Re: [Sbcl-help] sb-ext:run-program question

[Christophe R. <cs...@ca...>]

Friedrich Dominicus <fr...@q-...> writes:

> /bin/cat: /tmp/t1.txt | /bin/grep eins: No such file or directory
>
> what am I doing wrong?

RUN-PROGRAM is a wrapper around fork()/exec(); it does not touch the
shell.  The pipe character | is a shell feature which arranges for a
pipe to connect the output of one process to the input of the other.

> What I want in the end is that I run an external program, maybe in a
> piple which should give me a stream from which I can read. How am I
> supposed to do that in SBCL?

Construct your pipes, either using SB-POSIX or by running two programs
with run-program and connecting the streams up yourself (but beware:
possible deadlocks lurk).

Cheers,

Christophe