/usr/lib/xemacs-21.4.22/x86_64-linux-gnu/include/s/bsd4-2.h is in xemacs21-bin 21.4.22-14ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 | /* Definitions file for GNU Emacs running on bsd 4.2
Copyright (C) 1985, 1986, 1994 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 2, 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 XEmacs; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* Synched up with: FSF 19.31. */
/*
* Define symbols to identify the version of Unix this is.
* Define all the symbols that apply correctly.
*/
#ifndef BSD4_2
#define BSD4_2 1
#endif /* BSD4_2 */
#ifndef BSD
#define BSD_WAS_DEFINED
#define BSD 42
#endif /* BSD */
/* SYSTEM_TYPE should indicate the kind of system you are using.
It sets the Lisp variable system-type. */
#define SYSTEM_TYPE "berkeley-unix"
/* First pty name is /dev/ptyp0. */
#define FIRST_PTY_LETTER 'p'
/*
* Define HAVE_PTYS if the system supports pty devices.
*/
#define HAVE_PTYS
/* 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 */
/* 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"
/* Formerly "BSD_PGRPS" */
#define SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
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