1*1bbc47cbSCraig Rodrigues /*-
2*1bbc47cbSCraig Rodrigues * Copyright (c) 2015 Craig Rodrigues
3*1bbc47cbSCraig Rodrigues * All rights reserved.
4*1bbc47cbSCraig Rodrigues *
5*1bbc47cbSCraig Rodrigues * Redistribution and use in source and binary forms, with or without
6*1bbc47cbSCraig Rodrigues * modification, are permitted provided that the following conditions
7*1bbc47cbSCraig Rodrigues * are met:
8*1bbc47cbSCraig Rodrigues * 1. Redistributions of source code must retain the above copyright
9*1bbc47cbSCraig Rodrigues * notice, this list of conditions and the following disclaimer.
10*1bbc47cbSCraig Rodrigues * 2. Redistributions in binary form must reproduce the above copyright
11*1bbc47cbSCraig Rodrigues * notice, this list of conditions and the following disclaimer in the
12*1bbc47cbSCraig Rodrigues * documentation and/or other materials provided with the distribution.
13*1bbc47cbSCraig Rodrigues *
14*1bbc47cbSCraig Rodrigues * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15*1bbc47cbSCraig Rodrigues * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16*1bbc47cbSCraig Rodrigues * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17*1bbc47cbSCraig Rodrigues * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18*1bbc47cbSCraig Rodrigues * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19*1bbc47cbSCraig Rodrigues * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20*1bbc47cbSCraig Rodrigues * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21*1bbc47cbSCraig Rodrigues * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22*1bbc47cbSCraig Rodrigues * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23*1bbc47cbSCraig Rodrigues * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24*1bbc47cbSCraig Rodrigues * SUCH DAMAGE.
25*1bbc47cbSCraig Rodrigues */
26*1bbc47cbSCraig Rodrigues
27*1bbc47cbSCraig Rodrigues #include <sys/types.h>
28*1bbc47cbSCraig Rodrigues #include <sys/sysctl.h>
29*1bbc47cbSCraig Rodrigues #include <stddef.h>
30*1bbc47cbSCraig Rodrigues
31*1bbc47cbSCraig Rodrigues int getdtablecount(void);
32*1bbc47cbSCraig Rodrigues
33*1bbc47cbSCraig Rodrigues /*
34*1bbc47cbSCraig Rodrigues * Return the count of open file descriptors for this process.
35*1bbc47cbSCraig Rodrigues *
36*1bbc47cbSCraig Rodrigues */
37*1bbc47cbSCraig Rodrigues int
getdtablecount(void)38*1bbc47cbSCraig Rodrigues getdtablecount(void)
39*1bbc47cbSCraig Rodrigues {
40*1bbc47cbSCraig Rodrigues int mib[4];
41*1bbc47cbSCraig Rodrigues int error;
42*1bbc47cbSCraig Rodrigues int nfds;
43*1bbc47cbSCraig Rodrigues size_t len;
44*1bbc47cbSCraig Rodrigues
45*1bbc47cbSCraig Rodrigues len = sizeof(nfds);
46*1bbc47cbSCraig Rodrigues mib[0] = CTL_KERN;
47*1bbc47cbSCraig Rodrigues mib[1] = KERN_PROC;
48*1bbc47cbSCraig Rodrigues mib[2] = KERN_PROC_NFDS;
49*1bbc47cbSCraig Rodrigues mib[3] = 0;
50*1bbc47cbSCraig Rodrigues
51*1bbc47cbSCraig Rodrigues error = sysctl(mib, 4, &nfds, &len, NULL, 0);
52*1bbc47cbSCraig Rodrigues if (error)
53*1bbc47cbSCraig Rodrigues return (-1);
54*1bbc47cbSCraig Rodrigues return (nfds);
55*1bbc47cbSCraig Rodrigues }
56