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Full Discussion: syntax for IF test or AWK for octal
Top Forums Shell Programming and Scripting syntax for IF test or AWK for octal Post 302604070 by sboxtops on Friday 2nd of March 2012 09:57:09 PM
Old 03-02-2012
syntax for IF test or AWK for octal
Using korn shell. I am reading a file line by line. If a record has a carriage return (octal 015) then I append the second record to the first record. Not all records have a carriage return. I have the unix shell script working with grep, but when my file has +100,000 records it runs slow. I would like to see if the shell script would run faster with an IF Test or AWK. I can't get the syntax right for the IF test. I don't know AWK, if you think this would run faster I would appreciate know how to code it.


1) I was doing some time testing to see where my shell script was slow. This runs fast.
Code:
#!/bin/ksh
file_in=file.txt
file_out=file.txt_out
cnt_in=0
while read LINE
do
   cnt_in=$(( cnt_in + 1 ))
   echo $LINE >> $file_out
done < $file_in

2) This runs slow
#!/bin/ksh
dir1=/tdcexports/db2/stage
file_in=file.txt
file_out=file.txt_out
cnt_in=0
while read LINE
do
   cnt_in=$(( cnt_in + 1 ))
   ck_carriage=`echo $LINE | grep -c ^M`
   echo $LINE >> $file_out
done < $file_in


3) I've tried various IF but didn't find the right syntax yet. This doesn't work properly:
Code:
if [ $LINE  = '\015' ]
     then echo equal
     else echo no equal
   fi


Thank you for your help.
Last edited by radoulov; 03-03-2012 at 03:11 AM.. Reason: Code tags!
 

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LEARN ABOUT CENTOS

tcfmgr

TCFMGR(1)							   Tokyo Cabinet							 TCFMGR(1)

NAME

       tcfmgr - the command line utility of the fixed-length database API

DESCRIPTION

       The  command `tcfmgr' is a utility for test and debugging of the fixed-length database API and its applications.  `path' specifies the path
       of a database file.  `width' specifies the width of the value of each record.  `limsiz' specifies the limit  size  of  the  database  file.
       `key' specifies the key of a record.  `value' specifies the value of a record.  `file' specifies the input file.

	      tcfmgr create path [width [limsiz]]
		     Create a database file.
	      tcfmgr inform [-nl|-nb] path
		     Print miscellaneous information to the standard output.
	      tcfmgr put [-nl|-nb] [-sx] [-dk|-dc|-dai|-dad] path key value
		     Store a record.
	      tcfmgr out [-nl|-nb] [-sx] path key
		     Remove a record.
	      tcfmgr get [-nl|-nb] [-sx] [-px] [-pz] path key
		     Print the value of a record.
	      tcfmgr list [-nl|-nb] [-m num] [-pv] [-px] [-rb lkey ukey] [-ri str] path
		     Print keys of all records, separated by line feeds.
	      tcfmgr optimize [-nl|-nb] path [width [limsiz]]
		     Optimize a database file.
	      tcfmgr importtsv [-nl|-nb] [-sc] path [file]
		     Store records of TSV in each line of a file.
	      tcfmgr version
		     Print the version information of Tokyo Cabinet.

       Options feature the following.

	      -nl : enable the option `FDBNOLCK'.
	      -nb : enable the option `FDBLCKNB'.
	      -sx : the input data is evaluated as a hexadecimal data string.
	      -dk : use the function `tcfdbputkeep' instead of `tcfdbput'.
	      -dc : use the function `tcfdbputcat' instead of `tcfdbput'.
	      -dai : use the function `tcfdbaddint' instead of `tcfdbput'.
	      -dad : use the function `tcfdbadddouble' instead of `tcfdbput'.
	      -px : the output data is converted into a hexadecimal data string.
	      -pz : do not append line feed at the end of the output.
	      -m num : specify the maximum number of the output.
	      -pv : print values of records also.
	      -rb lkey ukey : specify the range of keys.
	      -ri str : specify the interval notation of keys.
	      -sc : normalize keys as lower cases.

       This command returns 0 on success, another on failure.

SEE ALSO

       tcftest(1), tcfmttest(1), tcfdb(3), tokyocabinet(3)

Man Page							    2012-08-18								 TCFMGR(1)
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