On Sat, 09 Mar 2013 13:44:44 -0500, Lars T. Kyllingstad
<pub...@kyllingen.net> wrote:
On Saturday, 9 March 2013 at 18:35:25 UTC, Steven Schveighoffer wrote:
How do you loop over all open ones? Just curious :)
You don't. That is why I said solution (3) sucks too. :) You have to
loop over all possible non-std file descriptors, i.e. from 3 to the
maximum number of open files. (On my Ubuntu installation, this is by
default 1024, but may be as much as 4096. I don't know about other
*NIXes)
Here is how to do it:
import core.sys.posix.unistd, core.sys.posix.sys.resource;
rlimit r;
getrlimit(RLIMIT_NOFILE, &r);
for (int i = 0; i < r.rlim_cur; ++i)
close(i);
Hm... don't close 0, 1, 2 :)
On Linux at least, you could use /proc/self/fd I suppose it's faster just
to loop though.
How long does it take when you close non-open descriptors? We don't want
to hamper performance too much.
I wonder if select on all possible file descriptors in the fd_err
parameter would give you a clue as to which were invalid.
-Steve
