s-usg5-4.h

早期freebsd实现

/* Definitions file for GNU Emacs running on AT&T's System V Release 4
   Copyright (C) 1987, 1990 Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 1, or (at your option)
any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */

/* This file written by James Van Artsdalen of Dell Computer Corporation.
 * [e-mail].
 */

/* Use the SysVr3 file for at least base configuration. */

#include "s-usg5-3.h"

/* We do have multiple jobs.  Handle ^Z. */

#undef NOMULTIPLEJOBS

/* If compiled by GNU C, we must have gnulib */

#ifdef __GNUC__
#define GNULIB /usr/local/lib/gcc-gnulib
#define LIBS_DEBUG
#else
#define GNULIB
#endif

#define START_FILES pre-crt0.o /usr/ccs/lib/crt1.o /usr/ccs/lib/crti.o /usr/ccs/lib/values-Xt.o

#define LIB_STANDARD GNULIB -lsocket -lnsl -lelf -lc /usr/ucblib/libucb.a /usr/ccs/lib/crtn.o

#define DATA_SEG_BITS 0x08000000

/* No <sioctl.h> */

#define NO_SIOCTL_H

/* Undump with ELF */

#undef COFF

#define UNEXEC unexelf.o

/* Get FIONREAD from <sys/filio.h>.  Get <sys/ttold.h> to get struct
 * tchars. But get <termio.h> first to make sure ttold.h doesn't
 * interfere.  And don't try to use SIGIO yet.
 */

#ifdef emacs
#include <sys/filio.h>
#include <termio.h>
#include <sys/ttold.h>
#include <signal.h>
#include <sys/wait.h>
#include <sys/stream.h>
#include <sys/stropts.h>
#include <sys/termios.h>
#undef SIGIO
#endif

/* libc has this stuff, but not utimes. */

#define HAVE_RENAME
#define HAVE_SELECT
#define HAVE_TIMEVAL
#define HAVE_CLOSEDIR
#define HAVE_GETTIMEOFDAY
#define HAVE_DUP2

#define USE_UTIME

/* <sys/stat.h> *defines* stat(2) as a static function.  If "static"
 * is blank, then many files will have a public definition for stat(2).
 */

#undef static

/* We need bss_end from emacs.c for undumping */

#ifndef USG_SHARED_LIBRARIES
#define USG_SHARED_LIBRARIES
#endif

/* We can support this */

#define CLASH_DETECTION

/* Data type of load average, as read out of kmem.  */

#define LOAD_AVE_TYPE long

/* Convert that into an integer that is 100 for a load average of 1.0  */
/* This is totally uncalibrated. */

#define LOAD_AVE_CVT(x) ((int) ((double) (x)) * 100.0 / FSCALE)
#define FSCALE 256.0

#define HAVE_PTYS
#define HAVE_SETSID

/* It is possible to receive SIGCHLD when there are no children
   waiting, because a previous waitsys(2) cleaned up the carcass of child
   without clearing the SIGCHLD pending info.  So, use a non-blocking
   wait3 instead, which maps to waitpid(2) in SysVr4. */

#define HAVE_WAIT_HEADER
#define WAITTYPE int
#define wait3(status, options, rusage) \
  waitpid((pid_t) -1, (status), (options))
#define WRETCODE(w) (w >> 8)

/* TIOCGPGRP is broken in SysVr4, so we can't send signals to PTY
   subprocesses the usual way.  But TIOCSIGNAL does work for PTYs, and
   this is all we need.  */

#define TIOCSIGSEND TIOCSIGNAL

/* This change means that we don't loop through allocate_pty too many
   times in the (rare) event of a failure. */

#undef FIRST_PTY_LETTER
#define FIRST_PTY_LETTER 'z'

/* This sets the name of the master side of the PTY. */

#define PTY_NAME_SPRINTF strcpy (pty_name, "/dev/ptmx");

/* This sets the name of the slave side of the PTY.  On SysVr4,
   grantpt(3) forks a subprocess, so keep sigchld_handler() from
   intercepting that death.  If any child but grantpt's should die
   within, it should be caught after sigrelse(2). */

#define PTY_TTY_NAME_SPRINTF			\
  {						\
    char *ptsname(), *ptyname;			\
						\
    sighold(SIGCLD);				\
    if (grantpt(fd) == -1)			\
      fatal("could not grant slave pty");	\
    sigrelse(SIGCLD);				\
    if (unlockpt(fd) == -1)			\
      fatal("could not unlock slave pty");	\
    if (!(ptyname = ptsname(fd)))		\
      fatal ("could not enable slave pty");	\
    strncpy(pty_name, ptyname, sizeof(pty_name)); \
    pty_name[sizeof(pty_name) - 1] = 0;		\
  }

/* Push various streams modules onto a PTY channel. */

#define SETUP_SLAVE_PTY \
  if (ioctl (xforkin, I_PUSH, "ptem") == -1)	\
    fatal ("ioctl I_PUSH ptem", errno);		\
  if (ioctl (xforkin, I_PUSH, "ldterm") == -1)	\
    fatal ("ioctl I_PUSH ldterm", errno);	\
  if (ioctl (xforkin, I_PUSH, "ttcompat") == -1) \
    fatal ("ioctl I_PUSH ttcompat", errno);