how to catch DOS carriage return by egrep

[Gary Yu]

Dear all,

we have some files initially generated in some editors in windows environment and uploaded, which have DOS carriage return, it has a trailing '^M' if opened in vi, how can I identify those files by grep or egrep?

thanks,
Gary

[RAC_1]

You can do as grep "\^M" file.

I think you need to look at dos2ux command.
man dos2ux

Anil

[Hein van den Heuvel]

- check out 'dos2ux', a standard tool


- using 'man ed' you'll see you can express the dos line ends ( CR - LF ) with \r$

Hein.

[Steve Steel · Accepted solution]

Hi


grep -il CntrlVcntrlM filelist


Note controlV followed by control M


Steve Steel

[Chris Wilshaw]

try

grep ^V^M$ file

The ^V should allow you enter the ^M as a single character. The $ specifies that you're checking at the end of the line.

To remove them, use

cat file | sed -e s/^V^M$//g > new_file

[Gary Yu]

thank you guys, Steve's and Chris' way works fine. I know I can use dos2ux to convert them, I just need to identify those files for some other stuff.

thanks again,
Gary

[A. Clay Stephenson]

Here is one technique leveraging awk and looking for a terminal CR on a line. It exits with a status of 1 if a CR is detected and 0 otherwise.

#!/usr/bin/sh

INFILE=/mydir/myfile
awk 'BEGIN { X=0 } /.*\015$/ {X = 1; exit(X)} END {exit(X)}' < ${INFILE}
STAT=${?}
if [[ ${STAT} -eq 1 ]]
then
echo "File ${INFILE} has CR's"
else
echo "No CR's"
fi
exit ${STAT}