code.delx.au - gnu-emacs/blob - 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 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 /* 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 #include "usg5-3.h"
  28
  29 #define USG5_4
  30
  31 /* On most SVR4 systems, gettimeofday takes one arg
  32    and the compiler might crash.  */
  33 #define GETTIMEOFDAY_ONE_ARGUMENT
  34
  35 /* We do have multiple jobs.  Handle ^Z. */
  36
  37 #undef NOMULTIPLEJOBS
  38
  39 #define LIBS_SYSTEM -lsocket -lnsl -lelf
  40 #define ORDINARY_LINK
  41
  42 #if 0
  43 #ifdef ORDINARY_LINK
  44 #define LIB_STANDARD -lc /usr/ucblib/libucb.a
  45 #else
  46 #define START_FILES pre-crt0.o /usr/ccs/lib/crt1.o /usr/ccs/lib/crti.o /usr/ccs/lib/values-Xt.o
  47 #define LIB_STANDARD -lc /usr/ucblib/libucb.a /usr/ccs/lib/crtn.o
  48 #endif
  49 #else
  50
  51 #ifdef ORDINARY_LINK
  52 #define LIB_STANDARD
  53 #else
  54 #define START_FILES pre-crt0.o /usr/ccs/lib/crt1.o /usr/ccs/lib/crti.o /usr/ccs/lib/values-Xt.o
  55 #define LIB_STANDARD -lc /usr/ccs/lib/crtn.o
  56 #endif
  57 #endif
  58
  59 /* there are no -lg libraries on this system, and no libPW */
  60
  61 #define LIBS_DEBUG
  62 #define LIBS_STANDARD -lc
  63
  64 /* No <sioctl.h> */
  65
  66 #define NO_SIOCTL_H
  67
  68 /* Undump with ELF */
  69
  70 #undef COFF
  71
  72 #define UNEXEC unexelf.o
  73
  74 /* Get FIONREAD from <sys/filio.h>.  Get <sys/ttold.h> to get struct
  75  * tchars. But get <termio.h> first to make sure ttold.h doesn't
  76  * interfere.  And don't try to use SIGIO yet.
  77  */
  78
  79 #ifdef emacs
  80 #include <sys/filio.h>
  81 #include <termio.h>
  82 #include <sys/ttold.h>
  83 #include <signal.h>
  84 #include <sys/wait.h>
  85 #include <sys/stream.h>
  86 #include <sys/stropts.h>
  87 #include <sys/termios.h>
  88 #undef SIGIO
  89 #endif
  90
  91 /* Some SVr4s don't define NSIG in sys/signal.h for ANSI environments;
  92  * instead, there's a system variable _sys_nsig.  Unfortunately, we need the
  93  * constant to dimension an array.  So wire in the appropriate value here.
  94  */
  95
  96 #ifndef NSIG
  97 #define NSIG    32
  98 #endif
  99
 100 /* libc has this stuff, but not utimes. */
 101
 102 #define HAVE_SELECT
 103 #define HAVE_TIMEVAL
 104
 105 /* <sys/stat.h> *defines* stat(2) as a static function.  If "static"
 106  * is blank, then many files will have a public definition for stat(2).
 107  */
 108
 109 #undef static
 110
 111 /* We need bss_end from emacs.c for undumping */
 112
 113 #ifndef USG_SHARED_LIBRARIES
 114 #define USG_SHARED_LIBRARIES
 115 #endif
 116
 117 /* We can support this */
 118
 119 #define CLASH_DETECTION
 120
 121 #define HAVE_PTYS
 122 #define HAVE_TERMIOS
 123 #undef BROKEN_TIOCGWINSZ
 124 #undef BROKEN_TIOCGETC
 125
 126 /* It is possible to receive SIGCHLD when there are no children
 127    waiting, because a previous waitsys(2) cleaned up the carcass of child
 128    without clearing the SIGCHLD pending info.  So, use a non-blocking
 129    wait3 instead, which maps to waitpid(2) in SysVr4. */
 130
 131 #define HAVE_WAIT_HEADER
 132 #define WAITTYPE int
 133 #define wait3(status, options, rusage) \
 134   waitpid ((pid_t) -1, (status), (options))
 135 #define WRETCODE(w) (w >> 8)
 136
 137 /* TIOCGPGRP is broken in SysVr4, so we can't send signals to PTY
 138    subprocesses the usual way.  But TIOCSIGNAL does work for PTYs, and
 139    this is all we need.  */
 140
 141 #define TIOCSIGSEND TIOCSIGNAL
 142
 143 /* This change means that we don't loop through allocate_pty too many
 144    times in the (rare) event of a failure. */
 145
 146 #undef FIRST_PTY_LETTER
 147 #define FIRST_PTY_LETTER 'z'
 148
 149 /* This sets the name of the master side of the PTY. */
 150
 151 #define PTY_NAME_SPRINTF strcpy (pty_name, "/dev/ptmx");
 152
 153 /* This sets the name of the slave side of the PTY.  On SysVr4,
 154    grantpt(3) forks a subprocess, so keep sigchld_handler() from
 155    intercepting that death.  If any child but grantpt's should die
 156    within, it should be caught after sigrelse(2). */
 157
 158 #define PTY_TTY_NAME_SPRINTF                            \
 159   {                                                     \
 160     char *ptsname (), *ptyname;                         \
 161                                                         \
 162     sighold (SIGCLD);                                   \
 163     if (grantpt (fd) == -1)                             \
 164       { close (fd); return -1; }                        \
 165     sigrelse (SIGCLD);                                  \
 166     if (unlockpt (fd) == -1)                            \
 167       { close (fd); return -1; }                        \
 168     if (!(ptyname = ptsname (fd)))                      \
 169       { close (fd); return -1; }                        \
 170     strncpy (pty_name, ptyname, sizeof (pty_name));     \
 171     pty_name[sizeof (pty_name) - 1] = 0;                \
 172   }
 173
 174 /* Push various streams modules onto a PTY channel. */
 175
 176 #define SETUP_SLAVE_PTY \
 177   if (ioctl (xforkin, I_PUSH, "ptem") == -1)    \
 178     fatal ("ioctl I_PUSH ptem", errno);         \
 179   if (ioctl (xforkin, I_PUSH, "ldterm") == -1)  \
 180     fatal ("ioctl I_PUSH ldterm", errno);       \
 181   if (ioctl (xforkin, I_PUSH, "ttcompat") == -1) \
 182     fatal ("ioctl I_PUSH ttcompat", errno);
 183
 184 /* Undo the SVr3 X11 library definition */
 185 #undef LIB_X11_LIB
 186
 187 /* The definition of this in s-usg5-3.h is not needed in 5.4.  */
 188 /* liblnsl_s should never be used.  The _s suffix implies a shared
 189    library, as opposed to a DLL.  Share libraries were used in SVR3, and are
 190    available only in order to allow SVR3 binaries to run.  They should not be
 191    linked in to new binaries. -- caraway!pinkas@caraway.intel.com.  */
 192 #undef LIBX10_SYSTEM
 193 #undef LIBX11_SYSTEM
 194
 195 /* Tell x11term.c and keyboard.c we have the system V streams feature.  */
 196 #define SYSV_STREAMS
 197
 198 /* This definition was suggested for next release.
 199    So give it a try.  */
 200 #define HAVE_SOCKETS
 201
 202 #define bcopy(src,dst,n)        memmove (dst,src,n)
 203 #define bcmp(src,dst,n)         memcmp (src,dst,n)
 204 #define bzero(s,n)              memset (s,0,n)