src/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 program is free software; you can redistribute it and/or modify
   7  *              it under the terms of the GNU General Public License as published by
   8  *              the Free Software Foundation; either version 2 of the License, or
   9  *              (at your option) any later version.
  10  *
  11  *              This program is distributed in the hope that it will be useful,
  12  *              but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *              MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *              GNU General Public License for more details.
  15  *
  16  *              You should have received a copy of the GNU General Public License
  17  *              along with this program; if not, write to the Free Software
  18  *              Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  *
  20  * Version:     @(#)initreq.h  1.28  31-Mar-2004 MvS
  21  *
  22  */
  23 #ifndef _INITREQ_H
  24 #define _INITREQ_H
  25
  26 #include <sys/param.h>
  27
  28 #if defined(__FreeBSD_kernel__)
  29 #  define INIT_FIFO  "/etc/.initctl"
  30 #else
  31 #  define INIT_FIFO  "/dev/initctl"
  32 #endif
  33
  34 #define INIT_MAGIC 0x03091969
  35 #define INIT_CMD_START          0
  36 #define INIT_CMD_RUNLVL         1
  37 #define INIT_CMD_POWERFAIL      2
  38 #define INIT_CMD_POWERFAILNOW   3
  39 #define INIT_CMD_POWEROK        4
  40 #define INIT_CMD_BSD            5
  41 #define INIT_CMD_SETENV         6
  42 #define INIT_CMD_UNSETENV       7
  43
  44 #define INIT_CMD_CHANGECONS     12345
  45
  46 #ifdef MAXHOSTNAMELEN
  47 #  define INITRQ_HLEN   MAXHOSTNAMELEN
  48 #else
  49 #  define INITRQ_HLEN   64
  50 #endif
  51
  52 /*
  53  *      This is what BSD 4.4 uses when talking to init.
  54  *      Linux doesn't use this right now.
  55  */
  56 struct init_request_bsd {
  57         char    gen_id[8];              /* Beats me.. telnetd uses "fe" */
  58         char    tty_id[16];             /* Tty name minus /dev/tty      */
  59         char    host[INITRQ_HLEN];      /* Hostname                     */
  60         char    term_type[16];          /* Terminal type                */
  61         int     signal;                 /* Signal to send               */
  62         int     pid;                    /* Process to send to           */
  63         char    exec_name[128];         /* Program to execute           */
  64         char    reserved[128];          /* For future expansion.        */
  65 };
  66
  67
  68 /*
  69  *      Because of legacy interfaces, "runlevel" and "sleeptime"
  70  *      aren't in a seperate struct in the union.
  71  *
  72  *      The weird sizes are because init expects the whole
  73  *      struct to be 384 bytes.
  74  */
  75 struct init_request {
  76         int     magic;                  /* Magic number                 */
  77         int     cmd;                    /* What kind of request         */
  78         int     runlevel;               /* Runlevel to change to        */
  79         int     sleeptime;              /* Time between TERM and KILL   */
  80         union {
  81                 struct init_request_bsd bsd;
  82                 char                    data[368];
  83         } i;
  84 };
  85
  86 #endif