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/* Dynamic loading of the sort backend.
* We use GLib's multiplatform dl() wrapper
* to open up libsortsieve and
* populate the global 'sort' structure.
*
* (c) 2005 Aaron Stone <aaron@serendipity.cx>
*/
#include <gmodule.h>
#include "config.h"
#include "dbmailtypes.h"
#include "debug.h"
#include "sort.h"
#include "sortmodule.h"
static sort_func_t *sort = NULL;
extern db_param_t _db_params;
/* Returns:
* 1 on modules unsupported
* 0 on success
* -1 on failure to load module
* -2 on missing symbols
* -3 on memory error
*/
int sort_load_driver(void)
{
GModule *module;
char *lib = NULL;
char *driver = NULL;
if (!g_module_supported()) {
trace(TRACE_FATAL, "%s,%s: loadable modules unsupported on this platform",
__FILE__, __func__);
return 1;
}
sort = g_new0(sort_func_t,1);
if (!sort) {
trace(TRACE_FATAL, "%s,%s: cannot allocate memory",
__FILE__, __func__);
return -3;
}
/* The only supported driver is Sieve. */
driver = "sort_sieve";
/* Try local build area, then dbmail lib paths, then system lib path. */
int i;
char *lib_path[] = {
"modules/.libs",
"/usr/lib/dbmail",
"/usr/local/lib/dbmail",
NULL };
for (i = 0; i < 4; i++) {
lib = g_module_build_path(lib_path[i], driver);
module = g_module_open(lib, 0); // non-lazy bind.
if (module)
break;
}
/* If the list is exhausted without opening a module, we'll catch it,
* but we don't bomb out as we do for db and auth; just deliver normally. */
if (!module) {
trace(TRACE_ERROR, "%s,%s: cannot load %s: %s",
__FILE__, __func__,
lib, g_module_error());
return -1;
}
if (!g_module_symbol(module, "sort_process", (gpointer)&sort->process )
|| !g_module_symbol(module, "sort_validate", (gpointer)&sort->validate )
|| !g_module_symbol(module, "sort_free_result", (gpointer)&sort->free_result )
|| !g_module_symbol(module, "sort_listextensions", (gpointer)&sort->listextensions )
|| !g_module_symbol(module, "sort_get_cancelkeep", (gpointer)&sort->get_cancelkeep )
|| !g_module_symbol(module, "sort_get_reject", (gpointer)&sort->get_reject )
|| !g_module_symbol(module, "sort_get_errormsg", (gpointer)&sort->get_errormsg )
|| !g_module_symbol(module, "sort_get_error", (gpointer)&sort->get_error )
|| !g_module_symbol(module, "sort_get_mailbox", (gpointer)&sort->get_mailbox )) {
trace(TRACE_ERROR, "%s,%s: cannot find function: %s: Did you enable SIEVE"
" sorting in the DELIVERY section of dbmail.conf but forget"
" to build the Sieve loadable module?",
__FILE__, __func__, g_module_error());
return -2;
}
return 0;
}
sort_result_t *sort_process(u64_t user_idnr, struct DbmailMessage *message)
{
if (!sort)
sort_load_driver();
if (!sort->process) {
trace(TRACE_ERROR, "%s, %s: Error loading sort driver",
__FILE__, __func__);
return NULL;
}
return sort->process(user_idnr, message);
}
sort_result_t *sort_validate(u64_t user_idnr, char *scriptname)
{
if (!sort)
sort_load_driver();
if (!sort->validate) {
trace(TRACE_ERROR, "%s, %s: Error loading sort driver",
__FILE__, __func__);
return NULL;
}
return sort->validate(user_idnr, scriptname);
}
const char *sort_listextensions(void)
{
if (!sort)
sort_load_driver();
if (!sort->listextensions) {
trace(TRACE_ERROR, "%s, %s: Error loading sort driver",
__FILE__, __func__);
return NULL;
}
return sort->listextensions();
}
void sort_free_result(sort_result_t *result)
{
if (!sort->free_result)
return;
return sort->free_result(result);
}
int sort_get_cancelkeep(sort_result_t *result)
{
if (!sort->get_cancelkeep)
return 0;
return sort->get_cancelkeep(result);
}
int sort_get_reject(sort_result_t *result)
{
if (!sort->get_reject)
return 0;
return sort->get_reject(result);
}
const char * sort_get_mailbox(sort_result_t *result)
{
if (!sort->get_mailbox)
return "";
return sort->get_mailbox(result);
}
const char * sort_get_errormsg(sort_result_t *result)
{
if (!sort->get_errormsg)
return "";
return sort->get_errormsg(result);
}
int sort_get_error(sort_result_t *result)
{
if (!sort->get_error)
return 0;
return sort->get_error(result);
}
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