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#!/usr/bin/perl
=pod
=head1 NAME
eintr.t - Test select() and read() failing with EINTR
=cut
use strict;
use warnings;
BEGIN {
$| = 1;
$^W = 1;
if ( $ENV{PERL_CORE} ) {
chdir '../lib/IPC/Run' if -d '../lib/IPC/Run';
unshift @INC, 'lib', '../..';
$^X = '../../../t/' . $^X;
}
}
use Test::More;
use IPC::Run qw( start run );
my $got_usr1 = 0;
$SIG{USR1} = sub { $got_usr1++ };
# Need the child to send a signal to this process in order to trigger
# EINTR on select(), skip the test on platforms where we can't do that.
my ( $in, $out, $err ) = ( '', '', '' );
run [ $^X, '-e', "kill 'USR1', $$" ], \$in, \$out, \$err;
if ( $got_usr1 != 1 ) {
plan skip_all => "can't deliver a signal on this platform";
}
plan tests => 5;
# A kid that will send SIGUSR1 to this process and then produce some output.
my $kid_perl = qq[sleep 1; kill 'USR1', $$; sleep 1; print "foo\n"; sleep 180];
my @kid = ( $^X, '-e', "\$| = 1; $kid_perl" );
# If EINTR on select() is not handled properly then IPC::Run can think
# that one or more kid output handles are ready for reads when they are
# not, causing it to block until the kid exits.
( $in, $out, $err ) = ( '', '', '' );
my $harness = start \@kid, \$in, \$out, \$err;
my $pump_started = time;
$harness->pump;
is $out, "foo\n", "got stdout on the first pump";
ok time - $pump_started < 180, "first pump didn't wait for kid exit";
is $got_usr1, 2, 'got USR1 from the kid';
$harness->kill_kill;
$harness->finish;
# Have kid send SIGUSR1 while we're in read of sync pipe. That pipe conveys any
# exec failure to us.
SKIP: {
if ( IPC::Run::Win32_MODE() ) {
skip "Can't really exec() $^O", 2;
}
my $expected = 'exec failed';
my $h = eval {
start(
[ $^X, "-e", 1 ],
_sigusr1_after_fork => 1,
_simulate_exec_failure => 1
);
};
my $got = $@ =~ $expected ? $expected : $@ || "";
is $got_usr1, 3, 'got USR1 from the _simulate_exec_failure kid';
is( $got, $expected, "reported exec failure despite USR1" );
}
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