Hello misc, Background: I'm running OpenBSD i386 6.6 stable: $ uname -mrsv OpenBSD 6.6 GENERIC.MP#3 i386
I've found that mkdir("/", mode) sets errno to EISDIR. Is this intended? By reading the manpage I expected mkdir(2) to fail with EEXIST. I know it's a bit silly to mkdir /, but I found this while porting a program that tried to recursively create directories. (The actual bug was a bit more convoluted: mkdir("/", mode) was called because false assumptions on how dirname(3) behaves, but that's another story.) I tried grepping the kernel code, but I'm not familiar at all with the internals, so I don't have a clear idea of where that EISDIR is generated (is it from vfs_lookup?)