1 files changed, 86 insertions, 0 deletions
diff --git a/lib/libcapsicum/libcapsicum_sysctl.c b/lib/libcapsicum/libcapsicum_sysctl.c
new file mode 100644
index 0000000..3f1ccd9
--- /dev/null
+++ b/lib/libcapsicum/libcapsicum_sysctl.c
@@ -0,0 +1,86 @@
+/*-
+ * Copyright (c) 2013 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Pawel Jakub Dawidek under sponsorship from
+ * the FreeBSD Foundation.
+ *
+ * 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 AUTHORS 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 AUTHORS 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>
+__FBSDID("$FreeBSD$");
+
+#include <sys/nv.h>
+
+#include <errno.h>
+#include <string.h>
+
+#include "libcapsicum.h"
+#include "libcapsicum_sysctl.h"
+
+int
+cap_sysctlbyname(cap_channel_t *chan, const char *name, void *oldp,
+    size_t *oldlenp, const void *newp, size_t newlen)
+{
+	nvlist_t *nvl;
+	const uint8_t *retoldp;
+	uint8_t operation;
+	size_t oldlen;
+
+	operation = 0;
+	if (oldp != NULL)
+		operation |= CAP_SYSCTL_READ;
+	if (newp != NULL)
+		operation |= CAP_SYSCTL_WRITE;
+
+	nvl = nvlist_create(0);
+	nvlist_add_string(nvl, "cmd", "sysctl");
+	nvlist_add_string(nvl, "name", name);
+	nvlist_add_number(nvl, "operation", (uint64_t)operation);
+	if (oldp == NULL && oldlenp != NULL)
+		nvlist_add_null(nvl, "justsize");
+	else if (oldlenp != NULL)
+		nvlist_add_number(nvl, "oldlen", (uint64_t)*oldlenp);
+	if (newp != NULL)
+		nvlist_add_binary(nvl, "newp", newp, newlen);
+	nvl = cap_xfer_nvlist(chan, nvl, 0);
+	if (nvl == NULL)
+		return (-1);
+	if (nvlist_get_number(nvl, "error") != 0) {
+		errno = (int)nvlist_get_number(nvl, "error");
+		nvlist_destroy(nvl);
+		return (-1);
+	}
+
+	if (oldp == NULL && oldlenp != NULL) {
+		*oldlenp = (size_t)nvlist_get_number(nvl, "oldlen");
+	} else if (oldp != NULL) {
+		retoldp = nvlist_get_binary(nvl, "oldp", &oldlen);
+		memcpy(oldp, retoldp, oldlen);
+		if (oldlenp != NULL)
+			*oldlenp = oldlen;
+	}
+	nvlist_destroy(nvl);
+
+	return (0);
+}