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 1, 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 #ifdef ORDINARY_LINK
  39 #define LIB_STANDARD -lc /usr/ucblib/libucb.a
  40 #else
  41 #define START_FILES pre-crt0.o /usr/ccs/lib/crt1.o /usr/ccs/lib/crti.o /usr/ccs/lib/values-Xt.o
  42 #define LIB_STANDARD -lc /usr/ucblib/libucb.a /usr/ccs/lib/crtn.o
  43 #endif
  44
  45 /* there are no -lg libraries on this system, and no libPW */
  46
  47 #define LIBS_DEBUG
  48 #define LIBS_STANDARD -lc
  49
  50 /* No <sioctl.h> */
  51
  52 #define NO_SIOCTL_H
  53
  54 /* Undump with ELF */
  55
  56 #undef COFF
  57
  58 #define UNEXEC unexelf.o
  59
  60 /* Get FIONREAD from <sys/filio.h>.  Get <sys/ttold.h> to get struct
  61  * tchars. But get <termio.h> first to make sure ttold.h doesn't
  62  * interfere.  And don't try to use SIGIO yet.
  63  */
  64
  65 #ifdef emacs
  66 #include <sys/filio.h>
  67 #include <termio.h>
  68 #include <sys/ttold.h>
  69 #include <signal.h>
  70 #include <sys/wait.h>
  71 #include <sys/stream.h>
  72 #include <sys/stropts.h>
  73 #include <sys/termios.h>
  74 #undef SIGIO
  75 #endif
  76
  77 /* Some SVr4s don't define NSIG in sys/signal.h for ANSI environments;
  78  * instead, there's a system variable _sys_nsig.  Unfortunately, we need the
  79  * constant to dimension an array.  So wire in the appropriate value here.
  80  */
  81
  82 #ifndef NSIG
  83 #define NSIG    32
  84 #endif
  85
  86 /* libc has this stuff, but not utimes. */
  87
  88 #define HAVE_RENAME
  89 #define HAVE_SELECT
  90 #define HAVE_TIMEVAL
  91 #define HAVE_CLOSEDIR
  92 #define HAVE_GETTIMEOFDAY
  93 #define HAVE_DUP2
  94
  95 /* <sys/stat.h> *defines* stat(2) as a static function.  If "static"
  96  * is blank, then many files will have a public definition for stat(2).
  97  */
  98
  99 #undef static
 100
 101 /* We need bss_end from emacs.c for undumping */
 102
 103 #ifndef USG_SHARED_LIBRARIES
 104 #define USG_SHARED_LIBRARIES
 105 #endif
 106
 107 /* We can support this */
 108
 109 #define CLASH_DETECTION
 110
 111 #define HAVE_PTYS
 112 #define HAVE_SETSID
 113 #define HAVE_TERMIOS
 114
 115 /* It is possible to receive SIGCHLD when there are no children
 116    waiting, because a previous waitsys(2) cleaned up the carcass of child
 117    without clearing the SIGCHLD pending info.  So, use a non-blocking
 118    wait3 instead, which maps to waitpid(2) in SysVr4. */
 119
 120 #define HAVE_WAIT_HEADER
 121 #define WAITTYPE int
 122 #define wait3(status, options, rusage) \
 123   waitpid((pid_t) -1, (status), (options))
 124 #define WRETCODE(w) (w >> 8)
 125
 126 /* TIOCGPGRP is broken in SysVr4, so we can't send signals to PTY
 127    subprocesses the usual way.  But TIOCSIGNAL does work for PTYs, and
 128    this is all we need.  */
 129
 130 #define TIOCSIGSEND TIOCSIGNAL
 131
 132 /* This change means that we don't loop through allocate_pty too many
 133    times in the (rare) event of a failure. */
 134
 135 #undef FIRST_PTY_LETTER
 136 #define FIRST_PTY_LETTER 'z'
 137
 138 /* This sets the name of the master side of the PTY. */
 139
 140 #define PTY_NAME_SPRINTF strcpy (pty_name, "/dev/ptmx");
 141
 142 /* This sets the name of the slave side of the PTY.  On SysVr4,
 143    grantpt(3) forks a subprocess, so keep sigchld_handler() from
 144    intercepting that death.  If any child but grantpt's should die
 145    within, it should be caught after sigrelse(2). */
 146
 147 #define PTY_TTY_NAME_SPRINTF                    \
 148   {                                             \
 149     char *ptsname(), *ptyname;                  \
 150                                                 \
 151     sighold(SIGCLD);                            \
 152     if (grantpt(fd) == -1)                      \
 153       fatal("could not grant slave pty");       \
 154     sigrelse(SIGCLD);                           \
 155     if (unlockpt(fd) == -1)                     \
 156       fatal("could not unlock slave pty");      \
 157     if (!(ptyname = ptsname(fd)))               \
 158       fatal ("could not enable slave pty");     \
 159     strncpy(pty_name, ptyname, sizeof(pty_name)); \
 160     pty_name[sizeof(pty_name) - 1] = 0;         \
 161   }
 162
 163 /* Push various streams modules onto a PTY channel. */
 164
 165 #define SETUP_SLAVE_PTY \
 166   if (ioctl (xforkin, I_PUSH, "ptem") == -1)    \
 167     fatal ("ioctl I_PUSH ptem", errno);         \
 168   if (ioctl (xforkin, I_PUSH, "ldterm") == -1)  \
 169     fatal ("ioctl I_PUSH ldterm", errno);       \
 170   if (ioctl (xforkin, I_PUSH, "ttcompat") == -1) \
 171     fatal ("ioctl I_PUSH ttcompat", errno);
 172
 173 /* Undo the SVr3 X11 library definition */
 174 #undef LIB_X11_LIB -lX11
 175
 176 /* The definition of this in s-usg5-3.h is not needed in 5.4.  */
 177 /* liblnsl_s should never be used.  The _s suffix implies a shared
 178    library, as opposed to a DLL.  Share libraries were used in SVR3, and are
 179    available only in order to allow SVR3 binaries to run.  They should not be
 180    linked in to new binaries. -- caraway!pinkas@caraway.intel.com.  */
 181 #undef LIBX10_SYSTEM
 182 #undef LIBX11_SYSTEM
 183
 184 /* Tell x11term.c and keyboard.c we have the system V streams feature.  */
 185 #define SYSV_STREAMS
 186
 187 /* This definition was suggested for next release.
 188    So give it a try.  */
 189 #define HAVE_SOCKETS