Thanks for your prompt reply BrowserUK. That still doesn't do the trick. The following code is used to include the Perl::Unsafe::Signals module. 
      use Perl::Unsafe::Signals;
      print "Evaluating... \n";
      #eval{
         local $SIG{ALRM} = sub {
            $sys_check_mount{$mount_server} = 0;
            print "Alarm!";
            exit();
         };
         alarm(5);
         print "Alarm Set... Trying system commands... \n";
         UNSAFE_SIGNALS {
            print "Using unsafe signals... \n";
            if (-e $mount_server_check_path && utime(undef, undef, "$m
+ount_server_check_path/mount_check")){
               #print "OK\n";
               $sys_check_mount{$mount_server} = 1;
            }else{
               #print "Broken\n";
               $sys_check_mount{$mount_server} = 0;
               push (@mount_server_broken,$mount_server);
            }
         };
         alarm(0);
         print "Reset Alarm... \n";

[download]
Any other suggestions are appreciated :) Upon further investigation it seems something must be a-miss somewhere else in the program. The following code sniplet alarm's just fine: 
perl -e 'alarm shift @ARGV; exec @ARGV' 3 touch /node/store1/videos/mo
+unt_check

[download]

In reply to Re^4: Alarm and blocking I/O. by expresspotato
in thread Alarm and blocking I/O. by expresspotato

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