Shell Programming and Scripting

Hi,

This thread is an extension of the post I posted in another folder for Unix Dummies.

I am actually trying to read all the files in a folder, let say folder A.

There are alot of .txt files in this folder where I have sed them and translate to numeric elements.

For example:-
I have 0,0,0,0,0,0,0,0,0,.......

Firstly, I have problem where I would like to insert a string "test" for the last element of each file read; lets say:-

0,0,0,0,0,0,0...........,test

Second, I would like to insert a newline character before next file is read similarly.

Please advise. Thanks.


-Jason

I am not sure about your requirment..But
I hope END in gawk/nawk script will do your first requirment ..

user_prady

Code:

awk 'FNR == 1 && NR > FNR { print "" } { print $0 ",test" }' *.txt

How about this for recursively modifying files..

Code:

for temp in `find ./A -name  "*.txt"`
do
        gawk -v file=$temp '
              END{printf "test" >>  file}
        ' $temp
done

Hi reborg,

Thanks for the input. I tried to simulate them when I have a file described.

Could you explain to me what these does ; I understand that
FNR stands for current record number in filename which is 1
However, i do not understood why NR>FNR . Is that for inserting a new line which is {print ""} ?

awk 'FNR == 1 && NR > FNR { print "" } { print $0 ",test" }' *.txt

Actually, my file structure is originally not from the format of 0,0,0,0,1,0,0.

Rather, I have a C file where I extract the first field of all the files
and arranged into the above mentioned format. Below is the code from my original file to the above mentioned format.

cat b*.txt| sed 's/^[ ]*//' |sed 's/^-/0/'|sed 's/^#####/0/'|sed '/^[^0-9-]/d'|tr ':' "," |awk ' {

printf ("%s",$1);

}'>> output.txt

I tried to apply the code that you pointed to me in this scenario but it doesnt allow to work.

Please advise. Appreciate alot. Thanks.

-Jason

Hi,

from the above code,

I tried something like this:-

cat b*.txt| sed 's/^[ ]*//' |sed 's/^-/0/'|sed 's/^#####/0/'|sed '/^[^0-9-]/d'|tr ':' "," |awk '{printf ("%s",$1);}'| awk 'FNR == 1 && NR > FNR { print "" } { print $0 ",test" }' >>output.txt

However, given I have two files, the "string" of "test" is only appended at the end of reading these files. Any idea how to break the file apart to that new line and "test" can be inserted?Thanks.

-Jason