This is getting me all sorts of frustrated. I have reverted to trying a simple test script and external program. The external program does nothing more than print a counter and then sleep for 1 second. I cannot seem to get its output while it is executing...Here is the code for both. Any help would be GREATLY appreciated...
the "child" program:
#!/usr/bin/env perl
use strict;
use warnings;
use 5.016;
use Carp qw(cluck carp croak);
my $c=1;
for(1..15) {
say 'COUNT: '.$c;
$c++;
sleep(1);
}
And here is the "parent" program...again, I am open to ANY solution that works. By "works", I mean that I need the output of the child program to be printed as it comes in. For the "real" program, I will need to send a web socket message every time output is received from the child program...the output will be a progress indicator (e.g. 10% complete, 15% complete, etc.).
First, with Capture::Tiny: (no dice)
#!/usr/bin/env perl
use strict;
use warnings;
use 5.016;
use Carp qw(cluck carp croak);
use Data::Dumper;
use Capture::Tiny ':all';
local $| = 1;
my $cmd = "/tempssd/bossert/bin/testchild.pl &";
my ($stdout, $stderr, @result) = tee { system($cmd); };
while (my $line = <$stdout>) {
say 'GOT: '.$line;
last if $line =~ m/^FINISHED/;
}
Next, with IPC::Run: (Note, I get the STDOUT AFTER it runs...and it seems that the code ref for the stdout handling never fires.
#!/usr/bin/env perl
use strict;
use warnings;
use 5.016;
use Carp qw(cluck carp croak);
use Data::Dumper;
use IPC::Run qw(run);
local $| = 1;
my @cmd = ("/tempssd/bossert/bin/testchild.pl");
run \@cmd, '<', \undef,'>&',\&stdoutH or die "cat: $?";
sub stdoutH {
my ($in) = @_;
chomp $in;
say 'STDOUT: '.$in;
}
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