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[sysvinit.git] / src / init.h
1 /*
2 * init.h Several defines and declarations to be
3 * included by all modules of the init program.
4 *
5 * Version: @(#)init.h 2.85-5 02-Jul-2003 miquels@cistron.nl
6 *
7 * Copyright (C) 1998-2003 Miquel van Smoorenburg.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 *
23 */
24
25 /* Standard configuration */
26 #define CHANGE_WAIT 0 /* Change runlevel while
27 waiting for a process to exit? */
28 /* Debug and test modes */
29 #define DEBUG 0 /* Debug code off */
30 #define INITDEBUG 0 /* Fork at startup to debug init. */
31
32 /* Some constants */
33 #define INITPID 1 /* pid of first process */
34 #define PIPE_FD 10 /* Fileno of initfifo. */
35 #define STATE_PIPE 11 /* used to pass state through exec */
36
37 /* Failsafe configuration */
38 #define MAXSPAWN 10 /* Max times respawned in.. */
39 #define TESTTIME 120 /* this much seconds */
40 #define SLEEPTIME 300 /* Disable time */
41
42 /* Default path inherited by every child. */
43 #define PATH_DEFAULT "/sbin:/usr/sbin:/bin:/usr/bin"
44
45
46 /* Prototypes. */
47 void write_utmp_wtmp(char *user, char *id, int pid, int type, char *line);
48 void write_wtmp(char *user, char *id, int pid, int type, char *line);
49 #ifdef __GNUC__
50 __attribute__ ((format (printf, 2, 3)))
51 #endif
52 void initlog(int loglevel, char *fmt, ...);
53 void set_term(int how);
54 void print(char *fmt);
55
56 /* from dowall.c */
57 void wall(const char *text, int remote);
58
59 #if DEBUG
60 # define INITDBG(level, fmt, args...) initlog(level, fmt, ##args)
61 #else
62 # define INITDBG(level, fmt, args...)
63 #endif
64
65 /* Actions to be taken by init */
66 #define RESPAWN 1
67 #define WAIT 2
68 #define ONCE 3
69 #define BOOT 4
70 #define BOOTWAIT 5
71 #define POWERFAIL 6
72 #define POWERWAIT 7
73 #define POWEROKWAIT 8
74 #define CTRLALTDEL 9
75 #define OFF 10
76 #define ONDEMAND 11
77 #define INITDEFAULT 12
78 #define SYSINIT 13
79 #define POWERFAILNOW 14
80 #define KBREQUEST 15
81
82 /* Information about a process in the in-core inittab */
83 typedef struct _child_ {
84 int flags; /* Status of this entry */
85 int exstat; /* Exit status of process */
86 int pid; /* Pid of this process */
87 time_t tm; /* When respawned last */
88 int count; /* Times respawned in the last 2 minutes */
89 char id[8]; /* Inittab id (must be unique) */
90 char rlevel[12]; /* run levels */
91 int action; /* what to do (see list below) */
92 char process[128]; /* The command line */
93 struct _child_ *new; /* New entry (after inittab re-read) */
94 struct _child_ *next; /* For the linked list */
95 } CHILD;
96
97 /* Values for the 'flags' field */
98 #define RUNNING 2 /* Process is still running */
99 #define KILLME 4 /* Kill this process */
100 #define DEMAND 8 /* "runlevels" a b c */
101 #define FAILING 16 /* process respawns rapidly */
102 #define WAITING 32 /* We're waiting for this process */
103 #define ZOMBIE 64 /* This process is already dead */
104 #define XECUTED 128 /* Set if spawned once or more times */
105
106 /* Log levels. */
107 #define L_CO 1 /* Log on the console. */
108 #define L_SY 2 /* Log with syslog() */
109 #define L_VB (L_CO|L_SY) /* Log with both. */
110
111 #ifndef NO_PROCESS
112 # define NO_PROCESS 0
113 #endif
114
115 /*
116 * Global variables.
117 */
118 extern CHILD *family;
119 extern int wrote_wtmp_reboot;
120 extern int wrote_utmp_reboot;
121 extern int wrote_wtmp_rlevel;
122 extern int wrote_utmp_rlevel;
123 extern char thislevel;
124 extern char prevlevel;
125
126 /* Tokens in state parser */
127 #define C_VER 1
128 #define C_END 2
129 #define C_REC 3
130 #define C_EOR 4
131 #define C_LEV 5
132 #define C_FLAG 6
133 #define C_ACTION 7
134 #define C_PROCESS 8
135 #define C_PID 9
136 #define C_EXS 10
137 #define C_EOF -1
138 #define D_RUNLEVEL -2
139 #define D_THISLEVEL -3
140 #define D_PREVLEVEL -4
141 #define D_GOTSIGN -5
142 #define D_WROTE_WTMP_REBOOT -6
143 #define D_WROTE_UTMP_REBOOT -7
144 #define D_SLTIME -8
145 #define D_DIDBOOT -9
146 #define D_WROTE_WTMP_RLEVEL -16
147 #define D_WROTE_UTMP_RLEVEL -17
148