How to create a persistent File?
Joe OS
joe_os2001 at yahoo.com
Mon Jul 12 14:09:32 UTC 2004
Hi,
Does someone already created a persistent file using
rtems in a PC
hardware?
I need to store a report information of a little rtems
program but I
cant create a file in the floppy and in the HD
either...
Please, which are que requirements to create a
persistent file?
A sample source code would be appreciated...
Many thanks,
Alex
PS:Env: rtems for i386, i686 bsp, linux mandrake. I
start my programs
using a floppy with grub.
PS: It would be nice to create the file in the startup
disk, but in the
HD is accepted too.
PS: Begginer. I am trying the following program. It
works well but I
cant find the file...
#define CONFIGURE_INIT
#include <bsp.h> /* for device driver prototypes */
#include <libchip/ata.h> /* for ata driver prototype
*/
#include <libchip/ide_ctrl.h> /* for general ide
driver prototype */
#include <unistd.h>
#include <rtems/error.h>
#include <dosfs.h>
#include <ctype.h>
#include <rtems/ide_part_table.h>
#include <rtems/libcsupport.h>
#include <rtems/fsmount.h>
#include <rtems.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <semaphore.h>
#include <pthread.h>
#include <fcntl.h>
#include <time.h>
#include <rtems/posix/timer.h>
//#define CONFIGURE_MAXIMUM_DRIVERS 10
#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
#define CONFIGURE_USE_IMFS_AS_BASE_FILESYSTEM
#define CONFIGURE_HAS_OWN_DEVICE_DRIVER_TABLE
/*
* Table of FAT file systems that will be mounted
* with the "fsmount" function.
* See cpukit/libmisc/fsmount for definition of fields
*/
fstab_t fs_table[] = {
{
"/dev/hda1","/mnt/hda1",
&msdos_ops, RTEMS_FILESYSTEM_READ_WRITE,
FSMOUNT_MNT_OK | FSMOUNT_MNTPNT_CRTERR |
FSMOUNT_MNT_FAILED,
0
},
{
"/dev/hda2","/mnt/hda2",
&msdos_ops, RTEMS_FILESYSTEM_READ_WRITE,
FSMOUNT_MNT_OK | FSMOUNT_MNTPNT_CRTERR |
FSMOUNT_MNT_FAILED,
0
},
{
"/dev/hda3","/mnt/hda3",
&msdos_ops, RTEMS_FILESYSTEM_READ_WRITE,
FSMOUNT_MNT_OK | FSMOUNT_MNTPNT_CRTERR |
FSMOUNT_MNT_FAILED,
0
},
{
"/dev/hda4","/mnt/hda4",
&msdos_ops, RTEMS_FILESYSTEM_READ_WRITE,
FSMOUNT_MNT_OK | FSMOUNT_MNTPNT_CRTERR |
FSMOUNT_MNT_FAILED,
0
},
{
"/dev/hdc1","/mnt/hdc1",
&msdos_ops, RTEMS_FILESYSTEM_READ_WRITE,
FSMOUNT_MNT_OK | FSMOUNT_MNTPNT_CRTERR |
FSMOUNT_MNT_FAILED,
0
},
{
"/dev/hdc2","/mnt/hdc2",
&msdos_ops, RTEMS_FILESYSTEM_READ_WRITE,
FSMOUNT_MNT_OK | FSMOUNT_MNTPNT_CRTERR |
FSMOUNT_MNT_FAILED,
0
},
{
"/dev/hdc3","/mnt/hdc3",
&msdos_ops, RTEMS_FILESYSTEM_READ_WRITE,
FSMOUNT_MNT_OK | FSMOUNT_MNTPNT_CRTERR |
FSMOUNT_MNT_FAILED,
0
},
{
"/dev/hdc4","/mnt/hdc4",
&msdos_ops, RTEMS_FILESYSTEM_READ_WRITE,
FSMOUNT_MNT_OK | FSMOUNT_MNTPNT_CRTERR |
FSMOUNT_MNT_FAILED,
0
}
};
#define MIN(a,b) (((a) > (b)) ? (b) : (a))
#define USE_SHELL
#ifdef USE_SHELL
#include <rtems/shell.h>
void fileio_start_shell(void)
{
printf(" =========================\n");
printf(" starting shell\n");
printf(" =========================\n");
shell_init("SHLL",0,100,"/dev/console",
B9600 | CS8,
0);
rtems_task_suspend(RTEMS_SELF);
}
#endif /* USE_SHELL */
void fileio_print_free_heap(void)
{
printf("--- unused dynamic memory: %lu bytes ---\n",
(unsigned long) malloc_free_space());
}
/*
* convert a size string (like 34K or 12M) to actual
byte count
*/
boolean fileio_str2size(const char *str,unsigned32
*res_ptr)
{
boolean failed = FALSE;
unsigned long size;
char suffix = ' ';
if (1 > sscanf(str,"%lu%c",&size,&suffix)) {
failed = TRUE;
}
else if (toupper(suffix) == 'K') {
size *= 1024;
}
else if (toupper(suffix) == 'M') {
size *= 1024UL*1024UL;
}
else if (isalpha(suffix)) {
failed = TRUE;
}
if (!failed) {
*res_ptr = size;
}
return failed;
}
/*void fileio_part_table_initialize(void)
{
char devname[64];
rtems_status_code rc;
printf(" =========================\n");
printf(" Initialize partition table\n");
printf(" =========================\n");
fileio_print_free_heap();
printf(" Enter device to initialize ==>");
fgets(devname,sizeof(devname)-1,stdin);
while (devname[strlen(devname)-1] == '\n') {
devname[strlen(devname)-1] = '\0';
}
rc = rtems_ide_part_table_initialize(devname);
printf("result = %d\n",rc);
fileio_print_free_heap();
}*/
/*void fileio_fsmount(void)
{
rtems_status_code rc;
printf(" =========================\n");
printf(" Process fsmount table\n");
printf(" =========================\n");
fileio_print_free_heap();
rc = rtems_fsmount( fs_table,
sizeof(fs_table)/sizeof(fs_table[0]),
NULL);
printf("result = %d\n",rc);
fileio_print_free_heap();
}*/
void fileio_write_file(void)
{
char fname[1024];
char tmp_str[32];
unsigned32 file_size = 0;
unsigned32 buf_size = 0;
size_t curr_pos,bytes_to_copy;
int fd = -1;
ssize_t n;
rtems_interval start_tick,curr_tick,ticks_per_sec;
char *bufptr = NULL;
boolean failed = FALSE;
static const char write_test_string[] =
"The quick brown fox jumps over the lazy dog\n";
static const char write_block_string[] =
"\n----- end of write buffer ------\n";
printf(" =========================\n");
printf(" WRITE FILE ... \n");
printf(" =========================\n");
fileio_print_free_heap();
/*
* get number of ticks per second
*/
rtems_clock_get(RTEMS_CLOCK_GET_TICKS_PER_SECOND,
&ticks_per_sec);
/*
* get path to file to write
*/
if (!failed) {
printf("Enter path/filename ==>");
fgets(fname,sizeof(fname)-1,stdin);
while (fname[strlen(fname)-1] == '\n') {
fname[strlen(fname)-1] = '\0';
}
if (0 == strlen(fname)) {
printf("*** no filename entered, aborted\n");
failed = TRUE;
}
}
/*
* get total file size to write
*/
if (!failed) {
printf("use suffix K for Kbytes, M for Mbytes or no
suffix for
bytes:\n"
"Enter filesize to write ==>");
fgets(tmp_str,sizeof(tmp_str)-1,stdin);
failed = fileio_str2size(tmp_str,&file_size);
if (failed) {
printf("*** illegal file size, aborted\n");
}
}
/*
* get block size to write
*/
if (!failed) {
printf("use suffix K for Kbytes, M for Mbytes or no
suffix for
bytes:\n"
"Enter block size to use for write calls ==>");
fgets(tmp_str,sizeof(tmp_str)-1,stdin);
failed = fileio_str2size(tmp_str,&buf_size);
if (failed) {
printf("*** illegal block size, aborted\n");
}
}
/*
* allocate buffer
*/
if (!failed) {
printf("... allocating %lu bytes of buffer for write
data\n",
(unsigned long)buf_size);
bufptr = malloc(buf_size+1); /* extra space for
terminating NUL char */
if (bufptr == NULL) {
printf("*** malloc failed, aborted\n");
failed = TRUE;
}
}
/*
* fill buffer with test pattern
*/
if (!failed) {
printf("... filling buffer with write data\n");
curr_pos = 0;
/*
* fill buffer with test string
*/
while (curr_pos < buf_size) {
bytes_to_copy = MIN(buf_size-curr_pos,
sizeof(write_test_string)-1);
memcpy(bufptr+curr_pos,write_test_string,bytes_to_copy);
curr_pos += bytes_to_copy;
}
/*
* put "end" mark at end of buffer
*/
bytes_to_copy = sizeof(write_block_string)-1;
if (buf_size >= bytes_to_copy) {
memcpy(bufptr+buf_size-bytes_to_copy,
write_block_string,
bytes_to_copy);
}
}
/*
* create file
*/
if (!failed) {
printf("... creating file \"%s\"\n",fname);
fd = open(fname,O_WRONLY | O_CREAT |
O_TRUNC,S_IREAD|S_IWRITE);
if (fd < 0) {
printf("*** file create failed, errno =
%d(%s)\n",errno,strerror(errno));
failed = TRUE;
}
}
/*
* write file
*/
if (!failed) {
printf("... writing to file\n");
rtems_clock_get (RTEMS_CLOCK_GET_TICKS_SINCE_BOOT,
&start_tick);
curr_pos = 0;
do {
bytes_to_copy = buf_size;
do {
n = write(fd,
bufptr + (buf_size-bytes_to_copy),
MIN(bytes_to_copy,file_size-curr_pos));
if (n > 0) {
bytes_to_copy -= n;
curr_pos += n;
}
} while ((bytes_to_copy > 0) && (n > 0));
} while ((file_size > curr_pos) && (n > 0));
rtems_clock_get (RTEMS_CLOCK_GET_TICKS_SINCE_BOOT,
&curr_tick);
if (n < 0) {
failed = TRUE;
printf("*** file write failed, "
"%lu bytes written, "
"errno = %d(%s)\n",
(unsigned long)curr_pos,errno,strerror(errno));
}
else {
printf("time elapsed for write: %g seconds\n",
((double)curr_tick-start_tick)/ticks_per_sec);
printf("write data rate: %g KBytes/second\n",
(((double)file_size) / 1024.0 /
(((double)curr_tick-start_tick)/ticks_per_sec)));
}
}
if (fd >= 0) {
printf("... closing file\n");
close(fd);
}
if (bufptr != NULL) {
printf("... deallocating buffer\n");
free(bufptr);
bufptr = NULL;
}
printf("\n ******** End of file write\n");
fileio_print_free_heap();
}
void fileio_read_file(void)
{
char fname[1024];
char tmp_str[32];
unsigned32 buf_size = 0;
size_t curr_pos;
int fd = -1;
ssize_t n;
rtems_interval start_tick,curr_tick,ticks_per_sec;
char *bufptr = NULL;
boolean failed = FALSE;
printf(" =========================\n");
printf(" READ FILE ... \n");
printf(" =========================\n");
fileio_print_free_heap();
/*
* get number of ticks per second
*/
rtems_clock_get(RTEMS_CLOCK_GET_TICKS_PER_SECOND,
&ticks_per_sec);
/*
* get path to file to read
*/
if (!failed) {
printf("Enter path/filename ==>");
fgets(fname,sizeof(fname)-1,stdin);
while (fname[strlen(fname)-1] == '\n') {
fname[strlen(fname)-1] = '\0';
}
if (0 == strlen(fname)) {
printf("*** no filename entered, aborted\n");
failed = TRUE;
}
}
/*
* get block size to read
*/
if (!failed) {
printf("use suffix K for Kbytes, M for Mbytes or no
suffix for
bytes:\n"
"Enter block size to use for read calls ==>");
fgets(tmp_str,sizeof(tmp_str)-1,stdin);
failed = fileio_str2size(tmp_str,&buf_size);
if (failed) {
printf("*** illegal block size, aborted\n");
}
}
/*
* allocate buffer
*/
if (!failed) {
printf("... allocating %lu bytes of buffer for write
data\n",
(unsigned long)buf_size);
bufptr = malloc(buf_size+1); /* extra space for
terminating NUL char */
if (bufptr == NULL) {
printf("*** malloc failed, aborted\n");
failed = TRUE;
}
}
/*
* open file
*/
if (!failed) {
printf("... opening file \"%s\"\n",fname);
fd = open(fname,O_RDONLY);
if (fd < 0) {
printf("*** file open failed, errno =
%d(%s)\n",errno,strerror(errno));
failed = TRUE;
}
}
/*
* read file
*/
if (!failed) {
printf("... reading from file\n");
rtems_clock_get (RTEMS_CLOCK_GET_TICKS_SINCE_BOOT,
&start_tick);
curr_pos = 0;
do {
n = read(fd,
bufptr,
buf_size);
if (n > 0) {
curr_pos += n;
}
} while (n > 0);
rtems_clock_get (RTEMS_CLOCK_GET_TICKS_SINCE_BOOT,
&curr_tick);
if (n < 0) {
failed = TRUE;
printf("*** file read failed, "
"%lu bytes read, "
"errno = %d(%s)\n",
(unsigned long)curr_pos,errno,strerror(errno));
}
else {
printf("%lu bytes read\n",
(unsigned long)curr_pos);
printf("time elapsed for read: %g seconds\n",
((double)curr_tick-start_tick)/ticks_per_sec);
printf("read data rate: %g KBytes/second\n",
(((double)curr_pos) / 1024.0 /
(((double)curr_tick-start_tick)/ticks_per_sec)));
}
}
if (fd >= 0) {
printf("... closing file\n");
close(fd);
}
if (bufptr != NULL) {
printf("... deallocating buffer\n");
free(bufptr);
bufptr = NULL;
}
printf("\n ******** End of file read\n");
fileio_print_free_heap();
}
void fileio_list_file(void)
{
char fname[1024];
char *buf_ptr = NULL;
unsigned32 flen = 0;
int fd = -1;
ssize_t n;
size_t buf_size = 100;
rtems_interval start_tick,curr_tick,ticks_per_sec;
printf(" =========================\n");
printf(" LIST FILE ... \n");
printf(" =========================\n");
fileio_print_free_heap();
printf(" Enter filename to list ==>");
fgets(fname,sizeof(fname)-1,stdin);
while (fname[strlen(fname)-1] == '\n') {
fname[strlen(fname)-1] = '\0';
}
/*
* allocate buffer of given size
*/
if (buf_size > 0) {
buf_ptr = malloc(buf_size);
}
if (buf_ptr != NULL) {
printf("\n Trying to open file \"%s\" for
read\n",fname);
fd = open(fname,O_RDONLY);
if (fd < 0) {
printf("*** file open failed, errno =
%d(%s)\n",errno,strerror(errno));
}
}
if (fd >= 0) {
rtems_clock_get (RTEMS_CLOCK_GET_TICKS_SINCE_BOOT,
&start_tick);
do {
n = read(fd,buf_ptr,buf_size);
if (n > 0) {
write(1,buf_ptr,n);
flen += n;
}
} while (n > 0);
rtems_clock_get (RTEMS_CLOCK_GET_TICKS_SINCE_BOOT,
&curr_tick);
printf("\n ******** End of file reached, flen =
%d\n",flen);
close(fd);
rtems_clock_get(RTEMS_CLOCK_GET_TICKS_PER_SECOND,
&ticks_per_sec);
printf("time elapsed for read: %g seconds\n",
((double)curr_tick-start_tick)/ticks_per_sec);
}
/*
* free buffer
*/
if (buf_ptr != NULL) {
free(buf_ptr);
}
fileio_print_free_heap();
}
void fileio_menu (void)
{
char inbuf[10];
for (;;)
{
printf(" =========================\n");
printf(" RTEMS FILE I/O Test Menu \n");
printf(" =========================\n");
printf(" p -> part_table_initialize\n");
printf(" f -> mount all disks in fs_table\n");
printf(" l -> list file\n");
printf(" r -> read file\n");
printf(" w -> write file\n");
#ifdef USE_SHELL
printf(" s -> start shell\n");
#endif
printf(" Enter your selection ==>");
inbuf[0] = '\0';
fgets(inbuf,sizeof(inbuf),stdin);
switch (inbuf[0]) {
case 'l':
fileio_list_file ();
break;
case 'r':
fileio_read_file ();
break;
case 'w':
fileio_write_file ();
break;
case 'p':
//fileio_part_table_initialize ();
break;
case 'f':
//fileio_fsmount ();
break;
#ifdef USE_SHELL
case 's':
fileio_start_shell ();
break;
#endif
default:
printf("Selection `%c` not implemented\n",inbuf[0]);
break;
}
}
exit (0);
}
void POSIX_Init(void* args)
{
puts( "\n\n*** FILE I/O SAMPLE AND TEST ***" );
fileio_menu();
}
//configuration information
//#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
//#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
//#define CONFIGURE_USE_IMFS_AS_BASE_FILESYSTEM
//#define CONFIGURE_HAS_OWN_DEVICE_DRIVER_TABLE
//POSIX CONFIGURATION
#define CONFIGURE_POSIX_INIT_THREAD_TABLE
#define CONFIGURE_MAXIMUM_POSIX_THREADS 10
#define CONFIGURE_MAXIMUM_POSIX_MUTEXES 5
#define CONFIGURE_MAXIMUM_POSIX_CONDITION_VARIABLES 5
#define CONFIGURE_MAXIMUM_POSIX_KEYS 5
#define CONFIGURE_MAXIMUM_POSIX_TIMERS 5
#define CONFIGURE_MAXIMUM_POSIX_QUEUED_SIGNALS 2000
#define CONFIGURE_MAXIMUM_POSIX_MESSAGE_QUEUES 5
#define CONFIGURE_MAXIMUM_POSIX_SEMAPHORES 10
#define CONFIGURE_LIBIO_MAXIMUM_FILE_DESCRIPTORS 10
#ifdef CONFIGURE_INIT
rtems_driver_address_table Device_drivers[] =
{
CONSOLE_DRIVER_TABLE_ENTRY
,CLOCK_DRIVER_TABLE_ENTRY
#ifdef RTEMS_BSP_HAS_IDE_DRIVER
,IDE_CONTROLLER_DRIVER_TABLE_ENTRY
/* important: ATA driver must be after ide drivers */
,ATA_DRIVER_TABLE_ENTRY
#endif
};
#include <rtems/bdbuf.h>
rtems_bdbuf_config rtems_bdbuf_configuration[] = {
{512,128,NULL}
};
int rtems_bdbuf_configuration_size =(
sizeof(rtems_bdbuf_configuration)
/sizeof(rtems_bdbuf_configuration[0]));
#endif
#include <confdefs.h>
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