IO redirect engine with metadata

Posted by hawk.hsieh on Stack Overflow See other posts from Stack Overflow or by hawk.hsieh
Published on 2012-09-13T02:56:46Z Indexed on 2012/09/13 3:39 UTC
Read the original article Hit count: 305

Filed under:

unix

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metadata

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io-redirection

Is there any C library or tool to redirect IO and be able to configured by a metadata. And provide a dynamic link library to perform custom process for feeding data into next IO. For example,

network video recorder:
- record video: socket > do_something() > file
- preview video: socket > do_something() > PCI device
http service:
- download file: socket > do_something(http) > file > socket
- post file: socket > do_something(http) > file
serial control:
- monitor device: uart > do_something(custom protocol) > popen("zip") > socket

I know the unix-like OS has IO redirect feature and integrate all application you want. Even socket IO you can use /dev/tcp or implement a process to redirect to stdout. But this is process based , the process's foot print is big , IPC is heavy. Therefore, I am looking for something to redirect IO in a process and the data redirect between IO is configurable with a metadata (XML,jason or others).

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