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Top Forums Shell Programming and Scripting How to export the string to a text file. Post 302691707 by RudiC on Saturday 25th of August 2012 11:08:09 AM
Old 08-25-2012
Quote:
Originally Posted by agama
It seems that grep is a built-in to your shell. There's no way otherwise that it would know that the file to search was also the target of redirection.
I was thinking about this as well, but -
Code:
grep --v
grep (GNU grep) 2.10

- it's a file in /bin and not a built-in. It must be using functionality like lsof to determineits own open files in the target directory?!
I could reproduce what you posted by adding a pipe to cat; now the output file contains what you post, i.e. one line referring to itself.

I still wonder why nanthagopal's disk fills up, though ...

Last edited by RudiC; 08-25-2012 at 12:18 PM..
 

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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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