diff options
| author | Andy Wingo <wingo@pobox.com> | 2015-04-19 12:58:44 +0200 |
|---|---|---|
| committer | Andy Wingo <wingo@pobox.com> | 2015-04-19 12:58:44 +0200 |
| commit | 9ad77dd132a43bcb42ec391d0f7acee8935bde6c (patch) | |
| tree | 69e8bf0854e20635cf3ed72b0334bbcbb48c401f /src/core/manager.c | |
| parent | f48dd74a8d39b6074f820f904953f5cece03b9b0 (diff) | |
Remove src/core
Diffstat (limited to 'src/core/manager.c')
| -rw-r--r-- | src/core/manager.c | 3155 |
1 files changed, 0 insertions, 3155 deletions
diff --git a/src/core/manager.c b/src/core/manager.c deleted file mode 100644 index 1afd359df2..0000000000 --- a/src/core/manager.c +++ /dev/null @@ -1,3155 +0,0 @@ -/*-*- 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); |