How to create a persistent File?
Till Straumann
strauman at slac.stanford.edu
Mon Jul 12 21:14:14 UTC 2004
Joe OS wrote:
> 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?
One method is using a network file system such as TFTPFS
or NFS. (Note that in order for writing a TFTPFS file,
it must already exist on the server and be world writable).
e.g.
FILE *f;
f = fopen("/TFTP/1.2.3.4/thepath/thefile","w");
fprintf(f,"hello\n');
fclose(f);
or
nfsMount("nfsserver","/exported/path","/mnt");
f = fopen("/mnt/thefile","w");
fprintf(f,"hello\n");
fclose(f);
HTH
-- Till
>
> 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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