Hello again jamesgerard1964,

One might find useful the exit_status from each system call. The MCE::Shared module is helpful in that regard.

On purpose, am making a slight change to using MCE::Loop. The comma is needed after the sub { ... } block before @servers. Basically, am calling three methods: ->init to configure MCE options, ->run to run the code block, and finally ->finish to shutdown and reap workers. Afterwards, like to see the system status captured into the shared hash.

use strict;
use warnings;

use MCE::Loop;
use MCE::Shared;

my @servers = ('a'..'z');
my $timeout = 10;
my $user    = "foo";
my $file    = "/tmp/hello.txt";
my $rpath   = "/tmp";
my $fname   = "hello.txt";

tie my %result, 'MCE::Shared';

MCE::Loop->init(
   chunk_size  => 1,
   max_workers => 8,
);

MCE::Loop->run( sub {
  my $server = $_;
  MCE->say("child process running, with a key of $server ($$)");
  eval {
     local $SIG{ALRM} = sub { alarm 0; die "alarm\n" };
     alarm $timeout;
     $result{$server} = system("scp -p $file $user\@$server:$rpath/$fn
+ame");
  };
  alarm 0;
}, @servers );

MCE::Loop->finish;

for my $server ( sort keys %result ) {
  my ($status, $signum);

  $status = $result{$server};
  $signum = $status & 127;    # extract signal number
  $status = $status >> 8;     # becomes exit status

  print "$server: exit_status $status, signal_num $signum\n";
}

[download]

Thank you for reaching out to Perlmonks.

In reply to Re^3: Parallel::Forkmanager question by Anonymous Monk
in thread Parallel::Forkmanager question by jamesgerard1964

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.