initial import of NetBSD tree

1 files changed, 77 insertions, 0 deletions

diff --git a/lib/libc/gen/getloadavg.c b/lib/libc/gen/getloadavg.c
new file mode 100644
index 00000000000..37283dc75f5
--- /dev/null
+++ b/lib/libc/gen/getloadavg.c
@@ -0,0 +1,77 @@
+/*	$NetBSD: getloadavg.c,v 1.5 1995/02/25 08:51:15 cgd Exp $	*/
+
+/*-
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)getloadavg.c	8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: getloadavg.c,v 1.5 1995/02/25 08:51:15 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/sysctl.h>
+#include <vm/vm_param.h>
+
+#include <stdlib.h>
+
+/*
+ * getloadavg() -- Get system load averages.
+ *
+ * Put `nelem' samples into `loadavg' array.
+ * Return number of samples retrieved, or -1 on error.
+ */
+int
+getloadavg(loadavg, nelem)
+	double loadavg[];
+	int nelem;
+{
+	struct loadavg loadinfo;
+	int i, mib[2];
+	size_t size;
+
+	mib[0] = CTL_VM;
+	mib[1] = VM_LOADAVG;
+	size = sizeof(loadinfo);
+	if (sysctl(mib, 2, &loadinfo, &size, NULL, 0) < 0)
+		return (-1);
+
+	nelem = MIN(nelem, sizeof(loadinfo.ldavg) / sizeof(fixpt_t));
+	for (i = 0; i < nelem; i++)
+		loadavg[i] = (double) loadinfo.ldavg[i] / loadinfo.fscale;
+	return (nelem);
+}