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Re: [Groff] Inserting/importing jpeg photos into groff text?
From: |
Keith MARSHALL |
Subject: |
Re: [Groff] Inserting/importing jpeg photos into groff text? |
Date: |
Tue, 28 Mar 2006 12:56:41 +0100 |
>>> Note that some crippled shells (like on Windows) don't allow such
>>> piping; you have to use temporary files instead:
>>
>> Eh??? Standard cmd.exe, or even the older command.com, should be
>> well able handle such a pipe, provided the programs can be found in
>> the PATH.
>
> OK, fine to hear the opposite. Thanks. BTW, how many pipes are
> allowed in a single command?
AFAIK, there's no defined limit. A practical limitation arises from
the maximum length of the CLI input buffer; with command.com (MS-DOS)
this was a meagre 127 bytes; IIRC, cmd.exe (Win32) allows up to 2048.
Perhaps your confusion arises from the mechanism which MS-DOS used to
implement pipes; temporary files were used to capture the data in the
pipeline, to pass it from one process to the next, because the single
tasking nature of MS-DOS didn't allow all of the pipeline's processes
to coexist. However, this use of temporary files was transparent to
the user -- it just looked like a pipe, in the UNIX sense. Win32 is
a fully multitasking OS, so the implementation is now much closer to
the UNIX prototype, but it looks no different to the user.
Regards,
Keith.
Re: [Groff] Inserting/importing jpeg photos into groff text?, Keith MARSHALL, 2006/03/28
Re: [Groff] Inserting/importing jpeg photos into groff text?, Larry Kollar, 2006/03/28