1 /* Copyright (C) 1991-2017 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
22 #include <hurd/resource.h>
24 /* Return the maximum number of file descriptors the current process
25 could possibly have (until it raises the resource limit). */
27 __getdtablesize (void)
32 __mutex_lock (&_hurd_rlimit_lock
);
33 limit
= _hurd_rlimits
[RLIMIT_NOFILE
].rlim_cur
;
34 __mutex_unlock (&_hurd_rlimit_lock
);
37 /* RLIM_INFINITY is not meaningful to our caller. -1 is a good choice
38 because `sysconf (_SC_OPEN_MAX)' calls us, and -1 from sysconf means
39 "no determinable limit". */
40 return limit
== RLIM_INFINITY
? -1 : (int) limit
;
43 weak_alias (__getdtablesize
, getdtablesize
)