PCL: FileInfo f("").IsExecutable() is always true...

[georg.viehoever]

... but file "" is never executable.
Georg

[georg.viehoever]

Same if path is Directory ("/usr/bin") or symbolic link ("/bin").
Georg

[Juan Conejero]

... but file "" is never executable.

Bug fixed on master:
https://github.com/PixInsight/PCL/commit/8fe5112f350a4e9d8d60e7dc1a64d2a4777c4ab0

Thank you.

[Juan Conejero]

Same if path is Directory ("/usr/bin") or symbolic link ("/bin").

No, this is not a bug. Directories normally have the S_IXUSR permission flag set (along with S_IXGRP and S_IXOTH). For directories, "executable" means "searchable". This is a POSIX convention; see for example:

http://pubs.opengroup.org/onlinepubs/7908799/xsh/sysstat.h.html

You should always check if a path actually refers to a file with either FileInfo.IsFile() or FileInfo.IsDirectory() and FileInfo.Exists(), as appropriate.

I have just updated the documentation for FileInfo::IsExecutable() to clarify this:
https://github.com/PixInsight/PCL/commit/a1dedcaff28802ba9d08394d571e59e700c4d6fe

[georg.viehoever]

Fine with me. As long as it works as documented, I am happy. It is just a little bit surprising...
Georg