81 lines
2.8 KiB
C
81 lines
2.8 KiB
C
/*-
|
|
* Copyright (c) 1990, 1993
|
|
* 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[] = "@(#)funopen.c 8.1 (Berkeley) 6/4/93";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
|
|
#include "local.h"
|
|
|
|
FILE *
|
|
funopen(cookie, readfn, writefn, seekfn, closefn)
|
|
const void *cookie;
|
|
int (*readfn)(), (*writefn)();
|
|
fpos_t (*seekfn)(void *cookie, fpos_t off, int whence);
|
|
int (*closefn)();
|
|
{
|
|
FILE *fp;
|
|
int flags;
|
|
|
|
if (readfn == NULL) {
|
|
if (writefn == NULL) { /* illegal */
|
|
errno = EINVAL;
|
|
return (NULL);
|
|
} else
|
|
flags = __SWR; /* write only */
|
|
} else {
|
|
if (writefn == NULL)
|
|
flags = __SRD; /* read only */
|
|
else
|
|
flags = __SRW; /* read-write */
|
|
}
|
|
if ((fp = __sfp()) == NULL)
|
|
return (NULL);
|
|
fp->_flags = flags;
|
|
fp->_file = -1;
|
|
fp->_cookie = (void *)cookie;
|
|
fp->_read = readfn;
|
|
fp->_write = writefn;
|
|
fp->_seek = seekfn;
|
|
fp->_close = closefn;
|
|
return (fp);
|
|
}
|