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px4_autopilot/apps/examples/nxffs/nxffs_main.c

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/****************************************************************************
* examples/nxffs/nxffs_main.c
*
* Copyright (C) 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/mount.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <dirent.h>
#include <string.h>
#include <errno.h>
#include <crc32.h>
#include <debug.h>
#include <nuttx/mtd.h>
#include <nuttx/fs/nxffs.h>
/****************************************************************************
* Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* The default is to use the RAM MTD device at drivers/mtd/rammtd.c. But
* an architecture-specific MTD driver can be used instead by defining
* CONFIG_EXAMPLES_NXFFS_ARCHINIT. In this case, the initialization logic
* will call nxffs_archinitialize() to obtain the MTD driver instance.
*/
#ifndef CONFIG_EXAMPLES_NXFFS_ARCHINIT
/* This must exactly match the default configuration in drivers/mtd/rammtd.c */
# ifndef CONFIG_RAMMTD_BLOCKSIZE
# define CONFIG_RAMMTD_BLOCKSIZE 512
# endif
# ifndef CONFIG_RAMMTD_ERASESIZE
# define CONFIG_RAMMTD_ERASESIZE 4096
# endif
# ifndef CONFIG_EXAMPLES_NXFFS_NEBLOCKS
# define CONFIG_EXAMPLES_NXFFS_NEBLOCKS (32)
# endif
# undef CONFIG_EXAMPLES_NXFFS_BUFSIZE
# define CONFIG_EXAMPLES_NXFFS_BUFSIZE \
(CONFIG_RAMMTD_ERASESIZE * CONFIG_EXAMPLES_NXFFS_NEBLOCKS)
#endif
#ifndef CONFIG_EXAMPLES_NXFFS_MAXNAME
# define CONFIG_EXAMPLES_NXFFS_MAXNAME 128
#endif
#if CONFIG_EXAMPLES_NXFFS_MAXNAME > 255
# undef CONFIG_EXAMPLES_NXFFS_MAXNAME
# define CONFIG_EXAMPLES_NXFFS_MAXNAME 255
#endif
#ifndef CONFIG_EXAMPLES_NXFFS_MAXFILE
# define CONFIG_EXAMPLES_NXFFS_MAXFILE 8192
#endif
#ifndef CONFIG_EXAMPLES_NXFFS_MAXIO
# define CONFIG_EXAMPLES_NXFFS_MAXIO 347
#endif
#ifndef CONFIG_EXAMPLES_NXFFS_MAXOPEN
# define CONFIG_EXAMPLES_NXFFS_MAXOPEN 512
#endif
#ifndef CONFIG_EXAMPLES_NXFFS_MOUNTPT
# define CONFIG_EXAMPLES_NXFFS_MOUNTPT "/mnt/nxffs"
#endif
#ifndef CONFIG_EXAMPLES_NXFFS_NLOOPS
# define CONFIG_EXAMPLES_NXFFS_NLOOPS 100
#endif
#ifndef CONFIG_EXAMPLES_NXFFS_VERBOSE
# define CONFIG_EXAMPLES_NXFFS_VERBOSE 0
#endif
#if defined(CONFIG_DEBUG) && defined(CONFIG_DEBUG_FS)
# define message lib_rawprintf
# define msgflush()
#else
# define message printf
# define msgflush() fflush(stdout);
#endif
/****************************************************************************
* Private Types
****************************************************************************/
struct nxffs_filedesc_s
{
FAR char *name;
bool deleted;
size_t len;
uint32_t crc;
};
/****************************************************************************
* Private Data
****************************************************************************/
/* Pre-allocated simulated flash */
#ifndef CONFIG_EXAMPLES_NXFFS_ARCHINIT
static uint8_t g_simflash[CONFIG_EXAMPLES_NXFFS_BUFSIZE];
#endif
static uint8_t g_fileimage[CONFIG_EXAMPLES_NXFFS_MAXFILE];
static struct nxffs_filedesc_s g_files[CONFIG_EXAMPLES_NXFFS_MAXOPEN];
static const char g_mountdir[] = CONFIG_EXAMPLES_NXFFS_MOUNTPT "/";
static int g_nfiles;
static int g_ndeleted;
static struct mallinfo g_mmbefore;
static struct mallinfo g_mmprevious;
static struct mallinfo g_mmafter;
/****************************************************************************
* External Functions
****************************************************************************/
#ifdef CONFIG_EXAMPLES_NXFFS_ARCHINIT
extern FAR struct mtd_dev_s *nxffs_archinitialize(void);
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: nxffs_memusage
****************************************************************************/
static void nxffs_showmemusage(struct mallinfo *mmbefore,
struct mallinfo *mmafter)
{
message("VARIABLE BEFORE AFTER\n");
message("======== ======== ========\n");
message("arena %8x %8x\n", mmbefore->arena, mmafter->arena);
message("ordblks %8d %8d\n", mmbefore->ordblks, mmafter->ordblks);
message("mxordblk %8x %8x\n", mmbefore->mxordblk, mmafter->mxordblk);
message("uordblks %8x %8x\n", mmbefore->uordblks, mmafter->uordblks);
message("fordblks %8x %8x\n", mmbefore->fordblks, mmafter->fordblks);
}
/****************************************************************************
* Name: nxffs_loopmemusage
****************************************************************************/
static void nxffs_loopmemusage(void)
{
/* Get the current memory usage */
#ifdef CONFIG_CAN_PASS_STRUCTS
g_mmafter = mallinfo();
#else
(void)mallinfo(&g_mmafter);
#endif
/* Show the change from the previous loop */
message("\nEnd of loop memory usage:\n");
nxffs_showmemusage(&g_mmprevious, &g_mmafter);
/* Set up for the next test */
#ifdef CONFIG_CAN_PASS_STRUCTS
g_mmprevious = g_mmafter;
#else
memcpy(&g_mmprevious, &g_mmafter, sizeof(struct mallinfo));
#endif
}
/****************************************************************************
* Name: nxffs_endmemusage
****************************************************************************/
static void nxffs_endmemusage(void)
{
#ifdef CONFIG_CAN_PASS_STRUCTS
g_mmafter = mallinfo();
#else
(void)mallinfo(&g_mmafter);
#endif
message("\nFinal memory usage:\n");
nxffs_showmemusage(&g_mmbefore, &g_mmafter);
}
/****************************************************************************
* Name: nxffs_randchar
****************************************************************************/
static inline char nxffs_randchar(void)
{
int value = rand() % 63;
if (value == 0)
{
return '/';
}
else if (value <= 10)
{
return value + '0' - 1;
}
else if (value <= 36)
{
return value + 'a' - 11;
}
else /* if (value <= 62) */
{
return value + 'A' - 37;
}
}
/****************************************************************************
* Name: nxffs_randname
****************************************************************************/
static inline void nxffs_randname(FAR struct nxffs_filedesc_s *file)
{
int dirlen;
int maxname;
int namelen;
int alloclen;
int i;
dirlen = strlen(g_mountdir);
maxname = CONFIG_EXAMPLES_NXFFS_MAXNAME - dirlen;
namelen = (rand() % maxname) + 1;
alloclen = namelen + dirlen;
file->name = (FAR char*)malloc(alloclen + 1);
if (!file->name)
{
message("ERROR: Failed to allocate name, length=%d\n", namelen);
msgflush();
exit(5);
}
memcpy(file->name, g_mountdir, dirlen);
for (i = dirlen; i < alloclen; i++)
{
file->name[i] = nxffs_randchar();
}
file->name[alloclen] = '\0';
}
/****************************************************************************
* Name: nxffs_randfile
****************************************************************************/
static inline void nxffs_randfile(FAR struct nxffs_filedesc_s *file)
{
int i;
file->len = (rand() % CONFIG_EXAMPLES_NXFFS_MAXFILE) + 1;
for (i = 0; i < file->len; i++)
{
g_fileimage[i] = nxffs_randchar();
}
file->crc = crc32(g_fileimage, file->len);
}
/****************************************************************************
* Name: nxffs_freefile
****************************************************************************/
static void nxffs_freefile(FAR struct nxffs_filedesc_s *file)
{
if (file->name)
{
free(file->name);
}
memset(file, 0, sizeof(struct nxffs_filedesc_s));
}
/****************************************************************************
* Name: nxffs_wrfile
****************************************************************************/
static inline int nxffs_wrfile(FAR struct nxffs_filedesc_s *file)
{
size_t offset;
int fd;
int ret;
/* Create a random file */
nxffs_randname(file);
nxffs_randfile(file);
fd = open(file->name, O_WRONLY | O_CREAT | O_EXCL, 0666);
if (fd < 0)
{
/* If it failed because there is no space on the device, then don't
* complain.
*/
if (errno != ENOSPC)
{
message("ERROR: Failed to open file for writing: %d\n", errno);
message(" File name: %s\n", file->name);
message(" File size: %d\n", file->len);
}
nxffs_freefile(file);
return ERROR;
}
/* Write a random amount of data to the file */
for (offset = 0; offset < file->len; )
{
size_t maxio = (rand() % CONFIG_EXAMPLES_NXFFS_MAXIO) + 1;
size_t nbytestowrite = file->len - offset;
ssize_t nbyteswritten;
if (nbytestowrite > maxio)
{
nbytestowrite = maxio;
}
nbyteswritten = write(fd, &g_fileimage[offset], nbytestowrite);
if (nbyteswritten < 0)
{
int err = errno;
/* If the write failed because there is no space on the device,
* then don't complain.
*/
if (err != ENOSPC)
{
message("ERROR: Failed to write file: %d\n", err);
message(" File name: %s\n", file->name);
message(" File size: %d\n", file->len);
message(" Write offset: %d\n", offset);
message(" Write size: %d\n", nbytestowrite);
ret = ERROR;
}
close(fd);
/* Remove any garbage file that might have been left behind */
ret = unlink(file->name);
if (ret < 0)
{
message(" Failed to remove partial file\n");
}
else
{
#if CONFIG_EXAMPLES_NXFFS_VERBOSE != 0
message(" Successfully removed partial file\n");
#endif
}
nxffs_freefile(file);
return ERROR;
}
else if (nbyteswritten != nbytestowrite)
{
message("ERROR: Partial write:\n");
message(" File name: %s\n", file->name);
message(" File size: %d\n", file->len);
message(" Write offset: %d\n", offset);
message(" Write size: %d\n", nbytestowrite);
message(" Written: %d\n", nbyteswritten);
}
offset += nbyteswritten;
}
close(fd);
return OK;
}
/****************************************************************************
* Name: nxffs_fillfs
****************************************************************************/
static int nxffs_fillfs(void)
{
FAR struct nxffs_filedesc_s *file;
int ret;
int i;
/* Create a file for each unused file structure */
for (i = 0; i < CONFIG_EXAMPLES_NXFFS_MAXOPEN; i++)
{
file = &g_files[i];
if (file->name == NULL)
{
ret = nxffs_wrfile(file);
if (ret < 0)
{
#if CONFIG_EXAMPLES_NXFFS_VERBOSE != 0
message("ERROR: Failed to write file %d\n", i);
#endif
return ERROR;
}
#if CONFIG_EXAMPLES_NXFFS_VERBOSE != 0
message(" Created file %s\n", file->name);
#endif
g_nfiles++;
}
}
return OK;
}
/****************************************************************************
* Name: nxffs_rdblock
****************************************************************************/
static ssize_t nxffs_rdblock(int fd, FAR struct nxffs_filedesc_s *file,
size_t offset, size_t len)
{
size_t maxio = (rand() % CONFIG_EXAMPLES_NXFFS_MAXIO) + 1;
ssize_t nbytesread;
if (len > maxio)
{
len = maxio;
}
nbytesread = read(fd, &g_fileimage[offset], len);
if (nbytesread < 0)
{
message("ERROR: Failed to read file: %d\n", errno);
message(" File name: %s\n", file->name);
message(" File size: %d\n", file->len);
message(" Read offset: %d\n", offset);
message(" Read size: %d\n", len);
return ERROR;
}
else if (nbytesread == 0)
{
#if 0 /* No... we do this on purpose sometimes */
message("ERROR: Unexpected end-of-file:\n");
message(" File name: %s\n", file->name);
message(" File size: %d\n", file->len);
message(" Read offset: %d\n", offset);
message(" Read size: %d\n", len);
#endif
return ERROR;
}
else if (nbytesread != len)
{
message("ERROR: Partial read:\n");
message(" File name: %s\n", file->name);
message(" File size: %d\n", file->len);
message(" Read offset: %d\n", offset);
message(" Read size: %d\n", len);
message(" Bytes read: %d\n", nbytesread);
}
return nbytesread;
}
/****************************************************************************
* Name: nxffs_rdfile
****************************************************************************/
static inline int nxffs_rdfile(FAR struct nxffs_filedesc_s *file)
{
size_t ntotalread;
ssize_t nbytesread;
uint32_t crc;
int fd;
/* Open the file for reading */
fd = open(file->name, O_RDONLY);
if (fd < 0)
{
if (!file->deleted)
{
message("ERROR: Failed to open file for reading: %d\n", errno);
message(" File name: %s\n", file->name);
message(" File size: %d\n", file->len);
}
return ERROR;
}
/* Read all of the data info the fileimage buffer using random read sizes */
for (ntotalread = 0; ntotalread < file->len; )
{
nbytesread = nxffs_rdblock(fd, file, ntotalread, file->len - ntotalread);
if (nbytesread < 0)
{
close(fd);
return ERROR;
}
ntotalread += nbytesread;
}
/* Verify the file image CRC */
crc = crc32(g_fileimage, file->len);
if (crc != file->crc)
{
message("ERROR: Bad CRC: %d vs %d\n", crc, file->crc);
message(" File name: %s\n", file->name);
message(" File size: %d\n", file->len);
close(fd);
return ERROR;
}
/* Try reading past the end of the file */
nbytesread = nxffs_rdblock(fd, file, ntotalread, 1024) ;
if (nbytesread > 0)
{
message("ERROR: Read past the end of file\n");
message(" File name: %s\n", file->name);
message(" File size: %d\n", file->len);
message(" Bytes read: %d\n", nbytesread);
close(fd);
return ERROR;
}
close(fd);
return OK;
}
/****************************************************************************
* Name: nxffs_verifyfs
****************************************************************************/
static int nxffs_verifyfs(void)
{
FAR struct nxffs_filedesc_s *file;
int ret;
int i;
/* Create a file for each unused file structure */
for (i = 0; i < CONFIG_EXAMPLES_NXFFS_MAXOPEN; i++)
{
file = &g_files[i];
if (file->name != NULL)
{
ret = nxffs_rdfile(file);
if (ret < 0)
{
if (file->deleted)
{
#if CONFIG_EXAMPLES_NXFFS_VERBOSE != 0
message("Deleted file %d OK\n", i);
#endif
nxffs_freefile(file);
g_ndeleted--;
g_nfiles--;
}
else
{
message("ERROR: Failed to read a file: %d\n", i);
message(" File name: %s\n", file->name);
message(" File size: %d\n", file->len);
return ERROR;
}
}
else
{
if (file->deleted)
{
#if CONFIG_EXAMPLES_NXFFS_VERBOSE != 0
message("Succesffully read a deleted file\n");
message(" File name: %s\n", file->name);
message(" File size: %d\n", file->len);
#endif
nxffs_freefile(file);
g_ndeleted--;
g_nfiles--;
return ERROR;
}
else
{
#if CONFIG_EXAMPLES_NXFFS_VERBOSE != 0
message(" Verifed file %s\n", file->name);
#endif
}
}
}
}
return OK;
}
/****************************************************************************
* Name: nxffs_delfiles
****************************************************************************/
static int nxffs_delfiles(void)
{
FAR struct nxffs_filedesc_s *file;
int ndel;
int ret;
int i;
int j;
/* Are there any files to be deleted? */
int nfiles = g_nfiles - g_ndeleted;
if (nfiles < 1)
{
return 0;
}
/* Yes... How many files should we delete? */
ndel = (rand() % nfiles) + 1;
/* Now pick which files to delete */
for (i = 0; i < ndel; i++)
{
/* Guess a file index */
int ndx = (rand() % (g_nfiles - g_ndeleted));
/* And delete the next undeleted file after that random index */
for (j = ndx + 1; j != ndx;)
{
file = &g_files[j];
if (file->name && !file->deleted)
{
ret = unlink(file->name);
if (ret < 0)
{
message("ERROR: Unlink %d failed: %d\n", i+1, errno);
message(" File name: %s\n", file->name);
message(" File size: %d\n", file->len);
message(" File index: %d\n", j);
}
else
{
#if CONFIG_EXAMPLES_NXFFS_VERBOSE != 0
message(" Deleted file %s\n", file->name);
#endif
file->deleted = true;
g_ndeleted++;
break;
}
}
/* Increment the index and test for wrap-around */
if (++j >= CONFIG_EXAMPLES_NXFFS_MAXOPEN)
{
j = 0;
}
}
}
return OK;
}
/****************************************************************************
* Name: nxffs_delallfiles
****************************************************************************/
static int nxffs_delallfiles(void)
{
FAR struct nxffs_filedesc_s *file;
int ret;
int i;
for (i = 0; i < CONFIG_EXAMPLES_NXFFS_MAXOPEN; i++)
{
file = &g_files[i];
if (file->name)
{
ret = unlink(file->name);
if (ret < 0)
{
message("ERROR: Unlink %d failed: %d\n", i+1, errno);
message(" File name: %s\n", file->name);
message(" File size: %d\n", file->len);
message(" File index: %d\n", i);
}
else
{
#if CONFIG_EXAMPLES_NXFFS_VERBOSE != 0
message(" Deleted file %s\n", file->name);
#endif
nxffs_freefile(file);
}
}
}
g_nfiles = 0;
g_ndeleted = 0;
return OK;
}
/****************************************************************************
* Name: nxffs_directory
****************************************************************************/
static int nxffs_directory(void)
{
DIR *dirp;
FAR struct dirent *entryp;
int number;
/* Open the directory */
dirp = opendir(CONFIG_EXAMPLES_NXFFS_MOUNTPT);
if (!dirp)
{
/* Failed to open the directory */
message("ERROR: Failed to open directory '%s': %d\n",
CONFIG_EXAMPLES_NXFFS_MOUNTPT, errno);
return ERROR;
}
/* Read each directory entry */
message("Directory:\n");
number = 1;
do
{
entryp = readdir(dirp);
if (entryp)
{
message("%2d. Type[%d]: %s Name: %s\n",
number, entryp->d_type,
entryp->d_type == DTYPE_FILE ? "File " : "Error",
entryp->d_name);
}
number++;
}
while (entryp != NULL);
closedir(dirp);
return OK;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxffs_main
****************************************************************************/
int nxffs_main(int argc, char *argv[])
{
FAR struct mtd_dev_s *mtd;
unsigned int i;
int ret;
/* Seed the random number generated */
srand(0x93846);
/* Create and initialize a RAM MTD device instance */
#ifdef CONFIG_EXAMPLES_NXFFS_ARCHINIT
mtd = nxffs_archinitialize();
#else
mtd = rammtd_initialize(g_simflash, CONFIG_EXAMPLES_NXFFS_BUFSIZE);
#endif
if (!mtd)
{
message("ERROR: Failed to create RAM MTD instance\n");
msgflush();
exit(1);
}
/* Initialize to provide NXFFS on an MTD interface */
ret = nxffs_initialize(mtd);
if (ret < 0)
{
message("ERROR: NXFFS initialization failed: %d\n", -ret);
msgflush();
exit(2);
}
/* Mount the file system */
ret = mount(NULL, CONFIG_EXAMPLES_NXFFS_MOUNTPT, "nxffs", 0, NULL);
if (ret < 0)
{
message("ERROR: Failed to mount the NXFFS volume: %d\n", errno);
msgflush();
exit(3);
}
/* Set up memory monitoring */
#ifdef CONFIG_CAN_PASS_STRUCTS
g_mmbefore = mallinfo();
g_mmprevious = g_mmbefore;
#else
(void)mallinfo(&g_mmbefore);
memcpy(&g_mmprevious, &g_mmbefore, sizeof(struct mallinfo));
#endif
/* Loop a few times ... file the file system with some random, files,
* delete some files randomly, fill the file system with more random file,
* delete, etc. This beats the FLASH very hard!
*/
#if CONFIG_EXAMPLES_NXFFS_NLOOPS == 0
for (i = 0; ; i++)
#else
for (i = 1; i <= CONFIG_EXAMPLES_NXFFS_NLOOPS; i++)
#endif
{
/* Write a files to the NXFFS file system until either (1) all of the
* open file structures are utilized or until (2) NXFFS reports an error
* (hopefully that the file system is full)
*/
message("\n=== FILLING %d =============================\n", i);
ret = nxffs_fillfs();
message("Filled file system\n");
message(" Number of files: %d\n", g_nfiles);
message(" Number deleted: %d\n", g_ndeleted);
nxffs_dump(mtd, CONFIG_EXAMPLES_NXFFS_VERBOSE);
/* Directory listing */
nxffs_directory();
/* Verify all files written to FLASH */
ret = nxffs_verifyfs();
if (ret < 0)
{
message("ERROR: Failed to verify files\n");
message(" Number of files: %d\n", g_nfiles);
message(" Number deleted: %d\n", g_ndeleted);
}
else
{
#if CONFIG_EXAMPLES_NXFFS_VERBOSE != 0
message("Verified!\n");
message(" Number of files: %d\n", g_nfiles);
message(" Number deleted: %d\n", g_ndeleted);
#endif
}
/* Delete some files */
message("\n=== DELETING %d ============================\n", i);
ret = nxffs_delfiles();
if (ret < 0)
{
message("ERROR: Failed to delete files\n");
message(" Number of files: %d\n", g_nfiles);
message(" Number deleted: %d\n", g_ndeleted);
}
else
{
message("Deleted some files\n");
message(" Number of files: %d\n", g_nfiles);
message(" Number deleted: %d\n", g_ndeleted);
}
nxffs_dump(mtd, CONFIG_EXAMPLES_NXFFS_VERBOSE);
/* Directory listing */
nxffs_directory();
/* Verify all files written to FLASH */
ret = nxffs_verifyfs();
if (ret < 0)
{
message("ERROR: Failed to verify files\n");
message(" Number of files: %d\n", g_nfiles);
message(" Number deleted: %d\n", g_ndeleted);
}
else
{
#if CONFIG_EXAMPLES_NXFFS_VERBOSE != 0
message("Verified!\n");
message(" Number of files: %d\n", g_nfiles);
message(" Number deleted: %d\n", g_ndeleted);
#endif
}
/* Show memory usage */
nxffs_loopmemusage();
msgflush();
}
/* Delete all files then show memory usage again */
nxffs_delallfiles();
nxffs_endmemusage();
msgflush();
return 0;
}