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Full Discussion: [Solved] Read and validate input arguments
Top Forums Shell Programming and Scripting [Solved] Read and validate input arguments Post 302882968 by bakunin on Friday 10th of January 2014 06:35:10 AM
Old 01-10-2014
The solution of Corona will indeed work, but i think there is an even more "correct" solution to this: use the getopts keyword of your shell or the /usr/bin/getopts executable respectively.

getopts provides (basic) error handling and essentially does what you want to achieve, plus it understands the common UNIX-syntax: if you have "/some/command" and want to pass it two options, "x" and "y" you would write:

Code:
/some/command -xy

rather than

Code:
/some/command -x -y

Corona688s way of parsing the commandline would require the latter instead of the former. You might read the man page of getopts and ask again if you have any additional questions about its usage.

Here is a (very basic) example of how to use it: suppose you have 2 legal options, "-a" and "-b", of which one takes an additional argument:

Code:
#! /bin/ksh
typeset aflag=""
typeset bflag=""
typeset bval=""
typeset curropt=""
typeset -i OPTIND=0       # number of passed args

while getopts ab: curropt ; do
     case $curropt in
          a)
               aflag=1
               ;;

          b)
               bflag=1
               bval="$OPTARG"
               ;;

         ?)
               printf "Usage: %s: [-a] [-b value] args\n" $0
               exit 2
               ;;
     esac
done

if [ ! -z "$aflag" ] ; then
     printf "Option -a specified\n"
fi

if [ ! -z "$bflag" ]; then
     printf 'Option -b "%s" specified\n' "$bval"
fi

shift $(($OPTIND -1))           # clear cmdline
exit 0

I hope this helps.

bakunin
This User Gave Thanks to bakunin For This Post:
rbatte1
 

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LEARN ABOUT DEBIAN

apertium-validate-modes

apertium-validate-modes(1)												apertium-validate-modes(1)

NAME

       apertium-validate-modes - This application is part of ( apertium )

       This tool is part of the apertium open-source machine translation toolbox: http://www.apertium.org.

SYNOPSIS

       apertium-validate-modes <input_file>

DESCRIPTION

       This is an intermediate tool from Apertium level 2 engine. You should never have to use it independently.

       It is a script that validates a modes.xml file against the apertium structural modes DTD using the xmllint utility.

OPTIONS

       It has no options.

FILES

       input_file A modes.xml file

       modes.dtd The DTD used to validate the input file.

SEE ALSO

       apertium-gen-modes(1), apertium-gen-oldbil(1), apertium-interchunk(1), apertium-validate-postchunk(1), apertium-validate-interchunk(1).

BUGS

       Lots of them...lurking in the dark and waiting for you!

AUTHOR

       Copyright  (c)  2005-2007 Universitat d'Alacant / Universidad de Alicante.  This is free software.  You may redistribute copies of it under
       the terms of the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.

								    2006-03-11						apertium-validate-modes(1)
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