implementing a rudimentary scp [closed]

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I am planning to learn usage of the openssh library and have been thinking of implementing a rudimentary scp to help with the learning.

Where will I find the information that I will need to implement scp? I have tried going through the openssh documentation, but was wondering if there is an easier starting point for openssh beginners?

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Yo can do so by watching scp do its work. Reading side does scp -f <source> and the writing side does scp -t <target>. If you interconnect them appropriately with FIFOs or so, you can see how exactly they interact.