init.h revision dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0 
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
34#define ERROR(x...)   log_write(3, "<3>init: " x)
35#define NOTICE(x...)  log_write(5, "<5>init: " x)
36#define INFO(x...)    log_write(6, "<6>init: " x)
37
38#define LOG_DEFAULT_LEVEL  3  /* messages <= this level are logged */
39#define LOG_UEVENTS        0  /* log uevent messages if 1. verbose */
40
41unsigned int decode_uid(const char *s);
42
43struct listnode
44{
45    struct listnode *next;
46    struct listnode *prev;
47};
48
49#define node_to_item(node, container, member) \
50    (container *) (((char*) (node)) - offsetof(container, member))
51
52#define list_declare(name) \
53    struct listnode name = { \
54        .next = &name, \
55        .prev = &name, \
56    }
57
58#define list_for_each(node, list) \
59    for (node = (list)->next; node != (list); node = node->next)
60
61void list_init(struct listnode *list);
62void list_add_tail(struct listnode *list, struct listnode *item);
63void list_remove(struct listnode *item);
64
65#define list_empty(list) ((list) == (list)->next)
66#define list_head(list) ((list)->next)
67#define list_tail(list) ((list)->prev)
68
69struct command
70{
71        /* list of commands in an action */
72    struct listnode clist;
73
74    int (*func)(int nargs, char **args);
75    int nargs;
76    char *args[1];
77};
78
79struct action {
80        /* node in list of all actions */
81    struct listnode alist;
82        /* node in the queue of pending actions */
83    struct listnode qlist;
84        /* node in list of actions for a trigger */
85    struct listnode tlist;
86
87    unsigned hash;
88    const char *name;
89
90    struct listnode commands;
91    struct command *current;
92};
93
94struct socketinfo {
95    struct socketinfo *next;
96    const char *name;
97    const char *type;
98    uid_t uid;
99    gid_t gid;
100    int perm;
101};
102
103struct svcenvinfo {
104    struct svcenvinfo *next;
105    const char *name;
106    const char *value;
107};
108
109#define SVC_DISABLED    0x01  /* do not autostart with class */
110#define SVC_ONESHOT     0x02  /* do not restart on exit */
111#define SVC_RUNNING     0x04  /* currently active */
112#define SVC_RESTARTING  0x08  /* waiting to restart */
113#define SVC_CONSOLE     0x10  /* requires console */
114#define SVC_CRITICAL    0x20  /* will reboot into recovery if keeps crashing */
115
116#define NR_SVC_SUPP_GIDS 6    /* six supplementary groups */
117
118struct service {
119        /* list of all services */
120    struct listnode slist;
121
122    const char *name;
123    const char *classname;
124
125    unsigned flags;
126    pid_t pid;
127    time_t time_started;    /* time of last start */
128    time_t time_crashed;    /* first crash within inspection window */
129    int nr_crashed;         /* number of times crashed within window */
130
131    uid_t uid;
132    gid_t gid;
133    gid_t supp_gids[NR_SVC_SUPP_GIDS];
134    size_t nr_supp_gids;
135
136    struct socketinfo *sockets;
137    struct svcenvinfo *envvars;
138
139    int nargs;
140    char *args[1];
141    struct action onrestart;  /* Actions to execute on restart. */
142
143    /* keycodes for triggering this service via /dev/keychord */
144    int *keycodes;
145    int nkeycodes;
146    int keychord_id;
147};
148
149int parse_config_file(const char *fn);
150
151struct service *service_find_by_name(const char *name);
152struct service *service_find_by_pid(pid_t pid);
153struct service *service_find_by_keychord(int keychord_id);
154void service_for_each(void (*func)(struct service *svc));
155void service_for_each_class(const char *classname,
156                            void (*func)(struct service *svc));
157void service_for_each_flags(unsigned matchflags,
158                            void (*func)(struct service *svc));
159void service_stop(struct service *svc);
160void service_start(struct service *svc);
161void property_changed(const char *name, const char *value);
162
163struct action *action_remove_queue_head(void);
164void action_add_queue_tail(struct action *act);
165void action_for_each_trigger(const char *trigger,
166                             void (*func)(struct action *act));
167void queue_property_triggers(const char *name, const char *value);
168void queue_all_property_triggers();
169
170#define INIT_IMAGE_FILE	"/initlogo.rle"
171
172int load_565rle_image( char *file_name );
173
174#endif	/* _INIT_INIT_H */
175