Catching errors in system call in Perl?

Posted on 2011-03-22
Last Modified: 2012-06-27
Is there anything wrong in this code? Especially on line 4 and 11.

          system("java -jar");
          if ($? == -1) {
              #send email 
              sendEmail("$", "", "logging Failed", "failed to execute: $!\n");
          } elsif ($? & 127) {
              printf "child died with signal %d, %s coredump\n",
                ($? & 127),  ($? & 128) ? 'with' : 'without';
              my $signal = ($? & 127);
              my $woCoredump = ($? & 128) ? 'with' : 'without';
              #send email
              sendEmail("$", "", "Logging Failed", "child died with signal $signal, $woCodedump coredump\n");
          } else {
              # Don't do anything because it is a successful system call.

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and this is the sendEmail sub function

# Email Function
    #($to, $from, $subject, $message)
    sub sendEmail
          my ($to, $from, $subject, $message) = @_;
          my $sendmail = '/usr/lib/sendmail';
          open(MAIL, "|$sendmail -oi -t");
          print MAIL "From: $from\n";
          print MAIL "To: $to\n";
          print MAIL "Subject: $subject\n\n";
          print MAIL "$message\n";

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Question by:Tolgar
  • 3
  • 2
LVL 15

Accepted Solution

DonConsolio earned 250 total points
ID: 35190083
> sendEmail("$", "", "logging Failed", "failed to execute: $!\n");

omit the "$" before somename1
sendEmail("", "", "logging Failed", "failed to execute: $!\n");

Author Comment

ID: 35191137
Sounds good. So is this rest of my code is right?

I can't run and check it for now that is why I am asking.

LVL 84

Expert Comment

ID: 35192138
Do you want to backquote the @ or do you want to interpolate an array named @mywork?
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LVL 84

Expert Comment

ID: 35192150
Or you may want to use q'' instead of qq""

Author Comment

ID: 35192263
I don;t know what you mean by backquote but I want to send email to this email address:

Then should I use \ before @ as the following?


LVL 84

Assisted Solution

ozo earned 250 total points
ID: 35192595


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