Shell Programming and Scripting

Hi All,

Need help in resoving the issue . Can anyone let me know how to get fix length using unix shellscript.

For Ex: echo "NUMBER OF RECORDS "${NO_OF_ROWS}"\nFILE CREATION DATE&TIME "${PROD_DT}"

output should be :

NUMBER OF RECORDS 2546
CREATIN DATE&TIME 2009-12-01

Each record created in Unix should be of 80 byte length

Kindly help me out on the same

Take the spurious quotes out of the middle of the echo, and put the second line of output in a second echo. That should produce the output you need.

You'll need to clarify what you mean by "Each record created in Unix should be of 80 byte length" as nothing in your question implies you are creating anything at all...

The script will be easier to read as two commands:

Code:

echo "NUMBER OF RECORDS ${NO_OF_ROWS}"
echo "FILE CREATION DATE&TIME ${PROD_DT}"

I too don't understand "Each record created in Unix should be of 80 byte length".

Are you trying to create text files in which each line has exactly 80 characters?

The echo command seems to automatically strip off leading and trailing whitespace, which thwarts you. But this should work:

Code:

IFS= echo "Whatever ...                            " > outfile

The IFS variable is very special. The echo command consults it before interpreting whitespace. I've made it blank in the above example.


If you are counting lines in a file, use the wc command.

Code:

wc -l file

Or if you still want to use echo, use -e to enable interpretation of backslash escape sequences.

Code:

$ echo -e "first line\nsecond line"
first line
second line

Hey,

This is what i am looking for ... i have a shellscript whcih creates a report. Report has got 5 rows and each row should start from byte 1 and end at byte 80 . This should follow for the remainign 5 rows ..... hope this explains .....

Did you mean like this?

Code:

printf "%-73s%-7s" "hello" "goodbye"
hello                                                                    goodbye