1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
#!/usr/bin/perl -w
## Submitted by Blair Zajac <blair@orcaware.com>
## Tests blocking when piping though a &sub coprocess.
## Fixed, now in test suite.
$| = 1;
use strict;
use Carp;
use Symbol;
use IPC::Run 0.44 qw(start);
print "My pid is $$\n";
my $out_fd = gensym;
open($out_fd, ">ZZZ.test") or
die "$0: open: $!\n";
my $queue = '';
my @commands = ([['cat', '-'], \$queue, '|'],
[['cat'], '|'],
[\&double, '>', $out_fd]);
my $harness = start 'debug' => 10, map { @$_ } @commands;
$harness or
die "$0: harness\n";
close($out_fd) or
die "$0: cannot close: $!\n";
for (1..100) {
$queue .= rand(100) . "\n";
$harness->pump;
}
$harness->finish or
die "$0: finish\n";
exit 0;
sub double {
while (<STDIN>) {
s/\s+$//;
print "$_ $_\n";
}
}
|
