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Diffstat (limited to '')
| -rw-r--r-- | src/systemctl/systemctl-logind.c | 380 |
1 files changed, 380 insertions, 0 deletions
diff --git a/src/systemctl/systemctl-logind.c b/src/systemctl/systemctl-logind.c new file mode 100644 index 0000000..405f12a --- /dev/null +++ b/src/systemctl/systemctl-logind.c @@ -0,0 +1,380 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <unistd.h> + +#include "sd-login.h" + +#include "bus-error.h" +#include "bus-locator.h" +#include "process-util.h" +#include "systemctl-logind.h" +#include "systemctl-start-unit.h" +#include "systemctl-util.h" +#include "systemctl.h" +#include "terminal-util.h" +#include "user-util.h" + +int logind_set_wall_message(void) { +#if ENABLE_LOGIND + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + sd_bus *bus; + _cleanup_free_ char *m = NULL; + int r; + + r = acquire_bus(BUS_FULL, &bus); + if (r < 0) + return r; + + m = strv_join(arg_wall, " "); + if (!m) + return log_oom(); + + log_debug("%s wall message \"%s\".", arg_dry_run ? "Would set" : "Setting", m); + if (arg_dry_run) + return 0; + + r = bus_call_method(bus, bus_login_mgr, "SetWallMessage", &error, NULL, "sb", m, !arg_no_wall); + if (r < 0) + return log_warning_errno(r, "Failed to set wall message, ignoring: %s", bus_error_message(&error, r)); +#endif + return 0; +} + +/* Ask systemd-logind, which might grant access to unprivileged users through polkit */ +int logind_reboot(enum action a) { +#if ENABLE_LOGIND + static const struct { + const char *method; + const char *description; + } actions[_ACTION_MAX] = { + [ACTION_POWEROFF] = { "PowerOff", "power off system" }, + [ACTION_REBOOT] = { "Reboot", "reboot system" }, + [ACTION_HALT] = { "Halt", "halt system" }, + [ACTION_SUSPEND] = { "Suspend", "suspend system" }, + [ACTION_HIBERNATE] = { "Hibernate", "hibernate system" }, + [ACTION_HYBRID_SLEEP] = { "HybridSleep", "put system into hybrid sleep" }, + [ACTION_SUSPEND_THEN_HIBERNATE] = { "SuspendThenHibernate", "suspend system, hibernate later" }, + }; + + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + sd_bus *bus; + int r; + + if (a < 0 || a >= _ACTION_MAX || !actions[a].method) + return -EINVAL; + + r = acquire_bus(BUS_FULL, &bus); + if (r < 0) + return r; + + polkit_agent_open_maybe(); + (void) logind_set_wall_message(); + + log_debug("%s org.freedesktop.login1.Manager %s dbus call.", arg_dry_run ? "Would execute" : "Executing", actions[a].method); + + if (arg_dry_run) + return 0; + + r = bus_call_method(bus, bus_login_mgr, actions[a].method, &error, NULL, "b", arg_ask_password); + if (r < 0) + return log_error_errno(r, "Failed to %s via logind: %s", actions[a].description, bus_error_message(&error, r)); + + return 0; +#else + return -ENOSYS; +#endif +} + +int logind_check_inhibitors(enum action a) { +#if ENABLE_LOGIND + _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; + _cleanup_strv_free_ char **sessions = NULL; + const char *what, *who, *why, *mode; + uint32_t uid, pid; + sd_bus *bus; + unsigned c = 0; + char **s; + int r; + + if (arg_ignore_inhibitors || arg_force > 0) + return 0; + + if (arg_when > 0) + return 0; + + if (geteuid() == 0) + return 0; + + if (!on_tty()) + return 0; + + if (arg_transport != BUS_TRANSPORT_LOCAL) + return 0; + + r = acquire_bus(BUS_FULL, &bus); + if (r < 0) + return r; + + r = bus_call_method(bus, bus_login_mgr, "ListInhibitors", NULL, &reply, NULL); + if (r < 0) + /* If logind is not around, then there are no inhibitors... */ + return 0; + + r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ssssuu)"); + if (r < 0) + return bus_log_parse_error(r); + + while ((r = sd_bus_message_read(reply, "(ssssuu)", &what, &who, &why, &mode, &uid, &pid)) > 0) { + _cleanup_free_ char *comm = NULL, *user = NULL; + _cleanup_strv_free_ char **sv = NULL; + + if (!streq(mode, "block")) + continue; + + sv = strv_split(what, ":"); + if (!sv) + return log_oom(); + + if (!pid_is_valid((pid_t) pid)) + return log_error_errno(SYNTHETIC_ERRNO(ERANGE), "Invalid PID "PID_FMT".", (pid_t) pid); + + if (!strv_contains(sv, + IN_SET(a, + ACTION_HALT, + ACTION_POWEROFF, + ACTION_REBOOT, + ACTION_KEXEC) ? "shutdown" : "sleep")) + continue; + + (void) get_process_comm(pid, &comm); + user = uid_to_name(uid); + + log_warning("Operation inhibited by \"%s\" (PID "PID_FMT" \"%s\", user %s), reason is \"%s\".", + who, (pid_t) pid, strna(comm), strna(user), why); + + c++; + } + if (r < 0) + return bus_log_parse_error(r); + + r = sd_bus_message_exit_container(reply); + if (r < 0) + return bus_log_parse_error(r); + + /* Check for current sessions */ + sd_get_sessions(&sessions); + STRV_FOREACH(s, sessions) { + _cleanup_free_ char *type = NULL, *tty = NULL, *seat = NULL, *user = NULL, *service = NULL, *class = NULL; + + if (sd_session_get_uid(*s, &uid) < 0 || uid == getuid()) + continue; + + if (sd_session_get_class(*s, &class) < 0 || !streq(class, "user")) + continue; + + if (sd_session_get_type(*s, &type) < 0 || !STR_IN_SET(type, "x11", "wayland", "tty", "mir")) + continue; + + sd_session_get_tty(*s, &tty); + sd_session_get_seat(*s, &seat); + sd_session_get_service(*s, &service); + user = uid_to_name(uid); + + log_warning("User %s is logged in on %s.", strna(user), isempty(tty) ? (isempty(seat) ? strna(service) : seat) : tty); + c++; + } + + if (c <= 0) + return 0; + + return log_error_errno(SYNTHETIC_ERRNO(EPERM), + "Please retry operation after closing inhibitors and logging out other users.\n" + "Alternatively, ignore inhibitors and users with 'systemctl %s -i'.", + action_table[a].verb); +#else + return 0; +#endif +} + +int prepare_firmware_setup(void) { + + if (!arg_firmware_setup) + return 0; + +#if ENABLE_LOGIND + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + sd_bus *bus; + int r; + + r = acquire_bus(BUS_FULL, &bus); + if (r < 0) + return r; + + r = bus_call_method(bus, bus_login_mgr, "SetRebootToFirmwareSetup", &error, NULL, "b", true); + if (r < 0) + return log_error_errno(r, "Cannot indicate to EFI to boot into setup mode: %s", bus_error_message(&error, r)); + + return 0; +#else + return log_error_errno(SYNTHETIC_ERRNO(ENOSYS), + "Booting into firmware setup not supported."); +#endif +} + +int prepare_boot_loader_menu(void) { + + if (arg_boot_loader_menu == USEC_INFINITY) + return 0; + +#if ENABLE_LOGIND + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + sd_bus *bus; + int r; + + r = acquire_bus(BUS_FULL, &bus); + if (r < 0) + return r; + + r = bus_call_method(bus, bus_login_mgr, "SetRebootToBootLoaderMenu", &error, NULL, "t", arg_boot_loader_menu); + if (r < 0) + return log_error_errno(r, "Cannot indicate to boot loader to enter boot loader entry menu: %s", bus_error_message(&error, r)); + + return 0; +#else + return log_error_errno(SYNTHETIC_ERRNO(ENOSYS), + "Booting into boot loader menu not supported."); +#endif +} + +int prepare_boot_loader_entry(void) { + + if (!arg_boot_loader_entry) + return 0; + +#if ENABLE_LOGIND + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + sd_bus *bus; + int r; + + r = acquire_bus(BUS_FULL, &bus); + if (r < 0) + return r; + + r = bus_call_method(bus, bus_login_mgr, "SetRebootToBootLoaderEntry", &error, NULL, "s", arg_boot_loader_entry); + if (r < 0) + return log_error_errno(r, "Cannot set boot into loader entry '%s': %s", arg_boot_loader_entry, bus_error_message(&error, r)); + + return 0; +#else + return log_error_errno(SYNTHETIC_ERRNO(ENOSYS), + "Booting into boot loader entry not supported."); +#endif +} + +int logind_schedule_shutdown(void) { + +#if ENABLE_LOGIND + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + char date[FORMAT_TIMESTAMP_MAX]; + const char *action; + const char *log_action; + sd_bus *bus; + int r; + + r = acquire_bus(BUS_FULL, &bus); + if (r < 0) + return r; + + switch (arg_action) { + case ACTION_HALT: + action = "halt"; + log_action = "Shutdown"; + break; + case ACTION_POWEROFF: + action = "poweroff"; + log_action = "Shutdown"; + break; + case ACTION_KEXEC: + action = "kexec"; + log_action = "Reboot via kexec"; + break; + case ACTION_EXIT: + action = "exit"; + log_action = "Shutdown"; + break; + case ACTION_REBOOT: + default: + action = "reboot"; + log_action = "Reboot"; + break; + } + + if (arg_dry_run) + action = strjoina("dry-", action); + + (void) logind_set_wall_message(); + + r = bus_call_method(bus, bus_login_mgr, "ScheduleShutdown", &error, NULL, "st", action, arg_when); + if (r < 0) + return log_warning_errno(r, "Failed to call ScheduleShutdown in logind, proceeding with immediate shutdown: %s", bus_error_message(&error, r)); + + if (!arg_quiet) + log_info("%s scheduled for %s, use 'shutdown -c' to cancel.", log_action, format_timestamp_style(date, sizeof(date), arg_when, arg_timestamp_style)); + return 0; +#else + return log_error_errno(SYNTHETIC_ERRNO(ENOSYS), + "Cannot schedule shutdown without logind support, proceeding with immediate shutdown."); +#endif +} + +int logind_cancel_shutdown(void) { +#if ENABLE_LOGIND + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + sd_bus *bus; + int r; + + r = acquire_bus(BUS_FULL, &bus); + if (r < 0) + return r; + + (void) logind_set_wall_message(); + + r = bus_call_method(bus, bus_login_mgr, "CancelScheduledShutdown", &error, NULL, NULL); + if (r < 0) + return log_warning_errno(r, "Failed to talk to logind, shutdown hasn't been cancelled: %s", bus_error_message(&error, r)); + + return 0; +#else + return log_error_errno(SYNTHETIC_ERRNO(ENOSYS), + "Not compiled with logind support, cannot cancel scheduled shutdowns."); +#endif +} + +int help_boot_loader_entry(void) { +#if ENABLE_LOGIND + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + _cleanup_strv_free_ char **l = NULL; + sd_bus *bus; + char **i; + int r; + + r = acquire_bus(BUS_FULL, &bus); + if (r < 0) + return r; + + r = bus_get_property_strv(bus, bus_login_mgr, "BootLoaderEntries", &error, &l); + if (r < 0) + return log_error_errno(r, "Failed to enumerate boot loader entries: %s", bus_error_message(&error, r)); + + if (strv_isempty(l)) + return log_error_errno(SYNTHETIC_ERRNO(ENODATA), "No boot loader entries discovered."); + + STRV_FOREACH(i, l) + puts(*i); + + return 0; +#else + return log_error_errno(SYNTHETIC_ERRNO(ENOSYS), + "Not compiled with logind support, cannot display boot loader entries."); +#endif +} |