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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** FileX Component */
/** */
/** File */
/** */
/**************************************************************************/
/**************************************************************************/
#define FX_SOURCE_CODE
/* Include necessary system files. */
#include "fx_api.h"
#include "fx_system.h"
#include "fx_directory.h"
#include "fx_file.h"
#include "fx_utility.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _fx_file_attributes_read PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function first attempts to find the specified file. If found, */
/* the attribute read request is valid and the directory entry will be */
/* in order to pickup the file's attributes. Otherwise, if the file */
/* is not found, the appropriate error code is returned to the caller. */
/* */
/* INPUT */
/* */
/* media_ptr Media control block pointer */
/* file_name File name pointer */
/* attributes_ptr Return attributes pointer */
/* */
/* OUTPUT */
/* */
/* return status */
/* */
/* CALLS */
/* */
/* _fx_directory_search Search for the file name in */
/* the directory structure */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 William E. Lamie Initial Version 6.0 */
/* 09-30-2020 William E. Lamie Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _fx_file_attributes_read(FX_MEDIA *media_ptr, CHAR *file_name, UINT *attributes_ptr)
{
UINT status;
FX_DIR_ENTRY dir_entry;
#ifdef TX_ENABLE_EVENT_TRACE
TX_TRACE_BUFFER_ENTRY *trace_event;
ULONG trace_timestamp;
#endif
UCHAR not_a_file_attr;
#ifndef FX_MEDIA_STATISTICS_DISABLE
/* Increment the number of times this service has been called. */
media_ptr -> fx_media_file_attributes_reads++;
#endif
/* Setup pointer to media name buffer. */
dir_entry.fx_dir_entry_name = media_ptr -> fx_media_name_buffer + FX_MAX_LONG_NAME_LEN;
/* Clear the short name string. */
dir_entry.fx_dir_entry_short_name[0] = 0;
/* Check the media to make sure it is open. */
if (media_ptr -> fx_media_id != FX_MEDIA_ID)
{
/* Return the media not opened error. */
return(FX_MEDIA_NOT_OPEN);
}
#ifdef FX_ENABLE_EXFAT
if (media_ptr -> fx_media_FAT_type == FX_exFAT)
{
not_a_file_attr = FX_DIRECTORY;
}
else
{
#endif /* FX_ENABLE_EXFAT */
not_a_file_attr = FX_DIRECTORY | FX_VOLUME;
#ifdef FX_ENABLE_EXFAT
}
#endif /* FX_ENABLE_EXFAT */
/* If trace is enabled, insert this event into the trace buffer. */
FX_TRACE_IN_LINE_INSERT(FX_TRACE_FILE_ATTRIBUTES_READ, media_ptr, file_name, 0, 0, FX_TRACE_FILE_EVENTS, &trace_event, &trace_timestamp)
/* Protect against other threads accessing the media. */
FX_PROTECT
/* Search the system for the supplied file name. */
status = _fx_directory_search(media_ptr, file_name, &dir_entry, FX_NULL, FX_NULL);
/* Determine if the search was successful. */
if (status != FX_SUCCESS)
{
/* Release media protection. */
FX_UNPROTECT
/* Return the error code. */
return(status);
}
/* Check to make sure the found entry is a file. */
if (dir_entry.fx_dir_entry_attributes & not_a_file_attr)
{
/* Release media protection. */
FX_UNPROTECT
/* Return the not a file error code. */
return(FX_NOT_A_FILE);
}
/* Place the current attributes into the destination. */
*attributes_ptr = (UINT)dir_entry.fx_dir_entry_attributes;
/* Update the trace event with the attributes read. */
FX_TRACE_EVENT_UPDATE(trace_event, trace_timestamp, FX_TRACE_FILE_ATTRIBUTES_READ, 0, 0, dir_entry.fx_dir_entry_attributes, 0)
/* Release media protection. */
FX_UNPROTECT
/* File attribute read is complete, return successful status. */
return(FX_SUCCESS);
}