M Starch

@zimri-leisher sorry, I was half-way through reviewing when I go side-tracked. Added more comments. @ me if you need more insight.

I'll try to keep an eye on CI and report any other buried errors!

Framework failure caused by: #2835. Will rerun.

We need to answer if F Prime should distinguish between multiple downlinks of the same file, or if it should pass to the project. Also, is this superseded by CFDP?

My one hesitation would be that `rsync` may not come preinstalled where scp does. Perhaps we can just use a different spin of `scp` https://serverfault.com/questions/538368/make-scp-always-overwrite-or-create-directory

Recommendation: just copy binary with explicit destination,

Summing up, we should: 1. Improve clarity of SDD on this point 2. Add a code-comment indicating that this usage is intended to be different. I think a completely new...

Note: starting with a conversion of portNum, as that is *most* of the issue and this will reduce noise in the remaining PRs.

This was merged.

@rlcheng You'll need to set the above see in the UT to get it to crash. The seed is: `965653` and can be updated at this line: https://github.com/nasa/fprime/blob/4476828cb388a4a240ae7c56e37d76443f85ab15/Os/Posix/test/ut/PosixFileTests.cpp#L141