晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //usr/share/doc/perl-Test-Simple/t/Test2/behavior/ipc_wait_timeout.t
use strict;
use warnings;

# The things done in this test can trigger a buggy return value on some
# platforms. This prevents that. The harness should catch actual failures. If
# no harness is active then we will NOT sanitize the exit value, false fails
# are better than false passes.
END { $? = 0 if $ENV{HARNESS_ACTIVE} }

# Some platforms throw a sigpipe in this test, we can ignore it.
BEGIN { $SIG{PIPE} = 'IGNORE' }

BEGIN { local ($@, $?, $!); eval { require threads } }
use Test2::Tools::Tiny;
use Test2::Util qw/CAN_THREAD CAN_REALLY_FORK/;
use Test2::IPC;
use Test2::API qw/test2_ipc_set_timeout test2_ipc_get_timeout/;

my $plan = 2;
$plan += 2 if CAN_REALLY_FORK;
$plan += 2 if CAN_THREAD && threads->can('is_joinable');
plan $plan;

is(test2_ipc_get_timeout(), 30, "got default timeout");
test2_ipc_set_timeout(10);
is(test2_ipc_get_timeout(), 10, "hanged the timeout");

if (CAN_REALLY_FORK) {
    note "Testing process waiting";
    my ($ppiper, $ppipew);
    pipe($ppiper, $ppipew) or die "Could not create pipe for fork";

    my $proc = fork();
    die "Could not fork!" unless defined $proc;

    unless ($proc) {
        local $SIG{ALRM} = sub { die "PROCESS TIMEOUT" };
        alarm 15;
        my $ignore = <$ppiper>;
        exit 0;
    }

    my $exit;
    my $warnings = warnings {
        $exit = Test2::API::Instance::_ipc_wait(1);
    };
    is($exit, 255, "Exited 255");
    like($warnings->[0], qr/Timeout waiting on child processes/, "Warned about timeout");
    print $ppipew "end\n";

    close($ppiper);
    close($ppipew);
}

if (CAN_THREAD) {
    note "Testing thread waiting";
    my ($tpiper, $tpipew);
    pipe($tpiper, $tpipew) or die "Could not create pipe for threads";

    my $thread = threads->create(
        sub {
            local $SIG{ALRM} = sub { die "THREAD TIMEOUT" };
            alarm 15;
            my $ignore = <$tpiper>;
        }
    );

    if ($thread->can('is_joinable')) {
        my $exit;
        my $warnings = warnings {
            $exit = Test2::API::Instance::_ipc_wait(1);
        };
        is($exit, 255, "Exited 255");
        like($warnings->[0], qr/Timeout waiting on child thread/, "Warned about timeout");
    }
    else {
        note "threads.pm is too old for a thread joining timeout :-(";
    }
    print $tpipew "end\n";

    close($tpiper);
    close($tpipew);
}

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