From b6a89d8bac142d63927a842dbd7e470e8260e495 Mon Sep 17 00:00:00 2001
From: Marc Teitelbaum <marc@ucbvax.Berkeley.EDU>
Date: Fri, 29 Jun 1990 07:15:34 -0800
Subject: [PATCH] use kvm library

SCCS-vsn: lib/libc/gen/getloadavg.c 6.2
---
 usr/src/lib/libc/gen/getloadavg.c | 57 +++++++++++--------------------
 1 file changed, 20 insertions(+), 37 deletions(-)

diff --git a/usr/src/lib/libc/gen/getloadavg.c b/usr/src/lib/libc/gen/getloadavg.c
index 5bbaaf8769..cd43944d0e 100644
--- a/usr/src/lib/libc/gen/getloadavg.c
+++ b/usr/src/lib/libc/gen/getloadavg.c
@@ -1,33 +1,18 @@
-/*
+/*-
  * Copyright (c) 1989 The Regents of the University of California.
  * All rights reserved.
  *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by the University of California, Berkeley.  The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ * %sccs.include.redist.c%
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static char sccsid[] = "@(#)getloadavg.c	6.1 (Berkeley) %G%";
-#endif LIBC_SCCS and not lint
+static char sccsid[] = "@(#)getloadavg.c	6.2 (Berkeley) %G%";
+#endif /* LIBC_SCCS and not lint */
 
 #include <sys/param.h>
 #include <sys/types.h>
 #include <sys/file.h>
-
 #include <nlist.h>
-#include <paths.h>
-
-static char *kmem = _PATH_KMEM;
-static char *vmunix = _PATH_UNIX;
 
 static struct nlist nl[] = {
 	{ "_averunnable" },
@@ -47,38 +32,36 @@ getloadavg(loadavg, nelem)
 	double loadavg[];
 	int nelem;
 {
-	off_t lseek();
 	static int need_nlist = 1;
 	fixpt_t	averunnable[3];
 	int fscale, kmemfd, i;
+	int alreadyopen;
 
-	/* nlist() is slow; cache result */
+	if ((alreadyopen = kvm_openfiles(NULL, NULL, NULL)) == -1)
+		return (-1);
+	/* 
+	 * cache nlist 
+	 */
 	if (need_nlist) {
-		if (nlist(vmunix, nl) != 0)
-			return (-1);
-		if (nl[X_AVERUNNABLE].n_type == 0 || nl[X_FSCALE].n_type == 0)
-			return (-1);
+		if (kvm_nlist(nl) != 0)
+			goto bad;
 		need_nlist = 0;
 	}
-
-	if ((kmemfd = open(kmem, O_RDONLY, 0)) < 0)
-		return (-1);
-	if (lseek(kmemfd, (off_t)nl[X_AVERUNNABLE].n_value, L_SET) == -1)
-		goto bad;
-	if (read(kmemfd, (char *)averunnable, sizeof(averunnable)) < 0)
+	if (kvm_read((off_t)nl[X_AVERUNNABLE].n_value, (char *)averunnable, 
+	    sizeof(averunnable)) != sizeof(averunnable))
 		goto bad;
-	if (lseek(kmemfd, (off_t)nl[X_FSCALE].n_value, L_SET) == -1)
+	if (kvm_read( (off_t)nl[X_FSCALE].n_value, (char *)&fscale, 
+	    sizeof(fscale)) != sizeof(fscale))
 		goto bad;
-	if (read(kmemfd, (char *)&fscale, sizeof(fscale)) < 0)
-		goto bad;
-	(void) close(kmemfd);
-
 	nelem = MIN(nelem, sizeof(averunnable) / sizeof(averunnable[0]));
 	for (i = 0; i < nelem; i++)
 		loadavg[i] = (double) averunnable[i] / fscale;
+	if (!alreadyopen)
+		kvm_close();
 	return (nelem);
 
 bad:
-	(void) close(kmemfd);
+	if (!alreadyopen)
+		kvm_close();
 	return (-1);
 }
-- 
2.20.1