Re: Dormus interruptus

Couldn't just send a signal to yourself to awaken the sleeping kids/threads? Here is a forking example:

[root@devel3 logtest]# cat test.pl
#!/usr/bin/perl

$SIG{INT} = sub { print "Caught zap in $$\n"; exit };

if ( my $pid = fork() ) {
    print "Parent Start\n";
    sleep 5;
    local $SIG{INT} = sub{ print "Parent $$ ignoring zap\n" };
    kill 2 => $pid, $$;
    sleep 10;
    print "Parent exit!\n";
}
else {
    print "Child start\n";
    sleep 10;
    print "Child exit!\n";
}
[root@devel3 logtest]# ./test.pl
Parent Start
Child start
Parent 21850 ignoring zap
Caught zap in 21851
Parent exit!
[root@devel3 logtest]#
[download]

cheers

tachyon

Comment on Re: Dormus interruptus Download Code

Replies are listed 'Best First'.
Re^2: Dormus interruptus by pbeckingham (Parson) on Jun 25, 2004 at 13:15 UTC
Thank you. I did not think of this, and it does exactly what I wanted, which is to interrupt the `sleep` calls.	[reply] [d/l]
Re^3: Dormus interruptus by tachyon (Chancellor) on Jun 26, 2004 at 12:22 UTC
Usual caveats about signals not being safe but if you use INT you can also catch ^C automaticlly to do a neat cleanup & exit. As an aside I also use a strategy like: `$dbh = DBI->connect( .... ); END{ $dbh->disconnect if $dbh }` [download] to ensure clean database disconnects, having exhaused the available supply of connections in the past. cheers tachyon	[reply] [d/l]

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