1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright 2020 Scott Long <[email protected]> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 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. 14 * 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 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/types.h> 32 #include <sys/errno.h> 33 #include <sys/sysctl.h> 34 #include <stdlib.h> 35 #include <paths.h> 36 #include <libutil.h> 37 #include <string.h> 38 #include <unistd.h> 39 40 ssize_t 41 getlocalbase(char *path, size_t pathlen) 42 { 43 size_t tmplen; 44 const char *tmppath; 45 46 if ((pathlen == 0) || (path == NULL)) { 47 errno = EINVAL; 48 return (-1); 49 } 50 51 tmppath = NULL; 52 tmplen = pathlen; 53 if (issetugid() == 0) 54 tmppath = getenv("LOCALBASE"); 55 56 if ((tmppath == NULL) && 57 (sysctlbyname("user.localbase", path, &tmplen, NULL, 0) == 0)) { 58 return (tmplen); 59 } 60 61 if (tmppath == NULL) 62 #ifdef _PATH_LOCALBASE 63 tmppath = _PATH_LOCALBASE; 64 #else 65 tmppath = "/usr/local"; 66 #endif 67 68 tmplen = strlcpy(path, tmppath, pathlen); 69 if ((tmplen < 0) || (tmplen >= (ssize_t)pathlen)) { 70 errno = ENOMEM; 71 tmplen = -1; 72 } 73 74 return (tmplen); 75 } 76