How can i use function for the below script to shorten it? Post: 302881095

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Top Forums UNIX for Dummies Questions & Answers How can i use function for the below script to shorten it? Post 302881095 by vikatakavi on Thursday 26th of December 2013 02:01:39 PM

12-26-2013

Registered User

How can i use function for the below script to shorten it?

Hi All,

i worte a shell script which will zcat the .gz file and write it in to a tmp file and then again cat the file and convert it to Dos mode. Next step is i am greping the file to search for the particular string on the 1st line and if the string does not exits it will insert the 1st line .This is done on 6 different files with different headers inserting at the 1st line.

HTML Code:

zcat 2013-12-26_file1.csv.gz > 2013-12-26_file1_tmp.csv
cat 2013-12-26_file1_tmp.csv | sed 's/$/\r/' > 2013-12-26_file1.csv
grep -q "TIMESTAMP" 2013-12-26_file1.csv
if [ $? -eq 0 ]
then
echo "NO CHANGES ARE NEEDED"
exit
else
sed -i '1iTIMESTAMP|id|Fisrtname' 2013-12-26_file1.csv
echo "ADDED HEADER"
fi
 

zcat 2013-12-26_file2.csv.gz > 2013-12-26_file2_tmp.csv
cat $2013-12-26_file2.tmp.csv | sed 's/$/\r/' > 2013-12-26_file2.csv
grep -q  "ADDRESS" 2013-12-26_file2.csv
if [ $? -eq 0 ]
then
echo "NO CHANGES ARE NEEDED"
else
sed -i '1iADDRESS|ID|NAME' 2013-1-26_file2.csv
echo "ADDED HEADER"
else
fi

I thought of doing this for all the 6 files but it will be same script repeating again and again . so Can some one point me how i can reduce the code using function with small example

Thank you!!

vikatakavi

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LEARN ABOUT OPENSOLARIS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a    Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.11							    30 Jan 2004 							 script(1)