08-01-2008
inserting grep -c value into an email subject
I am profoundly new to *nix, but had a project dropped in my lap that has sparked an interest, leading me here.
I was tasked with daily sending one of our customers a listing of all the spam our filter blocked that was heading for them.
Between Google and I;
I discovered the Server is running Linux version 2.6.11-gentoo-r4.
I learned the basics of grep enough to pare down the amavis.log file to only the pertinent data and figured out how to get it mailed out.
I added a crontab to do this daily, and the job was done to the customer's satisfaction.
Unfortunately, I cannot leave well enough alone, and decided I wanted to have the email subject include the total blocked messages.
grep -c Blocked gives me the total, but I have not been able to track down how to modify the mail subject to reflect this.
I attempted to assign n = grep -c Blocked /var/amavis/amavis.log, but $n just echos as grep.
Pointing out where I'm screwing up or directing me to a link where I can find the info would be greatly appreciated.
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ZGREP(1) General Commands Manual ZGREP(1)
NAME
zgrep - search possibly compressed files for a regular expression
SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename...
DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code:
(-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the
standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep.
If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.
EXIT CODE
2 - An option that is not supported was specified.
AUTHOR
Charles Levert (charles@comm.polymtl.ca)
SEE ALSO
grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)
ZGREP(1)