set echo off and on Post: 302694055

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Top Forums UNIX for Dummies Questions & Answers set echo off and on Post 302694055 by avinthm on Thursday 30th of August 2012 06:02:56 AM

08-30-2012

Registered User

set echo off and on

Hi
I have written a bash script to capture the output of jmap.
The command i execute is jmap -heap <pid>
This gives details of memory usage of the process with <pid>.
Now jmap not only gives this info but also prints couple more lines, which i am not interested in. Here are the lines that I am not able to capture and I dont want these lines to be echoed

HTML Code:

Attaching to process ID 20850, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 17.1-b03

I tried to set echo off before executing jmap and set echo on after this statement, but of no use.

set echo off works fine, but it does not turn on later.
Please suggest.

Here is my script

HTML Code:

#!/bin/bash

psdetails=$(ps -ef | grep "$1" | grep -v "grep" | grep -v "heapDataExtractor")
# Get the pid
pid=$(echo $psdetails | awk '{split($0, a," "); print a[2] }')

set echo off

$JAVA_HOME/bin/jmap -heap $pid  > jmapRawData.txt

let headerCount=0

set echo on

while read line
do
#do some processing and echo the output
done < jmapRawData.txt

avinthm

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LEARN ABOUT DEBIAN

evtest-capture

EVTEST-CAPTURE(1)														 EVTEST-CAPTURE(1)

NAME

       evtest-capture - Input device event capture program

SYNOPSIS

       evtest-capture "/dev/input/eventX" [evtest-capture.xml]

DESCRIPTION

       evtest-capture captures the information and events from the input device specified on the command line and writes it to the xml file given.
       If no filename is given for the output file, evtest-capture.xml is chosen as default.

       evtest-capture needs to be able to read from the device; in most cases this means it must be run as root.

       Together with with evtest-create-device.xsl, a simple uinput-based software input device can be created that replays the events as if the
       same input was performed on the physical device. This can be useful to replicate bugs with input devices in upper layers of the stack.

       To convert evtest-capture.xml into such a uinput device, run:

	   xsltproc evtest-create-device.xls evtest-capture.xml > mydevice.c
	   gcc -o mydevice mydevice.c
	   ./mydevice

DIAGNOSTICS

       If evtest-capture does not see any events even though the device is being used, the device may be grabbed by a process (EVIOCGRAB). This is
       usually the case when debugging a synaptics device from within X. VT switching to a TTY or shutting down the X server terminates this grab
       and synaptics devices can be debugged.

SEE ALSO

       evtest(1)

AUTHOR

       evtest-capture was written by Peter Hutterer <peter.hutterer@redhat.com[1]>.

NOTES

	1. peter.hutterer@redhat.com
	   mailto:peter.hutterer@redhat.com

								    05/21/2012							 EVTEST-CAPTURE(1)