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Write a shell script to find ctrl M and delete them

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# 1  
Old 08-16-2010
Write a shell script to find ctrl M and delete them
Hi All,

I would like to write a shell script to find Control M charactes and after getting the result i want to delete it. But in the script the following command couldn't work.
Code:
find . -exec grep -l '^M' {} \; > test.txt

^M is ctrl V and M

thanks in advance for any help.
Last edited by vbe; 08-16-2010 at 10:06 AM.. Reason: Code tags...
# 2  
Old 08-16-2010
Want to rewrite the command dos2ux (or dos2unix...) ?
# 3  
Old 08-16-2010
As vbe says maybe you just want to strip them out with dos2unix or something like:
Code:
tr -d '\015' < uglyfile > newfile

Can try:
Code:
find .| xargs file| awk -F: '/CRLF/ {print $1}'

Just have to make sure the file command produces "CRLF" as output too.
# 4  
Old 08-16-2010
Spurious carriage-return (ctrl/m) characters at the end of each line usually come from transferring files from Windows to unix using ftp in "binary" mode. Always transfer text files in "ascii" mode.
If you have a normal unix text file with some odd carriage-return characters then zaxxon's solution with "tr" is good.
# 5  
Old 08-16-2010
Quote:
Originally Posted by jatanig
Hi All,

I would like to write a shell script to find Control M charactes ... ^M is ctrl V and M

thanks in advance for any help.
To be clear, just in case, you should type ctrl-V ctrl-M, not ctrl-V M.

Although, as mentioned above, it sounds like you're trying to reinvent the wheel. dos2unix should do the job, if you have it. if not, tr to the rescue, as zaxxon suggested.

Regards,
Alister
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