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Full Discussion: grep not working
Top Forums UNIX for Dummies Questions & Answers grep not working Post 302240057 by era on Thursday 25th of September 2008 01:54:25 AM
Old 09-25-2008
No, the if is correct. If you use test instead of [ you don't need the closing square bracket. Single equals signs are permitted (and I believe more portable than double equals signs).

It's not clear from which command you want the exit code in $? -- from the echo, or from some previous command? The way I read it you will always have the exit code from the echo, which will always be zero; is that not what you are seeing?

In what way are the greps failing -- not running, or not returning what you expect? Do you get an error message?
 

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LEARN ABOUT PHP

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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