1 files changed, 75 insertions, 0 deletions

diff --git a/lib/libutil/getlocalbase.c b/lib/libutil/getlocalbase.c
new file mode 100644
index 000000000000..88cf3f472d9c
--- /dev/null
+++ b/lib/libutil/getlocalbase.c
@@ -0,0 +1,75 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright 2020 Scott Long <scottl@freebsd.org>
+ *
+ * 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 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <sys/errno.h>
+#include <sys/sysctl.h>
+#include <stdlib.h>
+#include <paths.h>
+#include <libutil.h>
+#include <string.h>
+#include <unistd.h>
+
+ssize_t
+getlocalbase(char *path, size_t pathlen)
+{
+	size_t tmplen;
+	const char *tmppath;
+
+	if ((pathlen == 0) || (path == NULL)) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	tmppath = NULL;
+	tmplen = pathlen;
+	if (issetugid() == 0)
+		tmppath = getenv("LOCALBASE");
+
+	if ((tmppath == NULL) &&
+	    (sysctlbyname("user.localbase", path, &tmplen, NULL, 0) == 0)) {
+		return (tmplen);
+	}
+
+	if (tmppath == NULL)
+#ifdef _PATH_LOCALBASE
+		tmppath = _PATH_LOCALBASE;
+#else
+		tmppath = "/usr/local";
+#endif
+
+	tmplen = strlcpy(path, tmppath, pathlen);
+	if ((tmplen < 0) || (tmplen >= (ssize_t)pathlen)) {
+		errno = ENOMEM;
+		tmplen = -1;
+	}
+
+	return (tmplen);
+}