initreq.h

   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