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From: prj@po.cwru.edu (Paul Jarc)
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Subject: Re: OT: svlogd-logprocessor with bash/multitee
Date: Wed, 13 Apr 2005 12:50:55 -0400
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Original-To: Henrik Heil <hhml@zweipol.net>
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Henrik Heil <hhml@zweipol.net> wrote:
> /usr/bin/multitee 0:6 0:7 \
> 7>&1 | sed s/test_stdin/test_fd7/

This can be simplified a bit:
multitee 0:6 0:1 | sed s/test_stdin/test_pipe/

> #!/bin/sh
> exec 6>&1
> /usr/bin/multitee 0:6 0:7 0:8 \
> 7>&1 | sed s/test_stdin/test_fd7/ \
> 8>&1 | sed s/test_stdin/test_fd8/
>
> # echo test_stdin | ./logproc.sh
>
> test_stdin
> [...programm does not return]

You have the second pipe set up between the two seds, but you want it
to be between multitee and the second sed:

{ { exec 7>&1 &&
    multitee 0:6 0:7 0:1 | sed s/test_stdin/test_pipe1/ >&6
  } | sed s/test_stdin/test_pipe2/
} 6>&1

bash has an extension that makes this easier:

multitee 0:1 \
  0:6 6> >(sed s/test_stdin/test_pipe1/) \
  0:7 7> >(sed s/test_stdin/test_pipe2/)


paul