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Transition FileX to Eclipse Fundation
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TiejunZhou
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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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/** File */
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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_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_file_attributes_set 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 file. If found, */
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/* the attribute set request is valid and the directory entry will be */
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/* modified with the new attributes. Otherwise, if the file is not */
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/* found, 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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/* file_name File name pointer */
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/* attributes New file attributes */
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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_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_file_attributes_set(FX_MEDIA *media_ptr, CHAR *file_name, UINT attributes)
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{
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UINT status;
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ULONG open_count;
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FX_FILE *search_ptr;
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FX_DIR_ENTRY dir_entry;
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UCHAR not_a_file_attr;
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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_file_attributes_sets++;
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#endif
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/* Setup pointer to media name buffer. */
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dir_entry.fx_dir_entry_name = media_ptr -> fx_media_name_buffer + FX_MAX_LONG_NAME_LEN;
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/* Clear the short name string. */
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dir_entry.fx_dir_entry_short_name[0] = 0;
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/* Check the media to make sure it is open. */
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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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not_a_file_attr = FX_DIRECTORY | FX_VOLUME;
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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_FILE_ATTRIBUTES_SET, media_ptr, file_name, attributes, 0, FX_TRACE_FILE_EVENTS, 0, 0)
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/* Protect against other threads accessing the media. */
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FX_PROTECT
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/* Check for write protect at the media level (set by driver). */
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if (media_ptr -> fx_media_driver_write_protect)
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{
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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 file name. */
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status = _fx_directory_search(media_ptr, file_name, &dir_entry, FX_NULL, FX_NULL);
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/* Determine if the search was successful. */
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if (status != FX_SUCCESS)
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{
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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 file. */
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if (dir_entry.fx_dir_entry_attributes & not_a_file_attr)
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{
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/* Release media protection. */
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FX_UNPROTECT
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/* Return the not a file error code. */
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return(FX_NOT_A_FILE);
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}
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/* Search the opened files to see if this file is currently
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opened. */
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open_count = media_ptr -> fx_media_opened_file_count;
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search_ptr = media_ptr -> fx_media_opened_file_list;
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while (open_count)
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{
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/* Look at each opened file to see if the same file is opened. */
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if ((search_ptr -> fx_file_dir_entry.fx_dir_entry_log_sector == dir_entry.fx_dir_entry_log_sector) &&
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(search_ptr -> fx_file_dir_entry.fx_dir_entry_byte_offset == dir_entry.fx_dir_entry_byte_offset))
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{
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/* Release media protection. */
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FX_UNPROTECT
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/* The file is currently open. */
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return(FX_ACCESS_ERROR);
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}
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/* Adjust the pointer and decrement the search count. */
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search_ptr = search_ptr -> fx_file_opened_next;
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open_count--;
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}
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/* Place the new attributes in the directory entry. */
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dir_entry.fx_dir_entry_attributes = (UCHAR)attributes;
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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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/* Now write out the directory entry. */
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status = _fx_directory_entry_write(media_ptr, &dir_entry);
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#ifdef FX_ENABLE_FAULT_TOLERANT
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/* Check for a bad status. */
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if (status != FX_SUCCESS)
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{
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FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
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/* Release media protection. */
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FX_UNPROTECT
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/* Return the bad status. */
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return(status);
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}
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/* End transaction. */
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status = _fx_fault_tolerant_transaction_end(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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/* File attribute set is complete, return status. */
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return(status);
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}
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