use Forks::Super ':test';
use Forks::Super::Util qw(is_pipe IS_WIN32);
use Test::More tests => 9;
use strict;
use warnings;
sub _read_pipe_that_might_be_a_socket {
# on MSWin32, we almost never use pipes
my $handle = shift;
return $Forks::Super::Job::Ipc::USE_TIE_SH
|| !Forks::Super::Util::is_socket($handle)
? <$handle>
: Forks::Super::Job::Ipc::_read_socket($handle, undef, 0);
}
#
# test whether a parent process can have access to the
# STDIN, STDOUT, and STDERR filehandles of a child
# process. This features allows for communication
# between parent and child processes.
#
# this is a subroutine that copies STDIN to STDOUT and optionally STDERR
sub repeater {
Forks::Super::debug("repeater: method beginning") if $Forks::Super::DEBUG;
my ($n, $e) = @_;
my $end_at = time + 6;
my ($input_found, $input) = 1;
my $curpos;
local $!;
binmode STDOUT; # for Windows compatibility
binmode STDERR; # has no bad effect on other OS
Forks::Super::debug("repeater: ready to read input") if $Forks::Super::DEBUG;
while (time < $end_at) {
while ($_ = _read_pipe_that_might_be_a_socket(*STDIN)) {
if ($Forks::Super::DEBUG) {
$input = substr($_,0,-1);
$input_found = 1;
Forks::Super::debug("repeater: read \"$input\" on STDIN/",
fileno(*STDIN));
}
if ($e) {
print STDERR $_;
if ($Forks::Super::DEBUG) {
Forks::Super::debug("repeater: wrote \"$input\" to STDERR/",
fileno(*STDERR));
}
}
for (my $i = 0; $i < $n; $i++) {
print STDOUT "$i:$_";
if ($Forks::Super::DEBUG) {
Forks::Super::debug("repeater: wrote [$i] '$input' to STDOUT/",
fileno(*STDOUT));
}
}
}
if ($Forks::Super::DEBUG && $input_found) {
$input_found = 0;
Forks::Super::debug("repeater: no input");
}
Forks::Super::pause();
}
}
#######################################################
# test read_stderr -- this is the last significant failure point from 0.08
# the usual error is that @err contains one line instead of two
# let's retest with debugging if we detect that this test is going to fail ...
sub read_stderr_test {
my $pid = fork { sub => \&repeater , args => [ 3, 1 ] , timeout => 10,
child_fh => "in,err,pipe" };
my $z = 0;
if (isValidPid($pid)) {
my $msg = sprintf "the message is %x", rand() * 99999999;
my $pid_stdin_fh = $Forks::Super::CHILD_STDIN{$pid};
$z = print $pid_stdin_fh "$msg\n";
if ($Forks::Super::DEBUG) {
Forks::Super::debug("Printed \"$msg\\n\" to child stdin ($pid). ",
"Result:$z");
}
sleep 1;
$z = print $pid_stdin_fh "That was a test\n";
if ($Forks::Super::DEBUG) {
Forks::Super::debug("Printed \"That was a test\\n\" ",
"to child stdin ($pid). Result:$z");
}
if ($Forks::Super::DEBUG) {
Forks::Super::debug("Closed filehandle to $pid STDIN");
}
}
return ($z,$pid);
}
my ($z,$pid) = &read_stderr_test;
ok(isValidPid($pid), "started job with join");
ok($z > 0, "successful print to child STDIN");
SKIP: {
if (&IS_WIN32 && !$ENV{WIN32_PIPE_OK}) {
skip "using sockets instead of pipes on Win32", 3;
}
ok((defined($Forks::Super::CHILD_STDIN{$pid})
and is_pipe($Forks::Super::CHILD_STDIN{$pid})), "CHILD_STDIN is a pipe");
ok(!defined($Forks::Super::CHILD_STDOUT{$pid}),
"CHILD_STDOUT not defined pid $pid");
ok((defined($Forks::Super::CHILD_STDERR{$pid}))
&& is_pipe($Forks::Super::CHILD_STDERR{$pid}), "CHILD_STDERR is a pipe");
}
Forks::Super::close_fh($pid, 'stdin');
my $t = time;
my @out = ();
my @err = ();
while (time < $t+12) {
my @data = Forks::Super::read_stdout($pid);
push @out, @data if @data>0 and $data[0] ne "";
@data = Forks::Super::read_stderr($pid);
push @err, @data if @data>0 and $data[0] ne "";
}
ok(@out == 0, "received no output from child");
@err = grep { !/alarm\(\) not available/ } @err;
if (@err != 2) {
print STDERR "\ntest read stderr: failure imminent.\n";
print STDERR "Expecting two lines but what we get is:\n";
my $i;
print STDERR map { ("Error line ", ++$i , ": $_") } @err;
print STDERR "\n";
print STDERR "Rerunning read_stderr test with debugging on ...\n";
# retest with debugging -- let's see if we can figure out what's going on
$Forks::Super::DEBUG = 1;
($z,$pid) = &read_stderr_test;
$t = time;
$i = 0;
@err = ();
while (time < $t+12) {
my @data = Forks::Super::read_stderr($pid);
push @err, @data if @data>0 and $data[0] ne "";
}
print STDERR "Standard error from retest:\n";
print STDERR map { ("Error line ", ++$i, ": $_") } @err;
@err = grep { !/repeater:/ && !/alarm/ } @err;
}
ok(@err == 2, "received 2 lines from child stderr");
ok($err[0] =~ /the message is/, "got Expected first line from child error");
ok($err[-1] =~ /a test/, "got Expected second line from child error");
waitall;
$Forks::Super::DEBUG = 0;