Re: [racket-dev] sandbox and file-/directory-existence tests

2013-08-19 Thread Sam Tobin-Hochstadt
On Mon, Aug 19, 2013 at 4:34 PM, Matthew Flatt mfl...@cs.utah.edu wrote: Is there a situation where allowing an arbitrary file- or directory-existence test would be bad? This all depends on how paranoid we want to be. There are certainly situations when this will be bad -- it lets you

Re: [racket-dev] sandbox and file-/directory-existence tests

2013-08-19 Thread Eli Barzilay
A few minutes ago, Sam Tobin-Hochstadt wrote: On Mon, Aug 19, 2013 at 4:34 PM, Matthew Flatt mfl...@cs.utah.edu wrote: Is there a situation where allowing an arbitrary file- or directory-existence test would be bad? This all depends on how paranoid we want to be. There are certainly

Re: [racket-dev] sandbox and file-/directory-existence tests

2013-08-19 Thread Matthew Flatt
Thanks! Instead of changing 'exists permissions, I think I found the right approach to moving the computation so that it doesn't interact with the sandboxes. At Mon, 19 Aug 2013 16:49:28 -0400, Eli Barzilay wrote: A few minutes ago, Sam Tobin-Hochstadt wrote: On Mon, Aug 19, 2013 at 4:34 PM,