init.h revision 830abe0424da52a715592077feaa5d1c2762f58d
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef _INIT_INIT_H
18#define _INIT_INIT_H
19
20int mtd_name_to_number(const char *name);
21
22void handle_control_message(const char *msg, const char *arg);
23
24int create_socket(const char *name, int type, mode_t perm,
25                  uid_t uid, gid_t gid);
26
27void *read_file(const char *fn, unsigned *_sz);
28
29void log_init(void);
30void log_set_level(int level);
31void log_close(void);
32void log_write(int level, const char *fmt, ...)
33    __attribute__ ((format(printf, 2, 3)));
34
35#define ERROR(x...)   log_write(3, "<3>init: " x)
36#define NOTICE(x...)  log_write(5, "<5>init: " x)
37#define INFO(x...)    log_write(6, "<6>init: " x)
38
39#define LOG_DEFAULT_LEVEL  3  /* messages <= this level are logged */
40#define LOG_UEVENTS        0  /* log uevent messages if 1. verbose */
41
42unsigned int decode_uid(const char *s);
43
44struct listnode
45{
46    struct listnode *next;
47    struct listnode *prev;
48};
49
50#define node_to_item(node, container, member) \
51    (container *) (((char*) (node)) - offsetof(container, member))
52
53#define list_declare(name) \
54    struct listnode name = { \
55        .next = &name, \
56        .prev = &name, \
57    }
58
59#define list_for_each(node, list) \
60    for (node = (list)->next; node != (list); node = node->next)
61
62void list_init(struct listnode *list);
63void list_add_tail(struct listnode *list, struct listnode *item);
64void list_remove(struct listnode *item);
65
66#define list_empty(list) ((list) == (list)->next)
67#define list_head(list) ((list)->next)
68#define list_tail(list) ((list)->prev)
69
70struct command
71{
72        /* list of commands in an action */
73    struct listnode clist;
74
75    int (*func)(int nargs, char **args);
76    int nargs;
77    char *args[1];
78};
79
80struct action {
81        /* node in list of all actions */
82    struct listnode alist;
83        /* node in the queue of pending actions */
84    struct listnode qlist;
85        /* node in list of actions for a trigger */
86    struct listnode tlist;
87
88    unsigned hash;
89    const char *name;
90
91    struct listnode commands;
92    struct command *current;
93};
94
95struct socketinfo {
96    struct socketinfo *next;
97    const char *name;
98    const char *type;
99    uid_t uid;
100    gid_t gid;
101    int perm;
102};
103
104struct svcenvinfo {
105    struct svcenvinfo *next;
106    const char *name;
107    const char *value;
108};
109
110#define SVC_DISABLED    0x01  /* do not autostart with class */
111#define SVC_ONESHOT     0x02  /* do not restart on exit */
112#define SVC_RUNNING     0x04  /* currently active */
113#define SVC_RESTARTING  0x08  /* waiting to restart */
114#define SVC_CONSOLE     0x10  /* requires console */
115#define SVC_CRITICAL    0x20  /* will reboot into recovery if keeps crashing */
116
117#define NR_SVC_SUPP_GIDS 12    /* twelve supplementary groups */
118
119#define SVC_MAXARGS 64
120
121struct service {
122        /* list of all services */
123    struct listnode slist;
124
125    const char *name;
126    const char *classname;
127
128    unsigned flags;
129    pid_t pid;
130    time_t time_started;    /* time of last start */
131    time_t time_crashed;    /* first crash within inspection window */
132    int nr_crashed;         /* number of times crashed within window */
133
134    uid_t uid;
135    gid_t gid;
136    gid_t supp_gids[NR_SVC_SUPP_GIDS];
137    size_t nr_supp_gids;
138
139    struct socketinfo *sockets;
140    struct svcenvinfo *envvars;
141
142    struct action onrestart;  /* Actions to execute on restart. */
143
144    /* keycodes for triggering this service via /dev/keychord */
145    int *keycodes;
146    int nkeycodes;
147    int keychord_id;
148
149    int ioprio_class;
150    int ioprio_pri;
151
152    int nargs;
153    /* "MUST BE AT THE END OF THE STRUCT" */
154    char *args[1];
155}; /*     ^-------'args' MUST be at the end of this struct! */
156
157int parse_config_file(const char *fn);
158
159struct service *service_find_by_name(const char *name);
160struct service *service_find_by_pid(pid_t pid);
161struct service *service_find_by_keychord(int keychord_id);
162void service_for_each(void (*func)(struct service *svc));
163void service_for_each_class(const char *classname,
164                            void (*func)(struct service *svc));
165void service_for_each_flags(unsigned matchflags,
166                            void (*func)(struct service *svc));
167void service_stop(struct service *svc);
168void service_start(struct service *svc, const char *dynamic_args);
169void property_changed(const char *name, const char *value);
170
171void drain_action_queue(void);
172struct action *action_remove_queue_head(void);
173void action_add_queue_tail(struct action *act);
174void action_for_each_trigger(const char *trigger,
175                             void (*func)(struct action *act));
176void queue_property_triggers(const char *name, const char *value);
177void queue_all_property_triggers();
178
179#define INIT_IMAGE_FILE	"/initlogo.rle"
180
181int load_565rle_image( char *file_name );
182
183#endif	/* _INIT_INIT_H */
184