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There placed minimal application based on RTEMS, Real Time Embedded Military System.

Source rtems-shell.tar.xz

config.h

/*
 * $Id: confapp.h,v 1.1 2007/12/02 10:13:59 root Exp root $
 */
 
#ifndef _CONFIG_APP_H
#define _CONFIG_APP_H 1
 
#define APP_USE_RC	1
#define APP_USE_MONITOR	1
#define APP_USE_TARFS	1
#define APP_USE_ATA	0
#undef APP_USE_RAMDISK
#define APP_USE_LOGIN	1
 
#endif

confrt.h

/*
 * $Id: confrt.h,v 1.1 2007/12/02 10:13:59 root Exp root $
 */
 
#ifndef _CONFIG_RTEMS_H
#define _CONFIG_RTEMS_H 1
 
#include "config.h"
 
#include <rtems.h>
#include <bsp.h>
 
#ifdef APP_USE_MONITOR
#include <rtems/monitor.h>
#endif
 
#ifdef APP_USE_TARFS
#include <rtems/untar.h>
#endif
 
#include <rtems/mkrootfs.h>
 
#ifdef APP_USE_ATA
#define CONFIGURE_APPLICATION_NEEDS_ATA_DRIVER	1
#define CONFIGURE_APPLICATION_NEEDS_IDE_DRIVER	1
#define CONFIGURE_ATA_DRIVER_TASK_PRIORITY	9
#endif
 
#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER	1
#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER	1
#define CONFIGURE_APPLICATION_NEEDS_LIBBLOCK	1
 
#define CONFIGURE_EXECUTIVE_RAM_SIZE	(1024*1024)
 
#define CONFIGURE_FILESYSTEM_IMFS	1
#define CONFIGURE_FILESYSTEM_MSDOS	1
#define CONFIGURE_FILESYSTEM_RFS	1
#define CONFIGURE_FILESYSTEM_TFTPFS	1
 
#define CONFIGURE_INIT
#define CONFIGURE_INIT_TASK_ATTRIBUTES	(RTEMS_FLOATING_POINT | RTEMS_PREEMPT | RTEMS_NO_TIMESLICE | RTEMS_ASR | RTEMS_INTERRUPT_LEVEL(TASK_INTLEVEL))
#define CONFIGURE_INIT_TASK_PRIORITY	120
#define CONFIGURE_INIT_TASK_STACK_SIZE	(32*1024)
 
#define CONFIGURE_LIBIO_MAXIMUM_FILE_DESCRIPTORS	200
#define CONFIGURE_MAXIMUM_DRIVERS		10
#define CONFIGURE_MAXIMUM_MESSAGE_QUEUES	128
#define CONFIGURE_MAXIMUM_PARTITIONS		2
#define CONFIGURE_MAXIMUM_SEMAPHORES		512
#define CONFIGURE_MAXIMUM_TASKS			1024
#define CONFIGURE_MAXIMUM_TIMERS		5
#define CONFIGURE_MAXIMUM_USER_EXTENSIONS	1
#define CONFIGURE_MICROSECONDS_PER_TICK		10000
 
#define CONFIGURE_RTEMS_INIT_TASKS_TABLE
 
 
#define CONFIGURE_SHELL_COMMANDS_ALL	1
#define CONFIGURE_SHELL_COMMANDS_INIT	1
#define CONFIGURE_SHELL_MOUNT_MSDOS	1
#define CONFIGURE_SHELL_MOUNT_RFS	1
 
#define CONFIGURE_STACK_CHECKER_ENABLED		1
#define CONFIGURE_SWAPOUT_TASK_PRIORITY		10
#define CONFIGURE_USE_IMFS_AS_BASE_FILESYSTEM	1
 
#define TASK_INTLEVEL		0
 
rtems_task Init(rtems_task_argument argument);
 
#include <rtems/shellconfig.h>
#include <rtems/confdefs.h>
 
#endif

data.h

/*
 *  Extern declarations for C structure representing binary file data.tar
 *  WARNING: Automatically generated -- do not edit!
 */
 
#ifndef __data_h
#define __data_h
 
#include <sys/types.h>
 
extern const unsigned char data_tar[];
extern const size_t data_tar_size;
 
#endif

data.c

/*
 *  Declarations for C structure representing binary file data.tar
 *  WARNING: Automatically generated -- do not edit!
 */
 
#include <sys/types.h>
 
const unsigned char data_tar[] = {
  0x65, 0x74, 0x63, 0x2f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
  ...
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
};
 
const size_t data_tar_size = sizeof(data_tar);

ramdsk.h

/*
 * $Id: shell.h,v 1.1 2007/12/02 10:13:59 root Exp root $
 */
 
int ramdisk_init(void);

ramdsk.c

/*
 * $Id: shell.h,v 1.1 2007/12/02 10:13:59 root Exp root $
 */
 
#include <sys/stat.h>
#include <fcntl.h>
 
#include <rtems/ramdisk.h>
#include <rtems/blkdev.h>
#include <rtems/libio.h>
#include "config.h"
#include "ramdsk.h"
 
#ifdef APP_USE_RAMDISK
 
#define  RAMDISK_BLOCK_SIZE  (512)
#define  RAMDISK_BLOCK_COUNT (2048*2)
#define  RAMDISK_PATH "/dev/ramdisk"
 
dev_t dev = 0;
 
int ramdisk_init(void) {
  int st = 0;
  rtems_status_code sc;
 
  sc = rtems_disk_io_initialize();
  if (sc == RTEMS_SUCCESSFUL) {
     sc = ramdisk_register(RAMDISK_BLOCK_SIZE,
                           RAMDISK_BLOCK_COUNT,
                           false,
                           RAMDISK_PATH,
                           &dev);
     if (sc == RTEMS_SUCCESSFUL) {
        return(0);
     } else {
        return((int)sc);
     }
  } else {
     return((int)sc); 
  }
}
#endif

shell.h

/*
 * $Id: shell.h,v 1.1 2007/12/02 10:13:59 root Exp root $
 */
 
int shell_rc(void);
int shell_start(void);

shell.c

/*
 * $Id: shell.c,v 1.1 2007/12/02 10:13:59 root Exp root $
 */
#include "config.h"
 
#include <stdio.h>
#include <stdlib.h>
#include <bsp.h>
#include <fcntl.h>
#include <termios.h>
#include <errno.h>
 
#include <rtems/shell.h>
#include <rtems/bdbuf.h>
#include <rtems/error.h>
 
#include "shell.h"
 
#define SH_RC_STACK_SIZE	(40*1024)
#define SH_RC_PRIORITY	50
#define SH_RC_RUN_ONCE	0
#define SH_RC_WAIT	1
#define SH_RC_VERBOSE	0
 
#ifndef SH_RC_SCRIPT
#define SH_RC_SCRIPT	"/etc/rc"
#endif
 
int shell_rc (void){
#ifdef APP_USE_RC
  rtems_status_code sc;
  sc = rtems_shell_script("SHELL", 
    SH_RC_STACK_SIZE,
    SH_RC_PRIORITY,
    SH_RC_SCRIPT,
    "stdout",
    SH_RC_RUN_ONCE,
    SH_RC_WAIT,
    SH_RC_VERBOSE);
 
  if (sc != RTEMS_SUCCESSFUL) {
    printf ("Error running shell script: %s (%d)\n", rtems_status_text (sc), sc);
  }
#endif
  return(0);
}
 
#define SHELL_STACK_SIZE	(20*1024)
#define SHELL_PRIORITY	20
#define SHELL_RUN_ONCE	0
#define SHELL_WAIT	1
 
#ifdef APP_USE_LOGIN
#define SHELL_LOGIN_PTR	rtems_shell_login_check
#else
#define SHELL_LOGIN_PTR	NULL
#endif
 
int shell_start (void) {
   rtems_status_code sc;
   sc = rtems_shell_init("SHELL",
     SHELL_STACK_SIZE,
     SHELL_PRIORITY,
     "/dev/console",
     SHELL_RUN_ONCE,
     SHELL_WAIT,
     SHELL_LOGIN_PTR);
 
   if (sc != RTEMS_SUCCESSFUL) {
      printf ("Error starting shell: %s (%d)\n", rtems_status_text(sc), sc);
   }
   return(0);
}
/* EOF */

main.c

/*
 * $Id: init.c,v 1.1 2007/12/02 10:13:59 root Exp root $
 */
 
#include <stdio.h>
#include <stdlib.h>
#include <netinet/in.h>
 
#include <rtems/dosfs.h>
#include <ctype.h>
#include <rtems/bdpart.h>
#include <rtems/libcsupport.h>
#include <rtems/fsmount.h>
 
#include "config.h"
#include "shell.h"
#include "ramdsk.h"
#include "confrt.h"
#include "data.h"
 
rtems_task Init(rtems_task_argument ignored)
{
  int st;
  rtems_status_code sc;
  printf("\nBoot RTEMS kernel...\n\n");
 
#ifndef APP_USE_LOGIN
  printf("%s \n", _RTEMS_version);
  printf("%s \n\n", _Copyright_Notice);
#endif
  printf("Unpacking tar filesystem.\n");
  if(Untar_FromMemory((void *)data_tar, data_tar_size) != 0) {
    printf("Can't unpack tar filesystem\n");
    exit(1);
  }
 
#ifdef APP_USE_RAMDISK
  printf("Setup ramdisk...");
  if ((st = ramdisk_init()) == 0) {
    printf("Ok\n");
  } else {
    printf("Error\n");
  }
#endif
 
#ifdef APP_USE_RC
  printf("Execute local commands.\n");
  st = shell_rc();
#endif
 
  while (1) {
    printf("Start RTEMS shell.\n");
    st = shell_start();
  }
 
  printf("End the RTEMS init task.\n");
  sc = rtems_task_delete(RTEMS_SELF);
  printf( "Error: rtems_task_delete return status: %d.\n", st);
  exit(1);
}