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Full Discussion: Using GREP in IF Statement
Top Forums Shell Programming and Scripting Using GREP in IF Statement Post 302815391 by Ariean on Friday 31st of May 2013 04:07:08 PM
Old 05-31-2013
Quote:
Originally Posted by MadeInGermany
-a and -z work inside the test command. -a is logical AND.
Here you need &&, the shell's logical AND.
Do not use `command in backticks`! It runs the command output in a subshell!
No harm *here* because grep -q suppresses the output. But generally confusing and risky.
Last but not least, it is recommended to "quote" variables in command arguments.
Not required *here* because you set them to sane values.
Code:
echo $UNINUM
[ ! -z ${UNINUM} ]

do odd things if UNINUM has a * or a space character.
Code:
echo "$UNINUM"
[ ! -z "$UNINUM" ]

are safe.

Your comments raised few doubts in my code, can you please guide me here

1) I am always using the flower brackets for all variables in my shell script like ${VAR}, is that a wrong approach? one issue i just learned is without double quotes the newlines are lost to word split, are there any other drawbacks before i go ahead and replace everywhere in my scripts?

2) I have the following piece code which i am executing via shell script, i am not suppose to use the backticks since it opens up and executes the code in a new sub shell? this works fine for me and serves the purpose

Code:
#### SECOND UPDATE OF VALIDATION STATUS IN FEED_PROCESS_LOG TABLE ####

        logit "Updating the Validation Status Field in ${DBSTGUSER}.FEED_PROCESS_LOG Table as COMPLETED With Matching Parameters"
        logit "UNINUM :: ${UNINUM} PROVIDER :: ${PROVIDER} EXTRACT_DT :: ${EXTRACT_DT} VER_NUM :: ${VER_NUM}"

        `${ORACLE_HOME}/bin/sqlplus ${DBSTGUSER}/${DBSTGPASS}@${DBSRC} <<EOF >> ${UPD_FEED_PROC_LOG}
        spool ${UPD_SQL2}
        UPDATE ${DBSTGUSER}.FEED_PROCESS_LOG SET VALIDATION_STATUS='COMPLETED'
        WHERE UNINUM='${UNINUM}' and PROVIDER='${PROVIDER}' and EXTRACT_DT='${EXTRACT_DT}'
        and VER_NUM=${VER_NUM} and ACT_END_DT IS NULL  AND VALIDATION_STATUS='RUNNING';
        spool off;
        COMMIT;
        EXIT;
        EOF`

        if grep -q "ERROR" ${UPD_FEED_PROC_LOG}
        then
                logit "${DBSTGUSER}.FCA_HASH_TOTALS_PKG.HASH_TOTALS_COMPUTE Procedure Failed"
                logit "Please Check ${UPD_FEED_PROC_LOG} Log File For Detailed Information"

                exit 11
        else
                logit "${DBSTGUSER}.FCA_HASH_TOTALS_PKG.HASH_TOTALS_COMPUTE Procedure Completed Successfully"
                logit "Please Check ${UPD_FEED_PROC_LOG} Log File For Detailed Information"
        fi

Thank you.
 

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LEARN ABOUT MOJAVE

ppi::statement::data5.18

PPI::Statement::Data(3) 				User Contributed Perl Documentation				   PPI::Statement::Data(3)

NAME

       PPI::Statement::Data - The __DATA__ section of a file

SYNOPSIS

	 # Normal content

	 __DATA__
	 This: data
	 is: part
	 of: the
	 PPI::Statement::Data: object

INHERITANCE

	 PPI::Statement::Compound
	 isa PPI::Statement
	     isa PPI::Node
		 isa PPI::Element

DESCRIPTION

       "PPI::Statement::Data" is a utility class designed to hold content in the __DATA__ section of a file. It provides a single statement to
       hold all of the data.

METHODS

       "PPI::Statement::Data" has no additional methods beyond the default ones provided by PPI::Statement, PPI::Node and PPI::Element.

       However, it is expected to gain methods for accessing the data directly, (as a filehandle for example) just as you would access the data in
       the Perl code itself.

TO DO

       - Add the methods to read in the data

       - Add some proper unit testing

SUPPORT

       See the support section in the main module.

AUTHOR

       Adam Kennedy <adamk@cpan.org>

COPYRIGHT

       Copyright 2001 - 2011 Adam Kennedy.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

       The full text of the license can be found in the LICENSE file included with this module.

perl v5.18.2							    2011-02-25						   PPI::Statement::Data(3)
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