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Full Discussion: Regex in if-then-else statement to match strings
Top Forums UNIX for Dummies Questions & Answers Regex in if-then-else statement to match strings Post 302136557 by drl on Tuesday 18th of September 2007 10:59:41 AM
Old 09-18-2007
Hi.

If you can use bash3, then the "=~" operator and "[[" "]]" can be used with regular expressions.

However, a method that would work with all Bourne-family shells would be:
Code:
if echo "$VARIABLE" | grep "regular-expression"
then
  echo Success
else
  echo Failure
fi

Your version of grep may or may not allow the repeat count, GNU grep does.

See man bash for details on the former ... cheers, drl
 

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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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