/*- * 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 <sys/limits.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 >= pathlen)) { errno = ENOMEM; return (-1); } /* It's unlikely that the buffer would be this big */ if (tmplen >= SSIZE_MAX) { errno = ENOMEM; return (-1); } return ((ssize_t)tmplen); }