1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
7 #include <sys/inotify.h>
9 #include <sys/reboot.h>
10 #include <sys/timerfd.h>
18 #include "sd-daemon.h"
19 #include "sd-messages.h"
22 #include "all-units.h"
23 #include "alloc-util.h"
25 #include "boot-timestamps.h"
26 #include "bus-common-errors.h"
27 #include "bus-error.h"
28 #include "bus-kernel.h"
30 #include "clean-ipc.h"
31 #include "clock-util.h"
32 #include "core-varlink.h"
33 #include "creds-util.h"
35 #include "dbus-manager.h"
36 #include "dbus-unit.h"
39 #include "dirent-util.h"
42 #include "exec-util.h"
44 #include "exit-status.h"
48 #include "generator-setup.h"
53 #include "load-fragment.h"
54 #include "locale-setup.h"
58 #include "manager-dump.h"
59 #include "manager-serialize.h"
60 #include "memory-util.h"
62 #include "parse-util.h"
63 #include "path-lookup.h"
64 #include "path-util.h"
65 #include "process-util.h"
66 #include "ratelimit.h"
67 #include "rlimit-util.h"
69 #include "selinux-util.h"
70 #include "signal-util.h"
71 #include "socket-util.h"
73 #include "stat-util.h"
74 #include "string-table.h"
75 #include "string-util.h"
78 #include "sysctl-util.h"
79 #include "syslog-util.h"
80 #include "terminal-util.h"
81 #include "time-util.h"
82 #include "transaction.h"
83 #include "umask-util.h"
84 #include "unit-name.h"
85 #include "user-util.h"
89 #define NOTIFY_RCVBUF_SIZE (8*1024*1024)
90 #define CGROUPS_AGENT_RCVBUF_SIZE (8*1024*1024)
92 /* Initial delay and the interval for printing status messages about running jobs */
93 #define JOBS_IN_PROGRESS_WAIT_USEC (2*USEC_PER_SEC)
94 #define JOBS_IN_PROGRESS_QUIET_WAIT_USEC (25*USEC_PER_SEC)
95 #define JOBS_IN_PROGRESS_PERIOD_USEC (USEC_PER_SEC / 3)
96 #define JOBS_IN_PROGRESS_PERIOD_DIVISOR 3
98 /* If there are more than 1K bus messages queue across our API and direct buses, then let's not add more on top until
99 * the queue gets more empty. */
100 #define MANAGER_BUS_BUSY_THRESHOLD 1024LU
102 /* How many units and jobs to process of the bus queue before returning to the event loop. */
103 #define MANAGER_BUS_MESSAGE_BUDGET 100U
105 static int manager_dispatch_notify_fd(sd_event_source
*source
, int fd
, uint32_t revents
, void *userdata
);
106 static int manager_dispatch_cgroups_agent_fd(sd_event_source
*source
, int fd
, uint32_t revents
, void *userdata
);
107 static int manager_dispatch_signal_fd(sd_event_source
*source
, int fd
, uint32_t revents
, void *userdata
);
108 static int manager_dispatch_time_change_fd(sd_event_source
*source
, int fd
, uint32_t revents
, void *userdata
);
109 static int manager_dispatch_idle_pipe_fd(sd_event_source
*source
, int fd
, uint32_t revents
, void *userdata
);
110 static int manager_dispatch_user_lookup_fd(sd_event_source
*source
, int fd
, uint32_t revents
, void *userdata
);
111 static int manager_dispatch_jobs_in_progress(sd_event_source
*source
, usec_t usec
, void *userdata
);
112 static int manager_dispatch_run_queue(sd_event_source
*source
, void *userdata
);
113 static int manager_dispatch_sigchld(sd_event_source
*source
, void *userdata
);
114 static int manager_dispatch_timezone_change(sd_event_source
*source
, const struct inotify_event
*event
, void *userdata
);
115 static int manager_run_environment_generators(Manager
*m
);
116 static int manager_run_generators(Manager
*m
);
117 static void manager_vacuum(Manager
*m
);
119 static usec_t
manager_watch_jobs_next_time(Manager
*m
) {
122 if (MANAGER_IS_USER(m
))
123 /* Let the user manager without a timeout show status quickly, so the system manager can make
124 * use of it, if it wants to. */
125 timeout
= JOBS_IN_PROGRESS_WAIT_USEC
* 2 / 3;
126 else if (show_status_on(m
->show_status
))
127 /* When status is on, just use the usual timeout. */
128 timeout
= JOBS_IN_PROGRESS_WAIT_USEC
;
130 timeout
= JOBS_IN_PROGRESS_QUIET_WAIT_USEC
;
132 return usec_add(now(CLOCK_MONOTONIC
), timeout
);
135 static void manager_watch_jobs_in_progress(Manager
*m
) {
141 /* We do not want to show the cylon animation if the user
142 * needs to confirm service executions otherwise confirmation
143 * messages will be screwed by the cylon animation. */
144 if (!manager_is_confirm_spawn_disabled(m
))
147 if (m
->jobs_in_progress_event_source
)
150 next
= manager_watch_jobs_next_time(m
);
151 r
= sd_event_add_time(
153 &m
->jobs_in_progress_event_source
,
156 manager_dispatch_jobs_in_progress
, m
);
160 (void) sd_event_source_set_description(m
->jobs_in_progress_event_source
, "manager-jobs-in-progress");
163 #define CYLON_BUFFER_EXTRA (2*STRLEN(ANSI_RED) + STRLEN(ANSI_HIGHLIGHT_RED) + 2*STRLEN(ANSI_NORMAL))
165 static void draw_cylon(char buffer
[], size_t buflen
, unsigned width
, unsigned pos
) {
168 assert(buflen
>= CYLON_BUFFER_EXTRA
+ width
+ 1);
169 assert(pos
<= width
+1); /* 0 or width+1 mean that the center light is behind the corner */
173 p
= mempset(p
, ' ', pos
-2);
174 if (log_get_show_color())
175 p
= stpcpy(p
, ANSI_RED
);
179 if (pos
> 0 && pos
<= width
) {
180 if (log_get_show_color())
181 p
= stpcpy(p
, ANSI_HIGHLIGHT_RED
);
185 if (log_get_show_color())
186 p
= stpcpy(p
, ANSI_NORMAL
);
189 if (log_get_show_color())
190 p
= stpcpy(p
, ANSI_RED
);
193 p
= mempset(p
, ' ', width
-1-pos
);
194 if (log_get_show_color())
195 strcpy(p
, ANSI_NORMAL
);
199 static void manager_flip_auto_status(Manager
*m
, bool enable
, const char *reason
) {
203 if (m
->show_status
== SHOW_STATUS_AUTO
)
204 manager_set_show_status(m
, SHOW_STATUS_TEMPORARY
, reason
);
206 if (m
->show_status
== SHOW_STATUS_TEMPORARY
)
207 manager_set_show_status(m
, SHOW_STATUS_AUTO
, reason
);
211 static void manager_print_jobs_in_progress(Manager
*m
) {
213 unsigned counter
= 0, print_nr
;
214 char cylon
[6 + CYLON_BUFFER_EXTRA
+ 1];
219 assert(m
->n_running_jobs
> 0);
221 manager_flip_auto_status(m
, true, "delay");
223 print_nr
= (m
->jobs_in_progress_iteration
/ JOBS_IN_PROGRESS_PERIOD_DIVISOR
) % m
->n_running_jobs
;
225 HASHMAP_FOREACH(j
, m
->jobs
)
226 if (j
->state
== JOB_RUNNING
&& counter
++ == print_nr
)
229 /* m->n_running_jobs must be consistent with the contents of m->jobs,
230 * so the above loop must have succeeded in finding j. */
231 assert(counter
== print_nr
+ 1);
234 cylon_pos
= m
->jobs_in_progress_iteration
% 14;
236 cylon_pos
= 14 - cylon_pos
;
237 draw_cylon(cylon
, sizeof(cylon
), 6, cylon_pos
);
239 m
->jobs_in_progress_iteration
++;
241 char job_of_n
[STRLEN("( of ) ") + DECIMAL_STR_MAX(unsigned)*2] = "";
242 if (m
->n_running_jobs
> 1)
243 xsprintf(job_of_n
, "(%u of %u) ", counter
, m
->n_running_jobs
);
245 bool have_timeout
= job_get_timeout(j
, &x
) > 0;
247 /* We want to use enough information for the user to identify previous lines talking about the same
248 * unit, but keep the message as short as possible. So if 'Starting foo.service' or 'Starting
249 * foo.service - Description' were used, 'foo.service' is enough here. On the other hand, if we used
250 * 'Starting Description' before, then we shall also use 'Description' here. So we pass NULL as the
251 * second argument to unit_status_string(). */
252 const char *ident
= unit_status_string(j
->unit
, NULL
);
254 const char *time
= FORMAT_TIMESPAN(now(CLOCK_MONOTONIC
) - j
->begin_usec
, 1*USEC_PER_SEC
);
255 const char *limit
= have_timeout
? FORMAT_TIMESPAN(x
- j
->begin_usec
, 1*USEC_PER_SEC
) : "no limit";
257 if (m
->status_unit_format
== STATUS_UNIT_FORMAT_DESCRIPTION
)
258 /* When using 'Description', we effectively don't have enough space to show the nested status
259 * without ellipsization, so let's not even try. */
260 manager_status_printf(m
, STATUS_TYPE_EPHEMERAL
, cylon
,
261 "%sA %s job is running for %s (%s / %s)",
263 job_type_to_string(j
->type
),
267 const char *status_text
= unit_status_text(j
->unit
);
269 manager_status_printf(m
, STATUS_TYPE_EPHEMERAL
, cylon
,
270 "%sJob %s/%s running (%s / %s)%s%s",
273 job_type_to_string(j
->type
),
275 status_text
? ": " : "",
276 strempty(status_text
));
280 "STATUS=%sUser job %s/%s running (%s / %s)...",
283 job_type_to_string(j
->type
),
285 m
->status_ready
= false;
288 static int have_ask_password(void) {
289 _cleanup_closedir_
DIR *dir
= NULL
;
292 dir
= opendir("/run/systemd/ask-password");
300 FOREACH_DIRENT_ALL(de
, dir
, return -errno
) {
301 if (startswith(de
->d_name
, "ask."))
307 static int manager_dispatch_ask_password_fd(sd_event_source
*source
,
308 int fd
, uint32_t revents
, void *userdata
) {
309 Manager
*m
= userdata
;
315 m
->have_ask_password
= have_ask_password();
316 if (m
->have_ask_password
< 0)
317 /* Log error but continue. Negative have_ask_password
318 * is treated as unknown status. */
319 log_error_errno(m
->have_ask_password
, "Failed to list /run/systemd/ask-password: %m");
324 static void manager_close_ask_password(Manager
*m
) {
327 m
->ask_password_event_source
= sd_event_source_disable_unref(m
->ask_password_event_source
);
328 m
->ask_password_inotify_fd
= safe_close(m
->ask_password_inotify_fd
);
329 m
->have_ask_password
= -EINVAL
;
332 static int manager_check_ask_password(Manager
*m
) {
337 if (!m
->ask_password_event_source
) {
338 assert(m
->ask_password_inotify_fd
< 0);
340 (void) mkdir_p_label("/run/systemd/ask-password", 0755);
342 m
->ask_password_inotify_fd
= inotify_init1(IN_NONBLOCK
|IN_CLOEXEC
);
343 if (m
->ask_password_inotify_fd
< 0)
344 return log_error_errno(errno
, "Failed to create inotify object: %m");
346 r
= inotify_add_watch_and_warn(m
->ask_password_inotify_fd
,
347 "/run/systemd/ask-password",
348 IN_CREATE
|IN_DELETE
|IN_MOVE
);
350 manager_close_ask_password(m
);
354 r
= sd_event_add_io(m
->event
, &m
->ask_password_event_source
,
355 m
->ask_password_inotify_fd
, EPOLLIN
,
356 manager_dispatch_ask_password_fd
, m
);
358 log_error_errno(r
, "Failed to add event source for /run/systemd/ask-password: %m");
359 manager_close_ask_password(m
);
363 (void) sd_event_source_set_description(m
->ask_password_event_source
, "manager-ask-password");
365 /* Queries might have been added meanwhile... */
366 manager_dispatch_ask_password_fd(m
->ask_password_event_source
,
367 m
->ask_password_inotify_fd
, EPOLLIN
, m
);
370 return m
->have_ask_password
;
373 static int manager_watch_idle_pipe(Manager
*m
) {
378 if (m
->idle_pipe_event_source
)
381 if (m
->idle_pipe
[2] < 0)
384 r
= sd_event_add_io(m
->event
, &m
->idle_pipe_event_source
, m
->idle_pipe
[2], EPOLLIN
, manager_dispatch_idle_pipe_fd
, m
);
386 return log_error_errno(r
, "Failed to watch idle pipe: %m");
388 (void) sd_event_source_set_description(m
->idle_pipe_event_source
, "manager-idle-pipe");
393 static void manager_close_idle_pipe(Manager
*m
) {
396 m
->idle_pipe_event_source
= sd_event_source_disable_unref(m
->idle_pipe_event_source
);
398 safe_close_pair(m
->idle_pipe
);
399 safe_close_pair(m
->idle_pipe
+ 2);
402 static int manager_setup_time_change(Manager
*m
) {
407 if (MANAGER_IS_TEST_RUN(m
))
410 m
->time_change_event_source
= sd_event_source_disable_unref(m
->time_change_event_source
);
411 m
->time_change_fd
= safe_close(m
->time_change_fd
);
413 m
->time_change_fd
= time_change_fd();
414 if (m
->time_change_fd
< 0)
415 return log_error_errno(m
->time_change_fd
, "Failed to create timer change timer fd: %m");
417 r
= sd_event_add_io(m
->event
, &m
->time_change_event_source
, m
->time_change_fd
, EPOLLIN
, manager_dispatch_time_change_fd
, m
);
419 return log_error_errno(r
, "Failed to create time change event source: %m");
421 /* Schedule this slightly earlier than the .timer event sources */
422 r
= sd_event_source_set_priority(m
->time_change_event_source
, SD_EVENT_PRIORITY_NORMAL
-1);
424 return log_error_errno(r
, "Failed to set priority of time change event sources: %m");
426 (void) sd_event_source_set_description(m
->time_change_event_source
, "manager-time-change");
428 log_debug("Set up TFD_TIMER_CANCEL_ON_SET timerfd.");
433 static int manager_read_timezone_stat(Manager
*m
) {
439 /* Read the current stat() data of /etc/localtime so that we detect changes */
440 if (lstat("/etc/localtime", &st
) < 0) {
441 log_debug_errno(errno
, "Failed to stat /etc/localtime, ignoring: %m");
442 changed
= m
->etc_localtime_accessible
;
443 m
->etc_localtime_accessible
= false;
447 k
= timespec_load(&st
.st_mtim
);
448 changed
= !m
->etc_localtime_accessible
|| k
!= m
->etc_localtime_mtime
;
450 m
->etc_localtime_mtime
= k
;
451 m
->etc_localtime_accessible
= true;
457 static int manager_setup_timezone_change(Manager
*m
) {
458 _cleanup_(sd_event_source_unrefp
) sd_event_source
*new_event
= NULL
;
463 if (MANAGER_IS_TEST_RUN(m
))
466 /* We watch /etc/localtime for three events: change of the link count (which might mean removal from /etc even
467 * though another link might be kept), renames, and file close operations after writing. Note we don't bother
468 * with IN_DELETE_SELF, as that would just report when the inode is removed entirely, i.e. after the link count
469 * went to zero and all fds to it are closed.
471 * Note that we never follow symlinks here. This is a simplification, but should cover almost all cases
474 * Note that we create the new event source first here, before releasing the old one. This should optimize
475 * behaviour as this way sd-event can reuse the old watch in case the inode didn't change. */
477 r
= sd_event_add_inotify(m
->event
, &new_event
, "/etc/localtime",
478 IN_ATTRIB
|IN_MOVE_SELF
|IN_CLOSE_WRITE
|IN_DONT_FOLLOW
, manager_dispatch_timezone_change
, m
);
480 /* If the file doesn't exist yet, subscribe to /etc instead, and wait until it is created either by
481 * O_CREATE or by rename() */
483 log_debug_errno(r
, "/etc/localtime doesn't exist yet, watching /etc instead.");
484 r
= sd_event_add_inotify(m
->event
, &new_event
, "/etc",
485 IN_CREATE
|IN_MOVED_TO
|IN_ONLYDIR
, manager_dispatch_timezone_change
, m
);
488 return log_error_errno(r
, "Failed to create timezone change event source: %m");
490 /* Schedule this slightly earlier than the .timer event sources */
491 r
= sd_event_source_set_priority(new_event
, SD_EVENT_PRIORITY_NORMAL
-1);
493 return log_error_errno(r
, "Failed to set priority of timezone change event sources: %m");
495 sd_event_source_unref(m
->timezone_change_event_source
);
496 m
->timezone_change_event_source
= TAKE_PTR(new_event
);
501 static int enable_special_signals(Manager
*m
) {
502 _cleanup_close_
int fd
= -1;
506 if (MANAGER_IS_TEST_RUN(m
))
509 /* Enable that we get SIGINT on control-alt-del. In containers
510 * this will fail with EPERM (older) or EINVAL (newer), so
512 if (reboot(RB_DISABLE_CAD
) < 0 && !IN_SET(errno
, EPERM
, EINVAL
))
513 log_warning_errno(errno
, "Failed to enable ctrl-alt-del handling: %m");
515 fd
= open_terminal("/dev/tty0", O_RDWR
|O_NOCTTY
|O_CLOEXEC
);
517 /* Support systems without virtual console */
519 log_warning_errno(errno
, "Failed to open /dev/tty0: %m");
521 /* Enable that we get SIGWINCH on kbrequest */
522 if (ioctl(fd
, KDSIGACCEPT
, SIGWINCH
) < 0)
523 log_warning_errno(errno
, "Failed to enable kbrequest handling: %m");
529 #define RTSIG_IF_AVAILABLE(signum) (signum <= SIGRTMAX ? signum : -1)
531 static int manager_setup_signals(Manager
*m
) {
532 struct sigaction sa
= {
533 .sa_handler
= SIG_DFL
,
534 .sa_flags
= SA_NOCLDSTOP
|SA_RESTART
,
541 assert_se(sigaction(SIGCHLD
, &sa
, NULL
) == 0);
543 /* We make liberal use of realtime signals here. On
544 * Linux/glibc we have 30 of them (with the exception of Linux
545 * on hppa, see below), between SIGRTMIN+0 ... SIGRTMIN+30
548 assert_se(sigemptyset(&mask
) == 0);
549 sigset_add_many(&mask
,
550 SIGCHLD
, /* Child died */
551 SIGTERM
, /* Reexecute daemon */
552 SIGHUP
, /* Reload configuration */
553 SIGUSR1
, /* systemd: reconnect to D-Bus */
554 SIGUSR2
, /* systemd: dump status */
555 SIGINT
, /* Kernel sends us this on control-alt-del */
556 SIGWINCH
, /* Kernel sends us this on kbrequest (alt-arrowup) */
557 SIGPWR
, /* Some kernel drivers and upsd send us this on power failure */
559 SIGRTMIN
+0, /* systemd: start default.target */
560 SIGRTMIN
+1, /* systemd: isolate rescue.target */
561 SIGRTMIN
+2, /* systemd: isolate emergency.target */
562 SIGRTMIN
+3, /* systemd: start halt.target */
563 SIGRTMIN
+4, /* systemd: start poweroff.target */
564 SIGRTMIN
+5, /* systemd: start reboot.target */
565 SIGRTMIN
+6, /* systemd: start kexec.target */
567 /* ... space for more special targets ... */
569 SIGRTMIN
+13, /* systemd: Immediate halt */
570 SIGRTMIN
+14, /* systemd: Immediate poweroff */
571 SIGRTMIN
+15, /* systemd: Immediate reboot */
572 SIGRTMIN
+16, /* systemd: Immediate kexec */
574 /* ... space for more immediate system state changes ... */
576 SIGRTMIN
+20, /* systemd: enable status messages */
577 SIGRTMIN
+21, /* systemd: disable status messages */
578 SIGRTMIN
+22, /* systemd: set log level to LOG_DEBUG */
579 SIGRTMIN
+23, /* systemd: set log level to LOG_INFO */
580 SIGRTMIN
+24, /* systemd: Immediate exit (--user only) */
581 SIGRTMIN
+25, /* systemd: reexecute manager */
583 /* Apparently Linux on hppa had fewer RT signals until v3.18,
584 * SIGRTMAX was SIGRTMIN+25, and then SIGRTMIN was lowered,
585 * see commit v3.17-7614-g1f25df2eff.
587 * We cannot unconditionally make use of those signals here,
588 * so let's use a runtime check. Since these commands are
589 * accessible by different means and only really a safety
590 * net, the missing functionality on hppa shouldn't matter.
593 RTSIG_IF_AVAILABLE(SIGRTMIN
+26), /* systemd: set log target to journal-or-kmsg */
594 RTSIG_IF_AVAILABLE(SIGRTMIN
+27), /* systemd: set log target to console */
595 RTSIG_IF_AVAILABLE(SIGRTMIN
+28), /* systemd: set log target to kmsg */
596 RTSIG_IF_AVAILABLE(SIGRTMIN
+29), /* systemd: set log target to syslog-or-kmsg (obsolete) */
598 /* ... one free signal here SIGRTMIN+30 ... */
600 assert_se(sigprocmask(SIG_SETMASK
, &mask
, NULL
) == 0);
602 m
->signal_fd
= signalfd(-1, &mask
, SFD_NONBLOCK
|SFD_CLOEXEC
);
603 if (m
->signal_fd
< 0)
606 r
= sd_event_add_io(m
->event
, &m
->signal_event_source
, m
->signal_fd
, EPOLLIN
, manager_dispatch_signal_fd
, m
);
610 (void) sd_event_source_set_description(m
->signal_event_source
, "manager-signal");
612 /* Process signals a bit earlier than the rest of things, but later than notify_fd processing, so that the
613 * notify processing can still figure out to which process/service a message belongs, before we reap the
614 * process. Also, process this before handling cgroup notifications, so that we always collect child exit
615 * status information before detecting that there's no process in a cgroup. */
616 r
= sd_event_source_set_priority(m
->signal_event_source
, SD_EVENT_PRIORITY_NORMAL
-6);
620 if (MANAGER_IS_SYSTEM(m
))
621 return enable_special_signals(m
);
626 static char** sanitize_environment(char **l
) {
628 /* Let's remove some environment variables that we need ourselves to communicate with our clients */
632 "CONFIGURATION_DIRECTORY",
633 "CREDENTIALS_DIRECTORY",
655 /* Let's order the environment alphabetically, just to make it pretty */
659 int manager_default_environment(Manager
*m
) {
664 m
->transient_environment
= strv_free(m
->transient_environment
);
666 if (MANAGER_IS_SYSTEM(m
)) {
667 /* The system manager always starts with a clean
668 * environment for its children. It does not import
669 * the kernel's or the parents' exported variables.
671 * The initial passed environment is untouched to keep
672 * /proc/self/environ valid; it is used for tagging
673 * the init process inside containers. */
674 m
->transient_environment
= strv_new("PATH=" DEFAULT_PATH
);
675 if (!m
->transient_environment
)
678 /* Import locale variables LC_*= from configuration */
679 (void) locale_setup(&m
->transient_environment
);
681 /* The user manager passes its own environment along to its children, except for $PATH. */
682 m
->transient_environment
= strv_copy(environ
);
683 if (!m
->transient_environment
)
686 r
= strv_env_replace_strdup(&m
->transient_environment
, "PATH=" DEFAULT_USER_PATH
);
691 sanitize_environment(m
->transient_environment
);
696 static int manager_setup_prefix(Manager
*m
) {
702 static const struct table_entry paths_system
[_EXEC_DIRECTORY_TYPE_MAX
] = {
703 [EXEC_DIRECTORY_RUNTIME
] = { SD_PATH_SYSTEM_RUNTIME
, NULL
},
704 [EXEC_DIRECTORY_STATE
] = { SD_PATH_SYSTEM_STATE_PRIVATE
, NULL
},
705 [EXEC_DIRECTORY_CACHE
] = { SD_PATH_SYSTEM_STATE_CACHE
, NULL
},
706 [EXEC_DIRECTORY_LOGS
] = { SD_PATH_SYSTEM_STATE_LOGS
, NULL
},
707 [EXEC_DIRECTORY_CONFIGURATION
] = { SD_PATH_SYSTEM_CONFIGURATION
, NULL
},
710 static const struct table_entry paths_user
[_EXEC_DIRECTORY_TYPE_MAX
] = {
711 [EXEC_DIRECTORY_RUNTIME
] = { SD_PATH_USER_RUNTIME
, NULL
},
712 [EXEC_DIRECTORY_STATE
] = { SD_PATH_USER_CONFIGURATION
, NULL
},
713 [EXEC_DIRECTORY_CACHE
] = { SD_PATH_USER_STATE_CACHE
, NULL
},
714 [EXEC_DIRECTORY_LOGS
] = { SD_PATH_USER_CONFIGURATION
, "log" },
715 [EXEC_DIRECTORY_CONFIGURATION
] = { SD_PATH_USER_CONFIGURATION
, NULL
},
720 const struct table_entry
*p
= MANAGER_IS_SYSTEM(m
) ? paths_system
: paths_user
;
723 for (ExecDirectoryType i
= 0; i
< _EXEC_DIRECTORY_TYPE_MAX
; i
++) {
724 r
= sd_path_lookup(p
[i
].type
, p
[i
].suffix
, &m
->prefix
[i
]);
726 return log_warning_errno(r
, "Failed to lookup %s path: %m",
727 exec_directory_type_to_string(i
));
733 static void manager_free_unit_name_maps(Manager
*m
) {
734 m
->unit_id_map
= hashmap_free(m
->unit_id_map
);
735 m
->unit_name_map
= hashmap_free(m
->unit_name_map
);
736 m
->unit_path_cache
= set_free(m
->unit_path_cache
);
737 m
->unit_cache_timestamp_hash
= 0;
740 static int manager_setup_run_queue(Manager
*m
) {
744 assert(!m
->run_queue_event_source
);
746 r
= sd_event_add_defer(m
->event
, &m
->run_queue_event_source
, manager_dispatch_run_queue
, m
);
750 r
= sd_event_source_set_priority(m
->run_queue_event_source
, SD_EVENT_PRIORITY_IDLE
);
754 r
= sd_event_source_set_enabled(m
->run_queue_event_source
, SD_EVENT_OFF
);
758 (void) sd_event_source_set_description(m
->run_queue_event_source
, "manager-run-queue");
763 static int manager_setup_sigchld_event_source(Manager
*m
) {
767 assert(!m
->sigchld_event_source
);
769 r
= sd_event_add_defer(m
->event
, &m
->sigchld_event_source
, manager_dispatch_sigchld
, m
);
773 r
= sd_event_source_set_priority(m
->sigchld_event_source
, SD_EVENT_PRIORITY_NORMAL
-7);
777 r
= sd_event_source_set_enabled(m
->sigchld_event_source
, SD_EVENT_OFF
);
781 (void) sd_event_source_set_description(m
->sigchld_event_source
, "manager-sigchld");
786 int manager_new(UnitFileScope scope
, ManagerTestRunFlags test_run_flags
, Manager
**_m
) {
787 _cleanup_(manager_freep
) Manager
*m
= NULL
;
792 assert(IN_SET(scope
, UNIT_FILE_SYSTEM
, UNIT_FILE_USER
));
799 .unit_file_scope
= scope
,
800 .objective
= _MANAGER_OBJECTIVE_INVALID
,
802 .status_unit_format
= STATUS_UNIT_FORMAT_DEFAULT
,
804 .default_timer_accuracy_usec
= USEC_PER_MINUTE
,
805 .default_memory_accounting
= MEMORY_ACCOUNTING_DEFAULT
,
806 .default_tasks_accounting
= true,
807 .default_tasks_max
= TASKS_MAX_UNSET
,
808 .default_timeout_start_usec
= DEFAULT_TIMEOUT_USEC
,
809 .default_timeout_stop_usec
= DEFAULT_TIMEOUT_USEC
,
810 .default_restart_usec
= DEFAULT_RESTART_USEC
,
812 .original_log_level
= -1,
813 .original_log_target
= _LOG_TARGET_INVALID
,
815 .watchdog_overridden
[WATCHDOG_RUNTIME
] = USEC_INFINITY
,
816 .watchdog_overridden
[WATCHDOG_REBOOT
] = USEC_INFINITY
,
817 .watchdog_overridden
[WATCHDOG_KEXEC
] = USEC_INFINITY
,
819 .show_status_overridden
= _SHOW_STATUS_INVALID
,
822 .cgroups_agent_fd
= -1,
824 .time_change_fd
= -1,
825 .user_lookup_fds
= { -1, -1 },
826 .private_listen_fd
= -1,
828 .cgroup_inotify_fd
= -1,
829 .pin_cgroupfs_fd
= -1,
830 .ask_password_inotify_fd
= -1,
831 .idle_pipe
= { -1, -1, -1, -1},
833 /* start as id #1, so that we can leave #0 around as "null-like" value */
836 .have_ask_password
= -EINVAL
, /* we don't know */
838 .test_run_flags
= test_run_flags
,
840 .default_oom_policy
= OOM_STOP
,
844 if (MANAGER_IS_SYSTEM(m
) && detect_container() <= 0)
845 boot_timestamps(m
->timestamps
+ MANAGER_TIMESTAMP_USERSPACE
,
846 m
->timestamps
+ MANAGER_TIMESTAMP_FIRMWARE
,
847 m
->timestamps
+ MANAGER_TIMESTAMP_LOADER
);
850 /* Prepare log fields we can use for structured logging */
851 if (MANAGER_IS_SYSTEM(m
)) {
852 m
->unit_log_field
= "UNIT=";
853 m
->unit_log_format_string
= "UNIT=%s";
855 m
->invocation_log_field
= "INVOCATION_ID=";
856 m
->invocation_log_format_string
= "INVOCATION_ID=%s";
858 m
->unit_log_field
= "USER_UNIT=";
859 m
->unit_log_format_string
= "USER_UNIT=%s";
861 m
->invocation_log_field
= "USER_INVOCATION_ID=";
862 m
->invocation_log_format_string
= "USER_INVOCATION_ID=%s";
865 /* Reboot immediately if the user hits C-A-D more often than 7x per 2s */
866 m
->ctrl_alt_del_ratelimit
= (RateLimit
) { .interval
= 2 * USEC_PER_SEC
, .burst
= 7 };
868 r
= manager_default_environment(m
);
872 r
= hashmap_ensure_allocated(&m
->units
, &string_hash_ops
);
876 r
= hashmap_ensure_allocated(&m
->cgroup_unit
, &path_hash_ops
);
880 r
= hashmap_ensure_allocated(&m
->watch_bus
, &string_hash_ops
);
884 r
= prioq_ensure_allocated(&m
->run_queue
, compare_job_priority
);
888 r
= manager_setup_prefix(m
);
892 r
= get_credentials_dir(&e
);
894 m
->received_credentials
= strdup(e
);
895 if (!m
->received_credentials
)
899 r
= sd_event_default(&m
->event
);
903 r
= manager_setup_run_queue(m
);
907 if (FLAGS_SET(test_run_flags
, MANAGER_TEST_RUN_MINIMAL
)) {
908 m
->cgroup_root
= strdup("");
912 r
= manager_setup_signals(m
);
916 r
= manager_setup_cgroup(m
);
920 r
= manager_setup_time_change(m
);
924 r
= manager_read_timezone_stat(m
);
928 (void) manager_setup_timezone_change(m
);
930 r
= manager_setup_sigchld_event_source(m
);
935 if (test_run_flags
== 0) {
936 if (MANAGER_IS_SYSTEM(m
))
937 r
= mkdir_label("/run/systemd/units", 0755);
939 _cleanup_free_
char *units_path
= NULL
;
940 r
= xdg_user_runtime_dir(&units_path
, "/systemd/units");
943 r
= mkdir_p_label(units_path
, 0755);
946 if (r
< 0 && r
!= -EEXIST
)
952 dir_is_empty("/usr") > 0;
954 /* Note that we do not set up the notify fd here. We do that after deserialization,
955 * since they might have gotten serialized across the reexec. */
962 static int manager_setup_notify(Manager
*m
) {
965 if (MANAGER_IS_TEST_RUN(m
))
968 if (m
->notify_fd
< 0) {
969 _cleanup_close_
int fd
= -1;
970 union sockaddr_union sa
;
973 /* First free all secondary fields */
974 m
->notify_socket
= mfree(m
->notify_socket
);
975 m
->notify_event_source
= sd_event_source_disable_unref(m
->notify_event_source
);
977 fd
= socket(AF_UNIX
, SOCK_DGRAM
|SOCK_CLOEXEC
|SOCK_NONBLOCK
, 0);
979 return log_error_errno(errno
, "Failed to allocate notification socket: %m");
981 fd_inc_rcvbuf(fd
, NOTIFY_RCVBUF_SIZE
);
983 m
->notify_socket
= path_join(m
->prefix
[EXEC_DIRECTORY_RUNTIME
], "systemd/notify");
984 if (!m
->notify_socket
)
987 r
= sockaddr_un_set_path(&sa
.un
, m
->notify_socket
);
989 return log_error_errno(r
, "Notify socket '%s' not valid for AF_UNIX socket address, refusing.",
993 (void) mkdir_parents_label(m
->notify_socket
, 0755);
994 (void) sockaddr_un_unlink(&sa
.un
);
996 r
= mac_selinux_bind(fd
, &sa
.sa
, sa_len
);
998 return log_error_errno(r
, "bind(%s) failed: %m", m
->notify_socket
);
1000 r
= setsockopt_int(fd
, SOL_SOCKET
, SO_PASSCRED
, true);
1002 return log_error_errno(r
, "SO_PASSCRED failed: %m");
1004 m
->notify_fd
= TAKE_FD(fd
);
1006 log_debug("Using notification socket %s", m
->notify_socket
);
1009 if (!m
->notify_event_source
) {
1010 r
= sd_event_add_io(m
->event
, &m
->notify_event_source
, m
->notify_fd
, EPOLLIN
, manager_dispatch_notify_fd
, m
);
1012 return log_error_errno(r
, "Failed to allocate notify event source: %m");
1014 /* Process notification messages a bit earlier than SIGCHLD, so that we can still identify to which
1015 * service an exit message belongs. */
1016 r
= sd_event_source_set_priority(m
->notify_event_source
, SD_EVENT_PRIORITY_NORMAL
-8);
1018 return log_error_errno(r
, "Failed to set priority of notify event source: %m");
1020 (void) sd_event_source_set_description(m
->notify_event_source
, "manager-notify");
1026 static int manager_setup_cgroups_agent(Manager
*m
) {
1028 static const union sockaddr_union sa
= {
1029 .un
.sun_family
= AF_UNIX
,
1030 .un
.sun_path
= "/run/systemd/cgroups-agent",
1034 /* This creates a listening socket we receive cgroups agent messages on. We do not use D-Bus for delivering
1035 * these messages from the cgroups agent binary to PID 1, as the cgroups agent binary is very short-living, and
1036 * each instance of it needs a new D-Bus connection. Since D-Bus connections are SOCK_STREAM/AF_UNIX, on
1037 * overloaded systems the backlog of the D-Bus socket becomes relevant, as not more than the configured number
1038 * of D-Bus connections may be queued until the kernel will start dropping further incoming connections,
1039 * possibly resulting in lost cgroups agent messages. To avoid this, we'll use a private SOCK_DGRAM/AF_UNIX
1040 * socket, where no backlog is relevant as communication may take place without an actual connect() cycle, and
1041 * we thus won't lose messages.
1043 * Note that PID 1 will forward the agent message to system bus, so that the user systemd instance may listen
1044 * to it. The system instance hence listens on this special socket, but the user instances listen on the system
1045 * bus for these messages. */
1047 if (MANAGER_IS_TEST_RUN(m
))
1050 if (!MANAGER_IS_SYSTEM(m
))
1053 r
= cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER
);
1055 return log_error_errno(r
, "Failed to determine whether unified cgroups hierarchy is used: %m");
1056 if (r
> 0) /* We don't need this anymore on the unified hierarchy */
1059 if (m
->cgroups_agent_fd
< 0) {
1060 _cleanup_close_
int fd
= -1;
1062 /* First free all secondary fields */
1063 m
->cgroups_agent_event_source
= sd_event_source_disable_unref(m
->cgroups_agent_event_source
);
1065 fd
= socket(AF_UNIX
, SOCK_DGRAM
|SOCK_CLOEXEC
|SOCK_NONBLOCK
, 0);
1067 return log_error_errno(errno
, "Failed to allocate cgroups agent socket: %m");
1069 fd_inc_rcvbuf(fd
, CGROUPS_AGENT_RCVBUF_SIZE
);
1071 (void) sockaddr_un_unlink(&sa
.un
);
1073 /* Only allow root to connect to this socket */
1074 RUN_WITH_UMASK(0077)
1075 r
= bind(fd
, &sa
.sa
, SOCKADDR_UN_LEN(sa
.un
));
1077 return log_error_errno(errno
, "bind(%s) failed: %m", sa
.un
.sun_path
);
1079 m
->cgroups_agent_fd
= TAKE_FD(fd
);
1082 if (!m
->cgroups_agent_event_source
) {
1083 r
= sd_event_add_io(m
->event
, &m
->cgroups_agent_event_source
, m
->cgroups_agent_fd
, EPOLLIN
, manager_dispatch_cgroups_agent_fd
, m
);
1085 return log_error_errno(r
, "Failed to allocate cgroups agent event source: %m");
1087 /* Process cgroups notifications early. Note that when the agent notification is received
1088 * we'll just enqueue the unit in the cgroup empty queue, hence pick a high priority than
1089 * that. Also see handling of cgroup inotify for the unified cgroup stuff. */
1090 r
= sd_event_source_set_priority(m
->cgroups_agent_event_source
, SD_EVENT_PRIORITY_NORMAL
-9);
1092 return log_error_errno(r
, "Failed to set priority of cgroups agent event source: %m");
1094 (void) sd_event_source_set_description(m
->cgroups_agent_event_source
, "manager-cgroups-agent");
1100 static int manager_setup_user_lookup_fd(Manager
*m
) {
1105 /* Set up the socket pair used for passing UID/GID resolution results from forked off processes to PID
1106 * 1. Background: we can't do name lookups (NSS) from PID 1, since it might involve IPC and thus activation,
1107 * and we might hence deadlock on ourselves. Hence we do all user/group lookups asynchronously from the forked
1108 * off processes right before executing the binaries to start. In order to be able to clean up any IPC objects
1109 * created by a unit (see RemoveIPC=) we need to know in PID 1 the used UID/GID of the executed processes,
1110 * hence we establish this communication channel so that forked off processes can pass their UID/GID
1111 * information back to PID 1. The forked off processes send their resolved UID/GID to PID 1 in a simple
1112 * datagram, along with their unit name, so that we can share one communication socket pair among all units for
1115 * You might wonder why we need a communication channel for this that is independent of the usual notification
1116 * socket scheme (i.e. $NOTIFY_SOCKET). The primary difference is about trust: data sent via the $NOTIFY_SOCKET
1117 * channel is only accepted if it originates from the right unit and if reception was enabled for it. The user
1118 * lookup socket OTOH is only accessible by PID 1 and its children until they exec(), and always available.
1120 * Note that this function is called under two circumstances: when we first initialize (in which case we
1121 * allocate both the socket pair and the event source to listen on it), and when we deserialize after a reload
1122 * (in which case the socket pair already exists but we still need to allocate the event source for it). */
1124 if (m
->user_lookup_fds
[0] < 0) {
1126 /* Free all secondary fields */
1127 safe_close_pair(m
->user_lookup_fds
);
1128 m
->user_lookup_event_source
= sd_event_source_disable_unref(m
->user_lookup_event_source
);
1130 if (socketpair(AF_UNIX
, SOCK_DGRAM
|SOCK_CLOEXEC
, 0, m
->user_lookup_fds
) < 0)
1131 return log_error_errno(errno
, "Failed to allocate user lookup socket: %m");
1133 (void) fd_inc_rcvbuf(m
->user_lookup_fds
[0], NOTIFY_RCVBUF_SIZE
);
1136 if (!m
->user_lookup_event_source
) {
1137 r
= sd_event_add_io(m
->event
, &m
->user_lookup_event_source
, m
->user_lookup_fds
[0], EPOLLIN
, manager_dispatch_user_lookup_fd
, m
);
1139 return log_error_errno(errno
, "Failed to allocate user lookup event source: %m");
1141 /* Process even earlier than the notify event source, so that we always know first about valid UID/GID
1143 r
= sd_event_source_set_priority(m
->user_lookup_event_source
, SD_EVENT_PRIORITY_NORMAL
-11);
1145 return log_error_errno(errno
, "Failed to set priority of user lookup event source: %m");
1147 (void) sd_event_source_set_description(m
->user_lookup_event_source
, "user-lookup");
1153 static unsigned manager_dispatch_cleanup_queue(Manager
*m
) {
1159 while ((u
= m
->cleanup_queue
)) {
1160 assert(u
->in_cleanup_queue
);
1170 GC_OFFSET_IN_PATH
, /* This one is on the path we were traveling */
1171 GC_OFFSET_UNSURE
, /* No clue */
1172 GC_OFFSET_GOOD
, /* We still need this unit */
1173 GC_OFFSET_BAD
, /* We don't need this unit anymore */
1177 static void unit_gc_mark_good(Unit
*u
, unsigned gc_marker
) {
1180 u
->gc_marker
= gc_marker
+ GC_OFFSET_GOOD
;
1182 /* Recursively mark referenced units as GOOD as well */
1183 UNIT_FOREACH_DEPENDENCY(other
, u
, UNIT_ATOM_REFERENCES
)
1184 if (other
->gc_marker
== gc_marker
+ GC_OFFSET_UNSURE
)
1185 unit_gc_mark_good(other
, gc_marker
);
1188 static void unit_gc_sweep(Unit
*u
, unsigned gc_marker
) {
1194 if (IN_SET(u
->gc_marker
- gc_marker
,
1195 GC_OFFSET_GOOD
, GC_OFFSET_BAD
, GC_OFFSET_UNSURE
, GC_OFFSET_IN_PATH
))
1198 if (u
->in_cleanup_queue
)
1201 if (!unit_may_gc(u
))
1204 u
->gc_marker
= gc_marker
+ GC_OFFSET_IN_PATH
;
1208 UNIT_FOREACH_DEPENDENCY(other
, u
, UNIT_ATOM_REFERENCED_BY
) {
1209 unit_gc_sweep(other
, gc_marker
);
1211 if (other
->gc_marker
== gc_marker
+ GC_OFFSET_GOOD
)
1214 if (other
->gc_marker
!= gc_marker
+ GC_OFFSET_BAD
)
1219 LIST_FOREACH(refs_by_target
, ref
, u
->refs_by_target
) {
1220 unit_gc_sweep(ref
->source
, gc_marker
);
1222 if (ref
->source
->gc_marker
== gc_marker
+ GC_OFFSET_GOOD
)
1225 if (ref
->source
->gc_marker
!= gc_marker
+ GC_OFFSET_BAD
)
1232 /* We were unable to find anything out about this entry, so
1233 * let's investigate it later */
1234 u
->gc_marker
= gc_marker
+ GC_OFFSET_UNSURE
;
1235 unit_add_to_gc_queue(u
);
1239 /* We definitely know that this one is not useful anymore, so
1240 * let's mark it for deletion */
1241 u
->gc_marker
= gc_marker
+ GC_OFFSET_BAD
;
1242 unit_add_to_cleanup_queue(u
);
1246 unit_gc_mark_good(u
, gc_marker
);
1249 static unsigned manager_dispatch_gc_unit_queue(Manager
*m
) {
1250 unsigned n
= 0, gc_marker
;
1255 /* log_debug("Running GC..."); */
1257 m
->gc_marker
+= _GC_OFFSET_MAX
;
1258 if (m
->gc_marker
+ _GC_OFFSET_MAX
<= _GC_OFFSET_MAX
)
1261 gc_marker
= m
->gc_marker
;
1263 while ((u
= m
->gc_unit_queue
)) {
1264 assert(u
->in_gc_queue
);
1266 unit_gc_sweep(u
, gc_marker
);
1268 LIST_REMOVE(gc_queue
, m
->gc_unit_queue
, u
);
1269 u
->in_gc_queue
= false;
1273 if (IN_SET(u
->gc_marker
- gc_marker
,
1274 GC_OFFSET_BAD
, GC_OFFSET_UNSURE
)) {
1276 log_unit_debug(u
, "Collecting.");
1277 u
->gc_marker
= gc_marker
+ GC_OFFSET_BAD
;
1278 unit_add_to_cleanup_queue(u
);
1285 static unsigned manager_dispatch_gc_job_queue(Manager
*m
) {
1291 while ((j
= m
->gc_job_queue
)) {
1292 assert(j
->in_gc_queue
);
1294 LIST_REMOVE(gc_queue
, m
->gc_job_queue
, j
);
1295 j
->in_gc_queue
= false;
1302 log_unit_debug(j
->unit
, "Collecting job.");
1303 (void) job_finish_and_invalidate(j
, JOB_COLLECTED
, false, false);
1309 static unsigned manager_dispatch_stop_when_unneeded_queue(Manager
*m
) {
1316 while ((u
= m
->stop_when_unneeded_queue
)) {
1317 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
1319 assert(u
->in_stop_when_unneeded_queue
);
1320 LIST_REMOVE(stop_when_unneeded_queue
, m
->stop_when_unneeded_queue
, u
);
1321 u
->in_stop_when_unneeded_queue
= false;
1325 if (!unit_is_unneeded(u
))
1328 log_unit_debug(u
, "Unit is not needed anymore.");
1330 /* If stopping a unit fails continuously we might enter a stop loop here, hence stop acting on the
1331 * service being unnecessary after a while. */
1333 if (!ratelimit_below(&u
->auto_start_stop_ratelimit
)) {
1334 log_unit_warning(u
, "Unit not needed anymore, but not stopping since we tried this too often recently.");
1338 /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */
1339 r
= manager_add_job(u
->manager
, JOB_STOP
, u
, JOB_FAIL
, NULL
, &error
, NULL
);
1341 log_unit_warning_errno(u
, r
, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error
, r
));
1347 static unsigned manager_dispatch_start_when_upheld_queue(Manager
*m
) {
1354 while ((u
= m
->start_when_upheld_queue
)) {
1355 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
1356 Unit
*culprit
= NULL
;
1358 assert(u
->in_start_when_upheld_queue
);
1359 LIST_REMOVE(start_when_upheld_queue
, m
->start_when_upheld_queue
, u
);
1360 u
->in_start_when_upheld_queue
= false;
1364 if (!unit_is_upheld_by_active(u
, &culprit
))
1367 log_unit_debug(u
, "Unit is started because upheld by active unit %s.", culprit
->id
);
1369 /* If stopping a unit fails continuously we might enter a stop loop here, hence stop acting on the
1370 * service being unnecessary after a while. */
1372 if (!ratelimit_below(&u
->auto_start_stop_ratelimit
)) {
1373 log_unit_warning(u
, "Unit needs to be started because active unit %s upholds it, but not starting since we tried this too often recently.", culprit
->id
);
1377 r
= manager_add_job(u
->manager
, JOB_START
, u
, JOB_FAIL
, NULL
, &error
, NULL
);
1379 log_unit_warning_errno(u
, r
, "Failed to enqueue start job, ignoring: %s", bus_error_message(&error
, r
));
1385 static unsigned manager_dispatch_stop_when_bound_queue(Manager
*m
) {
1392 while ((u
= m
->stop_when_bound_queue
)) {
1393 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
1394 Unit
*culprit
= NULL
;
1396 assert(u
->in_stop_when_bound_queue
);
1397 LIST_REMOVE(stop_when_bound_queue
, m
->stop_when_bound_queue
, u
);
1398 u
->in_stop_when_bound_queue
= false;
1402 if (!unit_is_bound_by_inactive(u
, &culprit
))
1405 log_unit_debug(u
, "Unit is stopped because bound to inactive unit %s.", culprit
->id
);
1407 /* If stopping a unit fails continuously we might enter a stop loop here, hence stop acting on the
1408 * service being unnecessary after a while. */
1410 if (!ratelimit_below(&u
->auto_start_stop_ratelimit
)) {
1411 log_unit_warning(u
, "Unit needs to be stopped because it is bound to inactive unit %s it, but not stopping since we tried this too often recently.", culprit
->id
);
1415 r
= manager_add_job(u
->manager
, JOB_STOP
, u
, JOB_REPLACE
, NULL
, &error
, NULL
);
1417 log_unit_warning_errno(u
, r
, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error
, r
));
1423 static void manager_clear_jobs_and_units(Manager
*m
) {
1428 while ((u
= hashmap_first(m
->units
)))
1431 manager_dispatch_cleanup_queue(m
);
1433 assert(!m
->load_queue
);
1434 assert(prioq_isempty(m
->run_queue
));
1435 assert(!m
->dbus_unit_queue
);
1436 assert(!m
->dbus_job_queue
);
1437 assert(!m
->cleanup_queue
);
1438 assert(!m
->gc_unit_queue
);
1439 assert(!m
->gc_job_queue
);
1440 assert(!m
->cgroup_realize_queue
);
1441 assert(!m
->cgroup_empty_queue
);
1442 assert(!m
->cgroup_oom_queue
);
1443 assert(!m
->target_deps_queue
);
1444 assert(!m
->stop_when_unneeded_queue
);
1445 assert(!m
->start_when_upheld_queue
);
1446 assert(!m
->stop_when_bound_queue
);
1448 assert(hashmap_isempty(m
->jobs
));
1449 assert(hashmap_isempty(m
->units
));
1451 m
->n_on_console
= 0;
1452 m
->n_running_jobs
= 0;
1453 m
->n_installed_jobs
= 0;
1454 m
->n_failed_jobs
= 0;
1457 Manager
* manager_free(Manager
*m
) {
1461 manager_clear_jobs_and_units(m
);
1463 for (UnitType c
= 0; c
< _UNIT_TYPE_MAX
; c
++)
1464 if (unit_vtable
[c
]->shutdown
)
1465 unit_vtable
[c
]->shutdown(m
);
1467 /* Keep the cgroup hierarchy in place except when we know we are going down for good */
1468 manager_shutdown_cgroup(m
, IN_SET(m
->objective
, MANAGER_EXIT
, MANAGER_REBOOT
, MANAGER_POWEROFF
, MANAGER_HALT
, MANAGER_KEXEC
));
1470 lookup_paths_flush_generator(&m
->lookup_paths
);
1473 manager_varlink_done(m
);
1475 exec_runtime_vacuum(m
);
1476 hashmap_free(m
->exec_runtime_by_id
);
1478 dynamic_user_vacuum(m
, false);
1479 hashmap_free(m
->dynamic_users
);
1481 hashmap_free(m
->units
);
1482 hashmap_free(m
->units_by_invocation_id
);
1483 hashmap_free(m
->jobs
);
1484 hashmap_free(m
->watch_pids
);
1485 hashmap_free(m
->watch_bus
);
1487 prioq_free(m
->run_queue
);
1489 set_free(m
->startup_units
);
1490 set_free(m
->failed_units
);
1492 sd_event_source_unref(m
->signal_event_source
);
1493 sd_event_source_unref(m
->sigchld_event_source
);
1494 sd_event_source_unref(m
->notify_event_source
);
1495 sd_event_source_unref(m
->cgroups_agent_event_source
);
1496 sd_event_source_unref(m
->time_change_event_source
);
1497 sd_event_source_unref(m
->timezone_change_event_source
);
1498 sd_event_source_unref(m
->jobs_in_progress_event_source
);
1499 sd_event_source_unref(m
->run_queue_event_source
);
1500 sd_event_source_unref(m
->user_lookup_event_source
);
1502 safe_close(m
->signal_fd
);
1503 safe_close(m
->notify_fd
);
1504 safe_close(m
->cgroups_agent_fd
);
1505 safe_close(m
->time_change_fd
);
1506 safe_close_pair(m
->user_lookup_fds
);
1508 manager_close_ask_password(m
);
1510 manager_close_idle_pipe(m
);
1512 sd_event_unref(m
->event
);
1514 free(m
->notify_socket
);
1516 lookup_paths_free(&m
->lookup_paths
);
1517 strv_free(m
->transient_environment
);
1518 strv_free(m
->client_environment
);
1520 hashmap_free(m
->cgroup_unit
);
1521 manager_free_unit_name_maps(m
);
1523 free(m
->switch_root
);
1524 free(m
->switch_root_init
);
1526 rlimit_free_all(m
->rlimit
);
1528 assert(hashmap_isempty(m
->units_requiring_mounts_for
));
1529 hashmap_free(m
->units_requiring_mounts_for
);
1531 hashmap_free(m
->uid_refs
);
1532 hashmap_free(m
->gid_refs
);
1534 for (ExecDirectoryType dt
= 0; dt
< _EXEC_DIRECTORY_TYPE_MAX
; dt
++)
1535 m
->prefix
[dt
] = mfree(m
->prefix
[dt
]);
1536 free(m
->received_credentials
);
1541 static void manager_enumerate_perpetual(Manager
*m
) {
1544 if (FLAGS_SET(m
->test_run_flags
, MANAGER_TEST_RUN_MINIMAL
))
1547 /* Let's ask every type to load all units from disk/kernel that it might know */
1548 for (UnitType c
= 0; c
< _UNIT_TYPE_MAX
; c
++) {
1549 if (!unit_type_supported(c
)) {
1550 log_debug("Unit type .%s is not supported on this system.", unit_type_to_string(c
));
1554 if (unit_vtable
[c
]->enumerate_perpetual
)
1555 unit_vtable
[c
]->enumerate_perpetual(m
);
1559 static void manager_enumerate(Manager
*m
) {
1562 if (FLAGS_SET(m
->test_run_flags
, MANAGER_TEST_RUN_MINIMAL
))
1565 /* Let's ask every type to load all units from disk/kernel that it might know */
1566 for (UnitType c
= 0; c
< _UNIT_TYPE_MAX
; c
++) {
1567 if (!unit_type_supported(c
)) {
1568 log_debug("Unit type .%s is not supported on this system.", unit_type_to_string(c
));
1572 if (unit_vtable
[c
]->enumerate
)
1573 unit_vtable
[c
]->enumerate(m
);
1576 manager_dispatch_load_queue(m
);
1579 static void manager_coldplug(Manager
*m
) {
1586 log_debug("Invoking unit coldplug() handlers…");
1588 /* Let's place the units back into their deserialized state */
1589 HASHMAP_FOREACH_KEY(u
, k
, m
->units
) {
1591 /* ignore aliases */
1595 r
= unit_coldplug(u
);
1597 log_warning_errno(r
, "We couldn't coldplug %s, proceeding anyway: %m", u
->id
);
1601 static void manager_catchup(Manager
*m
) {
1607 log_debug("Invoking unit catchup() handlers…");
1609 /* Let's catch up on any state changes that happened while we were reloading/reexecing */
1610 HASHMAP_FOREACH_KEY(u
, k
, m
->units
) {
1612 /* ignore aliases */
1620 static void manager_distribute_fds(Manager
*m
, FDSet
*fds
) {
1625 HASHMAP_FOREACH(u
, m
->units
) {
1627 if (fdset_size(fds
) <= 0)
1630 if (!UNIT_VTABLE(u
)->distribute_fds
)
1633 UNIT_VTABLE(u
)->distribute_fds(u
, fds
);
1637 static bool manager_dbus_is_running(Manager
*m
, bool deserialized
) {
1642 /* This checks whether the dbus instance we are supposed to expose our APIs on is up. We check both the socket
1643 * and the service unit. If the 'deserialized' parameter is true we'll check the deserialized state of the unit
1644 * rather than the current one. */
1646 if (MANAGER_IS_TEST_RUN(m
))
1649 u
= manager_get_unit(m
, SPECIAL_DBUS_SOCKET
);
1652 if ((deserialized
? SOCKET(u
)->deserialized_state
: SOCKET(u
)->state
) != SOCKET_RUNNING
)
1655 u
= manager_get_unit(m
, SPECIAL_DBUS_SERVICE
);
1658 if (!IN_SET((deserialized
? SERVICE(u
)->deserialized_state
: SERVICE(u
)->state
), SERVICE_RUNNING
, SERVICE_RELOAD
))
1664 static void manager_setup_bus(Manager
*m
) {
1667 /* Let's set up our private bus connection now, unconditionally */
1668 (void) bus_init_private(m
);
1670 /* If we are in --user mode also connect to the system bus now */
1671 if (MANAGER_IS_USER(m
))
1672 (void) bus_init_system(m
);
1674 /* Let's connect to the bus now, but only if the unit is supposed to be up */
1675 if (manager_dbus_is_running(m
, MANAGER_IS_RELOADING(m
))) {
1676 (void) bus_init_api(m
);
1678 if (MANAGER_IS_SYSTEM(m
))
1679 (void) bus_init_system(m
);
1683 static void manager_preset_all(Manager
*m
) {
1688 if (m
->first_boot
<= 0)
1691 if (!MANAGER_IS_SYSTEM(m
))
1694 if (MANAGER_IS_TEST_RUN(m
))
1697 /* If this is the first boot, and we are in the host system, then preset everything */
1698 r
= unit_file_preset_all(UNIT_FILE_SYSTEM
, 0, NULL
, UNIT_FILE_PRESET_ENABLE_ONLY
, NULL
, 0);
1700 log_full_errno(r
== -EEXIST
? LOG_NOTICE
: LOG_WARNING
, r
,
1701 "Failed to populate /etc with preset unit settings, ignoring: %m");
1703 log_info("Populated /etc with preset unit settings.");
1706 static void manager_ready(Manager
*m
) {
1709 /* After having loaded everything, do the final round of catching up with what might have changed */
1711 m
->objective
= MANAGER_OK
; /* Tell everyone we are up now */
1713 /* It might be safe to log to the journal now and connect to dbus */
1714 manager_recheck_journal(m
);
1715 manager_recheck_dbus(m
);
1717 /* Let's finally catch up with any changes that took place while we were reloading/reexecing */
1720 m
->honor_device_enumeration
= true;
1723 Manager
* manager_reloading_start(Manager
*m
) {
1727 void manager_reloading_stopp(Manager
**m
) {
1729 assert((*m
)->n_reloading
> 0);
1730 (*m
)->n_reloading
--;
1734 int manager_startup(Manager
*m
, FILE *serialization
, FDSet
*fds
, const char *root
) {
1739 /* If we are running in test mode, we still want to run the generators,
1740 * but we should not touch the real generator directories. */
1741 r
= lookup_paths_init(&m
->lookup_paths
, m
->unit_file_scope
,
1742 MANAGER_IS_TEST_RUN(m
) ? LOOKUP_PATHS_TEMPORARY_GENERATED
: 0,
1745 return log_error_errno(r
, "Failed to initialize path lookup table: %m");
1747 dual_timestamp_get(m
->timestamps
+ manager_timestamp_initrd_mangle(MANAGER_TIMESTAMP_GENERATORS_START
));
1748 r
= manager_run_environment_generators(m
);
1750 r
= manager_run_generators(m
);
1751 dual_timestamp_get(m
->timestamps
+ manager_timestamp_initrd_mangle(MANAGER_TIMESTAMP_GENERATORS_FINISH
));
1755 manager_preset_all(m
);
1757 lookup_paths_log(&m
->lookup_paths
);
1760 /* This block is (optionally) done with the reloading counter bumped */
1761 _cleanup_(manager_reloading_stopp
) Manager
*reloading
= NULL
;
1763 /* If we will deserialize make sure that during enumeration this is already known, so we increase the
1764 * counter here already */
1766 reloading
= manager_reloading_start(m
);
1768 /* First, enumerate what we can from all config files */
1769 dual_timestamp_get(m
->timestamps
+ manager_timestamp_initrd_mangle(MANAGER_TIMESTAMP_UNITS_LOAD_START
));
1770 manager_enumerate_perpetual(m
);
1771 manager_enumerate(m
);
1772 dual_timestamp_get(m
->timestamps
+ manager_timestamp_initrd_mangle(MANAGER_TIMESTAMP_UNITS_LOAD_FINISH
));
1774 /* Second, deserialize if there is something to deserialize */
1775 if (serialization
) {
1776 r
= manager_deserialize(m
, serialization
, fds
);
1778 return log_error_errno(r
, "Deserialization failed: %m");
1781 /* Any fds left? Find some unit which wants them. This is useful to allow container managers to pass
1782 * some file descriptors to us pre-initialized. This enables socket-based activation of entire
1784 manager_distribute_fds(m
, fds
);
1786 /* We might have deserialized the notify fd, but if we didn't then let's create the bus now */
1787 r
= manager_setup_notify(m
);
1789 /* No sense to continue without notifications, our children would fail anyway. */
1792 r
= manager_setup_cgroups_agent(m
);
1794 /* Likewise, no sense to continue without empty cgroup notifications. */
1797 r
= manager_setup_user_lookup_fd(m
);
1799 /* This shouldn't fail, except if things are really broken. */
1802 /* Connect to the bus if we are good for it */
1803 manager_setup_bus(m
);
1805 /* Now that we are connected to all possible buses, let's deserialize who is tracking us. */
1806 r
= bus_track_coldplug(m
, &m
->subscribed
, false, m
->deserialized_subscribed
);
1808 log_warning_errno(r
, "Failed to deserialized tracked clients, ignoring: %m");
1809 m
->deserialized_subscribed
= strv_free(m
->deserialized_subscribed
);
1811 r
= manager_varlink_init(m
);
1813 log_warning_errno(r
, "Failed to set up Varlink server, ignoring: %m");
1815 /* Third, fire things up! */
1816 manager_coldplug(m
);
1818 /* Clean up runtime objects */
1822 /* Let's wait for the UnitNew/JobNew messages being sent, before we notify that the
1823 * reload is finished */
1824 m
->send_reloading_done
= true;
1832 int manager_add_job(
1838 sd_bus_error
*error
,
1845 assert(type
< _JOB_TYPE_MAX
);
1847 assert(mode
< _JOB_MODE_MAX
);
1849 if (mode
== JOB_ISOLATE
&& type
!= JOB_START
)
1850 return sd_bus_error_set(error
, SD_BUS_ERROR_INVALID_ARGS
, "Isolate is only valid for start.");
1852 if (mode
== JOB_ISOLATE
&& !unit
->allow_isolate
)
1853 return sd_bus_error_set(error
, BUS_ERROR_NO_ISOLATION
, "Operation refused, unit may not be isolated.");
1855 if (mode
== JOB_TRIGGERING
&& type
!= JOB_STOP
)
1856 return sd_bus_error_set(error
, SD_BUS_ERROR_INVALID_ARGS
, "--job-mode=triggering is only valid for stop.");
1858 log_unit_debug(unit
, "Trying to enqueue job %s/%s/%s", unit
->id
, job_type_to_string(type
), job_mode_to_string(mode
));
1860 type
= job_type_collapse(type
, unit
);
1862 tr
= transaction_new(mode
== JOB_REPLACE_IRREVERSIBLY
);
1866 r
= transaction_add_job_and_dependencies(tr
, type
, unit
, NULL
, true, false,
1867 IN_SET(mode
, JOB_IGNORE_DEPENDENCIES
, JOB_IGNORE_REQUIREMENTS
),
1868 mode
== JOB_IGNORE_DEPENDENCIES
, error
);
1872 if (mode
== JOB_ISOLATE
) {
1873 r
= transaction_add_isolate_jobs(tr
, m
);
1878 if (mode
== JOB_TRIGGERING
) {
1879 r
= transaction_add_triggering_jobs(tr
, unit
);
1884 r
= transaction_activate(tr
, m
, mode
, affected_jobs
, error
);
1888 log_unit_debug(unit
,
1889 "Enqueued job %s/%s as %u", unit
->id
,
1890 job_type_to_string(type
), (unsigned) tr
->anchor_job
->id
);
1893 *ret
= tr
->anchor_job
;
1895 transaction_free(tr
);
1899 transaction_abort(tr
);
1900 transaction_free(tr
);
1904 int manager_add_job_by_name(Manager
*m
, JobType type
, const char *name
, JobMode mode
, Set
*affected_jobs
, sd_bus_error
*e
, Job
**ret
) {
1905 Unit
*unit
= NULL
; /* just to appease gcc, initialization is not really necessary */
1909 assert(type
< _JOB_TYPE_MAX
);
1911 assert(mode
< _JOB_MODE_MAX
);
1913 r
= manager_load_unit(m
, name
, NULL
, NULL
, &unit
);
1918 return manager_add_job(m
, type
, unit
, mode
, affected_jobs
, e
, ret
);
1921 int manager_add_job_by_name_and_warn(Manager
*m
, JobType type
, const char *name
, JobMode mode
, Set
*affected_jobs
, Job
**ret
) {
1922 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
1926 assert(type
< _JOB_TYPE_MAX
);
1928 assert(mode
< _JOB_MODE_MAX
);
1930 r
= manager_add_job_by_name(m
, type
, name
, mode
, affected_jobs
, &error
, ret
);
1932 return log_warning_errno(r
, "Failed to enqueue %s job for %s: %s", job_mode_to_string(mode
), name
, bus_error_message(&error
, r
));
1937 int manager_propagate_reload(Manager
*m
, Unit
*unit
, JobMode mode
, sd_bus_error
*e
) {
1943 assert(mode
< _JOB_MODE_MAX
);
1944 assert(mode
!= JOB_ISOLATE
); /* Isolate is only valid for start */
1946 tr
= transaction_new(mode
== JOB_REPLACE_IRREVERSIBLY
);
1950 /* We need an anchor job */
1951 r
= transaction_add_job_and_dependencies(tr
, JOB_NOP
, unit
, NULL
, false, false, true, true, e
);
1955 /* Failure in adding individual dependencies is ignored, so this always succeeds. */
1956 transaction_add_propagate_reload_jobs(tr
, unit
, tr
->anchor_job
, mode
== JOB_IGNORE_DEPENDENCIES
, e
);
1958 r
= transaction_activate(tr
, m
, mode
, NULL
, e
);
1962 transaction_free(tr
);
1966 transaction_abort(tr
);
1967 transaction_free(tr
);
1971 Job
*manager_get_job(Manager
*m
, uint32_t id
) {
1974 return hashmap_get(m
->jobs
, UINT32_TO_PTR(id
));
1977 Unit
*manager_get_unit(Manager
*m
, const char *name
) {
1981 return hashmap_get(m
->units
, name
);
1984 static int manager_dispatch_target_deps_queue(Manager
*m
) {
1990 while ((u
= m
->target_deps_queue
)) {
1991 _cleanup_free_ Unit
**targets
= NULL
;
1994 assert(u
->in_target_deps_queue
);
1996 LIST_REMOVE(target_deps_queue
, u
->manager
->target_deps_queue
, u
);
1997 u
->in_target_deps_queue
= false;
1999 /* Take an "atomic" snapshot of dependencies here, as the call below will likely modify the
2000 * dependencies, and we can't have it that hash tables we iterate through are modified while
2001 * we are iterating through them. */
2002 n_targets
= unit_get_dependency_array(u
, UNIT_ATOM_DEFAULT_TARGET_DEPENDENCIES
, &targets
);
2006 for (int i
= 0; i
< n_targets
; i
++) {
2007 r
= unit_add_default_target_dependency(u
, targets
[i
]);
2016 unsigned manager_dispatch_load_queue(Manager
*m
) {
2022 /* Make sure we are not run recursively */
2023 if (m
->dispatching_load_queue
)
2026 m
->dispatching_load_queue
= true;
2028 /* Dispatches the load queue. Takes a unit from the queue and
2029 * tries to load its data until the queue is empty */
2031 while ((u
= m
->load_queue
)) {
2032 assert(u
->in_load_queue
);
2038 m
->dispatching_load_queue
= false;
2040 /* Dispatch the units waiting for their target dependencies to be added now, as all targets that we know about
2041 * should be loaded and have aliases resolved */
2042 (void) manager_dispatch_target_deps_queue(m
);
2047 bool manager_unit_cache_should_retry_load(Unit
*u
) {
2050 /* Automatic reloading from disk only applies to units which were not found sometime in the past, and
2051 * the not-found stub is kept pinned in the unit graph by dependencies. For units that were
2052 * previously loaded, we don't do automatic reloading, and daemon-reload is necessary to update. */
2053 if (u
->load_state
!= UNIT_NOT_FOUND
)
2056 /* The cache has been updated since the last time we tried to load the unit. There might be new
2057 * fragment paths to read. */
2058 if (u
->manager
->unit_cache_timestamp_hash
!= u
->fragment_not_found_timestamp_hash
)
2061 /* The cache needs to be updated because there are modifications on disk. */
2062 return !lookup_paths_timestamp_hash_same(&u
->manager
->lookup_paths
, u
->manager
->unit_cache_timestamp_hash
, NULL
);
2065 int manager_load_unit_prepare(
2072 _cleanup_(unit_freep
) Unit
*cleanup_ret
= NULL
;
2080 /* This will prepare the unit for loading, but not actually load anything from disk. */
2082 if (path
&& !path_is_absolute(path
))
2083 return sd_bus_error_setf(e
, SD_BUS_ERROR_INVALID_ARGS
, "Path %s is not absolute.", path
);
2086 /* 'name' and 'path' must not both be null. Check here 'path' using assert_se() to
2087 * workaround a bug in gcc that generates a -Wnonnull warning when calling basename(),
2088 * but this cannot be possible in any code path (See #6119). */
2090 name
= basename(path
);
2093 t
= unit_name_to_type(name
);
2095 if (t
== _UNIT_TYPE_INVALID
|| !unit_name_is_valid(name
, UNIT_NAME_PLAIN
|UNIT_NAME_INSTANCE
)) {
2096 if (unit_name_is_valid(name
, UNIT_NAME_TEMPLATE
))
2097 return sd_bus_error_setf(e
, SD_BUS_ERROR_INVALID_ARGS
, "Unit name %s is missing the instance name.", name
);
2099 return sd_bus_error_setf(e
, SD_BUS_ERROR_INVALID_ARGS
, "Unit name %s is not valid.", name
);
2102 ret
= manager_get_unit(m
, name
);
2104 /* The time-based cache allows to start new units without daemon-reload,
2105 * but if they are already referenced (because of dependencies or ordering)
2106 * then we have to force a load of the fragment. As an optimization, check
2107 * first if anything in the usual paths was modified since the last time
2108 * the cache was loaded. Also check if the last time an attempt to load the
2109 * unit was made was before the most recent cache refresh, so that we know
2110 * we need to try again — even if the cache is current, it might have been
2111 * updated in a different context before we had a chance to retry loading
2112 * this particular unit. */
2113 if (manager_unit_cache_should_retry_load(ret
))
2114 ret
->load_state
= UNIT_STUB
;
2120 ret
= cleanup_ret
= unit_new(m
, unit_vtable
[t
]->object_size
);
2126 r
= free_and_strdup(&ret
->fragment_path
, path
);
2131 r
= unit_add_name(ret
, name
);
2135 unit_add_to_load_queue(ret
);
2136 unit_add_to_dbus_queue(ret
);
2137 unit_add_to_gc_queue(ret
);
2145 int manager_load_unit(
2157 /* This will load the service information files, but not actually
2158 * start any services or anything. */
2160 r
= manager_load_unit_prepare(m
, name
, path
, e
, _ret
);
2164 manager_dispatch_load_queue(m
);
2166 *_ret
= unit_follow_merge(*_ret
);
2170 int manager_load_startable_unit_or_warn(
2176 /* Load a unit, make sure it loaded fully and is not masked. */
2178 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2182 r
= manager_load_unit(m
, name
, path
, &error
, &unit
);
2184 return log_error_errno(r
, "Failed to load %s %s: %s",
2185 name
? "unit" : "unit file", name
?: path
,
2186 bus_error_message(&error
, r
));
2188 r
= bus_unit_validate_load_state(unit
, &error
);
2190 return log_error_errno(r
, "%s", bus_error_message(&error
, r
));
2196 void manager_clear_jobs(Manager
*m
) {
2201 while ((j
= hashmap_first(m
->jobs
)))
2202 /* No need to recurse. We're cancelling all jobs. */
2203 job_finish_and_invalidate(j
, JOB_CANCELED
, false, false);
2206 void manager_unwatch_pid(Manager
*m
, pid_t pid
) {
2209 /* First let's drop the unit keyed as "pid". */
2210 (void) hashmap_remove(m
->watch_pids
, PID_TO_PTR(pid
));
2212 /* Then, let's also drop the array keyed by -pid. */
2213 free(hashmap_remove(m
->watch_pids
, PID_TO_PTR(-pid
)));
2216 static int manager_dispatch_run_queue(sd_event_source
*source
, void *userdata
) {
2217 Manager
*m
= userdata
;
2223 while ((j
= prioq_peek(m
->run_queue
))) {
2224 assert(j
->installed
);
2225 assert(j
->in_run_queue
);
2227 (void) job_run_and_invalidate(j
);
2230 if (m
->n_running_jobs
> 0)
2231 manager_watch_jobs_in_progress(m
);
2233 if (m
->n_on_console
> 0)
2234 manager_watch_idle_pipe(m
);
2239 static unsigned manager_dispatch_dbus_queue(Manager
*m
) {
2240 unsigned n
= 0, budget
;
2246 /* When we are reloading, let's not wait with generating signals, since we need to exit the manager as quickly
2247 * as we can. There's no point in throttling generation of signals in that case. */
2248 if (MANAGER_IS_RELOADING(m
) || m
->send_reloading_done
|| m
->pending_reload_message
)
2249 budget
= UINT_MAX
; /* infinite budget in this case */
2251 /* Anything to do at all? */
2252 if (!m
->dbus_unit_queue
&& !m
->dbus_job_queue
)
2255 /* Do we have overly many messages queued at the moment? If so, let's not enqueue more on top, let's
2256 * sit this cycle out, and process things in a later cycle when the queues got a bit emptier. */
2257 if (manager_bus_n_queued_write(m
) > MANAGER_BUS_BUSY_THRESHOLD
)
2260 /* Only process a certain number of units/jobs per event loop iteration. Even if the bus queue wasn't
2261 * overly full before this call we shouldn't increase it in size too wildly in one step, and we
2262 * shouldn't monopolize CPU time with generating these messages. Note the difference in counting of
2263 * this "budget" and the "threshold" above: the "budget" is decreased only once per generated message,
2264 * regardless how many buses/direct connections it is enqueued on, while the "threshold" is applied to
2265 * each queued instance of bus message, i.e. if the same message is enqueued to five buses/direct
2266 * connections it will be counted five times. This difference in counting ("references"
2267 * vs. "instances") is primarily a result of the fact that it's easier to implement it this way,
2268 * however it also reflects the thinking that the "threshold" should put a limit on used queue memory,
2269 * i.e. space, while the "budget" should put a limit on time. Also note that the "threshold" is
2270 * currently chosen much higher than the "budget". */
2271 budget
= MANAGER_BUS_MESSAGE_BUDGET
;
2274 while (budget
!= 0 && (u
= m
->dbus_unit_queue
)) {
2276 assert(u
->in_dbus_queue
);
2278 bus_unit_send_change_signal(u
);
2281 if (budget
!= UINT_MAX
)
2285 while (budget
!= 0 && (j
= m
->dbus_job_queue
)) {
2286 assert(j
->in_dbus_queue
);
2288 bus_job_send_change_signal(j
);
2291 if (budget
!= UINT_MAX
)
2295 if (m
->send_reloading_done
) {
2296 m
->send_reloading_done
= false;
2297 bus_manager_send_reloading(m
, false);
2301 if (m
->pending_reload_message
) {
2302 bus_send_pending_reload_message(m
);
2309 static int manager_dispatch_cgroups_agent_fd(sd_event_source
*source
, int fd
, uint32_t revents
, void *userdata
) {
2310 Manager
*m
= userdata
;
2314 n
= recv(fd
, buf
, sizeof(buf
), 0);
2316 return log_error_errno(errno
, "Failed to read cgroups agent message: %m");
2318 log_error("Got zero-length cgroups agent message, ignoring.");
2321 if ((size_t) n
>= sizeof(buf
)) {
2322 log_error("Got overly long cgroups agent message, ignoring.");
2326 if (memchr(buf
, 0, n
)) {
2327 log_error("Got cgroups agent message with embedded NUL byte, ignoring.");
2332 manager_notify_cgroup_empty(m
, buf
);
2333 (void) bus_forward_agent_released(m
, buf
);
2338 static bool manager_process_barrier_fd(char * const *tags
, FDSet
*fds
) {
2340 /* nothing else must be sent when using BARRIER=1 */
2341 if (strv_contains(tags
, "BARRIER=1")) {
2342 if (strv_length(tags
) == 1) {
2343 if (fdset_size(fds
) != 1)
2344 log_warning("Got incorrect number of fds with BARRIER=1, closing them.");
2346 log_warning("Extra notification messages sent with BARRIER=1, ignoring everything.");
2348 /* Drop the message if BARRIER=1 was found */
2355 static void manager_invoke_notify_message(
2358 const struct ucred
*ucred
,
2367 if (u
->notifygen
== m
->notifygen
) /* Already invoked on this same unit in this same iteration? */
2369 u
->notifygen
= m
->notifygen
;
2371 if (UNIT_VTABLE(u
)->notify_message
)
2372 UNIT_VTABLE(u
)->notify_message(u
, ucred
, tags
, fds
);
2374 else if (DEBUG_LOGGING
) {
2375 _cleanup_free_
char *buf
= NULL
, *x
= NULL
, *y
= NULL
;
2377 buf
= strv_join(tags
, ", ");
2379 x
= ellipsize(buf
, 20, 90);
2383 log_unit_debug(u
, "Got notification message \"%s\", ignoring.", strnull(y
));
2387 static int manager_dispatch_notify_fd(sd_event_source
*source
, int fd
, uint32_t revents
, void *userdata
) {
2389 _cleanup_fdset_free_ FDSet
*fds
= NULL
;
2390 Manager
*m
= userdata
;
2391 char buf
[NOTIFY_BUFFER_MAX
+1];
2392 struct iovec iovec
= {
2394 .iov_len
= sizeof(buf
)-1,
2396 CMSG_BUFFER_TYPE(CMSG_SPACE(sizeof(struct ucred
)) +
2397 CMSG_SPACE(sizeof(int) * NOTIFY_FD_MAX
)) control
;
2398 struct msghdr msghdr
= {
2401 .msg_control
= &control
,
2402 .msg_controllen
= sizeof(control
),
2405 struct cmsghdr
*cmsg
;
2406 struct ucred
*ucred
= NULL
;
2407 _cleanup_free_ Unit
**array_copy
= NULL
;
2408 _cleanup_strv_free_
char **tags
= NULL
;
2409 Unit
*u1
, *u2
, **array
;
2410 int r
, *fd_array
= NULL
;
2416 assert(m
->notify_fd
== fd
);
2418 if (revents
!= EPOLLIN
) {
2419 log_warning("Got unexpected poll event for notify fd.");
2423 n
= recvmsg_safe(m
->notify_fd
, &msghdr
, MSG_DONTWAIT
|MSG_CMSG_CLOEXEC
|MSG_TRUNC
);
2424 if (IN_SET(n
, -EAGAIN
, -EINTR
))
2425 return 0; /* Spurious wakeup, try again */
2427 log_warning("Got message with truncated control data (too many fds sent?), ignoring.");
2431 /* If this is any other, real error, then let's stop processing this socket. This of course
2432 * means we won't take notification messages anymore, but that's still better than busy
2433 * looping around this: being woken up over and over again but being unable to actually read
2434 * the message off the socket. */
2435 return log_error_errno(n
, "Failed to receive notification message: %m");
2437 CMSG_FOREACH(cmsg
, &msghdr
) {
2438 if (cmsg
->cmsg_level
== SOL_SOCKET
&& cmsg
->cmsg_type
== SCM_RIGHTS
) {
2441 fd_array
= (int*) CMSG_DATA(cmsg
);
2442 n_fds
= (cmsg
->cmsg_len
- CMSG_LEN(0)) / sizeof(int);
2444 } else if (cmsg
->cmsg_level
== SOL_SOCKET
&&
2445 cmsg
->cmsg_type
== SCM_CREDENTIALS
&&
2446 cmsg
->cmsg_len
== CMSG_LEN(sizeof(struct ucred
))) {
2449 ucred
= (struct ucred
*) CMSG_DATA(cmsg
);
2456 r
= fdset_new_array(&fds
, fd_array
, n_fds
);
2458 close_many(fd_array
, n_fds
);
2464 if (!ucred
|| !pid_is_valid(ucred
->pid
)) {
2465 log_warning("Received notify message without valid credentials. Ignoring.");
2469 if ((size_t) n
>= sizeof(buf
) || (msghdr
.msg_flags
& MSG_TRUNC
)) {
2470 log_warning("Received notify message exceeded maximum size. Ignoring.");
2474 /* As extra safety check, let's make sure the string we get doesn't contain embedded NUL bytes. We permit one
2475 * trailing NUL byte in the message, but don't expect it. */
2476 if (n
> 1 && memchr(buf
, 0, n
-1)) {
2477 log_warning("Received notify message with embedded NUL bytes. Ignoring.");
2481 /* Make sure it's NUL-terminated, then parse it to obtain the tags list */
2483 tags
= strv_split_newlines(buf
);
2489 /* possibly a barrier fd, let's see */
2490 if (manager_process_barrier_fd(tags
, fds
))
2493 /* Increase the generation counter used for filtering out duplicate unit invocations. */
2496 /* Notify every unit that might be interested, which might be multiple. */
2497 u1
= manager_get_unit_by_pid_cgroup(m
, ucred
->pid
);
2498 u2
= hashmap_get(m
->watch_pids
, PID_TO_PTR(ucred
->pid
));
2499 array
= hashmap_get(m
->watch_pids
, PID_TO_PTR(-ucred
->pid
));
2506 array_copy
= newdup(Unit
*, array
, k
+1);
2510 /* And now invoke the per-unit callbacks. Note that manager_invoke_notify_message() will handle duplicate units
2511 * make sure we only invoke each unit's handler once. */
2513 manager_invoke_notify_message(m
, u1
, ucred
, tags
, fds
);
2517 manager_invoke_notify_message(m
, u2
, ucred
, tags
, fds
);
2521 for (size_t i
= 0; array_copy
[i
]; i
++) {
2522 manager_invoke_notify_message(m
, array_copy
[i
], ucred
, tags
, fds
);
2527 log_warning("Cannot find unit for notify message of PID "PID_FMT
", ignoring.", ucred
->pid
);
2529 if (fdset_size(fds
) > 0)
2530 log_warning("Got extra auxiliary fds with notification message, closing them.");
2535 static void manager_invoke_sigchld_event(
2538 const siginfo_t
*si
) {
2544 /* Already invoked the handler of this unit in this iteration? Then don't process this again */
2545 if (u
->sigchldgen
== m
->sigchldgen
)
2547 u
->sigchldgen
= m
->sigchldgen
;
2549 log_unit_debug(u
, "Child "PID_FMT
" belongs to %s.", si
->si_pid
, u
->id
);
2550 unit_unwatch_pid(u
, si
->si_pid
);
2552 if (UNIT_VTABLE(u
)->sigchld_event
)
2553 UNIT_VTABLE(u
)->sigchld_event(u
, si
->si_pid
, si
->si_code
, si
->si_status
);
2556 static int manager_dispatch_sigchld(sd_event_source
*source
, void *userdata
) {
2557 Manager
*m
= userdata
;
2564 /* First we call waitid() for a PID and do not reap the zombie. That way we can still access /proc/$PID for it
2565 * while it is a zombie. */
2567 if (waitid(P_ALL
, 0, &si
, WEXITED
|WNOHANG
|WNOWAIT
) < 0) {
2569 if (errno
!= ECHILD
)
2570 log_error_errno(errno
, "Failed to peek for child with waitid(), ignoring: %m");
2578 if (IN_SET(si
.si_code
, CLD_EXITED
, CLD_KILLED
, CLD_DUMPED
)) {
2579 _cleanup_free_ Unit
**array_copy
= NULL
;
2580 _cleanup_free_
char *name
= NULL
;
2581 Unit
*u1
, *u2
, **array
;
2583 (void) get_process_comm(si
.si_pid
, &name
);
2585 log_debug("Child "PID_FMT
" (%s) died (code=%s, status=%i/%s)",
2586 si
.si_pid
, strna(name
),
2587 sigchld_code_to_string(si
.si_code
),
2589 strna(si
.si_code
== CLD_EXITED
2590 ? exit_status_to_string(si
.si_status
, EXIT_STATUS_FULL
)
2591 : signal_to_string(si
.si_status
)));
2593 /* Increase the generation counter used for filtering out duplicate unit invocations */
2596 /* And now figure out the unit this belongs to, it might be multiple... */
2597 u1
= manager_get_unit_by_pid_cgroup(m
, si
.si_pid
);
2598 u2
= hashmap_get(m
->watch_pids
, PID_TO_PTR(si
.si_pid
));
2599 array
= hashmap_get(m
->watch_pids
, PID_TO_PTR(-si
.si_pid
));
2603 /* Count how many entries the array has */
2607 /* Make a copy of the array so that we don't trip up on the array changing beneath us */
2608 array_copy
= newdup(Unit
*, array
, n
+1);
2613 /* Finally, execute them all. Note that u1, u2 and the array might contain duplicates, but
2614 * that's fine, manager_invoke_sigchld_event() will ensure we only invoke the handlers once for
2615 * each iteration. */
2617 /* We check for oom condition, in case we got SIGCHLD before the oom notification.
2618 * We only do this for the cgroup the PID belonged to. */
2619 (void) unit_check_oom(u1
);
2621 /* This only logs for now. In the future when the interface for kills/notifications
2622 * is more stable we can extend service results table similar to how kernel oom kills
2624 (void) unit_check_oomd_kill(u1
);
2626 manager_invoke_sigchld_event(m
, u1
, &si
);
2629 manager_invoke_sigchld_event(m
, u2
, &si
);
2631 for (size_t i
= 0; array_copy
[i
]; i
++)
2632 manager_invoke_sigchld_event(m
, array_copy
[i
], &si
);
2635 /* And now, we actually reap the zombie. */
2636 if (waitid(P_PID
, si
.si_pid
, &si
, WEXITED
) < 0) {
2637 log_error_errno(errno
, "Failed to dequeue child, ignoring: %m");
2644 /* All children processed for now, turn off event source */
2646 r
= sd_event_source_set_enabled(m
->sigchld_event_source
, SD_EVENT_OFF
);
2648 return log_error_errno(r
, "Failed to disable SIGCHLD event source: %m");
2653 static void manager_start_special(Manager
*m
, const char *name
, JobMode mode
) {
2656 if (manager_add_job_by_name_and_warn(m
, JOB_START
, name
, mode
, NULL
, &job
) < 0)
2659 const char *s
= unit_status_string(job
->unit
, NULL
);
2661 log_info("Activating special unit %s...", s
);
2664 "STATUS=Activating special unit %s...", s
);
2665 m
->status_ready
= false;
2668 static void manager_handle_ctrl_alt_del(Manager
*m
) {
2669 /* If the user presses C-A-D more than
2670 * 7 times within 2s, we reboot/shutdown immediately,
2671 * unless it was disabled in system.conf */
2673 if (ratelimit_below(&m
->ctrl_alt_del_ratelimit
) || m
->cad_burst_action
== EMERGENCY_ACTION_NONE
)
2674 manager_start_special(m
, SPECIAL_CTRL_ALT_DEL_TARGET
, JOB_REPLACE_IRREVERSIBLY
);
2676 emergency_action(m
, m
->cad_burst_action
, EMERGENCY_ACTION_WARN
, NULL
, -1,
2677 "Ctrl-Alt-Del was pressed more than 7 times within 2s");
2680 static int manager_dispatch_signal_fd(sd_event_source
*source
, int fd
, uint32_t revents
, void *userdata
) {
2681 Manager
*m
= userdata
;
2683 struct signalfd_siginfo sfsi
;
2687 assert(m
->signal_fd
== fd
);
2689 if (revents
!= EPOLLIN
) {
2690 log_warning("Got unexpected events from signal file descriptor.");
2694 n
= read(m
->signal_fd
, &sfsi
, sizeof(sfsi
));
2695 if (n
!= sizeof(sfsi
)) {
2697 log_warning("Truncated read from signal fd (%zu bytes), ignoring!", n
);
2701 if (IN_SET(errno
, EINTR
, EAGAIN
))
2704 /* We return an error here, which will kill this handler,
2705 * to avoid a busy loop on read error. */
2706 return log_error_errno(errno
, "Reading from signal fd failed: %m");
2709 log_received_signal(sfsi
.ssi_signo
== SIGCHLD
||
2710 (sfsi
.ssi_signo
== SIGTERM
&& MANAGER_IS_USER(m
))
2711 ? LOG_DEBUG
: LOG_INFO
,
2714 switch (sfsi
.ssi_signo
) {
2717 r
= sd_event_source_set_enabled(m
->sigchld_event_source
, SD_EVENT_ON
);
2719 log_warning_errno(r
, "Failed to enable SIGCHLD event source, ignoring: %m");
2724 if (MANAGER_IS_SYSTEM(m
)) {
2725 /* This is for compatibility with the original sysvinit */
2726 if (verify_run_space_and_log("Refusing to reexecute") < 0)
2729 m
->objective
= MANAGER_REEXECUTE
;
2735 if (MANAGER_IS_SYSTEM(m
))
2736 manager_handle_ctrl_alt_del(m
);
2738 manager_start_special(m
, SPECIAL_EXIT_TARGET
, JOB_REPLACE_IRREVERSIBLY
);
2742 /* This is a nop on non-init */
2743 if (MANAGER_IS_SYSTEM(m
))
2744 manager_start_special(m
, SPECIAL_KBREQUEST_TARGET
, JOB_REPLACE
);
2749 /* This is a nop on non-init */
2750 if (MANAGER_IS_SYSTEM(m
))
2751 manager_start_special(m
, SPECIAL_SIGPWR_TARGET
, JOB_REPLACE
);
2756 if (manager_dbus_is_running(m
, false)) {
2757 log_info("Trying to reconnect to bus...");
2759 (void) bus_init_api(m
);
2761 if (MANAGER_IS_SYSTEM(m
))
2762 (void) bus_init_system(m
);
2764 manager_start_special(m
, SPECIAL_DBUS_SERVICE
, JOB_REPLACE
);
2769 _cleanup_free_
char *dump
= NULL
;
2771 r
= manager_get_dump_string(m
, &dump
);
2773 log_warning_errno(errno
, "Failed to acquire manager dump: %m");
2777 log_dump(LOG_INFO
, dump
);
2782 if (verify_run_space_and_log("Refusing to reload") < 0)
2785 m
->objective
= MANAGER_RELOAD
;
2790 /* Starting SIGRTMIN+0 */
2791 static const struct {
2794 } target_table
[] = {
2795 [0] = { SPECIAL_DEFAULT_TARGET
, JOB_ISOLATE
},
2796 [1] = { SPECIAL_RESCUE_TARGET
, JOB_ISOLATE
},
2797 [2] = { SPECIAL_EMERGENCY_TARGET
, JOB_ISOLATE
},
2798 [3] = { SPECIAL_HALT_TARGET
, JOB_REPLACE_IRREVERSIBLY
},
2799 [4] = { SPECIAL_POWEROFF_TARGET
, JOB_REPLACE_IRREVERSIBLY
},
2800 [5] = { SPECIAL_REBOOT_TARGET
, JOB_REPLACE_IRREVERSIBLY
},
2801 [6] = { SPECIAL_KEXEC_TARGET
, JOB_REPLACE_IRREVERSIBLY
},
2804 /* Starting SIGRTMIN+13, so that target halt and system halt are 10 apart */
2805 static const ManagerObjective objective_table
[] = {
2807 [1] = MANAGER_POWEROFF
,
2808 [2] = MANAGER_REBOOT
,
2809 [3] = MANAGER_KEXEC
,
2812 if ((int) sfsi
.ssi_signo
>= SIGRTMIN
+0 &&
2813 (int) sfsi
.ssi_signo
< SIGRTMIN
+(int) ELEMENTSOF(target_table
)) {
2814 int idx
= (int) sfsi
.ssi_signo
- SIGRTMIN
;
2815 manager_start_special(m
, target_table
[idx
].target
, target_table
[idx
].mode
);
2819 if ((int) sfsi
.ssi_signo
>= SIGRTMIN
+13 &&
2820 (int) sfsi
.ssi_signo
< SIGRTMIN
+13+(int) ELEMENTSOF(objective_table
)) {
2821 m
->objective
= objective_table
[sfsi
.ssi_signo
- SIGRTMIN
- 13];
2825 switch (sfsi
.ssi_signo
- SIGRTMIN
) {
2828 manager_override_show_status(m
, SHOW_STATUS_YES
, "signal");
2832 manager_override_show_status(m
, SHOW_STATUS_NO
, "signal");
2836 manager_override_log_level(m
, LOG_DEBUG
);
2840 manager_restore_original_log_level(m
);
2844 if (MANAGER_IS_USER(m
)) {
2845 m
->objective
= MANAGER_EXIT
;
2849 /* This is a nop on init */
2853 m
->objective
= MANAGER_REEXECUTE
;
2857 case 29: /* compatibility: used to be mapped to LOG_TARGET_SYSLOG_OR_KMSG */
2858 manager_restore_original_log_target(m
);
2862 manager_override_log_target(m
, LOG_TARGET_CONSOLE
);
2866 manager_override_log_target(m
, LOG_TARGET_KMSG
);
2870 log_warning("Got unhandled signal <%s>.", signal_to_string(sfsi
.ssi_signo
));
2877 static int manager_dispatch_time_change_fd(sd_event_source
*source
, int fd
, uint32_t revents
, void *userdata
) {
2878 Manager
*m
= userdata
;
2882 assert(m
->time_change_fd
== fd
);
2884 log_struct(LOG_DEBUG
,
2885 "MESSAGE_ID=" SD_MESSAGE_TIME_CHANGE_STR
,
2886 LOG_MESSAGE("Time has been changed"));
2888 /* Restart the watch */
2889 (void) manager_setup_time_change(m
);
2891 HASHMAP_FOREACH(u
, m
->units
)
2892 if (UNIT_VTABLE(u
)->time_change
)
2893 UNIT_VTABLE(u
)->time_change(u
);
2898 static int manager_dispatch_timezone_change(
2899 sd_event_source
*source
,
2900 const struct inotify_event
*e
,
2903 Manager
*m
= userdata
;
2909 log_debug("inotify event for /etc/localtime");
2911 changed
= manager_read_timezone_stat(m
);
2915 /* Something changed, restart the watch, to ensure we watch the new /etc/localtime if it changed */
2916 (void) manager_setup_timezone_change(m
);
2918 /* Read the new timezone */
2921 log_debug("Timezone has been changed (now: %s).", tzname
[daylight
]);
2923 HASHMAP_FOREACH(u
, m
->units
)
2924 if (UNIT_VTABLE(u
)->timezone_change
)
2925 UNIT_VTABLE(u
)->timezone_change(u
);
2930 static int manager_dispatch_idle_pipe_fd(sd_event_source
*source
, int fd
, uint32_t revents
, void *userdata
) {
2931 Manager
*m
= userdata
;
2934 assert(m
->idle_pipe
[2] == fd
);
2936 /* There's at least one Type=idle child that just gave up on us waiting for the boot process to complete. Let's
2937 * now turn off any further console output if there's at least one service that needs console access, so that
2938 * from now on our own output should not spill into that service's output anymore. After all, we support
2939 * Type=idle only to beautify console output and it generally is set on services that want to own the console
2940 * exclusively without our interference. */
2941 m
->no_console_output
= m
->n_on_console
> 0;
2943 /* Acknowledge the child's request, and let all all other children know too that they shouldn't wait any longer
2944 * by closing the pipes towards them, which is what they are waiting for. */
2945 manager_close_idle_pipe(m
);
2950 static int manager_dispatch_jobs_in_progress(sd_event_source
*source
, usec_t usec
, void *userdata
) {
2951 Manager
*m
= userdata
;
2957 manager_print_jobs_in_progress(m
);
2959 r
= sd_event_source_set_time_relative(source
, JOBS_IN_PROGRESS_PERIOD_USEC
);
2963 return sd_event_source_set_enabled(source
, SD_EVENT_ONESHOT
);
2966 int manager_loop(Manager
*m
) {
2967 RateLimit rl
= { .interval
= 1*USEC_PER_SEC
, .burst
= 50000 };
2971 assert(m
->objective
== MANAGER_OK
); /* Ensure manager_startup() has been called */
2973 manager_check_finished(m
);
2975 /* There might still be some zombies hanging around from before we were exec()'ed. Let's reap them. */
2976 r
= sd_event_source_set_enabled(m
->sigchld_event_source
, SD_EVENT_ON
);
2978 return log_error_errno(r
, "Failed to enable SIGCHLD event source: %m");
2980 while (m
->objective
== MANAGER_OK
) {
2981 usec_t wait_usec
, watchdog_usec
;
2983 watchdog_usec
= manager_get_watchdog(m
, WATCHDOG_RUNTIME
);
2984 if (m
->runtime_watchdog_running
)
2985 (void) watchdog_ping();
2986 else if (timestamp_is_set(watchdog_usec
))
2987 manager_retry_runtime_watchdog(m
);
2989 if (!ratelimit_below(&rl
)) {
2990 /* Yay, something is going seriously wrong, pause a little */
2991 log_warning("Looping too fast. Throttling execution a little.");
2995 if (manager_dispatch_load_queue(m
) > 0)
2998 if (manager_dispatch_gc_job_queue(m
) > 0)
3001 if (manager_dispatch_gc_unit_queue(m
) > 0)
3004 if (manager_dispatch_cleanup_queue(m
) > 0)
3007 if (manager_dispatch_cgroup_realize_queue(m
) > 0)
3010 if (manager_dispatch_start_when_upheld_queue(m
) > 0)
3013 if (manager_dispatch_stop_when_bound_queue(m
) > 0)
3016 if (manager_dispatch_stop_when_unneeded_queue(m
) > 0)
3019 if (manager_dispatch_dbus_queue(m
) > 0)
3022 /* Sleep for watchdog runtime wait time */
3023 if (timestamp_is_set(watchdog_usec
))
3024 wait_usec
= watchdog_runtime_wait();
3026 wait_usec
= USEC_INFINITY
;
3028 r
= sd_event_run(m
->event
, wait_usec
);
3030 return log_error_errno(r
, "Failed to run event loop: %m");
3033 return m
->objective
;
3036 int manager_load_unit_from_dbus_path(Manager
*m
, const char *s
, sd_bus_error
*e
, Unit
**_u
) {
3037 _cleanup_free_
char *n
= NULL
;
3038 sd_id128_t invocation_id
;
3046 r
= unit_name_from_dbus_path(s
, &n
);
3050 /* Permit addressing units by invocation ID: if the passed bus path is suffixed by a 128bit ID then we use it
3051 * as invocation ID. */
3052 r
= sd_id128_from_string(n
, &invocation_id
);
3054 u
= hashmap_get(m
->units_by_invocation_id
, &invocation_id
);
3060 return sd_bus_error_setf(e
, BUS_ERROR_NO_UNIT_FOR_INVOCATION_ID
,
3061 "No unit with the specified invocation ID " SD_ID128_FORMAT_STR
" known.",
3062 SD_ID128_FORMAT_VAL(invocation_id
));
3065 /* If this didn't work, we check if this is a unit name */
3066 if (!unit_name_is_valid(n
, UNIT_NAME_PLAIN
|UNIT_NAME_INSTANCE
)) {
3067 _cleanup_free_
char *nn
= NULL
;
3070 return sd_bus_error_setf(e
, SD_BUS_ERROR_INVALID_ARGS
,
3071 "Unit name %s is neither a valid invocation ID nor unit name.", strnull(nn
));
3074 r
= manager_load_unit(m
, n
, NULL
, e
, &u
);
3082 int manager_get_job_from_dbus_path(Manager
*m
, const char *s
, Job
**_j
) {
3092 p
= startswith(s
, "/org/freedesktop/systemd1/job/");
3096 r
= safe_atou(p
, &id
);
3100 j
= manager_get_job(m
, id
);
3109 void manager_send_unit_audit(Manager
*m
, Unit
*u
, int type
, bool success
) {
3112 _cleanup_free_
char *p
= NULL
;
3116 if (!MANAGER_IS_SYSTEM(m
))
3119 audit_fd
= get_audit_fd();
3123 /* Don't generate audit events if the service was already
3124 * started and we're just deserializing */
3125 if (MANAGER_IS_RELOADING(m
))
3128 if (u
->type
!= UNIT_SERVICE
)
3131 r
= unit_name_to_prefix_and_instance(u
->id
, &p
);
3133 log_error_errno(r
, "Failed to extract prefix and instance of unit name: %m");
3137 msg
= strjoina("unit=", p
);
3138 if (audit_log_user_comm_message(audit_fd
, type
, msg
, "systemd", NULL
, NULL
, NULL
, success
) < 0) {
3140 /* We aren't allowed to send audit messages?
3141 * Then let's not retry again. */
3144 log_warning_errno(errno
, "Failed to send audit message: %m");
3150 void manager_send_unit_plymouth(Manager
*m
, Unit
*u
) {
3151 static const union sockaddr_union sa
= PLYMOUTH_SOCKET
;
3152 _cleanup_free_
char *message
= NULL
;
3153 _cleanup_close_
int fd
= -1;
3156 /* Don't generate plymouth events if the service was already
3157 * started and we're just deserializing */
3158 if (MANAGER_IS_RELOADING(m
))
3161 if (!MANAGER_IS_SYSTEM(m
))
3164 if (detect_container() > 0)
3167 if (!IN_SET(u
->type
, UNIT_SERVICE
, UNIT_MOUNT
, UNIT_SWAP
))
3170 /* We set SOCK_NONBLOCK here so that we rather drop the
3171 * message then wait for plymouth */
3172 fd
= socket(AF_UNIX
, SOCK_STREAM
|SOCK_CLOEXEC
|SOCK_NONBLOCK
, 0);
3174 log_error_errno(errno
, "socket() failed: %m");
3178 if (connect(fd
, &sa
.sa
, SOCKADDR_UN_LEN(sa
.un
)) < 0) {
3179 if (!IN_SET(errno
, EAGAIN
, ENOENT
) && !ERRNO_IS_DISCONNECT(errno
))
3180 log_error_errno(errno
, "connect() failed: %m");
3184 if (asprintf(&message
, "U\002%c%s%n", (int) (strlen(u
->id
) + 1), u
->id
, &n
) < 0)
3185 return (void) log_oom();
3188 if (write(fd
, message
, n
+ 1) != n
+ 1)
3189 if (!IN_SET(errno
, EAGAIN
, ENOENT
) && !ERRNO_IS_DISCONNECT(errno
))
3190 log_error_errno(errno
, "Failed to write Plymouth message: %m");
3193 usec_t
manager_get_watchdog(Manager
*m
, WatchdogType t
) {
3196 if (MANAGER_IS_USER(m
))
3197 return USEC_INFINITY
;
3199 if (timestamp_is_set(m
->watchdog_overridden
[t
]))
3200 return m
->watchdog_overridden
[t
];
3202 return m
->watchdog
[t
];
3205 void manager_set_watchdog(Manager
*m
, WatchdogType t
, usec_t timeout
) {
3210 if (MANAGER_IS_USER(m
))
3213 if (m
->watchdog
[t
] == timeout
)
3216 if (t
== WATCHDOG_RUNTIME
)
3217 if (!timestamp_is_set(m
->watchdog_overridden
[WATCHDOG_RUNTIME
])) {
3218 if (timestamp_is_set(timeout
)) {
3219 r
= watchdog_set_timeout(&timeout
);
3222 m
->runtime_watchdog_running
= true;
3224 watchdog_close(true);
3225 m
->runtime_watchdog_running
= false;
3229 m
->watchdog
[t
] = timeout
;
3232 int manager_override_watchdog(Manager
*m
, WatchdogType t
, usec_t timeout
) {
3237 if (MANAGER_IS_USER(m
))
3240 if (m
->watchdog_overridden
[t
] == timeout
)
3243 if (t
== WATCHDOG_RUNTIME
) {
3246 p
= timestamp_is_set(timeout
) ? &timeout
: &m
->watchdog
[t
];
3247 if (timestamp_is_set(*p
)) {
3248 r
= watchdog_set_timeout(p
);
3251 m
->runtime_watchdog_running
= true;
3253 watchdog_close(true);
3254 m
->runtime_watchdog_running
= false;
3258 m
->watchdog_overridden
[t
] = timeout
;
3263 void manager_retry_runtime_watchdog(Manager
*m
) {
3268 if (timestamp_is_set(m
->watchdog_overridden
[WATCHDOG_RUNTIME
]))
3269 r
= watchdog_set_timeout(&m
->watchdog_overridden
[WATCHDOG_RUNTIME
]);
3271 r
= watchdog_set_timeout(&m
->watchdog
[WATCHDOG_RUNTIME
]);
3274 m
->runtime_watchdog_running
= true;
3277 int manager_reload(Manager
*m
) {
3278 _cleanup_(manager_reloading_stopp
) Manager
*reloading
= NULL
;
3279 _cleanup_fdset_free_ FDSet
*fds
= NULL
;
3280 _cleanup_fclose_
FILE *f
= NULL
;
3285 r
= manager_open_serialization(m
, &f
);
3287 return log_error_errno(r
, "Failed to create serialization file: %m");
3293 /* We are officially in reload mode from here on. */
3294 reloading
= manager_reloading_start(m
);
3296 r
= manager_serialize(m
, f
, fds
, false);
3300 if (fseeko(f
, 0, SEEK_SET
) < 0)
3301 return log_error_errno(errno
, "Failed to seek to beginning of serialization: %m");
3303 /* 💀 This is the point of no return, from here on there is no way back. 💀 */
3306 bus_manager_send_reloading(m
, true);
3308 /* Start by flushing out all jobs and units, all generated units, all runtime environments, all dynamic users
3309 * and everything else that is worth flushing out. We'll get it all back from the serialization — if we need
3312 manager_clear_jobs_and_units(m
);
3313 lookup_paths_flush_generator(&m
->lookup_paths
);
3314 lookup_paths_free(&m
->lookup_paths
);
3315 exec_runtime_vacuum(m
);
3316 dynamic_user_vacuum(m
, false);
3317 m
->uid_refs
= hashmap_free(m
->uid_refs
);
3318 m
->gid_refs
= hashmap_free(m
->gid_refs
);
3320 r
= lookup_paths_init(&m
->lookup_paths
, m
->unit_file_scope
, 0, NULL
);
3322 log_warning_errno(r
, "Failed to initialize path lookup table, ignoring: %m");
3324 (void) manager_run_environment_generators(m
);
3325 (void) manager_run_generators(m
);
3327 lookup_paths_log(&m
->lookup_paths
);
3329 /* We flushed out generated files, for which we don't watch mtime, so we should flush the old map. */
3330 manager_free_unit_name_maps(m
);
3332 /* First, enumerate what we can from kernel and suchlike */
3333 manager_enumerate_perpetual(m
);
3334 manager_enumerate(m
);
3336 /* Second, deserialize our stored data */
3337 r
= manager_deserialize(m
, f
, fds
);
3339 log_warning_errno(r
, "Deserialization failed, proceeding anyway: %m");
3341 /* We don't need the serialization anymore */
3344 /* Re-register notify_fd as event source, and set up other sockets/communication channels we might need */
3345 (void) manager_setup_notify(m
);
3346 (void) manager_setup_cgroups_agent(m
);
3347 (void) manager_setup_user_lookup_fd(m
);
3349 /* Third, fire things up! */
3350 manager_coldplug(m
);
3352 /* Clean up runtime objects no longer referenced */
3355 /* Clean up deserialized tracked clients */
3356 m
->deserialized_subscribed
= strv_free(m
->deserialized_subscribed
);
3358 /* Consider the reload process complete now. */
3359 assert(m
->n_reloading
> 0);
3362 /* On manager reloading, device tag data should exists, thus, we should honor the results of device
3363 * enumeration. The flag should be always set correctly by the serialized data, but it may fail. So,
3364 * let's always set the flag here for safety. */
3365 m
->honor_device_enumeration
= true;
3369 m
->send_reloading_done
= true;
3373 void manager_reset_failed(Manager
*m
) {
3378 HASHMAP_FOREACH(u
, m
->units
)
3379 unit_reset_failed(u
);
3382 bool manager_unit_inactive_or_pending(Manager
*m
, const char *name
) {
3388 /* Returns true if the unit is inactive or going down */
3389 u
= manager_get_unit(m
, name
);
3393 return unit_inactive_or_pending(u
);
3396 static void log_taint_string(Manager
*m
) {
3397 _cleanup_free_
char *taint
= NULL
;
3401 if (MANAGER_IS_USER(m
) || m
->taint_logged
)
3404 m
->taint_logged
= true; /* only check for taint once */
3406 taint
= manager_taint_string(m
);
3410 log_struct(LOG_NOTICE
,
3411 LOG_MESSAGE("System is tainted: %s", taint
),
3413 "MESSAGE_ID=" SD_MESSAGE_TAINTED_STR
);
3416 static void manager_notify_finished(Manager
*m
) {
3417 usec_t firmware_usec
, loader_usec
, kernel_usec
, initrd_usec
, userspace_usec
, total_usec
;
3419 if (MANAGER_IS_TEST_RUN(m
))
3422 if (MANAGER_IS_SYSTEM(m
) && detect_container() <= 0) {
3423 char buf
[FORMAT_TIMESPAN_MAX
+ STRLEN(" (firmware) + ") + FORMAT_TIMESPAN_MAX
+ STRLEN(" (loader) + ")]
3426 size_t size
= sizeof buf
;
3428 /* Note that MANAGER_TIMESTAMP_KERNEL's monotonic value is always at 0, and
3429 * MANAGER_TIMESTAMP_FIRMWARE's and MANAGER_TIMESTAMP_LOADER's monotonic value should be considered
3430 * negative values. */
3432 firmware_usec
= m
->timestamps
[MANAGER_TIMESTAMP_FIRMWARE
].monotonic
- m
->timestamps
[MANAGER_TIMESTAMP_LOADER
].monotonic
;
3433 loader_usec
= m
->timestamps
[MANAGER_TIMESTAMP_LOADER
].monotonic
- m
->timestamps
[MANAGER_TIMESTAMP_KERNEL
].monotonic
;
3434 userspace_usec
= m
->timestamps
[MANAGER_TIMESTAMP_FINISH
].monotonic
- m
->timestamps
[MANAGER_TIMESTAMP_USERSPACE
].monotonic
;
3435 total_usec
= m
->timestamps
[MANAGER_TIMESTAMP_FIRMWARE
].monotonic
+ m
->timestamps
[MANAGER_TIMESTAMP_FINISH
].monotonic
;
3437 if (firmware_usec
> 0)
3438 size
= strpcpyf(&p
, size
, "%s (firmware) + ", FORMAT_TIMESPAN(firmware_usec
, USEC_PER_MSEC
));
3439 if (loader_usec
> 0)
3440 size
= strpcpyf(&p
, size
, "%s (loader) + ", FORMAT_TIMESPAN(loader_usec
, USEC_PER_MSEC
));
3442 if (dual_timestamp_is_set(&m
->timestamps
[MANAGER_TIMESTAMP_INITRD
])) {
3444 /* The initrd case on bare-metal */
3445 kernel_usec
= m
->timestamps
[MANAGER_TIMESTAMP_INITRD
].monotonic
- m
->timestamps
[MANAGER_TIMESTAMP_KERNEL
].monotonic
;
3446 initrd_usec
= m
->timestamps
[MANAGER_TIMESTAMP_USERSPACE
].monotonic
- m
->timestamps
[MANAGER_TIMESTAMP_INITRD
].monotonic
;
3448 log_struct(LOG_INFO
,
3449 "MESSAGE_ID=" SD_MESSAGE_STARTUP_FINISHED_STR
,
3450 "KERNEL_USEC="USEC_FMT
, kernel_usec
,
3451 "INITRD_USEC="USEC_FMT
, initrd_usec
,
3452 "USERSPACE_USEC="USEC_FMT
, userspace_usec
,
3453 LOG_MESSAGE("Startup finished in %s%s (kernel) + %s (initrd) + %s (userspace) = %s.",
3455 FORMAT_TIMESPAN(kernel_usec
, USEC_PER_MSEC
),
3456 FORMAT_TIMESPAN(initrd_usec
, USEC_PER_MSEC
),
3457 FORMAT_TIMESPAN(userspace_usec
, USEC_PER_MSEC
),
3458 FORMAT_TIMESPAN(total_usec
, USEC_PER_MSEC
)));
3460 /* The initrd-less case on bare-metal */
3462 kernel_usec
= m
->timestamps
[MANAGER_TIMESTAMP_USERSPACE
].monotonic
- m
->timestamps
[MANAGER_TIMESTAMP_KERNEL
].monotonic
;
3465 log_struct(LOG_INFO
,
3466 "MESSAGE_ID=" SD_MESSAGE_STARTUP_FINISHED_STR
,
3467 "KERNEL_USEC="USEC_FMT
, kernel_usec
,
3468 "USERSPACE_USEC="USEC_FMT
, userspace_usec
,
3469 LOG_MESSAGE("Startup finished in %s%s (kernel) + %s (userspace) = %s.",
3471 FORMAT_TIMESPAN(kernel_usec
, USEC_PER_MSEC
),
3472 FORMAT_TIMESPAN(userspace_usec
, USEC_PER_MSEC
),
3473 FORMAT_TIMESPAN(total_usec
, USEC_PER_MSEC
)));
3476 /* The container and --user case */
3477 firmware_usec
= loader_usec
= initrd_usec
= kernel_usec
= 0;
3478 total_usec
= userspace_usec
= m
->timestamps
[MANAGER_TIMESTAMP_FINISH
].monotonic
- m
->timestamps
[MANAGER_TIMESTAMP_USERSPACE
].monotonic
;
3480 log_struct(LOG_INFO
,
3481 "MESSAGE_ID=" SD_MESSAGE_USER_STARTUP_FINISHED_STR
,
3482 "USERSPACE_USEC="USEC_FMT
, userspace_usec
,
3483 LOG_MESSAGE("Startup finished in %s.",
3484 FORMAT_TIMESPAN(total_usec
, USEC_PER_MSEC
)));
3487 bus_manager_send_finished(m
, firmware_usec
, loader_usec
, kernel_usec
, initrd_usec
, userspace_usec
, total_usec
);
3489 log_taint_string(m
);
3492 static void user_manager_send_ready(Manager
*m
) {
3495 /* We send READY=1 on reaching basic.target only when running in --user mode. */
3496 if (!MANAGER_IS_USER(m
) || m
->ready_sent
)
3501 "STATUS=Reached " SPECIAL_BASIC_TARGET
".");
3502 m
->ready_sent
= true;
3503 m
->status_ready
= false;
3506 static void manager_send_ready(Manager
*m
) {
3507 if (m
->ready_sent
&& m
->status_ready
)
3508 /* Skip the notification if nothing changed. */
3513 m
->ready_sent
? "READY=1\n" : "");
3514 m
->ready_sent
= m
->status_ready
= true;
3517 static void manager_check_basic_target(Manager
*m
) {
3522 /* Small shortcut */
3523 if (m
->ready_sent
&& m
->taint_logged
)
3526 u
= manager_get_unit(m
, SPECIAL_BASIC_TARGET
);
3527 if (!u
|| !UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u
)))
3530 /* For user managers, send out READY=1 as soon as we reach basic.target */
3531 user_manager_send_ready(m
);
3533 /* Log the taint string as soon as we reach basic.target */
3534 log_taint_string(m
);
3537 void manager_check_finished(Manager
*m
) {
3540 if (MANAGER_IS_RELOADING(m
))
3543 /* Verify that we have entered the event loop already, and not left it again. */
3544 if (!MANAGER_IS_RUNNING(m
))
3547 manager_check_basic_target(m
);
3549 if (hashmap_size(m
->jobs
) > 0) {
3550 if (m
->jobs_in_progress_event_source
)
3551 /* Ignore any failure, this is only for feedback */
3552 (void) sd_event_source_set_time(m
->jobs_in_progress_event_source
,
3553 manager_watch_jobs_next_time(m
));
3557 /* The jobs hashmap tends to grow a lot during boot, and then it's not reused until shutdown. Let's
3558 kill the hashmap if it is relatively large. */
3559 if (hashmap_buckets(m
->jobs
) > hashmap_size(m
->units
) / 10)
3560 m
->jobs
= hashmap_free(m
->jobs
);
3562 manager_send_ready(m
);
3564 if (MANAGER_IS_FINISHED(m
))
3567 manager_flip_auto_status(m
, false, "boot finished");
3569 /* Notify Type=idle units that we are done now */
3570 manager_close_idle_pipe(m
);
3572 /* Turn off confirm spawn now */
3573 m
->confirm_spawn
= NULL
;
3575 /* No need to update ask password status when we're going non-interactive */
3576 manager_close_ask_password(m
);
3578 /* This is no longer the first boot */
3579 manager_set_first_boot(m
, false);
3581 dual_timestamp_get(m
->timestamps
+ MANAGER_TIMESTAMP_FINISH
);
3583 manager_notify_finished(m
);
3585 manager_invalidate_startup_units(m
);
3588 static bool generator_path_any(const char* const* paths
) {
3592 /* Optimize by skipping the whole process by not creating output directories
3593 * if no generators are found. */
3594 STRV_FOREACH(path
, (char**) paths
)
3595 if (access(*path
, F_OK
) == 0)
3597 else if (errno
!= ENOENT
)
3598 log_warning_errno(errno
, "Failed to open generator directory %s: %m", *path
);
3603 static int manager_run_environment_generators(Manager
*m
) {
3604 char **tmp
= NULL
; /* this is only used in the forked process, no cleanup here */
3605 _cleanup_strv_free_
char **paths
= NULL
;
3607 [STDOUT_GENERATE
] = &tmp
,
3608 [STDOUT_COLLECT
] = &tmp
,
3609 [STDOUT_CONSUME
] = &m
->transient_environment
,
3613 if (MANAGER_IS_TEST_RUN(m
) && !(m
->test_run_flags
& MANAGER_TEST_RUN_ENV_GENERATORS
))
3616 paths
= env_generator_binary_paths(MANAGER_IS_SYSTEM(m
));
3620 if (!generator_path_any((const char* const*) paths
))
3623 RUN_WITH_UMASK(0022)
3624 r
= execute_directories((const char* const*) paths
, DEFAULT_TIMEOUT_USEC
, gather_environment
,
3625 args
, NULL
, m
->transient_environment
,
3626 EXEC_DIR_PARALLEL
| EXEC_DIR_IGNORE_ERRORS
| EXEC_DIR_SET_SYSTEMD_EXEC_PID
);
3630 static int manager_run_generators(Manager
*m
) {
3631 _cleanup_strv_free_
char **paths
= NULL
;
3632 const char *argv
[5];
3637 if (MANAGER_IS_TEST_RUN(m
) && !(m
->test_run_flags
& MANAGER_TEST_RUN_GENERATORS
))
3640 paths
= generator_binary_paths(m
->unit_file_scope
);
3644 if (!generator_path_any((const char* const*) paths
))
3647 r
= lookup_paths_mkdir_generator(&m
->lookup_paths
);
3649 log_error_errno(r
, "Failed to create generator directories: %m");
3653 argv
[0] = NULL
; /* Leave this empty, execute_directory() will fill something in */
3654 argv
[1] = m
->lookup_paths
.generator
;
3655 argv
[2] = m
->lookup_paths
.generator_early
;
3656 argv
[3] = m
->lookup_paths
.generator_late
;
3659 RUN_WITH_UMASK(0022)
3660 (void) execute_directories((const char* const*) paths
, DEFAULT_TIMEOUT_USEC
, NULL
, NULL
,
3661 (char**) argv
, m
->transient_environment
,
3662 EXEC_DIR_PARALLEL
| EXEC_DIR_IGNORE_ERRORS
| EXEC_DIR_SET_SYSTEMD_EXEC_PID
);
3667 lookup_paths_trim_generator(&m
->lookup_paths
);
3671 int manager_transient_environment_add(Manager
*m
, char **plus
) {
3676 if (strv_isempty(plus
))
3679 a
= strv_env_merge(m
->transient_environment
, plus
);
3683 sanitize_environment(a
);
3685 return strv_free_and_replace(m
->transient_environment
, a
);
3688 int manager_client_environment_modify(
3693 char **a
= NULL
, **b
= NULL
, **l
;
3697 if (strv_isempty(minus
) && strv_isempty(plus
))
3700 l
= m
->client_environment
;
3702 if (!strv_isempty(minus
)) {
3703 a
= strv_env_delete(l
, 1, minus
);
3710 if (!strv_isempty(plus
)) {
3711 b
= strv_env_merge(l
, plus
);
3720 if (m
->client_environment
!= l
)
3721 strv_free(m
->client_environment
);
3728 m
->client_environment
= sanitize_environment(l
);
3732 int manager_get_effective_environment(Manager
*m
, char ***ret
) {
3738 l
= strv_env_merge(m
->transient_environment
, m
->client_environment
);
3746 int manager_set_default_rlimits(Manager
*m
, struct rlimit
**default_rlimit
) {
3749 for (unsigned i
= 0; i
< _RLIMIT_MAX
; i
++) {
3750 m
->rlimit
[i
] = mfree(m
->rlimit
[i
]);
3752 if (!default_rlimit
[i
])
3755 m
->rlimit
[i
] = newdup(struct rlimit
, default_rlimit
[i
], 1);
3763 void manager_recheck_dbus(Manager
*m
) {
3766 /* Connects to the bus if the dbus service and socket are running. If we are running in user mode this is all
3767 * it does. In system mode we'll also connect to the system bus (which will most likely just reuse the
3768 * connection of the API bus). That's because the system bus after all runs as service of the system instance,
3769 * while in the user instance we can assume it's already there. */
3771 if (MANAGER_IS_RELOADING(m
))
3772 return; /* don't check while we are reloading… */
3774 if (manager_dbus_is_running(m
, false)) {
3775 (void) bus_init_api(m
);
3777 if (MANAGER_IS_SYSTEM(m
))
3778 (void) bus_init_system(m
);
3780 (void) bus_done_api(m
);
3782 if (MANAGER_IS_SYSTEM(m
))
3783 (void) bus_done_system(m
);
3787 static bool manager_journal_is_running(Manager
*m
) {
3792 if (MANAGER_IS_TEST_RUN(m
))
3795 /* If we are the user manager we can safely assume that the journal is up */
3796 if (!MANAGER_IS_SYSTEM(m
))
3799 /* Check that the socket is not only up, but in RUNNING state */
3800 u
= manager_get_unit(m
, SPECIAL_JOURNALD_SOCKET
);
3803 if (SOCKET(u
)->state
!= SOCKET_RUNNING
)
3806 /* Similar, check if the daemon itself is fully up, too */
3807 u
= manager_get_unit(m
, SPECIAL_JOURNALD_SERVICE
);
3810 if (!IN_SET(SERVICE(u
)->state
, SERVICE_RELOAD
, SERVICE_RUNNING
))
3816 void disable_printk_ratelimit(void) {
3817 /* Disable kernel's printk ratelimit.
3819 * Logging to /dev/kmsg is most useful during early boot and shutdown, where normal logging
3820 * mechanisms are not available. The semantics of this sysctl are such that any kernel command-line
3821 * setting takes precedence. */
3824 r
= sysctl_write("kernel/printk_devkmsg", "on");
3826 log_debug_errno(r
, "Failed to set sysctl kernel.printk_devkmsg=on: %m");
3829 void manager_recheck_journal(Manager
*m
) {
3833 /* Don't bother with this unless we are in the special situation of being PID 1 */
3834 if (getpid_cached() != 1)
3837 /* Don't check this while we are reloading, things might still change */
3838 if (MANAGER_IS_RELOADING(m
))
3841 /* The journal is fully and entirely up? If so, let's permit logging to it, if that's configured. If the
3842 * journal is down, don't ever log to it, otherwise we might end up deadlocking ourselves as we might trigger
3843 * an activation ourselves we can't fulfill. */
3844 log_set_prohibit_ipc(!manager_journal_is_running(m
));
3848 static ShowStatus
manager_get_show_status(Manager
*m
) {
3851 if (MANAGER_IS_USER(m
))
3852 return _SHOW_STATUS_INVALID
;
3854 if (m
->show_status_overridden
!= _SHOW_STATUS_INVALID
)
3855 return m
->show_status_overridden
;
3857 return m
->show_status
;
3860 bool manager_get_show_status_on(Manager
*m
) {
3863 return show_status_on(manager_get_show_status(m
));
3866 static void set_show_status_marker(bool b
) {
3868 (void) touch("/run/systemd/show-status");
3870 (void) unlink("/run/systemd/show-status");
3873 void manager_set_show_status(Manager
*m
, ShowStatus mode
, const char *reason
) {
3876 assert(mode
>= 0 && mode
< _SHOW_STATUS_MAX
);
3878 if (MANAGER_IS_USER(m
))
3881 if (mode
== m
->show_status
)
3884 if (m
->show_status_overridden
== _SHOW_STATUS_INVALID
) {
3887 enabled
= show_status_on(mode
);
3888 log_debug("%s (%s) showing of status (%s).",
3889 enabled
? "Enabling" : "Disabling",
3890 strna(show_status_to_string(mode
)),
3893 set_show_status_marker(enabled
);
3896 m
->show_status
= mode
;
3899 void manager_override_show_status(Manager
*m
, ShowStatus mode
, const char *reason
) {
3901 assert(mode
< _SHOW_STATUS_MAX
);
3903 if (MANAGER_IS_USER(m
))
3906 if (mode
== m
->show_status_overridden
)
3909 m
->show_status_overridden
= mode
;
3911 if (mode
== _SHOW_STATUS_INVALID
)
3912 mode
= m
->show_status
;
3914 log_debug("%s (%s) showing of status (%s).",
3915 m
->show_status_overridden
!= _SHOW_STATUS_INVALID
? "Overriding" : "Restoring",
3916 strna(show_status_to_string(mode
)),
3919 set_show_status_marker(show_status_on(mode
));
3922 const char *manager_get_confirm_spawn(Manager
*m
) {
3923 static int last_errno
= 0;
3929 /* Here's the deal: we want to test the validity of the console but don't want
3930 * PID1 to go through the whole console process which might block. But we also
3931 * want to warn the user only once if something is wrong with the console so we
3932 * cannot do the sanity checks after spawning our children. So here we simply do
3933 * really basic tests to hopefully trap common errors.
3935 * If the console suddenly disappear at the time our children will really it
3936 * then they will simply fail to acquire it and a positive answer will be
3937 * assumed. New children will fall back to /dev/console though.
3939 * Note: TTYs are devices that can come and go any time, and frequently aren't
3940 * available yet during early boot (consider a USB rs232 dongle...). If for any
3941 * reason the configured console is not ready, we fall back to the default
3944 if (!m
->confirm_spawn
|| path_equal(m
->confirm_spawn
, "/dev/console"))
3945 return m
->confirm_spawn
;
3947 if (stat(m
->confirm_spawn
, &st
) < 0) {
3952 if (!S_ISCHR(st
.st_mode
)) {
3958 return m
->confirm_spawn
;
3961 if (last_errno
!= r
)
3962 last_errno
= log_warning_errno(r
, "Failed to open %s, using default console: %m", m
->confirm_spawn
);
3964 return "/dev/console";
3967 void manager_set_first_boot(Manager
*m
, bool b
) {
3970 if (!MANAGER_IS_SYSTEM(m
))
3973 if (m
->first_boot
!= (int) b
) {
3975 (void) touch("/run/systemd/first-boot");
3977 (void) unlink("/run/systemd/first-boot");
3983 void manager_disable_confirm_spawn(void) {
3984 (void) touch("/run/systemd/confirm_spawn_disabled");
3987 bool manager_is_confirm_spawn_disabled(Manager
*m
) {
3988 if (!m
->confirm_spawn
)
3991 return access("/run/systemd/confirm_spawn_disabled", F_OK
) >= 0;
3994 static bool manager_should_show_status(Manager
*m
, StatusType type
) {
3997 if (!MANAGER_IS_SYSTEM(m
))
4000 if (m
->no_console_output
)
4003 if (!IN_SET(manager_state(m
), MANAGER_INITIALIZING
, MANAGER_STARTING
, MANAGER_STOPPING
))
4006 /* If we cannot find out the status properly, just proceed. */
4007 if (type
!= STATUS_TYPE_EMERGENCY
&& manager_check_ask_password(m
) > 0)
4010 if (type
== STATUS_TYPE_NOTICE
&& m
->show_status
!= SHOW_STATUS_NO
)
4013 return manager_get_show_status_on(m
);
4016 void manager_status_printf(Manager
*m
, StatusType type
, const char *status
, const char *format
, ...) {
4019 /* If m is NULL, assume we're after shutdown and let the messages through. */
4021 if (m
&& !manager_should_show_status(m
, type
))
4024 /* XXX We should totally drop the check for ephemeral here
4025 * and thus effectively make 'Type=idle' pointless. */
4026 if (type
== STATUS_TYPE_EPHEMERAL
&& m
&& m
->n_on_console
> 0)
4029 va_start(ap
, format
);
4030 status_vprintf(status
, SHOW_STATUS_ELLIPSIZE
|(type
== STATUS_TYPE_EPHEMERAL
? SHOW_STATUS_EPHEMERAL
: 0), format
, ap
);
4034 Set
* manager_get_units_requiring_mounts_for(Manager
*m
, const char *path
) {
4038 if (path_equal(path
, "/"))
4041 return hashmap_get(m
->units_requiring_mounts_for
, path
);
4044 int manager_update_failed_units(Manager
*m
, Unit
*u
, bool failed
) {
4049 assert(u
->manager
== m
);
4051 size
= set_size(m
->failed_units
);
4054 r
= set_ensure_put(&m
->failed_units
, NULL
, u
);
4058 (void) set_remove(m
->failed_units
, u
);
4060 if (set_size(m
->failed_units
) != size
)
4061 bus_manager_send_change_signal(m
);
4066 ManagerState
manager_state(Manager
*m
) {
4071 /* Is the special shutdown target active or queued? If so, we are in shutdown state */
4072 u
= manager_get_unit(m
, SPECIAL_SHUTDOWN_TARGET
);
4073 if (u
&& unit_active_or_pending(u
))
4074 return MANAGER_STOPPING
;
4076 /* Did we ever finish booting? If not then we are still starting up */
4077 if (!MANAGER_IS_FINISHED(m
)) {
4079 u
= manager_get_unit(m
, SPECIAL_BASIC_TARGET
);
4080 if (!u
|| !UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u
)))
4081 return MANAGER_INITIALIZING
;
4083 return MANAGER_STARTING
;
4086 if (MANAGER_IS_SYSTEM(m
)) {
4087 /* Are the rescue or emergency targets active or queued? If so we are in maintenance state */
4088 u
= manager_get_unit(m
, SPECIAL_RESCUE_TARGET
);
4089 if (u
&& unit_active_or_pending(u
))
4090 return MANAGER_MAINTENANCE
;
4092 u
= manager_get_unit(m
, SPECIAL_EMERGENCY_TARGET
);
4093 if (u
&& unit_active_or_pending(u
))
4094 return MANAGER_MAINTENANCE
;
4097 /* Are there any failed units? If so, we are in degraded mode */
4098 if (set_size(m
->failed_units
) > 0)
4099 return MANAGER_DEGRADED
;
4101 return MANAGER_RUNNING
;
4104 static void manager_unref_uid_internal(
4108 int (*_clean_ipc
)(uid_t uid
)) {
4112 assert(uid_is_valid(uid
));
4115 /* A generic implementation, covering both manager_unref_uid() and manager_unref_gid(), under the assumption
4116 * that uid_t and gid_t are actually defined the same way, with the same validity rules.
4118 * We store a hashmap where the UID/GID is they key and the value is a 32bit reference counter, whose highest
4119 * bit is used as flag for marking UIDs/GIDs whose IPC objects to remove when the last reference to the UID/GID
4120 * is dropped. The flag is set to on, once at least one reference from a unit where RemoveIPC= is set is added
4121 * on a UID/GID. It is reset when the UID's/GID's reference counter drops to 0 again. */
4123 assert_cc(sizeof(uid_t
) == sizeof(gid_t
));
4124 assert_cc(UID_INVALID
== (uid_t
) GID_INVALID
);
4126 if (uid
== 0) /* We don't keep track of root, and will never destroy it */
4129 c
= PTR_TO_UINT32(hashmap_get(uid_refs
, UID_TO_PTR(uid
)));
4131 n
= c
& ~DESTROY_IPC_FLAG
;
4135 if (destroy_now
&& n
== 0) {
4136 hashmap_remove(uid_refs
, UID_TO_PTR(uid
));
4138 if (c
& DESTROY_IPC_FLAG
) {
4139 log_debug("%s " UID_FMT
" is no longer referenced, cleaning up its IPC.",
4140 _clean_ipc
== clean_ipc_by_uid
? "UID" : "GID",
4142 (void) _clean_ipc(uid
);
4145 c
= n
| (c
& DESTROY_IPC_FLAG
);
4146 assert_se(hashmap_update(uid_refs
, UID_TO_PTR(uid
), UINT32_TO_PTR(c
)) >= 0);
4150 void manager_unref_uid(Manager
*m
, uid_t uid
, bool destroy_now
) {
4151 manager_unref_uid_internal(m
->uid_refs
, uid
, destroy_now
, clean_ipc_by_uid
);
4154 void manager_unref_gid(Manager
*m
, gid_t gid
, bool destroy_now
) {
4155 manager_unref_uid_internal(m
->gid_refs
, (uid_t
) gid
, destroy_now
, clean_ipc_by_gid
);
4158 static int manager_ref_uid_internal(
4167 assert(uid_is_valid(uid
));
4169 /* A generic implementation, covering both manager_ref_uid() and manager_ref_gid(), under the assumption
4170 * that uid_t and gid_t are actually defined the same way, with the same validity rules. */
4172 assert_cc(sizeof(uid_t
) == sizeof(gid_t
));
4173 assert_cc(UID_INVALID
== (uid_t
) GID_INVALID
);
4175 if (uid
== 0) /* We don't keep track of root, and will never destroy it */
4178 r
= hashmap_ensure_allocated(uid_refs
, &trivial_hash_ops
);
4182 c
= PTR_TO_UINT32(hashmap_get(*uid_refs
, UID_TO_PTR(uid
)));
4184 n
= c
& ~DESTROY_IPC_FLAG
;
4187 if (n
& DESTROY_IPC_FLAG
) /* check for overflow */
4190 c
= n
| (c
& DESTROY_IPC_FLAG
) | (clean_ipc
? DESTROY_IPC_FLAG
: 0);
4192 return hashmap_replace(*uid_refs
, UID_TO_PTR(uid
), UINT32_TO_PTR(c
));
4195 int manager_ref_uid(Manager
*m
, uid_t uid
, bool clean_ipc
) {
4196 return manager_ref_uid_internal(&m
->uid_refs
, uid
, clean_ipc
);
4199 int manager_ref_gid(Manager
*m
, gid_t gid
, bool clean_ipc
) {
4200 return manager_ref_uid_internal(&m
->gid_refs
, (uid_t
) gid
, clean_ipc
);
4203 static void manager_vacuum_uid_refs_internal(
4205 int (*_clean_ipc
)(uid_t uid
)) {
4211 HASHMAP_FOREACH_KEY(p
, k
, uid_refs
) {
4215 uid
= PTR_TO_UID(k
);
4216 c
= PTR_TO_UINT32(p
);
4218 n
= c
& ~DESTROY_IPC_FLAG
;
4222 if (c
& DESTROY_IPC_FLAG
) {
4223 log_debug("Found unreferenced %s " UID_FMT
" after reload/reexec. Cleaning up.",
4224 _clean_ipc
== clean_ipc_by_uid
? "UID" : "GID",
4226 (void) _clean_ipc(uid
);
4229 assert_se(hashmap_remove(uid_refs
, k
) == p
);
4233 static void manager_vacuum_uid_refs(Manager
*m
) {
4234 manager_vacuum_uid_refs_internal(m
->uid_refs
, clean_ipc_by_uid
);
4237 static void manager_vacuum_gid_refs(Manager
*m
) {
4238 manager_vacuum_uid_refs_internal(m
->gid_refs
, clean_ipc_by_gid
);
4241 static void manager_vacuum(Manager
*m
) {
4244 /* Release any dynamic users no longer referenced */
4245 dynamic_user_vacuum(m
, true);
4247 /* Release any references to UIDs/GIDs no longer referenced, and destroy any IPC owned by them */
4248 manager_vacuum_uid_refs(m
);
4249 manager_vacuum_gid_refs(m
);
4251 /* Release any runtimes no longer referenced */
4252 exec_runtime_vacuum(m
);
4255 int manager_dispatch_user_lookup_fd(sd_event_source
*source
, int fd
, uint32_t revents
, void *userdata
) {
4259 char unit_name
[UNIT_NAME_MAX
+1];
4262 Manager
*m
= userdata
;
4270 /* Invoked whenever a child process succeeded resolving its user/group to use and sent us the resulting UID/GID
4271 * in a datagram. We parse the datagram here and pass it off to the unit, so that it can add a reference to the
4272 * UID/GID so that it can destroy the UID/GID's IPC objects when the reference counter drops to 0. */
4274 l
= recv(fd
, &buffer
, sizeof(buffer
), MSG_DONTWAIT
);
4276 if (IN_SET(errno
, EINTR
, EAGAIN
))
4279 return log_error_errno(errno
, "Failed to read from user lookup fd: %m");
4282 if ((size_t) l
<= offsetof(struct buffer
, unit_name
)) {
4283 log_warning("Received too short user lookup message, ignoring.");
4287 if ((size_t) l
> offsetof(struct buffer
, unit_name
) + UNIT_NAME_MAX
) {
4288 log_warning("Received too long user lookup message, ignoring.");
4292 if (!uid_is_valid(buffer
.uid
) && !gid_is_valid(buffer
.gid
)) {
4293 log_warning("Got user lookup message with invalid UID/GID pair, ignoring.");
4297 n
= (size_t) l
- offsetof(struct buffer
, unit_name
);
4298 if (memchr(buffer
.unit_name
, 0, n
)) {
4299 log_warning("Received lookup message with embedded NUL character, ignoring.");
4303 buffer
.unit_name
[n
] = 0;
4304 u
= manager_get_unit(m
, buffer
.unit_name
);
4306 log_debug("Got user lookup message but unit doesn't exist, ignoring.");
4310 log_unit_debug(u
, "User lookup succeeded: uid=" UID_FMT
" gid=" GID_FMT
, buffer
.uid
, buffer
.gid
);
4312 unit_notify_user_lookup(u
, buffer
.uid
, buffer
.gid
);
4316 char *manager_taint_string(Manager
*m
) {
4317 _cleanup_free_
char *destination
= NULL
, *overflowuid
= NULL
, *overflowgid
= NULL
;
4321 /* Returns a "taint string", e.g. "local-hwclock:var-run-bad".
4322 * Only things that are detected at runtime should be tagged
4323 * here. For stuff that is set during compilation, emit a warning
4324 * in the configuration phase. */
4328 buf
= new(char, sizeof("split-usr:"
4333 "overflowuid-not-65534:"
4334 "overflowgid-not-65534:"));
4342 e
= stpcpy(e
, "split-usr:");
4344 if (access("/proc/cgroups", F_OK
) < 0)
4345 e
= stpcpy(e
, "cgroups-missing:");
4347 if (cg_all_unified() == 0)
4348 e
= stpcpy(e
, "cgroupsv1:");
4350 if (clock_is_localtime(NULL
) > 0)
4351 e
= stpcpy(e
, "local-hwclock:");
4353 r
= readlink_malloc("/var/run", &destination
);
4354 if (r
< 0 || !PATH_IN_SET(destination
, "../run", "/run"))
4355 e
= stpcpy(e
, "var-run-bad:");
4357 r
= read_one_line_file("/proc/sys/kernel/overflowuid", &overflowuid
);
4358 if (r
>= 0 && !streq(overflowuid
, "65534"))
4359 e
= stpcpy(e
, "overflowuid-not-65534:");
4361 r
= read_one_line_file("/proc/sys/kernel/overflowgid", &overflowgid
);
4362 if (r
>= 0 && !streq(overflowgid
, "65534"))
4363 e
= stpcpy(e
, "overflowgid-not-65534:");
4365 /* remove the last ':' */
4372 void manager_ref_console(Manager
*m
) {
4378 void manager_unref_console(Manager
*m
) {
4380 assert(m
->n_on_console
> 0);
4383 if (m
->n_on_console
== 0)
4384 m
->no_console_output
= false; /* unset no_console_output flag, since the console is definitely free now */
4387 void manager_override_log_level(Manager
*m
, int level
) {
4388 _cleanup_free_
char *s
= NULL
;
4391 if (!m
->log_level_overridden
) {
4392 m
->original_log_level
= log_get_max_level();
4393 m
->log_level_overridden
= true;
4396 (void) log_level_to_string_alloc(level
, &s
);
4397 log_info("Setting log level to %s.", strna(s
));
4399 log_set_max_level(level
);
4402 void manager_restore_original_log_level(Manager
*m
) {
4403 _cleanup_free_
char *s
= NULL
;
4406 if (!m
->log_level_overridden
)
4409 (void) log_level_to_string_alloc(m
->original_log_level
, &s
);
4410 log_info("Restoring log level to original (%s).", strna(s
));
4412 log_set_max_level(m
->original_log_level
);
4413 m
->log_level_overridden
= false;
4416 void manager_override_log_target(Manager
*m
, LogTarget target
) {
4419 if (!m
->log_target_overridden
) {
4420 m
->original_log_target
= log_get_target();
4421 m
->log_target_overridden
= true;
4424 log_info("Setting log target to %s.", log_target_to_string(target
));
4425 log_set_target(target
);
4428 void manager_restore_original_log_target(Manager
*m
) {
4431 if (!m
->log_target_overridden
)
4434 log_info("Restoring log target to original %s.", log_target_to_string(m
->original_log_target
));
4436 log_set_target(m
->original_log_target
);
4437 m
->log_target_overridden
= false;
4440 ManagerTimestamp
manager_timestamp_initrd_mangle(ManagerTimestamp s
) {
4442 s
>= MANAGER_TIMESTAMP_SECURITY_START
&&
4443 s
<= MANAGER_TIMESTAMP_UNITS_LOAD_FINISH
)
4444 return s
- MANAGER_TIMESTAMP_SECURITY_START
+ MANAGER_TIMESTAMP_INITRD_SECURITY_START
;
4448 static const char *const manager_state_table
[_MANAGER_STATE_MAX
] = {
4449 [MANAGER_INITIALIZING
] = "initializing",
4450 [MANAGER_STARTING
] = "starting",
4451 [MANAGER_RUNNING
] = "running",
4452 [MANAGER_DEGRADED
] = "degraded",
4453 [MANAGER_MAINTENANCE
] = "maintenance",
4454 [MANAGER_STOPPING
] = "stopping",
4457 DEFINE_STRING_TABLE_LOOKUP(manager_state
, ManagerState
);
4459 static const char *const manager_timestamp_table
[_MANAGER_TIMESTAMP_MAX
] = {
4460 [MANAGER_TIMESTAMP_FIRMWARE
] = "firmware",
4461 [MANAGER_TIMESTAMP_LOADER
] = "loader",
4462 [MANAGER_TIMESTAMP_KERNEL
] = "kernel",
4463 [MANAGER_TIMESTAMP_INITRD
] = "initrd",
4464 [MANAGER_TIMESTAMP_USERSPACE
] = "userspace",
4465 [MANAGER_TIMESTAMP_FINISH
] = "finish",
4466 [MANAGER_TIMESTAMP_SECURITY_START
] = "security-start",
4467 [MANAGER_TIMESTAMP_SECURITY_FINISH
] = "security-finish",
4468 [MANAGER_TIMESTAMP_GENERATORS_START
] = "generators-start",
4469 [MANAGER_TIMESTAMP_GENERATORS_FINISH
] = "generators-finish",
4470 [MANAGER_TIMESTAMP_UNITS_LOAD_START
] = "units-load-start",
4471 [MANAGER_TIMESTAMP_UNITS_LOAD_FINISH
] = "units-load-finish",
4472 [MANAGER_TIMESTAMP_INITRD_SECURITY_START
] = "initrd-security-start",
4473 [MANAGER_TIMESTAMP_INITRD_SECURITY_FINISH
] = "initrd-security-finish",
4474 [MANAGER_TIMESTAMP_INITRD_GENERATORS_START
] = "initrd-generators-start",
4475 [MANAGER_TIMESTAMP_INITRD_GENERATORS_FINISH
] = "initrd-generators-finish",
4476 [MANAGER_TIMESTAMP_INITRD_UNITS_LOAD_START
] = "initrd-units-load-start",
4477 [MANAGER_TIMESTAMP_INITRD_UNITS_LOAD_FINISH
] = "initrd-units-load-finish",
4480 DEFINE_STRING_TABLE_LOOKUP(manager_timestamp
, ManagerTimestamp
);
4482 static const char* const oom_policy_table
[_OOM_POLICY_MAX
] = {
4483 [OOM_CONTINUE
] = "continue",
4484 [OOM_STOP
] = "stop",
4485 [OOM_KILL
] = "kill",
4488 DEFINE_STRING_TABLE_LOOKUP(oom_policy
, OOMPolicy
);