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/* Copyright 2000-2004 The Apache Software Foundation
*
* Licensed 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((shl_t *)&handle->handle, symname, TYPE_PROCEDURE, &symaddr);
if (status == -1 && errno == 0) /* try TYPE_DATA instead */
status = shl_findsym((shl_t *)&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
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