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authormanu <manu@NetBSD.org>2001-09-16 06:53:54 +0000
committermanu <manu@NetBSD.org>2001-09-16 06:53:54 +0000
commit5a8892e22d50a798efe55bc352bc14351eef206d (patch)
treeb48f8bab749572ecc5fb42397294e8af5dd16df6 /sys/dev
parentadb22920bc1436d50e8c635c7199d654fac8c28a (diff)
This is the clockctl pseudodevice. It gives non root users access to root-only
time-related system calls through ioctls. For instance, if user daemon is able to write to /dev/clockctl, then it is able to use the CLOCKCTL_SETTIMEOFDAY ioctl on it, which will be equivalent to a settimeofday. Approved by Christos
Diffstat (limited to 'sys/dev')
-rw-r--r--sys/dev/clockctl.c134
1 files changed, 134 insertions, 0 deletions
diff --git a/sys/dev/clockctl.c b/sys/dev/clockctl.c
new file mode 100644
index 00000000000..f945322d64b
--- /dev/null
+++ b/sys/dev/clockctl.c
@@ -0,0 +1,134 @@
+/* $NetBSD: clockctl.c,v 1.1 2001/09/16 06:53:56 manu Exp $ */
+
+/*-
+ * Copyright (c) 2001 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Emmanuel Dreyfus.
+ *
+ * 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. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/errno.h>
+#include <sys/ioctl.h>
+#include <sys/device.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#ifdef NTP
+#include <sys/timex.h>
+#endif /* NTP */
+
+#include <sys/clockctl.h>
+
+struct clockctl_softc {
+ struct device clockctl_dev;
+};
+
+
+void
+clockctlattach(parent, self, aux)
+ struct device *self;
+ struct device *parent;
+ void *aux;
+{
+ /* Nothing to set up before open is called */
+ return;
+}
+
+int
+clockctlopen(dev, flags, fmt, p)
+ dev_t dev;
+ int flags, fmt;
+ struct proc *p;
+{
+ return 0;
+}
+
+int
+clockctlclose(dev, flags, fmt, p)
+ dev_t dev;
+ int flags, fmt;
+ struct proc *p;
+{
+ return 0;
+}
+
+int
+clockctlioctl(dev, cmd, data, flags, p)
+ dev_t dev;
+ u_long cmd;
+ caddr_t data;
+ int flags;
+ struct proc *p;
+{
+ int error = 0;
+
+ switch (cmd) {
+ case CLOCKCTL_SETTIMEOFDAY: {
+ struct clockctl_settimeofday_args *args =
+ (struct clockctl_settimeofday_args *)&data;
+
+ error = settimeofday1(&args->tv, &args->tzp, p);
+ if (error)
+ return (error);
+ break;
+ }
+ case CLOCKCTL_ADJTIME: {
+ struct clockctl_adjtime_args *args =
+ (struct clockctl_adjtime_args *)&data;
+
+ error = adjtime1(&args->delta, &args->olddelta, p);
+ if (error)
+ return (error);
+ break;
+ }
+ case CLOCKCTL_CLOCK_SETTIME: {
+ struct clockctl_clock_settime_args *args =
+ (struct clockctl_clock_settime_args *)&data;
+
+ error = clock_settime1(args->clock_id, &args->tp);
+ if (error)
+ return (error);
+ break;
+ }
+#ifdef NTP
+ case CLOCKCTL_NTP_ADJTIME: {
+ struct clockctl_ntp_adjtime_args *args =
+ (struct clockctl_ntp_adjtime_args *)&data;
+
+ (void*)ntp_adjtime1(&args->tp, &error);
+ return (error);
+ }
+#endif /* NTP */
+ default:
+ error = EINVAL;
+ }
+
+ return (error);
+}
+
+