X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Flogin%2Flogind.c;h=d46358e31ff392090d4e873d756ed627ac5fe6dd;hp=6cc6218b3de851df3aa715ed6166502a30bbe9f5;hb=d5673993ad3bf38d0aeba8dbd025d6f4527f0169;hpb=1b99ea27bc3ffa1fc6f7cfe89563d891a9aed4c5 diff --git a/src/login/logind.c b/src/login/logind.c index 6cc6218b3..d46358e31 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. @@ -20,36 +18,43 @@ ***/ #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 "format-util.h" #include "logind.h" +#include "selinux-util.h" +#include "signal-util.h" +#include "strv.h" #include "udev-util.h" -#include "formats-util.h" +/// Additional includes needed by elogind +#include "cgroup.h" // From src/core/ +#include "elogind.h" #include "label.h" +#include "musl_missing.h" static void manager_free(Manager *m); -static Manager *manager_new(void) { - Manager *m; - int r; - - m = new0(Manager, 1); - if (!m) - return NULL; - - m->console_active_fd = -1; - m->reserve_vt_fd = -1; - +static void manager_reset_config(Manager *m) { +#if 0 /// elogind does not support autospawning of vts m->n_autovts = 6; m->reserve_vt = 6; +#endif // 0 m->remove_ipc = true; m->inhibit_delay_max = 5 * USEC_PER_SEC; m->handle_power_key = HANDLE_POWEROFF; @@ -57,14 +62,44 @@ 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(DEFAULT_USER_TASKS_MAX_PERCENTAGE, 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); +#if 1 /// elogind needs an Add-On for sleep configuration + elogind_manager_reset_config(m); +#endif // 1 +} + +static Manager *manager_new(void) { + Manager *m; + int r; + + m = new0(Manager, 1); + if (!m) + return NULL; + + 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); @@ -79,10 +114,11 @@ static Manager *manager_new(void) { 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) +#if 1 /// elogind needs some more data + r = elogind_manager_new(m); + if (r < 0) goto fail; - +#endif // 1 m->udev = udev_new(); if (!m->udev) goto fail; @@ -93,6 +129,8 @@ static Manager *manager_new(void) { sd_event_set_watchdog(m->event, true); + manager_reset_config(m); + return m; fail: @@ -108,7 +146,8 @@ static void manager_free(Manager *m) { Inhibitor *i; Button *b; - assert(m); + if (!m) + return; while ((session = hashmap_first(m->sessions))) session_free(session); @@ -153,22 +192,27 @@ 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); +#if 0 /// elogind does not support autospawning of vts safe_close(m->reserve_vt_fd); +#endif // 0 +#if 1 /// elogind has to free its own data + elogind_manager_free(m); +#endif // 1 strv_free(m->kill_only_users); strv_free(m->kill_exclude_users); @@ -176,7 +220,9 @@ static void manager_free(Manager *m) { free(m->scheduled_shutdown_type); free(m->scheduled_shutdown_tty); free(m->wall_message); +#if 0 /// UNNEEDED by elogind free(m->action_job); +#endif // 0 free(m); } @@ -292,8 +338,7 @@ 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) { @@ -329,8 +374,7 @@ 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) { @@ -365,8 +409,7 @@ 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) { @@ -393,10 +436,71 @@ static int manager_enumerate_users(Manager *m) { return r; } +static int manager_attach_fds(Manager *m) { + _cleanup_strv_free_ char **fdnames = NULL; + int n, i, fd; + + /* Upon restart, PID1 will send us back all fds of session devices + * that we previously opened. Each file descriptor is associated + * with a given session. The session ids are passed through FDNAMES. */ + + n = sd_listen_fds_with_names(true, &fdnames); + if (n <= 0) + return n; + + for (i = 0; i < n; i++) { + struct stat st; + SessionDevice *sd; + Session *s; + char *id; + + fd = SD_LISTEN_FDS_START + i; + + id = startswith(fdnames[i], "session-"); + if (!id) + continue; + + s = hashmap_get(m->sessions, id); + if (!s) { + /* If the session doesn't exist anymore, the associated session + * device attached to this fd doesn't either. Let's simply close + * this fd. */ + log_debug("Failed to attach fd for unknown session: %s", id); + close_nointr(fd); + continue; + } + + if (fstat(fd, &st) < 0) { + /* The device is allowed to go away at a random point, in which + * case fstat failing is expected. */ + log_debug_errno(errno, "Failed to stat device fd for session %s: %m", id); + close_nointr(fd); + continue; + } + + sd = hashmap_get(s->devices, &st.st_rdev); + if (!sd) { + /* Weird we got an fd for a session device which wasn't + * recorded in the session state file... */ + log_warning("Got fd for missing session device [%u:%u] in session %s", + major(st.st_rdev), minor(st.st_rdev), s->id); + close_nointr(fd); + continue; + } + + log_debug("Attaching fd to session device [%u:%u] for session %s", + major(st.st_rdev), minor(st.st_rdev), s->id); + + session_device_attach_fd(sd, fd, s->was_active); + } + + return 0; +} + static int manager_enumerate_sessions(Manager *m) { _cleanup_closedir_ DIR *d = NULL; struct dirent *de; - int r = 0; + int r = 0, k; assert(m); @@ -406,13 +510,11 @@ 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) { struct Session *s; - int k; if (!dirent_is_file(de)) continue; @@ -426,7 +528,6 @@ static int manager_enumerate_sessions(Manager *m) { k = manager_add_session(m, de->d_name, &s); if (k < 0) { log_error_errno(k, "Failed to add session by file name %s: %m", de->d_name); - r = k; continue; } @@ -438,6 +539,12 @@ static int manager_enumerate_sessions(Manager *m) { r = k; } + /* We might be restarted and PID1 could have sent us back the + * session device fds we previously saved. */ + k = manager_attach_fds(m); + if (k < 0) + log_warning_errno(k, "Failed to reattach session device fds: %m"); + return r; } @@ -453,8 +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) { @@ -507,6 +613,7 @@ static int manager_dispatch_device_udev(sd_event_source *s, int fd, uint32_t rev return 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; @@ -528,6 +635,7 @@ static int manager_dispatch_vcsa_udev(sd_event_source *s, int fd, uint32_t reven return 0; } +#endif // 0 static int manager_dispatch_button_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) { _cleanup_udev_device_unref_ struct udev_device *d = NULL; @@ -554,6 +662,7 @@ static int manager_dispatch_console(sd_event_source *s, int fd, uint32_t revents return 0; } +#if 0 /// UNNEEDED by elogind static int manager_reserve_vt(Manager *m) { _cleanup_free_ char *p = NULL; @@ -576,9 +685,10 @@ static int manager_reserve_vt(Manager *m) { return 0; } +#endif // 0 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); @@ -616,6 +726,7 @@ static int manager_connect_bus(Manager *m) { if (r < 0) return log_error_errno(r, "Failed to add user enumerator: %m"); +#if 0 /// elogind does not support systemd as PID 1 r = sd_bus_add_match(m->bus, NULL, "type='signal'," @@ -658,7 +769,7 @@ static int manager_connect_bus(Manager *m) { match_reloading, m); if (r < 0) return log_error_errno(r, "Failed to add match for Reloading: %m"); -#if 0 + r = sd_bus_call_method( m->bus, "org.freedesktop.systemd1", @@ -672,15 +783,23 @@ static int manager_connect_bus(Manager *m) { 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"); +#if 0 /// elogind has to setup its release agent return 0; +#else + elogind_bus_setup_system(m); + r = elogind_setup_cgroups_agent(m); + + return r; +#endif // 0 } static int manager_vt_switch(sd_event_source *src, const struct signalfd_siginfo *si, void *data) { @@ -744,8 +863,7 @@ 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); @@ -766,13 +884,8 @@ 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) @@ -859,6 +972,7 @@ static int manager_connect_udev(Manager *m) { } /* Don't bother watching VCSA devices, if nobody cares */ +#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"); @@ -877,6 +991,7 @@ static int manager_connect_udev(Manager *m) { if (r < 0) return r; } +#endif // 0 return 0; } @@ -992,6 +1107,43 @@ 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_nulstr(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; @@ -1003,6 +1155,12 @@ 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) @@ -1056,7 +1214,9 @@ static int manager_startup(Manager *m) { manager_gc(m, false); /* Reserve the special reserved VT */ +#if 0 /// elogind does not support autospawning of vts manager_reserve_vt(m); +#endif // 0 /* And start everything */ HASHMAP_FOREACH(seat, m->seats, i) @@ -1093,29 +1253,30 @@ 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) { - assert(m); - - 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); -} - int main(int argc, char *argv[]) { Manager *m = NULL; int r; + elogind_set_program_name(argv[0]); log_set_target(LOG_TARGET_AUTO); log_set_facility(LOG_AUTH); log_parse_environment(); +#ifdef ENABLE_DEBUG_ELOGIND + log_set_max_level(LOG_DEBUG); + log_set_target(LOG_TARGET_SYSLOG_OR_KMSG); +#endif // ENABLE_DEBUG_ELOGIND log_open(); umask(0022); @@ -1126,14 +1287,38 @@ 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"); + r = mkdir_label("/run/systemd/seats", 0755); + if ( r < 0 && (-EEXIST != r) ) + return log_error_errno(r, "Failed to create /run/systemd/seats : %m"); + r = mkdir_label("/run/systemd/users", 0755); + if ( r < 0 && (-EEXIST != r) ) + return log_error_errno(r, "Failed to create /run/systemd/users : %m"); + r = mkdir_label("/run/systemd/sessions", 0755); + if ( r < 0 && (-EEXIST != r) ) + return log_error_errno(r, "Failed to create /run/systemd/sessions : %m"); + 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) { @@ -1149,7 +1334,7 @@ int main(int argc, char *argv[]) { goto finish; } - log_debug("systemd-logind running as pid "PID_FMT, getpid()); + log_debug("elogind running as pid "PID_FMT, getpid()); sd_notify(false, "READY=1\n" @@ -1157,14 +1342,14 @@ int main(int argc, char *argv[]) { r = manager_run(m); - log_debug("systemd-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..."); - manager_free(m); + manager_free(m); return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }