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#!./perl
BEGIN {
chdir 't' if -d 't';
@INC = '../lib';
require './test.pl';
}
if ($^O eq 'dos') {
skip_all("no multitasking");
}
plan tests => 3;
watchdog(10, $^O eq 'MSWin32' ? "alarm" : '');
use Config;
$| = 1;
$SIG{PIPE} = 'IGNORE';
$SIG{HUP} = 'IGNORE' if $^O eq 'interix';
my $perl = which_perl();
$perl .= qq[ "-I../lib"];
my $killsig = 'HUP';
$killsig = 1 unless $Config{sig_name} =~ /\bHUP\b/;
SKIP:
{
skip("Not relevant to $^O", 3)
if $^O eq "MSWin32" || $^O eq "VMS";
skip("only matters for waitpid or wait4", 3)
unless $Config{d_waitpid} || $Config{d_wait4};
# [perl #119893]
# close on the original of a popen handle dupped to a standard handle
# would wait4pid(0, ...)
open my $savein, "<&", \*STDIN;
my $pid = open my $fh1, qq/$perl -e "sleep 50" |/;
ok($pid, "open a pipe");
# at this point PL_fdpids[fileno($fh1)] is the pid of the new process
ok(open(STDIN, "<&=", $fh1), "dup the pipe");
# now PL_fdpids[fileno($fh1)] is zero and PL_fdpids[0] is
# the pid of the process created above, previously this would block
# internally on waitpid(0, ...)
ok(close($fh1), "close the original");
kill $killsig, $pid;
open STDIN, "<&", $savein;
}
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