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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_file.h" |
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#include "fx_utility.h" |
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#include "fx_directory.h" |
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#ifndef FX_NO_LOCAL_PATH |
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FX_LOCAL_PATH_SETUP |
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#endif |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _fx_directory_local_path_set PORTABLE C */ |
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/* 6.1.5 */ |
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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 sets the local default directory of the media to the */ |
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/* path specified by the caller. If this path is not found, an error */ |
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/* code is returned. */ |
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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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/* local_path Local path control block ptr */ |
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/* new_path_name New path to set current local */ |
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/* working directory to */ |
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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_search Search for the directory name */ |
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/* in the directory structure */ |
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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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/* 03-02-2021 William E. Lamie Modified comment(s), */ |
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/* resulting in version 6.1.5 */ |
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/* */ |
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/**************************************************************************/ |
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UINT _fx_directory_local_path_set(FX_MEDIA *media_ptr, FX_LOCAL_PATH *local_path_ptr, CHAR *new_path_name) |
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{ |
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#ifndef FX_NO_LOCAL_PATH |
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UINT status; |
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CHAR *path_string_ptr; |
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UINT path_string_capacity; |
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FX_PATH *path_ptr; |
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UINT i, j; |
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#endif |
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FX_DIR_ENTRY dir_entry; |
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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_local_path_sets++; |
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#endif |
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/* Setup pointer to a 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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/* Setup the local path name buffer pointer. */ |
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local_path_ptr -> fx_path_directory.fx_dir_entry_name = local_path_ptr -> fx_path_name_buffer; |
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/* Clear the short name string. */ |
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dir_entry.fx_dir_entry_short_name[0] = (CHAR)0; |
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/* Clear the long name string. */ |
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dir_entry.fx_dir_entry_name[0] = (CHAR)0; |
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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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#ifdef FX_NO_LOCAL_PATH |
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FX_PARAMETER_NOT_USED(new_path_name); |
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/* Error, return to caller. */ |
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return(FX_NOT_IMPLEMENTED); |
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#else |
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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_LOCAL_PATH_SET, media_ptr, local_path_ptr, new_path_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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/* Look for a root directory selection. */ |
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✓✓✓✓
✓✓✓✓
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if ((!new_path_name) || (((new_path_name[0] == '\\') || (new_path_name[0] == '/')) && (new_path_name[1] == (CHAR)0))) |
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{ |
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/* Set the default local directory to the root. */ |
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local_path_ptr -> fx_path_directory.fx_dir_entry_name[0] = (CHAR)0; |
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local_path_ptr -> fx_path_string[0] = (CHAR)0; |
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local_path_ptr -> fx_path_string[FX_MAXIMUM_PATH - 2] = (CHAR)0; |
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/* Setup thread control block to use this local path pointer. */ |
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_tx_thread_current_ptr -> tx_thread_filex_ptr = (VOID *)local_path_ptr; |
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} |
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else |
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{ |
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/* Search the system for the supplied path and directory name. */ |
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status = _fx_directory_search(media_ptr, new_path_name, &dir_entry, FX_NULL, FX_NULL); |
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/* Determine if the search failed or if the entry found is not a |
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directory. */ |
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✓✓✓✓
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if ((status != FX_SUCCESS) || (!(dir_entry.fx_dir_entry_attributes & FX_DIRECTORY))) |
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{ |
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/* Release media protection. */ |
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FX_UNPROTECT |
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/* Invalid Path - Return the error code. */ |
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return(FX_INVALID_PATH); |
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} |
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/* Now update the current path string. */ |
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/* Setup the path string pointer to the start of the current path. */ |
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path_string_ptr = &(local_path_ptr -> fx_path_string[0]); |
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/* Setup the path string's capacity. */ |
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path_string_capacity = FX_MAXIMUM_PATH - 1; |
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/* Determine if the new path is relative from the current path. */ |
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✓✓✓✓
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if ((new_path_name[0] != '\\') && (new_path_name[0] != '/')) |
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{ |
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/* Yes, a relative path was found. */ |
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/* Setup the default path pointer to the local path. */ |
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path_ptr = local_path_ptr; |
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/* Determine if the local path is different than the current local path. */ |
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✓✓ |
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if (local_path_ptr != (FX_LOCAL_PATH *)_tx_thread_current_ptr -> tx_thread_filex_ptr) |
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{ |
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/* Yes, there is a difference. */ |
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/* Should we copy from the default media path or from the previous default |
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path. */ |
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✓✓ |
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if (_tx_thread_current_ptr -> tx_thread_filex_ptr) |
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{ |
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/* There is a local path so copy the relative path info from it. */ |
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i = 0; |
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do |
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{ |
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/* Copy from previous local to new local path. */ |
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local_path_ptr -> fx_path_string[i] = |
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((FX_LOCAL_PATH *)_tx_thread_current_ptr -> tx_thread_filex_ptr) -> fx_path_string[i]; |
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/* Determine if we are done. */ |
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✓✓ |
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if (local_path_ptr -> fx_path_string[i] == 0) |
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{ |
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/* Are we not at the end of the string? */ |
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✓✓ |
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if (i < (FX_MAXIMUM_PATH - 1)) |
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{ |
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/* Yes, break the loop. */ |
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break; |
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} |
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} |
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/* Move to the next character. */ |
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i++; |
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✓✓ |
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} while (i < FX_MAXIMUM_PATH); |
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} |
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else |
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{ |
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/* No local path, so copy the relative path information from the media |
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default. */ |
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i = 0; |
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do |
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{ |
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/* Copy from the media default to new local path. */ |
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local_path_ptr -> fx_path_string[i] = |
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media_ptr -> fx_media_default_path.fx_path_string[i]; |
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/* Determine if we are done. */ |
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✓✓ |
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if (local_path_ptr -> fx_path_string[i] == 0) |
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{ |
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240 |
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/* Are we not at the end of the string? */ |
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✓✓ |
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if (i < (FX_MAXIMUM_PATH - 1)) |
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{ |
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/* Yes, break the loop. */ |
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break; |
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} |
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} |
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/* Move to the next character. */ |
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i++; |
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✓✓ |
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} while (i < FX_MAXIMUM_PATH); |
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} |
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} |
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/* First, check the current path for string overflow. If this is set, |
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don't attempt to update the current path with relative information. |
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The path won't be valid again until a complete path is given. */ |
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✓✓ |
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if (path_ptr -> fx_path_string[FX_MAXIMUM_PATH - 2] == '*') |
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{ |
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/* Yes, don't update the string, just finish the path set processing. */ |
263 |
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264 |
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/* Determine if we are at the root directory. */ |
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✓✓ |
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if (!dir_entry.fx_dir_entry_cluster) |
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{ |
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/* Set the current directory back to the root directory. */ |
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4 |
dir_entry.fx_dir_entry_name[0] = (CHAR)0; |
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270 |
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/* Clear the current path string. */ |
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4 |
path_ptr -> fx_path_string[0] = (CHAR)0; |
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273 |
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/* Clear the overflow flag in the current path string... just in |
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case! */ |
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path_ptr -> fx_path_string[FX_MAXIMUM_PATH - 2] = (CHAR)0; |
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} |
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/* Copy the new directory entry into the media control block. */ |
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path_ptr -> fx_path_directory = dir_entry; |
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281 |
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/* Reset the local path name buffer pointer, since it was clobbered earlier. */ |
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local_path_ptr -> fx_path_directory.fx_dir_entry_name = local_path_ptr -> fx_path_name_buffer; |
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284 |
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/* Copy the directory name entry to the local path name area. */ |
285 |
✓✓ |
12079 |
for (j = 0; j < FX_MAX_LONG_NAME_LEN; j++) |
286 |
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{ |
287 |
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288 |
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/* Copy the name buffer. */ |
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12032 |
local_path_ptr -> fx_path_directory.fx_dir_entry_name[j] = dir_entry.fx_dir_entry_name[j]; |
290 |
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} |
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/* Setup thread control block to use this local path pointer. */ |
293 |
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_tx_thread_current_ptr -> tx_thread_filex_ptr = (VOID *)local_path_ptr; |
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/* Release media protection. */ |
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FX_UNPROTECT |
297 |
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298 |
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/* Default directory set is complete, return status. */ |
299 |
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47 |
return(FX_SUCCESS); |
300 |
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} |
301 |
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302 |
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/* Move the current path starting pointer to the end of the current |
303 |
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path string. */ |
304 |
✓✓✓✓
|
7325 |
while ((path_string_capacity) && (*path_string_ptr != FX_NULL)) |
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{ |
306 |
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7192 |
path_string_ptr++; |
307 |
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7192 |
path_string_capacity--; |
308 |
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} |
309 |
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310 |
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/* If room, place the \ character in the path string. */ |
311 |
✓✓ |
133 |
if (path_string_capacity) |
312 |
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{ |
313 |
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314 |
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/* There is room, place the directory marker in the string. */ |
315 |
|
132 |
*path_string_ptr++ = '\\'; |
316 |
|
132 |
path_string_capacity--; |
317 |
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} |
318 |
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} |
319 |
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else |
320 |
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{ |
321 |
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322 |
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/* Setup the default path pointer. */ |
323 |
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324 |
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/* Setup the default path pointer to the local path. */ |
325 |
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4 |
path_ptr = local_path_ptr; |
326 |
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327 |
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/* Complete path name given. Check to see if we need to clear an |
328 |
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overflow character from a previous current path string update. */ |
329 |
✓✓ |
4 |
if (path_ptr -> fx_path_string[FX_MAXIMUM_PATH - 2] == '*') |
330 |
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{ |
331 |
|
1 |
path_ptr -> fx_path_string[FX_MAXIMUM_PATH - 2] = (CHAR)0; |
332 |
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} |
333 |
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} |
334 |
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335 |
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/* Copy what we can into the current path. */ |
336 |
✓✓ |
3091 |
while (*new_path_name) |
337 |
|
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{ |
338 |
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339 |
|
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/* Determine if there is a ".." character sequence that specifies the |
340 |
|
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previous path. */ |
341 |
✓✓✓✓
|
2959 |
if ((*new_path_name == '.') && (*(new_path_name + 1) == '.')) |
342 |
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{ |
343 |
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344 |
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/* Yes, a backward path is found. The current path pointer |
345 |
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must be moved back to just after the previous \ character. */ |
346 |
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347 |
|
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/* Skip the current \0 that is at the end of the current path. */ |
348 |
|
6 |
path_string_capacity = path_string_capacity + 2; |
349 |
|
6 |
path_string_ptr = path_string_ptr - 2; |
350 |
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351 |
✓✓ |
109 |
while (path_string_capacity <= (FX_MAXIMUM_PATH - 1)) |
352 |
|
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{ |
353 |
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354 |
|
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/* Move the current path pointer backwards until |
355 |
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a \ character is found. */ |
356 |
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357 |
✓✓✓✓
|
107 |
if ((*path_string_ptr == '\\') || (*path_string_ptr == '/')) |
358 |
|
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{ |
359 |
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360 |
|
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/* Yes, we have successfully backed up one directory. */ |
361 |
|
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break; |
362 |
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} |
363 |
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364 |
|
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/* Backup another character. */ |
365 |
|
103 |
path_string_capacity++; |
366 |
|
103 |
path_string_ptr--; |
367 |
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} |
368 |
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369 |
|
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/* Adjust the new directory pointer past the .. characters */ |
370 |
|
6 |
new_path_name = new_path_name + 2; |
371 |
|
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} |
372 |
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else |
373 |
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{ |
374 |
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375 |
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/* Normal characters that need to be copied into the current path. */ |
376 |
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|
377 |
✓✓ |
2953 |
if (path_string_capacity) |
378 |
|
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{ |
379 |
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380 |
|
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/* Copy character from the new path into the current path string. */ |
381 |
|
2948 |
*path_string_ptr++ = *new_path_name++; |
382 |
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383 |
|
2948 |
path_string_capacity--; |
384 |
|
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} |
385 |
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else |
386 |
|
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{ |
387 |
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388 |
|
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/* No more room in the current path string! */ |
389 |
|
5 |
break; |
390 |
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} |
391 |
|
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} |
392 |
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} |
393 |
|
|
|
394 |
|
|
/* Determine if there is still room in the current path string. */ |
395 |
✓✓ |
137 |
if (path_string_capacity) |
396 |
|
|
{ |
397 |
|
|
|
398 |
|
|
/* Yes, there is still room, place a NULL character at the |
399 |
|
|
end of the path. */ |
400 |
|
130 |
*path_string_ptr = (CHAR)FX_NULL; |
401 |
|
|
} |
402 |
|
|
else |
403 |
|
|
{ |
404 |
|
|
|
405 |
|
|
/* No more room. Determine if the entire path was successfully |
406 |
|
|
copied into the current path. */ |
407 |
✓✓ |
7 |
if (*new_path_name) |
408 |
|
|
{ |
409 |
|
|
|
410 |
|
|
/* No, we couldn't fit the entire path. Place a "*" character |
411 |
|
|
at the end to indicate that we had overflow. Note that |
412 |
|
|
the path is kept just the the directory default get call, so |
413 |
|
|
the new default path is valid. */ |
414 |
|
5 |
path_ptr -> fx_path_string[FX_MAXIMUM_PATH - 2] = '*'; |
415 |
|
|
} |
416 |
|
|
} |
417 |
|
|
|
418 |
|
|
/* Determine if we are at the root directory. */ |
419 |
✓✓ |
137 |
if (!dir_entry.fx_dir_entry_cluster) |
420 |
|
|
{ |
421 |
|
|
/* Set the current directory back to the root directory. */ |
422 |
|
3 |
dir_entry.fx_dir_entry_name[0] = (CHAR)0; |
423 |
|
3 |
local_path_ptr -> fx_path_name_buffer[0] = (CHAR)0; |
424 |
|
|
} |
425 |
|
|
|
426 |
|
|
/* Copy the new directory entry into the media control block. */ |
427 |
|
137 |
path_ptr -> fx_path_directory = dir_entry; |
428 |
|
|
|
429 |
|
|
/* Reset the local path name buffer pointer, since it was clobbered earlier. */ |
430 |
|
137 |
local_path_ptr -> fx_path_directory.fx_dir_entry_name = local_path_ptr -> fx_path_name_buffer; |
431 |
|
|
|
432 |
|
|
/* Copy the directory name entry to the local path name area. */ |
433 |
✓✓ |
35209 |
for (j = 0; j < FX_MAX_LONG_NAME_LEN; j++) |
434 |
|
|
{ |
435 |
|
|
|
436 |
|
|
/* Copy the name buffer. */ |
437 |
|
35072 |
local_path_ptr -> fx_path_directory.fx_dir_entry_name[j] = dir_entry.fx_dir_entry_name[j]; |
438 |
|
|
} |
439 |
|
|
|
440 |
|
|
/* Setup thread control block to use this local path pointer. */ |
441 |
|
137 |
_tx_thread_current_ptr -> tx_thread_filex_ptr = (VOID *)local_path_ptr; |
442 |
|
|
} |
443 |
|
|
|
444 |
|
|
/* Release media protection. */ |
445 |
|
142 |
FX_UNPROTECT |
446 |
|
|
|
447 |
|
|
/* Default directory set is complete, return status. */ |
448 |
|
142 |
return(FX_SUCCESS); |
449 |
|
|
#endif |
450 |
|
|
} |
451 |
|
|
|