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Full Discussion: Doing Checks on a file
Top Forums UNIX for Advanced & Expert Users Doing Checks on a file Post 302224055 by buffoonix on Tuesday 12th of August 2008 06:24:45 AM
Old 08-12-2008
Haven't tested it but I think it should be as easy as
Code:
if grep -qE '^[AB][0-9][0-9][0-9]' ${SECOND.CSV}; then
    # do something
fi

I am even convinced that the -E option in the grep is redundant.
For such trivial expression we don't need to fire the extended regex engine.
Btw, a variable name containing a dot isn't good naming I would say.
 

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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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