Trapping a kill command sent to a script and using it to send an EOF to a subprocess before killing
I originally had a script written in pure shell that I used to parse logs in real time and create a pipe delimited file that only contained errors. It worked but it was using a lot of memory (still not clear on why). I originally got around this by writing a wrapper for the script that ran on cron and periodically killed the script and started a new instance. This worked for a while, but was still too heavy. So, I rewrote the parsing logic in awk instead of shell and the memory and CPU utilization dropped completely.
So now, I have this script running, but every 15 minutes the cronjob kills it and starts a new instance. What I want to do now is have my awk section of the script building out arrays, and when the cron kicks in, it sends an EOF to the awk so it can dump it's info into a separate file before it's killed and a new instance is started. Below is my code. What I want to do is add blocks to the awk section that creates arrays, and then add an end block to it that dumps the values from those arrays into a file. So, I need to trap the kill command and then have it send an EOF to awk, then kill the script and start a new instance.
Hi All,
Whoever types rm in the command prompt I need to trap the username, the ip address,timestamp and the rm filename(which file they are removing) and write it to the log file. could anyone help me?.
Advanced thanks
Suma (1 Reply)
I am writing a shell script that executes another script by fetching it over the network and piping its contents into sh (ftp -o - $script | sh; or wget -O - |sh). Since this bypasses putting the script on the filesystem, this means I can't source the script directly (using . ), but rather it... (1 Reply)
Dear Freinds,
Help needed in input redirection .
My problem is as follows..
I have a shell script as follows which calls another gnuplot script .
datagen.sh
#!/bin/ksh
gnuplot plot_I.plt
In the above file I am calling another file called plot_I.plt which reside in the same... (4 Replies)
Hi all,
I am using top command in my script to redirect output to temp file. I used kill -9 `ps -ef|grep top|grep -v grep|awk '{print $2}'` to kill top command in my script, but it is not working? Can you please tell how to kill top command in my script? (4 Replies)
Hi I have written a script which works well .. It's divided into a series of jobs one running after another
But on pressing the enter key the whole script goes haywire .. I want a way to trap this enter command and echo it as invalid input ..
Any suggestions highly appreciated...
Thanks :) (2 Replies)
I would appreciate any help.
I need to run 'ps -ef | grep 'process', get the process id and kill that process.
I have got this far:
- Get pid using ps -ef | awk '/process/{ print $2}'
after this I'm kind of stuck..
- Use pipe to redirect the output to kill
pid=ps -ef | awk '/bmserver/{... (2 Replies)
All,
I am trying to build a script in perl that will alllow me to pass the IP address to a ping command and redirect the output to a file and then kill that process after a certain period of time.
let's say, I call my script ping.pl, I would like to be able to run it like this for example :... (7 Replies)
Hi All,I have a problem with my kill idle script.my script is supposed to kill the user sessions which are idle for more than 2 hours.But is is killing the sessions which are idle for less than 2 hrs also.I dont know the exact time after which the script is killing,but it is less than 2 hours i am... (3 Replies)
i have one script which uses “kill -9” command. That prevents from getting the process core dumps. Apparently once tomcat lands in a confused state, we seem to have no other option, other than Kill -9.
is there any other way to get rid of this.
Script:
sleep 2
PID=`ps -ef | grep "^tomcat... (3 Replies)
Discussion started by: Amrutayan09
3 Replies
LEARN ABOUT DEBIAN
dpkg-www
DPKG-WWW(1) General Commands Manual DPKG-WWW(1)NAME
dpkg-www - program to remotely open a WWW Debian package browser
SYNOPSIS
dpkg-www [-s|--stdout] [-h|--host host] [query]
DESCRIPTION
dpkg-www is used to remotely control a WEB browser and open a dpkg URL on the local host from an interactive shell or script.
If the command is invoked while running under X-window the script will try to find an installed X browser to open the specified URL. If
not running under X it will try to use a text browser instead.
If Netscape is found and a Netscape instance is already running it will be asked to open the dpkg URL on localhost with the optional query
supplied on the command line. If there is no browser running, it will start automatically a new one.
The functionality provided by this program is identical to running a web browser with the -remote openURL(http://localhost/cgi-bin/dpkg)
argument or opening the same URL from within the browser.
dpkg-www-installer is an helper application which can configured in the WWW browser for web installation. It should never be invoked
directly by the user.
OPTIONS -s, --stdout
Redirect output to stdout. Requires one of the text browsers (lynx, lynx-ssl or links) installed.
-h, --host host
Send the query to a remote host, where dpkg-www must be installed.
query Specifies an optional package name, an absolute pathname or a query argument which is passed to the dpkg cgi-bin. See dpkg-www(8)
for more information about the use of the cgi.
FILES
/etc/dpkg-www.conf
~/.dpkg-www
Configuration files for dpkg-www. It is not necessary for these files to exist, there are sensible defaults for everything, but you
can specify your preferred www browser with the DPKG_WWW_BROWSER variable, for example: DPKG_WWW_BROWSER=mozilla
EXAMPLES
dpkg-www
This would open a dpkg URL on localhost listing all the installed packages.
dpkg-www bash
This would open a dpkg URL asking info on the bash package.
dpkg-www -h pisolo bash
This would open a dpkg URL asking info on the bash package on host pisolo.
dpkg-www 'dpkg*'
This would open a dpkg URL listing all packages matching dpkg*.
dpkg-www /bin/bash
This would open a dpkg URL asking info on the package(s) owning the file /bin/bash .
dpkg-www depends=svgalib
This would open a dpkg URL listing all packages depending on svgalib.
dpkg-www --stdout depends=awk | grep ^ii
This would list on stdout all packages depending on awk and grep all lines of installed packages.
SEE ALSO dpkg(8), dpkg-www(8)AUTHOR
Massimo Dal Zotto <dz@debian.org>.
Bugs should be reported via the normal Debian bug reporting system.
LICENCE
dpkg-www is licensed under the GNU General Public License version 2.
September 1, 2004 DPKG-WWW(1)