2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright 2020 Stefan Eßer <se@freebsd.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 #include <sys/param.h>
30 #include <sys/sysctl.h>
31 #include <sys/limits.h>
38 #ifndef LOCALBASE_PATH
39 #define LOCALBASE_PATH _PATH_LOCALBASE
42 #ifndef LOCALBASE_CTL_LEN
43 #define LOCALBASE_CTL_LEN MAXPATHLEN
46 /* Any prefix guaranteed to not be the start of a valid path name */
47 #define ILLEGAL_PREFIX "/dev/null/"
52 #if LOCALBASE_CTL_LEN > 0
53 int localbase_oid[2] = {CTL_USER, USER_LOCALBASE};
54 static char localpath[LOCALBASE_CTL_LEN];
55 size_t localpathlen = LOCALBASE_CTL_LEN;
58 static const char *localbase = NULL;
60 if (localbase != NULL)
63 if (issetugid() == 0) {
64 tmppath = getenv("LOCALBASE");
65 if (tmppath != NULL && tmppath[0] != '\0') {
71 #if LOCALBASE_CTL_LEN > 0
72 if (sysctl(localbase_oid, 2, localpath, &localpathlen, NULL, 0) != 0) {
74 localbase = LOCALBASE_PATH;
76 localbase = ILLEGAL_PREFIX;
78 if (localpath[0] != '\0')
79 localbase = localpath;
81 localbase = LOCALBASE_PATH;
84 localbase = LOCALBASE_PATH;