1 files changed, 89 insertions, 0 deletions
diff --git a/tools/regression/priv/priv_sysctl_write.c b/tools/regression/priv/priv_sysctl_write.c
new file mode 100644
index 0000000..becff06
--- /dev/null
+++ b/tools/regression/priv/priv_sysctl_write.c
@@ -0,0 +1,89 @@
+/*-
+ * Copyright (c) 2006 nCircle Network Security, Inc.
+ * All rights reserved.
+ *
+ * This software was developed by Robert N. M. Watson for the TrustedBSD
+ * Project under contract to nCircle Network Security, 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.
+ *
+ * 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, NCIRCLE NETWORK SECURITY,
+ * INC., 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Test that sysctls can only be written with privilege by trying first with,
+ * then without privilege.  Do this by first reading, then setting the
+ * hostname as a no-op.
+ */
+
+#include <sys/types.h>
+#include <sys/sysctl.h>
+
+#include <err.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "main.h"
+
+#define KERN_HOSTNAME_STRING	"kern.hostname"
+
+void
+priv_sysctl_write(void)
+{
+	char buffer[1024];
+	size_t len;
+	int error;
+
+	assert_root();
+
+	/*
+	 * First query the current value.
+	 */
+	len = sizeof(buffer);
+	error = sysctlbyname(KERN_HOSTNAME_STRING, buffer, &len, NULL, 0);
+	if (error)
+		err(-1, "sysctlbyname(\"%s\") query", KERN_HOSTNAME_STRING);
+
+	/*
+	 * Now try to set with privilege.
+	 */
+	error = sysctlbyname(KERN_HOSTNAME_STRING, NULL, NULL, buffer,
+	    strlen(buffer));
+	if (error)
+		err(-1, "sysctlbyname(\"%s\") set as root",
+		    KERN_HOSTNAME_STRING);
+
+	/*
+	 * Now without privilege.
+	 */
+	set_euid(UID_OTHER);
+
+	error = sysctlbyname(KERN_HOSTNAME_STRING, NULL, NULL, buffer,
+	    strlen(buffer));
+	if (error == 0)
+		errx(-1, "sysctlbyname(\"%s\") succeeded as !root",
+		    KERN_HOSTNAME_STRING);
+	if (errno != EPERM)
+		err(-1, "sysctlbyname(\"%s\") wrong errno %d",
+		    KERN_HOSTNAME_STRING, errno);
+}