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Full Discussion: correct use of "ps -ef | grep "?
Top Forums UNIX for Dummies Questions & Answers correct use of "ps -ef | grep "? Post 7938 by mulligm on Wednesday 3rd of October 2001 06:02:30 PM
Old 10-03-2001
correct use of "ps -ef | grep "?
I am trying to run a program which checks to see if a process is running. If the process is not running, I want to start (re-start) the process. If the process is still (already) running, do nothing.

Here is the process; it starts manually:
$java Validation


here is my code to see if it is still running:
logfile1=/usr/test/file1.log
logfile2=/usr/test/file2.log

if ( ps -ef | grep Validation )
then
date>>$logfile1
echo val program already running>>$logfile1
else
date>$logfile2
echo val program needs restarting>>$logfile2
/usr/test/java Validation>>$logfile2
fi


PROBLEM:
When the Validation program stops (I stopped it manually), and the above code runs, it still thinks the process is running.
When I type "ps -ef | grep Validation" at the command line, it returns:
grep Validation

This is nothing more than the command I just entered. I guess this is why the above code still thinks my java program is running, but it is not.

When I execute "ps -ef | grep Validation" from the command line when the Validation program is running, I get:
/usr/test/java Validation
grep Validation

Why I am getting "grep Validation" returned?
How can I stop from getting "grep Validation" returned?

Thank you so much!
 

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LEARN ABOUT DEBIAN

msva-query-agent

MSVA-QUERY-AGENT(1)					User Contributed Perl Documentation				       MSVA-QUERY-AGENT(1)

NAME

       msva-query-agent - query a Monkeysphere Validation Agent

SYNOPSIS

       msva-query-agent CONTEXT PEER PKC_TYPE [PEER_TYPE] < /path/to/public_key_carrier

ABSTRACT

       msva-query-agent validates certificates for a given use by querying a running Monkeysphere Validation Agent.

USAGE

       msva-query-agent reads a certificate from standard input, and posts it to the running Monkeysphere Validation Agent.  The return code
       indicates the validity (as determined by the agent) of the certificate for the specified purpose.  The agent's return message (if any) is
       emitted on stdout.

       The first three command-line arguments are all required, supplied in order, as follows:

       CONTEXT
	   Context in which the certificate is being validated (e.g. 'https', 'ssh', 'ike')

       PEER
	   The name of the intended peer.  When validating a certificate for a service, supply the host's full DNS name (e.g.  'foo.example.net')

       PKC_TYPE
	   The format of public key carrier data provided on standard input (e.g. 'x509der', 'x509pem', 'opensshpubkey', 'rfc4716')

       The fourth argument is optional:

       PEER_TYPE
	   The type of peer we are inquiring about (e.g. 'client', 'server')

RETURN CODE

       If the certificate is valid for the requested peer in the given context, the return code is 0.  Otherwise, the return code is 1.

ENVIRONMENT VARIABLES

       msva-query-agent's behavior is controlled by environment variables:

       MONKEYSPHERE_VALIDATION_AGENT_SOCKET
	   Socket over which to query the validation agent.  If unset, the default value is 'http://127.0.0.1:8901'.

       MSVA_LOG_LEVEL
	   Log messages about its operation to stderr.	MSVA_LOG_LEVEL controls its verbosity, and should be one of (in increasing verbosity):
	   silent, quiet, fatal, error, info, verbose, debug, debug1, debug2, debug3.  Default is 'error'.

COMMUNICATION PROTOCOL DETAILS

       Communications with the Monkeysphere Validation Agent are in the form of JSON requests over plain HTTP.	Responses from the agent are also
       JSON objects.  For details on the structure of the requests and responses, please see
       http://web.monkeysphere.info/validation-agent/protocol

SEE ALSO

       msva-perl(1), monkeysphere(1), monkeysphere(7)

BUGS AND FEEDBACK

       Bugs or feature requests for msva-perl and associated tools should be filed with the Monkeysphere project's bug tracker at
       https://labs.riseup.net/code/projects/monkeysphere/issues/

AUTHORS AND CONTRIBUTORS

       Jameson Graef Rollins <jrollins@finestructure.net<gt> Daniel Kahn Gillmor <dkg@fifthhorseman.net<gt>

       The Monkeysphere Team http://web.monkeysphere.info/

COPYRIGHT AND LICENSE

       Copyright AX 2010, Jameson Graef Rollins and others from the Monkeysphere team.	msva-query-agent is free software, distributed under the
       GNU Public License, version 3 or later.

perl v5.14.2							    2013-04-05						       MSVA-QUERY-AGENT(1)
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