1 /*
2  * Copyright (c) 2017 Nicholas Marriott <nicholas.marriott@gmail.com>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
13  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
14  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <sys/types.h>
18 
19 #include <glob.h>
20 #include <unistd.h>
21 
22 void fatal(const char *, ...);
23 void fatalx(const char *, ...);
24 
25 #ifdef HAVE_PROC_PID
26 int
27 getdtablecount(void)
28 {
29 	char	path[PATH_MAX];
30 	glob_t	g;
31 	int	n = 0;
32 
33 	if (snprintf(path, sizeof path, "/proc/%ld/fd/*", (long)getpid()) < 0) {
34 		fprintf(stderr, "snprintf overflow");
35 		exit (1);
36 	}
37 	if (glob(path, 0, NULL, &g) == 0)
38 		n = g.gl_pathc;
39 	globfree(&g);
40 	return (n);
41 }
42 #else
43 int
44 getdtablecount(void)
45 {
46 	return (0);
47 }
48 #endif