How to make sure the input string is one of many options?
How to make sure the input string is one of many options e.g centos-5.5-i386 windows-2003r2-x64 ?
The options are dynamic, so "case" condition check doesn't work.
I use grep -o -w , it doesn't work every time because - is valid word boundry
Code:
#word windows-2003 failed the check as expected
$input=windows-2003
$echo "centos-5.5-i386 windows-2003r2-x64" | grep -o -w $input
#word windows-2003r2 passed the check, but it is not a valid option
$input=windows-2003r2
$echo "centos-5.5-i386 windows-2003r2-x64" | grep -o -w $input
windows-2003r2
Thanks, but it is misunderstood,
the input has to be EXACT match of one of options e.g.
centos-5.5-i386 windows-2003r2-x64 freebsd-6.1-i386
so, centos/freebsd/windows are not valid input
I am looking for a shell one-liner,any command, to achieve this, grep is just an example
I could compare the length of the input string and length of the string being search/replaced, but not an elegant solution.
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