/** @file | |
Implementation of internal function to return the (stdio) flags for a given mode. | |
Copyright (c) 2010, Intel Corporation. All rights reserved.<BR> | |
This program and the accompanying materials are licensed and made available | |
under the terms and conditions of the BSD License that accompanies this | |
distribution. The full text of the license may be found at | |
http://opensource.org/licenses/bsd-license.php. | |
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
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: | |
- Redistributions of source code must retain the above copyright | |
notice, this list of conditions and the following disclaimer. | |
- 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. | |
- 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDERS OR CONTRIBUTORS BE | |
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
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NetBSD: flags.c,v 1.14 2003/08/07 16:43:23 agc Exp | |
flags.c 8.1 (Berkeley) 6/4/93 | |
**/ | |
#include <LibConfig.h> | |
#include <sys/EfiCdefs.h> | |
#include <sys/types.h> | |
#include <assert.h> | |
#include <fcntl.h> | |
#include <stdio.h> | |
#include <errno.h> | |
#include "reentrant.h" | |
#include "local.h" | |
/* | |
* Return the (stdio) flags for a given mode. Store the flags | |
* to be passed to an open() syscall through *optr. | |
* Return 0 on error. | |
*/ | |
int | |
__sflags(const char *mode, int *optr) | |
{ | |
int ret, m, o; | |
_DIAGASSERT(mode != NULL); | |
switch (*mode++) { | |
case 'r': /* open for reading */ | |
ret = __SRD; | |
m = O_RDONLY; | |
o = 0; | |
break; | |
case 'w': /* open for writing */ | |
ret = __SWR; | |
m = O_WRONLY; | |
o = O_CREAT | O_TRUNC; | |
break; | |
case 'a': /* open for appending */ | |
ret = __SWR; | |
m = O_WRONLY; | |
o = O_CREAT | O_APPEND; | |
break; | |
default: /* illegal mode */ | |
errno = EINVAL; | |
return (0); | |
} | |
/* | |
* [rwa]\+ or [rwa]b\+ means read and write | |
* f means open only plain files. | |
*/ | |
for (; *mode; mode++) | |
switch (*mode) { | |
case '+': | |
ret = __SRW; | |
m = O_RDWR; | |
break; | |
case 'f': | |
o |= O_NONBLOCK; | |
break; | |
case 'b': | |
break; | |
default: /* We could produce a warning here */ | |
break; | |
} | |
*optr = m | o; | |
return (ret); | |
} |