/* $NetBSD: citrus_module.c,v 1.9 2009/01/11 02:46:24 christos Exp $ */ /*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c)1999, 2000, 2001, 2002 Citrus Project, * All rights reserved. * * 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 AUTHOR 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 AUTHOR 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. */ /*- * Copyright (c) 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Paul Kranenburg. * * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /*- * Copyright (c) 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Paul Borman at Krystal Technologies. * * 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. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * 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/types.h> #include <assert.h> #include <dirent.h> #include <dlfcn.h> #include <errno.h> #include <limits.h> #include <paths.h> #include <stdbool.h> #include <stddef.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #define I18NMODULE_MAJOR 5 #include "citrus_namespace.h" #include "citrus_bcs.h" #include "citrus_module.h" #include "libc_private.h" static int _getdewey(int[], char *); static int _cmpndewey(int[], int, int[], int); static const char *_findshlib(char *, int *, int *); static const char *_pathI18nModule = NULL; /* from libexec/ld.aout_so/shlib.c */ #undef major #undef minor #define MAXDEWEY 3 /*ELF*/ static int _getdewey(int dewey[], char *cp) { int i, n; for (n = 0, i = 0; i < MAXDEWEY; i++) { if (*cp == '\0') break; if (*cp == '.') cp++; if (*cp < '0' || '9' < *cp) return (0); dewey[n++] = (int)_bcs_strtol(cp, &cp, 10); } return (n); } /* * Compare two dewey arrays. * Return -1 if `d1' represents a smaller value than `d2'. * Return 1 if `d1' represents a greater value than `d2'. * Return 0 if equal. */ static int _cmpndewey(int d1[], int n1, int d2[], int n2) { int i; for (i = 0; i < n1 && i < n2; i++) { if (d1[i] < d2[i]) return (-1); if (d1[i] > d2[i]) return (1); } if (n1 == n2) return (0); if (i == n1) return (-1); if (i == n2) return (1); /* cannot happen */ return (0); } static const char * _findshlib(char *name, int *majorp, int *minorp) { char *lname; const char *search_dirs[1]; static char path[PATH_MAX]; int dewey[MAXDEWEY], tmp[MAXDEWEY]; int i, len, major, minor, ndewey, n_search_dirs; n_search_dirs = 1; major = *majorp; minor = *minorp; path[0] = '\0'; search_dirs[0] = _pathI18nModule; len = strlen(name); lname = name; ndewey = 0; for (i = 0; i < n_search_dirs; i++) { struct dirent *dp; DIR *dd = opendir(search_dirs[i]); int found_dot_a = 0, found_dot_so = 0; if (dd == NULL) break; while ((dp = readdir(dd)) != NULL) { int n; if (dp->d_namlen < len + 4) continue; if (strncmp(dp->d_name, lname, (size_t)len) != 0) continue; if (strncmp(dp->d_name+len, ".so.", 4) != 0) continue; if ((n = _getdewey(tmp, dp->d_name+len+4)) == 0) continue; if (major != -1 && found_dot_a) found_dot_a = 0; /* XXX should verify the library is a.out/ELF? */ if (major == -1 && minor == -1) goto compare_version; else if (major != -1 && minor == -1) { if (tmp[0] == major) goto compare_version; } else if (major != -1 && minor != -1) { if (tmp[0] == major) { if (n == 1 || tmp[1] >= minor) goto compare_version; } } /* else, this file does not qualify */ continue; compare_version: if (_cmpndewey(tmp, n, dewey, ndewey) <= 0) continue; /* We have a better version */ found_dot_so = 1; snprintf(path, sizeof(path), "%s/%s", search_dirs[i], dp->d_name); found_dot_a = 0; bcopy(tmp, dewey, sizeof(dewey)); ndewey = n; *majorp = dewey[0]; *minorp = dewey[1]; } closedir(dd); if (found_dot_a || found_dot_so) /* * There's a lib in this dir; take it. */ return (path[0] ? path : NULL); } return (path[0] ? path : NULL); } void * _citrus_find_getops(_citrus_module_t handle, const char *modname, const char *ifname) { char name[PATH_MAX]; void *p; snprintf(name, sizeof(name), "_citrus_%s_%s_getops", modname, ifname); p = dlsym((void *)handle, name); return (p); } int _citrus_load_module(_citrus_module_t *rhandle, const char *encname) { const char *p; char path[PATH_MAX]; void *handle; int maj, min; if (_pathI18nModule == NULL) { p = secure_getenv("PATH_I18NMODULE"); if (p != NULL) { _pathI18nModule = strdup(p); if (_pathI18nModule == NULL) return (ENOMEM); } else _pathI18nModule = _PATH_I18NMODULE; } (void)snprintf(path, sizeof(path), "lib%s", encname); maj = I18NMODULE_MAJOR; min = -1; p = _findshlib(path, &maj, &min); if (!p) return (EINVAL); handle = libc_dlopen(p, RTLD_LAZY); if (!handle) { printf("%s", dlerror()); return (EINVAL); } *rhandle = (_citrus_module_t)handle; return (0); } void _citrus_unload_module(_citrus_module_t handle) { if (handle) dlclose((void *)handle); }
