101 lines
3.2 KiB
C
101 lines
3.2 KiB
C
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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/*static char *sccsid = "from: @(#)funopen.c 5.2 (Berkeley) 2/5/91";*/
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static char *rcsid = "$Id: funopen.c,v 1.1 1994/02/07 22:06:02 proven Exp $";
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#endif /* LIBC_SCCS and not lint */
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#include <pthread.h>
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#include <stdio.h>
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#include <errno.h>
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#include "local.h"
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FILE *
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funopen(cookie, readfn, writefn, seekfn, closefn)
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const void *cookie;
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int (*readfn)(), (*writefn)();
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#if __STDC__
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fpos_t (*seekfn)(void *cookie, fpos_t off, int whence);
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#else
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fpos_t (*seekfn)();
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#endif
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int (*closefn)();
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{
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struct fd_ops *fd_ops;
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char *flags;
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FILE *fp;
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int fd;
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if (readfn == NULL) {
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if (writefn == NULL) { /* illegal */
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errno = EINVAL;
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return (NULL);
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} else
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flags = "w"; /* write only */
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} else {
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if (writefn == NULL)
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flags = "r"; /* read only */
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else
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flags = "r+"; /* read-write */
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}
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if (fd_ops = (struct fd_ops*)malloc(sizeof(struct fd_ops))) {
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if ((!(fd = fd_allocate())) < OK) {
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/* Set functions */
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fd_ops->seek = seekfn;
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fd_ops->read = readfn;
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fd_ops->write = writefn;
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fd_ops->close = closefn;
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/* Alloc space for funtion pointer table */
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fd_table[fd]->type = FD_HALF_DUPLEX;
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fd_table[fd]->ops = fd_ops;
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/* Save the cookie, it's important */
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fd_table[fd]->fd.ptr = cookie;
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if (fp = fdopen(fd, flags))
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return(fp);
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fd_free(fd);
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}
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free(fd_ops);
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}
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return(NULL);
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}
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