X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Flogin%2Flogind.c;h=b976981006a77e8fe2ce1882269ee3e1e66326a9;hp=23f4059931d456f192112f3e3e9a8ef6a457bf61;hb=da22b4dccb157393d36cfce6656ddbd9f224f5e3;hpb=34c7fcb14d705141c71b5b63a2f044a51ffbd92b diff --git a/src/login/logind.c b/src/login/logind.c index 23f405993..b97698100 100644 --- a/src/login/logind.c +++ b/src/login/logind.c @@ -1,5 +1,3 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - /*** This file is part of systemd. @@ -20,43 +18,46 @@ ***/ #include -#include #include #include #include +#if 0 /// elogind needs the systems udev header +#include "libudev.h" +#else +#include +#endif // 0 #include "sd-daemon.h" -#include "strv.h" -#include "conf-parser.h" -#include "bus-util.h" + +#include "alloc-util.h" #include "bus-error.h" +#include "bus-util.h" +#include "conf-parser.h" +#include "def.h" +#include "dirent-util.h" +#include "fd-util.h" +#include "formats-util.h" #include "logind.h" +#include "selinux-util.h" +#include "signal-util.h" +#include "strv.h" #include "udev-util.h" -#include "formats-util.h" -#include "label.h" + +/// additional includes elogind needs +#include "cgroup.h" // From src/core/ #include "label.h" -#include "cgroup.h" -#include "mount-setup.h" -#include "virt.h" +#include "mount-setup.h" // From src/core +#include "musl_missing.h" static void manager_free(Manager *m); -static Manager *manager_new(void) { - Manager *m; - int r; +static void manager_reset_config(Manager *m) { - m = new0(Manager, 1); - if (!m) - return NULL; - - m->pin_cgroupfs_fd = -1; - - m->console_active_fd = -1; - -/// elogind does not support autospawning of vts -#if 0 - m->reserve_vt_fd = -1; +#ifdef ENABLE_DEBUG_ELOGIND + int dbg_cnt; +#endif // ENABLE_DEBUG_ELOGIND +#if 0 /// elogind does not support autospawning of vts m->n_autovts = 6; m->reserve_vt = 6; #endif // 0 @@ -67,14 +68,81 @@ static Manager *manager_new(void) { m->handle_hibernate_key = HANDLE_HIBERNATE; m->handle_lid_switch = HANDLE_SUSPEND; m->handle_lid_switch_docked = HANDLE_IGNORE; + m->power_key_ignore_inhibited = false; + m->suspend_key_ignore_inhibited = false; + m->hibernate_key_ignore_inhibited = false; m->lid_switch_ignore_inhibited = true; + m->holdoff_timeout_usec = 30 * USEC_PER_SEC; m->idle_action_usec = 30 * USEC_PER_MINUTE; m->idle_action = HANDLE_IGNORE; - m->idle_action_not_before_usec = now(CLOCK_MONOTONIC); - m->runtime_dir_size = PAGE_ALIGN((size_t) (physical_memory() / 10)); /* 10% */ + m->runtime_dir_size = physical_memory_scale(10U, 100U); /* 10% */ + m->user_tasks_max = system_tasks_max_scale(33U, 100U); /* 33% */ + m->sessions_max = 8192; + m->inhibitors_max = 8192; + + m->kill_user_processes = KILL_USER_PROCESSES; + + m->kill_only_users = strv_free(m->kill_only_users); + m->kill_exclude_users = strv_free(m->kill_exclude_users); + + /* Set default Sleep config if not already set by logind.conf */ + if (!m->suspend_state) + m->suspend_state = strv_new("mem", "standby", "freeze", NULL); + if (!m->hibernate_mode) + m->hibernate_mode = strv_new("platform", "shutdown", NULL); + if (!m->hibernate_state) + m->hibernate_state = strv_new("disk", NULL); + if (!m->hybrid_sleep_mode) + m->hybrid_sleep_mode = strv_new("suspend", "platform", "shutdown", NULL); + if (!m->hybrid_sleep_state) + m->hybrid_sleep_state = strv_new("disk", NULL); + +#ifdef ENABLE_DEBUG_ELOGIND + dbg_cnt = -1; + while (m->suspend_mode && m->suspend_mode[++dbg_cnt]) + log_debug_elogind("suspend_mode[%d] = %s", + dbg_cnt, m->suspend_mode[dbg_cnt]); + dbg_cnt = -1; + while (m->suspend_state[++dbg_cnt]) + log_debug_elogind("suspend_state[%d] = %s", + dbg_cnt, m->suspend_state[dbg_cnt]); + dbg_cnt = -1; + while (m->hibernate_mode[++dbg_cnt]) + log_debug_elogind("hibernate_mode[%d] = %s", + dbg_cnt, m->hibernate_mode[dbg_cnt]); + dbg_cnt = -1; + while (m->hibernate_state[++dbg_cnt]) + log_debug_elogind("hibernate_state[%d] = %s", + dbg_cnt, m->hibernate_state[dbg_cnt]); + dbg_cnt = -1; + while (m->hybrid_sleep_mode[++dbg_cnt]) + log_debug_elogind("hybrid_sleep_mode[%d] = %s", + dbg_cnt, m->hybrid_sleep_mode[dbg_cnt]); + dbg_cnt = -1; + while (m->hybrid_sleep_state[++dbg_cnt]) + log_debug_elogind("hybrid_sleep_state[%d] = %s", + dbg_cnt, m->hybrid_sleep_state[dbg_cnt]); +#endif // ENABLE_DEBUG_ELOGIND +} + +static Manager *manager_new(void) { + Manager *m; + int r; + + m = new0(Manager, 1); + if (!m) + return NULL; + + m->pin_cgroupfs_fd = -1; + m->console_active_fd = -1; +#if 0 /// UNNEEDED by elogind + m->reserve_vt_fd = -1; +#endif // 0 + + m->idle_action_not_before_usec = now(CLOCK_MONOTONIC); m->devices = hashmap_new(&string_hash_ops); m->seats = hashmap_new(&string_hash_ops); @@ -86,18 +154,13 @@ static Manager *manager_new(void) { m->user_units = hashmap_new(&string_hash_ops); m->session_units = hashmap_new(&string_hash_ops); - m->running_as = MANAGER_SYSTEM; m->test_run = false; if (!m->devices || !m->seats || !m->sessions || !m->users || !m->inhibitors || !m->buttons || !m->user_units || !m->session_units) goto fail; - m->kill_exclude_users = strv_new("root", NULL); - if (!m->kill_exclude_users) - goto fail; - /* If elogind should be its own controller, mount its cgroup */ - if (streq(ELOGIND_CGROUP_CONTROLLER, "name=elogind")) { + if (streq(SYSTEMD_CGROUP_CONTROLLER, "name=elogind")) { r = mount_setup(true); if (r < 0) goto fail; @@ -108,22 +171,12 @@ static Manager *manager_new(void) { if (r < 0) goto fail; - m->suspend_mode = NULL; - m->suspend_state = strv_new("mem", "standby", "freeze", NULL); - if (!m->suspend_state) - goto fail; - m->hibernate_mode = strv_new("platform", "shutdown", NULL); - if (!m->hibernate_mode) - goto fail; - m->hibernate_state = strv_new("disk", NULL); - if (!m->hibernate_state) - goto fail; - m->hybrid_sleep_mode = strv_new("suspend", "platform", "shutdown", NULL); - if (!m->hybrid_sleep_mode) - goto fail; - m->hybrid_sleep_state = strv_new("disk", NULL); - if (!m->hybrid_sleep_state) - goto fail; + m->suspend_mode = NULL; + m->suspend_state = NULL; + m->hibernate_mode = NULL; + m->hibernate_state = NULL; + m->hybrid_sleep_mode = NULL; + m->hybrid_sleep_state = NULL; m->udev = udev_new(); if (!m->udev) @@ -135,6 +188,8 @@ static Manager *manager_new(void) { sd_event_set_watchdog(m->event, true); + manager_reset_config(m); + return m; fail: @@ -195,32 +250,25 @@ static void manager_free(Manager *m) { safe_close(m->console_active_fd); - udev_monitor_unref(m->udev_seat_monitor); - udev_monitor_unref(m->udev_device_monitor); - udev_monitor_unref(m->udev_vcsa_monitor); - udev_monitor_unref(m->udev_button_monitor); + udev_monitor_unref(m->udev_seat_monitor); + udev_monitor_unref(m->udev_device_monitor); + udev_monitor_unref(m->udev_vcsa_monitor); + udev_monitor_unref(m->udev_button_monitor); - udev_unref(m->udev); + udev_unref(m->udev); if (m->unlink_nologin) - unlink("/run/nologin"); + (void) unlink("/run/nologin"); bus_verify_polkit_async_registry_free(m->polkit_registry); sd_bus_unref(m->bus); sd_event_unref(m->event); -/// elogind does not support autospawning of vts -#if 0 +#if 0 /// elogind does not support autospawning of vts safe_close(m->reserve_vt_fd); #endif // 0 - /* Avoid the creation of new processes forked by the - * kernel; at this point, we will not listen to the - * signals anyway */ - if (detect_container(NULL) <= 0) - (void) cg_uninstall_release_agent(ELOGIND_CGROUP_CONTROLLER); - manager_shutdown_cgroup(m, true); strv_free(m->kill_only_users); @@ -237,6 +285,9 @@ static void manager_free(Manager *m) { strv_free(m->hybrid_sleep_mode); strv_free(m->hybrid_sleep_state); +#if 0 /// UNNEEDED by elogind + free(m->action_job); +#endif // 0 free(m); } @@ -352,8 +403,7 @@ static int manager_enumerate_seats(Manager *m) { if (errno == ENOENT) return 0; - log_error_errno(errno, "Failed to open /run/systemd/seats: %m"); - return -errno; + return log_error_errno(errno, "Failed to open /run/systemd/seats: %m"); } FOREACH_DIRENT(de, d, return -errno) { @@ -389,8 +439,7 @@ static int manager_enumerate_linger_users(Manager *m) { if (errno == ENOENT) return 0; - log_error_errno(errno, "Failed to open /var/lib/systemd/linger/: %m"); - return -errno; + return log_error_errno(errno, "Failed to open /var/lib/systemd/linger/: %m"); } FOREACH_DIRENT(de, d, return -errno) { @@ -425,8 +474,7 @@ static int manager_enumerate_users(Manager *m) { if (errno == ENOENT) return 0; - log_error_errno(errno, "Failed to open /run/systemd/users: %m"); - return -errno; + return log_error_errno(errno, "Failed to open /run/systemd/users: %m"); } FOREACH_DIRENT(de, d, return -errno) { @@ -466,8 +514,7 @@ static int manager_enumerate_sessions(Manager *m) { if (errno == ENOENT) return 0; - log_error_errno(errno, "Failed to open /run/systemd/sessions: %m"); - return -errno; + return log_error_errno(errno, "Failed to open /run/systemd/sessions: %m"); } FOREACH_DIRENT(de, d, return -errno) { @@ -513,8 +560,7 @@ static int manager_enumerate_inhibitors(Manager *m) { if (errno == ENOENT) return 0; - log_error_errno(errno, "Failed to open /run/systemd/inhibit: %m"); - return -errno; + return log_error_errno(errno, "Failed to open /run/systemd/inhibit: %m"); } FOREACH_DIRENT(de, d, return -errno) { @@ -567,8 +613,7 @@ static int manager_dispatch_device_udev(sd_event_source *s, int fd, uint32_t rev return 0; } -/// UNNEEDED by elogind -#if 0 +#if 0 /// UNNEEDED by elogind static int manager_dispatch_vcsa_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) { _cleanup_udev_device_unref_ struct udev_device *d = NULL; Manager *m = userdata; @@ -617,8 +662,7 @@ static int manager_dispatch_console(sd_event_source *s, int fd, uint32_t revents return 0; } -/// UNNEEDED by elogind -#if 0 +#if 0 /// UNNEEDED by elogind static int manager_reserve_vt(Manager *m) { _cleanup_free_ char *p = NULL; @@ -644,14 +688,26 @@ static int manager_reserve_vt(Manager *m) { #endif // 0 static int signal_agent_released(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; Manager *m = userdata; - Session *s; const char *cgroup; + Session *s; + uid_t sender_uid; int r; assert(message); assert(m); + /* only accept org.freedesktop.systemd1.Agent from UID=0 */ + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds); + if (r < 0) + return r; + + r = sd_bus_creds_get_euid(creds, &sender_uid); + if (r < 0 || sender_uid != 0) + return 0; + + /* parse 'cgroup-empty' notification */ r = sd_bus_message_read(message, "s", &cgroup); if (r < 0) { bus_log_parse_error(r); @@ -672,7 +728,7 @@ static int signal_agent_released(sd_bus_message *message, void *userdata, sd_bus } static int manager_connect_bus(Manager *m) { - _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; int r; assert(m); @@ -687,12 +743,14 @@ static int manager_connect_bus(Manager *m) { return log_error_errno(r, "Failed to add manager object vtable: %m"); /* elogind relies on signals from its release agent */ - r = sd_bus_add_match(m->bus, NULL, - "type='signal'," - "interface='org.freedesktop.elogind.Agent'," - "member='Released'," - "path='/org/freedesktop/elogind/agent'", - signal_agent_released, m); + r = sd_bus_add_match( + m->bus, + NULL, + "type='signal'," + "interface='org.freedesktop.elogind.Agent'," + "member='Released'," + "path='/org/freedesktop/elogind/agent'", + signal_agent_released, m); r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/seat", "org.freedesktop.login1.Seat", seat_vtable, seat_object_find, m); if (r < 0) @@ -718,8 +776,7 @@ static int manager_connect_bus(Manager *m) { if (r < 0) return log_error_errno(r, "Failed to add user enumerator: %m"); -/// elogind does not support systemd as PID 1 -#if 0 +#if 0 /// elogind does not support systemd as PID 1 r = sd_bus_add_match(m->bus, NULL, "type='signal'," @@ -729,7 +786,7 @@ static int manager_connect_bus(Manager *m) { "path='/org/freedesktop/systemd1'", match_job_removed, m); if (r < 0) - log_warning_errno(r, "Failed to add match for JobRemoved: %m"); + return log_error_errno(r, "Failed to add match for JobRemoved: %m"); r = sd_bus_add_match(m->bus, NULL, @@ -740,7 +797,7 @@ static int manager_connect_bus(Manager *m) { "path='/org/freedesktop/systemd1'", match_unit_removed, m); if (r < 0) - log_warning_errno(r, "Failed to add match for UnitRemoved: %m"); + return log_error_errno(r, "Failed to add match for UnitRemoved: %m"); r = sd_bus_add_match(m->bus, NULL, @@ -750,7 +807,7 @@ static int manager_connect_bus(Manager *m) { "member='PropertiesChanged'", match_properties_changed, m); if (r < 0) - log_warning_errno(r, "Failed to add match for PropertiesChanged: %m"); + return log_error_errno(r, "Failed to add match for PropertiesChanged: %m"); r = sd_bus_add_match(m->bus, NULL, @@ -761,7 +818,7 @@ static int manager_connect_bus(Manager *m) { "path='/org/freedesktop/systemd1'", match_reloading, m); if (r < 0) - log_warning_errno(r, "Failed to add match for Reloading: %m"); + return log_error_errno(r, "Failed to add match for Reloading: %m"); r = sd_bus_call_method( m->bus, @@ -771,15 +828,17 @@ static int manager_connect_bus(Manager *m) { "Subscribe", &error, NULL, NULL); - if (r < 0) - log_notice("Failed to enable subscription: %s", bus_error_message(&error, r)); + if (r < 0) { + log_error("Failed to enable subscription: %s", bus_error_message(&error, r)); + return r; + } #endif // 0 r = sd_bus_request_name(m->bus, "org.freedesktop.login1", 0); if (r < 0) return log_error_errno(r, "Failed to register name: %m"); - r = sd_bus_attach_event(m->bus, m->event, 0); + r = sd_bus_attach_event(m->bus, m->event, SD_EVENT_PRIORITY_NORMAL); if (r < 0) return log_error_errno(r, "Failed to attach bus to event loop: %m"); @@ -847,8 +906,7 @@ static int manager_connect_console(Manager *m) { if (errno == ENOENT) return 0; - log_error_errno(errno, "Failed to open /sys/class/tty/tty0/active: %m"); - return -errno; + return log_error_errno(errno, "Failed to open /sys/class/tty/tty0/active: %m"); } r = sd_event_add_io(m->event, &m->console_active_event_source, m->console_active_fd, 0, manager_dispatch_console, m); @@ -869,13 +927,8 @@ static int manager_connect_console(Manager *m) { return -EINVAL; } - r = ignore_signals(SIGRTMIN + 1, -1); - if (r < 0) - return log_error_errno(r, "Cannot ignore SIGRTMIN + 1: %m"); - - r = sigprocmask_many(SIG_BLOCK, SIGRTMIN, -1); - if (r < 0) - return log_error_errno(r, "Cannot block SIGRTMIN: %m"); + assert_se(ignore_signals(SIGRTMIN + 1, -1) >= 0); + assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN, -1) >= 0); r = sd_event_add_signal(m->event, NULL, SIGRTMIN, manager_vt_switch, m); if (r < 0) @@ -962,8 +1015,7 @@ static int manager_connect_udev(Manager *m) { } /* Don't bother watching VCSA devices, if nobody cares */ -/// elogind does not support autospawning of vts -#if 0 +#if 0 /// elogind does not support autospawning of vts if (m->n_autovts > 0 && m->console_active_fd >= 0) { m->udev_vcsa_monitor = udev_monitor_new_from_netlink(m->udev, "udev"); @@ -1098,6 +1150,43 @@ static int manager_dispatch_idle_action(sd_event_source *s, uint64_t t, void *us return 0; } +static int manager_parse_config_file(Manager *m) { +#if 0 /// elogind parses its own config file + assert(m); + + return config_parse_many(PKGSYSCONFDIR "/logind.conf", + CONF_PATHS_NULSTR("systemd/logind.conf.d"), + "Login\0", + config_item_perf_lookup, logind_gperf_lookup, + false, m); +#else + const char* logind_conf = getenv("ELOGIND_CONF_FILE"); + + assert(m); + + if (!logind_conf) + logind_conf = PKGSYSCONFDIR "/logind.conf"; + + return config_parse(NULL, logind_conf, NULL, "Login\0Sleep\0", + config_item_perf_lookup, logind_gperf_lookup, + false, false, true, m); +#endif // 0 +} + +static int manager_dispatch_reload_signal(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { + Manager *m = userdata; + int r; + + manager_reset_config(m); + r = manager_parse_config_file(m); + if (r < 0) + log_warning_errno(r, "Failed to parse config file, using defaults: %m"); + else + log_info("Config file reloaded."); + + return 0; +} + static int manager_startup(Manager *m) { int r; Seat *seat; @@ -1109,6 +1198,12 @@ static int manager_startup(Manager *m) { assert(m); + assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGHUP, -1) >= 0); + + r = sd_event_add_signal(m->event, NULL, SIGHUP, manager_dispatch_reload_signal, m); + if (r < 0) + return log_error_errno(r, "Failed to register SIGHUP handler: %m"); + /* Connect to console */ r = manager_connect_console(m); if (r < 0) @@ -1162,8 +1257,7 @@ static int manager_startup(Manager *m) { manager_gc(m, false); /* Reserve the special reserved VT */ -/// elogind does not support autospawning of vts -#if 0 +#if 0 /// elogind does not support autospawning of vts manager_reserve_vt(m); #endif // 0 @@ -1202,38 +1296,18 @@ static int manager_run(Manager *m) { manager_gc(m, true); + r = manager_dispatch_delayed(m, false); + if (r < 0) + return r; + if (r > 0) + continue; + r = sd_event_run(m->event, (uint64_t) -1); if (r < 0) return r; } } -static int manager_parse_config_file(Manager *m) { - const char *unit = NULL, *logind_conf, *sections; - FILE *file = NULL; - bool relaxed = false, allow_include = false, warn = true; - - assert(m); - -/// elogind parses its own config file -#if 0 - return config_parse_many("/etc/systemd/logind.conf", - CONF_DIRS_NULSTR("systemd/logind.conf"), - "Login\0", - config_item_perf_lookup, logind_gperf_lookup, - false, m); -#endif // 0 - - logind_conf = getenv("ELOGIND_CONF_FILE"); - if (!logind_conf) - logind_conf = PKGSYSCONFDIR "/logind.conf"; - sections = "Login\0Sleep\0"; - - return config_parse(unit, logind_conf, file, sections, - config_item_perf_lookup, logind_gperf_lookup, - relaxed, allow_include, warn, m); -} - int main(int argc, char *argv[]) { Manager *m = NULL; int r; @@ -1256,11 +1330,22 @@ int main(int argc, char *argv[]) { goto finish; } + r = mac_selinux_init(); + if (r < 0) { + log_error_errno(r, "Could not initialize labelling: %m"); + goto finish; + } + /* Always create the directories people can create inotify * watches in. Note that some applications might check for the * existence of /run/systemd/seats/ to determine whether * logind is available, so please always make sure this check * stays in. */ +#if 0 /// elogind can not rely on systemd to help, so we need a bit more effort than this + mkdir_label("/run/systemd/seats", 0755); + mkdir_label("/run/systemd/users", 0755); + mkdir_label("/run/systemd/sessions", 0755); +#else r = mkdir_label("/run/systemd", 0755); if ( (r < 0) && (-EEXIST != r) ) return log_error_errno(r, "Failed to create /run/systemd : %m"); @@ -1276,6 +1361,7 @@ int main(int argc, char *argv[]) { r = mkdir_label("/run/systemd/machines", 0755); if ( r < 0 && (-EEXIST != r) ) return log_error_errno(r, "Failed to create /run/systemd/machines : %m"); +#endif // 0 m = manager_new(); if (!m) { @@ -1291,7 +1377,7 @@ int main(int argc, char *argv[]) { goto finish; } - log_debug("logind running as pid "PID_FMT, getpid()); + log_debug("elogind running as pid "PID_FMT, getpid()); sd_notify(false, "READY=1\n" @@ -1299,13 +1385,14 @@ int main(int argc, char *argv[]) { r = manager_run(m); - log_debug("logind stopped as pid "PID_FMT, getpid()); + log_debug("elogind stopped as pid "PID_FMT, getpid()); finish: sd_notify(false, "STOPPING=1\n" "STATUS=Shutting down..."); + if (m) manager_free(m); return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;