UNIX for Dummies Questions & Answers

Guys, Really appreciate your quick response.!!

I am a beginer in the Unix area, thats may b reason i still could nt get solve the problem

This is the sample of the code I have written. But its not working correctly.

The substitution part works good. But I would like to add 2 more display statements.

Display the Original strings & those got replaced. But thats not coming correctly.I tried with both for loop & awk as suggested by you guys.

But not working.

Please advice.

Sample code :--

Code:

#/bin/ksh
echo "Enter the file name "
read input_file
echo "This is the Contents "
cat $input_file
#IFS="\n"
for line in `cat input_file`
do
echo ${line:1:3}
done
#awk '{val=substr($0,1,3);print val}' input_file
sed -e 's/ABC /XYZ /' -e 's/DEF /ABCD /' <$input_file >$output_file
cat $output_file
echo "Bye"

Hi I do not know what exactly isn't working, but I changed your code so that it is providing output as I figured you intended with your script (not your original specification, since this seems to be quite different).

You can take it from there. Otherwise perhaps you could be more specific about what isn't working.

Code:

#!/bin/ksh
echo "Enter the file name "
read input_file
echo "This is the Contents "
cat "$input_file"
output_file="${input_file}.out"
while read line
do
  echo "${line:0:3}"
done < "$input_file"
sed -e 's/ABC /XYZ /' -e 's/DEF /ABCD /' <$input_file >$output_file
cat "$output_file"
echo "Bye"

Hi,

Thanks for the response.

Still Getting an error at the string display part!!

I will summarise what I am trying to do. Sorry if I had confused anyone.
I am pasting the in_file & out_file for your referece.

Please help.

This is my problem:--->

In_file

I like Orange Very Much
I like Mango also
We are Grape lovers.
We play Cricket usually
We are Chess players

The out_file needs to look like this

I like Apple Very Much
I like Apple also
We are Grape lovers.
We play Football usually
We are Football players


Task for Shell script :---

1 Read in_file --> user input
2 Get out_file name --> user input
3 Display the strings b/w coulmn 9 to 17 in the in_file for all the records.


Changes
--------
4 If Orange/Mango comes in the specified postion need to change as Apple.


5 If Cricket/Chess comes in the specified postion ,need to replace as Football and save in the out_file

6 Display the strings b/w coulmn 9 to 17 in the output file

( Like this i have many changes. I am using a single SED command for the task, It is working fine(but its just a pattern matching one, not checking position, I would like to add that feature also) . But problem is the string display portion is not working )



Thanks

What do you mean with "b/w" ?
If I display colums 9-17 I get:

Code:

$> cut -c9-17 infile
range Ver
ango also
rape love
Cricket u
hess play

Do you mean 8-16:

Code:

$> cut -c8-16 infile
Orange Ve
Mango als
Grape lov
 Cricket
Chess pla

So the original lines with the words replaced only if they happen to fall into these columns?

If i get you correctly, this will do what you want and you can take it from here:

Code:

#!/bin/ksh
echo "Enter Input file"
read infile
while read line
do
wd=$(echo "${line}" | cut -c 9-17)
echo "The word in the specified position is: ${wd}"
echo "Enter the word to change it with:"
read wrd < /dev/tty
changed=$(echo "${line}" | sed 's/'"${wd}"'/'"${wrd}"'/')
echo ${changed} #> output.out
done < "${infile}"

Hi

b/w is short form of 'between'......

Starting position of the String is where the words like Orange/Mango/cricket etc.. (starting position is 8 I guess...and from there next 7 characters )

i/p file data :--->

I like Orange Very Much
I like Mango also
We are Grape lovers.
We play Cricket usually
We are Chess players

o/p file data needed -->

I like Apple Very Much
I like Apple also
We are Grape lovers.
We play Football usually
We are Football players


I need the original lines with the words replaced in the output file if they happen to fall into these columns.

but would like to display the portions replaced alone also . This for only display purpose.

---------- Post updated at 02:51 AM ---------- Previous update was at 02:43 AM ----------

Malcom..


Seems your code is fine..Thanks..I will confirm with in 15 mins.

Thanks

---------- Post updated at 03:37 AM ---------- Previous update was at 02:51 AM ----------

Malcome,

Your script is working fine if both strings ( Original and replaced part )
are of identical size.

ie It is working fine If am replacing 'Orange' (6 leter ) by another 6 leter word (say 'apples').

But If am replacing a 7 letter word ( say 'Cricket' ) with a 4 letter word ( say 'Golf' ) then its not working fine. It will replace the word .But position of next column changes.

This is wat i need -->

If a 7 leter word is replaced by a 5 leter word, then next 2 positions will be 'SPACES' so that the position of next column remains unchanged.


I guess u got my problem.

What happens when a 4 letter word is replaced by a 7 letter word?