<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META content="text/html; charset=us-ascii" http-equiv=Content-Type> <META name=GENERATOR content="MSHTML 9.00.8112.16455"></HEAD> <BODY> <DIV dir=ltr align=left><FONT face=Arial><FONT color=#0000ff><FONT size=2>(directory-exists? "C:\\Windows\\System32")<SPAN class=244530223-06122012> -> #t</SPAN></FONT></FONT></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN class=244530223-06122012>(file-exists? "C:\\Windows\\System32") -> #f</SPAN></FONT></FONT></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN class=244530223-06122012></SPAN></FONT></FONT></FONT> </DIV> <DIV dir=ltr align=left><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN class=244530223-06122012><FONT color=#000000 size=3 face="Times New Roman">You wrote: "(Yes, </FONT>Windows 8, please don't laugh at me. :-) )"</SPAN></FONT></FONT></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN class=244530223-06122012>I am laughing to myself, for I use windows 7 and windows XP :)</SPAN></FONT></FONT></FONT></DIV> <DIV dir=ltr align=left><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN class=244530223-06122012></SPAN></FONT></FONT></FONT> </DIV> <DIV dir=ltr align=left><FONT face=Arial><FONT color=#0000ff><FONT size=2><SPAN class=244530223-06122012>Jos</SPAN></FONT></FONT></FONT></DIV> <DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial></FONT> </DIV><BR> <DIV dir=ltr lang=en-us class=OutlookMessageHeader align=left> <HR tabIndex=-1> <FONT size=2 face=Tahoma><B>From:</B> users-bounces@racket-lang.org [mailto:users-bounces@racket-lang.org] <B>On Behalf Of </B>Tim Nelson<BR><B>Sent:</B> jueves, 06 de diciembre de 2012 23:13<BR><B>To:</B> users@racket-lang.org<BR><B>Subject:</B> [racket] Behavior of file-exists? and directory-list<BR></FONT><BR></DIV> <DIV></DIV> <DIV> <DIV>Dear Benevolent Racketeers,</DIV> <DIV><BR></DIV> <DIV>I just installed DrRacket 5.3.1 on my Windows 8 Laptop. (Yes,</DIV> <DIV>Windows 8, please don't laugh at me. :-) ) I have not checked</DIV> <DIV>this on other operating systems or other versions of Racket.</DIV> <DIV><BR></DIV> <DIV>One of my Racket projects scans the PATH directories to locate</DIV> <DIV>the Java executable, if one is installed. I have the</DIV> <DIV>executable "java.exe" present in the C:\Windows\System32 folder,</DIV> <DIV>yet:</DIV> <DIV><BR></DIV> <DIV>> (file-exists? "C:\\Windows\\System32")</DIV> <DIV>#f</DIV> <DIV><BR></DIV> <DIV>To check myself, I invoked and manually scanned</DIV> <DIV>down (directory-list "C:\\Windows\\System32"), expecting to see</DIV> <DIV>#<path:java.exe> but did not.</DIV> <DIV><BR></DIV> <DIV>Moreover, counting hidden files and subfolders, I had 3576 files</DIV> <DIV>in that folder (confirmed via command prompt, not recursive). If</DIV> <DIV>I don't include hidden files, I have 3238. But:</DIV> <DIV><BR></DIV> <DIV>> (length (directory-list "C:\\Windows\\System32"))</DIV> <DIV>2739</DIV> <DIV><BR></DIV> <DIV>So it appears that (directory-list) is missing several hundred</DIV> <DIV>files that actually exist, including java.exe. java.exe is not</DIV> <DIV>hidden, not read-only, and it's not obviously a link. (And </DIV> <DIV>even if it was, shouldn't file-exists? and directory-list </DIV> <DIV>include it?)</DIV> <DIV><BR></DIV> <DIV>On my Windows 7 PC at home, directory-list finds java.exe, but still </DIV> <DIV>lists a hundred plus fewer files than appear via DIR:</DIV> <DIV><BR></DIV> <DIV> <DIV>> (length (directory-list "C:\\Windows\\System32"))</DIV> <DIV>2389</DIV></DIV> <DIV><BR></DIV> <DIV>C:\Windows\System32>DIR</DIV> <DIV>2720 File(s) ... </DIV> <DIV>91 Dir(s) ...</DIV> <DIV><BR></DIV> <DIV>I'm stumped. I even tried to track directory-list to its source,</DIV> <DIV>but lost the scent in pre-base.rkt.</DIV> <DIV><BR></DIV> <DIV>What am I missing here? Is this a potential problem with these</DIV> <DIV>functions in Windows 7 and 8, or am I perhaps using them incorrectly?</DIV> <DIV><BR></DIV> <DIV>Thanks,</DIV> <DIV>- Tim</DIV></DIV></BODY></HTML>