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/**************************************************************************/ |
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/* */ |
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/* Copyright (c) Microsoft Corporation. All rights reserved. */ |
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/* */ |
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/* This software is licensed under the Microsoft Software License */ |
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/* Terms for Microsoft Azure RTOS. Full text of the license can be */ |
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/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */ |
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/* and in the root directory of this software. */ |
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/* */ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/** */ |
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/** FileX Component */ |
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/** */ |
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/** Directory */ |
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/** */ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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#define FX_SOURCE_CODE |
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/* Include necessary system files. */ |
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#include "fx_api.h" |
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#include "fx_system.h" |
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#include "fx_directory.h" |
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#include "fx_file.h" |
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#include "fx_utility.h" |
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#ifdef FX_ENABLE_EXFAT |
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#include "fx_directory_exFAT.h" |
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#endif /* FX_ENABLE_EXFAT */ |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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#include "fx_fault_tolerant.h" |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _fx_directory_rename PORTABLE C */ |
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/* 6.1 */ |
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/* AUTHOR */ |
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/* */ |
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/* William E. Lamie, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* This function first attempts to find the specified directory. */ |
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/* If found, the rename request is valid and the directory will be */ |
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/* changed to the new name. Otherwise, if the directory is not found, */ |
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/* the appropriate error code is returned to the caller. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* media_ptr Media control block pointer */ |
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/* old_directory_name Old file directory pointer */ |
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/* new_directory_name New file directory pointer */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* return status */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* _fx_directory_entry_write Write the new directory entry */ |
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/* _fx_directory_free_search Search for a free directory */ |
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/* entry */ |
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/* _fx_directory_name_extract Extract directory name */ |
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/* _fx_directory_search Search for the file name in */ |
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/* the directory structure */ |
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/* _fx_fault_tolerant_transaction_start Start fault tolerant */ |
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/* transaction */ |
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/* _fx_fault_tolerant_transaction_end End fault tolerant transaction*/ |
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/* _fx_fault_tolerant_recover Recover FAT chain */ |
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/* _fx_fault_tolerant_reset_log_file Reset the log file */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* Application Code */ |
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/* */ |
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/* RELEASE HISTORY */ |
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/* */ |
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/* DATE NAME DESCRIPTION */ |
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/* */ |
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/* 05-19-2020 William E. Lamie Initial Version 6.0 */ |
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/* 09-30-2020 William E. Lamie Modified comment(s), */ |
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/* resulting in version 6.1 */ |
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/* */ |
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/**************************************************************************/ |
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UINT _fx_directory_rename(FX_MEDIA *media_ptr, CHAR *old_directory_name, CHAR *new_directory_name) |
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{ |
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UINT status; |
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FX_DIR_ENTRY old_dir_entry; |
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FX_DIR_ENTRY new_dir_entry; |
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FX_DIR_ENTRY search_directory; |
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CHAR *new_name_ptr; |
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ULONG i; |
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CHAR *work_ptr; |
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CHAR alpha, beta; |
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#ifdef FX_RENAME_PATH_INHERIT |
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UINT j; |
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#endif |
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#ifndef FX_MEDIA_STATISTICS_DISABLE |
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/* Increment the number of times this service has been called. */ |
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media_ptr -> fx_media_directory_renames++; |
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#endif |
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/* Setup pointers to media name buffers. */ |
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old_dir_entry.fx_dir_entry_name = media_ptr -> fx_media_name_buffer + FX_MAX_LONG_NAME_LEN; |
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new_dir_entry.fx_dir_entry_name = media_ptr -> fx_media_name_buffer + FX_MAX_LONG_NAME_LEN * 2; |
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search_directory.fx_dir_entry_name = media_ptr -> fx_media_name_buffer + FX_MAX_LONG_NAME_LEN * 3; |
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/* Clear the short name strings. */ |
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old_dir_entry.fx_dir_entry_short_name[0] = 0; |
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new_dir_entry.fx_dir_entry_short_name[0] = 0; |
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search_directory.fx_dir_entry_short_name[0] = 0; |
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/* Determine if the supplied name is less than the maximum supported name size. The |
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maximum name (FX_MAX_LONG_NAME_LEN) is defined in fx_api.h. */ |
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i = 0; |
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work_ptr = (CHAR *)new_directory_name; |
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✓✓✓✓
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while (*work_ptr && (i < FX_MAX_LONG_NAME_LEN)) |
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{ |
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/* Determine if the character designates a new path. */ |
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✓✓✓✓
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if ((*work_ptr == '\\') || (*work_ptr == '/')) |
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{ |
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/* Yes, reset the name size. */ |
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i = 0; |
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} |
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/* Check for leading spaces. */ |
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✓✓✓✓
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else if ((*work_ptr != ' ') || (i != 0)) |
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{ |
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/* No leading spaces, increment the name size. */ |
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i++; |
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} |
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/* Move to the next character. */ |
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work_ptr++; |
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} |
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/* Determine if the supplied name is valid. */ |
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✓✓✓✓
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if ((i == 0) || (i >= FX_MAX_LONG_NAME_LEN)) |
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{ |
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/* Return an invalid name value. */ |
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return(FX_INVALID_NAME); |
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} |
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/* Check the media to make sure it is open. */ |
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✓✓ |
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if (media_ptr -> fx_media_id != FX_MEDIA_ID) |
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{ |
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/* Return the media not opened error. */ |
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return(FX_MEDIA_NOT_OPEN); |
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} |
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/* If trace is enabled, insert this event into the trace buffer. */ |
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FX_TRACE_IN_LINE_INSERT(FX_TRACE_DIRECTORY_RENAME, media_ptr, old_directory_name, new_directory_name, 0, FX_TRACE_DIRECTORY_EVENTS, 0, 0) |
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/* Protect against other threads accessing the media. */ |
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FX_PROTECT |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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/* Start transaction. */ |
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_fx_fault_tolerant_transaction_start(media_ptr); |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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/* Check for write protect at the media level (set by driver). */ |
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✓✓ |
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if (media_ptr -> fx_media_driver_write_protect) |
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{ |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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/* Release media protection. */ |
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FX_UNPROTECT |
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/* Return write protect error. */ |
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return(FX_WRITE_PROTECT); |
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} |
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/* Search the system for the supplied directory name. */ |
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status = _fx_directory_search(media_ptr, old_directory_name, &old_dir_entry, &search_directory, FX_NULL); |
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/* Determine if the search was successful. */ |
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✓✓ |
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if (status != FX_SUCCESS) |
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{ |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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/* Release media protection. */ |
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FX_UNPROTECT |
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/* Return the error code. */ |
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return(status); |
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} |
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/* Check to make sure the found entry is a directory. */ |
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✓✓ |
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if (!(old_dir_entry.fx_dir_entry_attributes & (UCHAR)(FX_DIRECTORY))) |
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{ |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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/* Release media protection. */ |
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FX_UNPROTECT |
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/* Return the not a directory error code. */ |
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return(FX_NOT_DIRECTORY); |
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} |
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#ifdef FX_RENAME_PATH_INHERIT |
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/* Determine if the source directory name has a path and the target directory name does not. */ |
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if (((old_directory_name[0] == '/') || (old_directory_name[0] == '\\')) && (new_directory_name[0] != '/') && (new_directory_name[0] != '\\')) |
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{ |
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/* In this case, we need to prepend the path of the old directory name to that of the new directory name. */ |
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/* Setup pointer to the rename buffer. */ |
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work_ptr = (CHAR *)media_ptr -> fx_media_rename_buffer; |
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/* First, copy the path of the old directory name. */ |
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i = 0; |
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j = 0; |
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while ((old_directory_name[i]) && (i < FX_MAXIMUM_PATH)) |
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{ |
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/* Copy a character into the rename buffer. */ |
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*work_ptr++ = old_directory_name[i]; |
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/* Determine if this character is directory separator. */ |
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if ((old_directory_name[i] == '/') || (old_directory_name[i] == '\\')) |
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{ |
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/* Yes, directory separator has been found - remember the index. */ |
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j = i; |
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} |
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/* Move to next position in the old directory name. */ |
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i++; |
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} |
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/* At this point, we have the path stored in the rename buffer. */ |
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/* Position past the last slash or backslash. */ |
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j++; |
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/* Reset the working pointer to the position after the last directory separator. */ |
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work_ptr = (CHAR *)&(media_ptr -> fx_media_rename_buffer[j]); |
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/* Now copy the new directory name into the rename buffer. */ |
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i = 0; |
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while ((new_directory_name[i]) && (j < FX_MAXIMUM_PATH)) |
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{ |
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/* Copy a character into the rename buffer. */ |
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*work_ptr++ = new_directory_name[i]; |
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/* Move to next character. */ |
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i++; |
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j++; |
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} |
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/* Determine if the path was successfully prepended. */ |
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if (new_directory_name[i]) |
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{ |
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/* No, there was not enough room in the destination buffer. */ |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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/* Release media protection. */ |
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FX_UNPROTECT |
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/* Return the invalid path error code. */ |
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return(FX_INVALID_PATH); |
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} |
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/* Place a NULL at the end of the string. */ |
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*work_ptr = (CHAR)FX_NULL; |
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/* At this point, we have successfully prepended the path in the new directory name, override |
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the new directory name so it is used from now on. */ |
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new_directory_name = (CHAR *)media_ptr -> fx_media_rename_buffer; |
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} |
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#endif |
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/* Search the media for the new directory name - including any supplied path. */ |
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status = _fx_directory_search(media_ptr, new_directory_name, &new_dir_entry, &search_directory, &new_name_ptr); |
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/* Determine if the search found anything. */ |
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✓✓ |
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if (status == FX_SUCCESS) |
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{ |
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313 |
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/* Determine if the new name simply has an ASCII case change. If so, simply let the processing |
314 |
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continue. */ |
315 |
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i = 0; |
316 |
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do |
317 |
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{ |
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319 |
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/* Pickup an old name and new name character and convert to upper case if necessary. */ |
320 |
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alpha = old_directory_name[i]; |
321 |
✓✓✓✓
|
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if ((alpha >= 'a') && (alpha <= 'z')) |
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{ |
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324 |
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/* Lower case, convert to upper case! */ |
325 |
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alpha = (CHAR)((INT)alpha - 0x20); |
326 |
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} |
327 |
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375 |
beta = new_directory_name[i]; |
328 |
✓✓✓✓
|
375 |
if ((beta >= 'a') && (beta <= 'z')) |
329 |
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{ |
330 |
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331 |
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/* Lower case, convert to upper case! */ |
332 |
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315 |
beta = (CHAR)((INT)beta - 0x20); |
333 |
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} |
334 |
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335 |
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/* Now compare the characters. */ |
336 |
✓✓✓✓
|
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if ((alpha != beta) || (alpha == 0)) |
337 |
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{ |
338 |
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339 |
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/* Get out of this loop! */ |
340 |
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break; |
341 |
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} |
342 |
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343 |
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/* Move to next character. */ |
344 |
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318 |
i++; |
345 |
✓✓ |
318 |
} while (i < (FX_MAXIMUM_PATH-1)); |
346 |
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347 |
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/* Now determine if the names match. */ |
348 |
✓✓ |
58 |
if (alpha != beta) |
349 |
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{ |
350 |
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351 |
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/* Yes, the directory name already exists in the target location. */ |
352 |
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353 |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
354 |
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FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
355 |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
356 |
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357 |
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/* Release media protection. */ |
358 |
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43 |
FX_UNPROTECT |
359 |
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360 |
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/* Return the error code. */ |
361 |
|
43 |
return(FX_ALREADY_CREATED); |
362 |
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} |
363 |
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} |
364 |
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365 |
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/* Make sure the name is valid. */ |
366 |
✓✓ |
37 |
if (_fx_directory_name_extract(new_name_ptr, &new_dir_entry.fx_dir_entry_name[0])) |
367 |
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{ |
368 |
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369 |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
370 |
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FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
371 |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
372 |
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373 |
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/* Release media protection */ |
374 |
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1 |
FX_UNPROTECT |
375 |
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376 |
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/* Return the error code */ |
377 |
|
1 |
return(FX_INVALID_NAME); |
378 |
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} |
379 |
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380 |
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/* Look for a free slot in the target directory. */ |
381 |
|
36 |
status = _fx_directory_free_search(media_ptr, &search_directory, &new_dir_entry); |
382 |
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383 |
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/* Was a free slot found? */ |
384 |
✓✓ |
36 |
if (status != FX_SUCCESS) |
385 |
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{ |
386 |
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387 |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
388 |
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FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
389 |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
390 |
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|
391 |
|
|
/* No, release protection. */ |
392 |
|
2 |
FX_UNPROTECT |
393 |
|
|
|
394 |
|
|
/* Return the error code. */ |
395 |
|
2 |
return(status); |
396 |
|
|
} |
397 |
|
|
|
398 |
|
|
/* Extract the new directory name. */ |
399 |
|
34 |
_fx_directory_name_extract(new_name_ptr, &new_dir_entry.fx_dir_entry_name[0]); |
400 |
|
|
|
401 |
|
|
/* Determine if the name was a long directory name. */ |
402 |
✓✓ |
34 |
if (new_dir_entry.fx_dir_entry_long_name_present) |
403 |
|
|
{ |
404 |
|
|
|
405 |
|
|
/* Yes, clear the short directory name to force a new one. */ |
406 |
|
33 |
new_dir_entry.fx_dir_entry_short_name[0] = 0; |
407 |
|
|
} |
408 |
|
|
|
409 |
|
|
/* Setup new attributes for the new directory entry. */ |
410 |
|
34 |
new_dir_entry.fx_dir_entry_attributes = old_dir_entry.fx_dir_entry_attributes; |
411 |
|
34 |
new_dir_entry.fx_dir_entry_cluster = old_dir_entry.fx_dir_entry_cluster; |
412 |
|
34 |
new_dir_entry.fx_dir_entry_file_size = old_dir_entry.fx_dir_entry_file_size; |
413 |
|
|
|
414 |
|
|
/* Save the reserved field. */ |
415 |
|
34 |
new_dir_entry.fx_dir_entry_reserved = old_dir_entry.fx_dir_entry_reserved; |
416 |
|
|
|
417 |
|
|
/* Set time and date stamps. */ |
418 |
|
34 |
new_dir_entry.fx_dir_entry_created_time_ms = old_dir_entry.fx_dir_entry_created_time_ms; |
419 |
|
34 |
new_dir_entry.fx_dir_entry_created_time = old_dir_entry.fx_dir_entry_created_time; |
420 |
|
34 |
new_dir_entry.fx_dir_entry_created_date = old_dir_entry.fx_dir_entry_created_date; |
421 |
|
34 |
new_dir_entry.fx_dir_entry_last_accessed_date = old_dir_entry.fx_dir_entry_last_accessed_date; |
422 |
|
34 |
new_dir_entry.fx_dir_entry_time = old_dir_entry.fx_dir_entry_time; |
423 |
|
34 |
new_dir_entry.fx_dir_entry_date = old_dir_entry.fx_dir_entry_date; |
424 |
|
|
|
425 |
|
|
#ifdef FX_ENABLE_EXFAT |
426 |
|
|
if (media_ptr -> fx_media_FAT_type == FX_exFAT) |
427 |
|
|
{ |
428 |
|
|
|
429 |
|
|
new_dir_entry.fx_dir_entry_dont_use_fat = old_dir_entry.fx_dir_entry_dont_use_fat; |
430 |
|
|
new_dir_entry.fx_dir_entry_type = old_dir_entry.fx_dir_entry_type; |
431 |
|
|
new_dir_entry.fx_dir_entry_available_file_size = old_dir_entry.fx_dir_entry_available_file_size; |
432 |
|
|
new_dir_entry.fx_dir_entry_secondary_count = old_dir_entry.fx_dir_entry_secondary_count; |
433 |
|
|
} |
434 |
|
|
#endif /* FX_ENABLE_EXFAT */ |
435 |
|
|
|
436 |
|
|
/* Is there a leading dot? */ |
437 |
✓✓ |
34 |
if (new_dir_entry.fx_dir_entry_name[0] == '.') |
438 |
|
|
{ |
439 |
|
|
|
440 |
|
|
/* Yes, toggle the hidden attribute bit. */ |
441 |
|
1 |
new_dir_entry.fx_dir_entry_attributes |= FX_HIDDEN; |
442 |
|
|
} |
443 |
|
|
|
444 |
|
|
#ifndef FX_MEDIA_DISABLE_SEARCH_CACHE |
445 |
|
|
|
446 |
|
|
/* Invalidate the directory cache. */ |
447 |
|
34 |
media_ptr -> fx_media_last_found_name[0] = FX_NULL; |
448 |
|
|
#endif |
449 |
|
|
|
450 |
|
|
/* Now write out the directory entry. */ |
451 |
|
|
#ifdef FX_ENABLE_EXFAT |
452 |
|
|
if (media_ptr -> fx_media_FAT_type == FX_exFAT) |
453 |
|
|
{ |
454 |
|
|
|
455 |
|
|
status = _fx_directory_exFAT_entry_write(media_ptr, &new_dir_entry, UPDATE_FULL); |
456 |
|
|
} |
457 |
|
|
else |
458 |
|
|
{ |
459 |
|
|
#endif /* FX_ENABLE_EXFAT */ |
460 |
|
34 |
status = _fx_directory_entry_write(media_ptr, &new_dir_entry); |
461 |
|
|
#ifdef FX_ENABLE_EXFAT |
462 |
|
|
} |
463 |
|
|
#endif /* FX_ENABLE_EXFAT */ |
464 |
|
|
|
465 |
|
|
/* Determine if the write was successful. */ |
466 |
✓✓ |
34 |
if (status != FX_SUCCESS) |
467 |
|
|
{ |
468 |
|
|
|
469 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
470 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
471 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
472 |
|
|
|
473 |
|
|
/* Release media protection. */ |
474 |
|
1 |
FX_UNPROTECT |
475 |
|
|
|
476 |
|
|
/* Return the error code. */ |
477 |
|
1 |
return(status); |
478 |
|
|
} |
479 |
|
|
|
480 |
|
|
/* Set the old directory entry to free. */ |
481 |
|
33 |
old_dir_entry.fx_dir_entry_name[0] = (CHAR)FX_DIR_ENTRY_FREE; |
482 |
|
33 |
old_dir_entry.fx_dir_entry_short_name[0] = (CHAR)FX_DIR_ENTRY_FREE; |
483 |
|
|
|
484 |
|
|
/* Now wipe out the old directory entry. */ |
485 |
|
|
#ifdef FX_ENABLE_EXFAT |
486 |
|
|
if (media_ptr -> fx_media_FAT_type == FX_exFAT) |
487 |
|
|
{ |
488 |
|
|
|
489 |
|
|
status = _fx_directory_exFAT_entry_write(media_ptr, &old_dir_entry, UPDATE_DELETE); |
490 |
|
|
} |
491 |
|
|
else |
492 |
|
|
{ |
493 |
|
|
#endif /* FX_ENABLE_EXFAT */ |
494 |
|
33 |
status = _fx_directory_entry_write(media_ptr, &old_dir_entry); |
495 |
|
|
#ifdef FX_ENABLE_EXFAT |
496 |
|
|
} |
497 |
|
|
#endif /* FX_ENABLE_EXFAT */ |
498 |
|
|
|
499 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
500 |
|
|
/* Check for a bad status. */ |
501 |
|
|
if (status != FX_SUCCESS) |
502 |
|
|
{ |
503 |
|
|
|
504 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
505 |
|
|
|
506 |
|
|
/* Release media protection. */ |
507 |
|
|
FX_UNPROTECT |
508 |
|
|
|
509 |
|
|
/* Return the bad status. */ |
510 |
|
|
return(status); |
511 |
|
|
} |
512 |
|
|
|
513 |
|
|
/* End transaction. */ |
514 |
|
|
status = _fx_fault_tolerant_transaction_end(media_ptr); |
515 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
516 |
|
|
|
517 |
|
|
/* Release media protection. */ |
518 |
|
33 |
FX_UNPROTECT |
519 |
|
|
|
520 |
|
|
/* Directory rename is complete, return status. */ |
521 |
|
33 |
return(status); |
522 |
|
|
} |
523 |
|
|
|