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, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 /* This file written by James Van Artsdalen of Dell Computer Corporation.
  22  * james@bigtex.cactus.org.  Subsequently improved for Dell 2.2 by Eric
  23  * S. Raymond <esr@snark.thyrsus.com>.
  24  */
  25
  26 /* Use the SysVr3 file for at least base configuration. */
  27
  28 #include "usg5-3.h"
  29
  30 #define USG5_4
  31
  32 /* We do have multiple jobs.  Handle ^Z. */
  33
  34 #undef NOMULTIPLEJOBS
  35
  36 #define LIBS_SYSTEM -lsocket -lnsl -lelf
  37 #define ORDINARY_LINK
  38
  39 #if 0
  40 #ifdef ORDINARY_LINK
  41 #define LIB_STANDARD -lc /usr/ucblib/libucb.a
  42 #else
  43 #define START_FILES pre-crt0.o /usr/ccs/lib/crt1.o /usr/ccs/lib/crti.o /usr/ccs/lib/values-Xt.o
  44 #define LIB_STANDARD -lc /usr/ucblib/libucb.a /usr/ccs/lib/crtn.o
  45 #endif
  46 #else
  47
  48 #ifdef ORDINARY_LINK
  49 #define LIB_STANDARD
  50 #else
  51 #define START_FILES pre-crt0.o /usr/ccs/lib/crt1.o /usr/ccs/lib/crti.o /usr/ccs/lib/values-Xt.o
  52 #define LIB_STANDARD -lc /usr/ccs/lib/crtn.o
  53 #endif
  54 #endif
  55
  56 /* there are no -lg libraries on this system, and no libPW */
  57
  58 #define LIBS_DEBUG
  59 /* This is turned off because nobody actually uses LIBS_STANDARD (Nov 1995).
  60    That name is a typo.  The next step is to delete this entirely.  */
  61 /* #define LIBS_STANDARD -lc */
  62
  63 /* No <sioctl.h> */
  64
  65 #define NO_SIOCTL_H
  66
  67 /* Undump with ELF */
  68
  69 #undef COFF
  70
  71 #define UNEXEC unexelf.o
  72
  73 /* <sys/stat.h> *defines* stat(2) as a static function.  If "static"
  74  * is blank, then many files will have a public definition for stat(2).
  75  */
  76
  77 #undef static
  78
  79 /* Get FIONREAD from <sys/filio.h>.  Get <sys/ttold.h> to get struct
  80  * tchars. But get <termio.h> first to make sure ttold.h doesn't
  81  * interfere.  And don't try to use SIGIO yet.
  82  */
  83
  84 #ifndef NOT_C_CODE
  85 #include <sys/wait.h>
  86 #endif
  87
  88 #ifdef emacs
  89 #ifndef NO_FILIO_H
  90 #include <sys/filio.h>
  91 #endif
  92 #include <termio.h>
  93 #include <sys/ttold.h>
  94 #include <signal.h>
  95 #include <sys/stream.h>
  96 #include <sys/stropts.h>
  97 #include <sys/termios.h>
  98 #undef SIGIO
  99 #endif
 100
 101 /* Some SVr4s don't define NSIG in sys/signal.h for ANSI environments;
 102  * instead, there's a system variable _sys_nsig.  Unfortunately, we need the
 103  * constant to dimension an array.  So wire in the appropriate value here.
 104  */
 105
 106 #ifndef NSIG
 107 #define NSIG    32
 108 #endif
 109
 110 /* We need bss_end from emacs.c for undumping */
 111
 112 #ifndef USG_SHARED_LIBRARIES
 113 #define USG_SHARED_LIBRARIES
 114 #endif
 115
 116 /* We can support this */
 117
 118 #define CLASH_DETECTION
 119
 120 #define HAVE_PTYS
 121 #define HAVE_TERMIOS
 122 #undef BROKEN_TIOCGWINSZ
 123 #undef BROKEN_TIOCGETC
 124
 125 /* It is possible to receive SIGCHLD when there are no children
 126    waiting, because a previous waitsys(2) cleaned up the carcass of child
 127    without clearing the SIGCHLD pending info.  So, use a non-blocking
 128    wait3 instead, which maps to waitpid(2) in SysVr4. */
 129
 130 #define HAVE_WAIT_HEADER
 131 #define WAITTYPE int
 132 #define wait3(status, options, rusage) \
 133   waitpid ((pid_t) -1, (status), (options))
 134 #define WRETCODE(w) (w >> 8)
 135
 136 /* TIOCGPGRP is broken in SysVr4, so we can't send signals to PTY
 137    subprocesses the usual way.  But TIOCSIGNAL does work for PTYs, and
 138    this is all we need.  */
 139
 140 #ifndef IRIX6
 141 #define TIOCSIGSEND TIOCSIGNAL
 142 #endif
 143
 144 /* This change means that we don't loop through allocate_pty too many
 145    times in the (rare) event of a failure. */
 146
 147 #undef FIRST_PTY_LETTER
 148 #define FIRST_PTY_LETTER 'z'
 149
 150 /* This sets the name of the master side of the PTY. */
 151
 152 #define PTY_NAME_SPRINTF strcpy (pty_name, "/dev/ptmx");
 153
 154 /* This sets the name of the slave side of the PTY.  On SysVr4,
 155    grantpt(3) forks a subprocess, so keep sigchld_handler() from
 156    intercepting that death.  If any child but grantpt's should die
 157    within, it should be caught after sigrelse(2). */
 158
 159 #define PTY_TTY_NAME_SPRINTF                            \
 160   {                                                     \
 161     char *ptsname (), *ptyname;                         \
 162                                                         \
 163     sighold (SIGCLD);                                   \
 164     if (grantpt (fd) == -1)                             \
 165       { close (fd); return -1; }                        \
 166     sigrelse (SIGCLD);                                  \
 167     if (unlockpt (fd) == -1)                            \
 168       { close (fd); return -1; }                        \
 169     if (!(ptyname = ptsname (fd)))                      \
 170       { close (fd); return -1; }                        \
 171     strncpy (pty_name, ptyname, sizeof (pty_name));     \
 172     pty_name[sizeof (pty_name) - 1] = 0;                \
 173   }
 174
 175 /* Push various streams modules onto a PTY channel. */
 176
 177 #define SETUP_SLAVE_PTY \
 178   if (ioctl (xforkin, I_PUSH, "ptem") == -1)    \
 179     fatal ("ioctl I_PUSH ptem", errno);         \
 180   if (ioctl (xforkin, I_PUSH, "ldterm") == -1)  \
 181     fatal ("ioctl I_PUSH ldterm", errno);       \
 182   if (ioctl (xforkin, I_PUSH, "ttcompat") == -1) \
 183     fatal ("ioctl I_PUSH ttcompat", errno);
 184
 185 /* Undo the SVr3 X11 library definition */
 186 #undef LIB_X11_LIB
 187
 188 /* The definition of this in s-usg5-3.h is not needed in 5.4.  */
 189 /* liblnsl_s should never be used.  The _s suffix implies a shared
 190    library, as opposed to a DLL.  Share libraries were used in SVR3, and are
 191    available only in order to allow SVR3 binaries to run.  They should not be
 192    linked in to new binaries. -- caraway!pinkas@caraway.intel.com.  */
 193 #undef LIBX10_SYSTEM
 194 #undef LIBX11_SYSTEM
 195
 196 /* Tell x11term.c and keyboard.c we have the system V streams feature.  */
 197 #define SYSV_STREAMS
 198
 199 /* This definition was suggested for next release.
 200    So give it a try.  */
 201 #define HAVE_SOCKETS
 202
 203 #ifndef IRIX6
 204 #define bcopy(src,dst,n)        memmove (dst,src,n)
 205 #define bcmp(src,dst,n)         memcmp (src,dst,n)
 206 #define bzero(s,n)              memset (s,0,n)
 207 #endif