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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20
  21 /*
  22  *      Define symbols to identify the version of Unix this is.
  23  *      Define all the symbols that apply correctly.
  24  */
  25
  26 #define BSD4_2
  27 #define BSD
  28 #define RTU
  29
  30 /* SYSTEM_TYPE should indicate the kind of system you are using.
  31  It sets the Lisp variable system-type.  */
  32
  33 #define SYSTEM_TYPE "rtu"
  34
  35 /* NOMULTIPLEJOBS should be defined if your system's shell
  36  does not have "job control" (the ability to stop a program,
  37  run some other program, then continue the first one).  */
  38
  39 #define NOMULTIPLEJOBS
  40
  41 /* Emacs can read input using SIGIO and buffering characters itself,
  42    or using CBREAK mode and making C-g cause SIGINT.
  43    The choice is controlled by the variable interrupt_input.
  44    Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO)
  45
  46    SIGIO can be used only on systems that implement it (4.2 and 4.3).
  47    CBREAK mode has two disadvantages
  48      1) At least in 4.2, it is impossible to handle the Meta key properly.
  49         I hear that in system V this problem does not exist.
  50      2) Control-G causes output to be discarded.
  51         I do not know whether this can be fixed in system V.
  52
  53    Another method of doing input is planned but not implemented.
  54    It would have Emacs fork off a separate process
  55    to read the input and send it to the true Emacs process
  56    through a pipe.
  57 */
  58
  59 #undef INTERRUPT_INPUT
  60
  61 /* Letter to use in finding device name of first pty,
  62   if system supports pty's.  'a' means it is /dev/ptya0  */
  63
  64 #define FIRST_PTY_LETTER 'z'    /* i.e. no PTY_LETTERs */
  65
  66 /*
  67  *      Define HAVE_TIMEVAL if the system supports the BSD style clock values.
  68  *      Look in <sys/time.h> for a timeval structure.
  69  */
  70
  71 #define HAVE_TIMEVAL
  72
  73 /*
  74  *      Define HAVE_SELECT if the system supports the `select' system call.
  75  */
  76
  77 #define HAVE_SELECT
  78
  79 /*
  80  *      Define HAVE_PTYS if the system supports pty devices.
  81  */
  82
  83 #define HAVE_PTYS
  84
  85 /* Define this macro if system defines a type `union wait'.  */
  86
  87 #define HAVE_UNION_WAIT
  88
  89 /* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */
  90
  91 #define HAVE_SOCKETS
  92
  93 /*
  94  *      Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
  95  *      The 4.2 opendir, etc., library functions.
  96  */
  97
  98 #define NONSYSTEM_DIR_LIBRARY
  99
 100 /* Define this symbol if your system has the functions bcopy, etc. */
 101 /* The system library bcopy() is broken in RTU.  For one thing, it expects
 102    the length to be less than 64k. */
 103 #undef BSTRING
 104
 105 /* subprocesses should be defined if you want to
 106    have code for asynchronous subprocesses
 107    (as used in M-x compile and M-x shell).
 108    This is generally OS dependent, and not supported
 109    under most USG systems. */
 110
 111 #define subprocesses
 112
 113 /* If your system uses COFF (Common Object File Format) then define the
 114    preprocessor symbol "COFF". */
 115
 116 #undef COFF
 117
 118 /* define MAIL_USE_FLOCK if the mailer uses flock
 119    to interlock access to /usr/spool/mail/$USER.
 120    The alternative is that a lock file named
 121    /usr/spool/mail/$USER.lock.  */
 122
 123 #undef MAIL_USE_FLOCK
 124
 125 /* Define CLASH_DETECTION if you want lock files to be written
 126    so that Emacs can tell instantly when you try to modify
 127    a file that someone else has modified in his Emacs.  */
 128
 129 #undef CLASH_DETECTION
 130
 131 /* We use the Berkeley (and usg5.2.2) interface to nlist.  */
 132
 133 #define NLIST_STRUCT
 134
 135 /* The symbol in the kernel where the load average is found
 136    is named _avenrun.  */
 137
 138 #define LDAV_SYMBOL "_avenrun"
 139 \f
 140 /* Special hacks needed to make Emacs run on this system.  */
 141
 142 /* On RTU systems (like USG) the system calls are interruptible by signals
 143  that the user program has elected to catch.  Thus the system call
 144  must be retried in these cases.  To handle this without massive
 145  changes in the source code, we remap the standard system call names
 146  to names for our own functions in sysdep.c that do the system call
 147  with retries. */
 148
 149 #define read sys_read
 150 #define open sys_open
 151 #define write sys_write
 152
 153 #define INTERRUPTIBLE_OPEN
 154 #define INTERRUPTIBLE_IO
 155
 156 /* The "fsync" call on RTU versions 3.0 and 3.1 is badly broken!
 157    This hack below isn't the best solution, but without it this
 158    program will cause the whole system to hang!  !@#$#%$ Masscomp!  */
 159
 160 #define fsync(x) 0      /* "Comment out" fsync calls */
 161
 162 /* RTU has IPC instead of Unix-domain sockets.  */
 163
 164 #define HAVE_SYSVIPC
 165
 166 /* This is how to get the device name of the tty end of a pty.  */
 167 #define PTY_TTY_NAME_SPRINTF \
 168             sprintf (pty_name, "/dev/ttyp%x", i);
 169
 170 /* This is how to get the device name of the control end of a pty.  */
 171 #define PTY_NAME_SPRINTF \
 172         sprintf (pty_name, "/dev/pty%x", i);
 173
 174 /* (Assume) we do have vfork.  */
 175
 176 #define HAVE_VFORK
 177
 178 /* Process groups work in the traditional BSD manner.  */
 179
 180 #define BSD_PGRPS