Cheshire Cat Computing

When i run graphprune.pl at the prompt (exactly as it is in the script file below), I get messages like this:
[root@hnb-monitor root]# perl /home/mrtg/conf/graphprune.pl
Info: Cleaned up 349 file(s) in graphs directory.
Info: Cleaned up 0 old archive graph(s)

But everyday after the cron job I get an email to root with this message:
/etc/cron.daily/graphprune:
Illegal division by zero at /etc/cron.daily/graphprune line 10.

Here is my cron script (/etc/cron.daily/graphprune):
#!/usr/bin/perl
perl /home/mrtg/conf/graphprune.pl (this is line 10, there are comments above it).

These are the file permissions:
-rwxr-xr-x 1 root root 212 Jan 21 12:16 graphprune (/etc/cron.daily)
-rwxr-xr-x 1 root root 3812 Jan 10 14:31 graphprune.pl (/home/mrtg/conf)
-r-xr-xr-x 1 root root 238131 Nov 24 08:15 routers2.cgi (/var/www/cgi-bin)
-rw-rw-r-- 1 root root 22391 Jan 21 10:32 routers2.conf(/home/mrtg/conf)

Here are the configurable lines from graphprune.pl:
my( $conffile ) = "/home/mrtg/conf/routers2.conf";
my( $archmaxage ) = 0;

My routers2.conf file has these lines:
[graphprune]
# number of days after which to delete archived graphs
archmaxage = 0


This is a WhiteBox 3.0 respin1 Linux install, perl is 5.8.0.

This isn't a big problem, but it would be nice to find out why it's doesn't seem to work from the cron job. (Especially, since I tend to forget to do the clean up manually). Any help would be appreciated. THX

Gene White

This is your problem:

#!/usr/bin/perl
perl /home/mrtg/conf/graphprune.pl

Your are using a #! line specifying that this is a perl script, but in fact it is a shell script that calls a perl script (graphprune.pl is pa perl script, you have written a shellscript).

Try this:

#!/bin/sh
/usr/bin/perl /home/mrtg/conf/graphprune.pl

(You may need to modify the paths for /bin/sh and /usr/bin/perl depending on your system).

The 'divide by zero' error came from perl, which thought you wanted to divide 'home' by 'mrtg' when it saw home/mrtg.

_________________
Steve Shipway
UNIX Systems, ITSS, University of Auckland, NZ
Woe unto them that rise up early in the morning... -- Isaiah 5:11

DUH!!! Wow, I sure missed that one! Thanks Steve.