OPTIND

["Chris F.A. Johnson" <dash@xxxxxxxxxxxxxx>]

  According to both the dash man page and the POSIX spec, "When the
  shell is invoked, OPTIND is initialized to 1."

  However, it actually takes the value of the environment variable
  if it exists:

$ OPTIND=4 dash -c 'echo "$OPTIND"'
4
$ OPTIND=4 bash -c 'echo "$OPTIND"'
1
$ OPTIND=4 ksh -c 'echo "$OPTIND"'
1
$ OPTIND=4 ksh93 -c 'echo "$OPTIND"'
1

--
   Chris F.A. Johnson, <http://cfajohnson.com/>
   Author:
   Pro Bash Programming: Scripting the GNU/Linux Shell (2009, Apress)
   Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)
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