/*! * After loading a module, call this function to register * the plugin with AbiWord * * \return true on success, false on failure */ bool XAP_Module::registerThySelf () { UT_ASSERT (m_bLoaded && !m_bRegistered); if (!m_bLoaded) return false; if ( m_bRegistered) return false; m_bRegistered = true; // i.e., don't try to register again typedef int (*plugin_init_func_t) (XAP_ModuleInfo *) ; plugin_init_func_t plugin_init_func; plugin_init_func_t *pfunc = &plugin_init_func; m_iStatus = 0; if (m_fnRegister) { memset (&m_info, 0, sizeof (m_info)); // ensure that this is null m_iStatus = m_fnRegister (&m_info); } else if (resolveSymbol ("abi_plugin_register", reinterpret_cast<void **>(pfunc))) { if (!plugin_init_func) { // damn this sucks. probably not an abiword plugin return false; } memset (&m_info, 0, sizeof (m_info)); // ensure that this is null m_iStatus = plugin_init_func (&m_info); } return (m_iStatus ? true : false); }
void *uwsgi_load_plugin(int modifier, char *plugin, char *has_option) { void *plugin_handle = NULL; char *plugin_abs_path = NULL; char *plugin_filename = NULL; int need_free = 0; char *plugin_name = uwsgi_strip(uwsgi_str(plugin)); char *plugin_symbol_name_start = plugin_name; struct uwsgi_plugin *up; char linkpath_buf[1024], linkpath[1024]; int linkpath_size; char *colon = strchr(plugin_name, ':'); if (colon) { colon[0] = 0; modifier = atoi(plugin_name); plugin_name = colon + 1; colon[0] = ':'; } char *init_func = strchr(plugin_name, '|'); if (init_func) { init_func[0] = 0; init_func++; } if (!uwsgi_endswith(plugin_name, "_plugin.so")) { plugin_name = uwsgi_concat2(plugin_name, "_plugin.so"); need_free = 1; } plugin_symbol_name_start = plugin_name; // step 1: check for absolute plugin (stop if it fails) if (strchr(plugin_name, '/')) { #ifdef UWSGI_ELF uwsgi_plugin_parse_section(plugin_name); #endif plugin_handle = dlopen(plugin_name, RTLD_NOW | RTLD_GLOBAL); if (!plugin_handle) { if (!has_option) uwsgi_log("%s\n", dlerror()); goto end; } plugin_symbol_name_start = uwsgi_get_last_char(plugin_name, '/'); plugin_symbol_name_start++; plugin_abs_path = plugin_name; goto success; } // step dir, check for user-supplied plugins directory struct uwsgi_string_list *pdir = uwsgi.plugins_dir; while (pdir) { plugin_filename = uwsgi_concat3(pdir->value, "/", plugin_name); #ifdef UWSGI_ELF uwsgi_plugin_parse_section(plugin_filename); #endif plugin_handle = dlopen(plugin_filename, RTLD_NOW | RTLD_GLOBAL); if (plugin_handle) { plugin_abs_path = plugin_filename; //free(plugin_filename); goto success; } free(plugin_filename); plugin_filename = NULL; pdir = pdir->next; } // last step: search in compile-time plugin_dir if (!plugin_handle) { plugin_filename = uwsgi_concat3(UWSGI_PLUGIN_DIR, "/", plugin_name); #ifdef UWSGI_ELF uwsgi_plugin_parse_section(plugin_filename); #endif plugin_handle = dlopen(plugin_filename, RTLD_NOW | RTLD_GLOBAL); plugin_abs_path = plugin_filename; //free(plugin_filename); } success: if (!plugin_handle) { if (!has_option) uwsgi_log("!!! UNABLE to load uWSGI plugin: %s !!!\n", dlerror()); } else { if (init_func) { void (*plugin_init_func)() = dlsym(plugin_handle, init_func); if (plugin_init_func) { plugin_init_func(); } } char *plugin_entry_symbol = uwsgi_concat2n(plugin_symbol_name_start, strlen(plugin_symbol_name_start) - 3, "", 0); up = dlsym(plugin_handle, plugin_entry_symbol); if (!up) { // is it a link ? memset(linkpath_buf, 0, 1024); memset(linkpath, 0, 1024); if ((linkpath_size = readlink(plugin_abs_path, linkpath_buf, 1023)) > 0) { do { linkpath_buf[linkpath_size] = '\0'; strncpy(linkpath, linkpath_buf, linkpath_size + 1); } while ((linkpath_size = readlink(linkpath, linkpath_buf, 1023)) > 0); #ifdef UWSGI_DEBUG uwsgi_log("%s\n", linkpath); #endif free(plugin_entry_symbol); char *slash = uwsgi_get_last_char(linkpath, '/'); if (!slash) { slash = linkpath; } else { slash++; } plugin_entry_symbol = uwsgi_concat2n(slash, strlen(slash) - 3, "", 0); up = dlsym(plugin_handle, plugin_entry_symbol); } } if (up) { if (!up->name) { uwsgi_log("the loaded plugin (%s) has no .name attribute\n", plugin_name); if (dlclose(plugin_handle)) { uwsgi_error("dlclose()"); } if (need_free) free(plugin_name); if (plugin_filename) free(plugin_filename); free(plugin_entry_symbol); return NULL; } if (plugin_already_loaded(up->name)) { if (dlclose(plugin_handle)) { uwsgi_error("dlclose()"); } if (need_free) free(plugin_name); if (plugin_filename) free(plugin_filename); free(plugin_entry_symbol); return NULL; } if (has_option) { struct uwsgi_option *op = up->options; int found = 0; while (op && op->name) { if (!strcmp(has_option, op->name)) { found = 1; break; } op++; } if (!found) { if (dlclose(plugin_handle)) { uwsgi_error("dlclose()"); } if (need_free) free(plugin_name); if (plugin_filename) free(plugin_filename); free(plugin_entry_symbol); return NULL; } } if (modifier != -1) { fill_plugin_table(modifier, up); up->modifier1 = modifier; } else { fill_plugin_table(up->modifier1, up); } if (need_free) free(plugin_name); if (plugin_filename) free(plugin_filename); free(plugin_entry_symbol); if (up->on_load) up->on_load(); return plugin_handle; } if (!has_option) uwsgi_log("%s\n", dlerror()); } end: if (need_free) free(plugin_name); if (plugin_filename) free(plugin_filename); return NULL; }