Though to be fair a lot of the standard C libraries have there own "Linux" version in the Kernel so the OS can do things without using the OS...
http://lxr.linux.no/linux+v4.10.1/include/linux/
Though to be fair a lot of the standard C libraries have there own "Linux" version in the Kernel so the OS can do things without using the OS...
http://lxr.linux.no/linux+v4.10.1/include/linux/