How to concat line first and then removing the ^M character

Shell Programming and Scripting
1

hi

Someone can give me some clue or script in writing the below requirement

I am having 5 or 10 files of unix files which contain ^M charactes.

First we have to find ^M character and concat the line where it has broken and then we have to remove the ^M character from the uxix files.

Thanks

2

This is an already discussed topic

Refer this

3

Hari

I know the answer for removing the ^M ie..

awk '{ sub("\r$", ""); print }' filenew > newfilename which works for me .

First we have to search ^M and then concat the line and then remove . I am not able to find concat ideas.

Thanks

4 
cat file1 file2 file3 file4..... > filenew
awk '{ sub("\r$", ""); print }' filenew > newfilename

or

cat file1 file2 file3 file4..... > filenew
dos2ux filenew > newfilename
5

Hari

In one file it has some lines like this

CDMA 1x=5102305, 2008-09-05 07:59:04, NAI=$QCMIPNAI^M
0000000000@vzw3g.com, MIN=0000007356, Config=62558-11 Verizon Std P3

Here first we have to make it in one line and then remove the ^M .

For me dos2unix is not working in Linux.

Thanks

6

Hi,
if it's a question of first removing RETURN, maybe pushing it through tr -d "\r" could help?

/Lakris

PS or tr "\r" " " and take it from there?

7

Try this:

sed '/^M$/N;s/^M\n//' file

To get the ^M character type <CTRL>-v and <CTRL>-m successively.

Regards

8

lakis

I am looking for a automatic script in finding the ^M and then doing concat the line .
Suppose in the file we have 10 lines with ^M .

I checked the tr command it is not working. Please give me another clue.

Thanks

9

in linux it is

dos2linux
10

Franklin

Thanks for your help.

Your script is working manually one by one at the command prompt.
But I am trying to do automatic the script is below which is not working.
For ^M character --> I am pressing < crtl v and Ctrl M> in the script.

for file in `ls /home/applmgr/test/`
do
CHECK=`cat $file | grep "^M" | wc -l`
if [ $CHECK -eq 1 ]
then
sed '/^M$/N;s/^M\N//' $file > /tmp/tempfile.tmp
mv /tmp/tempfile.tmp $file
fi
done

Please let me know if any clue or suggestion for making automatic

Thanks

11

Try this, beware of the ^M characters, type it as I early mentioned (with vi):

#!/bin/sh

for file in /home/applmgr/test/* ; do
  grep '^M' "$file" >/dev/null
  if [ $? == 0 ]; then
    sed '/^M$/N;s/^M\n//' "$file" > /tmp/tempfile.tmp
    mv /tmp/tempfile.tmp "$file"
  fi
done

Regards

12

Franklin

It worked .
Here it should be sed '/^M$/N;s/^M\n//' "$file" > /tmp/tempfile.tmp

Thanks for your help.