BSD 4.4 Lite Kernel Sources

1 files changed, 116 insertions, 0 deletions

diff --git a/sys/kern/kern_acct.c b/sys/kern/kern_acct.c
new file mode 100644
index 0000000..b752279
--- /dev/null
+++ b/sys/kern/kern_acct.c
@@ -0,0 +1,116 @@
+/*-
+ * Copyright (c) 1982, 1986, 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ * (c) UNIX System Laboratories, Inc.
+ * All or some portions of this file are derived from material licensed
+ * to the University of California by American Telephone and Telegraph
+ * Co. or Unix System Laboratories, Inc. and are reproduced herein with
+ * the permission of UNIX System Laboratories, Inc.
+ *
+ * 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.
+ *
+ *	from: @(#)kern_acct.c	8.1 (Berkeley) 6/14/93
+ */
+
+#include <sys/param.h>
+#include <sys/proc.h>
+#include <sys/mount.h>
+#include <sys/vnode.h>
+#include <sys/file.h>
+#include <sys/syslog.h>
+#include <sys/kernel.h>
+
+struct acct_args {
+	char	*fname;
+};
+acct(a1, a2, a3)
+	struct proc *a1;
+	struct acct_args *a2;
+	int *a3;
+{
+	/*
+	 * Body deleted.
+	 */
+	return (ENOSYS);
+}
+
+acct_process(a1)
+	struct proc *a1;
+{
+
+	/*
+	 * Body deleted.
+	 */
+	return;
+}
+
+/*
+ * Periodically check the file system to see if accounting
+ * should be turned on or off.
+ */
+
+/*
+ * Values associated with enabling and disabling accounting
+ */
+int	acctsuspend = 2;	/* stop accounting when < 2% free space left */
+int	acctresume = 4;		/* resume when free space risen to > 4% */
+int	acctchkfreq = 15;	/* frequency (in seconds) to check space */
+
+/*
+ * SHOULD REPLACE THIS WITH A DRIVER THAT CAN BE READ TO SIMPLIFY.
+ */
+struct	vnode *acctp;
+struct	vnode *savacctp;
+
+/* ARGSUSED */
+void
+acctwatch(a)
+	void *a;
+{
+	struct statfs sb;
+
+	if (savacctp) {
+		(void)VFS_STATFS(savacctp->v_mount, &sb, (struct proc *)0);
+		if (sb.f_bavail > acctresume * sb.f_blocks / 100) {
+			acctp = savacctp;
+			savacctp = NULL;
+			log(LOG_NOTICE, "Accounting resumed\n");
+		}
+	} else {
+		if (acctp == NULL)
+			return;
+		(void)VFS_STATFS(acctp->v_mount, &sb, (struct proc *)0);
+		if (sb.f_bavail <= acctsuspend * sb.f_blocks / 100) {
+			savacctp = acctp;
+			acctp = NULL;
+			log(LOG_NOTICE, "Accounting suspended\n");
+		}
+	}
+	timeout(acctwatch, NULL, acctchkfreq * hz);
+}