1 /*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Chris Torek. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * $FreeBSD: src/lib/libc/stdio/funopen.c,v 1.1.1.1.14.1 2001/03/05 10:57:52 obrien Exp $ 37 * $DragonFly: src/lib/libc/stdio/funopen.c,v 1.5 2005/07/23 20:23:06 joerg Exp $ 38 * 39 * @(#)funopen.c 8.1 (Berkeley) 6/4/93 40 */ 41 42 #include <stdio.h> 43 #include <errno.h> 44 45 #include "local.h" 46 #include "priv_stdio.h" 47 48 FILE * 49 funopen(const void *cookie, int (*readfn)(void *, char *, int), 50 int (*writefn)(void *, const char *, int), 51 fpos_t (*seekfn)(void *cookie, fpos_t off, int whence), 52 int (*closefn)(void *)) 53 { 54 FILE *fp; 55 int flags; 56 57 if (readfn == NULL) { 58 if (writefn == NULL) { /* illegal */ 59 errno = EINVAL; 60 return (NULL); 61 } else 62 flags = __SWR; /* write only */ 63 } else { 64 if (writefn == NULL) 65 flags = __SRD; /* read only */ 66 else 67 flags = __SRW; /* read-write */ 68 } 69 if ((fp = __sfp()) == NULL) 70 return (NULL); 71 fp->pub._flags = flags; 72 fp->pub._fileno = -1; 73 fp->_cookie = (void *)cookie; 74 fp->_read = readfn; 75 fp->_write = writefn; 76 fp->_seek = seekfn; 77 fp->_close = closefn; 78 return (fp); 79 } 80