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Top Forums Shell Programming and Scripting Combining a declared variable with a temporary variable Post 303027146 by RudiC on Monday 10th of December 2018 07:31:44 AM
Old 12-10-2018
See if this quite incomplete sketch can be used as a starting point for your future solution:


Code:
FWCMD="echo firewall-cmd --"
OPT1="state"
OPT2="panic-on"
OPT3="panic-off"
OPT4="query-panic"
OPT5=""
OPT6=""
OPT7="help"

if [ -n "$1" ]
  then  $FWCMD$1
        echo exit 0
  else  echo "FIREWALL COMMANDER"
        echo ""
        PS3="Select from above (q or <ctrl>D to quit): "
        select PICK in "Show STATE of the Firewall" "Set Panic Mode ON" "Set Panic Mode OFF" "Show the Panic Mode Status" "NULL" "NULL" "Print out the HELP information"
          do    [ "${REPLY,,}" = 'q' ] && break
                TMP=OPT$REPLY
                $FWCMD${!TMP}
          done
fi

It uses the select statement incl. the PS3 variable for building the menu, and "variable indirection" to build the command, here used with echo for simplicity. Supplying arguments as command line arguments is a better choice than making them a part of the command, btw.

A case statement leans itself towards being used in the loop, as is the use of array as alluded to by Don Cragun.
This User Gave Thanks to RudiC For This Post:
 

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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 5.11 3 Aug 1994 echo(1B)
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