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1 /*
2 * initreq.h Interface to talk to init through /dev/initctl.
3 *
4 * Copyright (C) 1995-2004 Miquel van Smoorenburg
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * Version: @(#)initreq.h 1.28 31-Mar-2004 MvS
12 *
13 */
14 #ifndef _INITREQ_H
15 #define _INITREQ_H
16
17 #include <sys/param.h>
18
19 #if defined(__FreeBSD_kernel__)
20 # define INIT_FIFO "/etc/.initctl"
21 #else
22 # define INIT_FIFO "/dev/initctl"
23 #endif
24
25 #define INIT_MAGIC 0x03091969
26 #define INIT_CMD_START 0
27 #define INIT_CMD_RUNLVL 1
28 #define INIT_CMD_POWERFAIL 2
29 #define INIT_CMD_POWERFAILNOW 3
30 #define INIT_CMD_POWEROK 4
31 #define INIT_CMD_BSD 5
32 #define INIT_CMD_SETENV 6
33 #define INIT_CMD_UNSETENV 7
34
35 #define INIT_CMD_CHANGECONS 12345
36
37 #ifdef MAXHOSTNAMELEN
38 # define INITRQ_HLEN MAXHOSTNAMELEN
39 #else
40 # define INITRQ_HLEN 64
41 #endif
42
43 /*
44 * This is what BSD 4.4 uses when talking to init.
45 * Linux doesn't use this right now.
46 */
47 struct init_request_bsd {
48 char gen_id[8]; /* Beats me.. telnetd uses "fe" */
49 char tty_id[16]; /* Tty name minus /dev/tty */
50 char host[INITRQ_HLEN]; /* Hostname */
51 char term_type[16]; /* Terminal type */
52 int signal; /* Signal to send */
53 int pid; /* Process to send to */
54 char exec_name[128]; /* Program to execute */
55 char reserved[128]; /* For future expansion. */
56 };
57
58
59 /*
60 * Because of legacy interfaces, "runlevel" and "sleeptime"
61 * aren't in a seperate struct in the union.
62 *
63 * The weird sizes are because init expects the whole
64 * struct to be 384 bytes.
65 */
66 struct init_request {
67 int magic; /* Magic number */
68 int cmd; /* What kind of request */
69 int runlevel; /* Runlevel to change to */
70 int sleeptime; /* Time between TERM and KILL */
71 union {
72 struct init_request_bsd bsd;
73 char data[368];
74 } i;
75 };
76
77 #endif