+++ /dev/null
-/*-*- 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 "manager.h"
-#include "transaction.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 "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 "dbus.h"
-#include "dbus-unit.h"
-#include "dbus-job.h"
-#include "dbus-manager.h"
-#include "bus-kernel.h"
-#include "time-util.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;
-
- assert(m);
-
- if (m->jobs_in_progress_event_source)
- return;
-
- next = now(CLOCK_MONOTONIC) + JOBS_IN_PROGRESS_WAIT_USEC;
- (void) sd_event_add_time(
- m->event,
- &m->jobs_in_progress_event_source,
- CLOCK_MONOTONIC,
- next, 0,
- manager_dispatch_jobs_in_progress, m);
-}
-
-#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;
- }
-
- /* 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");
-
- 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");
-
- 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;
-
- /* 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 == SYSTEMD_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 == SYSTEMD_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(SystemdRunningAs running_as, bool test_run, Manager **_m) {
- Manager *m;
- int r;
-
- assert(_m);
- assert(running_as >= 0);
- assert(running_as < _SYSTEMD_RUNNING_AS_MAX);
-
- m = new0(Manager, 1);
- if (!m)
- return -ENOMEM;
-
-#ifdef ENABLE_EFI
- if (running_as == SYSTEMD_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;
-
- 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;
-
- 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 == SYSTEMD_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");
- }
-
- return 0;
-}
-
-static int manager_setup_kdbus(Manager *m) {
-#ifdef ENABLE_KDBUS
- _cleanup_free_ char *p = NULL;
-
- assert(m);
-
- if (m->test_run || m->kdbus_fd >= 0)
- return 0;
-
- if (m->running_as == SYSTEMD_SYSTEM && detect_container(NULL) <= 0)
- bus_kernel_fix_attach_mask();
-
- m->kdbus_fd = bus_kernel_create_bus(
- m->running_as == SYSTEMD_SYSTEM ? "system" : "user",
- m->running_as == SYSTEMD_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);
-#endif
-
- 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 == SYSTEMD_USER && getenv("DBUS_SESSION_BUS_ADDRESS"));
-
- /* Try to connect to the busses, 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->id, "Collecting %s", u->id);
- 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_vtable[c]->supported && !unit_vtable[c]->supported(m)) {
- 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 int manager_coldplug(Manager *m) {
- int r = 0;
- Iterator i;
- Unit *u;
- char *k;
-
- /*
- * Some unit types tend to spawn jobs or check other units' state
- * during coldplug. This is wrong because it is undefined whether the
- * units in question have been already coldplugged (i. e. their state
- * restored). This way, we can easily re-start an already started unit
- * or otherwise make a wrong decision based on the unit's state.
- *
- * Solve this by providing a way for coldplug functions to defer
- * such actions until after all units have been coldplugged.
- *
- * We store Unit* -> int(*)(Unit*).
- *
- * https://bugs.freedesktop.org/show_bug.cgi?id=88401
- */
- _cleanup_hashmap_free_ Hashmap *deferred_work = NULL;
- int(*proc)(Unit*);
-
- assert(m);
-
- deferred_work = hashmap_new(&trivial_hash_ops);
- if (!deferred_work)
- return -ENOMEM;
-
- /* Then, let's set up their initial state. */
- HASHMAP_FOREACH_KEY(u, k, m->units, i) {
- int q;
-
- /* ignore aliases */
- if (u->id != k)
- continue;
-
- q = unit_coldplug(u, deferred_work);
- if (q < 0)
- r = q;
- }
-
- /* After coldplugging and setting up initial state of the units,
- * let's perform operations which spawn jobs or query units' state. */
- HASHMAP_FOREACH_KEY(proc, u, deferred_work, i) {
- int q;
-
- q = proc(u);
- if (q < 0)
- r = q;
- }
-
- return r;
-}
-
-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! */
- q = manager_coldplug(m);
- if (q < 0 && r == 0)
- r = q;
-
- 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->id,
- "Trying to enqueue job %s/%s/%s", unit->id,
- job_type_to_string(type), job_mode_to_string(mode));
-
- 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->id,
- "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, TEMPLATE_INVALID))
- 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;
- }
-
- log_unit_debug(u->id, "Got notification message for unit %s", u->id);
-
- if (UNIT_VTABLE(u)->notify_message)
- UNIT_VTABLE(u)->notify_message(u, pid, tags, fds);
-}
-
-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;
- }
-
- for (cmsg = CMSG_FIRSTHDR(&msghdr); cmsg; cmsg = CMSG_NXTHDR(&msghdr, cmsg)) {
- 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->id, "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_unit_debug(name, "Activating special unit %s", name);
-
- r = manager_add_job_by_name(m, JOB_START, name, mode, true, &error, NULL);
- if (r < 0)
- log_unit_error(name, "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 == SYSTEMD_USER)
- ? LOG_DEBUG : LOG_INFO,
- &sfsi);
-
- switch (sfsi.ssi_signo) {
-
- case SIGCHLD:
- sigchld = true;
- break;
-
- case SIGTERM:
- if (m->running_as == SYSTEMD_SYSTEM) {
- /* This is for compatibility with the
- * original sysvinit */
- m->exit_code = MANAGER_REEXECUTE;
- break;
- }
-
- /* Fall through */
-
- case SIGINT:
- if (m->running_as == SYSTEMD_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 == SYSTEMD_SYSTEM)
- manager_start_target(m, SPECIAL_KBREQUEST_TARGET, JOB_REPLACE);
-
- /* This is a nop on non-init */
- break;
-
- case SIGPWR:
- if (m->running_as == SYSTEMD_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 == SYSTEMD_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 == SYSTEMD_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 == SYSTEMD_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;
-
- 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 != SYSTEMD_SYSTEM)
- return;
-
- if (u->type != UNIT_SERVICE)
- return;
-
- p = unit_name_to_prefix_and_instance(u->id);
- if (!p) {
- log_oom();
- 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 != SYSTEMD_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 == SYSTEMD_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;
-
- uce = cunescape(l+4);
- if (!uce) {
- r = -ENOMEM;
- 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! */
- q = manager_coldplug(m);
- if (q < 0 && r >= 0)
- r = q;
-
- 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 == SYSTEMD_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 (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 == SYSTEMD_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 == SYSTEMD_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_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);
- rm_rf(*generator, false, true, false);
-
- 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 != SYSTEMD_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 != SYSTEMD_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 != SYSTEMD_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 != SYSTEMD_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;
-
- assert(m);
- assert(path);
- assert(suffix);
- assert(_found);
-
- p = unit_name_from_path(path, suffix);
- if (!p)
- return -ENOMEM;
-
- 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 == SYSTEMD_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);
~ianmdlvl / elogind.git / blobdiff