I'm trying to set up a ctrl/C handler in conjunction with a blocking read (Linux::Inotify2) within a thread. Neither of the approaches works, i.e. in neither case does the "Sighandler x tripped" ... "Exited while." appear. What do I need to do to get it to "behave"?

Thanks! 
#!/usr/bin/perl

use Cwd;
use Data::Dumper;
use Linux::Inotify2;
use threads;
use Thread::Queue;
use Time::HiRes;
use strict;
use warnings;


    $|++;

    my($ToBeDone_q);
    my(@Worker_a);
    {
        $ToBeDone_q=Thread::Queue->new();
        push(@Worker_a,threads->new(\&Watchdog,$ToBeDone_q));
         };

    # Process the queued up signals
    while (my($Request_s)=$ToBeDone_q->dequeue()) { 
        warn ''.Data::Dumper->Dump([\$Request_s],[qw(*Request_s)]).' '
+;
        if ($Request_s eq 'All done!') {
            # Took one "All Done!" off
            last;
             }
        else { # Perform the work if possible
            my(%_h); eval $Request_s;
            # Do what you want to do with the results from the watchdo
+g
            ToBeDone();
             };
         };

    grep {$_->join;} @Worker_a;
    # Just In Case!
    while ( my(@list)=threads->list()) {
        print "$#list\n";
        grep { $_->join } @list;
         };

    exit;

sub Watchdog {
    my($ToBeDone_q)=@_;

    print "Starting thread.\n";
    my $Inotify_o=Linux::Inotify2->new();
    $Inotify_o->watch(Cwd::abs_path('.'),IN_ALL_EVENTS);
    my $Done_f:shared;
    # Ctrl/c signal handler 1 - doesn't seem to work
    #$SIG{INT}=$SIG{TERM}=$SIG{HUP}=sub { # ?
    #
    #    print "SignalHandler 1 tripped!\n";
    #   lock $Done_f;
    #    $Done_f=1;
    #    print "Attempting to unblock Inotify\n";
    #    $Inotify_o->blocking(0);
    #    print "Inotify unblocked!\n"
    #     }; # SignalHandler: Done
    # Ctrl/c signal handler 2 - doesn't seem to work ...
    sub _Sighandler {
        print "SignalHandler 2 tripped!\n";
        lock $Done_f;
        $Done_f=1;
        print "Attempting to unblock Inotify\n";
        $Inotify_o->blocking(0);
        print "Inotify unblocked!\n"
         }; # SignalHandler: Done
    #$SIG{INT}=$SIG{TERM}=$SIG{HUP}=\&_Sighandler;
    print "Starting while.\n";
    while (!$Done_f) {
        print "Waiting on read.\n";
        my @events_ao = $Inotify_o->read;
        print "read has been unblocked.\n";
        unless (@events_ao > 0){
            print "read error: $!";
             } else { # To Do!
            foreach my $event_o (@events_ao) {
                print $event_o->fullname . " was modified\n" if $event
+_o->IN_MODIFY;
                if ($event_o->fullname =~ m{\.pm$} && $event_o->IN_CLO
+SE_WRITE) { # Have a module
                     }
                elsif ($event_o->fullname =~ m{\.(?:cgi|pl)$} && $even
+t_o->IN_CLOSE_WRITE) { # Have a script
                     };
                 };
             };
        print "Continuing while.\n";
         };
    print "Exited while.\n";
    print "Exiting thread.\n";
    return;
     };
__END__

[download]

In reply to Interrupting a blocking read (Linux::Inotify2) with a signal handler within a thread by clueless newbie

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.