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 /* We do have multiple jobs.  Handle ^Z. */
  32
  33 #undef NOMULTIPLEJOBS
  34
  35 #define LIBS_SYSTEM -lsocket -lnsl -lelf
  36 #define ORDINARY_LINK
  37
  38 #if 0
  39 #ifdef ORDINARY_LINK
  40 #define LIB_STANDARD -lc /usr/ucblib/libucb.a
  41 #else
  42 #define START_FILES pre-crt0.o /usr/ccs/lib/crt1.o /usr/ccs/lib/crti.o /usr/ccs/lib/values-Xt.o
  43 #define LIB_STANDARD -lc /usr/ucblib/libucb.a /usr/ccs/lib/crtn.o
  44 #endif
  45 #else
  46
  47 #ifdef ORDINARY_LINK
  48 #define LIB_STANDARD
  49 #else
  50 #define START_FILES pre-crt0.o /usr/ccs/lib/crt1.o /usr/ccs/lib/crti.o /usr/ccs/lib/values-Xt.o
  51 #define LIB_STANDARD -lc /usr/ccs/lib/crtn.o
  52 #endif
  53 #endif
  54
  55 /* there are no -lg libraries on this system, and no libPW */
  56
  57 #define LIBS_DEBUG
  58 /* This is turned off because nobody actually uses LIBS_STANDARD (Nov 1995).
  59    That name is a typo.  The next step is to delete this entirely.  */
  60 /* #define LIBS_STANDARD -lc */
  61
  62 /* No <sioctl.h> */
  63
  64 #define NO_SIOCTL_H
  65
  66 /* Undump with ELF */
  67
  68 #undef COFF
  69
  70 #define UNEXEC unexelf.o
  71
  72 /* <sys/stat.h> *defines* stat(2) as a static function.  If "static"
  73  * is blank, then many files will have a public definition for stat(2).
  74  */
  75
  76 #undef static
  77
  78 /* Get FIONREAD from <sys/filio.h>.  Get <sys/ttold.h> to get struct
  79  * tchars. But get <termio.h> first to make sure ttold.h doesn't
  80  * interfere.  And don't try to use SIGIO yet.
  81  */
  82
  83 #ifndef NOT_C_CODE
  84 #include <sys/wait.h>
  85 #endif
  86
  87 #ifdef emacs
  88 #include <sys/filio.h>
  89 #include <termio.h>
  90 #include <sys/ttold.h>
  91 #include <signal.h>
  92 #include <sys/stream.h>
  93 #include <sys/stropts.h>
  94 #include <sys/termios.h>
  95 #undef SIGIO
  96 #endif
  97
  98 /* Some SVr4s don't define NSIG in sys/signal.h for ANSI environments;
  99  * instead, there's a system variable _sys_nsig.  Unfortunately, we need the
 100  * constant to dimension an array.  So wire in the appropriate value here.
 101  */
 102
 103 #ifndef NSIG
 104 #define NSIG    32
 105 #endif
 106
 107 /* We need bss_end from emacs.c for undumping */
 108
 109 #ifndef USG_SHARED_LIBRARIES
 110 #define USG_SHARED_LIBRARIES
 111 #endif
 112
 113 /* We can support this */
 114
 115 #define CLASH_DETECTION
 116
 117 #define HAVE_PTYS
 118 #define HAVE_TERMIOS
 119 #undef BROKEN_TIOCGWINSZ
 120 #undef BROKEN_TIOCGETC
 121
 122 /* It is possible to receive SIGCHLD when there are no children
 123    waiting, because a previous waitsys(2) cleaned up the carcass of child
 124    without clearing the SIGCHLD pending info.  So, use a non-blocking
 125    wait3 instead, which maps to waitpid(2) in SysVr4. */
 126
 127 #define HAVE_WAIT_HEADER
 128 #define WAITTYPE int
 129 #define wait3(status, options, rusage) \
 130   waitpid ((pid_t) -1, (status), (options))
 131 #define WRETCODE(w) (w >> 8)
 132
 133 /* TIOCGPGRP is broken in SysVr4, so we can't send signals to PTY
 134    subprocesses the usual way.  But TIOCSIGNAL does work for PTYs, and
 135    this is all we need.  */
 136
 137 #define TIOCSIGSEND TIOCSIGNAL
 138
 139 /* This change means that we don't loop through allocate_pty too many
 140    times in the (rare) event of a failure. */
 141
 142 #undef FIRST_PTY_LETTER
 143 #define FIRST_PTY_LETTER 'z'
 144
 145 /* This sets the name of the master side of the PTY. */
 146
 147 #define PTY_NAME_SPRINTF strcpy (pty_name, "/dev/ptmx");
 148
 149 /* This sets the name of the slave side of the PTY.  On SysVr4,
 150    grantpt(3) forks a subprocess, so keep sigchld_handler() from
 151    intercepting that death.  If any child but grantpt's should die
 152    within, it should be caught after sigrelse(2). */
 153
 154 #define PTY_TTY_NAME_SPRINTF                            \
 155   {                                                     \
 156     char *ptsname (), *ptyname;                         \
 157                                                         \
 158     sighold (SIGCLD);                                   \
 159     if (grantpt (fd) == -1)                             \
 160       { close (fd); return -1; }                        \
 161     sigrelse (SIGCLD);                                  \
 162     if (unlockpt (fd) == -1)                            \
 163       { close (fd); return -1; }                        \
 164     if (!(ptyname = ptsname (fd)))                      \
 165       { close (fd); return -1; }                        \
 166     strncpy (pty_name, ptyname, sizeof (pty_name));     \
 167     pty_name[sizeof (pty_name) - 1] = 0;                \
 168   }
 169
 170 /* Push various streams modules onto a PTY channel. */
 171
 172 #define SETUP_SLAVE_PTY \
 173   if (ioctl (xforkin, I_PUSH, "ptem") == -1)    \
 174     fatal ("ioctl I_PUSH ptem", errno);         \
 175   if (ioctl (xforkin, I_PUSH, "ldterm") == -1)  \
 176     fatal ("ioctl I_PUSH ldterm", errno);       \
 177   if (ioctl (xforkin, I_PUSH, "ttcompat") == -1) \
 178     fatal ("ioctl I_PUSH ttcompat", errno);
 179
 180 /* Undo the SVr3 X11 library definition */
 181 #undef LIB_X11_LIB
 182
 183 /* The definition of this in s-usg5-3.h is not needed in 5.4.  */
 184 /* liblnsl_s should never be used.  The _s suffix implies a shared
 185    library, as opposed to a DLL.  Share libraries were used in SVR3, and are
 186    available only in order to allow SVR3 binaries to run.  They should not be
 187    linked in to new binaries. -- caraway!pinkas@caraway.intel.com.  */
 188 #undef LIBX10_SYSTEM
 189 #undef LIBX11_SYSTEM
 190
 191 /* Tell x11term.c and keyboard.c we have the system V streams feature.  */
 192 #define SYSV_STREAMS
 193
 194 /* This definition was suggested for next release.
 195    So give it a try.  */
 196 #define HAVE_SOCKETS
 197
 198 #define bcopy(src,dst,n)        memmove (dst,src,n)
 199 #define bcmp(src,dst,n)         memcmp (src,dst,n)
 200 #define bzero(s,n)              memset (s,0,n)