Adding a new line after a specific line with sed

UNIX for Beginners Q & A
1

Hi All,

My requirement is to add a specific line in a file after a certain line that contains 'setenv'

the existing code is like

setenv SEQFILES "/ConvWrk/inteng03/alltars/bnymais1"

LIBDEF scope='JOB' type='PGM' dataset='SUNAR.PJ90000P.JOBLIB' lib='/invest1/io09100/bnymport:/invest1/io09100/mbm:/bnymasia/invest1:'

I am using

sed 's!.*setenv.*!&/\nsetenv PRICESEQ "/invest1/iomaint/seqfiles/SHARED.CARDLIB"!' T3 > ${ORIG_JOB}_S

i am expecting the code to be

setenv SEQFILES "/ConvWrk/inteng03/alltars/bnymais1"
setenv PRICESEQ "/invest1/iomaint/seqfiles/SHARED.CARDLIB"

LIBDEF scope='JOB' type='PGM' dataset='SUNAR.PJ90000P.JOBLIB' lib='/invest1/io09100/bnymport:/invest1/io09100/mbm:/bnymasia/invest1:'

however its not taking the next line
its getting appended in the same line itself.

my output :


setenv SEQFILES "/ConvWrk/inteng03/alltars/bnymus1"/nsetenv PRICESEQ "/invest1/iomaint/seqfiles/SHARED.CARDLIB"

LIBDEF scope='JOB' type='PGM' dataset='SUNAR.PJ90000P.JOBLIB' lib='/invest1/io09100/bnymport:/invest1/io09100/mbm:/bnymasia/invest1:'

i know i am commiting a silly mistake.. Kindly rectify.

2

Hello gotamp,

Could you please try following and let me know if this helps you.

awk -vLINE="setenv PRICESEQ \"/invest1/iomaint/seqfiles/SHARED.CARDLIB\"" '/^setenv SEQFILES/{print $0 ORS LINE;next} 1'  Input_file

Output will be as follows.

setenv SEQFILES "/ConvWrk/inteng03/alltars/bnymais1"
setenv PRICESEQ "/invest1/iomaint/seqfiles/SHARED.CARDLIB"
 
LIBDEF scope='JOB' type='PGM' dataset='SUNAR.PJ90000P.JOBLIB' lib='/invest1/io09100/bnymport:/invest1/io09100/mbm:/bnymasia/invest1:'

Thanks,
R. Singh

1 Like
3

Yes Ravinder. It works.

Problem stands resolved.
But just to satisfy my mind and soul if you could suggest with sed please !!

4

Hello gotamp,

Yes, mind and soul's satisfaction is very much important. So here is a sed solution which may help you. Also I tested this in GNU sed only.

sed  '/setenv SEQFILES \"\/ConvWrk\/inteng03\/alltars\/bnymais1\"/ a setenv PRICESEQ \"/invest1/iomaint/seqfiles/SHARED.CARDLIB\""'   Input_file

Output will be as follows.

setenv SEQFILES "/ConvWrk/inteng03/alltars/bnymais1"
setenv PRICESEQ "/invest1/iomaint/seqfiles/SHARED.CARDLIB""
  
LIBDEF scope='JOB' type='PGM' dataset='SUNAR.PJ90000P.JOBLIB' lib='/invest1/io09100/bnymport:/invest1/io09100/mbm:/bnymasia/invest1:'

Thanks,
R. Singh

5

The sed in post#1 works for me. Might be a sed version incompatibiity, or, you are on a system that doesn't have \n as the line terminator.

6

Unix sed needs a backslash-newline in the sed code. It can be done with the s command, but the a command is more elegant

sed '\!setenv! a\
setenv PRICESEQ "/invest1/iomaint/seqfiles/SHARED.CARDLIB"' T3 > ${ORIG_JOB}_S