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# 1  
Old 01-05-2013
Sun Multi if or or similar
I'm trying to code a line (ksh) without much success along the lines of :-

If [ hostname = red or black or green or yellow or blue ]
then
.....etc
fi

I know i could use the case statement but i'm hoping someone may know a one liner or a simple workaround.
# 2  
Old 01-05-2013
Code:
#!/usr/bin/ksh

hostname="${1}"

if [[ "${hostname}" = @(red|black|green|yellow|blue) ]] ; then
   echo "${hostname} - match"
else
   echo "${hostname} - no match"
fi

Last edited by vgersh99; 01-06-2013 at 11:57 AM.. Reason: change color to hostname - thanks, Don
These 2 Users Gave Thanks to vgersh99 For This Post:
Don Cragun squrcles
# 3  
Old 01-05-2013
thanks it works perfectly, what do i need to read up on to better understand the logic behind it.
# 4  
Old 01-05-2013
Quote:
Originally Posted by vgersh99
Code:
#!/usr/bin/ksh

hostname="${1}"

if [[ "${hostname}" = @(red|black|green|yellow|blue) ]] ; then
   echo "${color} - match"
else
   echo "${color} - no match"
fi

Thanks for pointing out how to do this in the Korn shell. I assume you meant to use $hostname (or ${hostname}) in both places where you used ${color}.
# 5  
Old 01-06-2013
Quote:
Originally Posted by Don Cragun
Thanks for pointing out how to do this in the Korn shell. I assume you meant to use $hostname (or ${hostname}) in both places where you used ${color}.
yeah, sorry - color was the original variable name.
# 6  
Old 01-06-2013
Quote:
what do i need to read up on to better understand the logic behind it.
Read up on Korn shell regular expressions.
# 7  
Old 01-06-2013
Quote:
Originally Posted by mjf
Read up on Korn shell regular expressions.
Actually, that is extended pattern matching, not a regular expression.

Code:
       A  pattern-list	is  a list of one or more patterns separated from each
       other with a & or |.  A & signifies that all patterns must  be  matched
       whereas	|  requires  that only one pattern be matched.	Composite pat-
       terns can be formed with one or more of the following sub-patterns:
	      ?(pattern-list)
		     Optionally matches any one of the given patterns.
	      *(pattern-list)
		     Matches zero or more occurrences of the given patterns.
	      +(pattern-list)
		     Matches one or more occurrences of the given patterns.
	      {n}(pattern-list)
		     Matches n occurrences of the given patterns.
	      {m,n}(pattern-list)
		     Matches from m to n occurrences of  the  given  patterns.
		     If  m  is	omitted,  0  will be used.  If n is omitted at
		     least m occurrences will be matched.
	      @(pattern-list)
		     Matches exactly one of the given patterns.
	      !(pattern-list)
		     Matches anything except one of the given patterns.

man ksh93

---
@squrcles: Why can't you use a case statement?
Code:
case $hostname in 
  (red|black|green|yellow|blue) echo "match"
esac

Last edited by Scrutinizer; 01-06-2013 at 04:47 PM..
This User Gave Thanks to Scrutinizer For This Post:
squrcles
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