chiark / gitweb /
Prep v239: Fix ustreams move of the unneeded target_table into its own also unneeded...
[elogind.git] / src / login / logind-action.c
index bd5664e90539bab48983fed5d8977690c3297da2..a9f73912950ada051f179be13d19e0ea3cd9af2d 100644 (file)
@@ -1,28 +1,45 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+/* SPDX-License-Identifier: LGPL-2.1+ */
 
-/***
-  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 "alloc-util.h"
+#include "bus-error.h"
+#include "bus-util.h"
 #include "conf-parser.h"
-#include "special.h"
-#include "dbus-common.h"
+#include "format-util.h"
 #include "logind-action.h"
+#include "process-util.h"
+#include "sleep-config.h"
+//#include "special.h"
+#include "string-table.h"
+#include "terminal-util.h"
+#include "user-util.h"
+
+/// Additional includes needed by elogind
+#include "fd-util.h"
+#include "fileio.h"
+#include "sd-messages.h"
+#include "strv.h"
+
+#if 0 /// elogind does this itself. No target table required
+const char* manager_target_for_action(HandleAction handle) {
+        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,
+                [HANDLE_SUSPEND_THEN_HIBERNATE] = SPECIAL_SUSPEND_THEN_HIBERNATE_TARGET,
+        };
+
+        assert(handle >= 0);
+        if (handle < (ssize_t) ELEMENTSOF(target_table))
+                return target_table[handle];
+        return NULL;
+}
+#endif // 0
 
 int manager_handle_action(
                 Manager *m,
@@ -38,22 +55,18 @@ int manager_handle_action(
                 [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
+                [HANDLE_HYBRID_SLEEP] = "Hibernating and suspending...",
+                [HANDLE_SUSPEND_THEN_HIBERNATE] = "Suspending, then hibernating...",
         };
 
-        DBusError error;
-        int r;
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
         InhibitWhat inhibit_operation;
+        Inhibitor *offending = NULL;
+        bool supported;
+#if 0 /// elogind uses its own variant, which can use the handle directly.
+        const char *target;
+#endif // 0
+        int r;
 
         assert(m);
 
@@ -63,9 +76,20 @@ int manager_handle_action(
                 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 (inhibit_key > 0) {
-                if (manager_is_inhibited(m, inhibit_key, INHIBIT_BLOCK, NULL, true, false, 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;
                 }
@@ -73,35 +97,90 @@ int manager_handle_action(
 
         /* 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;
         }
 
-        inhibit_operation = handle == HANDLE_SUSPEND || handle == HANDLE_HIBERNATE || handle == HANDLE_HYBRID_SLEEP ? INHIBIT_SLEEP : INHIBIT_SHUTDOWN;
+#if 0 /// elogind needs its own can_sleep() variant.
+        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_SUSPEND_THEN_HIBERNATE)
+                supported = can_sleep("suspend-then-hibernate") > 0;
+#else
+        if (handle == HANDLE_SUSPEND)
+                supported = can_sleep(m, "suspend") > 0;
+        else if (handle == HANDLE_HIBERNATE)
+                supported = can_sleep(m, "hibernate") > 0;
+        else if (handle == HANDLE_HYBRID_SLEEP)
+                supported = can_sleep(m, "hybrid-sleep") > 0;
+        else if (handle == HANDLE_SUSPEND_THEN_HIBERNATE)
+                supported = can_sleep(m, "suspend-then-hibernate") > 0;
+#endif // 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;
+        }
+
+#if 0 /// elogind uses its own variant, which can use the handle directly.
+        assert_se(target = manager_target_for_action(handle));
+#endif // 0
+
+        inhibit_operation = IN_SET(handle, HANDLE_SUSPEND, HANDLE_HIBERNATE,
+                                           HANDLE_HYBRID_SLEEP,
+                                           HANDLE_SUSPEND_THEN_HIBERNATE) ? 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)) {
+            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.", inhibit_what_to_string(inhibit_operation));
+                        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.", inhibit_what_to_string(inhibit_operation));
-                warn_melody();
+                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]);
 
-        dbus_error_init(&error);
-        r = bus_manager_shutdown_or_sleep_now_or_later(m, target_table[handle], inhibit_operation, &error);
+#if 0 /// elogind uses its own variant, which can use the handle directly.
+        r = bus_manager_shutdown_or_sleep_now_or_later(m, target, inhibit_operation, &error);
+#else
+        r = bus_manager_shutdown_or_sleep_now_or_later(m, handle, inhibit_operation, &error);
+#endif // 0
         if (r < 0) {
-                log_error("Failed to execute operation: %s", bus_error_message(&error));
-                dbus_error_free(&error);
+                log_error("Failed to execute operation: %s", bus_error_message(&error, r));
                 return r;
         }
 
@@ -117,7 +196,8 @@ static const char* const handle_action_table[_HANDLE_ACTION_MAX] = {
         [HANDLE_SUSPEND] = "suspend",
         [HANDLE_HIBERNATE] = "hibernate",
         [HANDLE_HYBRID_SLEEP] = "hybrid-sleep",
-        [HANDLE_LOCK] = "lock"
+        [HANDLE_SUSPEND_THEN_HIBERNATE] = "suspend-then-hibernate",
+        [HANDLE_LOCK] = "lock",
 };
 
 DEFINE_STRING_TABLE_LOOKUP(handle_action, HandleAction);