failure-action: generalize failure action to emergency action

1 files changed, 128 insertions, 0 deletions

diff --git a/src/core/emergency-action.c b/src/core/emergency-action.c
new file mode 100644
index 0000000000..90232bc57a
--- /dev/null
+++ b/src/core/emergency-action.c
@@ -0,0 +1,128 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Lennart Poettering
+  Copyright 2012 Michael Olbrich
+
+  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 <sys/reboot.h>
+#include <linux/reboot.h>
+
+#include "bus-error.h"
+#include "bus-util.h"
+#include "emergency-action.h"
+#include "special.h"
+#include "string-table.h"
+#include "terminal-util.h"
+
+static void log_and_status(Manager *m, const char *message, const char *reason) {
+        log_warning("%s: %s", message, reason);
+        manager_status_printf(m, STATUS_TYPE_EMERGENCY,
+                              ANSI_HIGHLIGHT_RED " !!  " ANSI_NORMAL,
+                              "%s: %s", message, reason);
+}
+
+int emergency_action(
+                Manager *m,
+                EmergencyAction action,
+                const char *reboot_arg,
+                const char *reason) {
+
+        assert(m);
+        assert(action >= 0);
+        assert(action < _EMERGENCY_ACTION_MAX);
+
+        if (action == EMERGENCY_ACTION_NONE)
+                return -ECANCELED;
+
+        if (!MANAGER_IS_SYSTEM(m)) {
+                /* Downgrade all options to simply exiting if we run
+                 * in user mode */
+
+                log_warning("Exiting: %s", reason);
+                m->exit_code = MANAGER_EXIT;
+                return -ECANCELED;
+        }
+
+        switch (action) {
+
+        case EMERGENCY_ACTION_REBOOT:
+                log_and_status(m, "Rebooting", reason);
+
+                (void) update_reboot_parameter_and_warn(reboot_arg);
+                (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_REBOOT_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
+
+                break;
+
+        case EMERGENCY_ACTION_REBOOT_FORCE:
+                log_and_status(m, "Forcibly rebooting", reason);
+
+                (void) update_reboot_parameter_and_warn(reboot_arg);
+                m->exit_code = MANAGER_REBOOT;
+
+                break;
+
+        case EMERGENCY_ACTION_REBOOT_IMMEDIATE:
+                log_and_status(m, "Rebooting immediately", reason);
+
+                sync();
+
+                if (!isempty(reboot_arg)) {
+                        log_info("Rebooting with argument '%s'.", reboot_arg);
+                        syscall(SYS_reboot, LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, LINUX_REBOOT_CMD_RESTART2, reboot_arg);
+                        log_warning_errno(errno, "Failed to reboot with parameter, retrying without: %m");
+                }
+
+                log_info("Rebooting.");
+                reboot(RB_AUTOBOOT);
+                break;
+
+        case EMERGENCY_ACTION_POWEROFF:
+                log_and_status(m, "Powering off", reason);
+                (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_POWEROFF_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
+                break;
+
+        case EMERGENCY_ACTION_POWEROFF_FORCE:
+                log_and_status(m, "Forcibly powering off", reason);
+                m->exit_code = MANAGER_POWEROFF;
+                break;
+
+        case EMERGENCY_ACTION_POWEROFF_IMMEDIATE:
+                log_and_status(m, "Powering off immediately", reason);
+
+                sync();
+
+                log_info("Powering off.");
+                reboot(RB_POWER_OFF);
+                break;
+
+        default:
+                assert_not_reached("Unknown emergency action");
+        }
+
+        return -ECANCELED;
+}
+
+static const char* const emergency_action_table[_EMERGENCY_ACTION_MAX] = {
+        [EMERGENCY_ACTION_NONE] = "none",
+        [EMERGENCY_ACTION_REBOOT] = "reboot",
+        [EMERGENCY_ACTION_REBOOT_FORCE] = "reboot-force",
+        [EMERGENCY_ACTION_REBOOT_IMMEDIATE] = "reboot-immediate",
+        [EMERGENCY_ACTION_POWEROFF] = "poweroff",
+        [EMERGENCY_ACTION_POWEROFF_FORCE] = "poweroff-force",
+        [EMERGENCY_ACTION_POWEROFF_IMMEDIATE] = "poweroff-immediate"
+};
+DEFINE_STRING_TABLE_LOOKUP(emergency_action, EmergencyAction);