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[FreeBSD/releng/10.2.git] / contrib / ipfilter / lib / kvatoname.c
1 /*      $FreeBSD$       */
2
3 /*
4  * Copyright (C) 2012 by Darren Reed.
5  *
6  * See the IPFILTER.LICENCE file for details on licencing.
7  *
8  * $Id$
9  */
10
11 #include "ipf.h"
12
13 #include <fcntl.h>
14 #include <sys/ioctl.h>
15
16 char *kvatoname(func, iocfunc)
17         ipfunc_t func;
18         ioctlfunc_t iocfunc;
19 {
20         static char funcname[40];
21         ipfunc_resolve_t res;
22         int fd;
23
24         res.ipfu_addr = func;
25         res.ipfu_name[0] = '\0';
26         fd = -1;
27
28         if ((opts & OPT_DONTOPEN) == 0) {
29                 fd = open(IPL_NAME, O_RDONLY);
30                 if (fd == -1)
31                         return NULL;
32         }
33         (void) (*iocfunc)(fd, SIOCFUNCL, &res);
34         if (fd >= 0)
35                 close(fd);
36         strncpy(funcname, res.ipfu_name, sizeof(funcname));
37         funcname[sizeof(funcname) - 1] = '\0';
38         return funcname;
39 }