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	diff --git a/lib/services/services.c b/lib/services/services.c
	index 89b2ec0372..b8240a2dc5 100644
	--- a/lib/services/services.c
	+++ b/lib/services/services.c
	@@ -1,1108 +1,1110 @@
	/*
	* Copyright 2010-2020 the Pacemaker project contributors
	*
	* The version control history for this file may have further details.
	*
	* This source code is licensed under the GNU Lesser General Public License
	* version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
	*/

	#include <crm_internal.h>

	#ifndef _GNU_SOURCE
	# define _GNU_SOURCE
	#endif

	#include <sys/types.h>
	#include <stdio.h>
	#include <errno.h>
	#include <unistd.h>
	#include <dirent.h>
	#include <fcntl.h>

	#include <crm/crm.h>
	#include <crm/common/mainloop.h>
	#include <crm/services.h>
	#include <crm/stonith-ng.h>
	#include <crm/msg_xml.h>
	#include "services_private.h"
	#include "services_lsb.h"

	#if SUPPORT_UPSTART
	# include <upstart.h>
	#endif

	#if SUPPORT_SYSTEMD
	# include <systemd.h>
	#endif

	#if SUPPORT_NAGIOS
	# include <services_nagios.h>
	#endif

	/* TODO: Develop a rollover strategy */

	static int operations = 0;
	static GHashTable *recurring_actions = NULL;

	/* ops waiting to run async because of conflicting active
	* pending ops */
	static GList *blocked_ops = NULL;

	/* ops currently active (in-flight) */
	static GList *inflight_ops = NULL;

	static void handle_blocked_ops(void);

	/*!
	* \brief Find first service class that can provide a specified agent
	*
	* \param[in] agent Name of agent to search for
	*
	* \return Service class if found, NULL otherwise
	*
	* \note The priority is LSB, then systemd, then upstart. It would be preferable
	* to put systemd first, but LSB merely requires a file existence check,
	* while systemd requires contacting D-Bus.
	*/
	const char *
	resources_find_service_class(const char *agent)
	{
	if (services__lsb_agent_exists(agent)) {
	return PCMK_RESOURCE_CLASS_LSB;
	}

	#if SUPPORT_SYSTEMD
	if (systemd_unit_exists(agent)) {
	return PCMK_RESOURCE_CLASS_SYSTEMD;
	}
	#endif

	#if SUPPORT_UPSTART
	if (upstart_job_exists(agent)) {
	return PCMK_RESOURCE_CLASS_UPSTART;
	}
	#endif
	return NULL;
	}

	static inline void
	init_recurring_actions(void)
	{
	if (recurring_actions == NULL) {
	recurring_actions = g_hash_table_new_full(g_str_hash, g_str_equal, NULL,
	NULL);
	}
	}

	/*!
	* \internal
	* \brief Check whether op is in-flight systemd or upstart op
	*
	* \param[in] op Operation to check
	*
	* \return TRUE if op is in-flight systemd or upstart op
	*/
	static inline gboolean
	inflight_systemd_or_upstart(svc_action_t *op)
	{
	return pcmk__strcase_any_of(op->standard, PCMK_RESOURCE_CLASS_SYSTEMD,
	PCMK_RESOURCE_CLASS_UPSTART, NULL) &&
	g_list_find(inflight_ops, op) != NULL;
	}

	/*!
	* \internal
	* \brief Expand "service" alias to an actual resource class
	*
	* \param[in] rsc Resource name (for logging only)
	* \param[in] standard Resource class as configured
	* \param[in] agent Agent name to look for
	*
	* \return Newly allocated string with actual resource class
	*
	* \note The caller is responsible for calling free() on the result.
	*/
	static char *
	expand_resource_class(const char rsc, const char standard, const char *agent)
	{
	char *expanded_class = NULL;

	if (strcasecmp(standard, PCMK_RESOURCE_CLASS_SERVICE) == 0) {
	const char *found_class = resources_find_service_class(agent);

	if (found_class) {
	crm_debug("Found %s agent %s for %s", found_class, agent, rsc);
	expanded_class = strdup(found_class);
	} else {
	crm_info("Assuming resource class lsb for agent %s for %s",
	agent, rsc);
	expanded_class = strdup(PCMK_RESOURCE_CLASS_LSB);
	}
	} else {
	expanded_class = strdup(standard);
	}
	CRM_ASSERT(expanded_class);
	return expanded_class;
	}

	+#if SUPPORT_NAGIOS
	/*!
	* \brief Duplicate a file path, inserting a prefix if not absolute
	*
	* \param[in] filename File path to duplicate
	* \param[in] dirname If filename is not absolute, prefix to add
	*
	* \return Newly allocated memory with full path
	*/
	static char *
	dup_file_path(const char filename, const char dirname)
	{
	return (*filename == '/')? strdup(filename)
	: crm_strdup_printf("%s/%s", dirname, filename);
	}
	+#endif

	svc_action_t *
	resources_action_create(const char name, const char standard,
	const char provider, const char agent,
	const char *action, guint interval_ms, int timeout,
	GHashTable *params, enum svc_action_flags flags)
	{
	svc_action_t *op = NULL;
	uint32_t ra_caps = 0;

	/*
	* Do some up front sanity checks before we go off and
	* build the svc_action_t instance.
	*/

	if (pcmk__str_empty(name)) {
	crm_err("Cannot create operation without resource name");
	goto return_error;
	}

	if (pcmk__str_empty(standard)) {
	crm_err("Cannot create operation for %s without resource class", name);
	goto return_error;
	}
	ra_caps = pcmk_get_ra_caps(standard);

	if (pcmk_is_set(ra_caps, pcmk_ra_cap_provider)
	&& pcmk__str_empty(provider)) {
	crm_err("Cannot create operation for %s without provider", name);
	goto return_error;
	}

	if (pcmk__str_empty(agent)) {
	crm_err("Cannot create operation for %s without agent name", name);
	goto return_error;
	}

	if (pcmk__str_empty(action)) {
	crm_err("Cannot create operation for %s without operation name", name);
	goto return_error;
	}

	/*
	* Sanity checks passed, proceed!
	*/

	op = calloc(1, sizeof(svc_action_t));
	op->opaque = calloc(1, sizeof(svc_action_private_t));
	op->rsc = strdup(name);
	op->interval_ms = interval_ms;
	op->timeout = timeout;
	op->standard = expand_resource_class(name, standard, agent);
	op->agent = strdup(agent);
	op->sequence = ++operations;
	op->flags = flags;
	op->id = pcmk__op_key(name, action, interval_ms);

	if (pcmk_is_set(ra_caps, pcmk_ra_cap_status)
	&& pcmk__str_eq(action, "monitor", pcmk__str_casei)) {

	op->action = strdup("status");
	} else {
	op->action = strdup(action);
	}

	if (pcmk_is_set(ra_caps, pcmk_ra_cap_provider)) {
	op->provider = strdup(provider);
	}

	if (pcmk_is_set(ra_caps, pcmk_ra_cap_params)) {
	op->params = params;
	params = NULL; // so we don't free them in this function
	}

	if (strcasecmp(op->standard, PCMK_RESOURCE_CLASS_OCF) == 0) {
	op->opaque->exec = crm_strdup_printf("%s/resource.d/%s/%s",
	OCF_ROOT_DIR, provider, agent);
	op->opaque->args[0] = strdup(op->opaque->exec);
	op->opaque->args[1] = strdup(op->action);

	} else if (strcasecmp(op->standard, PCMK_RESOURCE_CLASS_LSB) == 0) {
	op->opaque->exec = services__lsb_agent_path(op->agent);
	op->opaque->args[0] = strdup(op->opaque->exec);
	op->opaque->args[1] = strdup(op->action);

	#if SUPPORT_SYSTEMD
	} else if (strcasecmp(op->standard, PCMK_RESOURCE_CLASS_SYSTEMD) == 0) {
	op->opaque->exec = strdup("systemd-dbus");
	#endif
	#if SUPPORT_UPSTART
	} else if (strcasecmp(op->standard, PCMK_RESOURCE_CLASS_UPSTART) == 0) {
	op->opaque->exec = strdup("upstart-dbus");
	#endif
	#if SUPPORT_NAGIOS
	} else if (strcasecmp(op->standard, PCMK_RESOURCE_CLASS_NAGIOS) == 0) {
	op->opaque->exec = dup_file_path(op->agent, NAGIOS_PLUGIN_DIR);
	op->opaque->args[0] = strdup(op->opaque->exec);

	if (pcmk__str_eq(op->action, "monitor", pcmk__str_casei) && (op->interval_ms == 0)) {
	/* Invoke --version for a nagios probe */
	op->opaque->args[1] = strdup("--version");

	} else if (op->params) {
	GHashTableIter iter;
	char *key = NULL;
	char *value = NULL;
	int index = 1;
	static int args_size = sizeof(op->opaque->args) / sizeof(char *);

	g_hash_table_iter_init(&iter, op->params);

	while (g_hash_table_iter_next(&iter, (gpointer ) & key, (gpointer ) & value) &&
	index <= args_size - 3) {

	if (pcmk__str_eq(key, XML_ATTR_CRM_VERSION, pcmk__str_casei) \|\| strstr(key, CRM_META "_")) {
	continue;
	}
	op->opaque->args[index++] = crm_strdup_printf("--%s", key);
	op->opaque->args[index++] = strdup(value);
	}
	}

	// Nagios actions don't need to keep the parameters
	if (op->params != NULL) {
	g_hash_table_destroy(op->params);
	op->params = NULL;
	}
	#endif
	} else {
	crm_err("Unknown resource standard: %s", op->standard);
	goto return_error;
	}

	if(params) {
	g_hash_table_destroy(params);
	}
	return op;

	return_error:
	if(params) {
	g_hash_table_destroy(params);
	}
	services_action_free(op);

	return NULL;
	}

	svc_action_t *
	services_action_create_generic(const char exec, const char args[])
	{
	svc_action_t *op;
	unsigned int cur_arg;

	op = calloc(1, sizeof(*op));
	op->opaque = calloc(1, sizeof(svc_action_private_t));

	op->opaque->exec = strdup(exec);
	op->opaque->args[0] = strdup(exec);

	for (cur_arg = 1; args && args[cur_arg - 1]; cur_arg++) {
	op->opaque->args[cur_arg] = strdup(args[cur_arg - 1]);

	if (cur_arg == DIMOF(op->opaque->args) - 1) {
	crm_err("svc_action_t args list not long enough for '%s' execution request.", exec);
	break;
	}
	}

	return op;
	}

	/*!
	* \brief Create an alert agent action
	*
	* \param[in] id Alert ID
	* \param[in] exec Path to alert agent executable
	* \param[in] timeout Action timeout
	* \param[in] params Parameters to use with action
	* \param[in] sequence Action sequence number
	* \param[in] cb_data Data to pass to callback function
	*
	* \return New action on success, NULL on error
	* \note It is the caller's responsibility to free cb_data.
	* The caller should not free params explicitly.
	*/
	svc_action_t *
	services_alert_create(const char id, const char exec, int timeout,
	GHashTable params, int sequence, void cb_data)
	{
	svc_action_t *action = services_action_create_generic(exec, NULL);

	CRM_ASSERT(action);
	action->timeout = timeout;
	action->id = strdup(id);
	action->params = params;
	action->sequence = sequence;
	action->cb_data = cb_data;
	return action;
	}

	/*!
	* \brief Set the user and group that an action will execute as
	*
	* \param[in,out] action Action to modify
	* \param[in] user Name of user to execute action as
	* \param[in] group Name of group to execute action as
	*
	* \return pcmk_ok on success, -errno otherwise
	*
	* \note This will have no effect unless the process executing the action runs
	* as root, and the action is not a systemd or upstart action.
	* We could implement this for systemd by adding User= and Group= to
	* [Service] in the override file, but that seems more likely to cause
	* problems than be useful.
	*/
	int
	services_action_user(svc_action_t op, const char user)
	{
	CRM_CHECK((op != NULL) && (user != NULL), return -EINVAL);
	return crm_user_lookup(user, &(op->opaque->uid), &(op->opaque->gid));
	}

	/*!
	* \brief Execute an alert agent action
	*
	* \param[in] action Action to execute
	* \param[in] cb Function to call when action completes
	*
	* \return TRUE if the library will free action, FALSE otherwise
	*
	* \note If this function returns FALSE, it is the caller's responsibility to
	* free the action with services_action_free().
	*/
	gboolean
	services_alert_async(svc_action_t action, void (cb)(svc_action_t *op))
	{
	action->synchronous = false;
	action->opaque->callback = cb;
	return services_os_action_execute(action);
	}

	#if SUPPORT_DBUS
	/*!
	* \internal
	* \brief Update operation's pending DBus call, unreferencing old one if needed
	*
	* \param[in,out] op Operation to modify
	* \param[in] pending Pending call to set
	*/
	void
	services_set_op_pending(svc_action_t op, DBusPendingCall pending)
	{
	if (op->opaque->pending && (op->opaque->pending != pending)) {
	if (pending) {
	crm_info("Lost pending %s DBus call (%p)", op->id, op->opaque->pending);
	} else {
	crm_trace("Done with pending %s DBus call (%p)", op->id, op->opaque->pending);
	}
	dbus_pending_call_unref(op->opaque->pending);
	}
	op->opaque->pending = pending;
	if (pending) {
	crm_trace("Updated pending %s DBus call (%p)", op->id, pending);
	} else {
	crm_trace("Cleared pending %s DBus call", op->id);
	}
	}
	#endif

	void
	services_action_cleanup(svc_action_t * op)
	{
	if ((op == NULL) \|\| (op->opaque == NULL)) {
	return;
	}

	#if SUPPORT_DBUS
	if(op->opaque->timerid != 0) {
	crm_trace("Removing timer for call %s to %s", op->action, op->rsc);
	g_source_remove(op->opaque->timerid);
	op->opaque->timerid = 0;
	}

	if(op->opaque->pending) {
	if (dbus_pending_call_get_completed(op->opaque->pending)) {
	// This should never be the case
	crm_warn("Result of %s op %s was unhandled",
	op->standard, op->id);
	} else {
	crm_debug("Will ignore any result of canceled %s op %s",
	op->standard, op->id);
	}
	dbus_pending_call_cancel(op->opaque->pending);
	services_set_op_pending(op, NULL);
	}
	#endif

	if (op->opaque->stderr_gsource) {
	mainloop_del_fd(op->opaque->stderr_gsource);
	op->opaque->stderr_gsource = NULL;
	}

	if (op->opaque->stdout_gsource) {
	mainloop_del_fd(op->opaque->stdout_gsource);
	op->opaque->stdout_gsource = NULL;
	}
	}

	void
	services_action_free(svc_action_t * op)
	{
	unsigned int i;

	if (op == NULL) {
	return;
	}

	/* The operation should be removed from all tracking lists by this point.
	* If it's not, we have a bug somewhere, so bail. That may lead to a
	* memory leak, but it's better than a use-after-free segmentation fault.
	*/
	CRM_CHECK(g_list_find(inflight_ops, op) == NULL, return);
	CRM_CHECK(g_list_find(blocked_ops, op) == NULL, return);
	CRM_CHECK((recurring_actions == NULL)
	\|\| (g_hash_table_lookup(recurring_actions, op->id) == NULL),
	return);

	services_action_cleanup(op);

	if (op->opaque->repeat_timer) {
	g_source_remove(op->opaque->repeat_timer);
	op->opaque->repeat_timer = 0;
	}

	free(op->id);
	free(op->opaque->exec);

	for (i = 0; i < DIMOF(op->opaque->args); i++) {
	free(op->opaque->args[i]);
	}

	free(op->opaque);
	free(op->rsc);
	free(op->action);

	free(op->standard);
	free(op->agent);
	free(op->provider);

	free(op->stdout_data);
	free(op->stderr_data);

	if (op->params) {
	g_hash_table_destroy(op->params);
	op->params = NULL;
	}

	free(op);
	}

	gboolean
	cancel_recurring_action(svc_action_t * op)
	{
	crm_info("Cancelling %s operation %s", op->standard, op->id);

	if (recurring_actions) {
	g_hash_table_remove(recurring_actions, op->id);
	}

	if (op->opaque->repeat_timer) {
	g_source_remove(op->opaque->repeat_timer);
	op->opaque->repeat_timer = 0;
	}

	return TRUE;
	}

	/*!
	* \brief Cancel a recurring action
	*
	* \param[in] name Name of resource that operation is for
	* \param[in] action Name of operation to cancel
	* \param[in] interval_ms Interval of operation to cancel
	*
	* \return TRUE if action was successfully cancelled, FALSE otherwise
	*/
	gboolean
	services_action_cancel(const char name, const char action, guint interval_ms)
	{
	gboolean cancelled = FALSE;
	char *id = pcmk__op_key(name, action, interval_ms);
	svc_action_t *op = NULL;

	/* We can only cancel a recurring action */
	init_recurring_actions();
	op = g_hash_table_lookup(recurring_actions, id);
	if (op == NULL) {
	goto done;
	}

	/* Tell operation_finalize() not to reschedule the operation */
	op->cancel = TRUE;

	/* Stop tracking it as a recurring operation, and stop its repeat timer */
	cancel_recurring_action(op);

	/* If the op has a PID, it's an in-flight child process, so kill it.
	*
	* Whether the kill succeeds or fails, the main loop will send the op to
	* operation_finished() (and thus operation_finalize()) when the process
	* goes away.
	*/
	if (op->pid != 0) {
	crm_info("Terminating in-flight op %s[%d] early because it was cancelled",
	id, op->pid);
	cancelled = mainloop_child_kill(op->pid);
	if (cancelled == FALSE) {
	crm_err("Termination of %s[%d] failed", id, op->pid);
	}
	goto done;
	}

	#if SUPPORT_DBUS
	// In-flight systemd and upstart ops don't have a pid
	if (inflight_systemd_or_upstart(op)) {
	inflight_ops = g_list_remove(inflight_ops, op);

	/* This will cause any result that comes in later to be discarded, so we
	* don't call the callback and free the operation twice.
	*/
	services_action_cleanup(op);
	}
	#endif

	// The rest of this is essentially equivalent to operation_finalize(),
	// except without calling handle_blocked_ops()

	// Report operation as cancelled
	op->status = PCMK_LRM_OP_CANCELLED;
	if (op->opaque->callback) {
	op->opaque->callback(op);
	}

	blocked_ops = g_list_remove(blocked_ops, op);
	services_action_free(op);
	cancelled = TRUE;
	// @TODO Initiate handle_blocked_ops() asynchronously

	done:
	free(id);
	return cancelled;
	}

	gboolean
	services_action_kick(const char name, const char action, guint interval_ms)
	{
	svc_action_t * op = NULL;
	char *id = pcmk__op_key(name, action, interval_ms);

	init_recurring_actions();
	op = g_hash_table_lookup(recurring_actions, id);
	free(id);

	if (op == NULL) {
	return FALSE;
	}


	if (op->pid \|\| inflight_systemd_or_upstart(op)) {
	return TRUE;
	} else {
	if (op->opaque->repeat_timer) {
	g_source_remove(op->opaque->repeat_timer);
	op->opaque->repeat_timer = 0;
	}
	recurring_action_timer(op);
	return TRUE;
	}

	}

	/*!
	* \internal
	* \brief Add a new recurring operation, checking for duplicates
	*
	* \param[in] op Operation to add
	*
	* \return TRUE if duplicate found (and reschedule), FALSE otherwise
	*/
	static gboolean
	handle_duplicate_recurring(svc_action_t * op)
	{
	svc_action_t * dup = NULL;

	/* check for duplicates */
	dup = g_hash_table_lookup(recurring_actions, op->id);

	if (dup && (dup != op)) {
	/* update user data */
	if (op->opaque->callback) {
	dup->opaque->callback = op->opaque->callback;
	dup->cb_data = op->cb_data;
	op->cb_data = NULL;
	}
	/* immediately execute the next interval */
	if (dup->pid != 0) {
	if (op->opaque->repeat_timer) {
	g_source_remove(op->opaque->repeat_timer);
	op->opaque->repeat_timer = 0;
	}
	recurring_action_timer(dup);
	}
	/* free the duplicate */
	services_action_free(op);
	return TRUE;
	}

	return FALSE;
	}

	inline static gboolean
	action_exec_helper(svc_action_t * op)
	{
	/* Whether a/synchronous must be decided (op->synchronous) beforehand. */
	if (op->standard
	&& (strcasecmp(op->standard, PCMK_RESOURCE_CLASS_UPSTART) == 0)) {
	#if SUPPORT_UPSTART
	return upstart_job_exec(op);
	#endif
	} else if (op->standard && strcasecmp(op->standard,
	PCMK_RESOURCE_CLASS_SYSTEMD) == 0) {
	#if SUPPORT_SYSTEMD
	return systemd_unit_exec(op);
	#endif
	} else {
	return services_os_action_execute(op);
	}
	/* The 'op' has probably been freed if the execution functions return TRUE
	for the asynchronous 'op'. */
	/* Avoid using the 'op' in here. */

	return FALSE;
	}

	void
	services_add_inflight_op(svc_action_t * op)
	{
	if (op == NULL) {
	return;
	}

	CRM_ASSERT(op->synchronous == FALSE);

	/* keep track of ops that are in-flight to avoid collisions in the same namespace */
	if (op->rsc) {
	inflight_ops = g_list_append(inflight_ops, op);
	}
	}

	/*!
	* \internal
	* \brief Stop tracking an operation that completed
	*
	* \param[in] op Operation to stop tracking
	*/
	void
	services_untrack_op(svc_action_t *op)
	{
	/* Op is no longer in-flight or blocked */
	inflight_ops = g_list_remove(inflight_ops, op);
	blocked_ops = g_list_remove(blocked_ops, op);

	/* Op is no longer blocking other ops, so check if any need to run */
	handle_blocked_ops();
	}

	gboolean
	services_action_async_fork_notify(svc_action_t * op,
	void (action_callback) (svc_action_t ),
	void (action_fork_callback) (svc_action_t ))
	{
	op->synchronous = false;
	if (action_callback) {
	op->opaque->callback = action_callback;
	}
	if (action_fork_callback) {
	op->opaque->fork_callback = action_fork_callback;
	}

	if (op->interval_ms > 0) {
	init_recurring_actions();
	if (handle_duplicate_recurring(op) == TRUE) {
	/* entry rescheduled, dup freed */
	/* exit early */
	return TRUE;
	}
	g_hash_table_replace(recurring_actions, op->id, op);
	}

	if (!pcmk_is_set(op->flags, SVC_ACTION_NON_BLOCKED)
	&& op->rsc && is_op_blocked(op->rsc)) {
	blocked_ops = g_list_append(blocked_ops, op);
	return TRUE;
	}

	return action_exec_helper(op);
	}

	gboolean
	services_action_async(svc_action_t * op,
	void (action_callback) (svc_action_t ))
	{
	return services_action_async_fork_notify(op, action_callback, NULL);
	}

	static gboolean processing_blocked_ops = FALSE;

	gboolean
	is_op_blocked(const char *rsc)
	{
	GList *gIter = NULL;
	svc_action_t *op = NULL;

	for (gIter = inflight_ops; gIter != NULL; gIter = gIter->next) {
	op = gIter->data;
	if (pcmk__str_eq(op->rsc, rsc, pcmk__str_casei)) {
	return TRUE;
	}
	}

	return FALSE;
	}

	static void
	handle_blocked_ops(void)
	{
	GList *executed_ops = NULL;
	GList *gIter = NULL;
	svc_action_t *op = NULL;
	gboolean res = FALSE;

	if (processing_blocked_ops) {
	/* avoid nested calling of this function */
	return;
	}

	processing_blocked_ops = TRUE;

	/* n^2 operation here, but blocked ops are incredibly rare. this list
	* will be empty 99% of the time. */
	for (gIter = blocked_ops; gIter != NULL; gIter = gIter->next) {
	op = gIter->data;
	if (is_op_blocked(op->rsc)) {
	continue;
	}
	executed_ops = g_list_append(executed_ops, op);
	res = action_exec_helper(op);
	if (res == FALSE) {
	op->status = PCMK_LRM_OP_ERROR;
	/* this can cause this function to be called recursively
	* which is why we have processing_blocked_ops static variable */
	operation_finalize(op);
	}
	}

	for (gIter = executed_ops; gIter != NULL; gIter = gIter->next) {
	op = gIter->data;
	blocked_ops = g_list_remove(blocked_ops, op);
	}
	g_list_free(executed_ops);

	processing_blocked_ops = FALSE;
	}

	static gboolean
	action_get_metadata(svc_action_t *op)
	{
	const char *class = op->standard;

	if (op->agent == NULL) {
	crm_err("meta-data requested without specifying agent");
	return FALSE;
	}

	if (class == NULL) {
	crm_err("meta-data requested for agent %s without specifying class",
	op->agent);
	return FALSE;
	}

	if (!strcmp(class, PCMK_RESOURCE_CLASS_SERVICE)) {
	class = resources_find_service_class(op->agent);
	}

	if (class == NULL) {
	crm_err("meta-data requested for %s, but could not determine class",
	op->agent);
	return FALSE;
	}

	if (pcmk__str_eq(class, PCMK_RESOURCE_CLASS_LSB, pcmk__str_casei)) {
	return (services__get_lsb_metadata(op->agent, &op->stdout_data) >= 0);
	}

	#if SUPPORT_NAGIOS
	if (pcmk__str_eq(class, PCMK_RESOURCE_CLASS_NAGIOS, pcmk__str_casei)) {
	return services__get_nagios_metadata(op->agent, &op->stdout_data) >= 0;
	}
	#endif

	return action_exec_helper(op);
	}

	gboolean
	services_action_sync(svc_action_t * op)
	{
	gboolean rc = TRUE;

	if (op == NULL) {
	crm_trace("No operation to execute");
	return FALSE;
	}

	op->synchronous = true;

	if (pcmk__str_eq(op->action, "meta-data", pcmk__str_casei)) {
	/* Synchronous meta-data operations are handled specially. Since most
	* resource classes don't provide any meta-data, it has to be
	* synthesized from available information about the agent.
	*
	* services_action_async() doesn't treat meta-data actions specially, so
	* it will result in an error for classes that don't support the action.
	*/
	rc = action_get_metadata(op);
	} else {
	rc = action_exec_helper(op);
	}
	crm_trace(" > " PCMK__OP_FMT ": %s = %d",
	op->rsc, op->action, op->interval_ms, op->opaque->exec, op->rc);
	if (op->stdout_data) {
	crm_trace(" > stdout: %s", op->stdout_data);
	}
	if (op->stderr_data) {
	crm_trace(" > stderr: %s", op->stderr_data);
	}
	return rc;
	}

	GList *
	get_directory_list(const char *root, gboolean files, gboolean executable)
	{
	return services_os_get_directory_list(root, files, executable);
	}

	GList *
	resources_list_standards(void)
	{
	GList *standards = NULL;
	GList *agents = NULL;

	standards = g_list_append(standards, strdup(PCMK_RESOURCE_CLASS_OCF));
	standards = g_list_append(standards, strdup(PCMK_RESOURCE_CLASS_LSB));
	standards = g_list_append(standards, strdup(PCMK_RESOURCE_CLASS_SERVICE));

	#if SUPPORT_SYSTEMD
	agents = systemd_unit_listall();
	if (agents) {
	standards = g_list_append(standards,
	strdup(PCMK_RESOURCE_CLASS_SYSTEMD));
	g_list_free_full(agents, free);
	}
	#endif

	#if SUPPORT_UPSTART
	agents = upstart_job_listall();
	if (agents) {
	standards = g_list_append(standards,
	strdup(PCMK_RESOURCE_CLASS_UPSTART));
	g_list_free_full(agents, free);
	}
	#endif

	#if SUPPORT_NAGIOS
	agents = services__list_nagios_agents();
	if (agents) {
	standards = g_list_append(standards,
	strdup(PCMK_RESOURCE_CLASS_NAGIOS));
	g_list_free_full(agents, free);
	}
	#endif

	return standards;
	}

	GList *
	resources_list_providers(const char *standard)
	{
	if (pcmk_is_set(pcmk_get_ra_caps(standard), pcmk_ra_cap_provider)) {
	return resources_os_list_ocf_providers();
	}

	return NULL;
	}

	GList *
	resources_list_agents(const char standard, const char provider)
	{
	if ((standard == NULL)
	\|\| (strcasecmp(standard, PCMK_RESOURCE_CLASS_SERVICE) == 0)) {

	GList *tmp1;
	GList *tmp2;
	GList *result = services__list_lsb_agents();

	if (standard == NULL) {
	tmp1 = result;
	tmp2 = resources_os_list_ocf_agents(NULL);
	if (tmp2) {
	result = g_list_concat(tmp1, tmp2);
	}
	}
	#if SUPPORT_SYSTEMD
	tmp1 = result;
	tmp2 = systemd_unit_listall();
	if (tmp2) {
	result = g_list_concat(tmp1, tmp2);
	}
	#endif

	#if SUPPORT_UPSTART
	tmp1 = result;
	tmp2 = upstart_job_listall();
	if (tmp2) {
	result = g_list_concat(tmp1, tmp2);
	}
	#endif

	return result;

	} else if (strcasecmp(standard, PCMK_RESOURCE_CLASS_OCF) == 0) {
	return resources_os_list_ocf_agents(provider);
	} else if (strcasecmp(standard, PCMK_RESOURCE_CLASS_LSB) == 0) {
	return services__list_lsb_agents();
	#if SUPPORT_SYSTEMD
	} else if (strcasecmp(standard, PCMK_RESOURCE_CLASS_SYSTEMD) == 0) {
	return systemd_unit_listall();
	#endif
	#if SUPPORT_UPSTART
	} else if (strcasecmp(standard, PCMK_RESOURCE_CLASS_UPSTART) == 0) {
	return upstart_job_listall();
	#endif
	#if SUPPORT_NAGIOS
	} else if (strcasecmp(standard, PCMK_RESOURCE_CLASS_NAGIOS) == 0) {
	return services__list_nagios_agents();
	#endif
	}

	return NULL;
	}

	gboolean
	resources_agent_exists(const char standard, const char provider, const char *agent)
	{
	GList *standards = NULL;
	GList *providers = NULL;
	GListPtr iter = NULL;
	gboolean rc = FALSE;
	gboolean has_providers = FALSE;

	standards = resources_list_standards();
	for (iter = standards; iter != NULL; iter = iter->next) {
	if (pcmk__str_eq(iter->data, standard, pcmk__str_none)) {
	rc = TRUE;
	break;
	}
	}

	if (rc == FALSE) {
	goto done;
	}

	rc = FALSE;

	has_providers = pcmk_is_set(pcmk_get_ra_caps(standard), pcmk_ra_cap_provider);
	if (has_providers == TRUE && provider != NULL) {
	providers = resources_list_providers(standard);
	for (iter = providers; iter != NULL; iter = iter->next) {
	if (pcmk__str_eq(iter->data, provider, pcmk__str_none)) {
	rc = TRUE;
	break;
	}
	}
	} else if (has_providers == FALSE && provider == NULL) {
	rc = TRUE;
	}

	if (rc == FALSE) {
	goto done;
	}

	if (pcmk__str_eq(standard, PCMK_RESOURCE_CLASS_SERVICE, pcmk__str_casei)) {
	if (services__lsb_agent_exists(agent)) {
	rc = TRUE;
	#if SUPPORT_SYSTEMD
	} else if (systemd_unit_exists(agent)) {
	rc = TRUE;
	#endif

	#if SUPPORT_UPSTART
	} else if (upstart_job_exists(agent)) {
	rc = TRUE;
	#endif
	} else {
	rc = FALSE;
	}

	} else if (pcmk__str_eq(standard, PCMK_RESOURCE_CLASS_OCF, pcmk__str_casei)) {
	rc = services__ocf_agent_exists(provider, agent);

	} else if (pcmk__str_eq(standard, PCMK_RESOURCE_CLASS_LSB, pcmk__str_casei)) {
	rc = services__lsb_agent_exists(agent);

	#if SUPPORT_SYSTEMD
	} else if (pcmk__str_eq(standard, PCMK_RESOURCE_CLASS_SYSTEMD, pcmk__str_casei)) {
	rc = systemd_unit_exists(agent);
	#endif

	#if SUPPORT_UPSTART
	} else if (pcmk__str_eq(standard, PCMK_RESOURCE_CLASS_UPSTART, pcmk__str_casei)) {
	rc = upstart_job_exists(agent);
	#endif

	#if SUPPORT_NAGIOS
	} else if (pcmk__str_eq(standard, PCMK_RESOURCE_CLASS_NAGIOS, pcmk__str_casei)) {
	rc = services__nagios_agent_exists(agent);
	#endif

	} else {
	rc = FALSE;
	}

	done:
	g_list_free(standards);
	g_list_free(providers);
	return rc;
	}

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