[Solved] Read and validate input arguments Post: 302882874

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Top Forums Shell Programming and Scripting [Solved] Read and validate input arguments Post 302882874 by Corona688 on Thursday 9th of January 2014 12:39:32 PM

01-09-2014

Registered User

Saving args to a variable like that is going to break down if any of your filenames have spaces or the like.

Just do a little more checking in your input loop:

Code:

#!/bin/bash

die() {
        echo "$@" >&2
        exit 1
}

## Read input arguments
while [ $# -ge 1 ]; do 
    case "$1" in 
        -v | --verbose ) verbose=true;; 
        -z | --gzip )
                [ -z "$compression" ] || die "Conflicting option $1"
                compression="gz";; 
        -b | --bzip2 )
                [ -z "$compression" ] || die "Conflicting option $1"
                compression="bz";; 
        -n | --no-compress)
                [ -z "$compression" ] || die "Conflicting option $1"
                compression="none";;
        -h | --help ) showUsage; exit 0 ;; 
        *) die "Invalid option $1. Use -h or --help to show usage" ;; 
    esac
    shift
done

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LEARN ABOUT DEBIAN

plscompression

PLSCOMPRESSION(3plplot) 					    PLplot API						   PLSCOMPRESSION(3plplot)

NAME

       plscompression - Set device-compression level

SYNOPSIS

       plscompression(compression)

DESCRIPTION

       Set  device-compression level.  Only used for drivers that provide compression.	This function, if used, should be invoked before a call to
       plinit(3plplot).

       Redacted form: plscompression(compression)

       This function is used in example 31.

ARGUMENTS

       compression (PLINT, input)
	      The desired compression level. This is a device-dependent value. Currently only the jpeg and png devices use these values. For  jpeg
	      value  is  the  jpeg  quality which should normally be in the range 0-95. Higher values denote higher quality and hence larger image
	      sizes. For png values are in the range -1 to 99. Values of 0-9 are taken as the  compression level for zlib. A value of  -1  denotes
	      the  default  zlib   compression	level.	Values	in the range 10-99 are divided by 10 and  then used as the zlib compression level.
	      Higher compression levels correspond to greater compression and small file sizes at the expense of more computation.

AUTHORS

       Geoffrey Furnish and Maurice LeBrun wrote and maintain PLplot.  This man page was automatically generated from the DocBook  source  of  the
       PLplot documentation, maintained by Alan W. Irwin and Rafael Laboissiere.

SEE ALSO

       PLplot documentation at http://plplot.sourceforge.net/resources.

								   August, 2012 					   PLSCOMPRESSION(3plplot)

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