src/s/rtu.h

   1 /* Definitions file for GNU Emacs running on RTU 3.0, ucb universe.
   2    Copyright (C) 1986 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs 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, or (at your option)
   9 any later version.
  10
  11 GNU Emacs 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 GNU Emacs; see the file COPYING.  If not, write to
  18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21
  22 /*
  23  *      Define symbols to identify the version of Unix this is.
  24  *      Define all the symbols that apply correctly.
  25  */
  26
  27 #define BSD4_2
  28 #define BSD
  29 #define RTU
  30
  31 /* SYSTEM_TYPE should indicate the kind of system you are using.
  32  It sets the Lisp variable system-type.  */
  33
  34 #define SYSTEM_TYPE "rtu"
  35
  36 /* NOMULTIPLEJOBS should be defined if your system's shell
  37  does not have "job control" (the ability to stop a program,
  38  run some other program, then continue the first one).  */
  39
  40 #define NOMULTIPLEJOBS
  41
  42 /* Emacs can read input using SIGIO and buffering characters itself,
  43    or using CBREAK mode and making C-g cause SIGINT.
  44    The choice is controlled by the variable interrupt_input.
  45    Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO)
  46
  47    SIGIO can be used only on systems that implement it (4.2 and 4.3).
  48    CBREAK mode has two disadvantages
  49      1) At least in 4.2, it is impossible to handle the Meta key properly.
  50         I hear that in system V this problem does not exist.
  51      2) Control-G causes output to be discarded.
  52         I do not know whether this can be fixed in system V.
  53
  54    Another method of doing input is planned but not implemented.
  55    It would have Emacs fork off a separate process
  56    to read the input and send it to the true Emacs process
  57    through a pipe.
  58 */
  59
  60 #undef INTERRUPT_INPUT
  61
  62 /* Letter to use in finding device name of first pty,
  63   if system supports pty's.  'a' means it is /dev/ptya0  */
  64
  65 #define FIRST_PTY_LETTER 'z'    /* i.e. no PTY_LETTERs */
  66
  67 /*
  68  *      Define HAVE_PTYS if the system supports pty devices.
  69  */
  70
  71 #define HAVE_PTYS
  72
  73 /* Define this macro if system defines a type `union wait'.  */
  74
  75 #define HAVE_UNION_WAIT
  76
  77 /* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */
  78
  79 #define HAVE_SOCKETS
  80
  81 /*
  82  *      Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
  83  *      The 4.2 opendir, etc., library functions.
  84  */
  85
  86 #define NONSYSTEM_DIR_LIBRARY
  87
  88 /* Define this symbol if your system has the functions bcopy, etc. */
  89 /* The system library bcopy() is broken in RTU.  For one thing, it expects
  90    the length to be less than 64k. */
  91 #undef BSTRING
  92
  93 /* subprocesses should be defined if you want to
  94    have code for asynchronous subprocesses
  95    (as used in M-x compile and M-x shell).
  96    This is generally OS dependent, and not supported
  97    under most USG systems. */
  98
  99 #define subprocesses
 100
 101 /* If your system uses COFF (Common Object File Format) then define the
 102    preprocessor symbol "COFF". */
 103
 104 #undef COFF
 105
 106 /* define MAIL_USE_FLOCK if the mailer uses flock
 107    to interlock access to /usr/spool/mail/$USER.
 108    The alternative is that a lock file named
 109    /usr/spool/mail/$USER.lock.  */
 110
 111 #undef MAIL_USE_FLOCK
 112
 113 /* Define CLASH_DETECTION if you want lock files to be written
 114    so that Emacs can tell instantly when you try to modify
 115    a file that someone else has modified in his Emacs.  */
 116
 117 #undef CLASH_DETECTION
 118
 119 /* We use the Berkeley (and usg5.2.2) interface to nlist.  */
 120
 121 #define NLIST_STRUCT
 122
 123 /* The symbol in the kernel where the load average is found
 124    is named _avenrun.  */
 125
 126 #define LDAV_SYMBOL "_avenrun"
 127 \f
 128 /* Special hacks needed to make Emacs run on this system.  */
 129
 130 /* On RTU systems (like USG) the system calls are interruptible by signals
 131  that the user program has elected to catch.  Thus the system call
 132  must be retried in these cases.  To handle this without massive
 133  changes in the source code, we remap the standard system call names
 134  to names for our own functions in sysdep.c that do the system call
 135  with retries. */
 136
 137 #define read sys_read
 138 #define open sys_open
 139 #define write sys_write
 140
 141 #define INTERRUPTIBLE_OPEN
 142 #define INTERRUPTIBLE_IO
 143
 144 /* The "fsync" call on RTU versions 3.0 and 3.1 is badly broken!
 145    This hack below isn't the best solution, but without it this
 146    program will cause the whole system to hang!  !@#$#%$ Masscomp!  */
 147
 148 #define fsync(x) 0      /* "Comment out" fsync calls */
 149
 150 /* RTU has IPC instead of Unix-domain sockets.  */
 151
 152 #define HAVE_SYSVIPC
 153
 154 /* This is how to get the device name of the tty end of a pty.  */
 155 #define PTY_TTY_NAME_SPRINTF \
 156             sprintf (pty_name, "/dev/ttyp%x", i);
 157
 158 /* This is how to get the device name of the control end of a pty.  */
 159 #define PTY_NAME_SPRINTF \
 160         sprintf (pty_name, "/dev/pty%x", i);
 161
 162 /* (Assume) we do have vfork.  */
 163
 164 #define HAVE_VFORK
 165
 166 /* Process groups work in the traditional BSD manner.  */
 167
 168 #define BSD_PGRPS