src/shared/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 #pragma once
  15
  16 #include <sys/param.h>
  17
  18 #if defined(__FreeBSD_kernel__)
  19 #  define INIT_FIFO  "/etc/.initctl"
  20 #else
  21 #  define INIT_FIFO  "/dev/initctl"
  22 #endif
  23
  24 #define INIT_MAGIC 0x03091969
  25 #define INIT_CMD_START          0
  26 #define INIT_CMD_RUNLVL         1
  27 #define INIT_CMD_POWERFAIL      2
  28 #define INIT_CMD_POWERFAILNOW   3
  29 #define INIT_CMD_POWEROK        4
  30 #define INIT_CMD_BSD            5
  31 #define INIT_CMD_SETENV         6
  32 #define INIT_CMD_UNSETENV       7
  33
  34 #define INIT_CMD_CHANGECONS     12345
  35
  36 #ifdef MAXHOSTNAMELEN
  37 #  define INITRQ_HLEN   MAXHOSTNAMELEN
  38 #else
  39 #  define INITRQ_HLEN   64
  40 #endif
  41
  42 /*
  43  *      This is what BSD 4.4 uses when talking to init.
  44  *      Linux doesn't use this right now.
  45  */
  46 struct init_request_bsd {
  47         char    gen_id[8];              /* Beats me.. telnetd uses "fe" */
  48         char    tty_id[16];             /* Tty name minus /dev/tty      */
  49         char    host[INITRQ_HLEN];      /* Hostname                     */
  50         char    term_type[16];          /* Terminal type                */
  51         int     signal;                 /* Signal to send               */
  52         int     pid;                    /* Process to send to           */
  53         char    exec_name[128];         /* Program to execute           */
  54         char    reserved[128];          /* For future expansion.        */
  55 };
  56
  57 /*
  58  *      Because of legacy interfaces, "runlevel" and "sleeptime"
  59  *      aren't in a separate struct in the union.
  60  *
  61  *      The weird sizes are because init expects the whole
  62  *      struct to be 384 bytes.
  63  */
  64 struct init_request {
  65         int     magic;                  /* Magic number                 */
  66         int     cmd;                    /* What kind of request         */
  67         int     runlevel;               /* Runlevel to change to        */
  68         int     sleeptime;              /* Time between TERM and KILL   */
  69         union {
  70                 struct init_request_bsd bsd;
  71                 char                    data[368];
  72         } i;
  73 };