Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	fx_directory_delete.c	Lines:	79	79	100.0 %
Date:	2024-03-11 05:15:45	Branches:	42	42	100.0 %


/***************************************************************************
 * Copyright (c) 2024 Microsoft Corporation
 *
 * This program and the accompanying materials are made available under the
 * terms of the MIT License which is available at
 * https://opensource.org/licenses/MIT.
 *
 * SPDX-License-Identifier: MIT
 **************************************************************************/


/**************************************************************************/
/**************************************************************************/
/**                                                                       */
/** FileX Component                                                       */
/**                                                                       */
/**   Directory                                                           */
/**                                                                       */
/**************************************************************************/
/**************************************************************************/

#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"
#ifdef FX_ENABLE_FAULT_TOLERANT
#include "fx_fault_tolerant.h"
#endif /* FX_ENABLE_FAULT_TOLERANT */


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _fx_directory_delete                                PORTABLE C      */
/*                                                           6.1          */
/*  AUTHOR                                                                */
/*                                                                        */
/*    William E. Lamie, Microsoft Corporation                             */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function first attempts to find the specified directory.       */
/*    If found, the directory is examined to make sure it is empty.  If   */
/*    the directory is not empty, an error code is returned to the        */
/*    caller.  Otherwise, the directory will be deleted and its clusters  */
/*    will be made available.                                             */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    media_ptr                             Media control block pointer   */
/*    directory_name                        Directory name to delete      */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    return status                                                       */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _fx_directory_entry_read              Read a directory entry        */
/*    _fx_directory_entry_write             Write the new directory entry */
/*    _fx_directory_search                  Search for the file name in   */
/*                                          the directory structure       */
/*    _fx_utility_logical_sector_flush      Flush the written log sector  */
/*    _fx_utility_FAT_entry_read            Read FAT entries to calculate */
/*                                            the sub-directory size      */
/*    _fx_utility_FAT_entry_write           Write FAT entry               */
/*    _fx_utility_FAT_flush                 Flush FAT cache               */
/*    _fx_fault_tolerant_transaction_start  Start fault tolerant          */
/*                                            transaction                 */
/*    _fx_fault_tolerant_transaction_end    End fault tolerant transaction*/
/*    _fx_fault_tolerant_recover            Recover FAT chain             */
/*    _fx_fault_tolerant_reset_log_file     Reset the log file            */
/*                                                                        */
/*  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_directory_delete(FX_MEDIA *media_ptr, CHAR *directory_name)
{

UINT         status;
ULONG        cluster, next_cluster;
ULONG        i, directory_size;
FX_DIR_ENTRY dir_entry;
FX_DIR_ENTRY search_directory;
FX_DIR_ENTRY search_entry;



#ifndef FX_MEDIA_STATISTICS_DISABLE

    /* Increment the number of times this service has been called.  */
    media_ptr -> fx_media_directory_deletes++;
#endif

    /* Setup pointer to media name buffer.  */
    dir_entry.fx_dir_entry_name =  media_ptr -> fx_media_name_buffer + FX_MAX_LONG_NAME_LEN;

    /* Setup search pointer to media name buffer.  */
    search_directory.fx_dir_entry_name =  media_ptr -> fx_media_name_buffer + FX_MAX_LONG_NAME_LEN * 2;

    /* Setup search entry pointer to media name buffer.  */
    search_entry.fx_dir_entry_name =  media_ptr -> fx_media_name_buffer + FX_MAX_LONG_NAME_LEN * 3;

    /* Clear the short name string of the three file names that will be worked with.  */
    dir_entry.fx_dir_entry_short_name[0] =  0;
    search_directory.fx_dir_entry_short_name[0] =  0;
    search_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);
    }

    /* If trace is enabled, insert this event into the trace buffer.  */
    FX_TRACE_IN_LINE_INSERT(FX_TRACE_DIRECTORY_DELETE, media_ptr, directory_name, 0, 0, FX_TRACE_DIRECTORY_EVENTS, 0, 0)

    /* Protect against other threads accessing the media.  */
    FX_PROTECT

#ifdef FX_ENABLE_FAULT_TOLERANT
    /* Start transaction. */
    _fx_fault_tolerant_transaction_start(media_ptr);
#endif /* FX_ENABLE_FAULT_TOLERANT */

    /* Check for write protect at the media level (set by driver).  */
    if (media_ptr -> fx_media_driver_write_protect)
    {

#ifdef FX_ENABLE_FAULT_TOLERANT
        FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif /* FX_ENABLE_FAULT_TOLERANT */

        /* Release media protection.  */
        FX_UNPROTECT

        /* Return write protect error.  */
        return(FX_WRITE_PROTECT);
    }

    /* Search the system for the supplied directory name.  */
    status =  _fx_directory_search(media_ptr, directory_name, &dir_entry, FX_NULL, FX_NULL);

    /* Determine if the search was successful.  */
    if (status != FX_SUCCESS)
    {

#ifdef FX_ENABLE_FAULT_TOLERANT
        FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif /* FX_ENABLE_FAULT_TOLERANT */

        /* Release media protection.  */
        FX_UNPROTECT

        /* Return the error code.  */
        return(status);
    }

    /* Check to make sure the found entry is a directory.  */
    if (!(dir_entry.fx_dir_entry_attributes & (UCHAR)(FX_DIRECTORY)))
    {

#ifdef FX_ENABLE_FAULT_TOLERANT
        FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif /* FX_ENABLE_FAULT_TOLERANT */

        /* Release media protection.  */
        FX_UNPROTECT

        /* Return the not a directory error code.  */
        return(FX_NOT_DIRECTORY);
    }

    /* Check if the entry is read only */
    if (dir_entry.fx_dir_entry_attributes & (UCHAR)(FX_READ_ONLY))
    {
#ifdef FX_ENABLE_FAULT_TOLERANT
        FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif /* FX_ENABLE_FAULT_TOLERANT */

        /* Release media protection.  */
        FX_UNPROTECT

        /* Return the not a directory error code.  */
        return(FX_WRITE_PROTECT);
    }

    /* Copy the directory entry to the search directory structure for
       looking at the specified sub-directory contents.  */
    search_directory =  dir_entry;

    /* Ensure that the search directory's last search cluster is cleared.  */
    search_directory.fx_dir_entry_last_search_cluster =  0;


    /* Calculate the directory size by counting the allocated
       clusters for it.  */
    i =        0;
    cluster =  search_directory.fx_dir_entry_cluster;
    while (cluster < media_ptr -> fx_media_fat_reserved)
    {

        /* Increment the cluster count.  */
        i++;

        /* Read the next FAT entry.  */
        status =  _fx_utility_FAT_entry_read(media_ptr, cluster, &next_cluster);

        /* Check the return status.  */
        if (status != FX_SUCCESS)
        {

#ifdef FX_ENABLE_FAULT_TOLERANT
            FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif /* FX_ENABLE_FAULT_TOLERANT */

            /* Release media protection.  */
            FX_UNPROTECT

            /* Return the bad status.  */
            return(status);
        }

        if ((cluster < FX_FAT_ENTRY_START) || (cluster == next_cluster) || (i > media_ptr -> fx_media_total_clusters))
        {
#ifdef FX_ENABLE_FAULT_TOLERANT
            FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif /* FX_ENABLE_FAULT_TOLERANT */

            /* Release media protection.  */
            FX_UNPROTECT

            /* Return the bad status.  */
            return(FX_FAT_READ_ERROR);
        }

        cluster = next_cluster;
    }

    /* Now we can calculate the directory size.  */
    directory_size =  (((ULONG)media_ptr -> fx_media_bytes_per_sector) *
                       ((ULONG)media_ptr -> fx_media_sectors_per_cluster) * i) /
                       (ULONG)FX_DIR_ENTRY_SIZE;

    /* Also save this in the directory entry so we don't have to
       calculate it later.  */
    search_directory.fx_dir_entry_file_size =  directory_size;

    /* Make sure the new name is not in the current directory.  */
    /* The first two entries are skipped because they are just part of the sub-directory.  */
    i = 2;

    do
    {

        /* Read an entry from the directory.  */
        status = _fx_directory_entry_read(media_ptr, &search_directory, &i, &search_entry);

        /* Check for error status.  */
        if (status != FX_SUCCESS)
        {

#ifdef FX_ENABLE_FAULT_TOLERANT
            FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif /* FX_ENABLE_FAULT_TOLERANT */

            /* Release media protection.  */
            FX_UNPROTECT

            /* Return error condition.  */
            return(status);
        }

        /* Determine if this is the last directory entry.  */
        if (search_entry.fx_dir_entry_name[0] == FX_DIR_ENTRY_DONE)
        {
            break;
        }


        /* Determine if this is an empty entry.  */
        if ((UCHAR)search_entry.fx_dir_entry_name[0] != (UCHAR)FX_DIR_ENTRY_FREE)
        {

#ifdef FX_ENABLE_FAULT_TOLERANT
            FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif /* FX_ENABLE_FAULT_TOLERANT */

            /* Release media protection.  */
            FX_UNPROTECT

            /* Return error status.  */
            return(FX_DIR_NOT_EMPTY);
        }

        i++;
    } while (i < directory_size);

    /* At this point, we are going to delete the empty directory.  */

#ifndef FX_MEDIA_DISABLE_SEARCH_CACHE

    /* Invalidate the directory search saved information.  */
    media_ptr -> fx_media_last_found_name[0] =  FX_NULL;
#endif

    /* Mark the sub-directory entry as available.  */
    dir_entry.fx_dir_entry_name[0] =  (CHAR)FX_DIR_ENTRY_FREE;
    dir_entry.fx_dir_entry_short_name[0] =  (CHAR)FX_DIR_ENTRY_FREE;

    /* Now write out the directory entry.  */
    status =  _fx_directory_entry_write(media_ptr, &dir_entry);

    /* Determine if the write was successful.  */
    if (status != FX_SUCCESS)
    {

#ifdef FX_ENABLE_FAULT_TOLERANT
        FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif /* FX_ENABLE_FAULT_TOLERANT */

        /* Release media protection.  */
        FX_UNPROTECT

        /* Return the error code.  */
        return(status);
    }


    /* Walk through the directory's clusters and release them.  */
    cluster =  search_directory.fx_dir_entry_cluster;

    while (cluster < media_ptr -> fx_media_fat_reserved)
    {

        /* Increment the cluster count.  */
        i++;


        /* Read the next FAT entry.  */
        status =  _fx_utility_FAT_entry_read(media_ptr, cluster, &next_cluster);

        /* Check the return status.  */
        if (status != FX_SUCCESS)
        {

#ifdef FX_ENABLE_FAULT_TOLERANT
            FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif /* FX_ENABLE_FAULT_TOLERANT */

            /* Release media protection.  */
            FX_UNPROTECT

            /* Return the bad status.  */
            return(status);
        }

        if ((cluster < FX_FAT_ENTRY_START) || (cluster == next_cluster) || (i > media_ptr -> fx_media_total_clusters))
        {

#ifdef FX_ENABLE_FAULT_TOLERANT
            FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif /* FX_ENABLE_FAULT_TOLERANT */

            /* Release media protection.  */
            FX_UNPROTECT

            /* Return the bad status.  */
            return(FX_FAT_READ_ERROR);
        }

        /* Release the current cluster.  */

        status =  _fx_utility_FAT_entry_write(media_ptr, cluster, FX_FREE_CLUSTER);

        /* Check the return status.  */
        if (status != FX_SUCCESS)
        {

#ifdef FX_ENABLE_FAULT_TOLERANT
            FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif /* FX_ENABLE_FAULT_TOLERANT */

            /* Release media protection.  */
            FX_UNPROTECT

            /* Return the bad status.  */
            return(status);
        }

        /* Increment the number of available clusters for the media.  */
        media_ptr -> fx_media_available_clusters++;

        /* Copy next cluster to current cluster.  */
        cluster =  next_cluster;
    }

#ifdef FX_FAULT_TOLERANT

    /* Flush the cached individual FAT entries */
    _fx_utility_FAT_flush(media_ptr);
#endif

    /* Flush the logical sector cache.  */
    status =  _fx_utility_logical_sector_flush(media_ptr, ((ULONG64) 1), (ULONG64)(media_ptr -> fx_media_sectors_per_FAT), FX_FALSE);

#ifdef FX_ENABLE_FAULT_TOLERANT
    /* Check for a bad status.  */
    if (status != FX_SUCCESS)
    {

        FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);

        /* Release media protection.  */
        FX_UNPROTECT

        /* Return the bad status.  */
        return(status);
    }

    /* End transaction. */
    status = _fx_fault_tolerant_transaction_end(media_ptr);
#endif /* FX_ENABLE_FAULT_TOLERANT */

    /* Release media protection.  */
    FX_UNPROTECT

    /* Directory delete is complete, return status.  */
    return(status);
}



Generated by: GCOVR (Version 4.1)

Line	Branch	Exec	Source
1			/***************************************************************************
2			* Copyright (c) 2024 Microsoft Corporation
3			*
4			* This program and the accompanying materials are made available under the
5			* terms of the MIT License which is available at
6			* https://opensource.org/licenses/MIT.
7			*
8			* SPDX-License-Identifier: MIT
9			**************************************************************************/
10
11
12			/**************************************************************************/
13			/**************************************************************************/
14			/** */
15			/** FileX Component */
16			/** */
17			/** Directory */
18			/** */
19			/**************************************************************************/
20			/**************************************************************************/
21
22			#define FX_SOURCE_CODE
23
24
25			/* Include necessary system files. */
26
27			#include "fx_api.h"
28			#include "fx_system.h"
29			#include "fx_directory.h"
30			#include "fx_file.h"
31			#include "fx_utility.h"
32			#ifdef FX_ENABLE_FAULT_TOLERANT
33			#include "fx_fault_tolerant.h"
34			#endif /* FX_ENABLE_FAULT_TOLERANT */
35
36
37			/**************************************************************************/
38			/* */
39			/* FUNCTION RELEASE */
40			/* */
41			/* _fx_directory_delete PORTABLE C */
42			/* 6.1 */
43			/* AUTHOR */
44			/* */
45			/* William E. Lamie, Microsoft Corporation */
46			/* */
47			/* DESCRIPTION */
48			/* */
49			/* This function first attempts to find the specified directory. */
50			/* If found, the directory is examined to make sure it is empty. If */
51			/* the directory is not empty, an error code is returned to the */
52			/* caller. Otherwise, the directory will be deleted and its clusters */
53			/* will be made available. */
54			/* */
55			/* INPUT */
56			/* */
57			/* media_ptr Media control block pointer */
58			/* directory_name Directory name to delete */
59			/* */
60			/* OUTPUT */
61			/* */
62			/* return status */
63			/* */
64			/* CALLS */
65			/* */
66			/* _fx_directory_entry_read Read a directory entry */
67			/* _fx_directory_entry_write Write the new directory entry */
68			/* _fx_directory_search Search for the file name in */
69			/* the directory structure */
70			/* _fx_utility_logical_sector_flush Flush the written log sector */
71			/* _fx_utility_FAT_entry_read Read FAT entries to calculate */
72			/* the sub-directory size */
73			/* _fx_utility_FAT_entry_write Write FAT entry */
74			/* _fx_utility_FAT_flush Flush FAT cache */
75			/* _fx_fault_tolerant_transaction_start Start fault tolerant */
76			/* transaction */
77			/* _fx_fault_tolerant_transaction_end End fault tolerant transaction*/
78			/* _fx_fault_tolerant_recover Recover FAT chain */
79			/* _fx_fault_tolerant_reset_log_file Reset the log file */
80			/* */
81			/* CALLED BY */
82			/* */
83			/* Application Code */
84			/* */
85			/* RELEASE HISTORY */
86			/* */
87			/* DATE NAME DESCRIPTION */
88			/* */
89			/* 05-19-2020 William E. Lamie Initial Version 6.0 */
90			/* 09-30-2020 William E. Lamie Modified comment(s), */
91			/* resulting in version 6.1 */
92			/* */
93			/**************************************************************************/
94		218	UINT _fx_directory_delete(FX_MEDIA media_ptr, CHAR directory_name)
95			{
96
97			UINT status;
98			ULONG cluster, next_cluster;
99			ULONG i, directory_size;
100			FX_DIR_ENTRY dir_entry;
101			FX_DIR_ENTRY search_directory;
102			FX_DIR_ENTRY search_entry;
103
104
105
106			#ifndef FX_MEDIA_STATISTICS_DISABLE
107
108			/* Increment the number of times this service has been called. */
109		218	media_ptr -> fx_media_directory_deletes++;
110			#endif
111
112			/* Setup pointer to media name buffer. */
113		218	dir_entry.fx_dir_entry_name = media_ptr -> fx_media_name_buffer + FX_MAX_LONG_NAME_LEN;
114
115			/* Setup search pointer to media name buffer. */
116		218	search_directory.fx_dir_entry_name = media_ptr -> fx_media_name_buffer + FX_MAX_LONG_NAME_LEN * 2;
117
118			/* Setup search entry pointer to media name buffer. */
119		218	search_entry.fx_dir_entry_name = media_ptr -> fx_media_name_buffer + FX_MAX_LONG_NAME_LEN * 3;
120
121			/* Clear the short name string of the three file names that will be worked with. */
122		218	dir_entry.fx_dir_entry_short_name[0] = 0;
123		218	search_directory.fx_dir_entry_short_name[0] = 0;
124		218	search_entry.fx_dir_entry_short_name[0] = 0;
125
126			/* Check the media to make sure it is open. */
127	✓✓	218	if (media_ptr -> fx_media_id != FX_MEDIA_ID)
128			{
129
130			/* Return the media not opened error. */
131		1	return(FX_MEDIA_NOT_OPEN);
132			}
133
134			/* If trace is enabled, insert this event into the trace buffer. */
135			FX_TRACE_IN_LINE_INSERT(FX_TRACE_DIRECTORY_DELETE, media_ptr, directory_name, 0, 0, FX_TRACE_DIRECTORY_EVENTS, 0, 0)
136
137			/* Protect against other threads accessing the media. */
138		217	FX_PROTECT
139
140			#ifdef FX_ENABLE_FAULT_TOLERANT
141			/* Start transaction. */
142			_fx_fault_tolerant_transaction_start(media_ptr);
143			#endif /* FX_ENABLE_FAULT_TOLERANT */
144
145			/* Check for write protect at the media level (set by driver). */
146	✓✓	217	if (media_ptr -> fx_media_driver_write_protect)
147			{
148
149			#ifdef FX_ENABLE_FAULT_TOLERANT
150			FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
151			#endif /* FX_ENABLE_FAULT_TOLERANT */
152
153			/* Release media protection. */
154		1	FX_UNPROTECT
155
156			/* Return write protect error. */
157		1	return(FX_WRITE_PROTECT);
158			}
159
160			/* Search the system for the supplied directory name. */
161		216	status = _fx_directory_search(media_ptr, directory_name, &dir_entry, FX_NULL, FX_NULL);
162
163			/* Determine if the search was successful. */
164	✓✓	216	if (status != FX_SUCCESS)
165			{
166
167			#ifdef FX_ENABLE_FAULT_TOLERANT
168			FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
169			#endif /* FX_ENABLE_FAULT_TOLERANT */
170
171			/* Release media protection. */
172		2	FX_UNPROTECT
173
174			/* Return the error code. */
175		2	return(status);
176			}
177
178			/* Check to make sure the found entry is a directory. */
179	✓✓	214	if (!(dir_entry.fx_dir_entry_attributes & (UCHAR)(FX_DIRECTORY)))
180			{
181
182			#ifdef FX_ENABLE_FAULT_TOLERANT
183			FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
184			#endif /* FX_ENABLE_FAULT_TOLERANT */
185
186			/* Release media protection. */
187		1	FX_UNPROTECT
188
189			/* Return the not a directory error code. */
190		1	return(FX_NOT_DIRECTORY);
191			}
192
193			/* Check if the entry is read only */
194	✓✓	213	if (dir_entry.fx_dir_entry_attributes & (UCHAR)(FX_READ_ONLY))
195			{
196			#ifdef FX_ENABLE_FAULT_TOLERANT
197			FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
198			#endif /* FX_ENABLE_FAULT_TOLERANT */
199
200			/* Release media protection. */
201		1	FX_UNPROTECT
202
203			/* Return the not a directory error code. */
204		1	return(FX_WRITE_PROTECT);
205			}
206
207			/* Copy the directory entry to the search directory structure for
208			looking at the specified sub-directory contents. */
209		212	search_directory = dir_entry;
210
211			/* Ensure that the search directory's last search cluster is cleared. */
212		212	search_directory.fx_dir_entry_last_search_cluster = 0;
213
214
215			/* Calculate the directory size by counting the allocated
216			clusters for it. */
217		212	i = 0;
218		212	cluster = search_directory.fx_dir_entry_cluster;
219	✓✓	460	while (cluster < media_ptr -> fx_media_fat_reserved)
220			{
221
222			/* Increment the cluster count. */
223		252	i++;
224
225			/* Read the next FAT entry. */
226		252	status = _fx_utility_FAT_entry_read(media_ptr, cluster, &next_cluster);
227
228			/* Check the return status. */
229	✓✓	252	if (status != FX_SUCCESS)
230			{
231
232			#ifdef FX_ENABLE_FAULT_TOLERANT
233			FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
234			#endif /* FX_ENABLE_FAULT_TOLERANT */
235
236			/* Release media protection. */
237		1	FX_UNPROTECT
238
239			/* Return the bad status. */
240		1	return(status);
241			}
242
243	✓✓✓✓ ✓✓	251	if ((cluster < FX_FAT_ENTRY_START) \|\| (cluster == next_cluster) \|\| (i > media_ptr -> fx_media_total_clusters))
244			{
245			#ifdef FX_ENABLE_FAULT_TOLERANT
246			FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
247			#endif /* FX_ENABLE_FAULT_TOLERANT */
248
249			/* Release media protection. */
250		3	FX_UNPROTECT
251
252			/* Return the bad status. */
253		3	return(FX_FAT_READ_ERROR);
254			}
255
256		248	cluster = next_cluster;
257			}
258
259			/* Now we can calculate the directory size. */
260		208	directory_size = (((ULONG)media_ptr -> fx_media_bytes_per_sector) *
261		208	((ULONG)media_ptr -> fx_media_sectors_per_cluster) * i) /
262			(ULONG)FX_DIR_ENTRY_SIZE;
263
264			/* Also save this in the directory entry so we don't have to
265			calculate it later. */
266		208	search_directory.fx_dir_entry_file_size = directory_size;
267
268			/* Make sure the new name is not in the current directory. */
269			/* The first two entries are skipped because they are just part of the sub-directory. */
270		208	i = 2;
271
272			do
273			{
274
275			/* Read an entry from the directory. */
276		408	status = _fx_directory_entry_read(media_ptr, &search_directory, &i, &search_entry);
277
278			/* Check for error status. */
279	✓✓	408	if (status != FX_SUCCESS)
280			{
281
282			#ifdef FX_ENABLE_FAULT_TOLERANT
283			FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
284			#endif /* FX_ENABLE_FAULT_TOLERANT */
285
286			/* Release media protection. */
287		1	FX_UNPROTECT
288
289			/* Return error condition. */
290		1	return(status);
291			}
292
293			/* Determine if this is the last directory entry. */
294	✓✓	407	if (search_entry.fx_dir_entry_name[0] == FX_DIR_ENTRY_DONE)
295			{
296		195	break;
297			}
298
299
300			/* Determine if this is an empty entry. */
301	✓✓	212	if ((UCHAR)search_entry.fx_dir_entry_name[0] != (UCHAR)FX_DIR_ENTRY_FREE)
302			{
303
304			#ifdef FX_ENABLE_FAULT_TOLERANT
305			FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
306			#endif /* FX_ENABLE_FAULT_TOLERANT */
307
308			/* Release media protection. */
309		1	FX_UNPROTECT
310
311			/* Return error status. */
312		1	return(FX_DIR_NOT_EMPTY);
313			}
314
315		211	i++;
316	✓✓	211	} while (i < directory_size);
317
318			/* At this point, we are going to delete the empty directory. */
319
320			#ifndef FX_MEDIA_DISABLE_SEARCH_CACHE
321
322			/* Invalidate the directory search saved information. */
323		206	media_ptr -> fx_media_last_found_name[0] = FX_NULL;
324			#endif
325
326			/* Mark the sub-directory entry as available. */
327		206	dir_entry.fx_dir_entry_name[0] = (CHAR)FX_DIR_ENTRY_FREE;
328		206	dir_entry.fx_dir_entry_short_name[0] = (CHAR)FX_DIR_ENTRY_FREE;
329
330			/* Now write out the directory entry. */
331		206	status = _fx_directory_entry_write(media_ptr, &dir_entry);
332
333			/* Determine if the write was successful. */
334	✓✓	206	if (status != FX_SUCCESS)
335			{
336
337			#ifdef FX_ENABLE_FAULT_TOLERANT
338			FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
339			#endif /* FX_ENABLE_FAULT_TOLERANT */
340
341			/* Release media protection. */
342		1	FX_UNPROTECT
343
344			/* Return the error code. */
345		1	return(status);
346			}
347
348
349			/* Walk through the directory's clusters and release them. */
350		205	cluster = search_directory.fx_dir_entry_cluster;
351
352	✓✓	444	while (cluster < media_ptr -> fx_media_fat_reserved)
353			{
354
355			/* Increment the cluster count. */
356		244	i++;
357
358
359			/* Read the next FAT entry. */
360		244	status = _fx_utility_FAT_entry_read(media_ptr, cluster, &next_cluster);
361
362			/* Check the return status. */
363	✓✓	244	if (status != FX_SUCCESS)
364			{
365
366			#ifdef FX_ENABLE_FAULT_TOLERANT
367			FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
368			#endif /* FX_ENABLE_FAULT_TOLERANT */
369
370			/* Release media protection. */
371		1	FX_UNPROTECT
372
373			/* Return the bad status. */
374		1	return(status);
375			}
376
377	✓✓✓✓ ✓✓	243	if ((cluster < FX_FAT_ENTRY_START) \|\| (cluster == next_cluster) \|\| (i > media_ptr -> fx_media_total_clusters))
378			{
379
380			#ifdef FX_ENABLE_FAULT_TOLERANT
381			FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
382			#endif /* FX_ENABLE_FAULT_TOLERANT */
383
384			/* Release media protection. */
385		3	FX_UNPROTECT
386
387			/* Return the bad status. */
388		3	return(FX_FAT_READ_ERROR);
389			}
390
391			/* Release the current cluster. */
392
393		240	status = _fx_utility_FAT_entry_write(media_ptr, cluster, FX_FREE_CLUSTER);
394
395			/* Check the return status. */
396	✓✓	240	if (status != FX_SUCCESS)
397			{
398
399			#ifdef FX_ENABLE_FAULT_TOLERANT
400			FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
401			#endif /* FX_ENABLE_FAULT_TOLERANT */
402
403			/* Release media protection. */
404		1	FX_UNPROTECT
405
406			/* Return the bad status. */
407		1	return(status);
408			}
409
410			/* Increment the number of available clusters for the media. */
411		239	media_ptr -> fx_media_available_clusters++;
412
413			/* Copy next cluster to current cluster. */
414		239	cluster = next_cluster;
415			}
416
417			#ifdef FX_FAULT_TOLERANT
418
419			/* Flush the cached individual FAT entries */
420			_fx_utility_FAT_flush(media_ptr);
421			#endif
422
423			/* Flush the logical sector cache. */
424		200	status = _fx_utility_logical_sector_flush(media_ptr, ((ULONG64) 1), (ULONG64)(media_ptr -> fx_media_sectors_per_FAT), FX_FALSE);
425
426			#ifdef FX_ENABLE_FAULT_TOLERANT
427			/* Check for a bad status. */
428			if (status != FX_SUCCESS)
429			{
430
431			FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
432
433			/* Release media protection. */
434			FX_UNPROTECT
435
436			/* Return the bad status. */
437			return(status);
438			}
439
440			/* End transaction. */
441			status = _fx_fault_tolerant_transaction_end(media_ptr);
442			#endif /* FX_ENABLE_FAULT_TOLERANT */
443
444			/* Release media protection. */
445		200	FX_UNPROTECT
446
447			/* Directory delete is complete, return status. */
448		200	return(status);
449			}
450