What makes a valid Windows file name?

re: What makes a valid Windows file name?

Aspirer — Tue, 20 Jan 2004 04:55:00 GMT

You got a blog fan allready. I will put a link to your blog soon:)). and thanks for the pretty handy tips.

re: What makes a valid Windows file name?

ericnewton76.at.hotmail.com — Wed, 21 Jan 2004 21:54:00 GMT

Why does the POSIX subsystem get longer max paths? I've had an issue where an open FTP site was letting hackers/freakers/whatever store movie files on the ftp (nt-ftp hosted). They essentially created files that to this day i wasnt able to delete without reformatting the drive... and I couldnt just leave them because it was a ripped Spiderman movie (a couple of days before it actually came out) and occupied 1.2GB, times 5 for the 4 other movies.

It was the most absurd thing that explorer couldn't delete a file, in the file system. and "del spiderman*" wouldnt work either...

re: What makes a valid Windows file name?

billg — Thu, 22 Apr 2004 17:03:00 GMT

ya da da

ya da da-dah!

ya da da

ya da da-dah!

windows, so broken, why do I bother?

windows, so broken, why do we care?

re: What makes a valid Windows file name?

rmorris — Tue, 15 Jun 2004 04:57:00 GMT

Hey all, this is great information. I was wondering if anyone reading this has knowledge that could help me with a problem I'm having.

I'm developing a file-based settings system for an application I'm writing. To support multiple windows user accounts, I'm creating a separate file for each user (ie WinXP profiles) in a shared directory.

To do this, I'm creating a "<user name>.dat" file. The problem I'm having is, some windows user names (as returned from GetUserName() in the Win32 api) are invalid file names. Any ideas? I can take invalid chars and "safe" them, eg "bob*foo" -> "bob_foo". But I'm not sure what characters I need to safe.

Other ideas?

re: What makes a valid Windows file name?

Paul — Thu, 17 Jun 2004 09:59:00 GMT

FYI, the system puts a lot more restrictions on valid file names than is mentioned above or listed in the Windows book. I don't have time to go into it in any detail, though.

re: What makes a valid Windows file name?

Trey wacker — Tue, 20 Jul 2004 03:23:00 GMT

cute euphemism, "Due to the layering of Windows architecture"

re: What makes a valid Windows file name?

Broken Molds — Sun, 01 Aug 2004 09:47:00 GMT

rmorris,

Any easy solution to your delima is to create a 32-bit hash from the user name, and use that for your file name. MD5 would work great for this.

-Jason

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