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Date:	Wed, 31 Oct 2012 15:40:51 -0400
From:	David T-G <d12 AT justpickone DOT org>
To:	"CygWin Users' List" <cygwin AT cygwin DOT com>
Subject:	Re: Command line arguments
Message-ID:	<20121031194051.GL67410@justpickone.org>
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Andrew, et al --

...and then Andrew DeFaria said...
%=20
% On 10/31/2012 11:23 AM, Brian Wilson wrote:
...
% >${1}, ${2}, etc.  Also, you may want to read up on the getopts command a=
s a
% >way to process command line arguments.
% Technically, the {}'s are not needed. You can access them with $1, $2,=20
...
% "/path/to/$1.save/dir" but not "/path/to/$1save/dir" you'd need the {}=20
% (i.e. "/path/to/${1}save/dir" because otherwise the shell would be=20
% looking for "1save" as an env variable name.

... except that environment variables cannot begin with numbers :-)

  davidtg AT madi:~ > cat /tmp/numvars.sh
  bash --version
  save=3Dx
  echo $save
  1save=3Dy
  echo $1save
  echo ${1save}
  davidtg AT madi:~ > bash -x /tmp/numvars.sh
  + bash --version
  GNU bash, version 2.05a.0(1)-release (i386-portbld-freebsd4.6)
  Copyright 2001 Free Software Foundation, Inc.
  + save=3Dx
  + echo x
  x
  + 1save=3Dy
  /tmp/numvars.sh: 1save=3Dy: command not found
  + echo save
  save
  /tmp/numvars.sh: ${1save}: bad substitution


% --=20
% Andrew DeFaria <http://defaria.com>
% Fear has its use but cowardice has none. - Mohandas Gandhi


HTH & Happy Hallowe'en

:-D
--=20
David T-G
See http://justpickone.org/davidtg/email/
See http://justpickone.org/davidtg/tofu.txt


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