On Wed, Sep 1, 2010 at 4:20 AM, Dave Keck <davek...@gmail.com> wrote: >> descriptors are open. On OS X, you could read the contents of /dev/fd/ >> to accomplish the same thing. It appears that NSTask uses the uglier >> getdbtablesize() loop though. > > Neat, I wasn't aware of /dev/fd. Are the necessary APIs > async-signal-safe so they can be used between fork()/exec()?
Good question. I couldn't find a way to list the contents of that directory using only safe APIs. You'd have to do it by execing a small helper and then reading its output, which is terrible, or by execing a small helper that can both close all open descriptors AND then exec the thing you really want to exec. Unless there's some way to list the contents of a directory that I couldn't find. > Apparently getdbtablesize() isn't even documented as being so; in the > strictest sense then, I guess you'd have to use you'd have to use > INT_MAX. Hah. I'm going to guess that the set of async signal safe calls is somewhat larger than documented.... Should probably file a bug against NSTask just in case, though. :) Mike _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
