I have created a C library to span a process with given input and receive its output.

One cannot just write to stdin of a process and then read its stdout through pipes, because this way it may lead to a deadlock.

Instead use my library:

• Homepage
• API docs

It is an alpha release, tested on Linux.

During its development I managed to crash Linux: https://bugzilla.kernel.org/show_bug.cgi?id=198549