Re: What does the script do

From: Lew Pitcher (lpitcher_at_sympatico.ca)
Date: 08/19/05 

Date: Thu, 18 Aug 2005 20:17:35 -0400

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sheldon.robinson@gmail.com wrote:
> Will it execute the lines following the if.. clause or the then..
> clause?

Yes.

>
> if [ $LINE_COUNT -lt 1 ]
> cd ${BATCH10_DIR}/data/outgoing/file43
> mv bqt_sspmog_file43* ${BATCH10_DIR}/data/processed/
> cd ${BATCH10_DIR}
> then
> . ${BATCH10_DIR}/sendmail.sh $TO_MAILID "BQT-SSP File43 FTPed
> successfully" $LOG_FILE
> fi

In general, the [ba]sh 'if' statement is stuctured as

    if <list of statements>
    then <list of statements>
  [ else <list of statements> ]
    fi
with some variations for an else-if component

Your example if statement falls into the general format quite nicely

The first part
  if [ $LINE_COUNT -lt 1 ]
     cd ${BATCH10_DIR}/data/outgoing/file43
     mv bqt_sspmog_file43* ${BATCH10_DIR}/data/processed/
     cd ${BATCH10_DIR}

matches to
  if <list of statements>

The next part
   then
     . ${BATCH10_DIR}/sendmail.sh $TO_MAILID \
       "BQT-SSP File43 FTPed successfully" $LOG_FILE
matches to
   then <list of statements>

And, of course, the final part
   fi

matches to
   fi

So, if the exit status of the list of commands
     [ $LINE_COUNT -lt 1 ]
     cd ${BATCH10_DIR}/data/outgoing/file43
     mv bqt_sspmog_file43* ${BATCH10_DIR}/data/processed/
     cd ${BATCH10_DIR}
is 0, then
     . ${BATCH10_DIR}/sendmail.sh $TO_MAILID \
       "BQT-SSP File43 FTPed successfully" $LOG_FILE
will be executed

- --
Lew Pitcher

Master Codewright & JOAT-in-training | GPG public key available on request
Registered Linux User #112576 (http://counter.li.org/)
Slackware - Because I know what I'm doing.
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