bug#30350: Build breakage of master on MacOS 10.13

[Philipp Stephani]

Mikhail Gusarov <dottedmag@dottedmag.net> schrieb am Di., 6. Feb. 2018 um 16:28 Uhr:

Hi.

On Tue, 6 Feb 2018, at 09:08, Philipp Stephani wrote:

I see a breakage of Emacs build on master under MacOS 10.13. Build stops with the following message:

org/org-timer.el:39:1:Error: Searching for program: Is a directory, /bin/zsh

The file in question is not a directory:

% ls -l /bin/zsh

404K -rwxr-xr-x 1 root wheel 596K

This is https://debbugs.gnu.org/cgi/bugreport.cgi?bug=30350.

Yes, it is. I can't find the relevant sources right away, but opening a file inside a file is a syntax for opening resource forks under OS X, so `/foo/bar/baz/.` is a "directory" of resource forks there. This syntax is not likely to go away anytime soon.

It's true that you can access the forks in a pseudo-directory /foo/bar/baz/..namedforks/, but faccessat still seems to work correctly even for files containing resource forks, at least on my system. That is, the POSIX API doesn't actually treat /foo/bar/baz/. as a directory.