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Full Discussion: what's wrong with if fi??
Top Forums Shell Programming and Scripting what's wrong with if fi?? Post 302689185 by Corona688 on Tuesday 21st of August 2012 12:15:23 AM
Old 08-21-2012
You've got at least one useless use of cat in there. Don't need to put X before your strings, you can test with -z. And should be quoting stuff (probably why you were getting the error).

But you don't need [ ] at all. Just test whether grep returns success or failure directly. You can suppress its output with -q on linux, or redirect its output with >/dev/null other places.

Code:
if grep -q vmx /proc/cpuinfo && zcat /proc/config.gz | grep -q CONFIG_KVM=y
then
        echo "something"
fi

 

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LEARN ABOUT PLAN9

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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