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Full Discussion: Combining a declared variable with a temporary variable
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:
clee
 

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LEARN ABOUT DEBIAN

shtool-echo

SHTOOL-ECHO.TMP(1)					      GNU Portable Shell Tool						SHTOOL-ECHO.TMP(1)

NAME

       shtool-echo - GNU shtool echo(1) extensional command

SYNOPSIS

       shtool echo [-n|--newline] [-e|--expand] string

DESCRIPTION

       shtool echo is an echo(1) style command which prints string to stdout and optionally provides special expansion constructs (terminal bold
       mode, environment details, date, etc) and newline control. The trick of this command is that it provides a portable -n option and hides the
       gory details needed to find out the environment details under option -e.

OPTIONS

       The following command line options are available.

       -n, --newline
	   By default, output is written to stdout followed by a "newline" (ASCII character 0x0a). If option -n is used, this newline character is
	   omitted.

       -e, --expand
	   If option -e is used, string can contain special "%x" constructs which are expanded before the output is written. Currently the
	   following constructs are recognized:

	   %B  switch terminal mode to bold display mode.

	   %b  switch terminal mode back to normal display mode.

	   %u  the current user name.

	   %U  the current user id (numerical).

	   %g  the current group name.

	   %G  the current group id (numerical).

	   %h  the current hostname (without any domain extension).

	   %d  the current domain name.

	   %D  the current day of the month.

	   %M  the current month (numerical).

	   %m  the current month name.

	   %Y  the current year.

EXAMPLE

	#   shell script
	shtool echo -n -e "Enter your name [%B%u%b]: "; read name
	shtool echo -e "Your Email address might be %u@%h%d"
	shtool echo -e "The current date is %D-%m-%Y"

HISTORY

       The GNU shtool echo command was originally written by Ralf S.  Engelschall <rse@engelschall.com> in 1998 for Website META Language (WML)
       under the name buildinfo. It was later taken over into GNU shtool.

SEE ALSO

       shtool(1), echo(1).

18-Jul-2008							   shtool 2.0.8 						SHTOOL-ECHO.TMP(1)
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