293 lines
14 KiB
C
293 lines
14 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdio_ext.h>
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#include "alloc-util.h"
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#include "async.h"
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#include "bus-util.h"
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#include "dbus-cgroup.h"
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#include "dbus-execute.h"
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#include "dbus-kill.h"
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#include "dbus-service.h"
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#include "fd-util.h"
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#include "fileio.h"
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#include "path-util.h"
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#include "service.h"
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#include "string-util.h"
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#include "strv.h"
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#include "unit.h"
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static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, service_type, ServiceType);
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static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, service_result, ServiceResult);
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static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_restart, service_restart, ServiceRestart);
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static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_notify_access, notify_access, NotifyAccess);
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static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_emergency_action, emergency_action, EmergencyAction);
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const sd_bus_vtable bus_service_vtable[] = {
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SD_BUS_VTABLE_START(0),
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SD_BUS_PROPERTY("Type", "s", property_get_type, offsetof(Service, type), SD_BUS_VTABLE_PROPERTY_CONST),
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SD_BUS_PROPERTY("Restart", "s", property_get_restart, offsetof(Service, restart), SD_BUS_VTABLE_PROPERTY_CONST),
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SD_BUS_PROPERTY("PIDFile", "s", NULL, offsetof(Service, pid_file), SD_BUS_VTABLE_PROPERTY_CONST),
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SD_BUS_PROPERTY("NotifyAccess", "s", property_get_notify_access, offsetof(Service, notify_access), SD_BUS_VTABLE_PROPERTY_CONST),
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SD_BUS_PROPERTY("RestartUSec", "t", bus_property_get_usec, offsetof(Service, restart_usec), SD_BUS_VTABLE_PROPERTY_CONST),
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SD_BUS_PROPERTY("TimeoutStartUSec", "t", bus_property_get_usec, offsetof(Service, timeout_start_usec), SD_BUS_VTABLE_PROPERTY_CONST),
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SD_BUS_PROPERTY("TimeoutStopUSec", "t", bus_property_get_usec, offsetof(Service, timeout_stop_usec), SD_BUS_VTABLE_PROPERTY_CONST),
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SD_BUS_PROPERTY("RuntimeMaxUSec", "t", bus_property_get_usec, offsetof(Service, runtime_max_usec), SD_BUS_VTABLE_PROPERTY_CONST),
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SD_BUS_PROPERTY("WatchdogUSec", "t", bus_property_get_usec, offsetof(Service, watchdog_usec), SD_BUS_VTABLE_PROPERTY_CONST),
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BUS_PROPERTY_DUAL_TIMESTAMP("WatchdogTimestamp", offsetof(Service, watchdog_timestamp), 0),
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SD_BUS_PROPERTY("PermissionsStartOnly", "b", bus_property_get_bool, offsetof(Service, permissions_start_only), SD_BUS_VTABLE_PROPERTY_CONST),
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SD_BUS_PROPERTY("RootDirectoryStartOnly", "b", bus_property_get_bool, offsetof(Service, root_directory_start_only), SD_BUS_VTABLE_PROPERTY_CONST),
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SD_BUS_PROPERTY("RemainAfterExit", "b", bus_property_get_bool, offsetof(Service, remain_after_exit), SD_BUS_VTABLE_PROPERTY_CONST),
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SD_BUS_PROPERTY("GuessMainPID", "b", bus_property_get_bool, offsetof(Service, guess_main_pid), SD_BUS_VTABLE_PROPERTY_CONST),
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SD_BUS_PROPERTY("MainPID", "u", bus_property_get_pid, offsetof(Service, main_pid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
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SD_BUS_PROPERTY("ControlPID", "u", bus_property_get_pid, offsetof(Service, control_pid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
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SD_BUS_PROPERTY("BusName", "s", NULL, offsetof(Service, bus_name), SD_BUS_VTABLE_PROPERTY_CONST),
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SD_BUS_PROPERTY("FileDescriptorStoreMax", "u", bus_property_get_unsigned, offsetof(Service, n_fd_store_max), SD_BUS_VTABLE_PROPERTY_CONST),
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SD_BUS_PROPERTY("NFileDescriptorStore", "u", bus_property_get_unsigned, offsetof(Service, n_fd_store), 0),
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SD_BUS_PROPERTY("StatusText", "s", NULL, offsetof(Service, status_text), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
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SD_BUS_PROPERTY("StatusErrno", "i", NULL, offsetof(Service, status_errno), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
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SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Service, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
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SD_BUS_PROPERTY("USBFunctionDescriptors", "s", NULL, offsetof(Service, usb_function_descriptors), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
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SD_BUS_PROPERTY("USBFunctionStrings", "s", NULL, offsetof(Service, usb_function_strings), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
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SD_BUS_PROPERTY("UID", "u", NULL, offsetof(Unit, ref_uid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
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SD_BUS_PROPERTY("GID", "u", NULL, offsetof(Unit, ref_gid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
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SD_BUS_PROPERTY("NRestarts", "u", bus_property_get_unsigned, offsetof(Service, n_restarts), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
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BUS_EXEC_STATUS_VTABLE("ExecMain", offsetof(Service, main_exec_status), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
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BUS_EXEC_COMMAND_LIST_VTABLE("ExecStartPre", offsetof(Service, exec_command[SERVICE_EXEC_START_PRE]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
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BUS_EXEC_COMMAND_LIST_VTABLE("ExecStart", offsetof(Service, exec_command[SERVICE_EXEC_START]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
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BUS_EXEC_COMMAND_LIST_VTABLE("ExecStartPost", offsetof(Service, exec_command[SERVICE_EXEC_START_POST]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
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BUS_EXEC_COMMAND_LIST_VTABLE("ExecReload", offsetof(Service, exec_command[SERVICE_EXEC_RELOAD]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
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BUS_EXEC_COMMAND_LIST_VTABLE("ExecStop", offsetof(Service, exec_command[SERVICE_EXEC_STOP]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
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BUS_EXEC_COMMAND_LIST_VTABLE("ExecStopPost", offsetof(Service, exec_command[SERVICE_EXEC_STOP_POST]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
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/* The following four are obsolete, and thus marked hidden here. They moved into the Unit interface */
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SD_BUS_PROPERTY("StartLimitInterval", "t", bus_property_get_usec, offsetof(Unit, start_limit.interval), SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
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SD_BUS_PROPERTY("StartLimitBurst", "u", bus_property_get_unsigned, offsetof(Unit, start_limit.burst), SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
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SD_BUS_PROPERTY("StartLimitAction", "s", property_get_emergency_action, offsetof(Unit, start_limit_action), SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
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SD_BUS_PROPERTY("FailureAction", "s", property_get_emergency_action, offsetof(Unit, failure_action), SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
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SD_BUS_PROPERTY("RebootArgument", "s", NULL, offsetof(Unit, reboot_arg), SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN),
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SD_BUS_VTABLE_END
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};
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static int bus_service_set_transient_property(
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Service *s,
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const char *name,
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sd_bus_message *message,
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UnitWriteFlags flags,
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sd_bus_error *error) {
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ServiceExecCommand ci;
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int r;
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assert(s);
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assert(name);
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assert(message);
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flags |= UNIT_PRIVATE;
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if (streq(name, "RemainAfterExit")) {
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int b;
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r = sd_bus_message_read(message, "b", &b);
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if (r < 0)
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return r;
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if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
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s->remain_after_exit = b;
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unit_write_settingf(UNIT(s), flags, name, "RemainAfterExit=%s", yes_no(b));
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}
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return 1;
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} else if (streq(name, "Type")) {
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const char *t;
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ServiceType k;
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r = sd_bus_message_read(message, "s", &t);
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if (r < 0)
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return r;
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k = service_type_from_string(t);
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if (k < 0)
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return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid service type %s", t);
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if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
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s->type = k;
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unit_write_settingf(UNIT(s), flags, name, "Type=%s", service_type_to_string(s->type));
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}
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return 1;
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} else if (streq(name, "RuntimeMaxUSec")) {
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usec_t u;
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r = sd_bus_message_read(message, "t", &u);
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if (r < 0)
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return r;
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if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
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s->runtime_max_usec = u;
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unit_write_settingf(UNIT(s), flags, name, "RuntimeMaxSec=" USEC_FMT "us", u);
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}
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return 1;
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} else if (streq(name, "Restart")) {
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ServiceRestart sr;
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const char *v;
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r = sd_bus_message_read(message, "s", &v);
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if (r < 0)
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return r;
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if (isempty(v))
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sr = SERVICE_RESTART_NO;
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else {
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sr = service_restart_from_string(v);
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if (sr < 0)
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return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid restart setting: %s", v);
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}
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if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
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s->restart = sr;
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unit_write_settingf(UNIT(s), flags, name, "Restart=%s", service_restart_to_string(sr));
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}
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return 1;
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} else if (STR_IN_SET(name,
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"StandardInputFileDescriptor",
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"StandardOutputFileDescriptor",
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"StandardErrorFileDescriptor")) {
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int fd;
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r = sd_bus_message_read(message, "h", &fd);
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if (r < 0)
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return r;
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if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
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int copy;
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copy = fcntl(fd, F_DUPFD_CLOEXEC, 3);
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if (copy < 0)
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return -errno;
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if (streq(name, "StandardInputFileDescriptor")) {
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asynchronous_close(s->stdin_fd);
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s->stdin_fd = copy;
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} else if (streq(name, "StandardOutputFileDescriptor")) {
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asynchronous_close(s->stdout_fd);
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s->stdout_fd = copy;
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} else {
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asynchronous_close(s->stderr_fd);
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s->stderr_fd = copy;
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}
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s->exec_context.stdio_as_fds = true;
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}
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return 1;
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} else if (streq(name, "FileDescriptorStoreMax")) {
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uint32_t u;
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r = sd_bus_message_read(message, "u", &u);
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if (r < 0)
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return r;
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if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
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s->n_fd_store_max = (unsigned) u;
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unit_write_settingf(UNIT(s), flags, name, "FileDescriptorStoreMax=%" PRIu32, u);
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}
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return 1;
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} else if (streq(name, "NotifyAccess")) {
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const char *t;
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NotifyAccess k;
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r = sd_bus_message_read(message, "s", &t);
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if (r < 0)
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return r;
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k = notify_access_from_string(t);
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if (k < 0)
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return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid notify access setting %s", t);
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if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
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s->notify_access = k;
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unit_write_settingf(UNIT(s), flags, name, "NotifyAccess=%s", notify_access_to_string(s->notify_access));
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}
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return 1;
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} else if ((ci = service_exec_command_from_string(name)) >= 0)
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return bus_exec_command_set_transient_property(UNIT(s), name, &s->exec_command[ci], message, flags, error);
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return 0;
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}
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int bus_service_set_property(
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Unit *u,
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const char *name,
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sd_bus_message *message,
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UnitWriteFlags flags,
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sd_bus_error *error) {
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Service *s = SERVICE(u);
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int r;
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assert(s);
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assert(name);
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assert(message);
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r = bus_cgroup_set_property(u, &s->cgroup_context, name, message, flags, error);
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if (r != 0)
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return r;
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if (u->transient && u->load_state == UNIT_STUB) {
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/* This is a transient unit, let's load a little more */
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r = bus_service_set_transient_property(s, name, message, flags, error);
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if (r != 0)
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return r;
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r = bus_exec_context_set_transient_property(u, &s->exec_context, name, message, flags, error);
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if (r != 0)
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return r;
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r = bus_kill_context_set_transient_property(u, &s->kill_context, name, message, flags, error);
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if (r != 0)
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return r;
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}
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return 0;
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}
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int bus_service_commit_properties(Unit *u) {
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assert(u);
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unit_update_cgroup_members_masks(u);
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unit_realize_cgroup(u);
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return 0;
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}
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