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diff --git a/src/s/bsd4-1.h b/src/s/bsd4-1.h
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+/* Definitions file for GNU Emacs running on bsd 4.1.
+   Copyright (C) 1985, 1986 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.  */
+
+
+/*
+ *	Define symbols to identify the version of Unix this is.
+ *	Define all the symbols that apply correctly.
+ */
+
+#define BSD4_1
+
+#define BSD
+
+/* SYSTEM_TYPE should indicate the kind of system you are using.
+ It sets the Lisp variable system-type.  */
+
+#define SYSTEM_TYPE "berkeley-unix"
+
+/* nomultiplejobs should be defined if your system's shell
+ does not have "job control" (the ability to stop a program,
+ run some other program, then continue the first one).  */
+
+/* #define NOMULTIPLEJOBS */
+
+/* Default is to set interrupt_input to 1: do input buffering within Emacs */
+
+#define INTERRUPT_INPUT
+
+/* First pty name is /dev/ptyp0.  */
+
+#define FIRST_PTY_LETTER 'p'
+ 
+/*
+ *	Define HAVE_TIMEVAL if the system supports the BSD style clock values.
+ *	Look in <sys/time.h> for a timeval structure.
+ */
+
+#undef HAVE_TIMEVAL
+ 
+/*
+ *	Define HAVE_SELECT if the system supports the `select' system call.
+ */
+
+/* #define HAVE_SELECT */
+
+/*
+ *	Define HAVE_PTYS if the system supports pty devices.
+ */
+
+/* #define HAVE_PTYS */
+
+/* Define this macro if system defines a type `union wait'.  */
+
+#define HAVE_UNION_WAIT
+
+/* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */
+
+/* #define HAVE_SOCKETS */
+
+/*
+ *	Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
+ *      The 4.2 opendir, etc., library functions.
+ */
+
+#define NONSYSTEM_DIR_LIBRARY
+
+/* Define this symbol if your system has the functions bcopy, etc. */
+
+/* #define BSTRING */
+
+/* subprocesses should be defined if you want to
+   have code for asynchronous subprocesses
+   (as used in M-x compile and M-x shell).
+   This is generally OS dependent, and not supported
+   under most USG systems. */
+
+#define subprocesses
+
+/* If your system uses COFF (Common Object File Format) then define the
+   preprocessor symbol "COFF". */
+
+/* #define COFF */
+
+/* define MAIL_USE_FLOCK if the mailer uses flock
+   to interlock access to /usr/spool/mail/$USER.
+   The alternative is that a lock file named
+   /usr/spool/mail/$USER.lock.  */
+
+/* #define MAIL_USE_FLOCK */
+
+/* Define CLASH_DETECTION if you want lock files to be written
+   so that Emacs can tell instantly when you try to modify
+   a file that someone else has modified in his Emacs.  */
+
+#undef CLASH_DETECTION    /* Might work; not tried yet.  */
+
+/* We use the Berkeley (and usg5.2.2) interface to nlist.  */
+
+#define NLIST_STRUCT
+
+/* The file containing the kernel's symbol table is called /vmunix.  */
+
+#define KERNEL_FILE "/vmunix"
+
+/* The symbol in the kernel where the load average is found
+   is named _avenrun.  */
+
+#define LDAV_SYMBOL "_avenrun"
+
+/* Special hacks needed to make Emacs run on this system.  */
+
+/* Make the function `signal' act as in 4.2.  */
+
+#define signal sigset
+
+#define _longjmp longjmp
+#define _setjmp setjmp
+
+#define lstat stat
+
+/* sys_open handles the necessary 4.2 features for open.  */
+
+#define open sys_open
+
+/* Names of flags for open.  */
+#define O_RDONLY 0
+#define O_WRONLY 1
+#define O_RDWR 2
+#define O_EXCL	2000
+#define O_CREAT 1000
+
+/* Special library needed for linking for 4.1.  */
+#define LIBS_SYSTEM -ljobs