init.h revision 504bc5175a8fe5a2f2552903afee761a86283cf4 
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);
28time_t gettime(void);
29
30void log_init(void);
31void log_set_level(int level);
32void log_close(void);
33void log_write(int level, const char *fmt, ...)
34    __attribute__ ((format(printf, 2, 3)));
35
36#define ERROR(x...)   log_write(3, "<3>init: " x)
37#define NOTICE(x...)  log_write(5, "<5>init: " x)
38#define INFO(x...)    log_write(6, "<6>init: " x)
39
40#define LOG_DEFAULT_LEVEL  3  /* messages <= this level are logged */
41#define LOG_UEVENTS        0  /* log uevent messages if 1. verbose */
42
43unsigned int decode_uid(const char *s);
44
45struct listnode
46{
47    struct listnode *next;
48    struct listnode *prev;
49};
50
51#define node_to_item(node, container, member) \
52    (container *) (((char*) (node)) - offsetof(container, member))
53
54#define list_declare(name) \
55    struct listnode name = { \
56        .next = &name, \
57        .prev = &name, \
58    }
59
60#define list_for_each(node, list) \
61    for (node = (list)->next; node != (list); node = node->next)
62
63void list_init(struct listnode *list);
64void list_add_tail(struct listnode *list, struct listnode *item);
65void list_remove(struct listnode *item);
66
67#define list_empty(list) ((list) == (list)->next)
68#define list_head(list) ((list)->next)
69#define list_tail(list) ((list)->prev)
70
71struct command
72{
73        /* list of commands in an action */
74    struct listnode clist;
75
76    int (*func)(int nargs, char **args);
77    int nargs;
78    char *args[1];
79};
80
81struct action {
82        /* node in list of all actions */
83    struct listnode alist;
84        /* node in the queue of pending actions */
85    struct listnode qlist;
86        /* node in list of actions for a trigger */
87    struct listnode tlist;
88
89    unsigned hash;
90    const char *name;
91
92    struct listnode commands;
93    struct command *current;
94};
95
96struct socketinfo {
97    struct socketinfo *next;
98    const char *name;
99    const char *type;
100    uid_t uid;
101    gid_t gid;
102    int perm;
103};
104
105struct svcenvinfo {
106    struct svcenvinfo *next;
107    const char *name;
108    const char *value;
109};
110
111#define SVC_DISABLED    0x01  /* do not autostart with class */
112#define SVC_ONESHOT     0x02  /* do not restart on exit */
113#define SVC_RUNNING     0x04  /* currently active */
114#define SVC_RESTARTING  0x08  /* waiting to restart */
115#define SVC_CONSOLE     0x10  /* requires console */
116#define SVC_CRITICAL    0x20  /* will reboot into recovery if keeps crashing */
117
118#define NR_SVC_SUPP_GIDS 12    /* twelve supplementary groups */
119
120#define SVC_MAXARGS 64
121
122struct service {
123        /* list of all services */
124    struct listnode slist;
125
126    const char *name;
127    const char *classname;
128
129    unsigned flags;
130    pid_t pid;
131    time_t time_started;    /* time of last start */
132    time_t time_crashed;    /* first crash within inspection window */
133    int nr_crashed;         /* number of times crashed within window */
134
135    uid_t uid;
136    gid_t gid;
137    gid_t supp_gids[NR_SVC_SUPP_GIDS];
138    size_t nr_supp_gids;
139
140    struct socketinfo *sockets;
141    struct svcenvinfo *envvars;
142
143    struct action onrestart;  /* Actions to execute on restart. */
144
145    /* keycodes for triggering this service via /dev/keychord */
146    int *keycodes;
147    int nkeycodes;
148    int keychord_id;
149
150    int ioprio_class;
151    int ioprio_pri;
152
153    int nargs;
154    /* "MUST BE AT THE END OF THE STRUCT" */
155    char *args[1];
156}; /*     ^-------'args' MUST be at the end of this struct! */
157
158int parse_config_file(const char *fn);
159
160struct service *service_find_by_name(const char *name);
161struct service *service_find_by_pid(pid_t pid);
162struct service *service_find_by_keychord(int keychord_id);
163void service_for_each(void (*func)(struct service *svc));
164void service_for_each_class(const char *classname,
165                            void (*func)(struct service *svc));
166void service_for_each_flags(unsigned matchflags,
167                            void (*func)(struct service *svc));
168void service_stop(struct service *svc);
169void service_start(struct service *svc, const char *dynamic_args);
170void property_changed(const char *name, const char *value);
171
172#define INIT_IMAGE_FILE	"/initlogo.rle"
173
174int load_565rle_image( char *file_name );
175
176#endif	/* _INIT_INIT_H */
177