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Add pipe functions

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Olof hagsand 2023-07-04 20:48:01 +02:00
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doc/CLI.md
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@ -163,7 +163,10 @@ This can be done by making an `exec` call to a UNIX command, as follows:
execl("/usr/bin/tail", (char *) NULL);
```
See the `pipe_grep_fn()` in the source code for an example.
Another way to write a pipe function is just by using stdin and stdout directly, without an exec.
See the `pipe_json_fn()` in the source code for an example.
The clixon system itself arranges the input and output to be
redirected properly, if the pipe function is a part of a pipe tree as described below.