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Top Forums Shell Programming and Scripting Check for file existence using wildcards Post 302361938 by jim mcnamara on Wednesday 14th of October 2009 12:45:22 PM
Old 10-14-2009
-r is a unary operator - meaning it takes one argument. Wildcards can return many file names.

I'm using the -q option, not all grep versions have it. Change as needed
Code:
ls |  grep -q  '\.[Ll][Aa][Ss]$'
if [[ $? -eq 0 ]] ; then
     echo 'ok'
else
     echo ' not ok'
fi

 

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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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