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-rw-r--r--dso/unix/dso.c251
1 files changed, 251 insertions, 0 deletions
diff --git a/dso/unix/dso.c b/dso/unix/dso.c
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+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "apr_arch_dso.h"
+#include "apr_strings.h"
+#include "apr_portable.h"
+
+#if APR_HAS_DSO
+
+#if !defined(DSO_USE_DLFCN) && !defined(DSO_USE_SHL) && !defined(DSO_USE_DYLD)
+#error No DSO implementation specified.
+#endif
+
+#ifdef HAVE_STDDEF_H
+#include <stddef.h>
+#endif
+#if APR_HAVE_STDLIB_H
+#include <stdlib.h> /* malloc(), free() */
+#endif
+#if APR_HAVE_STRING_H
+#include <string.h> /* for strerror() on HP-UX */
+#endif
+
+#if defined(DSO_USE_DYLD)
+#define DYLD_LIBRARY_HANDLE (void *)-1
+#endif
+
+APR_DECLARE(apr_status_t) apr_os_dso_handle_put(apr_dso_handle_t **aprdso,
+ apr_os_dso_handle_t osdso,
+ apr_pool_t *pool)
+{
+ *aprdso = apr_pcalloc(pool, sizeof **aprdso);
+ (*aprdso)->handle = osdso;
+ (*aprdso)->pool = pool;
+ return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_os_dso_handle_get(apr_os_dso_handle_t *osdso,
+ apr_dso_handle_t *aprdso)
+{
+ *osdso = aprdso->handle;
+ return APR_SUCCESS;
+}
+
+static apr_status_t dso_cleanup(void *thedso)
+{
+ apr_dso_handle_t *dso = thedso;
+
+ if (dso->handle == NULL)
+ return APR_SUCCESS;
+
+#if defined(DSO_USE_SHL)
+ shl_unload((shl_t)dso->handle);
+#elif defined(DSO_USE_DYLD)
+ if (dso->handle != DYLD_LIBRARY_HANDLE) {
+ NSUnLinkModule(dso->handle, FALSE);
+ }
+#elif defined(DSO_USE_DLFCN)
+ if (dlclose(dso->handle) != 0)
+ return APR_EINIT;
+#endif
+ dso->handle = NULL;
+
+ return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_dso_load(apr_dso_handle_t **res_handle,
+ const char *path, apr_pool_t *pool)
+{
+#if defined(DSO_USE_SHL)
+ shl_t os_handle = shl_load(path, BIND_IMMEDIATE, 0L);
+
+#elif defined(DSO_USE_DYLD)
+ NSObjectFileImage image;
+ NSModule os_handle = NULL;
+ NSObjectFileImageReturnCode dsoerr;
+ const char* err_msg = NULL;
+ dsoerr = NSCreateObjectFileImageFromFile(path, &image);
+
+ if (dsoerr == NSObjectFileImageSuccess) {
+#if defined(NSLINKMODULE_OPTION_RETURN_ON_ERROR) && defined(NSLINKMODULE_OPTION_NONE)
+ os_handle = NSLinkModule(image, path,
+ NSLINKMODULE_OPTION_RETURN_ON_ERROR |
+ NSLINKMODULE_OPTION_NONE);
+ /* If something went wrong, get the errors... */
+ if (!os_handle) {
+ NSLinkEditErrors errors;
+ int errorNumber;
+ const char *fileName;
+ NSLinkEditError(&errors, &errorNumber, &fileName, &err_msg);
+ }
+#else
+ os_handle = NSLinkModule(image, path, FALSE);
+#endif
+ NSDestroyObjectFileImage(image);
+ }
+ else if ((dsoerr == NSObjectFileImageFormat ||
+ dsoerr == NSObjectFileImageInappropriateFile) &&
+ NSAddLibrary(path) == TRUE) {
+ os_handle = (NSModule)DYLD_LIBRARY_HANDLE;
+ }
+ else {
+ err_msg = "cannot create object file image or add library";
+ }
+
+#elif defined(DSO_USE_DLFCN)
+#if defined(OSF1) || defined(SEQUENT) || defined(SNI) ||\
+ (defined(__FreeBSD_version) && (__FreeBSD_version >= 220000)) ||\
+ defined(__DragonFly__)
+ void *os_handle = dlopen((char *)path, RTLD_NOW | RTLD_GLOBAL);
+
+#else
+ int flags = RTLD_NOW | RTLD_GLOBAL;
+ void *os_handle;
+#ifdef _AIX
+ if (strchr(path + 1, '(') && path[strlen(path) - 1] == ')')
+ {
+ /* This special archive.a(dso.so) syntax is required for
+ * the way libtool likes to build shared libraries on AIX.
+ * dlopen() support for such a library requires that the
+ * RTLD_MEMBER flag be enabled.
+ */
+ flags |= RTLD_MEMBER;
+ }
+#endif
+ os_handle = dlopen(path, flags);
+#endif
+#endif /* DSO_USE_x */
+
+ *res_handle = apr_pcalloc(pool, sizeof(**res_handle));
+
+ if(os_handle == NULL) {
+#if defined(DSO_USE_SHL)
+ (*res_handle)->errormsg = strerror(errno);
+ return APR_EDSOOPEN;
+#elif defined(DSO_USE_DYLD)
+ (*res_handle)->errormsg = (err_msg) ? err_msg : "link failed";
+ return APR_EDSOOPEN;
+#elif defined(DSO_USE_DLFCN)
+ (*res_handle)->errormsg = dlerror();
+ return APR_EDSOOPEN;
+#endif
+ }
+
+ (*res_handle)->handle = (void*)os_handle;
+ (*res_handle)->pool = pool;
+ (*res_handle)->errormsg = NULL;
+
+ apr_pool_cleanup_register(pool, *res_handle, dso_cleanup, apr_pool_cleanup_null);
+
+ return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_dso_unload(apr_dso_handle_t *handle)
+{
+ return apr_pool_cleanup_run(handle->pool, handle, dso_cleanup);
+}
+
+APR_DECLARE(apr_status_t) apr_dso_sym(apr_dso_handle_sym_t *ressym,
+ apr_dso_handle_t *handle,
+ const char *symname)
+{
+#if defined(DSO_USE_SHL)
+ void *symaddr = NULL;
+ int status;
+
+ errno = 0;
+ status = shl_findsym((void *)&handle->handle, symname, TYPE_PROCEDURE, &symaddr);
+ if (status == -1 && errno == 0) /* try TYPE_DATA instead */
+ status = shl_findsym((void *)&handle->handle, symname, TYPE_DATA, &symaddr);
+ if (status == -1)
+ return APR_ESYMNOTFOUND;
+ *ressym = symaddr;
+ return APR_SUCCESS;
+
+#elif defined(DSO_USE_DYLD)
+ void *retval = NULL;
+ NSSymbol symbol;
+ char *symname2 = (char*)malloc(sizeof(char)*(strlen(symname)+2));
+ sprintf(symname2, "_%s", symname);
+#ifdef NSLINKMODULE_OPTION_PRIVATE
+ if (handle->handle == DYLD_LIBRARY_HANDLE) {
+ symbol = NSLookupAndBindSymbol(symname2);
+ }
+ else {
+ symbol = NSLookupSymbolInModule((NSModule)handle->handle, symname2);
+ }
+#else
+ symbol = NSLookupAndBindSymbol(symname2);
+#endif
+ free(symname2);
+ if (symbol == NULL) {
+ handle->errormsg = "undefined symbol";
+ return APR_ESYMNOTFOUND;
+ }
+ retval = NSAddressOfSymbol(symbol);
+ if (retval == NULL) {
+ handle->errormsg = "cannot resolve symbol";
+ return APR_ESYMNOTFOUND;
+ }
+ *ressym = retval;
+ return APR_SUCCESS;
+#elif defined(DSO_USE_DLFCN)
+
+#if defined(DLSYM_NEEDS_UNDERSCORE)
+ void *retval;
+ char *symbol = (char*)malloc(sizeof(char)*(strlen(symname)+2));
+ sprintf(symbol, "_%s", symname);
+ retval = dlsym(handle->handle, symbol);
+ free(symbol);
+#elif defined(SEQUENT) || defined(SNI)
+ void *retval = dlsym(handle->handle, (char *)symname);
+#else
+ void *retval = dlsym(handle->handle, symname);
+#endif /* DLSYM_NEEDS_UNDERSCORE */
+
+ if (retval == NULL) {
+ handle->errormsg = dlerror();
+ return APR_ESYMNOTFOUND;
+ }
+
+ *ressym = retval;
+
+ return APR_SUCCESS;
+#endif /* DSO_USE_x */
+}
+
+APR_DECLARE(const char *) apr_dso_error(apr_dso_handle_t *dso, char *buffer,
+ apr_size_t buflen)
+{
+ if (dso->errormsg) {
+ apr_cpystrn(buffer, dso->errormsg, buflen);
+ return dso->errormsg;
+ }
+ return "No Error";
+}
+
+#endif