src/s/vms.h

   1 /* system description header for VMS
   2    Copyright (C) 1986, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   3                  2008  Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software: you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation, either version 3 of the License, or
  10 (at your option) any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  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 /* In olden days, VMS filenames did not support hyphen (i.e., the "-"
 112    character).  You can #undef this in vmsX-Y.h for newer versions.  */
 113
 114 #define NO_HYPHENS_IN_FILENAMES
 115
 116 /* Do you have the sharable library bug?  If you link with a sharable
 117    library that contains psects with the NOSHR attribute and also refer to
 118    those psects in your program, the linker give you a private version of
 119    the psect which is not related to the version used by the sharable
 120    library.  The end result is that your references to variables in that
 121    psect have absolutely nothing to do with library references to what is
 122    supposed to be the same variable.  If you intend to link with the standard
 123    C library (NOT the sharable one) you don't need to define this.  (This
 124    is NOT fixed in V4.4...) */
 125
 126 #define SHARABLE_LIB_BUG
 127
 128 /* Partially due to the above mentioned bug and also so that we don't need
 129    to require that people have a sharable C library, the default for Emacs
 130    is to link with the non-shared library.  If you want to link with the
 131    shared library, define this and remake xmakefile and fileio.c. This allows
 132    us to ship a guaranteed executable image. */
 133
 134 #define LINK_CRTL_SHARE
 135
 136 /* Define this if you want to read the file SYS$SYSTEM:SYSUAF.DAT for user
 137    information.  If you do use this, you must either make SYSUAF.DAT world
 138    readable or install Emacs with SYSPRV.  */
 139
 140 /* #define READ_SYSUAF */
 141
 142 /* Traditionally, filenames on VMS are always upper case.  */
 143
 144 #define FILE_SYSTEM_CASE Fupcase
 145
 146 /* On VMS these have a different name */
 147
 148 #define index strchr
 149 #define rindex strrchr
 150 #define unlink delete
 151
 152 #ifndef __GNUC__
 153 extern double mth$dmod(double, double);
 154 #endif
 155
 156 /* Some time routines are missing in the VAX C RTL, or needs some
 157    extra bit of code */
 158 #define tzset sys_tzset
 159 #define localtime sys_localtime
 160 #define gmtime sys_gmtime
 161
 162 /* On later versions of VMS these exist in the C run time library, but
 163    we are using our own implementations.  Hide their names to avoid
 164    linker errors */
 165 #define rename sys_rename
 166 #define execvp sys_execvp
 167 #define system sys_system
 168
 169 #ifndef GNU_MALLOC
 170 /* Hide these names so that we don't get linker errors */
 171 #define malloc sys_malloc
 172 #define free sys_free
 173 #define realloc sys_realloc
 174 #define calloc sys_calloc
 175
 176 /* Don't use the standard brk and sbrk */
 177 #define sbrk sys_sbrk
 178 #define brk sys_brk
 179 #endif
 180
 181 /* On VMS we want to avoid reading and writing very large amounts of
 182    data at once, so we redefine read and write here. */
 183
 184 #define read sys_read
 185 #define write sys_write
 186
 187 /* sys_creat just calls the real creat with additional args of
 188    "rfm=var", "rat=cr" to get "normal" VMS files... */
 189 #define creat sys_creat
 190
 191 /* fwrite forces an RMS PUT on every call.  This is abysmally slow, so
 192    we emulate fwrite with fputc, which forces buffering and is much
 193    faster! */
 194 #define fwrite sys_fwrite
 195
 196 /* getuid only returns the member number, which is not unique on most VMS
 197    systems.  We emulate it with (getgid()<<16 | getuid()). */
 198 #define getuid sys_getuid
 199
 200 /* If user asks for TERM, check first for EMACS_TERM.  */
 201 #define getenv sys_getenv
 202
 203 /* Standard C abort is less useful than it should be. */
 204 #define abort sys_abort
 205
 206 /* Case conflicts with C library fread. */
 207 #define Fread F_read
 208
 209 /* Case conflicts with C library srandom. */
 210 #define Srandom S_random
 211
 212 /* Cause initialization of vmsfns.c to be run.  */
 213 #define SYMS_SYSTEM syms_of_vmsfns ()
 214
 215 /* VAXCRTL access doesn't deal with SYSPRV very well (among other oddities...)
 216    Here, we use $CHKPRO to really determine access. */
 217 #define access sys_access
 218
 219 #define PAGESIZE        512
 220
 221 #define _longjmp        longjmp
 222 #define _setjmp         setjmp
 223
 224 globalref char sdata[];
 225 #define DATA_START (((int) sdata + 511) & ~511)
 226 #define TEXT_START 512
 227
 228 /* Baud-rate values from tty status are not standard.  */
 229
 230 #define BAUD_CONVERT  \
 231 { 0, 50, 75, 110, 134, 150, 300, 600, 1200, 1800, \
 232   2000, 2400, 3600, 4800, 7200, 9600, 19200 }
 233
 234 #define PURESIZE 330000
 235
 236 /* Stdio FILE type has extra indirect on VMS, so must alter this macro.  */
 237
 238 #define PENDING_OUTPUT_COUNT(FILE) ((*(FILE))->_ptr - (*(FILE))->_base)
 239
 240 #define NULL_DEVICE "NLA0:"
 241
 242 /* Case conflict with Xlib XFree () */
 243 #define xfree emacs_xfree
 244
 245 /* What separator do we use in paths?  */
 246 #define SEPCHAR ','
 247
 248 /* arch-tag: 76bc2b70-46d1-4334-8f12-955c0d0ca6d4
 249    (do not change this comment) */