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ff_file.c
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ff_file.c
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/*
* FreeRTOS+FAT V2.3.3
* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* https://www.FreeRTOS.org
* https://github.com/FreeRTOS
*
*/
/**
* @file ff_file.c
* @ingroup FILEIO
*
* @defgroup FILEIO FILE I/O Access
* @brief Provides an interface to allow File I/O on a mounted IOMAN.
*
* Provides file-system interfaces for the FAT file-system.
**/
#include "ff_headers.h"
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
#include <wchar.h>
#endif
static FF_Error_t FF_Truncate( FF_FILE * pxFile,
BaseType_t bClosing );
static uint32_t FF_ReadPartial( FF_FILE * pxFile,
uint32_t ulItemLBA,
uint32_t ulRelBlockPos,
uint32_t ulCount,
uint8_t * pucBuffer,
FF_Error_t * pxError );
static uint32_t FF_WritePartial( FF_FILE * pxFile,
uint32_t ulItemLBA,
uint32_t ulRelBlockPos,
uint32_t ulCount,
const uint8_t * pucBuffer,
FF_Error_t * pxError );
static uint32_t FF_SetCluster( FF_FILE * pxFile,
FF_Error_t * pxError );
static uint32_t FF_FileLBA( FF_FILE * pxFile );
static FF_Error_t FF_ExtendFile( FF_FILE * pxFile,
uint32_t ulSize );
/*-----------------------------------------------------------*/
/**
* @brief Converts STDIO mode strings into the equivalent FreeRTOS+FAT mode.
*
* @param pcMode The mode string e.g. "rb" "rb+" "w" "a" "r" "w+" "a+" etc
*
* @return Returns the mode bits that should be passed to the FF_Open function.
**/
uint8_t FF_GetModeBits( const char * pcMode )
{
uint8_t ucModeBits = 0x00;
while( *pcMode != '\0' )
{
switch( *pcMode )
{
case 'r': /* Allow Read. */
case 'R':
ucModeBits |= FF_MODE_READ;
break;
case 'w': /* Allow Write. */
case 'W':
ucModeBits |= FF_MODE_WRITE;
ucModeBits |= FF_MODE_CREATE; /* Create if not exist. */
ucModeBits |= FF_MODE_TRUNCATE;
break;
case 'a': /* Append new writes to the end of the file. */
case 'A':
ucModeBits |= FF_MODE_WRITE;
ucModeBits |= FF_MODE_APPEND;
ucModeBits |= FF_MODE_CREATE; /* Create if not exist. */
break;
case '+': /* Update the file, don't Append! */
ucModeBits |= FF_MODE_READ;
ucModeBits |= FF_MODE_WRITE; /* RW Mode. */
break;
case 'D':
/* Internal use only! */
ucModeBits |= FF_MODE_DIR;
break;
case 'b':
case 'B':
/* b|B flags not supported (Binary mode is native anyway). */
break;
default:
break;
}
pcMode++;
}
return ucModeBits;
} /* FF_GetModeBits() */
/*-----------------------------------------------------------*/
static FF_FILE * prvAllocFileHandle( FF_IOManager_t * pxIOManager,
FF_Error_t * pxError )
{
FF_FILE * pxFile;
pxFile = ffconfigMALLOC( sizeof( FF_FILE ) );
if( pxFile == NULL )
{
*pxError = FF_createERR( FF_ERR_NOT_ENOUGH_MEMORY, FF_OPEN );
}
else
{
memset( pxFile, 0, sizeof( *pxFile ) );
#if ( ffconfigOPTIMISE_UNALIGNED_ACCESS != 0 )
{
pxFile->pucBuffer = ( uint8_t * ) ffconfigMALLOC( pxIOManager->usSectorSize );
if( pxFile->pucBuffer != NULL )
{
memset( pxFile->pucBuffer, 0, pxIOManager->usSectorSize );
}
else
{
*pxError = FF_createERR( FF_ERR_NOT_ENOUGH_MEMORY, FF_OPEN );
ffconfigFREE( pxFile );
/* Make sure that NULL will be returned. */
pxFile = NULL;
}
}
#else /* if ( ffconfigOPTIMISE_UNALIGNED_ACCESS != 0 ) */
{
/* Remove compiler warnings. */
( void ) pxIOManager;
}
#endif /* if ( ffconfigOPTIMISE_UNALIGNED_ACCESS != 0 ) */
}
return pxFile;
} /* prvAllocFileHandle() */
/*-----------------------------------------------------------*/
/**
* FF_Open() Mode Information
* - FF_MODE_WRITE
* - Allows WRITE access to the file.
* .
* - FF_MODE_READ
* - Allows READ access to the file.
* .
* - FF_MODE_CREATE
* - Create file if it doesn't exist.
* .
* - FF_MODE_TRUNCATE
* - Erase the file if it already exists and overwrite.
* *
* - FF_MODE_APPEND
* - Causes all writes to occur at the end of the file. (Its impossible to overwrite other data in a file with this flag set).
* .
* .
*
* Some sample modes:
* - (FF_MODE_WRITE | FF_MODE_CREATE | FF_MODE_TRUNCATE)
* - Write access to the file. (Equivalent to "w").
* .
* - (FF_MODE_WRITE | FF_MODE_READ)
* - Read and Write access to the file. (Equivalent to "rb+").
* .
* - (FF_MODE_WRITE | FF_MODE_READ | FF_MODE_APPEND | FF_MODE_CREATE)
* - Read and Write append mode access to the file. (Equivalent to "a+").
* .
* .
* Be careful when choosing modes. For those using FF_Open() at the application layer
* its best to use the provided FF_GetModeBits() function, as this complies to the same
* behaviour as the stdio.h fopen() function.
*
**/
/**
* @brief Opens a File for Access
*
* @param pxIOManager FF_IOManager_t object that was created by FF_CreateIOManager().
* @param pcPath Path to the File or object.
* @param ucMode Access Mode required. Modes are a little complicated, the function FF_GetModeBits()
* @param ucMode will convert a stdio Mode string into the equivalent Mode bits for this parameter.
* @param pxError Pointer to a signed byte for error checking. Can be NULL if not required.
* @param pxError To be checked when a NULL pointer is returned.
*
* @return NULL pointer on error, in which case pxError should be checked for more information.
**/
/* *INDENT-OFF* */
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
FF_FILE * FF_Open( FF_IOManager_t * pxIOManager,
const FF_T_WCHAR * pcPath,
uint8_t ucMode,
FF_Error_t * pxError )
#else
FF_FILE * FF_Open( FF_IOManager_t * pxIOManager,
const char * pcPath,
uint8_t ucMode,
FF_Error_t * pxError )
#endif
/* *INDENT-ON* */
{
FF_FILE * pxFile = NULL;
FF_FILE * pxFileChain;
FF_DirEnt_t xDirEntry;
uint32_t ulFileCluster;
FF_Error_t xError;
BaseType_t xIndex;
FF_FindParams_t xFindParams;
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
FF_T_WCHAR pcFileName[ ffconfigMAX_FILENAME ];
#else
char pcFileName[ ffconfigMAX_FILENAME ];
#endif
#if ( ffconfigPROTECT_FF_FOPEN_WITH_SEMAPHORE == 1 )
{
if( ( ucMode & FF_MODE_CREATE ) != 0U )
{
FF_PendSemaphore( pxIOManager->pvSemaphoreOpen );
}
}
#endif
memset( &xFindParams, '\0', sizeof( xFindParams ) );
/* Inform the functions that the entry will be created if not found. */
if( ( ucMode & FF_MODE_CREATE ) != 0 )
{
xFindParams.ulFlags |= FIND_FLAG_CREATE_FLAG;
}
if( pxIOManager == NULL )
{
/* Use the error function code 'FF_OPEN' as this static
* function is only called from that function. */
xError = FF_createERR( FF_ERR_NULL_POINTER, FF_OPEN );
}
#if ( ffconfigREMOVABLE_MEDIA != 0 )
else if( ( pxIOManager->ucFlags & FF_IOMAN_DEVICE_IS_EXTRACTED ) != 0 )
{
xError = FF_createERR( FF_ERR_IOMAN_DRIVER_NOMEDIUM, FF_OPEN );
}
#endif /* ffconfigREMOVABLE_MEDIA */
else
{
xError = FF_ERR_NONE;
/* Let xIndex point to the last occurrence of '/' or '\',
* to separate the path from the file name. */
xIndex = ( BaseType_t ) STRLEN( pcPath );
while( xIndex != 0 )
{
if( ( pcPath[ xIndex ] == '\\' ) || ( pcPath[ xIndex ] == '/' ) )
{
break;
}
xIndex--;
}
/* Copy the file name, i.e. the string that comes after the last separator. */
STRNCPY( pcFileName, pcPath + xIndex + 1, ffconfigMAX_FILENAME - 1 );
pcFileName[ ffconfigMAX_FILENAME - 1 ] = 0;
if( xIndex == 0 )
{
/* Only for the root, the slash is part of the directory name.
* 'xIndex' now equals to the length of the path name. */
xIndex = 1;
}
/* FF_CreateShortName() might set flags FIND_FLAG_FITS_SHORT and FIND_FLAG_SIZE_OK. */
FF_CreateShortName( &xFindParams, pcFileName );
/* Lookup the path and find the cluster pointing to the directory: */
xFindParams.ulDirCluster = FF_FindDir( pxIOManager, pcPath, ( uint16_t ) xIndex, &xError );
if( xFindParams.ulDirCluster == 0ul )
{
if( ( ucMode & FF_MODE_WRITE ) != 0 )
{
FF_PRINTF( "FF_Open[%s]: Path not found\n", pcPath );
}
/* The user tries to open a file but the path leading to the file does not exist. */
}
else if( FF_isERR( xError ) == pdFALSE )
{
/* Allocate an empty file handle and buffer space for 'unaligned access'. */
pxFile = prvAllocFileHandle( pxIOManager, &xError );
}
}
if( FF_isERR( xError ) == pdFALSE )
{
/* Copy the Mode Bits. */
pxFile->ucMode = ucMode;
/* See if the file does exist within the given directory. */
ulFileCluster = FF_FindEntryInDir( pxIOManager, &xFindParams, pcFileName, 0x00, &xDirEntry, &xError );
if( ulFileCluster == 0ul )
{
/* If cluster 0 was returned, it might be because the file has no allocated cluster,
* i.e. only a directory entry and no stored data. */
if( STRLEN( pcFileName ) == STRLEN( xDirEntry.pcFileName ) )
{
if( ( xDirEntry.ulFileSize == 0 ) && ( FF_strmatch( pcFileName, xDirEntry.pcFileName, ( BaseType_t ) STRLEN( pcFileName ) ) == pdTRUE ) )
{
/* It is the file, give it a pseudo cluster number '1'. */
ulFileCluster = 1;
/* And reset any error. */
xError = FF_ERR_NONE;
}
}
}
/* Test 'ulFileCluster' again, it might have been changed. */
if( ulFileCluster == 0ul )
{
/* The path is found, but it does not contain the file name yet.
* Maybe the user wants to create it? */
if( ( ucMode & FF_MODE_CREATE ) == 0 )
{
xError = FF_createERR( FF_ERR_FILE_NOT_FOUND, FF_OPEN );
}
else
{
ulFileCluster = FF_CreateFile( pxIOManager, &xFindParams, pcFileName, &xDirEntry, &xError );
if( FF_isERR( xError ) == pdFALSE )
{
xDirEntry.usCurrentItem += 1;
}
}
}
}
if( FF_isERR( xError ) == pdFALSE )
{
/* Now the file exists, or it has been created.
* Check if the Mode flags are allowed: */
if( ( xDirEntry.ucAttrib == FF_FAT_ATTR_DIR ) && ( ( ucMode & FF_MODE_DIR ) == 0 ) )
{
/* Not the object, File Not Found! */
xError = FF_createERR( FF_ERR_FILE_OBJECT_IS_A_DIR, FF_OPEN );
}
/*---------- Ensure Read-Only files don't get opened for Writing. */
else if( ( ( ucMode & ( FF_MODE_WRITE | FF_MODE_APPEND ) ) != 0 ) && ( ( xDirEntry.ucAttrib & FF_FAT_ATTR_READONLY ) != 0 ) )
{
xError = FF_createERR( FF_ERR_FILE_IS_READ_ONLY, FF_OPEN );
}
}
if( FF_isERR( xError ) == pdFALSE )
{
pxFile->pxIOManager = pxIOManager;
pxFile->ulFilePointer = 0;
/* Despite the warning output by MSVC - it is not possible to get here
* if xDirEntry has not been initialised. */
pxFile->ulObjectCluster = xDirEntry.ulObjectCluster;
pxFile->ulFileSize = xDirEntry.ulFileSize;
pxFile->ulCurrentCluster = 0;
pxFile->ulAddrCurrentCluster = pxFile->ulObjectCluster;
pxFile->pxNext = NULL;
pxFile->ulDirCluster = xFindParams.ulDirCluster;
pxFile->usDirEntry = xDirEntry.usCurrentItem - 1;
pxFile->ulChainLength = 0;
pxFile->ulEndOfChain = 0;
pxFile->ulValidFlags &= ~( FF_VALID_FLAG_DELETED );
/* Add pxFile onto the end of our linked list of FF_FILE objects.
* But first make sure that there are not 2 handles with write access
* to the same object. */
FF_PendSemaphore( pxIOManager->pvSemaphore );
{
pxFileChain = ( FF_FILE * ) pxIOManager->FirstFile;
if( pxFileChain == NULL )
{
pxIOManager->FirstFile = pxFile;
}
else
{
for( ; ; )
{
/* See if two file handles point to the same object. */
if( ( pxFileChain->ulObjectCluster == pxFile->ulObjectCluster ) &&
( pxFileChain->ulDirCluster == pxFile->ulDirCluster ) &&
( pxFileChain->usDirEntry == pxFile->usDirEntry ) )
{
/* Fail if any of the two has write access to the object. */
if( ( ( pxFileChain->ucMode | pxFile->ucMode ) & ( FF_MODE_WRITE | FF_MODE_APPEND ) ) != 0 )
{
/* File is already open! DON'T ALLOW IT! */
xError = FF_createERR( FF_ERR_FILE_ALREADY_OPEN, FF_OPEN );
break;
}
}
if( pxFileChain->pxNext == NULL )
{
pxFileChain->pxNext = pxFile;
break;
}
pxFileChain = ( FF_FILE * ) pxFileChain->pxNext;
}
}
}
FF_ReleaseSemaphore( pxIOManager->pvSemaphore );
}
if( FF_isERR( xError ) == pdFALSE )
{
/* If the file is opened with the truncate flag, truncate its contents. */
if( ( ucMode & FF_MODE_TRUNCATE ) != 0 )
{
/* Set the current size and position to zero. */
pxFile->ulFileSize = 0;
pxFile->ulFilePointer = 0;
}
}
if( FF_isERR( xError ) != pdFALSE )
{
if( pxFile != NULL )
{
#if ( ffconfigOPTIMISE_UNALIGNED_ACCESS != 0 )
{
ffconfigFREE( pxFile->pucBuffer );
}
#endif
ffconfigFREE( pxFile );
}
pxFile = NULL;
}
#if ( ffconfigPROTECT_FF_FOPEN_WITH_SEMAPHORE == 1 )
{
if( ( ucMode & FF_MODE_CREATE ) != 0U )
{
FF_ReleaseSemaphore( pxIOManager->pvSemaphoreOpen );
}
}
#endif
if( pxError != NULL )
{
*pxError = xError;
}
return pxFile;
} /* FF_Open() */
/*-----------------------------------------------------------*/
/**
* @brief Tests if a Directory contains any other files or folders.
*
* @param pxIOManager FF_IOManager_t object returned from the FF_CreateIOManager() function.
*
**/
/* *INDENT-OFF* */
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
BaseType_t FF_isDirEmpty( FF_IOManager_t * pxIOManager,
const FF_T_WCHAR * pcPath )
#else
BaseType_t FF_isDirEmpty( FF_IOManager_t * pxIOManager,
const char * pcPath )
#endif
/* *INDENT-ON* */
{
FF_DirEnt_t xDirEntry;
FF_Error_t xError = FF_ERR_NONE;
BaseType_t xReturn;
if( pxIOManager == NULL )
{
xReturn = pdFALSE;
}
else
{
xError = FF_FindFirst( pxIOManager, &xDirEntry, pcPath );
/* Assume the directory is empty until a file is
* encountered with a name other than ".." or "." */
xReturn = pdTRUE;
while( xError == 0 )
{
/* As we can't be sure the first 2 entries contain
* "." and "..", check it, not just count them
*/
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
if( ( wcscmp( xDirEntry.pcFileName, L".." ) != 0 ) && ( wcscmp( xDirEntry.pcFileName, L"." ) != 0 ) )
#else
if( ( strcmp( xDirEntry.pcFileName, ".." ) != 0 ) && ( strcmp( xDirEntry.pcFileName, "." ) != 0 ) )
#endif
{
xReturn = pdFALSE;
break;
}
xError = FF_FindNext( pxIOManager, &xDirEntry );
}
}
return xReturn;
} /* FF_isDirEmpty() */
/*-----------------------------------------------------------*/
#if ( ffconfigPATH_CACHE != 0 )
/* _HT_ After a directory has been renamed, the path cache becomes out-of-date */
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
static void FF_RmPathCache( FF_IOManager_t * pxIOManager,
const FF_T_WCHAR * pcPath )
#else
static void FF_RmPathCache( FF_IOManager_t * pxIOManager,
const char * pcPath )
#endif
{
/*
* The directory 'path' will be removed or renamed
* now clear all entries starting with 'path' in the path cache
*/
UBaseType_t pathLen = STRLEN( pcPath );
FF_PendSemaphore( pxIOManager->pvSemaphore );
{
for( UBaseType_t xIndex = 0; xIndex < ffconfigPATH_CACHE_DEPTH; xIndex++ )
{
UBaseType_t len2 = STRLEN( pxIOManager->xPartition.pxPathCache[ xIndex ].pcPath );
if( ( len2 >= pathLen ) && FF_strmatch( pxIOManager->xPartition.pxPathCache[ xIndex ].pcPath, pcPath, ( BaseType_t ) pathLen ) )
{
pxIOManager->xPartition.pxPathCache[ xIndex ].pcPath[ 0 ] = '\0';
pxIOManager->xPartition.pxPathCache[ xIndex ].ulDirCluster = 0;
}
}
}
FF_ReleaseSemaphore( pxIOManager->pvSemaphore );
}
#endif /* ffconfigPATH_CACHE */
/*-----------------------------------------------------------*/
/* *INDENT-OFF* */
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
FF_Error_t FF_RmDir( FF_IOManager_t * pxIOManager,
const FF_T_WCHAR * pcPath )
#else
FF_Error_t FF_RmDir( FF_IOManager_t * pxIOManager,
const char * pcPath )
#endif
/* *INDENT-ON* */
{
FF_FILE * pxFile;
uint8_t ucEntryBuffer[ 32 ];
FF_FetchContext_t xFetchContext;
FF_Error_t xError = FF_ERR_NONE;
if( pxIOManager == NULL )
{
xError = FF_createERR( FF_ERR_NULL_POINTER, FF_RMDIR );
}
#if ( ffconfigREMOVABLE_MEDIA != 0 )
else if( ( pxIOManager->ucFlags & FF_IOMAN_DEVICE_IS_EXTRACTED ) != 0 )
{
xError = FF_createERR( FF_ERR_IOMAN_DRIVER_NOMEDIUM, FF_RMDIR );
}
#endif /* ffconfigREMOVABLE_MEDIA */
else
{
pxFile = FF_Open( pxIOManager, pcPath, FF_MODE_DIR, &xError );
if( pxFile != NULL )
{
pxFile->ulValidFlags |= FF_VALID_FLAG_DELETED;
/* Clear the struct to allow a call to FF_CleanupEntryFetch() in any
* state. */
memset( &xFetchContext, '\0', sizeof( xFetchContext ) );
/* This task will get the unique right to change directories. */
FF_LockDirectory( pxIOManager );
do /* while( pdFALSE ) */
{
/* This while loop is only introduced to be able to use break
* statements. */
if( FF_isDirEmpty( pxIOManager, pcPath ) == pdFALSE )
{
xError = FF_createERR( FF_ERR_DIR_NOT_EMPTY, FF_RMDIR );
break;
}
FF_LockFAT( pxIOManager );
#if ( ffconfigHASH_CACHE != 0 )
{
/* A directory is removed so invalidate any hash table
* referring to this directory. */
FF_UnHashDir( pxIOManager, pxFile->ulObjectCluster );
}
#endif /* ffconfigHASH_CACHE */
{
/* Add parameter 0 to delete the entire chain!
* The actual directory entries on disk will be freed. */
xError = FF_UnlinkClusterChain( pxIOManager, pxFile->ulObjectCluster, 0 );
}
FF_UnlockFAT( pxIOManager );
if( FF_isERR( xError ) )
{
break;
}
/* Now remove this directory from its parent directory.
* Initialise the dirent Fetch Context object for faster removal of
* dirents. */
xError = FF_InitEntryFetch( pxIOManager, pxFile->ulDirCluster, &xFetchContext );
if( FF_isERR( xError ) )
{
break;
}
#if ( ffconfigHASH_CACHE != 0 )
{
/* Invalidate any hash table of the parent directory
* as well. */
FF_UnHashDir( pxIOManager, pxFile->ulDirCluster );
}
#endif /* ffconfigHASH_CACHE */
/* Edit the Directory Entry, so it will show as deleted.
* First remove the LFN entries: */
xError = FF_RmLFNs( pxIOManager, pxFile->usDirEntry, &xFetchContext );
if( FF_isERR( xError ) )
{
break;
}
/* And remove the Short file name entry: */
xError = FF_FetchEntryWithContext( pxIOManager, pxFile->usDirEntry, &xFetchContext, ucEntryBuffer );
if( FF_isERR( xError ) == pdFALSE )
{
ucEntryBuffer[ 0 ] = FF_FAT_DELETED;
FF_putShort( ucEntryBuffer, FF_FAT_DIRENT_CLUS_HIGH, ( uint32_t ) 0ul );
FF_putShort( ucEntryBuffer, FF_FAT_DIRENT_CLUS_LOW, ( uint32_t ) 0ul );
xError = FF_PushEntryWithContext( pxIOManager, pxFile->usDirEntry, &xFetchContext, ucEntryBuffer );
}
if( FF_isERR( xError ) )
{
break;
}
#if ( ffconfigPATH_CACHE != 0 )
{
/* We're removing a directory which might contain
* subdirectories. Instead of iterating through all
* subdirectories, just clear the path cache. */
FF_RmPathCache( pxIOManager, pcPath );
}
#endif
} while( pdFALSE );
{
FF_Error_t xTempError;
xTempError = FF_CleanupEntryFetch( pxIOManager, &xFetchContext );
if( FF_isERR( xError ) == pdFALSE )
{
xError = xTempError;
}
FF_UnlockDirectory( pxIOManager );
/* Free the file pointer resources. */
xTempError = FF_Close( pxFile );
if( FF_isERR( xError ) == pdFALSE )
{
xError = xTempError;
}
xTempError = FF_FlushCache( pxIOManager );
if( FF_isERR( xError ) == pdFALSE )
{
xError = xTempError;
}
}
} /* if( pxFile != NULL ) */
} /* else if( pxIOManager != NULL ) */
return xError;
} /* FF_RmDir() */
/*-----------------------------------------------------------*/
/* *INDENT-OFF* */
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
FF_Error_t FF_RmFile( FF_IOManager_t * pxIOManager,
const FF_T_WCHAR * pcPath )
#else
FF_Error_t FF_RmFile( FF_IOManager_t * pxIOManager,
const char * pcPath )
#endif
/* *INDENT-ON* */
{
FF_FILE * pxFile;
FF_Error_t xError = FF_ERR_NONE;
uint8_t ucEntryBuffer[ 32 ];
FF_FetchContext_t xFetchContext;
/* Opening the file-to-be-deleted in WR mode has two advantages:
* 1. The file handle gives all necessary information to delete it such
* as the data clusters and directory entries.
* 2. The file is now locked, it can not be opened by another task. */
pxFile = FF_Open( pxIOManager, pcPath, FF_MODE_WRITE, &xError );
if( pxFile != NULL )
{
/* FF_Close() will see this flag and won't do any disc access. */
pxFile->ulValidFlags |= FF_VALID_FLAG_DELETED;
/* Ensure there is actually a cluster chain to delete! */
if( pxFile->ulObjectCluster != 0 )
{
/* Lock the FAT so its thread-safe. */
FF_LockFAT( pxIOManager );
{
/* 0 to delete the entire chain! */
xError = FF_UnlinkClusterChain( pxIOManager, pxFile->ulObjectCluster, 0 );
}
FF_UnlockFAT( pxIOManager );
}
if( FF_isERR( xError ) == pdFALSE )
{
/* Clear the struct to allow a call to FF_CleanupEntryFetch() in any
* state. */
memset( &xFetchContext, '\0', sizeof( xFetchContext ) );
/* Get sole access to "directory changes" */
FF_LockDirectory( pxIOManager );
/* Edit the Directory Entry! (So it appears as deleted); */
do
{
xError = FF_InitEntryFetch( pxIOManager, pxFile->ulDirCluster, &xFetchContext );
if( FF_isERR( xError ) )
{
break;
}
#if ( ffconfigHASH_CACHE != 0 )
{
FF_UnHashDir( pxIOManager, pxFile->ulDirCluster );
}
#endif /* ffconfigHASH_CACHE */
/* Remove LFN entries, if any. */
xError = FF_RmLFNs( pxIOManager, ( uint16_t ) pxFile->usDirEntry, &xFetchContext );
if( FF_isERR( xError ) )
{
break;
}
/* Remove the Short file name entry. */
xError = FF_FetchEntryWithContext( pxIOManager, pxFile->usDirEntry, &xFetchContext, ucEntryBuffer );
if( FF_isERR( xError ) == pdFALSE )
{
ucEntryBuffer[ 0 ] = FF_FAT_DELETED;
FF_putShort( ucEntryBuffer, FF_FAT_DIRENT_CLUS_HIGH, ( uint32_t ) 0ul );
FF_putShort( ucEntryBuffer, FF_FAT_DIRENT_CLUS_LOW, ( uint32_t ) 0ul );
xError = FF_PushEntryWithContext( pxIOManager, pxFile->usDirEntry, &xFetchContext, ucEntryBuffer );
}
} while( pdFALSE );
{
FF_Error_t xTempError;
xTempError = FF_CleanupEntryFetch( pxIOManager, &xFetchContext );
if( FF_isERR( xError ) == pdFALSE )
{
xError = xTempError;
}
FF_UnlockDirectory( pxIOManager );
/* Free the file pointer resources. */
xTempError = FF_Close( pxFile );
if( FF_isERR( xError ) == pdFALSE )
{
xError = xTempError;
}
xTempError = FF_FlushCache( pxIOManager );
if( FF_isERR( xError ) == pdFALSE )
{
xError = xTempError;
}
}
}
} /* if( pxFile != NULL ) */
return xError;
} /* FF_RmFile() */
/*-----------------------------------------------------------*/
/**
* @brief Moves a file or directory from source to destination.
*
* @param pxIOManager The FF_IOManager_t object pointer.
* @param szSourceFile String of the source file to be moved or renamed.
* @param szDestinationFile String of the destination file to where the source should be moved or renamed.
*
* @retval FF_ERR_NONE on success.
* @retval FF_ERR_FILE_DESTINATION_EXISTS if the destination file exists.
* @retval FF_ERR_FILE_COULD_NOT_CREATE_DIRENT if dirent creation failed (fatal error!).
* @retval FF_ERR_FILE_DIR_NOT_FOUND if destination directory was not found.
* @retval FF_ERR_FILE_SOURCE_NOT_FOUND if the source file was not found.
*
**/
/* *INDENT-OFF* */
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
FF_Error_t FF_Move( FF_IOManager_t * pxIOManager,
const FF_T_WCHAR * szSourceFile,
const FF_T_WCHAR * szDestinationFile,
BaseType_t xDeleteIfExists )
#else
FF_Error_t FF_Move( FF_IOManager_t * pxIOManager,
const char * szSourceFile,
const char * szDestinationFile,
BaseType_t xDeleteIfExists )
#endif
/* *INDENT-ON* */
{
FF_Error_t xError;
FF_FILE * pSrcFile, * pxDestFile;
FF_DirEnt_t xMyFile;
uint8_t ucEntryBuffer[ 32 ];
UBaseType_t xIndex;
uint32_t ulDirCluster = 0ul;
FF_FetchContext_t xFetchContext;
#if ( ffconfigPATH_CACHE != 0 )
BaseType_t xIsDirectory = pdFALSE;
#endif
memset( &xFetchContext, '\0', sizeof( xFetchContext ) );
if( pxIOManager == NULL )
{
xError = FF_createERR( FF_ERR_NULL_POINTER, FF_MOVE );
}
#if ( ffconfigREMOVABLE_MEDIA != 0 )
else if( ( pxIOManager->ucFlags & FF_IOMAN_DEVICE_IS_EXTRACTED ) != 0 )
{
xError = FF_createERR( FF_ERR_IOMAN_DRIVER_NOMEDIUM, FF_MOVE );
}
#endif /* ffconfigREMOVABLE_MEDIA */
else
{
/* Check destination file doesn't exist! */
pxDestFile = FF_Open( pxIOManager, szDestinationFile, FF_MODE_READ, &xError );
if( ( pxDestFile != NULL ) || ( FF_GETERROR( xError ) == FF_ERR_FILE_OBJECT_IS_A_DIR ) )
{
xError = FF_createERR( FF_ERR_FILE_DESTINATION_EXISTS, FF_MOVE );
if( pxDestFile != NULL )
{
FF_Close( pxDestFile );
if( xDeleteIfExists != pdFALSE )
{
xError = FF_RmFile( pxIOManager, szDestinationFile );
}
}
}
else
{
/* Discard the error set by FF_Open().
* The target file (or directory) is not found: continue renaming. */
xError = FF_ERR_NONE;
}
}
if( FF_isERR( xError ) == pdFALSE )
{
/* About to move/rename 'szSourceFile'. When opening it with 'FF_MODE_WRITE'
* only succeeds if it has no other open handle to it. */
pSrcFile = FF_Open( pxIOManager, szSourceFile, FF_MODE_WRITE, &xError );
if( FF_GETERROR( xError ) == FF_ERR_FILE_OBJECT_IS_A_DIR )
{
/* Open a directory for moving! */
pSrcFile = FF_Open( pxIOManager, szSourceFile, FF_MODE_DIR, &xError );
#if ( ffconfigPATH_CACHE != 0 )
xIsDirectory = pdTRUE;
#endif
}
if( pSrcFile != NULL )
{
/* Collect information about the current directory entry. */
xError = FF_InitEntryFetch( pxIOManager, pSrcFile->ulDirCluster, &xFetchContext );
if( FF_isERR( xError ) == pdFALSE )
{
xError = FF_FetchEntryWithContext( pxIOManager, pSrcFile->usDirEntry, &xFetchContext, ucEntryBuffer );
if( FF_isERR( xError ) == pdFALSE )
{
xMyFile.ucAttrib = FF_getChar( ucEntryBuffer, ( uint16_t ) ( FF_FAT_DIRENT_ATTRIB ) );
xMyFile.ulFileSize = pSrcFile->ulFileSize;
xMyFile.ulObjectCluster = pSrcFile->ulObjectCluster;
xMyFile.usCurrentItem = 0;
xIndex = ( UBaseType_t ) STRLEN( szDestinationFile );
while( xIndex != 0 )
{
if( ( szDestinationFile[ xIndex ] == '\\' ) || ( szDestinationFile[ xIndex ] == '/' ) )
{
break;
}
xIndex--;
}
/* Copy the base name of the destination file. */
STRNCPY( xMyFile.pcFileName, ( szDestinationFile + xIndex + 1 ), ffconfigMAX_FILENAME - 1 );
xMyFile.pcFileName[ ffconfigMAX_FILENAME - 1 ] = 0;
if( xIndex == 0 )
{
xIndex = 1;
}
/* Find the (cluster of the) directory in which the target file will be located.
* It must exist before calling FF_Move(). */
ulDirCluster = FF_FindDir( pxIOManager, szDestinationFile, ( uint16_t ) xIndex, &xError );
}
}
}
if( FF_isERR( xError ) == pdFALSE )