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Full Discussion: Would appreciate a quick second set of eyes on a script (regarding doing things in the background)
Top Forums Shell Programming and Scripting Would appreciate a quick second set of eyes on a script (regarding doing things in the background) Post 302435495 by DeCoTwc on Wednesday 7th of July 2010 05:57:36 PM
Old 07-07-2010
---------- Post updated at 05:57 PM ---------- Previous update was at 01:07 PM ----------

[/COLOR]Just an update, this is the version I wound up going with. It seems to be working fine, but I suppose I won't really know for sure until after 1230

Code:
#!/bin/bash
######################################################
# Program:      networkCap.sh
# Date Created: 7 July 2010
# Date Updated: NA
# Developer:    G B (Support Manager) && D D (Support Engineer)
# Description:  runs tcpdump on management netwok and automatically starts a new capture each day and zips the old one
######################################################

PCAPFILE=/tmp/mgmt.$(date "+%H.%M.%S.%m.%d").pcap

tcpdump -i eth0 -nnvv -s 1500 net 10.248.89 -w $PCAPFILE   2>&1 &
dumpPid=$!


TDATE=$(date --date='-1 days ago' "+%m.%d.%y")
DATE=$(date "+%m.%d.%y")


killDump ()
{
    kill $dumpPid
}


zipPcap ()
{
    gzip -c $1 > $1.gz && rm $1 &
}


    while true; do
        until [[ "$DATE" == "$TDATE" ]]; do
            sleep 1800
            DATE=$(date "+%m.%d.%y")
        done
        killDump
        zipPcap $PCAPFILE
        PCAPFILE=/tmp/mgmt.$(date "+%H.%M.%S.%m.%d").pcap
        tcpdump -i eth0 -nnvv -s 1500 net 10.248.89 -w $PCAPFILE   2>&1 &
        dumpPid=$!
        TDATE=$(date --date='-1 days ago' "+%m.%d.%y")
        DATE=$(date "+%m.%d.%y")
    done

Last edited by DeCoTwc; 07-07-2010 at 11:36 PM.. Reason: Finally realized just how wrong I was about methyl's advice and fixed things
 

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LEARN ABOUT OSF1

uudemon

uudemon(4)						     Kernel Interfaces Manual							uudemon(4)

NAME

       uudemon.admin,  uudemon.cleanu,	uudemon.hour,  uudemon.poll  -	Administrative shell scripts for polling remote systems, cleaning up spool
       directories, reporting status to the system administrator, and routine invocations of the uuxqt and uusched daemons

SYNOPSIS

       These shell scripts reside in the following directory:
	  /usr/lib/uucp

DESCRIPTION

       All the scripts can be run from the command line or can be run automatically by the cron daemon. To automatically run the  scripts,  remove
       the comment character (#) from the beginning of the relevant line in the /var/spool/cron/crontabs/uucp file.

       This  script  reports  status  to  the system administrator. It issues the uustat command to find out the status of uucp jobs. It mails the
       results to the uucp login ID. The script may be modified to send mail to any login ID such as the uucp administrative login ID  (uucpa)	or
       root.  This script cleans up the /var/spool/uucp and /var/spool/uucppublic directories by running the uucleanup command. The uucleanup com-
       mand is run with the following parameters: -C7, -D7, X2, -o2, -W1.  This script runs the uusched and uuxqt daemons in the background.  This
       script  polls  the  systems  listed  in	the  /usr/lib/uucp/Poll file.  The uudemon.poll script should be scheduled before the uudemon.hour
       script. This allows uudemon.poll to create any command files before cron runs the uudemon.hour script.

FILES

       Contains the uudemon.admin, uudemon.cleanu, uudemon.hour and uudemon.poll files.  Contains the uucp file.

RELATED INFORMATION

       Commands: cron(8), uucleanup(8), uusched(8), uuxqt(1)

       Files: /usr/lib/uucp delim off

																	uudemon(4)
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