chiark / gitweb /
02726efe254db076bd29445f6bd64911ccbc5868
[elogind.git] / src / service.h
1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
3 #ifndef fooservicehfoo
4 #define fooservicehfoo
5
6 /***
7   This file is part of systemd.
8
9   Copyright 2010 Lennart Poettering
10
11   systemd is free software; you can redistribute it and/or modify it
12   under the terms of the GNU General Public License as published by
13   the Free Software Foundation; either version 2 of the License, or
14   (at your option) any later version.
15
16   systemd is distributed in the hope that it will be useful, but
17   WITHOUT ANY WARRANTY; without even the implied warranty of
18   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19   General Public License for more details.
20
21   You should have received a copy of the GNU General Public License
22   along with systemd; If not, see <http://www.gnu.org/licenses/>.
23 ***/
24
25 typedef struct Service Service;
26
27 #include "unit.h"
28 #include "path.h"
29 #include "ratelimit.h"
30 #include "service.h"
31
32 typedef enum ServiceState {
33         SERVICE_DEAD,
34         SERVICE_START_PRE,
35         SERVICE_START,
36         SERVICE_START_POST,
37         SERVICE_RUNNING,
38         SERVICE_EXITED,            /* Nothing is running anymore, but RemainAfterExit is true hence this is OK */
39         SERVICE_RELOAD,
40         SERVICE_STOP,              /* No STOP_PRE state, instead just register multiple STOP executables */
41         SERVICE_STOP_SIGTERM,
42         SERVICE_STOP_SIGKILL,
43         SERVICE_STOP_POST,
44         SERVICE_FINAL_SIGTERM,     /* In case the STOP_POST executable hangs, we shoot that down, too */
45         SERVICE_FINAL_SIGKILL,
46         SERVICE_FAILED,
47         SERVICE_AUTO_RESTART,
48         _SERVICE_STATE_MAX,
49         _SERVICE_STATE_INVALID = -1
50 } ServiceState;
51
52 typedef enum ServiceRestart {
53         SERVICE_RESTART_NO,
54         SERVICE_RESTART_ON_SUCCESS,
55         SERVICE_RESTART_ON_FAILURE,
56         SERVICE_RESTART_ON_ABORT,
57         SERVICE_RESTART_ALWAYS,
58         _SERVICE_RESTART_MAX,
59         _SERVICE_RESTART_INVALID = -1
60 } ServiceRestart;
61
62 typedef enum ServiceType {
63         SERVICE_SIMPLE,   /* we fork and go on right-away (i.e. modern socket activated daemons) */
64         SERVICE_FORKING,  /* forks by itself (i.e. traditional daemons) */
65         SERVICE_ONESHOT,  /* we fork and wait until the program finishes (i.e. programs like fsck which run and need to finish before we continue) */
66         SERVICE_DBUS,     /* we fork and wait until a specific D-Bus name appears on the bus */
67         SERVICE_NOTIFY,   /* we fork and wait until a daemon sends us a ready message with sd_notify() */
68         _SERVICE_TYPE_MAX,
69         _SERVICE_TYPE_INVALID = -1
70 } ServiceType;
71
72 typedef enum ServiceExecCommand {
73         SERVICE_EXEC_START_PRE,
74         SERVICE_EXEC_START,
75         SERVICE_EXEC_START_POST,
76         SERVICE_EXEC_RELOAD,
77         SERVICE_EXEC_STOP,
78         SERVICE_EXEC_STOP_POST,
79         _SERVICE_EXEC_COMMAND_MAX,
80         _SERVICE_EXEC_COMMAND_INVALID = -1
81 } ServiceExecCommand;
82
83 typedef enum NotifyAccess {
84         NOTIFY_NONE,
85         NOTIFY_ALL,
86         NOTIFY_MAIN,
87         _NOTIFY_ACCESS_MAX,
88         _NOTIFY_ACCESS_INVALID = -1
89 } NotifyAccess;
90
91 typedef enum ServiceResult {
92         SERVICE_SUCCESS,
93         SERVICE_FAILURE_RESOURCES,
94         SERVICE_FAILURE_TIMEOUT,
95         SERVICE_FAILURE_EXIT_CODE,
96         SERVICE_FAILURE_SIGNAL,
97         SERVICE_FAILURE_CORE_DUMP,
98         SERVICE_FAILURE_WATCHDOG,
99         _SERVICE_RESULT_MAX,
100         _SERVICE_RESULT_INVALID = -1
101 } ServiceResult;
102
103 struct Service {
104         Unit meta;
105
106         ServiceType type;
107         ServiceRestart restart;
108
109         /* If set we'll read the main daemon PID from this file */
110         char *pid_file;
111
112         usec_t restart_usec;
113         usec_t timeout_usec;
114
115         dual_timestamp watchdog_timestamp;
116         usec_t watchdog_usec;
117         Watch watchdog_watch;
118
119         ExecCommand* exec_command[_SERVICE_EXEC_COMMAND_MAX];
120         ExecContext exec_context;
121
122         ServiceState state, deserialized_state;
123
124         /* The exit status of the real main process */
125         ExecStatus main_exec_status;
126
127         /* The currently executed control process */
128         ExecCommand *control_command;
129
130         /* The currently executed main process, which may be NULL if
131          * the main process got started via forking mode and not by
132          * us */
133         ExecCommand *main_command;
134
135         /* The ID of the control command currently being executed */
136         ServiceExecCommand control_command_id;
137
138         pid_t main_pid, control_pid;
139         int socket_fd;
140
141         int fsck_passno;
142
143         bool permissions_start_only;
144         bool root_directory_start_only;
145         bool remain_after_exit;
146         bool guess_main_pid;
147
148         /* If we shut down, remember why */
149         ServiceResult result;
150         ServiceResult reload_result;
151
152         bool main_pid_known:1;
153         bool main_pid_alien:1;
154         bool bus_name_good:1;
155         bool forbid_restart:1;
156         bool got_socket_fd:1;
157 #ifdef HAVE_SYSV_COMPAT
158         bool sysv_has_lsb:1;
159         bool sysv_enabled:1;
160         int sysv_start_priority_from_rcnd;
161         int sysv_start_priority;
162
163         char *sysv_path;
164         char *sysv_runlevels;
165         usec_t sysv_mtime;
166 #endif
167
168         char *bus_name;
169
170         char *status_text;
171
172         RateLimit ratelimit;
173
174         UnitRef accept_socket;
175
176         Watch timer_watch;
177         PathSpec *pid_file_pathspec;
178
179         NotifyAccess notify_access;
180 };
181
182 extern const UnitVTable service_vtable;
183
184 struct Socket;
185
186 int service_set_socket_fd(Service *s, int fd, struct Socket *socket);
187
188 const char* service_state_to_string(ServiceState i);
189 ServiceState service_state_from_string(const char *s);
190
191 const char* service_restart_to_string(ServiceRestart i);
192 ServiceRestart service_restart_from_string(const char *s);
193
194 const char* service_type_to_string(ServiceType i);
195 ServiceType service_type_from_string(const char *s);
196
197 const char* service_exec_command_to_string(ServiceExecCommand i);
198 ServiceExecCommand service_exec_command_from_string(const char *s);
199
200 const char* notify_access_to_string(NotifyAccess i);
201 NotifyAccess notify_access_from_string(const char *s);
202
203 const char* service_result_to_string(ServiceResult i);
204 ServiceResult service_result_from_string(const char *s);
205
206 #endif