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/** @file
Value transformations between stdio and the UEFI environment.
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.
**/
#include <Uefi.h>
#include <LibConfig.h>
#include <sys/EfiCdefs.h>
#include <errno.h>
#include <fcntl.h>
#include "SysEfi.h"
/** Translate the Open flags into a Uefi Open Modes value.
The Open Flags are:
O_RDONLY, O_WRONLY, O_RDWR // Pick only one
O_NONBLOCK, O_APPEND, O_CREAT, O_TRUNC, O_EXCL // ORed with one of the previous
The UEFI Open modes are:
// ******************************************************
// Open Modes
// ******************************************************
#define EFI_FILE_MODE_READ 0x0000000000000001
#define EFI_FILE_MODE_WRITE 0x0000000000000002
#define EFI_FILE_MODE_CREATE 0x8000000000000000
*/
UINT64
Oflags2EFI( int oflags )
{
UINT64 flags;
// Build the Open Modes
flags = (UINT64)((oflags & O_ACCMODE) + 1); // Handle the Read/Write flags
if(oflags & (O_CREAT | O_TRUNC)) { // Now add the Create flag.
// Also added if O_TRUNC set since we will need to create a new file.
// We just set the flags here since the only valid EFI mode with create
// is Read+Write+Create.
flags = EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_CREATE;
}
return flags;
}
/* Transform the permissions flags from the open() call into the
Attributes bits needed by UEFI.
The UEFI File attributes are:
// ******************************************************
// File Attributes
// ******************************************************
#define EFI_FILE_READ_ONLY 0x0000000000000001
#define EFI_FILE_HIDDEN 0x0000000000000002
#define EFI_FILE_SYSTEM 0x0000000000000004
#define EFI_FILE_RESERVED 0x0000000000000008
#define EFI_FILE_DIRECTORY 0x0000000000000010
#define EFI_FILE_ARCHIVE 0x0000000000000020
#define EFI_FILE_VALID_ATTR 0x0000000000000037
The input permission flags consist of two groups:
( S_IRUSR | S_IRGRP | S_IROTH ) -- S_ACC_READ
( S_IWUSR | S_IWGRP | S_IWOTH ) -- S_ACC_WRITE
The only thing we can set, at this point, is whether or not
this is a SYSTEM file. If the group and other bits are
zero and the user bits are non-zero then set SYSTEM. Otherwise
the attributes are zero.
The attributes can be set later using fcntl().
*/
UINT64
Omode2EFI( int mode)
{
UINT64 flags = 0;
if((mode & (S_IRWXG | S_IRWXO)) == 0) {
if((mode & S_IRWXU) != 0) {
// Only user permissions so set system
flags = EFI_FILE_SYSTEM;
}
}
return flags;
}
/* Converts the first several EFI status values into the appropriate errno value.
*/
int
EFI2errno( RETURN_STATUS Status)
{
int retval;
switch(Status) {
case RETURN_SUCCESS:
retval = 0;
break;
case RETURN_INVALID_PARAMETER:
retval = EINVAL;
break;
case RETURN_UNSUPPORTED:
retval = ENODEV;
break;
case RETURN_BAD_BUFFER_SIZE:
case RETURN_BUFFER_TOO_SMALL:
retval = EBUFSIZE;
break;
case RETURN_NOT_READY:
retval = EBUSY;
break;
case RETURN_WRITE_PROTECTED:
retval = EROFS;
break;
case RETURN_OUT_OF_RESOURCES: // May be overridden by specific functions
retval = ENOMEM;
break;
case RETURN_VOLUME_FULL:
retval = ENOSPC;
break;
case RETURN_NOT_FOUND:
case RETURN_NO_MAPPING:
retval = ENOENT;
break;
case RETURN_TIMEOUT:
retval = ETIMEDOUT;
break;
case RETURN_NOT_STARTED:
retval = EAGAIN;
break;
case RETURN_ALREADY_STARTED:
retval = EALREADY;
break;
case RETURN_ABORTED:
retval = EINTR;
break;
case RETURN_ICMP_ERROR:
case RETURN_TFTP_ERROR:
case RETURN_PROTOCOL_ERROR:
retval = EPROTO;
break;
case RETURN_INCOMPATIBLE_VERSION:
retval = EPERM;
break;
case RETURN_ACCESS_DENIED:
case RETURN_SECURITY_VIOLATION:
retval = EACCES;
break;
/* case RETURN_LOAD_ERROR:
case RETURN_DEVICE_ERROR:
case RETURN_VOLUME_CORRUPTED:
case RETURN_NO_MEDIA:
case RETURN_MEDIA_CHANGED:
case RETURN_NO_RESPONSE:
case RETURN_CRC_ERROR:
case RETURN_END_OF_MEDIA:
case RETURN_END_OF_FILE:
case RETURN_INVALID_LANGUAGE:
*/
default:
retval = EIO;
break;
}
return retval;
}
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