GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/stdio/flags.c Lines: 9 16 56.3 %
Date: 2017-11-13 Branches: 6 12 50.0 %

Line Branch Exec Source
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/*	$OpenBSD: flags.c,v 1.8 2014/08/31 02:21:18 guenther Exp $ */
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/*-
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 * Copyright (c) 1990, 1993
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 *	The Regents of the University of California.  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. 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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#include <sys/types.h>
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#include <sys/file.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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/*
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 * Return the (stdio) flags for a given mode.  Store the flags
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 * to be passed to an open() syscall through *optr.
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 * Return 0 on error.
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 */
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int
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__sflags(const char *mode, int *optr)
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{
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	int ret, m, o;
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	switch (*mode++) {
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	case 'r':	/* open for reading */
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		ret = __SRD;
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		m = O_RDONLY;
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		o = 0;
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		break;
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	case 'w':	/* open for writing */
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		ret = __SWR;
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		m = O_WRONLY;
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		o = O_CREAT | O_TRUNC;
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		break;
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	case 'a':	/* open for appending */
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		ret = __SWR;
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		m = O_WRONLY;
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		o = O_CREAT | O_APPEND;
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		break;
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	default:	/* illegal mode */
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		errno = EINVAL;
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		return (0);
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	}
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	while (*mode != '\0')
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		switch (*mode++) {
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		case 'b':
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			break;
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		case '+':
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			ret = __SRW;
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			m = O_RDWR;
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			break;
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		case 'e':
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			o |= O_CLOEXEC;
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			break;
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		case 'x':
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			if (o & O_CREAT)
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				o |= O_EXCL;
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			break;
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		default:
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			/*
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			 * Lots of software passes other extension mode
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			 * letters, like Window's 't'
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			 */
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#if 0
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			errno = EINVAL;
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			return (0);
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#else
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			break;
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#endif
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		}
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	*optr = m | o;
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	return (ret);
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}