diff options
Diffstat (limited to 'src/grp-login/systemd-logind/logind-action.c')
| -rw-r--r-- | src/grp-login/systemd-logind/logind-action.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/src/grp-login/systemd-logind/logind-action.c b/src/grp-login/systemd-logind/logind-action.c new file mode 100644 index 0000000000..0004148462 --- /dev/null +++ b/src/grp-login/systemd-logind/logind-action.c @@ -0,0 +1,179 @@ +/*** + This file is part of systemd. + + Copyright 2012 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 <unistd.h> + +#include "sd-bus/bus-error.h" +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/formats-util.h" +#include "systemd-basic/process-util.h" +#include "systemd-basic/special.h" +#include "systemd-basic/string-table.h" +#include "systemd-basic/terminal-util.h" +#include "systemd-basic/user-util.h" +#include "systemd-shared/bus-util.h" +#include "systemd-shared/conf-parser.h" +#include "systemd-shared/sleep-config.h" + +#include "logind-action.h" + +int manager_handle_action( + Manager *m, + InhibitWhat inhibit_key, + HandleAction handle, + bool ignore_inhibited, + bool is_edge) { + + static const char * const message_table[_HANDLE_ACTION_MAX] = { + [HANDLE_POWEROFF] = "Powering Off...", + [HANDLE_REBOOT] = "Rebooting...", + [HANDLE_HALT] = "Halting...", + [HANDLE_KEXEC] = "Rebooting via kexec...", + [HANDLE_SUSPEND] = "Suspending...", + [HANDLE_HIBERNATE] = "Hibernating...", + [HANDLE_HYBRID_SLEEP] = "Hibernating and suspending..." + }; + + static const char * const target_table[_HANDLE_ACTION_MAX] = { + [HANDLE_POWEROFF] = SPECIAL_POWEROFF_TARGET, + [HANDLE_REBOOT] = SPECIAL_REBOOT_TARGET, + [HANDLE_HALT] = SPECIAL_HALT_TARGET, + [HANDLE_KEXEC] = SPECIAL_KEXEC_TARGET, + [HANDLE_SUSPEND] = SPECIAL_SUSPEND_TARGET, + [HANDLE_HIBERNATE] = SPECIAL_HIBERNATE_TARGET, + [HANDLE_HYBRID_SLEEP] = SPECIAL_HYBRID_SLEEP_TARGET + }; + + _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + InhibitWhat inhibit_operation; + Inhibitor *offending = NULL; + bool supported; + int r; + + assert(m); + + /* If the key handling is turned off, don't do anything */ + if (handle == HANDLE_IGNORE) { + log_debug("Refusing operation, as it is turned off."); + return 0; + } + + if (inhibit_key == INHIBIT_HANDLE_LID_SWITCH) { + /* If the last system suspend or startup is too close, + * let's not suspend for now, to give USB docking + * stations some time to settle so that we can + * properly watch its displays. */ + if (m->lid_switch_ignore_event_source) { + log_debug("Ignoring lid switch request, system startup or resume too close."); + return 0; + } + } + + /* If the key handling is inhibited, don't do anything */ + if (!ignore_inhibited && inhibit_key > 0) { + if (manager_is_inhibited(m, inhibit_key, INHIBIT_BLOCK, NULL, true, false, 0, NULL)) { + log_debug("Refusing operation, %s is inhibited.", inhibit_what_to_string(inhibit_key)); + return 0; + } + } + + /* Locking is handled differently from the rest. */ + if (handle == HANDLE_LOCK) { + + if (!is_edge) + return 0; + + log_info("Locking sessions..."); + session_send_lock_all(m, true); + return 1; + } + + if (handle == HANDLE_SUSPEND) + supported = can_sleep("suspend") > 0; + else if (handle == HANDLE_HIBERNATE) + supported = can_sleep("hibernate") > 0; + else if (handle == HANDLE_HYBRID_SLEEP) + supported = can_sleep("hybrid-sleep") > 0; + else if (handle == HANDLE_KEXEC) + supported = access(KEXEC, X_OK) >= 0; + else + supported = true; + + if (!supported) { + log_warning("Requested operation not supported, ignoring."); + return -EOPNOTSUPP; + } + + if (m->action_what) { + log_debug("Action already in progress, ignoring."); + return -EALREADY; + } + + inhibit_operation = IN_SET(handle, HANDLE_SUSPEND, HANDLE_HIBERNATE, HANDLE_HYBRID_SLEEP) ? INHIBIT_SLEEP : INHIBIT_SHUTDOWN; + + /* If the actual operation is inhibited, warn and fail */ + if (!ignore_inhibited && + manager_is_inhibited(m, inhibit_operation, INHIBIT_BLOCK, NULL, false, false, 0, &offending)) { + _cleanup_free_ char *comm = NULL, *u = NULL; + + get_process_comm(offending->pid, &comm); + u = uid_to_name(offending->uid); + + /* If this is just a recheck of the lid switch then don't warn about anything */ + if (!is_edge) { + log_debug("Refusing operation, %s is inhibited by UID "UID_FMT"/%s, PID "PID_FMT"/%s.", + inhibit_what_to_string(inhibit_operation), + offending->uid, strna(u), + offending->pid, strna(comm)); + return 0; + } + + log_error("Refusing operation, %s is inhibited by UID "UID_FMT"/%s, PID "PID_FMT"/%s.", + inhibit_what_to_string(inhibit_operation), + offending->uid, strna(u), + offending->pid, strna(comm)); + + return -EPERM; + } + + log_info("%s", message_table[handle]); + + r = bus_manager_shutdown_or_sleep_now_or_later(m, target_table[handle], inhibit_operation, &error); + if (r < 0) { + log_error("Failed to execute operation: %s", bus_error_message(&error, r)); + return r; + } + + return 1; +} + +static const char* const handle_action_table[_HANDLE_ACTION_MAX] = { + [HANDLE_IGNORE] = "ignore", + [HANDLE_POWEROFF] = "poweroff", + [HANDLE_REBOOT] = "reboot", + [HANDLE_HALT] = "halt", + [HANDLE_KEXEC] = "kexec", + [HANDLE_SUSPEND] = "suspend", + [HANDLE_HIBERNATE] = "hibernate", + [HANDLE_HYBRID_SLEEP] = "hybrid-sleep", + [HANDLE_LOCK] = "lock" +}; + +DEFINE_STRING_TABLE_LOOKUP(handle_action, HandleAction); +DEFINE_CONFIG_PARSE_ENUM(config_parse_handle_action, handle_action, HandleAction, "Failed to parse handle action setting"); |