src/s/xenix.h

   1 /* Definitions file for GNU Emacs running SCO Xenix 386 Release 2.2
   2    Copyright (C) 1988 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 1, 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  *      Define symbols to identify the version of Unix this is.
  22  *      Define all the symbols that apply correctly.
  23  */
  24
  25 /* #define UNIPLUS */
  26 #define XENIX
  27 #define USG5
  28 #define USG
  29 /* #define HPUX */
  30 /* #define UMAX */
  31 /* #define BSD4_1 */
  32 /* #define BSD4_2 */
  33 /* #define BSD4_3 */
  34 /* #define BSD */
  35 /* #define VMS */
  36
  37 /* SYSTEM_TYPE should indicate the kind of system you are using.
  38  It sets the Lisp variable system-type.  */
  39
  40 #define SYSTEM_TYPE "xenix"
  41
  42 /* NOMULTIPLEJOBS should be defined if your system's shell
  43  does not have "job control" (the ability to stop a program,
  44  run some other program, then continue the first one).  */
  45
  46 #define NOMULTIPLEJOBS
  47
  48 /* Emacs can read input using SIGIO and buffering characters itself,
  49    or using CBREAK mode and making C-g cause SIGINT.
  50    The choice is controlled by the variable interrupt_input.
  51    Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO)
  52
  53    SIGIO can be used only on systems that implement it (4.2 and 4.3).
  54    CBREAK mode has two disadvatages
  55      1) At least in 4.2, it is impossible to handle the Meta key properly.
  56         I hear that in system V this problem does not exist.
  57      2) Control-G causes output to be discarded.
  58         I do not know whether this can be fixed in system V.
  59
  60    Another method of doing input is planned but not implemented.
  61    It would have Emacs fork off a separate process
  62    to read the input and send it to the true Emacs process
  63    through a pipe.
  64 */
  65
  66 /* #define INTERRUPT_INPUT */
  67
  68 /* Letter to use in finding device name of first pty,
  69   if system supports pty's.  'p' means it is /dev/ptyp0  */
  70
  71 /* #define FIRST_PTY_LETTER 'p' */
  72
  73 /*
  74  *      Define HAVE_TERMIO if the system provides sysV-style ioctls
  75  *      for terminal control.
  76  */
  77
  78 #define HAVE_TERMIO
  79
  80 /*
  81  *      Define HAVE_TIMEVAL if the system supports the BSD style clock values.
  82  *      Look in <sys/time.h> for a timeval structure.
  83  */
  84
  85 /* #define HAVE_TIMEVAL */
  86
  87 /*
  88  *      Define HAVE_SELECT if the system supports the `select' system call.
  89  */
  90
  91 /* #define HAVE_SELECT */
  92
  93 /*
  94  *      Define HAVE_PTYS if the system supports pty devices.
  95  */
  96
  97 /* #define HAVE_PTYS */
  98
  99 /* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */
 100
 101 /* #define HAVE_SOCKETS */
 102
 103 /*
 104  *      Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
 105  *      The 4.2 opendir, etc., library functions.
 106  */
 107
 108 #define NONSYSTEM_DIR_LIBRARY
 109
 110 /* Define this symbol if your system has the functions bcopy, etc. */
 111
 112 /* #define BSTRING */
 113
 114 /* subprocesses should be defined if you want to
 115  have code for asynchronous subprocesses
 116  (as used in M-x compile and M-x shell).
 117  This is supposed to work now on system V release 2.  */
 118
 119 #define subprocesses
 120
 121 /* If your system uses COFF (Common Object File Format) then define the
 122    preprocessor symbol "COFF". */
 123
 124 /* #define COFF */
 125
 126 /* Xenix requires completely different unexec code
 127    which lives in a separate file.  Specify the file name.  */
 128
 129 #define UNEXEC unexenix.o
 130
 131 /* define MAIL_USE_FLOCK if the mailer uses flock
 132    to interlock access to /usr/spool/mail/$USER.
 133    The alternative is that a lock file named
 134    /usr/spool/mail/$USER.lock.  */
 135
 136 #define MAIL_USE_FLOCK
 137
 138 /* Define CLASH_DETECTION if you want lock files to be written
 139    so that Emacs can tell instantly when you try to modify
 140    a file that someone else has modified in his Emacs.  */
 141
 142 /* The way this is implemented requires long filenames... */
 143 /* #define CLASH_DETECTION */
 144
 145 /* Define SHORTNAMES if the C compiler can distinguish only
 146    short names.  It means that the stuff in ../shortnames
 147    must be run to convert the long names to short ones.  */
 148
 149 /* #define SHORTNAMES */
 150
 151 /* We do not use the Berkeley (and usg5.2.2) interface to nlist.  */
 152
 153 /* #define NLIST_STRUCT */
 154
 155 /* Compensate for one incompatibility between Xenix and V.0.  */
 156 #define n_zeroes n_name[0]
 157
 158 /* The file containing the kernel's symbol table is called /xenix.  */
 159
 160 #define KERNEL_FILE "/xenix"
 161
 162 /* The symbol in the kernel where the load average is found
 163    is named avenrun.  */
 164
 165 #define LDAV_SYMBOL "_avenrun"
 166 \f
 167 /* Special hacks needed to make Emacs run on this system.  */
 168
 169 /*
 170  *      Make the sigsetmask function go away.  Don't know what the
 171  *      ramifications of this are, but doesn't seem possible to
 172  *      emulate it properly anyway at this point.
 173  */
 174
 175 #define sigsetmask(mask)        /* Null expansion */
 176
 177 /* setjmp and longjmp can safely replace _setjmp and _longjmp,
 178    but they will run slower.  */
 179
 180 #define _setjmp setjmp
 181 #define _longjmp longjmp
 182
 183 /* On USG systems the system calls are interruptable by signals
 184  that the user program has elected to catch.  Thus the system call
 185  must be retried in these cases.  To handle this without massive
 186  changes in the source code, we remap the standard system call names
 187  to names for our own functions in sysdep.c that do the system call
 188  with retries. */
 189
 190 #define read sys_read
 191 #define open sys_open
 192 #define write sys_write
 193
 194 #define INTERRUPTIBLE_OPEN
 195 #define INTERRUPTIBLE_IO
 196
 197 /* On USG systems these have different names */
 198
 199 #define index strchr
 200 #define rindex strrchr
 201
 202 /* Compiler bug bites on many systems when default ADDR_CORRECT is used.  */
 203
 204 #define ADDR_CORRECT(x) (x)
 205
 206 /* Prevent -lg from being used for debugging.  Not implemented?  */
 207
 208 #define LIBS_DEBUG
 209
 210 /* Switches for linking temacs.  */
 211
 212 #define LD_SWITCH_SYSTEM -i
 213
 214 /* Xenix implements sysV style IPC.  */
 215
 216 #define HAVE_SYSVIPC
 217
 218 /* Use terminfo instead of termcap.  */
 219
 220 /* Tell Emacs to use Terminfo.  */
 221
 222 #define TERMINFO
 223
 224 /* Tell Xenix curses to BE Terminfo.  */
 225 #define M_TERMINFO
 226
 227 /* Control program name for etc/fakemail to run.  */
 228
 229 #ifdef SMAIL
 230 #define MAIL_PROGRAM_NAME "/usr/bin/smail -q0"
 231 #else
 232 #define MAIL_PROGRAM_NAME "/usr/lib/mail/execmail"
 233 #endif
 234
 235 /* Some variants have TIOCGETC, but the structures to go with it
 236    are not declared.  */
 237
 238 #define BROKEN_TIOCGETC