We can't entirely because of the C ABI but apart from that it's as simple as not using C which is not too difficult. C is not a popular language these days.
Yes that's what I said. You can generally wrap those layers so you aren't actually manipulating null terminated strings; just converting to/from them which is not too bad.
Well, you will need to give up SQLite if you really feel this way, and reimplement it in a safe language.
It will also be some time before Rust has substantial penetration into Linux; you might need to find a kernel that implements the POSIX interfaces safely.
