* Paul Eggert: > On 3/10/20 12:30 PM, Florian Weimer wrote: >> The glibc implementation needs /proc to avoid the race. There is no >> way around that, otherwise we introduce a security vulnerability. > > It is unfortunate that we have dueling paranoia here. coreutils mknod is > paranoid so it uses lchmod to avoid a race, and then glibc lchmod is paranoid > so > it refuses to work with lchmod unless /proc is mounted.
I now wonder if neither gnulib nor glibc should pretend that they can implement lchmod and fchmodat on Linux in a usable fashion. I added the emulation to glibc mostly because it was in gnulib. Otherwise, I would have insisted that a proper system call be implemented first.
