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Full Discussion: grep regular expression to find = not ==
Top Forums UNIX for Dummies Questions & Answers grep regular expression to find = not == Post 302413375 by offkilter on Thursday 15th of April 2010 11:50:00 AM
Old 04-15-2010
doesn't work
Anbu23,
Thanks, but this finds != in if statements and lines with variable names that have 'if' in them.

---------- Post updated at 11:50 AM ---------- Previous update was at 11:35 AM ----------

Vbe,

May end up with 2 responses to you - i tried editing response to Anbu23 to add response to you, but it doesn't look like it took. At that time I hadn't found the combination that worked, but this does. Thanks for your response.

cat *.cpp | egrep "^if\b*\(.+=[^=]*" | egrep -v "=="

Part of the exercise was to understand regular expressions. I am still interested in why my expression wasn't eliminating the 2nd = if someone can figure that out. Also, I am still getting the unbalanced expression if I use grep. Any idea why that is?
 

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LEARN ABOUT V7

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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