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src.rivoreo.one / systemd-stable / v223 / . / src / core / manager.c
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#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"
/* Initial delay and the interval for printing status messages about running jobs */
#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,
* so the above loop must have succeeded in finding j. */
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
* is treated as unknown status. */
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_inotify_fd = safe_close(m->ask_password_inotify_fd);
m->ask_password_event_source = sd_event_source_unref(m->ask_password_event_source);
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);
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
* timeout to the latest possible value. */
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
* CLOCK_REALTIME makes a jump relative to CLOCK_MONOTONIC */
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
* this will fail with EPERM (older) or EINVAL (newer), so
* ignore that. */
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
* Linux/glibc we have 30 of them (with the exception of Linux
* on hppa, see below), between SIGRTMIN+0 ... SIGRTMIN+30
* (aka SIGRTMAX). */
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
* signals (SIGRTMAX is SIGRTMIN+25 there),
* hence let's not try to make use of them
* here. Since these commands are accessible
* by different means and only really a safety
* net, the missing functionality on hppa
* shouldn't matter. */
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
* later than notify_fd processing, so that the notify
* processing can still figure out to which process/service a
* message belongs, before we reap the process. */
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
* need ourselves to communicate with our clients */
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
* environment for its children. It does not import
* the kernel or the parents exported variables.
*
* The initial passed environ is untouched to keep
* /proc/self/environ valid; it is used for tagging
* the init process inside containers. */
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
* along to its children. */
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(NULL) <= 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->utab_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->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 = set_ensure_allocated(&m->startup_units, NULL);
if (r < 0)
goto fail;
r = set_ensure_allocated(&m->failed_units, NULL);
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
* here. We do that after deserialization, since they might
* have gotten serialized across the reexec. */
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 */
free(m->notify_socket);
m->notify_socket = NULL;
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
* still identify to which service an exit message belongs */
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
* let's investigate it later */
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
* let's mark it for deletion */
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
* around */
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->idle_pipe_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
* that it might know */
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
* we don't always have to go to disk */
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
* this is already known, so we increase the counter here
* already */
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
* useful to allow container managers to pass some file
* descriptors to us pre-initialized. This enables
* socket-based activation of entire containers. */
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
* then let's create the bus now */
q = manager_setup_notify(m);
if (q < 0 && r == 0)
r = q;
/* We might have deserialized the kdbus control fd, but if we
* didn't, then let's create the bus now. */
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
* sent, before we notify that the reload is
* finished */
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
* tries to load its data until the queue is empty */
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
* load anything from disk. */
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
* start any services or anything. */
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
* to avoid notifying the same one multiple times. */
u1 = manager_get_unit_by_pid(m, ucred->pid);
if (u1) {
manager_invoke_notify_message(m, u1, ucred->pid, buf, n, fds);
found = true;
}
u2 = hashmap_get(m->watch_pids1, LONG_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, LONG_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
* zombie. That way we can still access /proc/$PID for
* it while it is a zombie. */
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
* to, it might be multiple... */
u1 = manager_get_unit_by_pid(m, si.si_pid);
if (u1)
invoke_sigchld_event(m, u1, &si);
u2 = hashmap_get(m->watch_pids1, LONG_TO_PTR(si.si_pid));
if (u2 && u2 != u1)
invoke_sigchld_event(m, u2, &si);
u3 = hashmap_get(m->watch_pids2, LONG_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;
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
* original sysvinit */
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
* 7 times within 2s, we reboot
* immediately. */
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("Failed to allocate memory stream.");
break;
}
manager_dump_units(m, f, "\t");
manager_dump_jobs(m, f, "\t");
if (ferror(f)) {
log_warning("Failed to write status stream");
break;
}
if (fflush(f)) {
log_warning("Failed to flush status stream");
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;
m->idle_pipe_event_source = sd_event_source_unref(m->idle_pipe_event_source);
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
* before we were exec()'ed. Let's reap them. */
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
* started and we're just deserializing */
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?
* Then let's not retry again. */
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
* started and we're just deserializing */
if (m->n_reloading > 0)
return;
if (m->running_as != MANAGER_SYSTEM)
return;
if (detect_container(NULL) > 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
* message then wait for plymouth */
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");
}
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);
u = hashmap_get(m->watch_bus, name);
if (!u)
return;
UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner);
}
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(NULL) <= 0) {
/* Note that m->kernel_usec.monotonic is always at 0,
* and m->firmware_usec.monotonic and
* m->loader_usec.monotonic should be considered
* negative values. */
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) {
Unit *u = NULL;
Iterator i;
assert(m);
if (m->n_reloading > 0)
return;
/* Verify that we are actually running currently. Initially
* the exit code is set to invalid, and during operation it is
* then set to MANAGER_OK */
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 */
m->idle_pipe_event_source = sd_event_source_unref(m->idle_pipe_event_source);
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);
SET_FOREACH(u, m->startup_units, i)
if (u->cgroup_path)
cgroup_context_apply(unit_get_cgroup_context(u), unit_get_cgroup_mask(u), u->cgroup_path, manager_state(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) {
free(*generator);
*generator = NULL;
}
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
* if no generators are found. */
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);
free(*generator);
*generator = NULL;
}
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
* too, then let's make use of the thing. */
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;
m->first_boot = b;
if (m->first_boot)
touch("/run/systemd/first-boot");
else
unlink("/run/systemd/first-boot");
}
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
* and thus effectively make 'Type=idle' pointless. */
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) {
_cleanup_free_ char *p = NULL;
Unit *found;
int r;
assert(m);
assert(path);
assert(suffix);
assert(_found);
r = unit_name_from_path(path, suffix, &p);
if (r < 0)
return r;
found = manager_get_unit(m, p);
if (!found) {
*_found = NULL;
return 0;
}
*_found = found;
return 1;
}
Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path) {
char p[strlen(path)+1];
assert(m);
assert(path);
strcpy(p, path);
path_kill_slashes(p);
return hashmap_get(m->units_requiring_mounts_for, streq(p, "/") ? "" : p);
}
const char *manager_get_runtime_prefix(Manager *m) {
assert(m);
return m->running_as == MANAGER_SYSTEM ?
"/run" :
getenv("XDG_RUNTIME_DIR");
}
void manager_update_failed_units(Manager *m, Unit *u, bool failed) {
unsigned size;
assert(m);
assert(u->manager == m);
size = set_size(m->failed_units);
if (failed) {
if (set_put(m->failed_units, u) < 0)
log_oom();
} else
set_remove(m->failed_units, u);
if (set_size(m->failed_units) != size)
bus_manager_send_change_signal(m);
}
ManagerState manager_state(Manager *m) {
Unit *u;
assert(m);
/* Did we ever finish booting? If not then we are still starting up */
if (!dual_timestamp_is_set(&m->finish_timestamp)) {
u = manager_get_unit(m, SPECIAL_BASIC_TARGET);
if (!u || !UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u)))
return MANAGER_INITIALIZING;
return MANAGER_STARTING;
}
/* Is the special shutdown target queued? If so, we are in shutdown state */
u = manager_get_unit(m, SPECIAL_SHUTDOWN_TARGET);
if (u && u->job && IN_SET(u->job->type, JOB_START, JOB_RESTART, JOB_TRY_RESTART, JOB_RELOAD_OR_START))
return MANAGER_STOPPING;
/* Are the rescue or emergency targets active or queued? If so we are in maintenance state */
u = manager_get_unit(m, SPECIAL_RESCUE_TARGET);
if (u && (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)) ||
(u->job && IN_SET(u->job->type, JOB_START, JOB_RESTART, JOB_TRY_RESTART, JOB_RELOAD_OR_START))))
return MANAGER_MAINTENANCE;
u = manager_get_unit(m, SPECIAL_EMERGENCY_TARGET);
if (u && (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)) ||
(u->job && IN_SET(u->job->type, JOB_START, JOB_RESTART, JOB_TRY_RESTART, JOB_RELOAD_OR_START))))
return MANAGER_MAINTENANCE;
/* Are there any failed units? If so, we are in degraded mode */
if (set_size(m->failed_units) > 0)
return MANAGER_DEGRADED;
return MANAGER_RUNNING;
}
static const char *const manager_state_table[_MANAGER_STATE_MAX] = {
[MANAGER_INITIALIZING] = "initializing",
[MANAGER_STARTING] = "starting",
[MANAGER_RUNNING] = "running",
[MANAGER_DEGRADED] = "degraded",
[MANAGER_MAINTENANCE] = "maintenance",
[MANAGER_STOPPING] = "stopping",
};
DEFINE_STRING_TABLE_LOOKUP(manager_state, ManagerState);