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Top Forums UNIX for Dummies Questions & Answers how to break within a case/esac and stay in script Post 67278 by tumblez on Tuesday 22nd of March 2005 07:07:12 AM
Old 03-22-2005
how to break within a case/esac and stay in script

Wrote the following loop to but if I use exit, then I break entirely from my script, but instead I want to break from the case/esac and go to the next line in my script. I guess I need to know how to exit gracefully from a "while (true). Also, how can I allow the user to enter upper or lowercase as valid responses. An "A", will be treated the same as an "a", without replicating logic?

Code:
while (true)
do
  echo "  a b c "   
  echo " Enter one of the environments from above: \c"
  read reply
   case $reply in
      a)  echo a is valid & exit  ;;        
      b)  echo b is valid & exit ;;
      c)  echo c is valid & exit ;;
      *)  echo $reply is not valid - try again
   esac
done

 

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echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME
echo - echo arguments to standard output SYNOPSIS
/usr/ucb/echo [-n] [argument] DESCRIPTION
echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output. echo is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi- ronment variables. For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows: o echo your current-working-directory's full pathname o pipe the output through tr to translate the path's embedded slash-characters into space-characters o pipe that output through wc -w for a count of the names in your path. example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w" See tr(1) and wc(1) for their functionality. The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be invoked if the user calls echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the black-slashed escape characters, and ksh's echo() also understands a as the audible bell character; however, these commands do not have an -n option. OPTIONS
-n Do not add the NEWLINE to the output. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5) NOTES
The -n option is a transition aid for BSD applications, and may not be supported in future releases. SunOS 5.10 3 Aug 1994 echo(1B)
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