[Midnightbsd-cvs] src [10503] trunk/lib/libutil/kinfo_getvmobject.c: add getvmobject

[laffer1 at midnightbsd.org]

Revision: 10503
          http://svnweb.midnightbsd.org/src/?rev=10503
Author:   laffer1
Date:     2018-06-06 21:46:18 -0400 (Wed, 06 Jun 2018)
Log Message:
-----------
add getvmobject

Added Paths:
-----------
    trunk/lib/libutil/kinfo_getvmobject.c

Added: trunk/lib/libutil/kinfo_getvmobject.c
===================================================================
--- trunk/lib/libutil/kinfo_getvmobject.c	                        (rev 0)
+++ trunk/lib/libutil/kinfo_getvmobject.c	2018-06-07 01:46:18 UTC (rev 10503)
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2013 Hudson River Trading LLC
+ * Written by: John H. Baldwin <jhb at FreeBSD.org>
+ * 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>
+__MBSDID("$MidnightBSD$");
+
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#include <sys/user.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "libutil.h"
+
+struct kinfo_vmobject *
+kinfo_getvmobject(int *cntp)
+{
+	char *buf, *bp, *ep;
+	struct kinfo_vmobject *kvo, *list, *kp;
+	size_t len;
+	int cnt, i;
+
+	buf = NULL;
+	for (i = 0; i < 3; i++) {
+		if (sysctlbyname("vm.objects", NULL, &len, NULL, 0) < 0)
+			return (NULL);
+		buf = reallocf(buf, len);
+		if (buf == NULL)
+			return (NULL);
+		if (sysctlbyname("vm.objects", buf, &len, NULL, 0) == 0)
+			goto unpack;
+		if (errno != ENOMEM) {
+			free(buf);
+			return (NULL);
+		}
+	}
+	free(buf);
+	return (NULL);
+
+unpack:
+	/* Count items */
+	cnt = 0;
+	bp = buf;
+	ep = buf + len;
+	while (bp < ep) {
+		kvo = (struct kinfo_vmobject *)(uintptr_t)bp;
+		bp += kvo->kvo_structsize;
+		cnt++;
+	}
+
+	list = calloc(cnt, sizeof(*list));
+	if (list == NULL) {
+		free(buf);
+		return (NULL);
+	}
+
+	/* Unpack */
+	bp = buf;
+	kp = list;
+	while (bp < ep) {
+		kvo = (struct kinfo_vmobject *)(uintptr_t)bp;
+		memcpy(kp, kvo, kvo->kvo_structsize);
+		bp += kvo->kvo_structsize;
+		kp->kvo_structsize = sizeof(*kp);
+		kp++;
+	}
+	free(buf);
+	*cntp = cnt;
+	return (list);
+}


Property changes on: trunk/lib/libutil/kinfo_getvmobject.c
___________________________________________________________________
Added: svn:eol-style
## -0,0 +1 ##
+native
\ No newline at end of property
Added: svn:keywords
## -0,0 +1 ##
+MidnightBSD=%H
\ No newline at end of property
Added: svn:mime-type
## -0,0 +1 ##
+text/plain
\ No newline at end of property