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How to check for contrl-M characters

 
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Top Forums UNIX for Dummies Questions & Answers How to check for contrl-M characters
# 1  
Old 08-15-2008
Data How to check for contrl-M characters
Hii

When i am using the following command for checking the ctrl-m characters am getting "Substitution pattern match failed" error.
Actually i jus want to check and not to substitute.
Please suggest me as whats wrong in the below command.

1,$s/Ctrl+vCtrl+m//g

Thanks
ladtony
# 2  
Old 08-15-2008
Probably the application you are using doesn't support using literal control-M:s in regex substitution. Is this sed or vi or some other beast? Is there a reason you don't just run dos2unix or comparable on the file? There is regrettably no single standard portable command which works everywhere, but search this site for "ctrl-m" or "carriage return" or "DOS" or ...
# 3  
Old 08-15-2008
As era said or try out

Code:
cat infile| tr -d '\015' > newfile

Btw., you don't have to explicit address from 1 to $ since if you don't specify an address, it will process the whole input file.
# 4  
Old 08-15-2008
thanks....Zaxxon...
but what is 015 in the command u gave
ladtony
# 5  
Old 08-15-2008
That's the octal value for ^M.

Btw., the better way to write it (saving the cat), correcting myself, is:
Code:
tr -d '\015' < infile > outfile

# 6  
Old 08-15-2008
Just curious, why would you want to just check for? Any purpose for it? :/
# 7  
Old 08-15-2008
i fyou just wanna check for^M char
open the file in vi editor press escape then type /ctrl+vctrl+m
this should work...
 
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