"sed" bug?

["D. Richard Hipp" <drh@acm.org>]

The following script works under Linux but fails on
Cygwin20 running under Windows95:

  #! /bin/sh
  echo 'E:/a/b/c' | sed 's,^\([a-zA-Z]\):/,//\1/,'

Under Linux the output is "//E/a/b/c".  Under Cygwin20,
the output is "E:/a/b/c".  That's if I run the script from
a file.  (The same file -- samba mounted off of the Linux
machine.)  If I type the command in directly at the
shell prompt, it works correctly on both machines.

Obviously, I'm trying to changes a pathname to the Cygwin
format from the windows format.  This is in the middle of
a "configure" script.  I've tried lots of things to work
around this, but with no success.  The problem seems to be
in the "\(" and "\)" of the expression.

Does anybody know of a work-around?  Am I doing something
stupid here?

Replys to drh@acm.org are appreciated.
-- 
D. Richard Hipp -- drh@acm.org -- http://www.hwaci.com/drh/

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