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