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Re: Asterisk expansion...
- To: Fergus Henderson <fjh at cs dot mu dot OZ dot AU>
- Subject: Re: Asterisk expansion...
- From: Earnie Boyd <earnie_boyd at yahoo dot com>
- Date: Mon, 27 Jul 1998 06:39:31 -0700 (PDT)
- Cc: gw32 <gnu-win32 at cygnus dot com>
- Reply-To: earnie_boyd at yahoo dot com
---Fergus Henderson <fjh@cs.mu.OZ.AU> wrote:
>
> On 24-Jul-1998, Earnie Boyd <earnie_boyd@yahoo.com> wrote:
> > ---"Robertson, Jason V" wrote:
> > >
> > > Hi,
> > >
> > > There seems to be an inconsistency in how * is interpreted.
When you
> > > run, say, 'echo.exe' from the commandline you get the following:
> > > C:> echo *.*
> > > <Contents of C: are listed>
> > > C:> echo \*.\*
> > > \*.\*
> > >
> > > So why does it expand the glob in the first instance, and not
unescape
> > > them in the second?
> >
> > It is the shells job to do the globbing not the programs.
>
> Then why does gnu-win32 do the globbing in the case of the command
> `echo *.*'?
In the case of the DOS shell command `ECHO' or `echo' is a shell
builtin; therefore, gnu-win32 doesn't even enter the picture. In the
case of the bash shell command `echo' is a shell builtin and globbing
happens as expected. Yes, I know there is an echo.exe; but, unless
you explicitely execute it you execute the builtin command.
To answer your question though, gnu-win32 globs the command line again
so that the filesystem emulation can happen rather seamlessly.
You responded to Michael Hirmke:
> No; he is assuming that gnu-win32 should use \ to escape characters.
> After all, it is gnu-win32 that is doing the globbing (expanding the
> wildcards), not command.com or cmd.exe.
This is an incorrect statement due to the first fact I stated. When
doing `echo \*.\*' within the DOS shell the globbing that occurs
within cmd.exe or command.com will not find a file and then returns
\*.\* to echo as the parameter list which it will simply write to stdout.
==
- \\||//
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--earnie_boyd@yahoo.com--
------ooo0O--O0ooo-------
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