src/s/vms.h

   1 /* system description header for VMS
   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  *      Define symbols to identify the version of Unix this is.
  22  *      Define all the symbols that apply correctly.
  23  */
  24
  25 #ifndef VMS                 /* Decus cpp doesn't define this but VAX C does */
  26 #define VMS
  27 #endif /* VMS */
  28 /* Note that this file is used indirectly via vms4-0.h, or some other
  29    such file.  These other files define a symbol VMS4_0, VMS4_2, etc.  */
  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 "vax-vms"
  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 /* INTERRUPT_INPUT controls a default for Unix systems.
  43    VMS uses a separate mechanism.  */
  44
  45 /* #define INTERRUPT_INPUT */
  46
  47 /* Letter to use in finding device name of first pty,
  48   if system supports pty's.  'a' means it is /dev/ptya0  */
  49
  50 #define FIRST_PTY_LETTER 'a'
  51
  52 /*
  53  *      Define HAVE_PTYS if the system supports pty devices.
  54  */
  55
  56 /* #define HAVE_PTYS */
  57
  58 /* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */
  59
  60 /* #define HAVE_SOCKETS */
  61
  62 /*
  63  *      Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
  64  *      The 4.2 opendir, etc., library functions.
  65  */
  66
  67 #define NONSYSTEM_DIR_LIBRARY
  68
  69 /* Define this symbol if your system has the functions bcopy, etc. */
  70
  71 /* #define BSTRING */
  72
  73 /* subprocesses should be defined if you want to
  74    have code for asynchronous subprocesses
  75    (as used in M-x compile and M-x shell).
  76    This is generally OS dependent, and not supported
  77    under most USG systems. */
  78
  79 #define subprocesses
  80
  81 /* If your system uses COFF (Common Object File Format) then define the
  82    preprocessor symbol "COFF". */
  83
  84 /* #define COFF */
  85
  86 /* define MAIL_USE_FLOCK if the mailer uses flock
  87    to interlock access to /usr/spool/mail/$USER.
  88    The alternative is that a lock file named
  89    /usr/spool/mail/$USER.lock.  */
  90
  91 /* #define MAIL_USE_FLOCK */
  92
  93 /* Define CLASH_DETECTION if you want lock files to be written
  94    so that Emacs can tell instantly when you try to modify
  95    a file that someone else has modified in his Emacs.  */
  96
  97 /* #define CLASH_DETECTION */
  98
  99 /* Define the maximum record length for print strings, if needed. */
 100
 101 #define MAX_PRINT_CHARS 300
 102
 103 \f
 104 /* Here, on a separate page, add any special hacks needed
 105    to make Emacs work on this system.  For example,
 106    you might define certain system call names that don't
 107    exist on your system, or that do different things on
 108    your system and must be used only through an encapsulation
 109    (Which you should place, by convention, in sysdep.c).  */
 110
 111 /* Do you have the shareable library bug?  If you link with a shareable
 112    library that contains psects with the NOSHR attribute and also refer to
 113    those psects in your program, the linker give you a private version of
 114    the psect which is not related to the version used by the shareable
 115    library.  The end result is that your references to variables in that
 116    psect have absolutely nothing to do with library references to what is
 117    supposed to be the same variable.  If you intend to link with the standard
 118    C library (NOT the shareable one) you don't need to define this.  (This
 119    is NOT fixed in V4.4...) */
 120
 121 #define SHAREABLE_LIB_BUG
 122
 123 /* Partially due to the above mentioned bug and also so that we don't need
 124    to require that people have a shareable C library, the default for Emacs
 125    is to link with the non-shared library.  If you want to link with the
 126    shared library, define this and remake xmakefile and fileio.c. This allows
 127    us to ship a guaranteed executable image. */
 128
 129 #define LINK_CRTL_SHARE
 130
 131 /* Define this if you want to read the file SYS$SYSTEM:SYSUAF.DAT for user
 132    information.  If you do use this, you must either make SYSUAF.DAT world
 133    readable or install Emacs with SYSPRV.  */
 134
 135 /* #define READ_SYSUAF */
 136
 137 /* On VMS these have a different name */
 138
 139 #define index strchr
 140 #define rindex strrchr
 141 #define unlink delete
 142
 143 #ifndef _GNUC_
 144 extern double mth$dmod(double, double);
 145 #define drem mth$dmod
 146 #endif
 147
 148 /* Some time rountines are missing in the VAX C RTL, or needs some
 149    extra bit of code */
 150 #define tzset sys_tzset
 151 #define localtime sys_localtime
 152 #define gmtime sys_gmtime
 153
 154 /* On later versions of VMS these exist in the C run time library, but
 155    we are using our own implementations.  Hide their names to avoid
 156    linker errors */
 157 #define rename sys_rename
 158 #define execvp sys_execvp
 159 #define system sys_system
 160
 161 #ifndef GNU_MALLOC
 162 /* Hide these names so that we don't get linker errors */
 163 #define malloc sys_malloc
 164 #define free sys_free
 165 #define realloc sys_realloc
 166 #define calloc sys_calloc
 167
 168 /* Don't use the standard brk and sbrk */
 169 #define sbrk sys_sbrk
 170 #define brk sys_brk
 171 #endif
 172
 173 /* On VMS we want to avoid reading and writing very large amounts of
 174    data at once, so we redefine read and write here. */
 175
 176 #define read sys_read
 177 #define write sys_write
 178
 179 /* sys_creat just calls the real creat with additional args of
 180    "rfm=var", "rat=cr" to get "normal" VMS files... */
 181 #define creat sys_creat
 182
 183 /* fwrite forces an RMS PUT on every call.  This is abysmally slow, so
 184    we emulate fwrite with fputc, which forces buffering and is much
 185    faster! */
 186 #define fwrite sys_fwrite
 187
 188 /* getuid only returns the member number, which is not unique on most VMS
 189    systems.  We emulate it with (getgid()<<16 | getuid()). */
 190 #define getuid sys_getuid
 191
 192 /* If user asks for TERM, check first for EMACS_TERM.  */
 193 #define getenv sys_getenv
 194
 195 /* Standard C abort is less useful than it should be. */
 196 #define abort sys_abort
 197
 198 /* Case conflicts with C library fread. */
 199 #define Fread F_read
 200
 201 /* Case conflicts with C library srandom. */
 202 #define Srandom S_random
 203
 204 /* variable length too long... maybe */
 205 #if 0
 206 #define do_line_insertion_deletion_costs do_line_insertion_deletion_cost
 207 #endif
 208
 209 /* Cause initialization of vmsfns.c to be run.  */
 210 #define SYMS_SYSTEM syms_of_vmsfns ()
 211
 212 /* VAXCRTL access doesn't deal with SYSPRV very well (among other oddites...)
 213    Here, we use $CHKPRO to really determine access. */
 214 #define access sys_access
 215
 216 #define PAGESIZE        512
 217
 218 #define _longjmp        longjmp
 219 #define _setjmp         setjmp
 220
 221 globalref char sdata[];
 222 #define DATA_START (((int) sdata + 511) & ~511)
 223 #define TEXT_START 512
 224
 225 /* Baud-rate values from tty status are not standard.  */
 226
 227 #define BAUD_CONVERT  \
 228 { 0, 50, 75, 110, 134, 150, 300, 600, 1200, 1800, \
 229   2000, 2400, 3600, 4800, 7200, 9600, 19200 }
 230
 231 #define PURESIZE 330000
 232
 233 /* Stdio FILE type has extra indirect on VMS, so must alter this macro.  */
 234
 235 #define PENDING_OUTPUT_COUNT(FILE) ((*(FILE))->_ptr - (*(FILE))->_base)
 236
 237 #define NULL_DEVICE "NLA0:"
 238
 239 #define TERMCAP_NAME "emacs_library:[etc]termcap.dat"
 240
 241 #define EXEC_SUFFIXES ".exe:.com"
 242
 243 /* Case conflict with Xlib XFree () */
 244 #define xfree emacs_xfree
 245
 246 /* What separator do we use in paths?  */
 247 #define SEPCHAR ','