SUMMARY: how to capture PID at execution time

From: Dan's generic account (ocalld_at_eads.com)
Date: 03/30/05

  • Next message: joe biggs: "Script for Printer" 
    To: "Sunmanagers LIST" <sunmanagers@sunmanagers.org>
Date: Wed, 30 Mar 2005 19:58:48 +0100

    Thanks to all those that replied.

    The answer is:

    $! returns pid of last background process
    $$ returns current process pid.

    The "gotcha" i had was that my script executes more scripts to run the httpd.
    I couldn't capture the pid of commands in sub-scripts.

    I found that by obtaining the pid of the master script when started
    "echo $$ > /var/run/master.script.pid" (declared at begging of script)
    i could use this group pid to kill all processes started by the main script with:
    pkill -g `cat /var/run/master.script.pid`

    Thanks
    Dan.

    On Tue, 2005-03-29 at 20:24, Dan's generic account wrote:
    > Hi all
    >
    >
    > Is it possible to capture the PID of a command at the time of execution and
    > write it to a log file???
    >
    > I need to capture the PID at the time of execution, as several instances of
    > the command will be run at the same time, i need to make sure that the correct
    > process is killed when required.
    >
    > an example would be having several instances httpd running.
    >
    > running the httpd startup script produces the following output:
    > ./scripts/httpd.sh 2>&1 |tee /var/log/jini.httpd.log &
    > [1] 1199
    > bash-2.03# Mar 29, 2005 8:28:05 PM com.sun.jini.tool.ClassServer run
    > INFO: ClassServer started [lib/dl/, port 8082]
    >
    >
    >
    >
    > the 1199 is the group process, so i could just use "kill -- -1199". any child
    > process die.
    > The above pipe to tee does not report the group PID. i just get the
    > following:
    >
    > bash-2.03# cat /var/log/jini.httpd.log
    > Mar 29, 2005 8:28:05 PM com.sun.jini.tool.ClassServer run
    > INFO: ClassServer started [lib/dl/, port 8082]
    >
    > how can i trap the PID?
    >
    > Thanks
    > Dan.
    >
    >
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