1 /* Copyright (C) 1989, 1990, 1991, 1992, 2000, 2001
2 Free Software Foundation, Inc.
3 Written by James Clark (jjc@jclark.com)
5 This file is part of groff.
7 groff is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 groff is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License along
18 with groff; see the file COPYING. If not, write to the Free Software
19 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
29 #include <sys/types.h>
32 /* The Net-2 man pages says that a MAP_FILE flag is required. */
37 char *mapread(fd, nbytes)
41 char *p = (char *)mmap((caddr_t)0, (size_t)nbytes, PROT_READ,
42 MAP_FILE|MAP_PRIVATE, fd, (off_t)0);
45 /* mmap() shouldn't return 0 since MAP_FIXED wasn't specified. */
55 return munmap((caddr_t)p, len);
58 #else /* not HAVE_MMAP */
62 char *mapread(fd, nbytes)
78 #endif /* not HAVE_MMAP */