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Top Forums Shell Programming and Scripting check input = "empty" and "numeric" Post 302150845 by porter on Wednesday 12th of December 2007 09:47:01 PM
Old 12-12-2007
checking for empty is easy

Code:
if test "$VAR" = ""
then 
    echo empty
fi

checking for numeric, I would use case,

Code:
case "$VAR" in
[0-9]* )
         echo at least it starts with a numeric...
        ;;
* )
       ;;
esac

 

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suspend(1)							   User Commands							suspend(1)

NAME
suspend - shell built-in function to halt the current shell SYNOPSIS
sh suspend csh suspend ksh suspend DESCRIPTION
sh Stops the execution of the current shell (but not if it is the login shell). csh Stop the shell in its tracks, much as if it had been sent a stop signal with ^Z. This is most often used to stop shells started by su. ksh Stops the execution of the current shell (but not if it is the login shell). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), kill(1), ksh(1), sh(1), su(1M), attributes(5) SunOS 5.10 15 Apr 1994 suspend(1)
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