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Full Discussion: Get value between brackets
Top Forums Shell Programming and Scripting Get value between brackets Post 302491133 by grepeverything on Wednesday 26th of January 2011 06:21:22 PM
Old 01-26-2011
Code:
tail -2 infile  | grep -oP '(?<=\()[[:digit:]]+(?=\))'

Assumes last line never has a pattern like "(nnnnnn)", where n are some number of digits. Pattern matches one or more (+) digits between parentheses but not the parentheses themselves (-P switch enables the use of Perl look-behind/look-ahead).

If the second to the last line is really fixed to be
4 ETW000 End of Transport (0000)
where only the number inside the () varies, and this line never occurs elsewhere in the files, then you could simplify and use:
Code:
grep -oP '(?<=4 ETW000 End of Transport \()[[:digit:]]+(?=\))'  infile

Last edited by grepeverything; 01-26-2011 at 07:28 PM..
 

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LEARN ABOUT BSD

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)
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