/** @file
Abstract device driver for the UEFI Shell-hosted environment.
In a Shell-hosted environment, this is the driver that is called
when no other driver matches.
Copyright (c) 2011, 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.
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 <Library/BaseLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/ShellLib.h>
#include <LibConfig.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <wctype.h>
#include <wchar.h>
#include <sys/fcntl.h>
#include <sys/filio.h>
#include <sys/syslimits.h>
#include <unistd.h>
#include <kfile.h>
#include <Device/Device.h>
#include <MainData.h>
#include <Efi/SysEfi.h>
/** EFI Shell specific operations for close().
@param[in] Fp Pointer to a file descriptor structure.
@retval 0 Successful completion.
@retval -1 Operation failed. Further information is specified by errno.
**/
static
int
EFIAPI
da_ShellClose(
IN struct __filedes *Fp
)
{
EFIerrno = ShellCloseFile( (SHELL_FILE_HANDLE *)&Fp->devdata);
if(RETURN_ERROR(EFIerrno)) {
return -1;
}
return 0;
}
/** EFI Shell specific operations for deleting a file or directory.
@param[in] filp Pointer to a file descriptor structure.
@retval 0 Successful completion.
@retval -1 Operation failed. Further information is specified by errno.
**/
static
int
EFIAPI
da_ShellDelete(
struct __filedes *filp
)
{
RETURN_STATUS Status;
Status = ShellDeleteFile( (SHELL_FILE_HANDLE *)&filp->devdata);
if(Status != RETURN_SUCCESS) {
errno = EFI2errno(Status);
EFIerrno = Status;
return -1;
}
return 0;
}
/** EFI Shell specific operations for setting the position within a file.
@param[in] filp Pointer to a file descriptor structure.
@param[in] offset Relative position to move to.
@param[in] whence Specifies the location offset is relative to: Beginning, Current, End.
@return Returns the new file position or EOF if the seek failed.
**/
static
off_t
EFIAPI
da_ShellSeek(
struct __filedes *filp,
off_t offset,
int whence
)
{
__off_t CurPos = -1;
RETURN_STATUS Status = RETURN_SUCCESS;
SHELL_FILE_HANDLE FileHandle;
FileHandle = (SHELL_FILE_HANDLE)filp->devdata;
if(whence != SEEK_SET) {
// We are doing a relative seek
if(whence == SEEK_END) {
// seeking relative to EOF, so position there first.
Status = ShellSetFilePosition( FileHandle, 0xFFFFFFFFFFFFFFFFULL);
}
if(Status == RETURN_SUCCESS) {
// Now, determine our current position.
Status = ShellGetFilePosition( FileHandle, (UINT64 *)&CurPos);
}
}
else {
CurPos = 0; // offset is an absolute position for SEEK_SET
if(offset < 0) {
Status = RETURN_INVALID_PARAMETER;
}
}
if(Status == RETURN_SUCCESS) {
/* CurPos now indicates the point we are seeking from, so seek... */
Status = ShellSetFilePosition( FileHandle, (UINT64)(CurPos + offset));
if(Status == RETURN_SUCCESS) {
// Now, determine our final position.
Status = ShellGetFilePosition( FileHandle, (UINT64 *)&CurPos);
}
}
if(Status != RETURN_SUCCESS) {
if(Status == EFI_UNSUPPORTED) {
errno = EISDIR;
}
else {
errno = EFI2errno(Status);
}
EFIerrno = Status;
CurPos = EOF;
}
return CurPos;
}
/** The directory path is created with the access permissions specified by
perms.
The directory is closed after it is created.
@param[in] path The directory to be created.
@param[in] perms Access permissions for the new directory.
@retval 0 The directory was created successfully.
@retval -1 An error occurred and an error code is stored in errno.
**/
static
int
EFIAPI
da_ShellMkdir(
const char *path,
__mode_t perms
)
{
UINT64 TempAttr;
SHELL_FILE_HANDLE FileHandle;
RETURN_STATUS Status;
EFI_FILE_INFO *FileInfo;
wchar_t *NewPath;
int retval = -1;
// Convert name from MBCS to WCS and change '/' to '\\'
NewPath = NormalizePath( path);
if(NewPath != NULL) {
Status = ShellCreateDirectory( NewPath, &FileHandle);
if(Status == RETURN_SUCCESS) {
FileInfo = ShellGetFileInfo( FileHandle);
Status = RETURN_ABORTED; // In case ShellGetFileInfo() failed
if(FileInfo != NULL) {
TempAttr = FileInfo->Attribute & (EFI_FILE_RESERVED | EFI_FILE_DIRECTORY);
FileInfo->Attribute = TempAttr | Omode2EFI(perms);
Status = ShellSetFileInfo( FileHandle, FileInfo);
FreePool(FileInfo);
if(Status == RETURN_SUCCESS) {
(void)ShellCloseFile(&FileHandle);
retval = 0;
}
}
}
errno = EFI2errno(Status);
EFIerrno = Status;
free(NewPath);
}
return retval;
}
/** EFI Shell specific operations for reading from a file.
@param[in] filp Pointer to a file descriptor structure.
@param[in] offset Offset into the file to begin reading at, or NULL.
@param[in] BufferSize Number of bytes in Buffer. Max number of bytes to read.
@param[in] Buffer Pointer to a buffer to receive the read data.
@return Returns the number of bytes successfully read,
or -1 if the operation failed. Further information is specified by errno.
**/
static
ssize_t
EFIAPI
da_ShellRead(
IN OUT struct __filedes *filp,
IN OUT off_t *offset,
IN size_t BufferSize,
OUT VOID *Buffer
)
{
ssize_t BufSize;
SHELL_FILE_HANDLE FileHandle;
RETURN_STATUS Status;
if(offset != NULL) {
BufSize = (ssize_t)da_ShellSeek(filp, *offset, SEEK_SET);
if(BufSize >= 0) {
filp->f_offset = BufSize;
}
}
BufSize = (ssize_t)BufferSize;
FileHandle = (SHELL_FILE_HANDLE)filp->devdata;
Status = ShellReadFile( FileHandle, (UINTN *)&BufSize, Buffer);
if(Status != RETURN_SUCCESS) {
EFIerrno = Status;
errno = EFI2errno(Status);
if(Status == RETURN_BUFFER_TOO_SMALL) {
BufSize = -BufSize;
}
else {
BufSize = -1;
}
}
else {
filp->f_offset += BufSize; // Advance to where we want to read next.
}
return BufSize;
}
/** EFI Shell specific operations for writing to a file.
@param[in] filp Pointer to a file descriptor structure.
@param[in] offset Offset into the file to begin writing at, or NULL.
@param[in] BufferSize Number of bytes in Buffer. Max number of bytes to write.
@param[in] Buffer Pointer to a buffer containing the data to be written.
@return Returns the number of bytes successfully written,
or -1 if the operation failed. Further information is specified by errno.
**/
static
ssize_t
EFIAPI
da_ShellWrite(
IN struct __filedes *filp,
IN off_t *offset,
IN size_t BufferSize,
IN const void *Buffer
)
{
ssize_t BufSize;
SHELL_FILE_HANDLE FileHandle;
RETURN_STATUS Status;
off_t Position = 0;
int How = SEEK_SET;
if((offset != NULL) || (filp->Oflags & O_APPEND)) {
if(filp->Oflags & O_APPEND) {
Position = 0;
How = SEEK_END;
}
else {
Position = *offset;
How = SEEK_SET;
}
BufSize = (ssize_t)da_ShellSeek(filp, Position, How);
if(BufSize >= 0) {
filp->f_offset = BufSize;
}
}
BufSize = (ssize_t)BufferSize;
FileHandle = (SHELL_FILE_HANDLE)filp->devdata;
Status = ShellWriteFile( FileHandle, (UINTN *)&BufSize, (void *)Buffer);
if(Status != RETURN_SUCCESS) {
EFIerrno = Status;
errno = EFI2errno(Status);
if(Status == EFI_UNSUPPORTED) {
errno = EISDIR;
}
BufSize = -1;
}
else {
filp->f_offset += BufSize; // Advance to where we want to write next.
}
return BufSize;
}
/** EFI Shell specific operations for getting information about an open file.
@param[in] filp Pointer to a file descriptor structure.
@param[out] statbuf Buffer in which to store the file status.
@param[in] Something This parameter is not used by this device.
@retval 0 Successful completion.
@retval -1 Operation failed. Further information is specified by errno.
**/
static
int
EFIAPI
da_ShellStat(
struct __filedes *filp,
struct stat *statbuf,
void *Something
)
{
SHELL_FILE_HANDLE FileHandle;
EFI_FILE_INFO *FileInfo = NULL;
UINT64 Attributes;
RETURN_STATUS Status;
mode_t newmode;
FileHandle = (SHELL_FILE_HANDLE)filp->devdata;
FileInfo = ShellGetFileInfo( FileHandle);
if(FileInfo != NULL) {
// Got the info, now populate statbuf with it
statbuf->st_blksize = S_BLKSIZE;
statbuf->st_size = FileInfo->FileSize;
statbuf->st_physsize = FileInfo->PhysicalSize;
statbuf->st_birthtime = Efi2Time( &FileInfo->CreateTime);
statbuf->st_atime = Efi2Time( &FileInfo->LastAccessTime);
statbuf->st_mtime = Efi2Time( &FileInfo->ModificationTime);
Attributes = FileInfo->Attribute;
newmode = (mode_t)(Attributes << S_EFISHIFT) | S_ACC_READ;
if((Attributes & EFI_FILE_DIRECTORY) == 0) {
newmode |= _S_IFREG;
if((Attributes & EFI_FILE_READ_ONLY) == 0) {
newmode |= S_ACC_WRITE;
}
}
else {
newmode |= _S_IFDIR;
}
statbuf->st_mode = newmode;
Status = RETURN_SUCCESS;
}
else {
Status = RETURN_DEVICE_ERROR;
errno = EIO;
}
EFIerrno = Status;
if(FileInfo != NULL) {
FreePool(FileInfo); // Release the buffer allocated by the GetInfo function
}
return (Status == RETURN_SUCCESS)? 0 : -1;
}
/** EFI Shell specific operations for low-level control of a file or device.
@param[in] filp Pointer to a file descriptor structure.
@param[in] cmd The command this ioctl is to perform.
@param[in,out] argp Zero or more arguments as needed by the command.
@retval 0 Successful completion.
@retval -1 Operation failed. Further information is specified by errno.
**/
static
int
EFIAPI
da_ShellIoctl(
struct __filedes *filp,
ULONGN cmd,
va_list argp
)
{
EFI_FILE_INFO *FileInfo = NULL;
SHELL_FILE_HANDLE FileHandle;
RETURN_STATUS Status = RETURN_SUCCESS;
int retval = 0;
FileHandle = (SHELL_FILE_HANDLE)filp->devdata;
FileInfo = ShellGetFileInfo( FileHandle);
if(FileInfo != NULL) {
if( cmd == (ULONGN)FIOSETIME) {
struct timeval *TV;
EFI_TIME *ET;
int mod = 0;
TV = va_arg(argp, struct timeval*);
if(TV[0].tv_sec != 0) {
ET = Time2Efi(TV[0].tv_sec);
if(ET != NULL) {
(void) memcpy(&FileInfo->LastAccessTime, ET, sizeof(EFI_TIME));
FileInfo->LastAccessTime.Nanosecond = TV[0].tv_usec * 1000;
free(ET);
++mod;
}
}
if(TV[1].tv_sec != 0) {
ET = Time2Efi(TV[1].tv_sec);
if(ET != NULL) {
(void) memcpy(&FileInfo->ModificationTime, ET, sizeof(EFI_TIME));
FileInfo->ModificationTime.Nanosecond = TV[1].tv_usec * 1000;
free(ET);
++mod;
}
}
/* Set access and modification times */
Status = ShellSetFileInfo(FileHandle, FileInfo);
errno = EFI2errno(Status);
}
}
else {
Status = RETURN_DEVICE_ERROR;
errno = EIO;
}
if(RETURN_ERROR(Status)) {
retval = -1;
}
EFIerrno = Status;
if(FileInfo != NULL) {
FreePool(FileInfo); // Release the buffer allocated by the GetInfo function
}
return retval;
}
/** EFI Shell specific operations for opening a file or directory.
@param[in] DevNode Pointer to a device descriptor
@param[in] filp Pointer to a file descriptor structure.
@param[in] DevInstance Not used by this device.
@param[in] Path File-system path to the file or directory.
@param[in] MPath Device or Map name on which Path resides.
@return Returns a file descriptor for the newly opened file,
or -1 if the Operation failed. Further information is specified by errno.
**/
int
EFIAPI
da_ShellOpen(
DeviceNode *DevNode,
struct __filedes *filp,
int DevInstance, /* Not used by Shell */
wchar_t *Path,
wchar_t *MPath
)
{
UINT64 OpenMode;
UINT64 Attributes;
SHELL_FILE_HANDLE FileHandle;
GenericInstance *Gip;
char *NPath;
wchar_t *WPath;
RETURN_STATUS Status;
int oflags;
int retval;
EFIerrno = RETURN_SUCCESS;
//Attributes = Omode2EFI(mode);
Attributes = 0;
// Convert oflags to Attributes
oflags = filp->Oflags;
OpenMode = Oflags2EFI(oflags);
if(OpenMode == 0) {
errno = EINVAL;
return -1;
}
/* Re-create the full mapped path for the shell. */
if(MPath != NULL) {
WPath = AllocateZeroPool(PATH_MAX * sizeof(wchar_t) + 1);
if(WPath == NULL) {
errno = ENOMEM;
EFIerrno = RETURN_OUT_OF_RESOURCES;
return -1;
}
wcsncpy(WPath, MPath, NAME_MAX); /* Get the Map Name */
wcsncat(WPath, Path, (PATH_MAX - NAME_MAX)); /* Append the path */
}
else {
WPath = Path;
}
retval = -1; /* Initially assume failure. */
/* Do we care if the file already exists?
If O_TRUNC, then delete the file. It will be created anew subsequently.
If O_EXCL, then error if the file exists and O_CREAT is set.
!!!!!!!!! Change this to use ShellSetFileInfo() to actually truncate the file
!!!!!!!!! instead of deleting and re-creating it.
*/
do { /* Do fake exception handling */
if((oflags & O_TRUNC) || ((oflags & (O_EXCL | O_CREAT)) == (O_EXCL | O_CREAT))) {
Status = ShellIsFile( WPath );
if(Status == RETURN_SUCCESS) {
// The file exists
if(oflags & O_TRUNC) {
NPath = AllocateZeroPool(PATH_MAX);
if(NPath == NULL) {
errno = ENOMEM;
EFIerrno = RETURN_OUT_OF_RESOURCES;
break;
}
wcstombs(NPath, WPath, PATH_MAX);
// We do a truncate by deleting the existing file and creating a new one.
if(unlink(NPath) != 0) {
filp->f_iflags = 0; // Release our reservation on this FD
FreePool(NPath);
break;
}
FreePool(NPath);
}
else if((oflags & (O_EXCL | O_CREAT)) == (O_EXCL | O_CREAT)) {
errno = EEXIST;
EFIerrno = RETURN_ACCESS_DENIED;
filp->f_iflags = 0; // Release our reservation on this FD
break;
}
}
}
// Call the EFI Shell's Open function
Status = ShellOpenFileByName( WPath, &FileHandle, OpenMode, Attributes);
if(RETURN_ERROR(Status)) {
filp->f_iflags = 0; // Release our reservation on this FD
// Set errno based upon Status
errno = EFI2errno(Status);
EFIerrno = Status;
break;
}
retval = 0;
// Successfully got a regular File
filp->f_iflags |= S_IFREG;
// Update the info in the fd
filp->devdata = (void *)FileHandle;
Gip = (GenericInstance *)DevNode->InstanceList;
filp->f_offset = 0;
filp->f_ops = &Gip->Abstraction;
// filp->devdata = FileHandle;
} while(FALSE);
/* If we get this far, WPath is not NULL.
If MPath is not NULL, then WPath was allocated so we need to free it.
*/
if(MPath != NULL) {
FreePool(WPath);
}
return retval;
}
#include <sys/poll.h>
/** Returns a bit mask describing which operations could be completed immediately.
For now, assume the file system, via the shell, is always ready.
(POLLIN | POLLRDNORM) The file system is ready to be read.
(POLLOUT) The file system is ready for output.
@param[in] filp Pointer to a file descriptor structure.
@param[in] events Bit mask describing which operations to check.
@return The returned value is a bit mask describing which operations
could be completed immediately, without blocking.
**/
static
short
EFIAPI
da_ShellPoll(
struct __filedes *filp,
short events
)
{
UINT32 RdyMask;
short retval = 0;
RdyMask = (UINT32)filp->Oflags;
switch(RdyMask & O_ACCMODE) {
case O_RDONLY:
retval = (POLLIN | POLLRDNORM);
break;
case O_WRONLY:
retval = POLLOUT;
break;
case O_RDWR:
retval = (POLLIN | POLLRDNORM | POLLOUT);
break;
default:
retval = POLLERR;
break;
}
return (retval & (events | POLL_RETONLY));
}
/** EFI Shell specific operations for renaming a file.
@param[in] from Name of the file to be renamed.
@param[in] to New name for the file.
@retval 0 Successful completion.
@retval -1 Operation failed. Further information is specified by errno.
**/
static
int
EFIAPI
da_ShellRename(
const char *from,
const char *to
)
{
RETURN_STATUS Status;
EFI_FILE_INFO *NewFileInfo;
EFI_FILE_INFO *OldFileInfo;
wchar_t *NewFn;
int OldFd;
SHELL_FILE_HANDLE FileHandle;
wchar_t *NormalizedPath;
// Open old file
OldFd = open(from, O_RDWR, 0);
if(OldFd >= 0) {
FileHandle = (SHELL_FILE_HANDLE)gMD->fdarray[OldFd].devdata;
NewFileInfo = malloc(sizeof(EFI_FILE_INFO) + PATH_MAX);
if(NewFileInfo != NULL) {
OldFileInfo = ShellGetFileInfo( FileHandle);
if(OldFileInfo != NULL) {
// Copy the Old file info into our new buffer, and free the old.
memcpy(NewFileInfo, OldFileInfo, sizeof(EFI_FILE_INFO));
FreePool(OldFileInfo);
// Normalize path and convert to WCS.
NormalizedPath = NormalizePath(to);
if (NormalizedPath != NULL) {
// Strip off all but the file name portion of new
NewFn = GetFileNameFromPath(NormalizedPath);
// Copy the new file name into our new file info buffer
wcsncpy(NewFileInfo->FileName, NewFn, wcslen(NewFn) + 1);
// Update the size of the structure.
NewFileInfo->Size = sizeof(EFI_FILE_INFO) + StrSize(NewFn);
// Apply the new file name
Status = ShellSetFileInfo(FileHandle, NewFileInfo);
free(NormalizedPath);
free(NewFileInfo);
if(Status == EFI_SUCCESS) {
// File has been successfully renamed. We are DONE!
return 0;
}
errno = EFI2errno( Status );
EFIerrno = Status;
}
else {
free(NewFileInfo);
errno = ENOMEM;
}
}
else {
free(NewFileInfo);
errno = EIO;
}
}
else {
errno = ENOMEM;
}
}
return -1;
}
/** EFI Shell specific operations for deleting directories.
@param[in] filp Pointer to a file descriptor structure.
@retval 0 Successful completion.
@retval -1 Operation failed. Further information is specified by errno.
**/
static
int
EFIAPI
da_ShellRmdir(
struct __filedes *filp
)
{
SHELL_FILE_HANDLE FileHandle;
RETURN_STATUS Status = RETURN_SUCCESS;
EFI_FILE_INFO *FileInfo;
int OldErrno;
int Count = 0;
BOOLEAN NoFile = FALSE;
OldErrno = errno; // Save the original value
errno = 0; // Make it easier to see if we have an error later
FileHandle = (SHELL_FILE_HANDLE)filp->devdata;
FileInfo = ShellGetFileInfo(FileHandle);
if(FileInfo != NULL) {
if((FileInfo->Attribute & EFI_FILE_DIRECTORY) == 0) {
errno = ENOTDIR;
}
else {
FreePool(FileInfo); // Free up the buffer from ShellGetFileInfo()
// See if the directory has any entries other than ".." and ".".
Status = ShellFindFirstFile( FileHandle, &FileInfo);
if(Status == RETURN_SUCCESS) {
++Count;
while(Count < 3) {
Status = ShellFindNextFile( FileHandle, FileInfo, &NoFile);
if(Status == RETURN_SUCCESS) {
if(NoFile) {
break;
}
++Count;
}
else {
Count = 99;
}
}
/* Count == 99 and FileInfo is allocated if ShellFindNextFile failed.
ShellFindNextFile has freed FileInfo itself if it sets NoFile TRUE.
*/
if((! NoFile) || (Count == 99)) {
free(FileInfo); // Free buffer from ShellFindFirstFile()
}
if(Count < 3) {
// Directory is empty
Status = ShellDeleteFile( &FileHandle);
if(Status == RETURN_SUCCESS) {
EFIerrno = RETURN_SUCCESS;
errno = OldErrno; // Restore the original value
return 0;
/* ######## SUCCESSFUL RETURN ######## */
}
/* FileInfo is freed and FileHandle closed. */
}
else {
if(Count == 99) {
errno = EIO;
}
else {
errno = ENOTEMPTY;
}
}
}
}
}
else {
errno = EIO;
}
ShellCloseFile( &FileHandle);
EFIerrno = Status;
if(errno == 0) {
errno = EFI2errno( Status );
}
return -1;
}
/** Construct an instance of the abstract Shell device.
Allocate the instance structure and populate it with the information for
the device.
@param[in] ImageHandle This application's image handle.
@param[in] SystemTable Pointer to the UEFI System Table.
@retval RETURN_SUCCESS Successful completion.
@retval RETURN_OUT_OF_RESOURCES Failed to allocate memory for new device.
@retval RETURN_INVALID_PARAMETER A default device has already been created.
**/
RETURN_STATUS
EFIAPI
__ctor_DevShell(
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
GenericInstance *Stream;
DeviceNode *Node;
RETURN_STATUS Status;
Stream = (GenericInstance *)AllocateZeroPool(sizeof(GenericInstance));
if(Stream == NULL) {
return RETURN_OUT_OF_RESOURCES;
}
Stream->Cookie = CON_COOKIE;
Stream->InstanceNum = 1;
Stream->Dev = NULL;
Stream->Abstraction.fo_close = &da_ShellClose;
Stream->Abstraction.fo_read = &da_ShellRead;
Stream->Abstraction.fo_write = &da_ShellWrite;
Stream->Abstraction.fo_fcntl = &fnullop_fcntl;
Stream->Abstraction.fo_poll = &da_ShellPoll;
Stream->Abstraction.fo_flush = &fnullop_flush;
Stream->Abstraction.fo_stat = &da_ShellStat;
Stream->Abstraction.fo_ioctl = &da_ShellIoctl;
Stream->Abstraction.fo_delete = &da_ShellDelete;
Stream->Abstraction.fo_rmdir = &da_ShellRmdir;
Stream->Abstraction.fo_mkdir = &da_ShellMkdir;
Stream->Abstraction.fo_rename = &da_ShellRename;
Stream->Abstraction.fo_lseek = &da_ShellSeek;
Node = __DevRegister(NULL, NULL, &da_ShellOpen, Stream, 1, sizeof(GenericInstance), O_RDWR);
Status = EFIerrno;
Stream->Parent = Node;
return Status;
}
/** Destructor for previously constructed EFI Shell device instances.
@param[in] ImageHandle This application's image handle.
@param[in] SystemTable Pointer to the UEFI System Table.
@retval 0 Successful completion is always returned.
**/
RETURN_STATUS
EFIAPI
__dtor_DevShell(
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
if(daDefaultDevice != NULL) {
if(daDefaultDevice->InstanceList != NULL) {
FreePool(daDefaultDevice->InstanceList);
}
FreePool(daDefaultDevice);
}
return RETURN_SUCCESS;
}