11573Srgrimes/*- 21573Srgrimes * Copyright (c) 1990, 1993 31573Srgrimes * The Regents of the University of California. All rights reserved. 41573Srgrimes * 51573Srgrimes * This code is derived from software contributed to Berkeley by 61573Srgrimes * Chris Torek. 71573Srgrimes * 81573Srgrimes * Redistribution and use in source and binary forms, with or without 91573Srgrimes * modification, are permitted provided that the following conditions 101573Srgrimes * are met: 111573Srgrimes * 1. Redistributions of source code must retain the above copyright 121573Srgrimes * notice, this list of conditions and the following disclaimer. 131573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141573Srgrimes * notice, this list of conditions and the following disclaimer in the 151573Srgrimes * documentation and/or other materials provided with the distribution. 16249808Semaste * 3. Neither the name of the University nor the names of its contributors 171573Srgrimes * may be used to endorse or promote products derived from this software 181573Srgrimes * without specific prior written permission. 191573Srgrimes * 201573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 211573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 221573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 231573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 241573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 251573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 261573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 271573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 281573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 291573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 301573Srgrimes * SUCH DAMAGE. 311573Srgrimes */ 321573Srgrimes 331573Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 341573Srgrimesstatic char sccsid[] = "@(#)funopen.c 8.1 (Berkeley) 6/4/93"; 351573Srgrimes#endif /* LIBC_SCCS and not lint */ 3692986Sobrien#include <sys/cdefs.h> 3792986Sobrien__FBSDID("$FreeBSD$"); 381573Srgrimes 391573Srgrimes#include <stdio.h> 401573Srgrimes#include <errno.h> 4171579Sdeischen 421573Srgrimes#include "local.h" 431573Srgrimes 441573SrgrimesFILE * 45200150Sedfunopen(const void *cookie, 46200150Sed int (*readfn)(void *, char *, int), 47200150Sed int (*writefn)(void *, const char *, int), 48200150Sed fpos_t (*seekfn)(void *, fpos_t, int), 49200150Sed int (*closefn)(void *)) 501573Srgrimes{ 5192889Sobrien FILE *fp; 521573Srgrimes int flags; 531573Srgrimes 541573Srgrimes if (readfn == NULL) { 551573Srgrimes if (writefn == NULL) { /* illegal */ 561573Srgrimes errno = EINVAL; 571573Srgrimes return (NULL); 581573Srgrimes } else 591573Srgrimes flags = __SWR; /* write only */ 601573Srgrimes } else { 611573Srgrimes if (writefn == NULL) 621573Srgrimes flags = __SRD; /* read only */ 631573Srgrimes else 641573Srgrimes flags = __SRW; /* read-write */ 651573Srgrimes } 661573Srgrimes if ((fp = __sfp()) == NULL) 671573Srgrimes return (NULL); 681573Srgrimes fp->_flags = flags; 691573Srgrimes fp->_file = -1; 701573Srgrimes fp->_cookie = (void *)cookie; 711573Srgrimes fp->_read = readfn; 721573Srgrimes fp->_write = writefn; 731573Srgrimes fp->_seek = seekfn; 741573Srgrimes fp->_close = closefn; 751573Srgrimes return (fp); 761573Srgrimes} 77