Re: Forwarding stdout/stderr of a child process in batch mode

[Zhu Zihao]

IMO, in batch mode, `message` writes to stderr, `princ` writes to
stdout. You can install a filter for childprocess, and run functions I
mentioned above to forward these outputs.


Paul Pogonyshev writes:

> Hi,
>
> I'm using Emacs in batch mode. I need to invoke a child process that
> is a longish operation (a few minutes). During this time, it writes to
> its stdout, so user will see that it is working and what exactly is
> being done. However, if I invoke it from Emacs (e.g. using
> `call-process') I see no way of forwarding this output to the "real"
> stdout. So, for a user this looks like the process (or batch Emacs on
> top of it) is hung.
>
> Am I missing a way to forward output?
>
> Paul


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Zihao

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