Say - entirely hypothetically - we know a shell script that is executed with root privileges via sudo and we found a way for normal users to convince it to call their own code.
For demonstration purposes it then would be nice to have code that invokes a local root shell, ready …
It's well known that syscalls are expensive. And that software mitigations against CPU bugs (such as Meltdown) even have made them more expensive. But how expensive are they really? To begin to answer this question I wrote a small micro-benchmark in order to measure the minimal costs of a syscall …
More and more open source projects seem to switch to the Meson build tool, in the last years. In an attempt to quantify this development I looked at the build tools usage by Fedora packages, during the last 14 years.
Meson is a build tool with good C …