I don't think that the file (in this case, java.exe) is a symlink, and it's definitely not a shortcut. What really worries me is that it doesn't come up when calling (directory-list), which doesn't have as strong a filter as file-exists?. Is directory-list supposed to ignore anything?
I could pipe the DIR output to a file and compare to find what files/folders are missing in the list... On Thu, Dec 6, 2012 at 5:17 PM, Jay McCarthy <jay.mccar...@gmail.com> wrote: > file-exists? checks if it a FILE, it returns false on directories, links > (shortcuts), special files, etc. > > Could that be it? > > Jay > > > On Thu, Dec 6, 2012 at 3:13 PM, Tim Nelson <tbnel...@gmail.com> wrote: > >> Dear Benevolent Racketeers, >> >> I just installed DrRacket 5.3.1 on my Windows 8 Laptop. (Yes, >> Windows 8, please don't laugh at me. :-) ) I have not checked >> this on other operating systems or other versions of Racket. >> >> One of my Racket projects scans the PATH directories to locate >> the Java executable, if one is installed. I have the >> executable "java.exe" present in the C:\Windows\System32 folder, >> yet: >> >> > (file-exists? "C:\\Windows\\System32") >> #f >> >> To check myself, I invoked and manually scanned >> down (directory-list "C:\\Windows\\System32"), expecting to see >> #<path:java.exe> but did not. >> >> Moreover, counting hidden files and subfolders, I had 3576 files >> in that folder (confirmed via command prompt, not recursive). If >> I don't include hidden files, I have 3238. But: >> >> > (length (directory-list "C:\\Windows\\System32")) >> 2739 >> >> So it appears that (directory-list) is missing several hundred >> files that actually exist, including java.exe. java.exe is not >> hidden, not read-only, and it's not obviously a link. (And >> even if it was, shouldn't file-exists? and directory-list >> include it?) >> >> On my Windows 7 PC at home, directory-list finds java.exe, but still >> lists a hundred plus fewer files than appear via DIR: >> >> > (length (directory-list "C:\\Windows\\System32")) >> 2389 >> >> C:\Windows\System32>DIR >> 2720 File(s) ... >> 91 Dir(s) ... >> >> I'm stumped. I even tried to track directory-list to its source, >> but lost the scent in pre-base.rkt. >> >> What am I missing here? Is this a potential problem with these >> functions in Windows 7 and 8, or am I perhaps using them incorrectly? >> >> Thanks, >> - Tim >> >> ____________________ >> Racket Users list: >> http://lists.racket-lang.org/users >> >> > > > -- > Jay McCarthy <j...@cs.byu.edu> > Assistant Professor / Brigham Young University > http://faculty.cs.byu.edu/~jay > > "The glory of God is Intelligence" - D&C 93 >
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