src/s/rtu.h

   1 /* Definitions file for GNU Emacs running on RTU 3.0, ucb universe.
   2    Copyright (C) 1986, 1999, 2002, 2003, 2004,
   3                  2005, 2006 Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs; see the file COPYING.  If not, write to
  19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.  */
  21
  22
  23 /*
  24  *      Define symbols to identify the version of Unix this is.
  25  *      Define all the symbols that apply correctly.
  26  */
  27
  28 #define BSD4_2
  29 #define BSD_SYSTEM
  30 #define RTU
  31
  32 /* SYSTEM_TYPE should indicate the kind of system you are using.
  33  It sets the Lisp variable system-type.  */
  34
  35 #define SYSTEM_TYPE "rtu"
  36
  37 /* NOMULTIPLEJOBS should be defined if your system's shell
  38  does not have "job control" (the ability to stop a program,
  39  run some other program, then continue the first one).  */
  40
  41 #define NOMULTIPLEJOBS
  42
  43 /* Emacs can read input using SIGIO and buffering characters itself,
  44    or using CBREAK mode and making C-g cause SIGINT.
  45    The choice is controlled by the variable interrupt_input.
  46    Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO)
  47
  48    SIGIO can be used only on systems that implement it (4.2 and 4.3).
  49    CBREAK mode has two disadvantages
  50      1) At least in 4.2, it is impossible to handle the Meta key properly.
  51         I hear that in system V this problem does not exist.
  52      2) Control-G causes output to be discarded.
  53         I do not know whether this can be fixed in system V.
  54
  55    Another method of doing input is planned but not implemented.
  56    It would have Emacs fork off a separate process
  57    to read the input and send it to the true Emacs process
  58    through a pipe.
  59 */
  60
  61 #undef INTERRUPT_INPUT
  62
  63 /* Letter to use in finding device name of first pty,
  64   if system supports pty's.  'a' means it is /dev/ptya0  */
  65
  66 #define FIRST_PTY_LETTER 'z'    /* i.e. no PTY_LETTERs */
  67
  68 /*
  69  *      Define HAVE_PTYS if the system supports pty devices.
  70  */
  71
  72 #define HAVE_PTYS
  73
  74 /* Define this macro if system defines a type `union wait'.  */
  75
  76 #define HAVE_UNION_WAIT
  77
  78 /* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */
  79
  80 #define HAVE_SOCKETS
  81
  82 /*
  83  *      Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
  84  *      The 4.2 opendir, etc., library functions.
  85  */
  86
  87 #define NONSYSTEM_DIR_LIBRARY
  88
  89 /* Define this symbol if your system has the functions bcopy, etc. */
  90 /* The system library bcopy() is broken in RTU.  For one thing, it expects
  91    the length to be less than 64k. */
  92 #undef BSTRING
  93
  94 /* subprocesses should be defined if you want to
  95    have code for asynchronous subprocesses
  96    (as used in M-x compile and M-x shell).
  97    This is generally OS dependent, and not supported
  98    under most USG systems. */
  99
 100 #define subprocesses
 101
 102 /* If your system uses COFF (Common Object File Format) then define the
 103    preprocessor symbol "COFF". */
 104
 105 #undef COFF
 106
 107 /* define MAIL_USE_FLOCK if the mailer uses flock
 108    to interlock access to /usr/spool/mail/$USER.
 109    The alternative is that a lock file named
 110    /usr/spool/mail/$USER.lock.  */
 111
 112 #undef MAIL_USE_FLOCK
 113
 114 /* Define CLASH_DETECTION if you want lock files to be written
 115    so that Emacs can tell instantly when you try to modify
 116    a file that someone else has modified in his Emacs.  */
 117
 118 #undef CLASH_DETECTION
 119
 120 /* The symbol in the kernel where the load average is found
 121    is named _avenrun.  */
 122
 123 #define LDAV_SYMBOL "_avenrun"
 124 \f
 125 /* Special hacks needed to make Emacs run on this system.  */
 126
 127 /* The "fsync" call on RTU versions 3.0 and 3.1 is badly broken!
 128    This hack below isn't the best solution, but without it this
 129    program will cause the whole system to hang!  !@#$#%$ Masscomp!  */
 130
 131 #define fsync(x) 0      /* "Comment out" fsync calls */
 132
 133 /* RTU has IPC instead of Unix-domain sockets.  */
 134
 135 #define HAVE_SYSVIPC
 136
 137 /* This is how to get the device name of the tty end of a pty.  */
 138 #define PTY_TTY_NAME_SPRINTF \
 139             sprintf (pty_name, "/dev/ttyp%x", i);
 140
 141 /* This is how to get the device name of the control end of a pty.  */
 142 #define PTY_NAME_SPRINTF \
 143         sprintf (pty_name, "/dev/pty%x", i);
 144
 145 /* Process groups work in the traditional BSD manner.  */
 146
 147 #define BSD_PGRPS
 148
 149 /* arch-tag: 0908970b-1cc0-4d57-b866-61b9bd029a0d
 150    (do not change this comment) */