/* Copyright (C) 1989, 1990, 1991, 1992, 2000, 2001, 2004 Free Software Foundation, Inc. Written by James Clark (jjc@jclark.com) This file is part of groff. groff 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. groff 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 groff; see the file COPYING. If not, write to the Free Software Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */ #include <stdlib.h> #ifdef HAVE_CONFIG_H #include <config.h> #endif #ifdef HAVE_MMAP #include <sys/types.h> #include <sys/mman.h> /* The Net-2 man pages says that a MAP_FILE flag is required. */ #ifndef MAP_FILE #define MAP_FILE 0 #endif #ifdef __cplusplus extern "C" { #endif char *mapread(int fd, int nbytes) { char *p = (char *)mmap((void *)0, (size_t)nbytes, PROT_READ, MAP_FILE|MAP_PRIVATE, fd, (off_t)0); if (p == (char *)-1) return 0; /* mmap() shouldn't return 0 since MAP_FIXED wasn't specified. */ if (p == 0) abort(); return p; } int unmap(char *p, int len) { return munmap((void *)p, len); } #ifdef __cplusplus } #endif #else /* not HAVE_MMAP */ #include <errno.h> #ifdef __cplusplus extern "C" { #endif char *mapread(int fd, int nbytes) { errno = ENODEV; return 0; } int unmap(char *p, int len) { errno = EINVAL; return -1; } #ifdef __cplusplus } #endif #endif /* not HAVE_MMAP */