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/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
/*static char *sccsid = "from: @(#)funopen.c 5.2 (Berkeley) 2/5/91";*/
static char *rcsid = "$Id: funopen.c,v 1.1 1995/10/18 08:43:07 deraadt Exp $";
#endif /* LIBC_SCCS and not lint */
#include <pthread.h>
#include <stdio.h>
#include <errno.h>
#include "local.h"
FILE *
funopen(cookie, readfn, writefn, seekfn, closefn)
const void *cookie;
int (*readfn)(), (*writefn)();
#if __STDC__
fpos_t (*seekfn)(void *cookie, fpos_t off, int whence);
#else
fpos_t (*seekfn)();
#endif
int (*closefn)();
{
struct fd_ops *fd_ops;
char *flags;
FILE *fp;
int fd;
if (readfn == NULL) {
if (writefn == NULL) { /* illegal */
errno = EINVAL;
return (NULL);
} else
flags = "w"; /* write only */
} else {
if (writefn == NULL)
flags = "r"; /* read only */
else
flags = "r+"; /* read-write */
}
if (fd_ops = (struct fd_ops*)malloc(sizeof(struct fd_ops))) {
if ((!(fd = fd_allocate())) < OK) {
/* Set functions */
fd_ops->seek = seekfn;
fd_ops->read = readfn;
fd_ops->write = writefn;
fd_ops->close = closefn;
/* Alloc space for funtion pointer table */
fd_table[fd]->type = FD_HALF_DUPLEX;
fd_table[fd]->ops = fd_ops;
/* Save the cookie, it's important */
fd_table[fd]->fd.ptr = cookie;
if (fp = fdopen(fd, flags))
return(fp);
fd_free(fd);
}
free(fd_ops);
}
return(NULL);
}
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