1 BUGS AND LIMITATIONS
B<ekgping> parses the output of ping(1), which means it assumes a certain
output style. It will only work with ping(1) programs whose C<< ping -n >> output matches
"<digit> bytes from <ip>: icmp_req=<digit> ttl=<digit> time=<float>".
=head1 AUTHOR
Copyright (C) 2011 by Daniel Friesel E<lt>derf@finalrewind.orgE<gt>
=head1 LICENSE
0. You just DO WHAT THE FUCK YOU WANT TO.
|
