src/s/usg5-4.h

   1 /* Definitions file for GNU Emacs running on AT&T's System V Release 4
   2    Copyright (C) 1987, 1990, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
   3                  2006, 2007, 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 /* This file written by James Van Artsdalen of Dell Computer Corporation.
  21  * james@bigtex.cactus.org.  Subsequently improved for Dell 2.2 by Eric
  22  * S. Raymond <esr@snark.thyrsus.com>.
  23  */
  24
  25 /* Use the SysVr3 file for at least base configuration. */
  26
  27 #define USG                             /* System III, System V, etc */
  28
  29 #define USG5
  30 #define USG5_4
  31
  32 /* SYSTEM_TYPE should indicate the kind of system you are using.
  33  It sets the Lisp variable system-type.  */
  34
  35 #define SYSTEM_TYPE "usg-unix-v"
  36
  37 /* Default is to set interrupt_input to 0: don't do input buffering within Emacs */
  38
  39 /* #define INTERRUPT_INPUT */
  40
  41 /*
  42  *      Define HAVE_TERMIO if the system provides sysV-style ioctls
  43  *      for terminal control.
  44  */
  45
  46 #define HAVE_TERMIO
  47
  48 /*
  49  *      Define HAVE_PTYS if the system supports pty devices.
  50  */
  51
  52 /* Some versions of V.3 have this, but not all.
  53    #define HAVE_PTYS
  54    #define SYSV_PTYS  */
  55
  56 /* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */
  57
  58 /* #define HAVE_SOCKETS */
  59
  60 /*
  61  *      Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
  62  *      The 4.2 opendir, etc., library functions.
  63  */
  64
  65 /* #define NONSYSTEM_DIR_LIBRARY */
  66
  67 /*
  68  *      Define SYSV_SYSTEM_DIR to use the V.3 getdents/readir
  69  *      library functions.  Almost, but not quite the same as
  70  *      the 4.2 functions
  71  */
  72 #define SYSV_SYSTEM_DIR
  73
  74 /* Define this symbol if your system has the functions bcopy, etc. */
  75
  76 /* #define BSTRING */
  77
  78 /* subprocesses should be defined if you want to
  79  have code for asynchronous subprocesses
  80  (as used in M-x compile and M-x shell).
  81  This is supposed to work now on system V release 2.  */
  82
  83 #define subprocesses
  84
  85 /* If your system uses COFF (Common Object File Format) then define the
  86    preprocessor symbol "COFF". */
  87
  88 #define COFF
  89
  90 /* define MAIL_USE_FLOCK if the mailer uses flock
  91    to interlock access to /usr/spool/mail/$USER.
  92    The alternative is that a lock file named
  93    /usr/spool/mail/$USER.lock.  */
  94
  95 /* #define MAIL_USE_FLOCK */
  96
  97 /* Define CLASH_DETECTION if you want lock files to be written
  98    so that Emacs can tell instantly when you try to modify
  99    a file that someone else has modified in his Emacs.  */
 100
 101 /* #define CLASH_DETECTION */
 102
 103 /* The file containing the kernel's symbol table is called /unix.  */
 104
 105 #define KERNEL_FILE "/unix"
 106
 107 /* The symbol in the kernel where the load average is found
 108    is named avenrun.  */
 109
 110 #define LDAV_SYMBOL "avenrun"
 111
 112 /* Define this if system V IPC is available.  */
 113
 114 #define HAVE_SYSVIPC
 115
 116 /* Special hacks needed to make Emacs run on this system.  */
 117
 118 /*
 119  *      Make the sigsetmask function go away.  Don't know what the
 120  *      ramifications of this are, but doesn't seem possible to
 121  *      emulate it properly anyway at this point.
 122  */
 123
 124 #define sigsetmask(mask)        /* Null expansion */
 125
 126 /* setjmp and longjmp can safely replace _setjmp and _longjmp,
 127    but they will run slower.  */
 128
 129 #define _setjmp setjmp
 130 #define _longjmp longjmp
 131
 132 /* On USG systems these have different names */
 133 #ifndef HAVE_INDEX
 134 #define index strchr
 135 #endif /* ! defined (HAVE_INDEX) */
 136 #ifndef HAVE_RINDEX
 137 #define rindex strrchr
 138 #endif /* ! defined (HAVE_RINDEX) */
 139
 140 /* USG systems tend to put everything declared static
 141    into the initialized data area, which becomes pure after dumping Emacs.
 142    Foil this.  Emacs carefully avoids static vars inside functions.  */
 143
 144 #define static
 145
 146 /* Compiler bug bites on many systems when default ADDR_CORRECT is used.  */
 147
 148 #define ADDR_CORRECT(x) (x)
 149
 150 /* Use terminfo instead of termcap.  */
 151
 152 #define TERMINFO
 153
 154
 155 /* The docs for system V/386 suggest v.3 has sigpause,
 156    so let's give it a try.  */
 157 #define HAVE_SYSV_SIGPAUSE
 158
 159
 160 /* If we're using the System V X port, BSD bstring functions will be handy */
 161
 162 #ifdef HAVE_X_WINDOWS
 163 #define BSTRING
 164 #endif /* HAVE_X_WINDOWS */
 165
 166 /* Enable support for shared libraries in unexec.  */
 167
 168 #define USG_SHARED_LIBRARIES
 169
 170 /* On USG systems signal handlers return void */
 171
 172 #define SIGTYPE void
 173
 174 #define START_FILES pre-crt0.o /usr/ccs/lib/crt1.o /usr/ccs/lib/crti.o /usr/ccs/lib/values-Xt.o
 175 #define LIB_STANDARD -lc /usr/ccs/lib/crtn.o
 176
 177 /* there are no -lg libraries on this system, and no libPW */
 178
 179 #define LIBS_DEBUG
 180
 181 /* Undump with ELF */
 182
 183 #undef COFF
 184
 185 #define UNEXEC unexelf.o
 186
 187 /* <sys/stat.h> *defines* stat(2) as a static function.  If "static"
 188  * is blank, then many files will have a public definition for stat(2).
 189  */
 190
 191 #undef static
 192
 193 /* Get FIONREAD from <sys/filio.h>.  Get <sys/ttold.h> to get struct
 194  * tchars. But get <termio.h> first to make sure ttold.h doesn't
 195  * interfere.  And don't try to use SIGIO yet.
 196  */
 197
 198 #ifndef NOT_C_CODE
 199 #include <sys/wait.h>
 200 #endif
 201
 202 #ifdef emacs
 203 #ifndef NO_FILIO_H
 204 #include <sys/filio.h>
 205 #endif
 206 #include <termio.h>
 207 #include <sys/ttold.h>
 208 #include <signal.h>
 209 #include <sys/stream.h>
 210 #include <sys/stropts.h>
 211 #include <sys/termios.h>
 212 #define BROKEN_SIGIO
 213 #endif
 214
 215 /* Some SVr4s don't define NSIG in sys/signal.h for ANSI environments;
 216  * instead, there's a system variable _sys_nsig.  Unfortunately, we need the
 217  * constant to dimension an array.  So wire in the appropriate value here.
 218  */
 219 #define NSIG_MINIMUM 32
 220
 221 /* We need bss_end from emacs.c for undumping */
 222
 223 #ifndef USG_SHARED_LIBRARIES
 224 #define USG_SHARED_LIBRARIES
 225 #endif
 226
 227 /* We can support this */
 228
 229 #define CLASH_DETECTION
 230
 231 #define HAVE_PTYS
 232 #define HAVE_TERMIOS
 233
 234 /* It is possible to receive SIGCHLD when there are no children
 235    waiting, because a previous waitsys(2) cleaned up the carcass of child
 236    without clearing the SIGCHLD pending info.  So, use a non-blocking
 237    wait3 instead, which maps to waitpid(2) in SysVr4. */
 238
 239 #define HAVE_WAIT_HEADER
 240 #define WAITTYPE int
 241 #define wait3(status, options, rusage) \
 242   waitpid ((pid_t) -1, (status), (options))
 243 #define WRETCODE(w) (w >> 8)
 244
 245 /* TIOCGPGRP is broken in SysVr4, so we can't send signals to PTY
 246    subprocesses the usual way.  But TIOCSIGNAL does work for PTYs, and
 247    this is all we need.  */
 248
 249 #define TIOCSIGSEND TIOCSIGNAL
 250
 251 /* This change means that we don't loop through allocate_pty too many
 252    times in the (rare) event of a failure. */
 253
 254 #define FIRST_PTY_LETTER 'z'
 255
 256 /* This sets the name of the master side of the PTY. */
 257
 258 #define PTY_NAME_SPRINTF strcpy (pty_name, "/dev/ptmx");
 259
 260 /* This sets the name of the slave side of the PTY.  On SysVr4,
 261    grantpt(3) forks a subprocess, so keep sigchld_handler() from
 262    intercepting that death.  If any child but grantpt's should die
 263    within, it should be caught after sigrelse(2). */
 264
 265 #define PTY_TTY_NAME_SPRINTF                            \
 266   {                                                     \
 267     char *ptsname (), *ptyname;                         \
 268                                                         \
 269     sighold (SIGCLD);                                   \
 270     if (grantpt (fd) == -1)                             \
 271       { emacs_close (fd); return -1; }                  \
 272     sigrelse (SIGCLD);                                  \
 273     if (unlockpt (fd) == -1)                            \
 274       { emacs_close (fd); return -1; }                  \
 275     if (!(ptyname = ptsname (fd)))                      \
 276       { emacs_close (fd); return -1; }                  \
 277     strncpy (pty_name, ptyname, sizeof (pty_name));     \
 278     pty_name[sizeof (pty_name) - 1] = 0;                \
 279   }
 280
 281 /* Push various streams modules onto a PTY channel. */
 282
 283 #define SETUP_SLAVE_PTY \
 284   if (ioctl (xforkin, I_PUSH, "ptem") == -1)    \
 285     fatal ("ioctl I_PUSH ptem", errno);         \
 286   if (ioctl (xforkin, I_PUSH, "ldterm") == -1)  \
 287     fatal ("ioctl I_PUSH ldterm", errno);       \
 288   if (ioctl (xforkin, I_PUSH, "ttcompat") == -1) \
 289     fatal ("ioctl I_PUSH ttcompat", errno);
 290
 291 /* Tell x11term.c and keyboard.c we have the system V streams feature.  */
 292 #define SYSV_STREAMS
 293
 294 /* This definition was suggested for next release.
 295    So give it a try.  */
 296 #define HAVE_SOCKETS
 297
 298 /* Markus Weiand <weiand@khof.com> says this is needed for Motif on
 299    SINIX.  */
 300 #define LIBS_SYSTEM -lgen
 301
 302 /* arch-tag: 1a0ed909-5faa-434b-b7c3-9d86c63d53a6
 303    (do not change this comment) */