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Full Discussion: Numeric computations in bash
Top Forums UNIX for Dummies Questions & Answers Numeric computations in bash Post 302622463 by kristinu on Thursday 12th of April 2012 07:36:57 AM
Old 04-12-2012
I am thinking of setting the verbosity level using a call to a function.

In the bash script I have two variables

Code:
hasArgument_vbLevel       # set to "true" if user specified vbLevel
 value_vbLevel                  # contains the verbosity level of the user

I would want to call the function and pass it value_vbLevel. The function setVerbosity
will set vbLevel which will be used in the script.

In the script I will have

Code:
value_vbLevel=$1   # User inputs " none", "low", "medium", "high" or "debug"
 
none=0; low=1; medium=2; high=3; debug=4

vbLevel=$medium                        # Set default verbosity
if [ "$hasArgument_vbLevel" == "true" ]; then
  setVerbosity $value_vbLevel     # In the program I would use vbLevel. Need to set vbLevel somehow
fi

if [ $vbLevel -gt $low ]; then  # Example of use of the vbLevel as number 0-4
   ...
fi

Here I have started doing some code, but need some help and suggestions on the way forward.

Code:
function setVerbosity() {

  # -- Check for valid verbosity level -------------------------------------------------------------

  local locl_vbLevelStr=$1

  isVbLevel="false"
  for vb in "none" "low" "medium" "high" "debug"
  do
    echo $vb
    if [ "$locl_vbLevelStr" == "$vb" ]; then
      isVbLevel="true"
    fi
  done

  # -- Set verbosity level -------------------------------------------------------------------------

  vbLevel="${!locl_vbLevel}"

  if [ "$isVbLevel" == "false" ]; then
    echo "EXIT"
    exit 1
  fi

}

Last edited by kristinu; 04-12-2012 at 11:45 AM..
 

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LEARN ABOUT OPENSOLARIS

libbash

LIBBASH(7)							  libbash Manual							LIBBASH(7)

NAME

     libbash -- A bash shared libraries package.

DESCRIPTION

     libbash  is  a package that enables bash dynamic-like shared libraries. Actually its a tool for managing bash scripts whose functions you may
     want to load and use in scripts of your own.

     It contains a 'dynamic loader' for the shared libraries ( ldbash(1)), a configuration tool (ldbashconfig(8)), and some libraries.

     Using ldbash(1) you are able to load loadable bash libraries, such as getopts(1) and hashstash(1).  A bash shared library that can be  loaded
     using
     ldbash(1) must answer 4 requirments:

     1.     It must be installed in $LIBBASH_PREFIX/lib/bash (default is /usr/lib/bash).

     2.     It must contain a line that begins with '#EXPORT='.  That line will contain (after the '=') a list of functions that the library
	    exports.  I.e. all the function that will be usable after loading that library will be listed in that line.

     3.     It must contain a line that begins with '#REQUIRE='.  That line will contain (after the '=') a list of bash libraries that are
	    required for our library.  I.e. every bash library that is in use in our bash library must be listed there.

     4.     The library must be listed (For more information, see ldbashconfig(8)).

   Basic guidelines for writing library of your own:
     1.     Be aware, that your library will be actually sourced. So, basically, it should contain (i.e define) only functions.

     2.     Try to declare all variables intended for internal use as local.

     3.     Global variables and functions that are intended for internal use (i.e are not defined in '#EXPORT=') should begin with:
		  __<library_name>_
	    For example, internal function myfoosort of hashstash library should be named as
		  __hashstash_myfoosort
	    This helps to avoid conflicts in global name space when using libraries that come from different vendors.

     4.     See html manual for full version of this guide.

AUTHORS

     Hai Zaar <haizaar@haizaar.com>
     Gil Ran <ril@ran4.net>

SEE ALSO

     ldbash(1), ldbashconfig(8), getopts(1), hashstash(1) colors(1) messages(1) urlcoding(1) locks(1)

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