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Index: lib/libopenbsd/getdtablecount.c
===================================================================
--- /dev/null
+++ lib/libopenbsd/getdtablecount.c
@@ -0,0 +1,87 @@
+/*-
+ * Copyright (c) 2015 Craig Rodrigues
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/user.h>
+#include <sys/sysctl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+
+int getdtablecount(void);
+
+/*
+ * Return the count of open file descriptors for this process.
+ *
+ */
+int
+getdtablecount(void)
+{
+ int mib[4];
+ int error;
+ int cnt;
+ pid_t pid;
+ size_t len;
+ char *buf, *bp, *eb;
+ struct kinfo_file *kf;
+
+ len = 0;
+ pid = getpid();
+ mib[0] = CTL_KERN;
+ mib[1] = KERN_PROC;
+ mib[2] = KERN_PROC_FILEDESC;
+ mib[3] = pid;
+
+ error = sysctl(mib, 4, NULL, &len, NULL, 0);
+ if (error)
+ return (-1);
+ len = len * 4 / 3;
+ buf = malloc(len);
+ if (buf == NULL)
+ return (-1);
+ error = sysctl(mib, 4, buf, &len, NULL, 0);
+ if (error) {
+ free(buf);
+ return (-1);
+ }
+ /* count items */
+ cnt = 0;
+ bp = buf;
+ eb = buf + len;
+ while (bp < eb) {
+ kf = (struct kinfo_file *)(uintptr_t)bp;
+ if (kf->kf_structsize == 0)
+ break;
+ bp += kf->kf_structsize;
+ cnt++;
+ }
+ free(buf);
+ return (cnt);
+}

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