#include <errno.h>

#include <string.h>

#include <signal.h>

#include <sys/wait.h>

#include <unistd.h>

#include <sys/inotify.h>

#include <sys/epoll.h>

#include <sys/reboot.h>

#include <sys/ioctl.h>

#include <linux/kd.h>

#include <fcntl.h>

#include <dirent.h>

#include <sys/timerfd.h>

#ifdef HAVE_AUDIT

#include <libaudit.h>

#endif

#include "sd-daemon.h"

#include "sd-messages.h"

#include "hashmap.h"

#include "macro.h"

#include "strv.h"

#include "log.h"

#include "util.h"

#include "mkdir.h"

#include "ratelimit.h"

#include "locale-setup.h"

#include "unit-name.h"

#include "missing.h"

#include "rm-rf.h"

#include "path-lookup.h"

#include "special.h"

#include "exit-status.h"

#include "virt.h"

#include "watchdog.h"

#include "path-util.h"

#include "audit-fd.h"

#include "boot-timestamps.h"

#include "env-util.h"

#include "bus-common-errors.h"

#include "bus-error.h"

#include "bus-util.h"

#include "bus-kernel.h"

#include "time-util.h"

#include "process-util.h"

#include "terminal-util.h"

#include "signal-util.h"

#include "dbus.h"

#include "dbus-unit.h"

#include "dbus-job.h"

#include "dbus-manager.h"

#include "manager.h"

#include "transaction.h"

#define JOBS_IN_PROGRESS_WAIT_USEC (5*USEC_PER_SEC)

#define JOBS_IN_PROGRESS_PERIOD_USEC (USEC_PER_SEC / 3)

#define JOBS_IN_PROGRESS_PERIOD_DIVISOR 3

static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);

static int manager_dispatch_signal_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);

static int manager_dispatch_time_change_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);

static int manager_dispatch_idle_pipe_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);

static int manager_dispatch_jobs_in_progress(sd_event_source *source, usec_t usec, void *userdata);

static int manager_dispatch_run_queue(sd_event_source *source, void *userdata);

static int manager_run_generators(Manager *m);

static void manager_undo_generators(Manager *m);

static void manager_watch_jobs_in_progress(Manager *m) {

usec_t next;

int r;

assert(m);

if (m->jobs_in_progress_event_source)

return;

next = now(CLOCK_MONOTONIC) + JOBS_IN_PROGRESS_WAIT_USEC;

r = sd_event_add_time(

m->event,

&m->jobs_in_progress_event_source,

CLOCK_MONOTONIC,

next, 0,

manager_dispatch_jobs_in_progress, m);

if (r < 0)

return;

(void) sd_event_source_set_description(m->jobs_in_progress_event_source, "manager-jobs-in-progress");

}

#define CYLON_BUFFER_EXTRA (2*(sizeof(ANSI_RED_ON)-1) + sizeof(ANSI_HIGHLIGHT_RED_ON)-1 + 2*(sizeof(ANSI_HIGHLIGHT_OFF)-1))

static void draw_cylon(char buffer[], size_t buflen, unsigned width, unsigned pos) {

char *p = buffer;

assert(buflen >= CYLON_BUFFER_EXTRA + width + 1);

assert(pos <= width+1); /* 0 or width+1 mean that the center light is behind the corner */

if (pos > 1) {

if (pos > 2)

p = mempset(p, ' ', pos-2);

p = stpcpy(p, ANSI_RED_ON);

*p++ = '*';

}

if (pos > 0 && pos <= width) {

p = stpcpy(p, ANSI_HIGHLIGHT_RED_ON);

*p++ = '*';

}

p = stpcpy(p, ANSI_HIGHLIGHT_OFF);

if (pos < width) {

p = stpcpy(p, ANSI_RED_ON);

*p++ = '*';

if (pos < width-1)

p = mempset(p, ' ', width-1-pos);

strcpy(p, ANSI_HIGHLIGHT_OFF);

}

}

void manager_flip_auto_status(Manager *m, bool enable) {

assert(m);

if (enable) {

if (m->show_status == SHOW_STATUS_AUTO)

manager_set_show_status(m, SHOW_STATUS_TEMPORARY);

} else {

if (m->show_status == SHOW_STATUS_TEMPORARY)

manager_set_show_status(m, SHOW_STATUS_AUTO);

}

}

static void manager_print_jobs_in_progress(Manager *m) {

_cleanup_free_ char *job_of_n = NULL;

Iterator i;

Job *j;

unsigned counter = 0, print_nr;

char cylon[6 + CYLON_BUFFER_EXTRA + 1];

unsigned cylon_pos;

char time[FORMAT_TIMESPAN_MAX], limit[FORMAT_TIMESPAN_MAX] = "no limit";

uint64_t x;

assert(m);

assert(m->n_running_jobs > 0);

manager_flip_auto_status(m, true);

print_nr = (m->jobs_in_progress_iteration / JOBS_IN_PROGRESS_PERIOD_DIVISOR) % m->n_running_jobs;

HASHMAP_FOREACH(j, m->jobs, i)

if (j->state == JOB_RUNNING && counter++ == print_nr)

break;

/* m->n_running_jobs must be consistent with the contents of m->jobs,

assert(counter == print_nr + 1);

assert(j);

cylon_pos = m->jobs_in_progress_iteration % 14;

if (cylon_pos >= 8)

cylon_pos = 14 - cylon_pos;

draw_cylon(cylon, sizeof(cylon), 6, cylon_pos);

m->jobs_in_progress_iteration++;

if (m->n_running_jobs > 1) {

if (asprintf(&job_of_n, "(%u of %u) ", counter, m->n_running_jobs) < 0)

job_of_n = NULL;

}

format_timespan(time, sizeof(time), now(CLOCK_MONOTONIC) - j->begin_usec, 1*USEC_PER_SEC);

if (job_get_timeout(j, &x) > 0)

format_timespan(limit, sizeof(limit), x - j->begin_usec, 1*USEC_PER_SEC);

manager_status_printf(m, STATUS_TYPE_EPHEMERAL, cylon,

"%sA %s job is running for %s (%s / %s)",

strempty(job_of_n),

job_type_to_string(j->type),

unit_description(j->unit),

time, limit);

}

static int have_ask_password(void) {

_cleanup_closedir_ DIR *dir;

dir = opendir("/run/systemd/ask-password");

if (!dir) {

if (errno == ENOENT)

return false;

else

return -errno;

}

for (;;) {

struct dirent *de;

errno = 0;

de = readdir(dir);

if (!de && errno != 0)

return -errno;

if (!de)

return false;

if (startswith(de->d_name, "ask."))

return true;

}

}

static int manager_dispatch_ask_password_fd(sd_event_source *source,

int fd, uint32_t revents, void *userdata) {

Manager *m = userdata;

assert(m);

flush_fd(fd);

m->have_ask_password = have_ask_password();

if (m->have_ask_password < 0)

/* Log error but continue. Negative have_ask_password

log_error_errno(m->have_ask_password, "Failed to list /run/systemd/ask-password: %m");

return 0;

}

static void manager_close_ask_password(Manager *m) {

assert(m);

m->ask_password_event_source = sd_event_source_unref(m->ask_password_event_source);

m->ask_password_inotify_fd = safe_close(m->ask_password_inotify_fd);

m->have_ask_password = -EINVAL;

}

static int manager_check_ask_password(Manager *m) {

int r;

assert(m);

if (!m->ask_password_event_source) {

assert(m->ask_password_inotify_fd < 0);

mkdir_p_label("/run/systemd/ask-password", 0755);

m->ask_password_inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);

if (m->ask_password_inotify_fd < 0)

return log_error_errno(errno, "inotify_init1() failed: %m");

if (inotify_add_watch(m->ask_password_inotify_fd, "/run/systemd/ask-password", IN_CREATE|IN_DELETE|IN_MOVE) < 0) {

log_error_errno(errno, "Failed to add watch on /run/systemd/ask-password: %m");

manager_close_ask_password(m);

return -errno;

}

r = sd_event_add_io(m->event, &m->ask_password_event_source,

m->ask_password_inotify_fd, EPOLLIN,

manager_dispatch_ask_password_fd, m);

if (r < 0) {

log_error_errno(errno, "Failed to add event source for /run/systemd/ask-password: %m");

manager_close_ask_password(m);

return -errno;

}

(void) sd_event_source_set_description(m->ask_password_event_source, "manager-ask-password");

/* Queries might have been added meanwhile... */

manager_dispatch_ask_password_fd(m->ask_password_event_source,

m->ask_password_inotify_fd, EPOLLIN, m);

}

return m->have_ask_password;

}

static int manager_watch_idle_pipe(Manager *m) {

int r;

assert(m);

if (m->idle_pipe_event_source)

return 0;

if (m->idle_pipe[2] < 0)

return 0;

r = sd_event_add_io(m->event, &m->idle_pipe_event_source, m->idle_pipe[2], EPOLLIN, manager_dispatch_idle_pipe_fd, m);

if (r < 0)

return log_error_errno(r, "Failed to watch idle pipe: %m");

(void) sd_event_source_set_description(m->idle_pipe_event_source, "manager-idle-pipe");

return 0;

}

static void manager_close_idle_pipe(Manager *m) {

assert(m);

m->idle_pipe_event_source = sd_event_source_unref(m->idle_pipe_event_source);

safe_close_pair(m->idle_pipe);

safe_close_pair(m->idle_pipe + 2);

}

static int manager_setup_time_change(Manager *m) {

int r;

/* We only care for the cancellation event, hence we set the

struct itimerspec its = {

.it_value.tv_sec = TIME_T_MAX,

};

assert(m);

assert_cc(sizeof(time_t) == sizeof(TIME_T_MAX));

if (m->test_run)

return 0;

/* Uses TFD_TIMER_CANCEL_ON_SET to get notifications whenever

m->time_change_fd = timerfd_create(CLOCK_REALTIME, TFD_NONBLOCK|TFD_CLOEXEC);

if (m->time_change_fd < 0)

return log_error_errno(errno, "Failed to create timerfd: %m");

if (timerfd_settime(m->time_change_fd, TFD_TIMER_ABSTIME|TFD_TIMER_CANCEL_ON_SET, &its, NULL) < 0) {

log_debug_errno(errno, "Failed to set up TFD_TIMER_CANCEL_ON_SET, ignoring: %m");

m->time_change_fd = safe_close(m->time_change_fd);

return 0;

}

r = sd_event_add_io(m->event, &m->time_change_event_source, m->time_change_fd, EPOLLIN, manager_dispatch_time_change_fd, m);

if (r < 0)

return log_error_errno(r, "Failed to create time change event source: %m");

(void) sd_event_source_set_description(m->time_change_event_source, "manager-time-change");

log_debug("Set up TFD_TIMER_CANCEL_ON_SET timerfd.");

return 0;

}

static int enable_special_signals(Manager *m) {

_cleanup_close_ int fd = -1;

assert(m);

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

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

log_warning_errno(errno, "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_errno(errno, "Failed to open /dev/tty0: %m");

} else {

/* Enable that we get SIGWINCH on kbrequest */

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

log_warning_errno(errno, "Failed to enable kbrequest handling: %m");

}

return 0;

}

static int manager_setup_signals(Manager *m) {

struct sigaction sa = {

.sa_handler = SIG_DFL,

.sa_flags = SA_NOCLDSTOP|SA_RESTART,

};

sigset_t mask;

int r;

assert(m);

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

/* We make liberal use of realtime signals here. On

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 */

/* ... space for more special targets ... */

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

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

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

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

/* ... space for more immediate system state changes ... */

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+24, /* systemd: Immediate exit (--user only) */

/* .. one free signal here ... */

#if !defined(__hppa64__) && !defined(__hppa__)

/* Apparently Linux on hppa has fewer RT

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 (obsolete) */

/* ... one free signal here SIGRTMIN+30 ... */

#endif

-1);

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

m->signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);

if (m->signal_fd < 0)

return -errno;

r = sd_event_add_io(m->event, &m->signal_event_source, m->signal_fd, EPOLLIN, manager_dispatch_signal_fd, m);

if (r < 0)

return r;

(void) sd_event_source_set_description(m->signal_event_source, "manager-signal");

/* Process signals a bit earlier than the rest of things, but

r = sd_event_source_set_priority(m->signal_event_source, -5);

if (r < 0)

return r;

if (m->running_as == MANAGER_SYSTEM)

return enable_special_signals(m);

return 0;

}

static void manager_clean_environment(Manager *m) {

assert(m);

/* Let's remove some environment variables that we

strv_env_unset_many(

m->environment,

"NOTIFY_SOCKET",

"MAINPID",

"MANAGERPID",

"LISTEN_PID",

"LISTEN_FDS",

"WATCHDOG_PID",

"WATCHDOG_USEC",

NULL);

}

static int manager_default_environment(Manager *m) {

assert(m);

if (m->running_as == MANAGER_SYSTEM) {

/* The system manager always starts with a clean

m->environment = strv_new("PATH=" DEFAULT_PATH,

NULL);

/* Import locale variables LC_*= from configuration */

locale_setup(&m->environment);

} else {

/* The user manager passes its own environment

m->environment = strv_copy(environ);

}

if (!m->environment)

return -ENOMEM;

manager_clean_environment(m);

strv_sort(m->environment);

return 0;

}

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

static const char * const unit_log_fields[_MANAGER_RUNNING_AS_MAX] = {

[MANAGER_SYSTEM] = "UNIT=",

[MANAGER_USER] = "USER_UNIT=",

};

static const char * const unit_log_format_strings[_MANAGER_RUNNING_AS_MAX] = {

[MANAGER_SYSTEM] = "UNIT=%s",

[MANAGER_USER] = "USER_UNIT=%s",

};

Manager *m;

int r;

assert(_m);

assert(running_as >= 0);

assert(running_as < _MANAGER_RUNNING_AS_MAX);

m = new0(Manager, 1);

if (!m)

return -ENOMEM;

#ifdef ENABLE_EFI

if (running_as == MANAGER_SYSTEM && detect_container() <= 0)

boot_timestamps(&m->userspace_timestamp, &m->firmware_timestamp, &m->loader_timestamp);

#endif

m->running_as = running_as;

m->exit_code = _MANAGER_EXIT_CODE_INVALID;

m->default_timer_accuracy_usec = USEC_PER_MINUTE;

/* Prepare log fields we can use for structured logging */

m->unit_log_field = unit_log_fields[running_as];

m->unit_log_format_string = unit_log_format_strings[running_as];

m->idle_pipe[0] = m->idle_pipe[1] = m->idle_pipe[2] = m->idle_pipe[3] = -1;

m->pin_cgroupfs_fd = m->notify_fd = m->signal_fd = m->time_change_fd =

m->dev_autofs_fd = m->private_listen_fd = m->kdbus_fd = m->cgroup_inotify_fd = -1;

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

m->ask_password_inotify_fd = -1;

m->have_ask_password = -EINVAL; /* we don't know */

m->first_boot = -1;

m->test_run = test_run;

/* Reboot immediately if the user hits C-A-D more often than 7x per 2s */

RATELIMIT_INIT(m->ctrl_alt_del_ratelimit, 2 * USEC_PER_SEC, 7);

r = manager_default_environment(m);

if (r < 0)

goto fail;

r = hashmap_ensure_allocated(&m->units, &string_hash_ops);

if (r < 0)

goto fail;

r = hashmap_ensure_allocated(&m->jobs, NULL);

if (r < 0)

goto fail;

r = hashmap_ensure_allocated(&m->cgroup_unit, &string_hash_ops);

if (r < 0)

goto fail;

r = hashmap_ensure_allocated(&m->watch_bus, &string_hash_ops);

if (r < 0)

goto fail;

r = sd_event_default(&m->event);

if (r < 0)

goto fail;

r = sd_event_add_defer(m->event, &m->run_queue_event_source, manager_dispatch_run_queue, m);

if (r < 0)

goto fail;

r = sd_event_source_set_priority(m->run_queue_event_source, SD_EVENT_PRIORITY_IDLE);

if (r < 0)

goto fail;

r = sd_event_source_set_enabled(m->run_queue_event_source, SD_EVENT_OFF);

if (r < 0)

goto fail;

(void) sd_event_source_set_description(m->run_queue_event_source, "manager-run-queue");

r = manager_setup_signals(m);

if (r < 0)

goto fail;

r = manager_setup_cgroup(m);

if (r < 0)

goto fail;

r = manager_setup_time_change(m);

if (r < 0)

goto fail;

m->udev = udev_new();

if (!m->udev) {

r = -ENOMEM;

goto fail;

}

/* Note that we set up neither kdbus, nor the notify fd

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

*_m = m;

return 0;

fail:

manager_free(m);

return r;

}

static int manager_setup_notify(Manager *m) {

int r;

if (m->test_run)

return 0;

if (m->notify_fd < 0) {

_cleanup_close_ int fd = -1;

union sockaddr_union sa = {

.sa.sa_family = AF_UNIX,

};

static const int one = 1;

/* First free all secondary fields */

m->notify_socket = mfree(m->notify_socket);

m->notify_event_source = sd_event_source_unref(m->notify_event_source);

fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);

if (fd < 0)

return log_error_errno(errno, "Failed to allocate notification socket: %m");

if (m->running_as == MANAGER_SYSTEM)

m->notify_socket = strdup("/run/systemd/notify");

else {

const char *e;

e = getenv("XDG_RUNTIME_DIR");

if (!e) {

log_error_errno(errno, "XDG_RUNTIME_DIR is not set: %m");

return -EINVAL;

}

m->notify_socket = strappend(e, "/systemd/notify");

}

if (!m->notify_socket)

return log_oom();

(void) mkdir_parents_label(m->notify_socket, 0755);

(void) unlink(m->notify_socket);

strncpy(sa.un.sun_path, m->notify_socket, sizeof(sa.un.sun_path)-1);

r = bind(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path));

if (r < 0)

return log_error_errno(errno, "bind(%s) failed: %m", sa.un.sun_path);

r = setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));

if (r < 0)

return log_error_errno(errno, "SO_PASSCRED failed: %m");

m->notify_fd = fd;

fd = -1;

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

}

if (!m->notify_event_source) {

r = sd_event_add_io(m->event, &m->notify_event_source, m->notify_fd, EPOLLIN, manager_dispatch_notify_fd, m);

if (r < 0)

return log_error_errno(r, "Failed to allocate notify event source: %m");

/* Process signals a bit earlier than SIGCHLD, so that we can

r = sd_event_source_set_priority(m->notify_event_source, -7);

if (r < 0)

return log_error_errno(r, "Failed to set priority of notify event source: %m");

(void) sd_event_source_set_description(m->notify_event_source, "manager-notify");

}

return 0;

}

static int manager_setup_kdbus(Manager *m) {

_cleanup_free_ char *p = NULL;

assert(m);

if (m->test_run || m->kdbus_fd >= 0)

return 0;

if (!is_kdbus_available())

return -ESOCKTNOSUPPORT;

m->kdbus_fd = bus_kernel_create_bus(

m->running_as == MANAGER_SYSTEM ? "system" : "user",

m->running_as == MANAGER_SYSTEM, &p);

if (m->kdbus_fd < 0)

return log_debug_errno(m->kdbus_fd, "Failed to set up kdbus: %m");

log_debug("Successfully set up kdbus on %s", p);

return 0;

}

static int manager_connect_bus(Manager *m, bool reexecuting) {

bool try_bus_connect;

assert(m);

if (m->test_run)

return 0;

try_bus_connect =

m->kdbus_fd >= 0 ||

reexecuting ||

(m->running_as == MANAGER_USER && getenv("DBUS_SESSION_BUS_ADDRESS"));

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

return bus_init(m, try_bus_connect);

}

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);

/* 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(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) {

if (u->id)

log_unit_debug(u, "Collecting.");

u->gc_marker = gc_marker + GC_OFFSET_BAD;

unit_add_to_cleanup_queue(u);

}

}

m->n_in_gc_queue = 0;

return n;

}

static void manager_clear_jobs_and_units(Manager *m) {

Unit *u;

assert(m);

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->jobs));

assert(hashmap_isempty(m->units));

m->n_on_console = 0;

m->n_running_jobs = 0;

}

Manager* manager_free(Manager *m) {

UnitType c;

int i;

if (!m)

return NULL;

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->watch_pids1);

hashmap_free(m->watch_pids2);

hashmap_free(m->watch_bus);

set_free(m->startup_units);

set_free(m->failed_units);

sd_event_source_unref(m->signal_event_source);

sd_event_source_unref(m->notify_event_source);

sd_event_source_unref(m->time_change_event_source);

sd_event_source_unref(m->jobs_in_progress_event_source);

sd_event_source_unref(m->run_queue_event_source);

safe_close(m->signal_fd);

safe_close(m->notify_fd);

safe_close(m->time_change_fd);

safe_close(m->kdbus_fd);

manager_close_ask_password(m);

manager_close_idle_pipe(m);

udev_unref(m->udev);

sd_event_unref(m->event);

free(m->notify_socket);

lookup_paths_free(&m->lookup_paths);

strv_free(m->environment);

hashmap_free(m->cgroup_unit);

set_free_free(m->unit_path_cache);

free(m->switch_root);

free(m->switch_root_init);

for (i = 0; i < _RLIMIT_MAX; i++)

free(m->rlimit[i]);

assert(hashmap_isempty(m->units_requiring_mounts_for));

hashmap_free(m->units_requiring_mounts_for);

free(m);

return NULL;

}

int manager_enumerate(Manager *m) {

int r = 0;

UnitType c;

assert(m);

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

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

int q;

if (!unit_type_supported(c)) {

log_debug("Unit type .%s is not supported on this system.", unit_type_to_string(c));

continue;

}

if (!unit_vtable[c]->enumerate)

continue;

q = unit_vtable[c]->enumerate(m);

if (q < 0)

r = q;

}

manager_dispatch_load_queue(m);

return r;

}

static void manager_coldplug(Manager *m) {

Iterator i;

Unit *u;

char *k;

int r;

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;

r = unit_coldplug(u);

if (r < 0)

log_warning_errno(r, "We couldn't coldplug %s, proceeding anyway: %m", u->id);

}

}

static void manager_build_unit_path_cache(Manager *m) {

char **i;

_cleanup_closedir_ DIR *d = NULL;

int r;

assert(m);

set_free_free(m->unit_path_cache);

m->unit_path_cache = set_new(&string_hash_ops);

if (!m->unit_path_cache) {

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;

d = opendir(*i);

if (!d) {

if (errno != ENOENT)

log_error_errno(errno, "Failed to open directory %s: %m", *i);

continue;

}

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

char *p;

if (hidden_file(de->d_name))

continue;

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

if (!p) {

r = -ENOMEM;

goto fail;

}

r = set_consume(m->unit_path_cache, p);

if (r < 0)

goto fail;

}

closedir(d);

d = NULL;

}

return;

fail:

log_error_errno(r, "Failed to build unit path cache: %m");

set_free_free(m->unit_path_cache);

m->unit_path_cache = NULL;

}

static int manager_distribute_fds(Manager *m, FDSet *fds) {

Unit *u;

Iterator i;

int r;

assert(m);

HASHMAP_FOREACH(u, m->units, i) {

if (fdset_size(fds) <= 0)

break;

if (UNIT_VTABLE(u)->distribute_fds) {

r = UNIT_VTABLE(u)->distribute_fds(u, fds);

if (r < 0)

return r;

}

}

return 0;

}

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

int r, q;

assert(m);

dual_timestamp_get(&m->generators_start_timestamp);

r = manager_run_generators(m);

dual_timestamp_get(&m->generators_finish_timestamp);

if (r < 0)

return r;

r = lookup_paths_init(

&m->lookup_paths, m->running_as, true,

NULL,

m->generator_unit_path,

m->generator_unit_path_early,

m->generator_unit_path_late);

if (r < 0)

return r;

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 */

dual_timestamp_get(&m->units_load_start_timestamp);

r = manager_enumerate(m);

dual_timestamp_get(&m->units_load_finish_timestamp);

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

if (serialization)

r = manager_deserialize(m, serialization, fds);

/* Any fds left? Find some unit which wants them. This is

if (fdset_size(fds) > 0) {

q = manager_distribute_fds(m, fds);

if (q < 0 && r == 0)

r = q;

}

/* We might have deserialized the notify fd, but if we didn't

q = manager_setup_notify(m);

if (q < 0 && r == 0)

r = q;

/* We might have deserialized the kdbus control fd, but if we

manager_setup_kdbus(m);

manager_connect_bus(m, !!serialization);

bus_track_coldplug(m, &m->subscribed, &m->deserialized_subscribed);

/* Third, fire things up! */

manager_coldplug(m);

if (serialization) {

assert(m->n_reloading > 0);

m->n_reloading --;

/* Let's wait for the UnitNew/JobNew messages being

m->send_reloading_done = true;

}

return r;

}

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

int r;

Transaction *tr;

assert(m);

assert(type < _JOB_TYPE_MAX);

assert(unit);

assert(mode < _JOB_MODE_MAX);

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

return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Isolate is only valid for start.");

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

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

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

type = job_type_collapse(type, unit);

tr = transaction_new(mode == JOB_REPLACE_IRREVERSIBLY);

if (!tr)

return -ENOMEM;

r = transaction_add_job_and_dependencies(tr, type, unit, NULL, true, override, false,

mode == JOB_IGNORE_DEPENDENCIES || mode == JOB_IGNORE_REQUIREMENTS,

mode == JOB_IGNORE_DEPENDENCIES, e);

if (r < 0)

goto tr_abort;

if (mode == JOB_ISOLATE) {

r = transaction_add_isolate_jobs(tr, m);

if (r < 0)

goto tr_abort;

}

r = transaction_activate(tr, m, mode, e);

if (r < 0)

goto tr_abort;

log_unit_debug(unit,

"Enqueued job %s/%s as %u", unit->id,

job_type_to_string(type), (unsigned) tr->anchor_job->id);

if (_ret)

*_ret = tr->anchor_job;

transaction_free(tr);

return 0;

tr_abort:

transaction_abort(tr);

transaction_free(tr);

return r;

}

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

Unit *unit;

int r;

assert(m);

assert(type < _JOB_TYPE_MAX);

assert(name);

assert(mode < _JOB_MODE_MAX);

r = manager_load_unit(m, name, NULL, NULL, &unit);

if (r < 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,

sd_bus_error *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))

return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not absolute.", path);

if (!name)

name = basename(path);

t = unit_name_to_type(name);

if (t == _UNIT_TYPE_INVALID || !unit_name_is_valid(name, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE))

return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Unit name %s is not valid.", name);

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;

}

}

r = unit_add_name(ret, name);

if (r < 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,

sd_bus_error *e,

Unit **_ret) {

int r;

assert(m);

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

r = manager_load_unit_prepare(m, name, path, e, _ret);

if (r != 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);

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

/* No need to recurse. We're cancelling all jobs. */

job_finish_and_invalidate(j, JOB_CANCELED, false);

}

static int manager_dispatch_run_queue(sd_event_source *source, void *userdata) {

Manager *m = userdata;

Job *j;

assert(source);

assert(m);

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

assert(j->installed);

assert(j->in_run_queue);

job_run_and_invalidate(j);

}

if (m->n_running_jobs > 0)

manager_watch_jobs_in_progress(m);

if (m->n_on_console > 0)

manager_watch_idle_pipe(m);

return 1;

}

static 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;

if (m->send_reloading_done) {

m->send_reloading_done = false;

bus_manager_send_reloading(m, false);

}

if (m->queued_message)

bus_send_queued_message(m);

return n;

}

static void manager_invoke_notify_message(Manager *m, Unit *u, pid_t pid, char *buf, size_t n, FDSet *fds) {

_cleanup_strv_free_ char **tags = NULL;

assert(m);

assert(u);

assert(buf);

assert(n > 0);

tags = strv_split(buf, "\n\r");

if (!tags) {

log_oom();

return;

}

if (UNIT_VTABLE(u)->notify_message)

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

else

log_unit_debug(u, "Got notification message for unit. Ignoring.");

}

static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {

Manager *m = userdata;

ssize_t n;

int r;

assert(m);

assert(m->notify_fd == fd);

if (revents != EPOLLIN) {

log_warning("Got unexpected poll event for notify fd.");

return 0;

}

for (;;) {

_cleanup_fdset_free_ FDSet *fds = NULL;

char buf[NOTIFY_BUFFER_MAX+1];

struct iovec iovec = {

.iov_base = buf,

.iov_len = sizeof(buf)-1,

};

union {

struct cmsghdr cmsghdr;

uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) +

CMSG_SPACE(sizeof(int) * NOTIFY_FD_MAX)];

} control = {};

struct msghdr msghdr = {

.msg_iov = &iovec,

.msg_iovlen = 1,

.msg_control = &control,

.msg_controllen = sizeof(control),

};

struct cmsghdr *cmsg;

struct ucred *ucred = NULL;

bool found = false;

Unit *u1, *u2, *u3;

int *fd_array = NULL;

unsigned n_fds = 0;

n = recvmsg(m->notify_fd, &msghdr, MSG_DONTWAIT|MSG_CMSG_CLOEXEC);

if (n < 0) {

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

break;

return -errno;

}

CMSG_FOREACH(cmsg, &msghdr) {

if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) {

fd_array = (int*) CMSG_DATA(cmsg);

n_fds = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);

} else if (cmsg->cmsg_level == SOL_SOCKET &&

cmsg->cmsg_type == SCM_CREDENTIALS &&

cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) {

ucred = (struct ucred*) CMSG_DATA(cmsg);

}

}

if (n_fds > 0) {

assert(fd_array);

r = fdset_new_array(&fds, fd_array, n_fds);

if (r < 0) {

close_many(fd_array, n_fds);

return log_oom();

}

}

if (!ucred || ucred->pid <= 0) {

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

continue;

}

if ((size_t) n >= sizeof(buf)) {

log_warning("Received notify message exceeded maximum size. Ignoring.");

continue;

}

buf[n] = 0;

/* Notify every unit that might be interested, but try

u1 = manager_get_unit_by_pid_cgroup(m, ucred->pid);

if (u1) {

manager_invoke_notify_message(m, u1, ucred->pid, buf, n, fds);

found = true;

}

u2 = hashmap_get(m->watch_pids1, PID_TO_PTR(ucred->pid));

if (u2 && u2 != u1) {

manager_invoke_notify_message(m, u2, ucred->pid, buf, n, fds);

found = true;

}

u3 = hashmap_get(m->watch_pids2, PID_TO_PTR(ucred->pid));

if (u3 && u3 != u2 && u3 != u1) {

manager_invoke_notify_message(m, u3, ucred->pid, buf, n, fds);

found = true;

}

if (!found)

log_warning("Cannot find unit for notify message of PID "PID_FMT".", ucred->pid);

if (fdset_size(fds) > 0)

log_warning("Got auxiliary fds with notification message, closing all.");

}

return 0;

}

static void invoke_sigchld_event(Manager *m, Unit *u, siginfo_t *si) {

assert(m);

assert(u);

assert(si);

log_unit_debug(u, "Child "PID_FMT" belongs to %s", si->si_pid, u->id);

unit_unwatch_pid(u, si->si_pid);

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

}

static int manager_dispatch_sigchld(Manager *m) {

assert(m);

for (;;) {

siginfo_t 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) {

_cleanup_free_ char *name = NULL;

Unit *u1, *u2, *u3;

get_process_comm(si.si_pid, &name);

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

si.si_pid, strna(name),

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)));

/* And now figure out the unit this belongs

u1 = manager_get_unit_by_pid_cgroup(m, si.si_pid);

if (u1)

invoke_sigchld_event(m, u1, &si);

u2 = hashmap_get(m->watch_pids1, PID_TO_PTR(si.si_pid));

if (u2 && u2 != u1)

invoke_sigchld_event(m, u2, &si);

u3 = hashmap_get(m->watch_pids2, PID_TO_PTR(si.si_pid));

if (u3 && u3 != u2 && u3 != u1)

invoke_sigchld_event(m, u3, &si);

}

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

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

if (errno == EINTR)

continue;

return -errno;

}

}

return 0;

}

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

_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;

int r;

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

r = manager_add_job_by_name(m, JOB_START, name, mode, true, &error, NULL);

if (r < 0)

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

return r;

}

static int manager_dispatch_signal_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {

Manager *m = userdata;

ssize_t n;

struct signalfd_siginfo sfsi;

bool sigchld = false;

int r;

assert(m);

assert(m->signal_fd == fd);

if (revents != EPOLLIN) {

log_warning("Got unexpected events from signal file descriptor.");

return 0;

}

for (;;) {

n = read(m->signal_fd, &sfsi, sizeof(sfsi));

if (n != sizeof(sfsi)) {

if (n >= 0)

return -EIO;

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

break;

return -errno;

}

log_received_signal(sfsi.ssi_signo == SIGCHLD ||

(sfsi.ssi_signo == SIGTERM && m->running_as == MANAGER_USER)

? LOG_DEBUG : LOG_INFO,

&sfsi);

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) {

/* If the user presses C-A-D more than

if (ratelimit_test(&m->ctrl_alt_del_ratelimit))

manager_start_target(m, SPECIAL_CTRL_ALT_DEL_TARGET, JOB_REPLACE_IRREVERSIBLY);

else {

log_notice("Ctrl-Alt-Del was pressed more than 7 times within 2s, rebooting immediately.");

status_printf(NULL, true, false, "Ctrl-Alt-Del was pressed more than 7 times within 2s, rebooting immediately.");

m->exit_code = MANAGER_REBOOT;

}

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: {

_cleanup_free_ char *dump = NULL;

_cleanup_fclose_ FILE *f = NULL;

size_t size;

f = open_memstream(&dump, &size);

if (!f) {

log_warning_errno(errno, "Failed to allocate memory stream: %m");

break;

}

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

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

r = fflush_and_check(f);

if (r < 0) {

log_warning_errno(r, "Failed to write status stream: %m");

break;

}

log_dump(LOG_INFO, 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, SHOW_STATUS_YES);

break;

case 21:

log_debug("Disabling showing of status.");

manager_set_show_status(m, SHOW_STATUS_NO);

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 24:

if (m->running_as == MANAGER_USER) {

m->exit_code = MANAGER_EXIT;

return 0;

}

/* This is a nop on init */

break;

case 26:

case 29: /* compatibility: used to be mapped to LOG_TARGET_SYSLOG_OR_KMSG */

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;

default:

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

}

}

}

}

if (sigchld)

manager_dispatch_sigchld(m);

return 0;

}

static int manager_dispatch_time_change_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {

Manager *m = userdata;

Iterator i;

Unit *u;

assert(m);

assert(m->time_change_fd == fd);

log_struct(LOG_INFO,

LOG_MESSAGE_ID(SD_MESSAGE_TIME_CHANGE),

LOG_MESSAGE("Time has been changed"),

NULL);

/* Restart the watch */

m->time_change_event_source = sd_event_source_unref(m->time_change_event_source);

m->time_change_fd = safe_close(m->time_change_fd);

manager_setup_time_change(m);

HASHMAP_FOREACH(u, m->units, i)

if (UNIT_VTABLE(u)->time_change)

UNIT_VTABLE(u)->time_change(u);

return 0;

}

static int manager_dispatch_idle_pipe_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {

Manager *m = userdata;

assert(m);

assert(m->idle_pipe[2] == fd);

m->no_console_output = m->n_on_console > 0;

manager_close_idle_pipe(m);

return 0;

}

static int manager_dispatch_jobs_in_progress(sd_event_source *source, usec_t usec, void *userdata) {

Manager *m = userdata;

int r;

uint64_t next;

assert(m);

assert(source);

manager_print_jobs_in_progress(m);

next = now(CLOCK_MONOTONIC) + JOBS_IN_PROGRESS_PERIOD_USEC;

r = sd_event_source_set_time(source, next);

if (r < 0)

return r;

return sd_event_source_set_enabled(source, SD_EVENT_ONESHOT);

}

int manager_loop(Manager *m) {

int r;

RATELIMIT_DEFINE(rl, 1*USEC_PER_SEC, 50000);

assert(m);

m->exit_code = MANAGER_OK;

/* 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_OK) {

usec_t wait_usec;

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_gc_queue(m) > 0)

continue;

if (manager_dispatch_cleanup_queue(m) > 0)

continue;

if (manager_dispatch_cgroup_queue(m) > 0)

continue;

if (manager_dispatch_dbus_queue(m) > 0)

continue;

/* Sleep for half the watchdog time */

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

wait_usec = m->runtime_watchdog / 2;

if (wait_usec <= 0)

wait_usec = 1;

} else

wait_usec = USEC_INFINITY;

r = sd_event_run(m->event, wait_usec);

if (r < 0)

return log_error_errno(r, "Failed to run event loop: %m");

}

return m->exit_code;

}

int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u) {

_cleanup_free_ char *n = NULL;

Unit *u;

int r;

assert(m);

assert(s);

assert(_u);

r = unit_name_from_dbus_path(s, &n);

if (r < 0)

return r;

r = manager_load_unit(m, n, NULL, e, &u);

if (r < 0)

return r;

*_u = u;

return 0;

}

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

const char *p;

unsigned id;

Job *j;

int r;

assert(m);

assert(s);

assert(_j);

p = startswith(s, "/org/freedesktop/systemd1/job/");

if (!p)

return -EINVAL;

r = safe_atou(p, &id);

if (r < 0)

return r;

j = manager_get_job(m, id);

if (!j)

return -ENOENT;

*_j = j;

return 0;

}

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

#ifdef HAVE_AUDIT

_cleanup_free_ char *p = NULL;

const char *msg;

int audit_fd, r;

audit_fd = get_audit_fd();

if (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;

r = unit_name_to_prefix_and_instance(u->id, &p);

if (r < 0) {

log_error_errno(r, "Failed to extract prefix and instance of unit name: %m");

return;

}

msg = strjoina("unit=", p);

if (audit_log_user_comm_message(audit_fd, type, msg, "systemd", NULL, NULL, NULL, success) < 0) {

if (errno == EPERM)

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

close_audit_fd();

else

log_warning_errno(errno, "Failed to send audit message: %m");

}

#endif

}

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

union sockaddr_union sa = PLYMOUTH_SOCKET;

int n = 0;

_cleanup_free_ char *message = NULL;

_cleanup_close_ int fd = -1;

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

if (m->n_reloading > 0)

return;

if (m->running_as != MANAGER_SYSTEM)

return;

if (detect_container() > 0)

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

fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);

if (fd < 0) {

log_error_errno(errno, "socket() failed: %m");

return;

}

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

if (!IN_SET(errno, EPIPE, EAGAIN, ENOENT, ECONNREFUSED, ECONNRESET, ECONNABORTED))

log_error_errno(errno, "connect() failed: %m");

return;

}

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

log_oom();

return;

}

errno = 0;

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

if (!IN_SET(errno, EPIPE, EAGAIN, ENOENT, ECONNREFUSED, ECONNRESET, ECONNABORTED))

log_error_errno(errno, "Failed to write Plymouth message: %m");

}

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

const char *path;

int fd = -1;

FILE *f;

assert(_f);

path = m->running_as == MANAGER_SYSTEM ? "/run/systemd" : "/tmp";

fd = open_tmpfile(path, O_RDWR|O_CLOEXEC);

if (fd < 0)

return -errno;

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

f = fdopen(fd, "w+");

if (!f) {

safe_close(fd);

return -errno;

}

*_f = f;

return 0;

}

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

Iterator i;

Unit *u;

const char *t;

char **e;

int r;

assert(m);

assert(f);

assert(fds);

m->n_reloading ++;

fprintf(f, "current-job-id=%"PRIu32"\n", m->current_job_id);

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

fprintf(f, "n-installed-jobs=%u\n", m->n_installed_jobs);

fprintf(f, "n-failed-jobs=%u\n", m->n_failed_jobs);

dual_timestamp_serialize(f, "firmware-timestamp", &m->firmware_timestamp);

dual_timestamp_serialize(f, "loader-timestamp", &m->loader_timestamp);

dual_timestamp_serialize(f, "kernel-timestamp", &m->kernel_timestamp);

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

if (!in_initrd()) {

dual_timestamp_serialize(f, "userspace-timestamp", &m->userspace_timestamp);

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

dual_timestamp_serialize(f, "security-start-timestamp", &m->security_start_timestamp);

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

dual_timestamp_serialize(f, "generators-start-timestamp", &m->generators_start_timestamp);

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

dual_timestamp_serialize(f, "units-load-start-timestamp", &m->units_load_start_timestamp);

dual_timestamp_serialize(f, "units-load-finish-timestamp", &m->units_load_finish_timestamp);

}

if (!switching_root) {

STRV_FOREACH(e, m->environment) {

_cleanup_free_ char *ce;

ce = cescape(*e);

if (!ce)

return -ENOMEM;

fprintf(f, "env=%s\n", *e);

}

}

if (m->notify_fd >= 0) {

int copy;

copy = fdset_put_dup(fds, m->notify_fd);

if (copy < 0)

return copy;

fprintf(f, "notify-fd=%i\n", copy);

fprintf(f, "notify-socket=%s\n", m->notify_socket);

}

if (m->kdbus_fd >= 0) {

int copy;

copy = fdset_put_dup(fds, m->kdbus_fd);

if (copy < 0)

return copy;

fprintf(f, "kdbus-fd=%i\n", copy);

}

bus_track_serialize(m->subscribed, f);

fputc('\n', f);

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

if (u->id != t)

continue;

/* Start marker */

fputs(u->id, f);

fputc('\n', f);

r = unit_serialize(u, f, fds, !switching_root);

if (r < 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, "n-installed-jobs=")) {

uint32_t n;

if (safe_atou32(l+17, &n) < 0)

log_debug("Failed to parse installed jobs counter %s", l+17);

else

m->n_installed_jobs += n;

} else if (startswith(l, "n-failed-jobs=")) {

uint32_t n;

if (safe_atou32(l+14, &n) < 0)

log_debug("Failed to parse failed jobs counter %s", l+14);

else

m->n_failed_jobs += n;

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

int b;

b = parse_boolean(l+10);

if (b < 0)

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

else

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

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

dual_timestamp_deserialize(l+19, &m->firmware_timestamp);

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

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

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

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

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

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

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

dual_timestamp_deserialize(l+20, &m->userspace_timestamp);

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

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

else if (startswith(l, "security-start-timestamp="))

dual_timestamp_deserialize(l+25, &m->security_start_timestamp);

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

dual_timestamp_deserialize(l+26, &m->security_finish_timestamp);

else if (startswith(l, "generators-start-timestamp="))

dual_timestamp_deserialize(l+27, &m->generators_start_timestamp);

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

dual_timestamp_deserialize(l+28, &m->generators_finish_timestamp);

else if (startswith(l, "units-load-start-timestamp="))

dual_timestamp_deserialize(l+27, &m->units_load_start_timestamp);

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

dual_timestamp_deserialize(l+28, &m->units_load_finish_timestamp);

else if (startswith(l, "env=")) {

_cleanup_free_ char *uce = NULL;

char **e;

r = cunescape(l + 4, UNESCAPE_RELAX, &uce);

if (r < 0)

goto finish;

e = strv_env_set(m->environment, uce);

if (!e) {

r = -ENOMEM;

goto finish;

}

strv_free(m->environment);

m->environment = e;

} else if (startswith(l, "notify-fd=")) {

int fd;

if (safe_atoi(l + 10, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))

log_debug("Failed to parse notify fd: %s", l + 10);

else {

m->notify_event_source = sd_event_source_unref(m->notify_event_source);

safe_close(m->notify_fd);

m->notify_fd = fdset_remove(fds, fd);

}

} else if (startswith(l, "notify-socket=")) {

char *n;

n = strdup(l+14);

if (!n) {

r = -ENOMEM;

goto finish;

}

free(m->notify_socket);

m->notify_socket = n;

} else if (startswith(l, "kdbus-fd=")) {

int fd;

if (safe_atoi(l + 9, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))

log_debug("Failed to parse kdbus fd: %s", l + 9);

else {

safe_close(m->kdbus_fd);

m->kdbus_fd = fdset_remove(fds, fd);

}

} else {

int k;

k = bus_track_deserialize_item(&m->deserialized_subscribed, l);

if (k < 0)

log_debug_errno(k, "Failed to deserialize bus tracker object: %m");

else if (k == 0)

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);

r = manager_load_unit(m, strstrip(name), NULL, NULL, &u);

if (r < 0)

goto finish;

r = unit_deserialize(u, f, fds);

if (r < 0)

goto finish;

}

finish:

if (ferror(f))

r = -EIO;

assert(m->n_reloading > 0);

m->n_reloading --;

return r;

}

int manager_reload(Manager *m) {

int r, q;

_cleanup_fclose_ FILE *f = NULL;

_cleanup_fdset_free_ FDSet *fds = NULL;

assert(m);

r = manager_open_serialization(m, &f);

if (r < 0)

return r;

m->n_reloading ++;

bus_manager_send_reloading(m, true);

fds = fdset_new();

if (!fds) {

m->n_reloading --;

return -ENOMEM;

}

r = manager_serialize(m, f, fds, false);

if (r < 0) {

m->n_reloading --;

return r;

}

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

m->n_reloading --;

return -errno;

}

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

manager_clear_jobs_and_units(m);

manager_undo_generators(m);

lookup_paths_free(&m->lookup_paths);

/* Find new unit paths */

q = manager_run_generators(m);

if (q < 0 && r >= 0)

r = q;

q = lookup_paths_init(

&m->lookup_paths, m->running_as, true,

NULL,

m->generator_unit_path,

m->generator_unit_path_early,

m->generator_unit_path_late);

if (q < 0 && r >= 0)

r = q;

manager_build_unit_path_cache(m);

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

q = manager_enumerate(m);

if (q < 0 && r >= 0)

r = q;

/* Second, deserialize our stored data */

q = manager_deserialize(m, f, fds);

if (q < 0 && r >= 0)

r = q;

fclose(f);

f = NULL;

/* Re-register notify_fd as event source */

q = manager_setup_notify(m);

if (q < 0 && r >= 0)

r = q;

/* Third, fire things up! */

manager_coldplug(m);

assert(m->n_reloading > 0);

m->n_reloading--;

m->send_reloading_done = true;

return r;

}

bool manager_is_reloading_or_reexecuting(Manager *m) {

assert(m);

return m->n_reloading != 0;

}

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_inactive_or_pending(Manager *m, const char *name) {

Unit *u;

assert(m);

assert(name);

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

u = manager_get_unit(m, name);

if (!u)

return true;

return unit_inactive_or_pending(u);

}

static void manager_notify_finished(Manager *m) {

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

usec_t firmware_usec, loader_usec, kernel_usec, initrd_usec, userspace_usec, total_usec;

if (m->test_run)

return;

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

/* Note that m->kernel_usec.monotonic is always at 0,

firmware_usec = m->firmware_timestamp.monotonic - m->loader_timestamp.monotonic;

loader_usec = m->loader_timestamp.monotonic - m->kernel_timestamp.monotonic;

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

total_usec = m->firmware_timestamp.monotonic + m->finish_timestamp.monotonic;

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

kernel_usec = m->initrd_timestamp.monotonic - m->kernel_timestamp.monotonic;

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

log_struct(LOG_INFO,

LOG_MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),

"KERNEL_USEC="USEC_FMT, kernel_usec,

"INITRD_USEC="USEC_FMT, initrd_usec,

"USERSPACE_USEC="USEC_FMT, userspace_usec,

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

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

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

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

format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC)),

NULL);

} else {

kernel_usec = m->userspace_timestamp.monotonic - m->kernel_timestamp.monotonic;

initrd_usec = 0;

log_struct(LOG_INFO,

LOG_MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),

"KERNEL_USEC="USEC_FMT, kernel_usec,

"USERSPACE_USEC="USEC_FMT, userspace_usec,

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

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

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

format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC)),

NULL);

}

} else {

firmware_usec = loader_usec = initrd_usec = kernel_usec = 0;

total_usec = userspace_usec = m->finish_timestamp.monotonic - m->userspace_timestamp.monotonic;

log_struct(LOG_INFO,

LOG_MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),

"USERSPACE_USEC="USEC_FMT, userspace_usec,

LOG_MESSAGE("Startup finished in %s.",

format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC)),

NULL);

}

bus_manager_send_finished(m, firmware_usec, loader_usec, kernel_usec, initrd_usec, userspace_usec, total_usec);

sd_notifyf(false,

"READY=1\n"

"STATUS=Startup finished in %s.",

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

}

void manager_check_finished(Manager *m) {

assert(m);

if (m->n_reloading > 0)

return;

/* Verify that we are actually running currently. Initially

if (m->exit_code != MANAGER_OK)

return;

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

if (m->jobs_in_progress_event_source)

/* Ignore any failure, this is only for feedback */

(void) sd_event_source_set_time(m->jobs_in_progress_event_source, now(CLOCK_MONOTONIC) + JOBS_IN_PROGRESS_WAIT_USEC);

return;

}

manager_flip_auto_status(m, false);

/* Notify Type=idle units that we are done now */

manager_close_idle_pipe(m);

/* Turn off confirm spawn now */

m->confirm_spawn = false;

/* No need to update ask password status when we're going non-interactive */

manager_close_ask_password(m);

/* This is no longer the first boot */

manager_set_first_boot(m, false);

if (dual_timestamp_is_set(&m->finish_timestamp))

return;

dual_timestamp_get(&m->finish_timestamp);

manager_notify_finished(m);

manager_invalidate_startup_units(m);

}

static int create_generator_dir(Manager *m, char **generator, const char *name) {

char *p;

int r;

assert(m);

assert(generator);

assert(name);

if (*generator)

return 0;

if (m->running_as == MANAGER_SYSTEM && getpid() == 1) {

/* systemd --system, not running --test */

p = strappend("/run/systemd/", name);

if (!p)

return log_oom();

r = mkdir_p_label(p, 0755);

if (r < 0) {

log_error_errno(r, "Failed to create generator directory %s: %m", p);

free(p);

return r;

}

} else if (m->running_as == MANAGER_USER) {

const char *s = NULL;

s = getenv("XDG_RUNTIME_DIR");

if (!s)

return -EINVAL;

p = strjoin(s, "/systemd/", name, NULL);

if (!p)

return log_oom();

r = mkdir_p_label(p, 0755);

if (r < 0) {

log_error_errno(r, "Failed to create generator directory %s: %m", p);

free(p);

return r;

}

} else {

/* systemd --system --test */

p = strjoin("/tmp/systemd-", name, ".XXXXXX", NULL);

if (!p)

return log_oom();

if (!mkdtemp(p)) {

log_error_errno(errno, "Failed to create generator directory %s: %m",

p);

free(p);

return -errno;

}

}

*generator = p;

return 0;

}

static void trim_generator_dir(Manager *m, char **generator) {

assert(m);

assert(generator);

if (!*generator)

return;

if (rmdir(*generator) >= 0)

*generator = mfree(*generator);

return;

}

static int manager_run_generators(Manager *m) {

_cleanup_strv_free_ char **paths = NULL;

const char *argv[5];

char **path;

int r;

assert(m);

if (m->test_run)

return 0;

paths = generator_paths(m->running_as);

if (!paths)

return log_oom();

/* Optimize by skipping the whole process by not creating output directories

STRV_FOREACH(path, paths) {

r = access(*path, F_OK);

if (r == 0)

goto found;

if (errno != ENOENT)

log_warning_errno(errno, "Failed to open generator directory %s: %m", *path);

}

return 0;

found:

r = create_generator_dir(m, &m->generator_unit_path, "generator");

if (r < 0)

goto finish;

r = create_generator_dir(m, &m->generator_unit_path_early, "generator.early");

if (r < 0)

goto finish;

r = create_generator_dir(m, &m->generator_unit_path_late, "generator.late");

if (r < 0)

goto finish;

argv[0] = NULL; /* Leave this empty, execute_directory() will fill something in */

argv[1] = m->generator_unit_path;

argv[2] = m->generator_unit_path_early;

argv[3] = m->generator_unit_path_late;

argv[4] = NULL;

RUN_WITH_UMASK(0022)

execute_directories((const char* const*) paths, DEFAULT_TIMEOUT_USEC, (char**) argv);

finish:

trim_generator_dir(m, &m->generator_unit_path);

trim_generator_dir(m, &m->generator_unit_path_early);

trim_generator_dir(m, &m->generator_unit_path_late);

return r;

}

static void remove_generator_dir(Manager *m, char **generator) {

assert(m);

assert(generator);

if (!*generator)

return;

strv_remove(m->lookup_paths.unit_path, *generator);

(void) rm_rf(*generator, REMOVE_ROOT);

*generator = mfree(*generator);

}

static void manager_undo_generators(Manager *m) {

assert(m);

remove_generator_dir(m, &m->generator_unit_path);

remove_generator_dir(m, &m->generator_unit_path_early);

remove_generator_dir(m, &m->generator_unit_path_late);

}

int manager_environment_add(Manager *m, char **minus, char **plus) {

char **a = NULL, **b = NULL, **l;

assert(m);

l = m->environment;

if (!strv_isempty(minus)) {

a = strv_env_delete(l, 1, minus);

if (!a)

return -ENOMEM;

l = a;

}

if (!strv_isempty(plus)) {

b = strv_env_merge(2, l, plus);

if (!b) {

strv_free(a);

return -ENOMEM;

}

l = b;

}

if (m->environment != l)

strv_free(m->environment);

if (a != l)

strv_free(a);

if (b != l)

strv_free(b);

m->environment = l;

manager_clean_environment(m);

strv_sort(m->environment);

return 0;

}

int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit) {

int i;

assert(m);

for (i = 0; i < _RLIMIT_MAX; i++) {

if (!default_rlimit[i])

continue;

m->rlimit[i] = newdup(struct rlimit, default_rlimit[i], 1);

if (!m->rlimit[i])

return -ENOMEM;

}

return 0;

}

void manager_recheck_journal(Manager *m) {

Unit *u;

assert(m);

if (m->running_as != MANAGER_SYSTEM)

return;

u = manager_get_unit(m, SPECIAL_JOURNALD_SOCKET);

if (u && SOCKET(u)->state != SOCKET_RUNNING) {

log_close_journal();

return;

}

u = manager_get_unit(m, SPECIAL_JOURNALD_SERVICE);

if (u && SERVICE(u)->state != SERVICE_RUNNING) {

log_close_journal();

return;

}

/* Hmm, OK, so the socket is fully up and the service is up

log_open();

}

void manager_set_show_status(Manager *m, ShowStatus mode) {

assert(m);

assert(IN_SET(mode, SHOW_STATUS_AUTO, SHOW_STATUS_NO, SHOW_STATUS_YES, SHOW_STATUS_TEMPORARY));

if (m->running_as != MANAGER_SYSTEM)

return;

m->show_status = mode;

if (mode > 0)

touch("/run/systemd/show-status");

else

unlink("/run/systemd/show-status");

}

static bool manager_get_show_status(Manager *m, StatusType type) {

assert(m);

if (m->running_as != MANAGER_SYSTEM)

return false;

if (m->no_console_output)

return false;

if (!IN_SET(manager_state(m), MANAGER_INITIALIZING, MANAGER_STARTING, MANAGER_STOPPING))

return false;

/* If we cannot find out the status properly, just proceed. */

if (type != STATUS_TYPE_EMERGENCY && manager_check_ask_password(m) > 0)

return false;

if (m->show_status > 0)

return true;

return false;

}

void manager_set_first_boot(Manager *m, bool b) {

assert(m);

if (m->running_as != MANAGER_SYSTEM)

return;

if (m->first_boot != (int) b) {

if (b)

(void) touch("/run/systemd/first-boot");

else

(void) unlink("/run/systemd/first-boot");

}

m->first_boot = b;

}

void manager_status_printf(Manager *m, StatusType type, const char *status, const char *format, ...) {

va_list ap;

/* If m is NULL, assume we're after shutdown and let the messages through. */

if (m && !manager_get_show_status(m, type))

return;

/* XXX We should totally drop the check for ephemeral here

if (type == STATUS_TYPE_EPHEMERAL && m && m->n_on_console > 0)

return;

va_start(ap, format);

status_vprintf(status, true, type == STATUS_TYPE_EPHEMERAL, format, ap);

va_end(ap);

}

int manager_get_unit_by_path(Manager *m, const char *path, const char *suffix, Unit **_found) {