#include <assert.h>

#include <errno.h>

#include <string.h>

#include <sys/epoll.h>

#include <signal.h>

#include <sys/signalfd.h>

#include <sys/wait.h>

#include <unistd.h>

#include <sys/poll.h>

#include <sys/reboot.h>

#include <sys/ioctl.h>

#include <linux/kd.h>

#include <termios.h>

#include <fcntl.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <dirent.h>

#ifdef HAVE_AUDIT

#include <libaudit.h>

#endif

#include <systemd/sd-daemon.h>

#include "manager.h"

#include "hashmap.h"

#include "macro.h"

#include "strv.h"

#include "log.h"

#include "util.h"

#include "mkdir.h"

#include "ratelimit.h"

#include "cgroup.h"

#include "mount-setup.h"

#include "unit-name.h"

#include "dbus-unit.h"

#include "dbus-job.h"

#include "missing.h"

#include "path-lookup.h"

#include "special.h"

#include "bus-errors.h"

#include "exit-status.h"

#include "virt.h"

#include "watchdog.h"

#include "cgroup-util.h"

#define GC_QUEUE_ENTRIES_MAX 16

#define GC_QUEUE_USEC_MAX (10*USEC_PER_SEC)

#define NOTIFY_SOCKET_SYSTEM "/run/systemd/notify"

#define NOTIFY_SOCKET_USER "@/org/freedesktop/systemd1/notify"

static int manager_setup_notify(Manager *m) {

union {

struct sockaddr sa;

struct sockaddr_un un;

} sa;

struct epoll_event ev;

int one = 1, r;

mode_t u;

assert(m);

m->notify_watch.type = WATCH_NOTIFY;

if ((m->notify_watch.fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0)) < 0) {

log_error("Failed to allocate notification socket: %m");

return -errno;

}

zero(sa);

sa.sa.sa_family = AF_UNIX;

if (getpid() != 1)

snprintf(sa.un.sun_path, sizeof(sa.un.sun_path), NOTIFY_SOCKET_USER "/%llu", random_ull());

else {

unlink(NOTIFY_SOCKET_SYSTEM);

strncpy(sa.un.sun_path, NOTIFY_SOCKET_SYSTEM, sizeof(sa.un.sun_path));

}

if (sa.un.sun_path[0] == '@')

sa.un.sun_path[0] = 0;

u = umask(0111);

r = bind(m->notify_watch.fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1));

umask(u);

if (r < 0) {

log_error("bind() failed: %m");

return -errno;

}

if (setsockopt(m->notify_watch.fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0) {

log_error("SO_PASSCRED failed: %m");

return -errno;

}

zero(ev);

ev.events = EPOLLIN;

ev.data.ptr = &m->notify_watch;

if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->notify_watch.fd, &ev) < 0)

return -errno;

if (sa.un.sun_path[0] == 0)

sa.un.sun_path[0] = '@';

if (!(m->notify_socket = strdup(sa.un.sun_path)))

return -ENOMEM;

log_debug("Using notification socket %s", m->notify_socket);

return 0;

}

static int enable_special_signals(Manager *m) {

int fd;

assert(m);

/* Enable that we get SIGINT on control-alt-del. In containers

if (reboot(RB_DISABLE_CAD) < 0 && errno != EPERM)

log_warning("Failed to enable ctrl-alt-del handling: %m");

fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);

if (fd < 0) {

/* Support systems without virtual console */

if (fd != -ENOENT)

log_warning("Failed to open /dev/tty0: %m");

} else {

/* Enable that we get SIGWINCH on kbrequest */

if (ioctl(fd, KDSIGACCEPT, SIGWINCH) < 0)

log_warning("Failed to enable kbrequest handling: %s", strerror(errno));

close_nointr_nofail(fd);

}

return 0;

}

static int manager_setup_signals(Manager *m) {

sigset_t mask;

struct epoll_event ev;

struct sigaction sa;

assert(m);

/* We are not interested in SIGSTOP and friends. */

zero(sa);

sa.sa_handler = SIG_DFL;

sa.sa_flags = SA_NOCLDSTOP|SA_RESTART;

assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);

assert_se(sigemptyset(&mask) == 0);

sigset_add_many(&mask,

SIGCHLD, /* Child died */

SIGTERM, /* Reexecute daemon */

SIGHUP, /* Reload configuration */

SIGUSR1, /* systemd/upstart: reconnect to D-Bus */

SIGUSR2, /* systemd: dump status */

SIGINT, /* Kernel sends us this on control-alt-del */

SIGWINCH, /* Kernel sends us this on kbrequest (alt-arrowup) */

SIGPWR, /* Some kernel drivers and upsd send us this on power failure */

SIGRTMIN+0, /* systemd: start default.target */

SIGRTMIN+1, /* systemd: isolate rescue.target */

SIGRTMIN+2, /* systemd: isolate emergency.target */

SIGRTMIN+3, /* systemd: start halt.target */

SIGRTMIN+4, /* systemd: start poweroff.target */

SIGRTMIN+5, /* systemd: start reboot.target */

SIGRTMIN+6, /* systemd: start kexec.target */

SIGRTMIN+13, /* systemd: Immediate halt */

SIGRTMIN+14, /* systemd: Immediate poweroff */

SIGRTMIN+15, /* systemd: Immediate reboot */

SIGRTMIN+16, /* systemd: Immediate kexec */

SIGRTMIN+20, /* systemd: enable status messages */

SIGRTMIN+21, /* systemd: disable status messages */

SIGRTMIN+22, /* systemd: set log level to LOG_DEBUG */

SIGRTMIN+23, /* systemd: set log level to LOG_INFO */

SIGRTMIN+26, /* systemd: set log target to journal-or-kmsg */

SIGRTMIN+27, /* systemd: set log target to console */

SIGRTMIN+28, /* systemd: set log target to kmsg */

SIGRTMIN+29, /* systemd: set log target to syslog-or-kmsg */

-1);

assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);

m->signal_watch.type = WATCH_SIGNAL;

if ((m->signal_watch.fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC)) < 0)

return -errno;

zero(ev);

ev.events = EPOLLIN;

ev.data.ptr = &m->signal_watch;

if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->signal_watch.fd, &ev) < 0)

return -errno;

if (m->running_as == MANAGER_SYSTEM)

return enable_special_signals(m);

return 0;

}

static void manager_strip_environment(Manager *m) {

assert(m);

/* Remove variables from the inherited set that are part of

strv_remove_prefix(m->environment, "container=");

strv_remove_prefix(m->environment, "container_");

/* Remove variables from the inherited set that are part of

strv_remove_prefix(m->environment, "RD_");

}

int manager_new(ManagerRunningAs running_as, Manager **_m) {

Manager *m;

int r = -ENOMEM;

assert(_m);

assert(running_as >= 0);

assert(running_as < _MANAGER_RUNNING_AS_MAX);

if (!(m = new0(Manager, 1)))

return -ENOMEM;

dual_timestamp_get(&m->startup_timestamp);

m->running_as = running_as;

m->name_data_slot = m->conn_data_slot = m->subscribed_data_slot = -1;

m->exit_code = _MANAGER_EXIT_CODE_INVALID;

m->pin_cgroupfs_fd = -1;

#ifdef HAVE_AUDIT

m->audit_fd = -1;

#endif

m->signal_watch.fd = m->mount_watch.fd = m->udev_watch.fd = m->epoll_fd = m->dev_autofs_fd = m->swap_watch.fd = -1;

m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */

m->environment = strv_copy(environ);

if (!m->environment)

goto fail;

manager_strip_environment(m);

if (running_as == MANAGER_SYSTEM) {

m->default_controllers = strv_new("cpu", NULL);

if (!m->default_controllers)

goto fail;

}

if (!(m->units = hashmap_new(string_hash_func, string_compare_func)))

goto fail;

if (!(m->jobs = hashmap_new(trivial_hash_func, trivial_compare_func)))

goto fail;

if (!(m->transaction_jobs = hashmap_new(trivial_hash_func, trivial_compare_func)))

goto fail;

if (!(m->watch_pids = hashmap_new(trivial_hash_func, trivial_compare_func)))

goto fail;

if (!(m->cgroup_bondings = hashmap_new(string_hash_func, string_compare_func)))

goto fail;

if (!(m->watch_bus = hashmap_new(string_hash_func, string_compare_func)))

goto fail;

if ((m->epoll_fd = epoll_create1(EPOLL_CLOEXEC)) < 0)

goto fail;

if ((r = lookup_paths_init(&m->lookup_paths, m->running_as, true)) < 0)

goto fail;

if ((r = manager_setup_signals(m)) < 0)

goto fail;

if ((r = manager_setup_cgroup(m)) < 0)

goto fail;

if ((r = manager_setup_notify(m)) < 0)

goto fail;

/* Try to connect to the busses, if possible. */

if ((r = bus_init(m, running_as != MANAGER_SYSTEM)) < 0)

goto fail;

#ifdef HAVE_AUDIT

if ((m->audit_fd = audit_open()) < 0 &&

/* If the kernel lacks netlink or audit support,

errno != EAFNOSUPPORT && errno != EPROTONOSUPPORT)

log_error("Failed to connect to audit log: %m");

#endif

m->taint_usr = dir_is_empty("/usr") > 0;

*_m = m;

return 0;

fail:

manager_free(m);

return r;

}

static unsigned manager_dispatch_cleanup_queue(Manager *m) {

Unit *u;

unsigned n = 0;

assert(m);

while ((u = m->cleanup_queue)) {

assert(u->in_cleanup_queue);

unit_free(u);

n++;

}

return n;

}

enum {

GC_OFFSET_IN_PATH, /* This one is on the path we were traveling */

GC_OFFSET_UNSURE, /* No clue */

GC_OFFSET_GOOD, /* We still need this unit */

GC_OFFSET_BAD, /* We don't need this unit anymore */

_GC_OFFSET_MAX

};

static void unit_gc_sweep(Unit *u, unsigned gc_marker) {

Iterator i;

Unit *other;

bool is_bad;

assert(u);

if (u->gc_marker == gc_marker + GC_OFFSET_GOOD ||

u->gc_marker == gc_marker + GC_OFFSET_BAD ||

u->gc_marker == gc_marker + GC_OFFSET_IN_PATH)

return;

if (u->in_cleanup_queue)

goto bad;

if (unit_check_gc(u))

goto good;

u->gc_marker = gc_marker + GC_OFFSET_IN_PATH;

is_bad = true;

SET_FOREACH(other, u->dependencies[UNIT_REFERENCED_BY], i) {

unit_gc_sweep(other, gc_marker);

if (other->gc_marker == gc_marker + GC_OFFSET_GOOD)

goto good;

if (other->gc_marker != gc_marker + GC_OFFSET_BAD)

is_bad = false;

}

if (is_bad)

goto bad;

/* We were unable to find anything out about this entry, so

u->gc_marker = gc_marker + GC_OFFSET_UNSURE;

unit_add_to_gc_queue(u);

return;

bad:

/* We definitely know that this one is not useful anymore, so

u->gc_marker = gc_marker + GC_OFFSET_BAD;

unit_add_to_cleanup_queue(u);

return;

good:

u->gc_marker = gc_marker + GC_OFFSET_GOOD;

}

static unsigned manager_dispatch_gc_queue(Manager *m) {

Unit *u;

unsigned n = 0;

unsigned gc_marker;

assert(m);

if ((m->n_in_gc_queue < GC_QUEUE_ENTRIES_MAX) &&

(m->gc_queue_timestamp <= 0 ||

(m->gc_queue_timestamp + GC_QUEUE_USEC_MAX) > now(CLOCK_MONOTONIC)))

return 0;

log_debug("Running GC...");

m->gc_marker += _GC_OFFSET_MAX;

if (m->gc_marker + _GC_OFFSET_MAX <= _GC_OFFSET_MAX)

m->gc_marker = 1;

gc_marker = m->gc_marker;

while ((u = m->gc_queue)) {

assert(u->in_gc_queue);

unit_gc_sweep(u, gc_marker);

LIST_REMOVE(Unit, gc_queue, m->gc_queue, u);

u->in_gc_queue = false;

n++;

if (u->gc_marker == gc_marker + GC_OFFSET_BAD ||

u->gc_marker == gc_marker + GC_OFFSET_UNSURE) {

log_debug("Collecting %s", u->id);

u->gc_marker = gc_marker + GC_OFFSET_BAD;

unit_add_to_cleanup_queue(u);

}

}

m->n_in_gc_queue = 0;

m->gc_queue_timestamp = 0;

return n;

}

static void manager_clear_jobs_and_units(Manager *m) {

Job *j;

Unit *u;

assert(m);

while ((j = hashmap_first(m->transaction_jobs)))

job_free(j);

while ((u = hashmap_first(m->units)))

unit_free(u);

manager_dispatch_cleanup_queue(m);

assert(!m->load_queue);

assert(!m->run_queue);

assert(!m->dbus_unit_queue);

assert(!m->dbus_job_queue);

assert(!m->cleanup_queue);

assert(!m->gc_queue);

assert(hashmap_isempty(m->transaction_jobs));

assert(hashmap_isempty(m->jobs));

assert(hashmap_isempty(m->units));

}

void manager_free(Manager *m) {

UnitType c;

assert(m);

manager_clear_jobs_and_units(m);

for (c = 0; c < _UNIT_TYPE_MAX; c++)

if (unit_vtable[c]->shutdown)

unit_vtable[c]->shutdown(m);

/* If we reexecute ourselves, we keep the root cgroup

manager_shutdown_cgroup(m, m->exit_code != MANAGER_REEXECUTE);

manager_undo_generators(m);

bus_done(m);

hashmap_free(m->units);

hashmap_free(m->jobs);

hashmap_free(m->transaction_jobs);

hashmap_free(m->watch_pids);

hashmap_free(m->watch_bus);

if (m->epoll_fd >= 0)

close_nointr_nofail(m->epoll_fd);

if (m->signal_watch.fd >= 0)

close_nointr_nofail(m->signal_watch.fd);

if (m->notify_watch.fd >= 0)

close_nointr_nofail(m->notify_watch.fd);

#ifdef HAVE_AUDIT

if (m->audit_fd >= 0)

audit_close(m->audit_fd);

#endif

free(m->notify_socket);

lookup_paths_free(&m->lookup_paths);

strv_free(m->environment);

strv_free(m->default_controllers);

hashmap_free(m->cgroup_bondings);

set_free_free(m->unit_path_cache);

free(m);

}

int manager_enumerate(Manager *m) {

int r = 0, q;

UnitType c;

assert(m);

/* Let's ask every type to load all units from disk/kernel

for (c = 0; c < _UNIT_TYPE_MAX; c++)

if (unit_vtable[c]->enumerate)

if ((q = unit_vtable[c]->enumerate(m)) < 0)

r = q;

manager_dispatch_load_queue(m);

return r;

}

int manager_coldplug(Manager *m) {

int r = 0, q;

Iterator i;

Unit *u;

char *k;

assert(m);

/* Then, let's set up their initial state. */

HASHMAP_FOREACH_KEY(u, k, m->units, i) {

/* ignore aliases */

if (u->id != k)

continue;

if ((q = unit_coldplug(u)) < 0)

r = q;

}

return r;

}

static void manager_build_unit_path_cache(Manager *m) {

char **i;

DIR *d = NULL;

int r;

assert(m);

set_free_free(m->unit_path_cache);

if (!(m->unit_path_cache = set_new(string_hash_func, string_compare_func))) {

log_error("Failed to allocate unit path cache.");

return;

}

/* This simply builds a list of files we know exist, so that

STRV_FOREACH(i, m->lookup_paths.unit_path) {

struct dirent *de;

if (!(d = opendir(*i))) {

log_error("Failed to open directory: %m");

continue;

}

while ((de = readdir(d))) {

char *p;

if (ignore_file(de->d_name))

continue;

p = join(streq(*i, "/") ? "" : *i, "/", de->d_name, NULL);

if (!p) {

r = -ENOMEM;

goto fail;

}

if ((r = set_put(m->unit_path_cache, p)) < 0) {

free(p);

goto fail;

}

}

closedir(d);

d = NULL;

}

return;

fail:

log_error("Failed to build unit path cache: %s", strerror(-r));

set_free_free(m->unit_path_cache);

m->unit_path_cache = NULL;

if (d)

closedir(d);

}

int manager_startup(Manager *m, FILE *serialization, FDSet *fds) {

int r, q;

assert(m);

manager_run_generators(m);

manager_build_unit_path_cache(m);

/* If we will deserialize make sure that during enumeration

if (serialization)

m->n_reloading ++;

/* First, enumerate what we can from all config files */

r = manager_enumerate(m);

/* Second, deserialize if there is something to deserialize */

if (serialization)

if ((q = manager_deserialize(m, serialization, fds)) < 0)

r = q;

/* Third, fire things up! */

if ((q = manager_coldplug(m)) < 0)

r = q;

if (serialization) {

assert(m->n_reloading > 0);

m->n_reloading --;

}

return r;

}

static void transaction_unlink_job(Manager *m, Job *j, bool delete_dependencies);

static void transaction_delete_job(Manager *m, Job *j, bool delete_dependencies) {

assert(m);

assert(j);

/* Deletes one job from the transaction */

transaction_unlink_job(m, j, delete_dependencies);

if (!j->installed)

job_free(j);

}

static void transaction_delete_unit(Manager *m, Unit *u) {

Job *j;

/* Deletes all jobs associated with a certain unit from the

while ((j = hashmap_get(m->transaction_jobs, u)))

transaction_delete_job(m, j, true);

}

static void transaction_clean_dependencies(Manager *m) {

Iterator i;

Job *j;

assert(m);

/* Drops all dependencies of all installed jobs */

HASHMAP_FOREACH(j, m->jobs, i) {

while (j->subject_list)

job_dependency_free(j->subject_list);

while (j->object_list)

job_dependency_free(j->object_list);

}

assert(!m->transaction_anchor);

}

static void transaction_abort(Manager *m) {

Job *j;

assert(m);

while ((j = hashmap_first(m->transaction_jobs)))

if (j->installed)

transaction_delete_job(m, j, true);

else {

transaction_unlink_job(m, j, true);

job_free(j);

}

assert(hashmap_isempty(m->transaction_jobs));

transaction_clean_dependencies(m);

}

static void transaction_find_jobs_that_matter_to_anchor(Manager *m, Job *j, unsigned generation) {

JobDependency *l;

assert(m);

/* A recursive sweep through the graph that marks all units

if (j)

l = j->subject_list;

else

l = m->transaction_anchor;

LIST_FOREACH(subject, l, l) {

/* This link does not matter */

if (!l->matters)

continue;

/* This unit has already been marked */

if (l->object->generation == generation)

continue;

l->object->matters_to_anchor = true;

l->object->generation = generation;

transaction_find_jobs_that_matter_to_anchor(m, l->object, generation);

}

}

static void transaction_merge_and_delete_job(Manager *m, Job *j, Job *other, JobType t) {

JobDependency *l, *last;

assert(j);

assert(other);

assert(j->unit == other->unit);

assert(!j->installed);

/* Merges 'other' into 'j' and then deletes 'other'. */

j->type = t;

j->state = JOB_WAITING;

j->override = j->override || other->override;

j->matters_to_anchor = j->matters_to_anchor || other->matters_to_anchor;

/* Patch us in as new owner of the JobDependency objects */

last = NULL;

LIST_FOREACH(subject, l, other->subject_list) {

assert(l->subject == other);

l->subject = j;

last = l;

}

/* Merge both lists */

if (last) {

last->subject_next = j->subject_list;

if (j->subject_list)

j->subject_list->subject_prev = last;

j->subject_list = other->subject_list;

}

/* Patch us in as new owner of the JobDependency objects */

last = NULL;

LIST_FOREACH(object, l, other->object_list) {

assert(l->object == other);

l->object = j;

last = l;

}

/* Merge both lists */

if (last) {

last->object_next = j->object_list;

if (j->object_list)

j->object_list->object_prev = last;

j->object_list = other->object_list;

}

/* Kill the other job */

other->subject_list = NULL;

other->object_list = NULL;

transaction_delete_job(m, other, true);

}

static bool job_is_conflicted_by(Job *j) {

JobDependency *l;

assert(j);

/* Returns true if this job is pulled in by a least one

LIST_FOREACH(object, l, j->object_list)

if (l->conflicts)

return true;

return false;

}

static int delete_one_unmergeable_job(Manager *m, Job *j) {

Job *k;

assert(j);

/* Tries to delete one item in the linked list

/* We rely here on the fact that if a merged with b does not

LIST_FOREACH(transaction, j, j)

LIST_FOREACH(transaction, k, j->transaction_next) {

Job *d;

/* Is this one mergeable? Then skip it */

if (job_type_is_mergeable(j->type, k->type))

continue;

/* Ok, we found two that conflict, let's see if we can

if (!j->matters_to_anchor && !k->matters_to_anchor) {

/* Both jobs don't matter, so let's

log_debug("Looking at job %s/%s conflicted_by=%s", j->unit->id, job_type_to_string(j->type), yes_no(j->type == JOB_STOP && job_is_conflicted_by(j)));

log_debug("Looking at job %s/%s conflicted_by=%s", k->unit->id, job_type_to_string(k->type), yes_no(k->type == JOB_STOP && job_is_conflicted_by(k)));

if (j->type == JOB_STOP) {

if (job_is_conflicted_by(j))

d = k;

else

d = j;

} else if (k->type == JOB_STOP) {

if (job_is_conflicted_by(k))

d = j;

else

d = k;

} else

d = j;

} else if (!j->matters_to_anchor)

d = j;

else if (!k->matters_to_anchor)

d = k;

else

return -ENOEXEC;

/* Ok, we can drop one, so let's do so. */

log_debug("Fixing conflicting jobs by deleting job %s/%s", d->unit->id, job_type_to_string(d->type));

transaction_delete_job(m, d, true);

return 0;

}

return -EINVAL;

}

static int transaction_merge_jobs(Manager *m, DBusError *e) {

Job *j;

Iterator i;

int r;

assert(m);

/* First step, check whether any of the jobs for one specific

HASHMAP_FOREACH(j, m->transaction_jobs, i) {

JobType t;

Job *k;

t = j->type;

LIST_FOREACH(transaction, k, j->transaction_next) {

if (job_type_merge(&t, k->type) >= 0)

continue;

/* OK, we could not merge all jobs for this

if ((r = delete_one_unmergeable_job(m, j)) >= 0)

/* Ok, we managed to drop one, now

return -EAGAIN;

/* We couldn't merge anything. Failure */

dbus_set_error(e, BUS_ERROR_TRANSACTION_JOBS_CONFLICTING, "Transaction contains conflicting jobs '%s' and '%s' for %s. Probably contradicting requirement dependencies configured.",

job_type_to_string(t), job_type_to_string(k->type), k->unit->id);

return r;

}

}

/* Second step, merge the jobs. */

HASHMAP_FOREACH(j, m->transaction_jobs, i) {

JobType t = j->type;

Job *k;

/* Merge all transactions */

LIST_FOREACH(transaction, k, j->transaction_next)

assert_se(job_type_merge(&t, k->type) == 0);

/* If an active job is mergeable, merge it too */

if (j->unit->job)

job_type_merge(&t, j->unit->job->type); /* Might fail. Which is OK */

while ((k = j->transaction_next)) {

if (j->installed) {

transaction_merge_and_delete_job(m, k, j, t);

j = k;

} else

transaction_merge_and_delete_job(m, j, k, t);

}

if (j->unit->job && !j->installed)

transaction_merge_and_delete_job(m, j, j->unit->job, t);

assert(!j->transaction_next);

assert(!j->transaction_prev);

}

return 0;

}

static void transaction_drop_redundant(Manager *m) {

bool again;

assert(m);

/* Goes through the transaction and removes all jobs that are

do {

Job *j;

Iterator i;

again = false;

HASHMAP_FOREACH(j, m->transaction_jobs, i) {

bool changes_something = false;

Job *k;

LIST_FOREACH(transaction, k, j) {

if (!job_is_anchor(k) &&

(k->installed || job_type_is_redundant(k->type, unit_active_state(k->unit))) &&

(!k->unit->job || !job_type_is_conflicting(k->type, k->unit->job->type)))

continue;

changes_something = true;

break;

}

if (changes_something)

continue;

/* log_debug("Found redundant job %s/%s, dropping.", j->unit->id, job_type_to_string(j->type)); */

transaction_delete_job(m, j, false);

again = true;

break;

}

} while (again);

}

static bool unit_matters_to_anchor(Unit *u, Job *j) {

assert(u);

assert(!j->transaction_prev);

/* Checks whether at least one of the jobs for this unit

LIST_FOREACH(transaction, j, j)

if (j->matters_to_anchor)

return true;

return false;

}

static int transaction_verify_order_one(Manager *m, Job *j, Job *from, unsigned generation, DBusError *e) {

Iterator i;

Unit *u;

int r;

assert(m);

assert(j);

assert(!j->transaction_prev);

/* Does a recursive sweep through the ordering graph, looking

/* Have we seen this before? */

if (j->generation == generation) {

Job *k, *delete;

/* If the marker is NULL we have been here already and

if (!j->marker)

return 0;

/* So, the marker is not NULL and we already have been

log_warning("Found ordering cycle on %s/%s", j->unit->id, job_type_to_string(j->type));

delete = NULL;

for (k = from; k; k = ((k->generation == generation && k->marker != k) ? k->marker : NULL)) {

log_info("Walked on cycle path to %s/%s", k->unit->id, job_type_to_string(k->type));

if (!delete &&

!k->installed &&

!unit_matters_to_anchor(k->unit, k)) {

/* Ok, we can drop this one, so let's

delete = k;

}

/* Check if this in fact was the beginning of

if (k == j)

break;

}

if (delete) {

log_warning("Breaking ordering cycle by deleting job %s/%s", delete->unit->id, job_type_to_string(delete->type));

transaction_delete_unit(m, delete->unit);

return -EAGAIN;

}

log_error("Unable to break cycle");

dbus_set_error(e, BUS_ERROR_TRANSACTION_ORDER_IS_CYCLIC, "Transaction order is cyclic. See system logs for details.");

return -ENOEXEC;

}

/* Make the marker point to where we come from, so that we can

j->marker = from ? from : j;

j->generation = generation;

/* We assume that the the dependencies are bidirectional, and

SET_FOREACH(u, j->unit->dependencies[UNIT_BEFORE], i) {

Job *o;

/* Is there a job for this unit? */

if (!(o = hashmap_get(m->transaction_jobs, u)))

/* Ok, there is no job for this in the

if (!(o = u->job))

continue;

if ((r = transaction_verify_order_one(m, o, j, generation, e)) < 0)

return r;

}

/* Ok, let's backtrack, and remember that this entry is not on

j->marker = NULL;

return 0;

}

static int transaction_verify_order(Manager *m, unsigned *generation, DBusError *e) {

Job *j;

int r;

Iterator i;

unsigned g;

assert(m);

assert(generation);

/* Check if the ordering graph is cyclic. If it is, try to fix

g = (*generation)++;

HASHMAP_FOREACH(j, m->transaction_jobs, i)

if ((r = transaction_verify_order_one(m, j, NULL, g, e)) < 0)

return r;

return 0;

}

static void transaction_collect_garbage(Manager *m) {

bool again;

assert(m);

/* Drop jobs that are not required by any other job */

do {

Iterator i;

Job *j;

again = false;

HASHMAP_FOREACH(j, m->transaction_jobs, i) {

if (j->object_list) {

/* log_debug("Keeping job %s/%s because of %s/%s", */

/* j->unit->id, job_type_to_string(j->type), */

/* j->object_list->subject ? j->object_list->subject->unit->id : "root", */

/* j->object_list->subject ? job_type_to_string(j->object_list->subject->type) : "root"); */

continue;

}

/* log_debug("Garbage collecting job %s/%s", j->unit->id, job_type_to_string(j->type)); */

transaction_delete_job(m, j, true);

again = true;

break;

}

} while (again);

}

static int transaction_is_destructive(Manager *m, DBusError *e) {

Iterator i;

Job *j;

assert(m);

/* Checks whether applying this transaction means that

HASHMAP_FOREACH(j, m->transaction_jobs, i) {

/* Assume merged */

assert(!j->transaction_prev);

assert(!j->transaction_next);

if (j->unit->job &&

j->unit->job != j &&

!job_type_is_superset(j->type, j->unit->job->type)) {

dbus_set_error(e, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE, "Transaction is destructive.");

return -EEXIST;

}

}

return 0;

}

static void transaction_minimize_impact(Manager *m) {

bool again;

assert(m);

/* Drops all unnecessary jobs that reverse already active jobs

do {

Job *j;

Iterator i;

again = false;

HASHMAP_FOREACH(j, m->transaction_jobs, i) {

LIST_FOREACH(transaction, j, j) {

bool stops_running_service, changes_existing_job;

/* If it matters, we shouldn't drop it */

if (j->matters_to_anchor)

continue;

/* Would this stop a running service?

stops_running_service =

j->type == JOB_STOP && UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(j->unit));

changes_existing_job =

j->unit->job &&

job_type_is_conflicting(j->type, j->unit->job->type);

if (!stops_running_service && !changes_existing_job)

continue;

if (stops_running_service)

log_debug("%s/%s would stop a running service.", j->unit->id, job_type_to_string(j->type));

if (changes_existing_job)

log_debug("%s/%s would change existing job.", j->unit->id, job_type_to_string(j->type));

/* Ok, let's get rid of this */

log_debug("Deleting %s/%s to minimize impact.", j->unit->id, job_type_to_string(j->type));

transaction_delete_job(m, j, true);

again = true;

break;

}

if (again)

break;

}

} while (again);

}

static int transaction_apply(Manager *m, JobMode mode) {

Iterator i;

Job *j;

int r;

/* Moves the transaction jobs to the set of active jobs */

if (mode == JOB_ISOLATE) {

/* When isolating first kill all installed jobs which

rescan:

HASHMAP_FOREACH(j, m->jobs, i) {

assert(j->installed);

if (hashmap_get(m->transaction_jobs, j->unit))

continue;

/* 'j' itself is safe to remove, but if other jobs

if (job_finish_and_invalidate(j, JOB_CANCELED) > 0)

goto rescan;

}

}

HASHMAP_FOREACH(j, m->transaction_jobs, i) {

/* Assume merged */

assert(!j->transaction_prev);

assert(!j->transaction_next);

if (j->installed)

continue;

if ((r = hashmap_put(m->jobs, UINT32_TO_PTR(j->id), j)) < 0)

goto rollback;

}

while ((j = hashmap_steal_first(m->transaction_jobs))) {

if (j->installed) {

/* log_debug("Skipping already installed job %s/%s as %u", j->unit->id, job_type_to_string(j->type), (unsigned) j->id); */

continue;

}

if (j->unit->job)

job_free(j->unit->job);

j->unit->job = j;

j->installed = true;

m->n_installed_jobs ++;

/* We're fully installed. Now let's free data we don't

assert(!j->transaction_next);

assert(!j->transaction_prev);

job_add_to_run_queue(j);

job_add_to_dbus_queue(j);

job_start_timer(j);

log_debug("Installed new job %s/%s as %u", j->unit->id, job_type_to_string(j->type), (unsigned) j->id);

}

/* As last step, kill all remaining job dependencies. */

transaction_clean_dependencies(m);

return 0;

rollback:

HASHMAP_FOREACH(j, m->transaction_jobs, i) {

if (j->installed)

continue;

hashmap_remove(m->jobs, UINT32_TO_PTR(j->id));

}

return r;

}

static int transaction_activate(Manager *m, JobMode mode, DBusError *e) {

int r;

unsigned generation = 1;

assert(m);

/* This applies the changes recorded in transaction_jobs to

/* First step: figure out which jobs matter */

transaction_find_jobs_that_matter_to_anchor(m, NULL, generation++);

/* Second step: Try not to stop any running services if

if (mode == JOB_FAIL)

transaction_minimize_impact(m);

/* Third step: Drop redundant jobs */

transaction_drop_redundant(m);

for (;;) {

/* Fourth step: Let's remove unneeded jobs that might

if (mode != JOB_ISOLATE)

transaction_collect_garbage(m);

/* Fifth step: verify order makes sense and correct

if ((r = transaction_verify_order(m, &generation, e)) >= 0)

break;

if (r != -EAGAIN) {

log_warning("Requested transaction contains an unfixable cyclic ordering dependency: %s", bus_error(e, r));

goto rollback;

}

/* Let's see if the resulting transaction ordering

}

for (;;) {

/* Sixth step: let's drop unmergeable entries if

if ((r = transaction_merge_jobs(m, e)) >= 0)

break;

if (r != -EAGAIN) {

log_warning("Requested transaction contains unmergeable jobs: %s", bus_error(e, r));

goto rollback;

}

/* Seventh step: an entry got dropped, let's garbage

if (mode != JOB_ISOLATE)

transaction_collect_garbage(m);

/* Let's see if the resulting transaction still has

}

/* Eights step: Drop redundant jobs again, if the merging now allows us to drop more. */

transaction_drop_redundant(m);

/* Ninth step: check whether we can actually apply this */

if (mode == JOB_FAIL)

if ((r = transaction_is_destructive(m, e)) < 0) {

log_notice("Requested transaction contradicts existing jobs: %s", bus_error(e, r));

goto rollback;

}

/* Tenth step: apply changes */

if ((r = transaction_apply(m, mode)) < 0) {

log_warning("Failed to apply transaction: %s", strerror(-r));

goto rollback;

}

assert(hashmap_isempty(m->transaction_jobs));

assert(!m->transaction_anchor);

return 0;

rollback:

transaction_abort(m);

return r;

}

static Job* transaction_add_one_job(Manager *m, JobType type, Unit *unit, bool override, bool *is_new) {

Job *j, *f;

assert(m);

assert(unit);

/* Looks for an existing prospective job and returns that. If

f = hashmap_get(m->transaction_jobs, unit);

LIST_FOREACH(transaction, j, f) {

assert(j->unit == unit);

if (j->type == type) {

if (is_new)

*is_new = false;

return j;

}

}

if (unit->job && unit->job->type == type)

j = unit->job;

else if (!(j = job_new(m, type, unit)))

return NULL;

j->generation = 0;

j->marker = NULL;

j->matters_to_anchor = false;

j->override = override;

LIST_PREPEND(Job, transaction, f, j);

if (hashmap_replace(m->transaction_jobs, unit, f) < 0) {

LIST_REMOVE(Job, transaction, f, j);

job_free(j);

return NULL;

}

if (is_new)

*is_new = true;

/* log_debug("Added job %s/%s to transaction.", unit->id, job_type_to_string(type)); */

return j;

}

static void transaction_unlink_job(Manager *m, Job *j, bool delete_dependencies) {

assert(m);

assert(j);

if (j->transaction_prev)

j->transaction_prev->transaction_next = j->transaction_next;

else if (j->transaction_next)

hashmap_replace(m->transaction_jobs, j->unit, j->transaction_next);

else

hashmap_remove_value(m->transaction_jobs, j->unit, j);

if (j->transaction_next)

j->transaction_next->transaction_prev = j->transaction_prev;

j->transaction_prev = j->transaction_next = NULL;

while (j->subject_list)

job_dependency_free(j->subject_list);

while (j->object_list) {

Job *other = j->object_list->matters ? j->object_list->subject : NULL;

job_dependency_free(j->object_list);

if (other && delete_dependencies) {

log_debug("Deleting job %s/%s as dependency of job %s/%s",

other->unit->id, job_type_to_string(other->type),

j->unit->id, job_type_to_string(j->type));

transaction_delete_job(m, other, delete_dependencies);

}

}

}

static int transaction_add_job_and_dependencies(

Manager *m,

JobType type,

Unit *unit,

Job *by,

bool matters,

bool override,

bool conflicts,

bool ignore_requirements,

bool ignore_order,

DBusError *e,

Job **_ret) {

Job *ret;

Iterator i;

Unit *dep;

int r;

bool is_new;

assert(m);

assert(type < _JOB_TYPE_MAX);

assert(unit);

/* log_debug("Pulling in %s/%s from %s/%s", */

/* unit->id, job_type_to_string(type), */

/* by ? by->unit->id : "NA", */

/* by ? job_type_to_string(by->type) : "NA"); */

if (unit->load_state != UNIT_LOADED &&

unit->load_state != UNIT_ERROR &&

unit->load_state != UNIT_MASKED) {

dbus_set_error(e, BUS_ERROR_LOAD_FAILED, "Unit %s is not loaded properly.", unit->id);

return -EINVAL;

}

if (type != JOB_STOP && unit->load_state == UNIT_ERROR) {

dbus_set_error(e, BUS_ERROR_LOAD_FAILED,

"Unit %s failed to load: %s. "

"See system logs and 'systemctl status %s' for details.",

unit->id,

strerror(-unit->load_error),

unit->id);

return -EINVAL;

}

if (type != JOB_STOP && unit->load_state == UNIT_MASKED) {

dbus_set_error(e, BUS_ERROR_MASKED, "Unit %s is masked.", unit->id);

return -EINVAL;

}

if (!unit_job_is_applicable(unit, type)) {

dbus_set_error(e, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE, "Job type %s is not applicable for unit %s.", job_type_to_string(type), unit->id);

return -EBADR;

}

/* First add the job. */

if (!(ret = transaction_add_one_job(m, type, unit, override, &is_new)))

return -ENOMEM;

ret->ignore_order = ret->ignore_order || ignore_order;

/* Then, add a link to the job. */

if (!job_dependency_new(by, ret, matters, conflicts))

return -ENOMEM;

if (is_new && !ignore_requirements) {

Set *following;

/* If we are following some other unit, make sure we

if (unit_following_set(ret->unit, &following) > 0) {

SET_FOREACH(dep, following, i)

if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, false, override, false, false, ignore_order, e, NULL)) < 0) {

log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r));

if (e)

dbus_error_free(e);

}

set_free(following);

}

/* Finally, recursively add in all dependencies. */

if (type == JOB_START || type == JOB_RELOAD_OR_START) {

SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUIRES], i)

if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {

if (r != -EBADR)

goto fail;

if (e)

dbus_error_free(e);

}

SET_FOREACH(dep, ret->unit->dependencies[UNIT_BIND_TO], i)

if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {

if (r != -EBADR)

goto fail;

if (e)

dbus_error_free(e);

}

SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUIRES_OVERRIDABLE], i)

if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, !override, override, false, false, ignore_order, e, NULL)) < 0) {

log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r));

if (e)

dbus_error_free(e);

}

SET_FOREACH(dep, ret->unit->dependencies[UNIT_WANTS], i)

if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, false, false, false, false, ignore_order, e, NULL)) < 0) {

log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r));

if (e)

dbus_error_free(e);

}

SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUISITE], i)

if ((r = transaction_add_job_and_dependencies(m, JOB_VERIFY_ACTIVE, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {

if (r != -EBADR)

goto fail;

if (e)

dbus_error_free(e);

}

SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUISITE_OVERRIDABLE], i)

if ((r = transaction_add_job_and_dependencies(m, JOB_VERIFY_ACTIVE, dep, ret, !override, override, false, false, ignore_order, e, NULL)) < 0) {

log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r));

if (e)

dbus_error_free(e);

}

SET_FOREACH(dep, ret->unit->dependencies[UNIT_CONFLICTS], i)

if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, dep, ret, true, override, true, false, ignore_order, e, NULL)) < 0) {

if (r != -EBADR)

goto fail;

if (e)

dbus_error_free(e);

}

SET_FOREACH(dep, ret->unit->dependencies[UNIT_CONFLICTED_BY], i)

if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, dep, ret, false, override, false, false, ignore_order, e, NULL)) < 0) {

log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->id, bus_error(e, r));

if (e)

dbus_error_free(e);

}

}

if (type == JOB_STOP || type == JOB_RESTART || type == JOB_TRY_RESTART) {

SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUIRED_BY], i)

if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {

if (r != -EBADR)

goto fail;

if (e)

dbus_error_free(e);

}

SET_FOREACH(dep, ret->unit->dependencies[UNIT_BOUND_BY], i)

if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, true, override, false, false, ignore_order, e, NULL)) < 0) {

if (r != -EBADR)

goto fail;

if (e)

dbus_error_free(e);

}

}

if (type == JOB_RELOAD || type == JOB_RELOAD_OR_START) {

SET_FOREACH(dep, ret->unit->dependencies[UNIT_PROPAGATE_RELOAD_TO], i) {

r = transaction_add_job_and_dependencies(m, JOB_RELOAD, dep, ret, false, override, false, false, ignore_order, e, NULL);

if (r < 0) {

log_warning("Cannot add dependency reload job for unit %s, ignoring: %s", dep->id, bus_error(e, r));

if (e)

dbus_error_free(e);

}

}

}

/* JOB_VERIFY_STARTED, JOB_RELOAD require no dependency handling */

}

if (_ret)

*_ret = ret;

return 0;

fail:

return r;

}

static int transaction_add_isolate_jobs(Manager *m) {

Iterator i;

Unit *u;

char *k;

int r;

assert(m);

HASHMAP_FOREACH_KEY(u, k, m->units, i) {

/* ignore aliases */

if (u->id != k)

continue;

if (u->ignore_on_isolate)

continue;

/* No need to stop inactive jobs */

if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u)) && !u->job)

continue;

/* Is there already something listed for this? */

if (hashmap_get(m->transaction_jobs, u))

continue;

if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, u, NULL, true, false, false, false, false, NULL, NULL)) < 0)

log_warning("Cannot add isolate job for unit %s, ignoring: %s", u->id, strerror(-r));

}

return 0;

}

int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool override, DBusError *e, Job **_ret) {

int r;

Job *ret;

assert(m);

assert(type < _JOB_TYPE_MAX);

assert(unit);

assert(mode < _JOB_MODE_MAX);

if (mode == JOB_ISOLATE && type != JOB_START) {

dbus_set_error(e, BUS_ERROR_INVALID_JOB_MODE, "Isolate is only valid for start.");

return -EINVAL;

}

if (mode == JOB_ISOLATE && !unit->allow_isolate) {

dbus_set_error(e, BUS_ERROR_NO_ISOLATION, "Operation refused, unit may not be isolated.");

return -EPERM;

}

log_debug("Trying to enqueue job %s/%s/%s", unit->id, job_type_to_string(type), job_mode_to_string(mode));

if ((r = transaction_add_job_and_dependencies(m, type, unit, NULL, true, override, false,

mode == JOB_IGNORE_DEPENDENCIES || mode == JOB_IGNORE_REQUIREMENTS,

mode == JOB_IGNORE_DEPENDENCIES, e, &ret)) < 0) {

transaction_abort(m);

return r;

}

if (mode == JOB_ISOLATE)

if ((r = transaction_add_isolate_jobs(m)) < 0) {

transaction_abort(m);

return r;

}

if ((r = transaction_activate(m, mode, e)) < 0)

return r;

log_debug("Enqueued job %s/%s as %u", unit->id, job_type_to_string(type), (unsigned) ret->id);

if (_ret)

*_ret = ret;

return 0;

}

int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool override, DBusError *e, Job **_ret) {

Unit *unit;

int r;

assert(m);

assert(type < _JOB_TYPE_MAX);

assert(name);

assert(mode < _JOB_MODE_MAX);

if ((r = manager_load_unit(m, name, NULL, NULL, &unit)) < 0)

return r;

return manager_add_job(m, type, unit, mode, override, e, _ret);

}

Job *manager_get_job(Manager *m, uint32_t id) {

assert(m);

return hashmap_get(m->jobs, UINT32_TO_PTR(id));

}

Unit *manager_get_unit(Manager *m, const char *name) {

assert(m);

assert(name);

return hashmap_get(m->units, name);

}

unsigned manager_dispatch_load_queue(Manager *m) {

Unit *u;

unsigned n = 0;

assert(m);

/* Make sure we are not run recursively */

if (m->dispatching_load_queue)

return 0;

m->dispatching_load_queue = true;

/* Dispatches the load queue. Takes a unit from the queue and

while ((u = m->load_queue)) {

assert(u->in_load_queue);

unit_load(u);

n++;

}

m->dispatching_load_queue = false;

return n;

}

int manager_load_unit_prepare(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret) {

Unit *ret;

UnitType t;

int r;

assert(m);

assert(name || path);

/* This will prepare the unit for loading, but not actually

if (path && !is_path(path)) {

dbus_set_error(e, BUS_ERROR_INVALID_PATH, "Path %s is not absolute.", path);

return -EINVAL;

}

if (!name)

name = file_name_from_path(path);

t = unit_name_to_type(name);

if (t == _UNIT_TYPE_INVALID || !unit_name_is_valid_no_type(name, false)) {

dbus_set_error(e, BUS_ERROR_INVALID_NAME, "Unit name %s is not valid.", name);

return -EINVAL;

}

ret = manager_get_unit(m, name);

if (ret) {

*_ret = ret;

return 1;

}

ret = unit_new(m, unit_vtable[t]->object_size);

if (!ret)

return -ENOMEM;

if (path) {

ret->fragment_path = strdup(path);

if (!ret->fragment_path) {

unit_free(ret);

return -ENOMEM;

}

}

if ((r = unit_add_name(ret, name)) < 0) {

unit_free(ret);

return r;

}

unit_add_to_load_queue(ret);

unit_add_to_dbus_queue(ret);

unit_add_to_gc_queue(ret);

if (_ret)

*_ret = ret;

return 0;

}

int manager_load_unit(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret) {

int r;

assert(m);

/* This will load the service information files, but not actually

if ((r = manager_load_unit_prepare(m, name, path, e, _ret)) != 0)

return r;

manager_dispatch_load_queue(m);

if (_ret)

*_ret = unit_follow_merge(*_ret);

return 0;

}

void manager_dump_jobs(Manager *s, FILE *f, const char *prefix) {

Iterator i;

Job *j;

assert(s);

assert(f);

HASHMAP_FOREACH(j, s->jobs, i)

job_dump(j, f, prefix);

}

void manager_dump_units(Manager *s, FILE *f, const char *prefix) {

Iterator i;

Unit *u;

const char *t;

assert(s);

assert(f);

HASHMAP_FOREACH_KEY(u, t, s->units, i)

if (u->id == t)

unit_dump(u, f, prefix);

}

void manager_clear_jobs(Manager *m) {

Job *j;

assert(m);

transaction_abort(m);

while ((j = hashmap_first(m->jobs)))

job_finish_and_invalidate(j, JOB_CANCELED);

}

unsigned manager_dispatch_run_queue(Manager *m) {

Job *j;

unsigned n = 0;

if (m->dispatching_run_queue)

return 0;

m->dispatching_run_queue = true;

while ((j = m->run_queue)) {

assert(j->installed);

assert(j->in_run_queue);

job_run_and_invalidate(j);

n++;

}

m->dispatching_run_queue = false;

return n;

}

unsigned manager_dispatch_dbus_queue(Manager *m) {

Job *j;

Unit *u;

unsigned n = 0;

assert(m);

if (m->dispatching_dbus_queue)

return 0;

m->dispatching_dbus_queue = true;

while ((u = m->dbus_unit_queue)) {

assert(u->in_dbus_queue);

bus_unit_send_change_signal(u);

n++;

}

while ((j = m->dbus_job_queue)) {

assert(j->in_dbus_queue);

bus_job_send_change_signal(j);

n++;

}

m->dispatching_dbus_queue = false;

return n;

}

static int manager_process_notify_fd(Manager *m) {

ssize_t n;

assert(m);

for (;;) {

char buf[4096];

struct msghdr msghdr;

struct iovec iovec;

struct ucred *ucred;

union {

struct cmsghdr cmsghdr;

uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];

} control;

Unit *u;

char **tags;

zero(iovec);

iovec.iov_base = buf;

iovec.iov_len = sizeof(buf)-1;

zero(control);

zero(msghdr);

msghdr.msg_iov = &iovec;

msghdr.msg_iovlen = 1;

msghdr.msg_control = &control;

msghdr.msg_controllen = sizeof(control);

if ((n = recvmsg(m->notify_watch.fd, &msghdr, MSG_DONTWAIT)) <= 0) {

if (n >= 0)

return -EIO;

if (errno == EAGAIN || errno == EINTR)

break;

return -errno;

}

if (msghdr.msg_controllen < CMSG_LEN(sizeof(struct ucred)) ||

control.cmsghdr.cmsg_level != SOL_SOCKET ||

control.cmsghdr.cmsg_type != SCM_CREDENTIALS ||

control.cmsghdr.cmsg_len != CMSG_LEN(sizeof(struct ucred))) {

log_warning("Received notify message without credentials. Ignoring.");

continue;

}

ucred = (struct ucred*) CMSG_DATA(&control.cmsghdr);

if (!(u = hashmap_get(m->watch_pids, LONG_TO_PTR(ucred->pid))))

if (!(u = cgroup_unit_by_pid(m, ucred->pid))) {

log_warning("Cannot find unit for notify message of PID %lu.", (unsigned long) ucred->pid);

continue;

}

assert((size_t) n < sizeof(buf));

buf[n] = 0;

if (!(tags = strv_split(buf, "\n\r")))

return -ENOMEM;

log_debug("Got notification message for unit %s", u->id);

if (UNIT_VTABLE(u)->notify_message)

UNIT_VTABLE(u)->notify_message(u, ucred->pid, tags);

strv_free(tags);

}

return 0;

}

static int manager_dispatch_sigchld(Manager *m) {

assert(m);

for (;;) {

siginfo_t si;

Unit *u;

int r;

zero(si);

/* First we call waitd() for a PID and do not reap the

if (waitid(P_ALL, 0, &si, WEXITED|WNOHANG|WNOWAIT) < 0) {

if (errno == ECHILD)

break;

if (errno == EINTR)

continue;

return -errno;

}

if (si.si_pid <= 0)

break;

if (si.si_code == CLD_EXITED || si.si_code == CLD_KILLED || si.si_code == CLD_DUMPED) {

char *name = NULL;

get_process_comm(si.si_pid, &name);

log_debug("Got SIGCHLD for process %lu (%s)", (unsigned long) si.si_pid, strna(name));

free(name);

}

/* Let's flush any message the dying child might still

if ((r = manager_process_notify_fd(m)) < 0)

return r;

/* And now figure out the unit this belongs to */

if (!(u = hashmap_get(m->watch_pids, LONG_TO_PTR(si.si_pid))))

u = cgroup_unit_by_pid(m, si.si_pid);

/* And now, we actually reap the zombie. */

if (waitid(P_PID, si.si_pid, &si, WEXITED) < 0) {

if (errno == EINTR)

continue;

return -errno;

}

if (si.si_code != CLD_EXITED && si.si_code != CLD_KILLED && si.si_code != CLD_DUMPED)

continue;

log_debug("Child %lu died (code=%s, status=%i/%s)",

(long unsigned) si.si_pid,

sigchld_code_to_string(si.si_code),

si.si_status,

strna(si.si_code == CLD_EXITED

? exit_status_to_string(si.si_status, EXIT_STATUS_FULL)

: signal_to_string(si.si_status)));

if (!u)

continue;

log_debug("Child %lu belongs to %s", (long unsigned) si.si_pid, u->id);

hashmap_remove(m->watch_pids, LONG_TO_PTR(si.si_pid));

UNIT_VTABLE(u)->sigchld_event(u, si.si_pid, si.si_code, si.si_status);

}

return 0;

}

static int manager_start_target(Manager *m, const char *name, JobMode mode) {

int r;

DBusError error;

dbus_error_init(&error);

log_debug("Activating special unit %s", name);

if ((r = manager_add_job_by_name(m, JOB_START, name, mode, true, &error, NULL)) < 0)

log_error("Failed to enqueue %s job: %s", name, bus_error(&error, r));

dbus_error_free(&error);

return r;

}

static int manager_process_signal_fd(Manager *m) {

ssize_t n;

struct signalfd_siginfo sfsi;

bool sigchld = false;

assert(m);

for (;;) {

if ((n = read(m->signal_watch.fd, &sfsi, sizeof(sfsi))) != sizeof(sfsi)) {

if (n >= 0)

return -EIO;

if (errno == EINTR || errno == EAGAIN)

break;

return -errno;

}

if (sfsi.ssi_pid > 0) {

char *p = NULL;

get_process_comm(sfsi.ssi_pid, &p);

log_debug("Received SIG%s from PID %lu (%s).",

signal_to_string(sfsi.ssi_signo),

(unsigned long) sfsi.ssi_pid, strna(p));

free(p);

} else

log_debug("Received SIG%s.", signal_to_string(sfsi.ssi_signo));

switch (sfsi.ssi_signo) {

case SIGCHLD:

sigchld = true;

break;

case SIGTERM:

if (m->running_as == MANAGER_SYSTEM) {

/* This is for compatibility with the

m->exit_code = MANAGER_REEXECUTE;

break;

}

/* Fall through */

case SIGINT:

if (m->running_as == MANAGER_SYSTEM) {

manager_start_target(m, SPECIAL_CTRL_ALT_DEL_TARGET, JOB_REPLACE);

break;

}

/* Run the exit target if there is one, if not, just exit. */

if (manager_start_target(m, SPECIAL_EXIT_TARGET, JOB_REPLACE) < 0) {

m->exit_code = MANAGER_EXIT;

return 0;

}

break;

case SIGWINCH:

if (m->running_as == MANAGER_SYSTEM)

manager_start_target(m, SPECIAL_KBREQUEST_TARGET, JOB_REPLACE);

/* This is a nop on non-init */

break;

case SIGPWR:

if (m->running_as == MANAGER_SYSTEM)

manager_start_target(m, SPECIAL_SIGPWR_TARGET, JOB_REPLACE);

/* This is a nop on non-init */

break;

case SIGUSR1: {

Unit *u;

u = manager_get_unit(m, SPECIAL_DBUS_SERVICE);

if (!u || UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) {

log_info("Trying to reconnect to bus...");

bus_init(m, true);

}

if (!u || !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) {

log_info("Loading D-Bus service...");

manager_start_target(m, SPECIAL_DBUS_SERVICE, JOB_REPLACE);

}

break;

}

case SIGUSR2: {

FILE *f;

char *dump = NULL;

size_t size;

if (!(f = open_memstream(&dump, &size))) {

log_warning("Failed to allocate memory stream.");

break;

}

manager_dump_units(m, f, "\t");

manager_dump_jobs(m, f, "\t");

if (ferror(f)) {

fclose(f);

free(dump);

log_warning("Failed to write status stream");

break;

}

fclose(f);

log_dump(LOG_INFO, dump);

free(dump);

break;

}

case SIGHUP:

m->exit_code = MANAGER_RELOAD;

break;

default: {

/* Starting SIGRTMIN+0 */

static const char * const target_table[] = {

[0] = SPECIAL_DEFAULT_TARGET,

[1] = SPECIAL_RESCUE_TARGET,

[2] = SPECIAL_EMERGENCY_TARGET,

[3] = SPECIAL_HALT_TARGET,

[4] = SPECIAL_POWEROFF_TARGET,

[5] = SPECIAL_REBOOT_TARGET,

[6] = SPECIAL_KEXEC_TARGET

};

/* Starting SIGRTMIN+13, so that target halt and system halt are 10 apart */

static const ManagerExitCode code_table[] = {

[0] = MANAGER_HALT,

[1] = MANAGER_POWEROFF,

[2] = MANAGER_REBOOT,

[3] = MANAGER_KEXEC

};

if ((int) sfsi.ssi_signo >= SIGRTMIN+0 &&

(int) sfsi.ssi_signo < SIGRTMIN+(int) ELEMENTSOF(target_table)) {

int idx = (int) sfsi.ssi_signo - SIGRTMIN;

manager_start_target(m, target_table[idx],

(idx == 1 || idx == 2) ? JOB_ISOLATE : JOB_REPLACE);

break;

}

if ((int) sfsi.ssi_signo >= SIGRTMIN+13 &&

(int) sfsi.ssi_signo < SIGRTMIN+13+(int) ELEMENTSOF(code_table)) {

m->exit_code = code_table[sfsi.ssi_signo - SIGRTMIN - 13];

break;

}

switch (sfsi.ssi_signo - SIGRTMIN) {

case 20:

log_debug("Enabling showing of status.");

manager_set_show_status(m, true);

break;

case 21:

log_debug("Disabling showing of status.");

manager_set_show_status(m, false);

break;

case 22:

log_set_max_level(LOG_DEBUG);

log_notice("Setting log level to debug.");

break;

case 23:

log_set_max_level(LOG_INFO);

log_notice("Setting log level to info.");

break;

case 26:

log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);

log_notice("Setting log target to journal-or-kmsg.");

break;

case 27:

log_set_target(LOG_TARGET_CONSOLE);

log_notice("Setting log target to console.");

break;

case 28:

log_set_target(LOG_TARGET_KMSG);

log_notice("Setting log target to kmsg.");

break;

case 29:

log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);

log_notice("Setting log target to syslog-or-kmsg.");

break;

default:

log_warning("Got unhandled signal <%s>.", signal_to_string(sfsi.ssi_signo));

}

}

}

}

if (sigchld)

return manager_dispatch_sigchld(m);

return 0;

}

static int process_event(Manager *m, struct epoll_event *ev) {

int r;

Watch *w;

assert(m);

assert(ev);

assert_se(w = ev->data.ptr);

if (w->type == WATCH_INVALID)

return 0;

switch (w->type) {

case WATCH_SIGNAL:

/* An incoming signal? */

if (ev->events != EPOLLIN)

return -EINVAL;

if ((r = manager_process_signal_fd(m)) < 0)

return r;

break;

case WATCH_NOTIFY:

/* An incoming daemon notification event? */

if (ev->events != EPOLLIN)

return -EINVAL;

if ((r = manager_process_notify_fd(m)) < 0)

return r;

break;

case WATCH_FD:

/* Some fd event, to be dispatched to the units */

UNIT_VTABLE(w->data.unit)->fd_event(w->data.unit, w->fd, ev->events, w);

break;

case WATCH_UNIT_TIMER:

case WATCH_JOB_TIMER: {

uint64_t v;

ssize_t k;

/* Some timer event, to be dispatched to the units */

if ((k = read(w->fd, &v, sizeof(v))) != sizeof(v)) {

if (k < 0 && (errno == EINTR || errno == EAGAIN))

break;

return k < 0 ? -errno : -EIO;

}

if (w->type == WATCH_UNIT_TIMER)

UNIT_VTABLE(w->data.unit)->timer_event(w->data.unit, v, w);

else

job_timer_event(w->data.job, v, w);

break;

}

case WATCH_MOUNT:

/* Some mount table change, intended for the mount subsystem */

mount_fd_event(m, ev->events);

break;

case WATCH_SWAP:

/* Some swap table change, intended for the swap subsystem */

swap_fd_event(m, ev->events);

break;

case WATCH_UDEV:

/* Some notification from udev, intended for the device subsystem */

device_fd_event(m, ev->events);

break;

case WATCH_DBUS_WATCH:

bus_watch_event(m, w, ev->events);

break;

case WATCH_DBUS_TIMEOUT:

bus_timeout_event(m, w, ev->events);

break;

default:

log_error("event type=%i", w->type);

assert_not_reached("Unknown epoll event type.");

}

return 0;

}

int manager_loop(Manager *m) {

int r;

RATELIMIT_DEFINE(rl, 1*USEC_PER_SEC, 50000);

assert(m);

m->exit_code = MANAGER_RUNNING;

/* Release the path cache */

set_free_free(m->unit_path_cache);

m->unit_path_cache = NULL;

manager_check_finished(m);

/* There might still be some zombies hanging around from

r = manager_dispatch_sigchld(m);

if (r < 0)

return r;

while (m->exit_code == MANAGER_RUNNING) {

struct epoll_event event;

int n;

int wait_msec = -1;

if (m->runtime_watchdog > 0 && m->running_as == MANAGER_SYSTEM)

watchdog_ping();

if (!ratelimit_test(&rl)) {

/* Yay, something is going seriously wrong, pause a little */

log_warning("Looping too fast. Throttling execution a little.");

sleep(1);

continue;

}

if (manager_dispatch_load_queue(m) > 0)

continue;

if (manager_dispatch_run_queue(m) > 0)

continue;

if (bus_dispatch(m) > 0)

continue;

if (manager_dispatch_cleanup_queue(m) > 0)

continue;

if (manager_dispatch_gc_queue(m) > 0)

continue;

if (manager_dispatch_dbus_queue(m) > 0)

continue;

if (swap_dispatch_reload(m) > 0)

continue;

/* Sleep for half the watchdog time */

if (m->runtime_watchdog > 0 && m->running_as == MANAGER_SYSTEM) {

wait_msec = (int) (m->runtime_watchdog / 2 / USEC_PER_MSEC);

if (wait_msec <= 0)

wait_msec = 1;

} else

wait_msec = -1;

n = epoll_wait(m->epoll_fd, &event, 1, wait_msec);

if (n < 0) {

if (errno == EINTR)

continue;

return -errno;

} else if (n == 0)

continue;

assert(n == 1);

r = process_event(m, &event);

if (r < 0)

return r;

}

return m->exit_code;

}

int manager_get_unit_from_dbus_path(Manager *m, const char *s, Unit **_u) {

char *n;

Unit *u;

assert(m);

assert(s);

assert(_u);

if (!startswith(s, "/org/freedesktop/systemd1/unit/"))

return -EINVAL;

if (!(n = bus_path_unescape(s+31)))

return -ENOMEM;

u = manager_get_unit(m, n);

free(n);

if (!u)

return -ENOENT;

*_u = u;

return 0;

}

int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j) {

Job *j;

unsigned id;

int r;

assert(m);

assert(s);

assert(_j);

if (!startswith(s, "/org/freedesktop/systemd1/job/"))

return -EINVAL;

if ((r = safe_atou(s + 30, &id)) < 0)

return r;

if (!(j = manager_get_job(m, id)))

return -ENOENT;

*_j = j;

return 0;

}

void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success) {

#ifdef HAVE_AUDIT

char *p;

if (m->audit_fd < 0)

return;

/* Don't generate audit events if the service was already

if (m->n_reloading > 0)

return;

if (m->running_as != MANAGER_SYSTEM)

return;

if (u->type != UNIT_SERVICE)

return;

if (!(p = unit_name_to_prefix_and_instance(u->id))) {

log_error("Failed to allocate unit name for audit message: %s", strerror(ENOMEM));

return;

}

if (audit_log_user_comm_message(m->audit_fd, type, "", p, NULL, NULL, NULL, success) < 0) {

if (errno == EPERM) {

/* We aren't allowed to send audit messages?

audit_close(m->audit_fd);

m->audit_fd = -1;

} else

log_warning("Failed to send audit message: %m");

}

free(p);

#endif

}

void manager_send_unit_plymouth(Manager *m, Unit *u) {

int fd = -1;

union sockaddr_union sa;

int n = 0;

char *message = NULL;

/* Don't generate plymouth events if the service was already

if (m->n_reloading > 0)

return;

if (m->running_as != MANAGER_SYSTEM)

return;

if (u->type != UNIT_SERVICE &&

u->type != UNIT_MOUNT &&

u->type != UNIT_SWAP)

return;

/* We set SOCK_NONBLOCK here so that we rather drop the

if ((fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0)) < 0) {

log_error("socket() failed: %m");

return;

}

zero(sa);

sa.sa.sa_family = AF_UNIX;

strncpy(sa.un.sun_path+1, "/org/freedesktop/plymouthd", sizeof(sa.un.sun_path)-1);

if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1)) < 0) {

if (errno != EPIPE &&

errno != EAGAIN &&

errno != ENOENT &&

errno != ECONNREFUSED &&

errno != ECONNRESET &&

errno != ECONNABORTED)

log_error("connect() failed: %m");

goto finish;

}

if (asprintf(&message, "U\002%c%s%n", (int) (strlen(u->id) + 1), u->id, &n) < 0) {

log_error("Out of memory");

goto finish;

}

errno = 0;

if (write(fd, message, n + 1) != n + 1) {

if (errno != EPIPE &&

errno != EAGAIN &&

errno != ENOENT &&

errno != ECONNREFUSED &&

errno != ECONNRESET &&

errno != ECONNABORTED)

log_error("Failed to write Plymouth message: %m");

goto finish;

}

finish:

if (fd >= 0)

close_nointr_nofail(fd);

free(message);

}

void manager_dispatch_bus_name_owner_changed(

Manager *m,

const char *name,

const char* old_owner,

const char *new_owner) {

Unit *u;

assert(m);

assert(name);

if (!(u = hashmap_get(m->watch_bus, name)))

return;

UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner);

}

void manager_dispatch_bus_query_pid_done(

Manager *m,

const char *name,

pid_t pid) {

Unit *u;

assert(m);

assert(name);

assert(pid >= 1);

if (!(u = hashmap_get(m->watch_bus, name)))

return;

UNIT_VTABLE(u)->bus_query_pid_done(u, name, pid);

}

int manager_open_serialization(Manager *m, FILE **_f) {

char *path = NULL;

mode_t saved_umask;

int fd;

FILE *f;

assert(_f);

if (m->running_as == MANAGER_SYSTEM)

asprintf(&path, "/run/systemd/dump-%lu-XXXXXX", (unsigned long) getpid());

else

asprintf(&path, "/tmp/systemd-dump-%lu-XXXXXX", (unsigned long) getpid());

if (!path)

return -ENOMEM;

saved_umask = umask(0077);

fd = mkostemp(path, O_RDWR|O_CLOEXEC);

umask(saved_umask);

if (fd < 0) {

free(path);

return -errno;

}

unlink(path);

log_debug("Serializing state to %s", path);

free(path);

if (!(f = fdopen(fd, "w+")))

return -errno;

*_f = f;

return 0;

}

int manager_serialize(Manager *m, FILE *f, FDSet *fds) {

Iterator i;

Unit *u;

const char *t;

int r;

assert(m);

assert(f);

assert(fds);

m->n_reloading ++;

fprintf(f, "current-job-id=%i\n", m->current_job_id);

fprintf(f, "taint-usr=%s\n", yes_no(m->taint_usr));

dual_timestamp_serialize(f, "initrd-timestamp", &m->initrd_timestamp);

dual_timestamp_serialize(f, "startup-timestamp", &m->startup_timestamp);

dual_timestamp_serialize(f, "finish-timestamp", &m->finish_timestamp);

fputc('\n', f);

HASHMAP_FOREACH_KEY(u, t, m->units, i) {

if (u->id != t)

continue;

if (!unit_can_serialize(u))

continue;

/* Start marker */

fputs(u->id, f);

fputc('\n', f);

if ((r = unit_serialize(u, f, fds)) < 0) {

m->n_reloading --;

return r;

}

}

assert(m->n_reloading > 0);

m->n_reloading --;

if (ferror(f))

return -EIO;

r = bus_fdset_add_all(m, fds);

if (r < 0)

return r;

return 0;

}

int manager_deserialize(Manager *m, FILE *f, FDSet *fds) {

int r = 0;

assert(m);

assert(f);

log_debug("Deserializing state...");

m->n_reloading ++;

for (;;) {

char line[LINE_MAX], *l;

if (!fgets(line, sizeof(line), f)) {

if (feof(f))

r = 0;

else

r = -errno;

goto finish;

}

char_array_0(line);

l = strstrip(line);

if (l[0] == 0)

break;

if (startswith(l, "current-job-id=")) {

uint32_t id;

if (safe_atou32(l+15, &id) < 0)

log_debug("Failed to parse current job id value %s", l+15);

else

m->current_job_id = MAX(m->current_job_id, id);

} else if (startswith(l, "taint-usr=")) {

int b;

if ((b = parse_boolean(l+10)) < 0)

log_debug("Failed to parse taint /usr flag %s", l+10);

else

m->taint_usr = m->taint_usr || b;

} else if (startswith(l, "initrd-timestamp="))

dual_timestamp_deserialize(l+17, &m->initrd_timestamp);

else if (startswith(l, "startup-timestamp="))

dual_timestamp_deserialize(l+18, &m->startup_timestamp);

else if (startswith(l, "finish-timestamp="))

dual_timestamp_deserialize(l+17, &m->finish_timestamp);

else

log_debug("Unknown serialization item '%s'", l);

}

for (;;) {

Unit *u;

char name[UNIT_NAME_MAX+2];

/* Start marker */

if (!fgets(name, sizeof(name), f)) {

if (feof(f))

r = 0;

else

r = -errno;

goto finish;

}

char_array_0(name);

if ((r = manager_load_unit(m, strstrip(name), NULL, NULL, &u)) < 0)

goto finish;

if ((r = unit_deserialize(u, f, fds)) < 0)

goto finish;

}

finish:

if (ferror(f)) {

r = -EIO;

goto finish;

}

assert(m->n_reloading > 0);

m->n_reloading --;

return r;

}

int manager_reload(Manager *m) {

int r, q;

FILE *f;

FDSet *fds;

assert(m);

if ((r = manager_open_serialization(m, &f)) < 0)

return r;

m->n_reloading ++;

if (!(fds = fdset_new())) {

m->n_reloading --;

r = -ENOMEM;

goto finish;

}

if ((r = manager_serialize(m, f, fds)) < 0) {

m->n_reloading --;

goto finish;

}

if (fseeko(f, 0, SEEK_SET) < 0) {

m->n_reloading --;

r = -errno;

goto finish;

}

/* From here on there is no way back. */

manager_clear_jobs_and_units(m);

manager_undo_generators(m);

/* Find new unit paths */

lookup_paths_free(&m->lookup_paths);

if ((q = lookup_paths_init(&m->lookup_paths, m->running_as, true)) < 0)

r = q;

manager_run_generators(m);

manager_build_unit_path_cache(m);

/* First, enumerate what we can from all config files */

if ((q = manager_enumerate(m)) < 0)

r = q;

/* Second, deserialize our stored data */

if ((q = manager_deserialize(m, f, fds)) < 0)

r = q;

fclose(f);

f = NULL;

/* Third, fire things up! */

if ((q = manager_coldplug(m)) < 0)

r = q;

assert(m->n_reloading > 0);

m->n_reloading--;

finish:

if (f)

fclose(f);

if (fds)

fdset_free(fds);

return r;

}

bool manager_is_booting_or_shutting_down(Manager *m) {

Unit *u;

assert(m);

/* Is the initial job still around? */

if (manager_get_job(m, m->default_unit_job_id))

return true;

/* Is there a job for the shutdown target? */

u = manager_get_unit(m, SPECIAL_SHUTDOWN_TARGET);

if (u)

return !!u->job;

return false;

}

void manager_reset_failed(Manager *m) {

Unit *u;

Iterator i;

assert(m);

HASHMAP_FOREACH(u, m->units, i)

unit_reset_failed(u);

}

bool manager_unit_pending_inactive(Manager *m, const char *name) {

Unit *u;

assert(m);

assert(name);

/* Returns true if the unit is inactive or going down */

if (!(u = manager_get_unit(m, name)))

return true;

return unit_pending_inactive(u);

}

void manager_check_finished(Manager *m) {

char userspace[FORMAT_TIMESPAN_MAX], initrd[FORMAT_TIMESPAN_MAX], kernel[FORMAT_TIMESPAN_MAX], sum[FORMAT_TIMESPAN_MAX];

usec_t kernel_usec, initrd_usec, userspace_usec, total_usec;

assert(m);

if (dual_timestamp_is_set(&m->finish_timestamp))

return;

if (hashmap_size(m->jobs) > 0)

return;

dual_timestamp_get(&m->finish_timestamp);

if (m->running_as == MANAGER_SYSTEM && detect_container(NULL) <= 0) {

userspace_usec = m->finish_timestamp.monotonic - m->startup_timestamp.monotonic;

total_usec = m->finish_timestamp.monotonic;

if (dual_timestamp_is_set(&m->initrd_timestamp)) {

kernel_usec = m->initrd_timestamp.monotonic;

initrd_usec = m->startup_timestamp.monotonic - m->initrd_timestamp.monotonic;

log_info("Startup finished in %s (kernel) + %s (initrd) + %s (userspace) = %s.",

format_timespan(kernel, sizeof(kernel), kernel_usec),

format_timespan(initrd, sizeof(initrd), initrd_usec),

format_timespan(userspace, sizeof(userspace), userspace_usec),

format_timespan(sum, sizeof(sum), total_usec));

} else {

kernel_usec = m->startup_timestamp.monotonic;

initrd_usec = 0;

log_info("Startup finished in %s (kernel) + %s (userspace) = %s.",

format_timespan(kernel, sizeof(kernel), kernel_usec),

format_timespan(userspace, sizeof(userspace), userspace_usec),

format_timespan(sum, sizeof(sum), total_usec));

}

} else {

userspace_usec = initrd_usec = kernel_usec = 0;

total_usec = m->finish_timestamp.monotonic - m->startup_timestamp.monotonic;

log_debug("Startup finished in %s.",

format_timespan(sum, sizeof(sum), total_usec));

}

bus_broadcast_finished(m, kernel_usec, initrd_usec, userspace_usec, total_usec);

sd_notifyf(false,

"READY=1\nSTATUS=Startup finished in %s.",

format_timespan(sum, sizeof(sum), total_usec));

}

void manager_run_generators(Manager *m) {

DIR *d = NULL;

const char *generator_path;

const char *argv[3];

mode_t u;

assert(m);

generator_path = m->running_as == MANAGER_SYSTEM ? SYSTEM_GENERATOR_PATH : USER_GENERATOR_PATH;

if (!(d = opendir(generator_path))) {

if (errno == ENOENT)

return;