1 /* Copyright (C) 1989, 1990, 1991, 1992, 2000, 2001, 2004, 2009
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 3 of the License, or
10 (at your option) any later version.
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
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
28 #include <sys/types.h>
31 /* The Net-2 man pages says that a MAP_FILE flag is required. */
40 char *mapread(int fd, int nbytes)
42 char *p = (char *)mmap((void *)0, (size_t)nbytes, PROT_READ,
43 MAP_FILE|MAP_PRIVATE, fd, (off_t)0);
46 /* mmap() shouldn't return 0 since MAP_FIXED wasn't specified. */
52 int unmap(char *p, int len)
54 return munmap((void *)p, len);
61 #else /* not HAVE_MMAP */
69 char *mapread(int fd, int nbytes)
75 int unmap(char *p, int len)
85 #endif /* not HAVE_MMAP */