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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
/* Copyright (c) 2013 OmniTI Computer Consulting, Inc. All rights reserved. */
/*
* Copyright 2020 Robert Mustacchi
*/
/*
* Commonized processing of the 'mode' string for stdio.
*/
#include "mtlib.h"
#include "file64.h"
#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#include <fcntl.h>
int
_stdio_flags(const char *type, int *oflagsp, int *fflagsp)
{
int oflag, fflag, plusflag, eflag, xflag;
const char *echr;
oflag = fflag = 0;
switch (type[0]) {
default:
errno = EINVAL;
return (-1);
case 'r':
oflag = O_RDONLY;
fflag = _IOREAD;
break;
case 'w':
oflag = O_WRONLY | O_TRUNC | O_CREAT;
fflag = _IOWRT;
break;
case 'a':
oflag = O_WRONLY | O_APPEND | O_CREAT;
fflag = _IOWRT;
break;
}
plusflag = 0;
eflag = 0;
xflag = 0;
for (echr = type + 1; *echr != '\0'; echr++) {
switch (*echr) {
/* UNIX ignores 'b' and treats text and binary the same */
default:
break;
case '+':
plusflag = 1;
break;
case 'e':
eflag = 1;
break;
case 'x':
xflag = 1;
break;
}
}
if (eflag) {
/* Subsequent to a mode flag, 'e' indicates O_CLOEXEC */
oflag = oflag | O_CLOEXEC;
}
if (plusflag) {
oflag = (oflag & ~(O_RDONLY | O_WRONLY)) | O_RDWR;
fflag = _IORW;
}
if (xflag) {
oflag |= O_EXCL;
}
*oflagsp = oflag;
*fflagsp = fflag;
return (0);
}
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