?
Solved

Check for flag file

Posted on 2014-04-05
3
Medium Priority
?
361 Views
Last Modified: 2014-04-06
I am not sure how, but I just got an error that said:

Illegal division by zero at at line... This is the line it is complaining about. I am just trying to check to see if there is a flag present, and if there is to quit the program, if there is not, to continue. I have no idea how I got to the point that it is complaining about dividing by zero.

Does anyone see where the problem is?

   if (-e $results_dir/flags/stop.flag) {
      die "STOP Flag Present. \n";
   }

Open in new window

0
Comment
Question by:stakor
3 Comments
 
LVL 28

Accepted Solution

by:
FishMonger earned 1600 total points
ID: 39980559
You forgot the quotes around the path.

if (-e "$results_dir/flags/stop.flag") {

Open in new window

0
 
LVL 85

Assisted Solution

by:ozo
ozo earned 400 total points
ID: 39980618
To see how perl was interpreting it without the quotes:
perl -MO=Deparse,-p -e '-e $results_dir/flags/stop.flag'
(-e ((($results_dir / 'flags') / 'stop') . 'flag'));

and enableing warnings:
perl -w -e '-e $results_dir/flags/stop.flag'
Unquoted string "flags" may clash with future reserved word at -e line 1.
Unquoted string "stop" may clash with future reserved word at -e line 1.
Unquoted string "flag" may clash with future reserved word at -e line 1.
Name "main::results_dir" used only once: possible typo at -e line 1.
Argument "flags" isn't numeric in division (/) at -e line 1.
Use of uninitialized value $results_dir in division (/) at -e line 1.
Illegal division by zero at -e line 1.
0
 

Author Closing Comment

by:stakor
ID: 39981064
FishMonger had the correct answer. Ozo went way out the way to provide a very detailed answer. I wish I could add more points.
0

Featured Post

[Webinar] Database Backup and Recovery

Does your company store data on premises, off site, in the cloud, or a combination of these? If you answered “yes”, you need a data backup recovery plan that fits each and every platform. Watch now as as Percona teaches us how to build agile data backup recovery plan.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

There are many situations when we need to display the data in sorted order. For example: Student details by name or by rank or by total marks etc. If you are working on data driven based projects then you will use sorting techniques very frequently.…
Checking the Alert Log in AWS RDS Oracle can be a pain through their user interface.  I made a script to download the Alert Log, look for errors, and email me the trace files.  In this article I'll describe what I did and share my script.
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
Six Sigma Control Plans
Suggested Courses

616 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question