C++ (Cpp) plugin_load_from_file Examples

Example #1

File: plugrack.c Project: cernops/slurm

int
plugrack_load_all( plugrack_t rack )
{
	ListIterator it;
	plugrack_entry_t *e;

	if ( ! rack )
		return SLURM_ERROR;

	it = list_iterator_create( rack->entries );
	while ( ( e = list_next( it ) ) != NULL ) {
		if ( e->plug == PLUGIN_INVALID_HANDLE ) {
			plugin_load_from_file(&e->plug, e->fq_path);
		}
	}

	list_iterator_destroy( it );
	return SLURM_SUCCESS;
}

Example #2

File: plugrack.c Project: cernops/slurm

plugin_handle_t
plugrack_use_by_type( plugrack_t rack,
		      const char *full_type )
{
	ListIterator it;
	plugrack_entry_t *e;

	if ( (!rack) || (!full_type) )
		return PLUGIN_INVALID_HANDLE;

	it = list_iterator_create(rack->entries);
	while ((e = list_next(it))) {
		plugin_err_t err;

		if (strcmp(full_type, e->full_type) != 0)
			continue;

		/* See if plugin is loaded. */
		if (e->plug == PLUGIN_INVALID_HANDLE  &&
		    (err = plugin_load_from_file(&e->plug, e->fq_path)))
			error ("%s: %s", e->fq_path, plugin_strerror (err));

		/* If load was successful, increment the reference count. */
		if (e->plug != PLUGIN_INVALID_HANDLE)
			e->refcount++;

		/*
		 * Return the plugin, even if it failed to load -- this serves
		 * as an error return value.
		 */
		list_iterator_destroy(it);
		return e->plug;
	}

	/* Couldn't find a suitable plugin. */
	list_iterator_destroy(it);
	return PLUGIN_INVALID_HANDLE;
}

Example #3

File: plugin.c Project: chrisdukey/slurm

plugin_handle_t
plugin_load_and_link(const char *type_name, int n_syms,
		     const char *names[], void *ptrs[])
{
	plugin_handle_t plug = PLUGIN_INVALID_HANDLE;
	struct stat st;
	char *head = NULL, *dir_array = NULL, *so_name = NULL;
	char *file_name = NULL;
	int i = 0;
	plugin_err_t err = EPLUGIN_NOTFOUND;

	if (!type_name)
		return plug;
	so_name = xstrdup_printf("%s.so", type_name);
	while (so_name[i]) {
		if (so_name[i] == '/')
			so_name[i] = '_';
		i++;
	}
	if (!(dir_array = slurm_get_plugin_dir())) {
		error("plugin_load_and_link: No plugin dir given");
		xfree(so_name);
		return plug;
	}

	head = dir_array;
	for (i = 0; ; i++) {
		bool got_colon = 0;
		if (dir_array[i] == ':') {
			dir_array[i] = '\0';
			got_colon = 1;
		} else if (dir_array[i] != '\0')
			continue;

		file_name = xstrdup_printf("%s/%s", head, so_name);
		debug3("Trying to load plugin %s", file_name);
		if ((stat(file_name, &st) < 0) || (!S_ISREG(st.st_mode))) {
			debug4("%s: Does not exist or not a regular file.",
			       file_name);
			xfree(file_name);
			err = EPLUGIN_NOTFOUND;
		} else {
			if ((err = plugin_load_from_file(&plug, file_name))
			   == EPLUGIN_SUCCESS) {
				if (plugin_get_syms(plug, n_syms,
						    names, ptrs) >= n_syms) {
					debug3("Success.");
					xfree(file_name);
					break;
				} else {
					(void) dlclose(plug);
					err = EPLUGIN_MISSING_SYMBOL;
					plug = PLUGIN_INVALID_HANDLE;
				}
			} else
				plug = PLUGIN_INVALID_HANDLE;
			xfree(file_name);
		}

		if (got_colon) {
			head = dir_array + i + 1;
		} else
			break;
	}

	xfree(dir_array);
	xfree(so_name);
	errno = err;
	return plug;
}