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Full Discussion: Issue with while loop?
Top Forums Shell Programming and Scripting Issue with while loop? Post 302965458 by svajhala on Friday 29th of January 2016 10:07:14 AM
Old 01-29-2016
Issue with while loop?
Hi,

I have prepared a script to search for backup file information on the Linux server. Script works fine for the most part except the echo statement inside an IF conditional block displays the message ''snapshot directory not found on xxxxx" even though the .snapshot directory is found a specified path. Here is the code.

Code:
#!/bin/bash
fdate=`date "+%Y-%m-%d"`
#set -x
df -h | grep sbl| awk '{print $5}' > /home/greg/fs.out
if [ ! -s /home/greg/fs.out ]
then
 echo "No netapp filesystems found"
 exit 1
else
 echo "netapp filesystems found. continuing to the next step"
while read line
do
echo $line
if [ ! -d "${line}"/.snapshot ]
then
echo "snapshot directory not found on "$line""
else
  cd ${line}/.snapshot
  latest_bkp=`ls -l |grep -v snapmirror | tail -1|awk '{print $9}'`
  bkp_fldr_timestamp=`echo "$latest_bkp"|cut -f3 -d .|cut -f1 -d _`
        if [ ${fdate} != ${bkp_fldr_timestamp} ]
        then
                echo "Today's backup is missing for $line on `hostname`"
        else
                echo "File system backup has been taken for $line on `hostname`"
        fi
fi
done <  /home/greg/fs.out
fi
rm /home/greg/fs.out
exit 0

Here's the output when I execute the script.

Code:
[greg@sbldev01 ~]$ ./fs_bkpchk.sh
netapp filesystems found. continuing to the next step

snapshot directory not found on
/sblmnt/sb_devm2_sbl_01
File system backup has been taken for sblmnt/sb_devm2_sbl_01 on sbldev01

snapshot directory not found on
/sblmnt/sb_devm2_sbl_02
File system backup has been taken for /sblmnt/sb_devm2_sbl_02 on sbldev01

snapshot directory not found on
/sblmnt/sb_devm2_sbl_03
File system backup has been taken for /sblmnt/sb_devm2_sbl_03 on sbldev01

Any pointers will be appreciated.

Thanks,
Greg
 

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LEARN ABOUT CENTOS

execute

EXECUTE(7)						  PostgreSQL 9.2.7 Documentation						EXECUTE(7)

NAME

       EXECUTE - execute a prepared statement

SYNOPSIS

       EXECUTE name [ ( parameter [, ...] ) ]

DESCRIPTION

       EXECUTE is used to execute a previously prepared statement. Since prepared statements only exist for the duration of a session, the
       prepared statement must have been created by a PREPARE statement executed earlier in the current session.

       If the PREPARE statement that created the statement specified some parameters, a compatible set of parameters must be passed to the EXECUTE
       statement, or else an error is raised. Note that (unlike functions) prepared statements are not overloaded based on the type or number of
       their parameters; the name of a prepared statement must be unique within a database session.

       For more information on the creation and usage of prepared statements, see PREPARE(7).

PARAMETERS

       name
	   The name of the prepared statement to execute.

       parameter
	   The actual value of a parameter to the prepared statement. This must be an expression yielding a value that is compatible with the data
	   type of this parameter, as was determined when the prepared statement was created.

OUTPUTS

       The command tag returned by EXECUTE is that of the prepared statement, and not EXECUTE.

EXAMPLES

       Examples are given in the EXAMPLES section of the PREPARE(7) documentation.

COMPATIBILITY

       The SQL standard includes an EXECUTE statement, but it is only for use in embedded SQL. This version of the EXECUTE statement also uses a
       somewhat different syntax.

SEE ALSO

       DEALLOCATE(7), PREPARE(7)

PostgreSQL 9.2.7						    2014-02-17								EXECUTE(7)
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