src/shared/initreq.h

   1 /* SPDX-License-Identifier: LGPL-2.0-or-later */
   2 /*
   3  * Copyright (C) 1995-2004 Miquel van Smoorenburg
   4  * Version:     @(#)initreq.h  1.28  31-Mar-2004 MvS
   5  */
   6
   7 #pragma once
   8
   9 #include <sys/param.h>
  10
  11 #if defined(__FreeBSD_kernel__)
  12 #  define INIT_FIFO  "/etc/.initctl"
  13 #else
  14 #  define INIT_FIFO  "/dev/initctl"
  15 #endif
  16
  17 #define INIT_MAGIC 0x03091969
  18 #define INIT_CMD_START          0
  19 #define INIT_CMD_RUNLVL         1
  20 #define INIT_CMD_POWERFAIL      2
  21 #define INIT_CMD_POWERFAILNOW   3
  22 #define INIT_CMD_POWEROK        4
  23 #define INIT_CMD_BSD            5
  24 #define INIT_CMD_SETENV         6
  25 #define INIT_CMD_UNSETENV       7
  26
  27 #define INIT_CMD_CHANGECONS     12345
  28
  29 #ifdef MAXHOSTNAMELEN
  30 #  define INITRQ_HLEN   MAXHOSTNAMELEN
  31 #else
  32 #  define INITRQ_HLEN   64
  33 #endif
  34
  35 /*
  36  *      This is what BSD 4.4 uses when talking to init.
  37  *      Linux doesn't use this right now.
  38  */
  39 struct init_request_bsd {
  40         char    gen_id[8];              /* Beats me.. telnetd uses "fe" */
  41         char    tty_id[16];             /* Tty name minus /dev/tty      */
  42         char    host[INITRQ_HLEN];      /* Hostname                     */
  43         char    term_type[16];          /* Terminal type                */
  44         int     signal;                 /* Signal to send               */
  45         int     pid;                    /* Process to send to           */
  46         char    exec_name[128];         /* Program to execute           */
  47         char    reserved[128];          /* For future expansion.        */
  48 };
  49
  50 /*
  51  *      Because of legacy interfaces, "runlevel" and "sleeptime"
  52  *      aren't in a separate struct in the union.
  53  *
  54  *      The weird sizes are because init expects the whole
  55  *      struct to be 384 bytes.
  56  */
  57 struct init_request {
  58         int     magic;                  /* Magic number                 */
  59         int     cmd;                    /* What kind of request         */
  60         int     runlevel;               /* Runlevel to change to        */
  61         int     sleeptime;              /* Time between TERM and KILL   */
  62         union {
  63                 struct init_request_bsd bsd;
  64                 char                    data[368];
  65         } i;
  66 };