7 use POSIX qw/SIGINT SIGTERM SIGKILL SIGHUP EXIT_FAILURE/;
9 use IPC::MorseSignals qw/msend mrecv mreset/;
11 use base qw/Exporter/;
13 our @EXPORT_OK = qw/try speed init cleanup/;
15 my ($lives, $pid, $rdr);
19 die 'forked too many times' if $lives < 0;
20 pipe $rdr, my $wtr or die "pipe() failed: $!";
23 die "fork() failed: $!";
26 close $rdr or die "close() failed: $!";
27 my $rcv = mrecv %SIG, cb => sub {
28 binmode $wtr, ':utf8' if Encode::is_utf8 $_[1];
30 print $wtr $_[0], ':', $_[1], "\n";
33 $SIG{HUP} = sub { mreset $rcv };
34 $SIG{__WARN__} = sub {
36 print $wtr "__WARN__\n";
42 close $wtr or die "close() failed: $!";
58 sub cleanup { slaughter }
61 my ($msg, $sign) = @_;
66 binmode $rdr, ((Encode::is_utf8 $msg) ? ':utf8' : ':crlf');
67 while (!$ok && (($speed /= 2) >= 1)) {
70 local $SIG{ALRM} = sub { die 'timeout' };
71 local $SIG{__WARN__} = sub { alarm 0; die 'do not want warnings' };
72 my $a = (int(100 * (3 * length $msg) / $speed) || 1);
76 msend $msg => $pid, speed => $speed, sign => $sign;
80 if (!defined $r) { # Something bad happened, respawn
81 close $rdr or die "close() failed: $!";
86 if ($r eq ((($sign) ? $$ : 0) . ':' . $msg)) {
93 return ($ok) ? $speed : 0;
97 my ($l, $n, $diag, $res) = @_;
100 my @alpha = ('a' .. 'z');
101 my $msg = join '', map { $alpha[rand @alpha] } 1 .. $l;
102 my $desc_base = "$l bytes sent $n times";
103 while (($ok < $n) && (($speed /= 2) >= 1)) {
105 my $desc = "$desc_base at $speed bits/s";
106 $diag->("try $desc...");
111 local $SIG{ALRM} = sub { die 'timeout' };
112 local $SIG{__WARN__} = sub { alarm 0; die 'do not want warnings' };
113 my $a = (int(100 * (3 * $l) / $speed) || 1);
117 msend $msg => $pid, speed => $speed, sign => 0;
121 if (!defined $r) { # Something bad happened, respawn
122 close $rdr or die "close() failed: $!";
128 if ($r eq '0:' . $msg) {
137 push @$res, $desc_base . (($speed) ? ' at ' . $speed . ' bits/s' : ' failed');