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Full Discussion: grep "\012$" problem
Top Forums Shell Programming and Scripting grep "\012$" problem Post 302180373 by royalibrahim on Monday 31st of March 2008 01:14:39 AM
Old 03-31-2008
Quote:
Originally Posted by era
Why are you looking for \n? By definition, if they are text files (and do not consist of a single line without any line ending terminator) they will have newlines in them. And grep can't grep for those, it greps the actual contents of the line but internally doesn't see the newlines.

Grepping for \015 (aka ^M, aka \r) before you attempt to remove it would make some sense. But unless the files are very large, it might make more sense to simply tr them all and then just remove the temp file if it's identical to the original.

A large backtick expression like that is pretty hard to debug, kudos for pulling it off. I would have refactored it into a while loop, though.

Code:
find . -type f |  # name "*" is redundant, isn't it?
# xargs grep -l '\015$' |  # ?  or grep -l '^M$' (that's opening quote, ctrl-v ctrl-m dollar sign, closing quote)
xargs file |
grep text |
cut -d: -f1 |
while read fil; do ...

My GNU grep can't grep for \octal codes anyway.
Thanks era for a clear illustration.

Could you tell me what purpose does '\032' serve in my script, i.e what symbol it is for?

Quote:
Originally Posted by ghostdog74
if you are just getting rid of new line characters, run your files through the dos2unix command.
Thanks ghostdog for the suggestion, however I would like to use script only rather a command.
Last edited by royalibrahim; 03-31-2008 at 06:34 AM..
 

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LEARN ABOUT LINUX

xzegrep

XZGREP(1)							     XZ Utils								 XZGREP(1)

NAME

       xzgrep - search compressed files for a regular expression

SYNOPSIS

       xzgrep [grep_options] [-e] pattern file...
       xzegrep ...
       xzfgrep ...
       lzgrep ...
       lzegrep ...
       lzfgrep ...

DESCRIPTION

       xzgrep  invokes	grep(1)  on  files  which may be either uncompressed or compressed with xz(1), lzma(1), gzip(1), or bzip2(1).  All options
       specified are passed directly to grep(1).

       If no file is specified, then standard input is decompressed if necessary and fed to grep(1).  When reading from  standard  input,  gzip(1)
       and bzip2(1) compressed files are not supported.

       If  xzgrep  is  invoked as xzegrep or xzfgrep then egrep(1) or fgrep(1) is used instead of grep(1).  The same applies to names lzgrep, lze-
       grep, and lzfgrep, which are provided for backward compatibility with LZMA Utils.

ENVIRONMENT

       GREP   If the GREP environment variable is set, xzgrep uses it instead of grep(1), egrep(1), or fgrep(1).

SEE ALSO

       grep(1), xz(1), gzip(1), bzip2(1), zgrep(1)

Tukaani 							    2010-09-27								 XZGREP(1)
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