8 #include <unordered_set>
15 #include "service-listener.h"
16 #include "service-constants.h"
18 #include "dinit-log.h"
21 * This header defines service_record, a data record maintaining information about a service,
22 * and service_set, a set of interdependent service records. It also defines some associated
23 * types and exceptions.
27 * Services have both a current state and a desired state. The desired state can be
28 * either STARTED or STOPPED. The current state can also be STARTING or STOPPING.
29 * A service can be "pinned" in either the STARTED or STOPPED states to prevent it
30 * from leaving that state until it is unpinned.
32 * The total state is a combination of the two, current and desired:
33 * STOPPED/STOPPED : stopped and will remain stopped
34 * STOPPED/STARTED : stopped (pinned), must be unpinned to start
35 * STARTING/STARTED : starting, but not yet started. Dependencies may also be starting.
36 * STARTING/STOPPED : as above, but the service will be stopped again as soon as it has
38 * STARTED/STARTED : running and will continue running.
39 * STARTED/STOPPED : started (pinned), must be unpinned to stop
40 * STOPPING/STOPPED : stopping and will stop. Dependents may be stopping.
41 * STOPPING/STARTED : as above, but the service will be re-started again once it stops.
43 * A scripted service is in the STARTING/STOPPING states during the script execution.
44 * A process service is in the STOPPING state when it has been signalled to stop, and is
45 * in the STARTING state when waiting for dependencies to start or for the exec() call in
46 * the forked child to complete and return a status.
48 * Acquisition/release:
50 * Each service has a dependent-count ("required_by"). This starts at 0, adds 1 if the
51 * service has explicitly been started (i.e. "start_explicit" is true), and adds 1 for
52 * each dependent service which is not STOPPED (including dependents with a soft dependency).
53 * When required_by transitions to 0, the service is stopped (unless it is pinned). When
54 * require_by transitions from 0, the service is started (unless pinned).
56 * So, in general, the dependent-count determines the desired state (STARTED if the count
57 * is greater than 0, otherwise STOPPED). However, a service can be issued a stop-and-take
58 * down order (via `stop(true)'); this will first stop dependent services, which may restart
59 * and cancel the stop of the former service. Finally, a service can be force-stopped, which
60 * means that its stop process cannot be cancelled (though it may still be put in a desired
61 * state of STARTED, meaning it will start immediately upon stopping).
65 * A service may be "pinned" in either STARTED or STOPPED states (or even both). Once it
66 * reaches a pinned state, a service will not leave that state, though its desired state
67 * may still be set. (Note that pinning prevents, but never causes, state transition).
69 * The priority of the different state deciders is:
72 * - desired state (which is manipulated by require/release operations)
74 * So a forced stop cannot occur until the service is not pinned started, for instance.
76 * Two-phase transition
77 * --------------------
78 * Transition between states occurs in two phases: propagation and execution. In both phases
79 * a linked-list queue is used to keep track of which services need processing; this avoids
80 * recursion (which would be of unknown depth and therefore liable to stack overflow).
82 * In the propagation phase, acquisition/release messages are processed, and desired state may be
83 * altered accordingly. Start and stop requests are also propagated in this phase. The state may
84 * be set to STARTING or STOPPING to reflect the desired state, but will never be set to STARTED
85 * or STOPPED (that happens in the execution phase).
87 * The two-phase transition is needed to avoid problem where a service that becomes STOPPED has
88 * an incorrect acquisition count, which may cause it to restart when it should not. The
89 * propagation phase allows the acquisition count to settle before the transition to the STOPPED
90 * state occurs, and the decision whether to restart can then be made based on the (correct)
93 * Propagation variables:
94 * prop_acquire: the service has transitioned to an acquired state and must issue an acquire
96 * prop_release: the service has transitioned to a released state and must issue a release on
99 * prop_start: the service should start
100 * prop_stop: the service should stop
102 * Note that "prop_acquire"/"prop_release" form a pair which cannot both be set at the same time
103 * which is enforced via explicit checks. For "prop_start"/"prop_stop" this occurs implicitly.
105 * In the execution phase, actions are taken to achieve the desired state. Actual state may
106 * transition according to the current and desired states. Processes can be sent signals, etc
107 * in order to stop them. A process can restart if it stops, but it does so by raising prop_start
108 * which needs to be processed in a second transition phase. Seeing as starting never causes
109 * another process to stop, the transition-execute-transition cycle always ends at the 2nd
110 * transition stage, at the latest.
113 struct onstart_flags_t {
115 bool rw_ready : 1; // file system should be writable once this service starts
116 bool log_ready : 1; // syslog should be available once this service starts
118 // Other service options flags:
119 bool no_sigterm : 1; // do not send SIGTERM
120 bool runs_on_console : 1; // run "in the foreground"
121 bool starts_on_console : 1; // starts in the foreground
122 bool pass_cs_fd : 1; // pass this service a control socket connection via fd
123 bool skippable : 1; // if interrupted the service is skipped (scripted services)
125 onstart_flags_t() noexcept : rw_ready(false), log_ready(false),
126 no_sigterm(false), runs_on_console(false), starts_on_console(false),
127 pass_cs_fd(false), skippable(false)
132 // Exception while loading a service
133 class service_load_exc
136 std::string serviceName;
137 std::string excDescription;
140 service_load_exc(std::string serviceName, std::string &&desc) noexcept
141 : serviceName(serviceName), excDescription(std::move(desc))
146 class service_not_found : public service_load_exc
149 service_not_found(std::string serviceName) noexcept
150 : service_load_exc(serviceName, "Service description not found.")
155 class service_cyclic_dependency : public service_load_exc
158 service_cyclic_dependency(std::string serviceName) noexcept
159 : service_load_exc(serviceName, "Has cyclic dependency.")
164 class service_description_exc : public service_load_exc
167 service_description_exc(std::string serviceName, std::string &&extraInfo) noexcept
168 : service_load_exc(serviceName, std::move(extraInfo))
173 class service_record;
175 class base_process_service;
177 enum class dependency_type
180 SOFT, // dependency starts in parallel, failure/stop does not affect dependent
181 WAITS_FOR, // as for SOFT, but dependent waits until dependency starts/fails before starting
182 MILESTONE // dependency must start successfully, but once started the dependency becomes soft
185 /* Service dependency record */
188 service_record * from;
192 /* Whether the 'from' service is waiting for the 'to' service to start */
194 /* Whether the 'from' service is holding an acquire on the 'to' service */
197 const dependency_type dep_type;
199 service_dep(service_record * from, service_record * to, dependency_type dep_type_p) noexcept
200 : from(from), to(to), waiting_on(false), holding_acq(false), dep_type(dep_type_p)
203 service_record * get_from() noexcept
208 service_record * get_to() noexcept
214 /* preliminary service dependency information */
218 service_record * const to;
219 dependency_type const dep_type;
221 prelim_dep(service_record *to_p, dependency_type dep_type_p) : to(to_p), dep_type(dep_type_p)
227 class service_child_watcher : public eventloop_t::child_proc_watcher_impl<service_child_watcher>
230 base_process_service * service;
231 dasynq::rearm status_change(eventloop_t &eloop, pid_t child, int status) noexcept;
233 service_child_watcher(base_process_service * sr) noexcept : service(sr) { }
236 // Watcher for the pipe used to receive exec() failure status errno
237 class exec_status_pipe_watcher : public eventloop_t::fd_watcher_impl<exec_status_pipe_watcher>
240 base_process_service * service;
241 dasynq::rearm fd_event(eventloop_t &eloop, int fd, int flags) noexcept;
243 exec_status_pipe_watcher(base_process_service * sr) noexcept : service(sr) { }
246 // service_record: base class for service record containing static information
247 // and current state of each service.
249 // This abstract base class defines the dependency behaviour of services. The actions to actually bring a
250 // service up or down are specified by subclasses in the virtual methods (see especially bring_up() and
256 using string = std::string;
257 using time_val = dasynq::time_val;
261 service_type_t record_type; /* ServiceType::DUMMY, PROCESS, SCRIPTED, INTERNAL */
262 service_state_t service_state = service_state_t::STOPPED; /* service_state_t::STOPPED, STARTING, STARTED, STOPPING */
263 service_state_t desired_state = service_state_t::STOPPED; /* service_state_t::STOPPED / STARTED */
268 onstart_flags_t onstart_flags;
270 string logfile; // log file name, empty string specifies /dev/null
272 bool auto_restart : 1; // whether to restart this (process) if it dies unexpectedly
273 bool smooth_recovery : 1; // whether the service process can restart without bringing down service
275 bool pinned_stopped : 1;
276 bool pinned_started : 1;
277 bool waiting_for_deps : 1; // if STARTING, whether we are waiting for dependencies (inc console) to start
278 // if STOPPING, whether we are waiting for dependents to stop
279 bool waiting_for_console : 1; // waiting for exclusive console access (while STARTING)
280 bool have_console : 1; // whether we have exclusive console access (STARTING/STARTED)
281 bool waiting_for_execstat : 1; // if we are waiting for exec status after fork()
282 bool start_explicit : 1; // whether we are are explicitly required to be started
284 bool prop_require : 1; // require must be propagated
285 bool prop_release : 1; // release must be propagated
286 bool prop_failure : 1; // failure to start must be propagated
290 bool restarting : 1; // re-starting after unexpected termination
291 bool start_failed : 1; // failed to start (reset when begins starting)
292 bool start_skipped : 1; // start was skipped by interrupt
294 int required_by = 0; // number of dependents wanting this service to be started
296 // list of dependencies
297 typedef std::list<service_dep> dep_list;
299 // list of dependents
300 typedef std::list<service_dep *> dpt_list;
302 dep_list depends_on; // services this one depends on
303 dpt_list dependents; // services depending on this one
305 service_set *services; // the set this service belongs to
307 std::unordered_set<service_listener *> listeners;
310 bool force_stop; // true if the service must actually stop. This is the
311 // case if for example the process dies; the service,
312 // and all its dependencies, MUST be stopped.
314 int term_signal = -1; // signal to use for process termination
316 string socket_path; // path to the socket for socket-activation service
317 int socket_perms; // socket permissions ("mode")
318 uid_t socket_uid = -1; // socket user id or -1
319 gid_t socket_gid = -1; // socket group id or -1
321 // Data for use by service_set
325 lld_node<service_record> console_queue_node;
327 // Propagation and start/stop queues
328 lls_node<service_record> prop_queue_node;
329 lls_node<service_record> stop_queue_node;
333 // Service has actually stopped (includes having all dependents
334 // reaching STOPPED state).
335 void stopped() noexcept;
337 // Service has successfully started
338 void started() noexcept;
340 // Service failed to start (only called when in STARTING state).
341 // dep_failed: whether failure is recorded due to a dependency failing
342 // immediate_stop: whether to set state as STOPPED and handle complete stop.
343 void failed_to_start(bool dep_failed = false, bool immediate_stop = true) noexcept;
345 // Run a child process (call after forking).
346 // - args specifies the program arguments including the executable (argv[0])
347 // - working_dir specifies the working directory; may be null
348 // - logfile specifies the logfile
349 // - on_console: if true, process is run with access to console
350 // - wpipefd: if the exec is unsuccessful, or another error occurs beforehand, the
351 // error number (errno) is written to this file descriptor
352 // - csfd: the control socket fd; may be -1 to inhibit passing of control socket
353 // - socket_fd: the pre-opened socket file descriptor (may be -1)
354 // - uid/gid: the identity to run the process as (may be both -1, otherwise both must be valid)
355 void run_child_proc(const char * const *args, const char *working_dir, const char *logfile,
356 bool on_console, int wpipefd, int csfd, int socket_fd, uid_t uid, gid_t gid) noexcept;
358 // A dependency has reached STARTED state
359 void dependency_started() noexcept;
361 void all_deps_started() noexcept;
363 // Start all dependencies, return true if all have started
364 bool start_check_dependencies() noexcept;
366 // Check whether all dependencies have started (i.e. whether we can start now)
367 bool check_deps_started() noexcept;
369 // Whether a STOPPING service can immediately transition to STARTED.
370 bool can_interrupt_stop() noexcept
372 return waiting_for_deps && ! force_stop;
375 // A dependent has reached STOPPED state
376 void dependent_stopped() noexcept;
378 // check if all dependents have stopped
379 bool stop_check_dependents() noexcept;
381 // issue a stop to all dependents, return true if they are all already stopped
382 bool stop_dependents() noexcept;
384 void require() noexcept;
385 void release(bool issue_stop = true) noexcept;
386 void release_dependencies() noexcept;
388 // Check if service is, fundamentally, stopped.
389 bool is_stopped() noexcept
391 return service_state == service_state_t::STOPPED
392 || (service_state == service_state_t::STARTING && waiting_for_deps);
395 void notify_listeners(service_event_t event) noexcept
397 for (auto l : listeners) {
398 l->service_event(this, event);
402 // Queue to run on the console. 'acquired_console()' will be called when the console is available.
403 // Has no effect if the service has already queued for console.
404 void queue_for_console() noexcept;
406 // Release console (console must be currently held by this service)
407 void release_console() noexcept;
409 bool do_auto_restart() noexcept;
411 // Started state reached
412 bool process_started() noexcept;
414 // Called on transition of desired state from stopped to started (or unpinned stop)
415 void do_start() noexcept;
417 // Begin stopping, release activation.
418 void do_stop() noexcept;
420 // Set the service state
421 void set_state(service_state_t new_state) noexcept
423 service_state = new_state;
426 // Virtual functions, to be implemented by service implementations:
428 // Do any post-dependency startup; return false on failure
429 virtual bool bring_up() noexcept;
431 // All dependents have stopped, and this service should proceed to stop.
432 virtual void bring_down() noexcept;
434 // Whether a STARTING service can immediately transition to STOPPED (as opposed to
435 // having to wait for it reach STARTED and then go through STOPPING).
436 virtual bool can_interrupt_start() noexcept
438 return waiting_for_deps;
441 // Whether a STARTING service can transition to its STARTED state, once all
442 // dependencies have started.
443 virtual bool can_proceed_to_start() noexcept
448 // Interrupt startup. Returns true if service start is fully cancelled; returns false if cancel order
449 // issued but service has not yet responded (state will be set to STOPPING).
450 virtual bool interrupt_start() noexcept;
452 // The service is becoming inactive - i.e. it has stopped and will not be immediately restarted. Perform
453 // any appropriate cleanup.
454 virtual void becoming_inactive() noexcept { }
458 service_record(service_set *set, string name)
459 : service_state(service_state_t::STOPPED), desired_state(service_state_t::STOPPED),
460 auto_restart(false), smooth_recovery(false),
461 pinned_stopped(false), pinned_started(false), waiting_for_deps(false),
462 waiting_for_console(false), have_console(false), waiting_for_execstat(false),
463 start_explicit(false), prop_require(false), prop_release(false), prop_failure(false),
464 prop_start(false), prop_stop(false), restarting(false), start_failed(false),
465 start_skipped(false), force_stop(false)
469 record_type = service_type_t::DUMMY;
473 service_record(service_set *set, string name, service_type_t record_type_p,
474 const std::list<prelim_dep> &deplist_p)
475 : service_record(set, name)
479 this->record_type = record_type_p;
481 for (auto & pdep : deplist_p) {
482 auto b = depends_on.emplace(depends_on.end(), this, pdep.to, pdep.dep_type);
483 pdep.to->dependents.push_back(&(*b));
487 virtual ~service_record() noexcept
491 // Get the type of this service record
492 service_type_t get_type() noexcept
497 // begin transition from stopped to started state or vice versa depending on current and desired state
498 void execute_transition() noexcept;
500 void do_propagation() noexcept;
502 // Console is available.
503 void acquired_console() noexcept;
505 // Get the target (aka desired) state.
506 service_state_t get_target_state() noexcept
508 return desired_state;
511 // Set logfile, should be done before service is started
512 void set_log_file(string logfile)
514 this->logfile = logfile;
517 // Set whether this service should automatically restart when it dies
518 void set_auto_restart(bool auto_restart) noexcept
520 this->auto_restart = auto_restart;
523 void set_smooth_recovery(bool smooth_recovery) noexcept
525 this->smooth_recovery = smooth_recovery;
528 // Set "on start" flags (commands)
529 void set_flags(onstart_flags_t flags) noexcept
531 this->onstart_flags = flags;
534 void set_pid_file(string &&pid_file) noexcept
536 this->pid_file = std::move(pid_file);
539 void set_socket_details(string &&socket_path, int socket_perms, uid_t socket_uid, uid_t socket_gid) noexcept
541 this->socket_path = std::move(socket_path);
542 this->socket_perms = socket_perms;
543 this->socket_uid = socket_uid;
544 this->socket_gid = socket_gid;
547 const std::string &get_name() const noexcept { return service_name; }
548 service_state_t get_state() const noexcept { return service_state; }
550 void start(bool activate = true) noexcept; // start the service
551 void stop(bool bring_down = true) noexcept; // stop the service
553 void forced_stop() noexcept; // force-stop this service and all dependents
555 // Pin the service in "started" state (when it reaches the state)
556 void pin_start() noexcept
558 pinned_started = true;
561 // Pin the service in "stopped" state (when it reaches the state)
562 void pin_stop() noexcept
564 pinned_stopped = true;
567 // Remove both "started" and "stopped" pins. If the service is currently pinned
568 // in either state but would naturally be in the opposite state, it will immediately
569 // commence starting/stopping.
570 void unpin() noexcept;
572 // Is this a dummy service (used only when loading a new service)?
573 bool is_dummy() noexcept
575 return record_type == service_type_t::DUMMY;
578 bool did_start_fail() noexcept
583 bool was_start_skipped() noexcept
585 return start_skipped;
588 // Add a listener. A listener must only be added once. May throw std::bad_alloc.
589 void add_listener(service_listener * listener)
591 listeners.insert(listener);
594 // Remove a listener.
595 void remove_listener(service_listener * listener) noexcept
597 listeners.erase(listener);
600 // Assuming there is one reference (from a control link), return true if this is the only reference,
601 // or false if there are others (including dependents).
602 bool has_lone_ref() noexcept
604 if (! dependents.empty()) return false;
605 auto i = listeners.begin();
606 return (++i == listeners.end());
609 // Prepare this service to be unloaded.
610 void prepare_for_unload() noexcept
612 // Remove all dependencies:
613 for (auto &dep : depends_on) {
614 auto &dep_dpts = dep.get_to()->dependents;
615 dep_dpts.erase(std::find(dep_dpts.begin(), dep_dpts.end(), &dep));
621 inline auto extract_prop_queue(service_record *sr) -> decltype(sr->prop_queue_node) &
623 return sr->prop_queue_node;
626 inline auto extract_stop_queue(service_record *sr) -> decltype(sr->stop_queue_node) &
628 return sr->stop_queue_node;
631 inline auto extract_console_queue(service_record *sr) -> decltype(sr->console_queue_node) &
633 return sr->console_queue_node;
637 * A service_set, as the name suggests, manages a set of services.
639 * Other than the ability to find services by name, the service set manages various queues.
640 * One is the queue for processes wishing to acquire the console. There is also a set of
641 * processes that want to start, and another set of those that want to stop. These latter
642 * two "queues" (not really queues since their order is not important) are used to prevent too
643 * much recursion and to prevent service states from "bouncing" too rapidly.
645 * A service that wishes to start or stop puts itself on the start/stop queue; a service that
646 * needs to propagate changes to dependent services or dependencies puts itself on the
647 * propagation queue. Any operation that potentially manipulates the queues must be followed
648 * by a "process queues" order (processQueues() method).
650 * Note that processQueues always repeatedly processes both queues until they are empty. The
651 * process is finite because starting a service can never cause services to stop, unless they
652 * fail to start, which should cause them to stop semi-permanently.
658 std::list<service_record *> records;
659 bool restart_enabled; // whether automatic restart is enabled (allowed)
661 shutdown_type_t shutdown_type = shutdown_type_t::CONTINUE; // Shutdown type, if stopping
663 // Services waiting for exclusive access to the console
664 dlist<service_record, extract_console_queue> console_queue;
666 // Propagation and start/stop "queues" - list of services waiting for processing
667 slist<service_record, extract_prop_queue> prop_queue;
668 slist<service_record, extract_stop_queue> stop_queue;
674 restart_enabled = true;
677 virtual ~service_set()
679 for (auto * s : records) {
684 // Start the specified service. The service will be marked active.
685 void start_service(service_record *svc)
691 // Stop the specified service. Its active mark will be cleared.
692 void stop_service(service_record *svc)
698 // Locate an existing service record.
699 service_record *find_service(const std::string &name) noexcept;
701 // Load a service description, and dependencies, if there is no existing
702 // record for the given name.
704 // ServiceLoadException (or subclass) on problem with service description
705 // std::bad_alloc on out-of-memory condition
706 virtual service_record *load_service(const char *name)
708 auto r = find_service(name);
710 throw service_not_found(name);
715 // Start the service with the given name. The named service will begin
716 // transition to the 'started' state.
718 // Throws a ServiceLoadException (or subclass) if the service description
719 // cannot be loaded or is invalid;
720 // Throws std::bad_alloc if out of memory.
721 void start_service(const char *name)
724 service_record *record = load_service(name);
725 service_set::start_service(record);
728 void add_service(service_record *svc)
730 records.push_back(svc);
733 void remove_service(service_record *svc)
735 records.erase(std::find(records.begin(), records.end(), svc));
738 // Get the list of all loaded services.
739 const std::list<service_record *> &list_services() noexcept
744 // Stop the service with the given name. The named service will begin
745 // transition to the 'stopped' state.
746 void stop_service(const std::string &name) noexcept;
748 // Add a service record to the state propagation queue. The service record will have its
749 // do_propagation() method called when the queue is processed.
750 void add_prop_queue(service_record *service) noexcept
752 if (! prop_queue.is_queued(service)) {
753 prop_queue.insert(service);
757 // Add a service record to the stop queue. The service record will have its
758 // execute_transition() method called when the queue is processed.
759 void add_transition_queue(service_record *service) noexcept
761 if (! stop_queue.is_queued(service)) {
762 stop_queue.insert(service);
766 // Process state propagation and start/stop queues, until they are empty.
767 void process_queues() noexcept
769 while (! stop_queue.is_empty() || ! prop_queue.is_empty()) {
770 while (! prop_queue.is_empty()) {
771 auto next = prop_queue.pop_front();
772 next->do_propagation();
774 while (! stop_queue.is_empty()) {
775 auto next = stop_queue.pop_front();
776 next->execute_transition();
781 // Set the console queue tail (returns previous tail)
782 void append_console_queue(service_record * newTail) noexcept
784 bool was_empty = console_queue.is_empty();
785 console_queue.append(newTail);
787 enable_console_log(false);
791 // Pull and dispatch a waiter from the console queue
792 void pull_console_queue() noexcept
794 if (console_queue.is_empty()) {
795 enable_console_log(true);
798 service_record * front = console_queue.pop_front();
799 front->acquired_console();
803 void unqueue_console(service_record * service) noexcept
805 if (console_queue.is_queued(service)) {
806 console_queue.unlink(service);
810 // Check if console queue is empty (possibly due to console already having
811 // been assigned to the only queueing service)
812 bool is_console_queue_empty() noexcept
814 return console_queue.is_empty();
817 // Check whether a service is queued for the console
818 bool is_queued_for_console(service_record * service) noexcept
820 return console_queue.is_queued(service);
823 // Notification from service that it is active (state != STOPPED)
824 // Only to be called on the transition from inactive to active.
825 void service_active(service_record *) noexcept;
827 // Notification from service that it is inactive (STOPPED)
828 // Only to be called on the transition from active to inactive.
829 void service_inactive(service_record *) noexcept;
831 // Find out how many services are active (starting, running or stopping,
833 int count_active_services() noexcept
835 return active_services;
838 void stop_all_services(shutdown_type_t type = shutdown_type_t::HALT) noexcept
840 restart_enabled = false;
841 shutdown_type = type;
842 for (std::list<service_record *>::iterator i = records.begin(); i != records.end(); ++i) {
849 void set_auto_restart(bool restart) noexcept
851 restart_enabled = restart;
854 bool get_auto_restart() noexcept
856 return restart_enabled;
859 shutdown_type_t get_shutdown_type() noexcept
861 return shutdown_type;
865 // A service directory entry, tracking the directory as a nul-terminated string, which may either
866 // be static or dynamically allocated (via new char[...]).
867 class service_dir_entry
870 bool dir_dyn_allocd; // dynamically allocated?
873 service_dir_entry(const char *dir_p, bool dir_dyn_allocd_p) :
874 dir(dir_p), dir_dyn_allocd(dir_dyn_allocd_p)
879 if (dir_dyn_allocd) {
884 const char *get_dir() const
890 // A service set which loads services from one of several service directories.
891 class dirload_service_set : public service_set
893 std::vector<service_dir_entry> service_dirs; // directories containing service descriptions
896 dirload_service_set() : service_set()
901 dirload_service_set(const dirload_service_set &) = delete;
903 // Construct a dirload_service_set which loads services from the specified directory. The
904 // directory specified can be dynamically allocated via "new char[...]" (dyn_allocd == true)
905 // or statically allocated.
906 dirload_service_set(const char *service_dir_p, bool dyn_allocd = false) : service_set()
908 service_dirs.emplace_back(service_dir_p, false);
911 // Append a directory to the list of service directories, so that it is searched last for
912 // service description files.
913 void add_service_dir(const char *service_dir_p, bool dyn_allocd = true)
915 service_dirs.emplace_back(service_dir_p, dyn_allocd);
918 service_record *load_service(const char *name) override;