source: trunk/src/ifd/modules.c @ 698

/*
 * Module handling
 *
 * Copyright (C) 2003 Olaf Kirch <okir@suse.de>
 */

#include "internal.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <sys/param.h>
#include <ltdl.h>

static const char *ifd_module_path(const char *subdir)
{
        static char path[PATH_MAX];

        if (!ct_config.modules_dir
            && !(ct_config.modules_dir = getenv("IFD_MODULES")))
                ct_config.modules_dir = OPENCT_MODULES_PATH;

        snprintf(path, sizeof(path), "%s/%ss", ct_config.modules_dir, subdir);
        return path;
}

int ifd_load_module(const char *type, const char *name)
{
        const char *dirname;
        char path[PATH_MAX];
        lt_dlhandle handle;
        void (*init_func) (void);

        if (strstr(name, "..")) {
                ct_error("Illegal module path \"%s\"", name);
                return -1;
        }

        if (!strcmp(type, "driver")) {
                dirname = ct_config.driver_modules_dir;
        } else if (!strcmp(type, "protocol")) {
                dirname = ct_config.protocol_modules_dir;
        } else {
                ct_error("Unknown module type \"%s\"", type);
                return -1;
        }

        if (!dirname)
                dirname = ifd_module_path(type);

#if defined(HAVE_DLFCN_H) && defined(__APPLE__)
        snprintf(path, sizeof(path), "%s/%s.so", dirname, name);
#elif defined(__APPLE__)
        snprintf(path, sizeof(path), "%s/%s.bundle", dirname, name);
#else
        snprintf(path, sizeof(path), "%s/%s.so", dirname, name);
#endif

        handle = lt_dlopen(path);
        if (!handle) {
                ct_error("Failed to load %s: %s", path, lt_dlerror());
                return -1;
        }

        init_func = (void (*)(void))lt_dlsym(handle, "ifd_init_module");
        if (!init_func) {
                ct_error("%s: no function called ifd_init_module", path);
                lt_dlclose(handle);
                return -1;
        }

        init_func();
        return 0;
}