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/*

 *  This is a native test to explore how the readdir() family works.

 *  Newlib supports the following readdir() family members:

 *

 *    closedir()   -

 *    readdir()    -

 *    scandir()    -

 *    opendir()    -

 *    rewinddir()  -

 *    telldir()    - BSD not in POSIX

 *    seekdir()    - BSD not in POSIX

 *

 *

 *  seekdir() takes an offset which is a byte offset.  The Linux

 *  implementation of this appears to seek to the ((off/DIRENT_SIZE) + 1)

 *  record where DIRENT_SIZE seems to be 12 bytes.

 *

 *

 *

 *  $Id: test.c,v 1.2 2001-09-27 12:02:25 chris Exp $

 */

#include <stdio.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

#include <dirent.h>

#include <string.h>

#include <assert.h>

#include <unistd.h>

#include <errno.h>

#include <rtems.h>

#include <rtems/libio.h>

extern rtems_filesystem_location_info_t rtems_filesystem_current;

DIR *directory;

DIR *directory2;

DIR *directory3;

DIR *directory_not;

#ifndef __P

#define __P(args)()

#endif

char *dnames[] = {

        "a",

        "b",

        "c",

        "d",

        "e",

        "f",

        "c/y",

        "c/z",

        "c/x",

        "c/y/a3333",

        "c/y/j123",

        "c/y/my_mount_point",

        "c/y/my_mount_point/my_dir",

        "c/z/my_mount_point",

        "END"

};

char *fnames[] = {

        "a",

        "b",

        "c",

        "d",

        "e",

        "f",

        "c/y",

        "c/z",

        "c/x",

        "c/y/a3333",

        "c/y/j123",

        "c/y/my_mount_point",

        "c/y/my_mount_point/my_dir",

        "c/y/my_mount_point/my_dir/d",

        "c/z/my_mount_point",

        "/c/z/my_mount_point/a/../../my_mount_point/a/g",

        "END"

};

#if defined(__rtems__)

int test_main(void)

#else

int main(

  int argc,

  char **argv

)

#endif

{

  int i;

  int fd;

  int status;

  struct stat statbuf;

  rtems_filesystem_mount_table_entry_t *mt_entry;

  static char mount_point_string[25] = { "/c/z/my_mount_point" };

  printf( "\n\n*** MOUNT/UNMOUNT TEST ***\n" );

  /*

   * Change directory to the root and create files under

   * the base file system.

   */

  printf( "\nchdir to the root directory\n" );

  status = chdir( "/" );

  printf( "chdir() status : %d\n\n", status );

  printf( "\nCreating a series of directories under /\n" );

  i=0;

  while ( strcmp(dnames[i], "END") != 0 )

  {

     status = mkdir( dnames[i], 0777 );

     printf("Creating : %25s  %d %d   ", dnames[i], status, errno );

     if ( status == 0 )

        printf(" Success\n");

     else

        printf(" Failure\n");

     i++;

  }

  /*

   * Create a Files with all rwx for others group and user.  Verify

   * the created file.

   */

  printf("create /b/my_file\n");

  fd = open ("/b/my_file", O_CREAT, S_IRWXU|S_IRWXG|S_IRWXO);

  assert( fd != 0 );

  close (fd);

  printf("Verify /b/my_file\n");

  fd = open("/b/my_file", S_IRWXU|S_IRWXG|S_IRWXO);

  assert( fd != 0 );

  close( fd );

  printf("create c/y/my_mount_point/my_dir/d\n");

  fd = open ("c/y/my_mount_point/my_dir/d", O_CREAT, S_IRWXU|S_IRWXG|S_IRWXO);

  assert( fd != 0 );

  close (fd);

  printf("Verify c/y/my_mount_point/my_dir/d\n");

  fd = open("c/y/my_mount_point/my_dir/d", S_IRWXU|S_IRWXG|S_IRWXO);

  assert( fd != 0 );

  close( fd );

  /*

   *  Mount an the IMFS file system on the base file system.

   */

  printf("Attempting to mount IMFS file system at /c/z/my_mount_point \n");

  status = mount(

     &mt_entry,

     &IMFS_ops,

     RTEMS_FILESYSTEM_READ_WRITE,

     NULL,

     mount_point_string );

  assert( status == 0 );

  if( mt_entry == NULL ){

     printf(" NULL mount table entry was returned\n");

  }

  else {

     printf("2nd file system successfully mounted at /c/z/my_mount_point \n");

  }

  /*

   * Change directory to the mount point and create a group of files under

   * the mounted file system.

   */

  printf( "\nchdir to /c/z/my_mount_point.\n" );

  status = chdir( "/c/z/my_mount_point" );

  printf( "chdir() status : %d\n\n", status );

  printf( "\nCreating a series of directories under /c/z/my_mount_point\n" );

  i=0;

  while ( strcmp(fnames[i], "END") != 0 )

  {

     status = mkdir( fnames[i], 0777 );

     printf("Creating: %46s   %d %d   ", fnames[i], status, errno );

     if ( status == 0 )

        printf(" Success\n");

     else {

        printf(" Failure\n");

        perror("errno");

     }

     status = stat( fnames[i], &statbuf );

     if ( status == -1 )

       printf( ": %s\n", strerror( errno ) );

     i++;

  }

  printf( "\nchdir to /\n" );

  status = chdir( "/" );

  printf( "chdir() status : %d\n\n", status );

  /*

   * Unmount the first file system we mounted

   */

  printf( "Unmount status:");

  status = unmount( "/c/z/my_mount_point" );

  printf( " %d\n", status );

  /*

   * Mount a NULL filesystem and verify it fails.

   */

  printf("Mount a NULL file system and verify EINVAL\n");

  status = mount(

   &mt_entry,

   NULL,

   RTEMS_FILESYSTEM_READ_WRITE,

   NULL,

   mount_point_string );

  assert( status == -1 );

  assert( errno == EINVAL );

  /*

   * Verify mount with option of -62 fails with EINVAL

   */

  printf("mount with option of -62 should fail with EINVAL\n");

  status = mount(

     &mt_entry,

     &IMFS_ops,

     -62,

     NULL,

     "/c/y/my_mount_point" );

  assert( status == -1 );

  assert( errno == EINVAL );

  /*

   * Mount a Read Only File system.

   */

  printf("Mount a Read Only filesystem at /c/y/my_mount_point \n");

  status = mount(

     &mt_entry,

     &IMFS_ops,

     RTEMS_FILESYSTEM_READ_ONLY,

     NULL,

     "/c/y/my_mount_point" );

  assert( status == 0 );

  if( mt_entry == NULL ){

     printf(" NULL mount table entry was returned\n");

  }

  else {

     printf("Read only file system successfully mounted at /c/y/my_mount_point \n");

  }

  /*

   * Create a directory that passes through the read only file system.

   */

  printf("create c/y/my_mount_point/../../y/my_mount_point/new_dir\n");

  status = mkdir("c/y/my_mount_point/../../y/my_mount_point/new_dir",S_IRWXU );

  assert( status == 0 );

  status = stat("c/y/my_mount_point/../../y/my_mount_point/new_dir",&statbuf );

  assert( status == 0 );

  status = stat("c/y/my_mount_point/new_dir/..", &statbuf );

  assert( status == 0 );

  /*

   * Attempt to mount a second file system at a used mount point.

   */

  printf("Verify a mount point retruns EBUSY for another mount\n");

  status = mount(

     &mt_entry,

     &IMFS_ops,

     RTEMS_FILESYSTEM_READ_ONLY,

     NULL,

     "/c/y/my_mount_point" );

  assert( status == -1 );

  assert( errno == EBUSY);

  /*

   * Attempt to mount at a file.

   */

  printf("Mount on a file should fail with ENOTDIR\n");

  status = mount(

     &mt_entry,

     &IMFS_ops,

     RTEMS_FILESYSTEM_READ_ONLY,

     NULL,

     "/b/my_file" );

  assert( status == -1 );

  assert( errno == ENOTDIR );

  /*

   * Verify we cannot unmount a file system while we are in it.

   */

  printf("Create and chdir to /c/y/my_mount_point/mydir\n");

  status = mkdir( "/c/y/my_mount_point/mydir", 0777);

  assert( status == 0 );

  status = chdir( "/c/y/my_mount_point/mydir" );

  assert( status == 0 );

  printf("unmount of /c/y/my_mount_point should fail with EBUSY\n");

  status = unmount( "/c/y/my_mount_point" );

  assert( status == -1 );

  assert( errno == EBUSY );

  /*

   * Chdir to root and verify we can unmount the file system now.

   */

  printf("chdir to / and verify we can unmount /c/y/my_mount_point\n");

  status = chdir( "/" );

  assert( status == 0 );

  printf("unmount /c/y/my_mount_point \n");

  status = unmount( "/c/y/my_mount_point" );

  assert( status == 0 );

  /*

   * Attempt to unmount a directory that does not exist.

   */

  printf("unmount /b/mount_point should fail with EINVAL\n");

  status = unmount( "/b/mount_point" );

  assert( status == -1 );

  assert( errno == ENOENT );

  /*

   * Remount the filesystem.

   */

  printf("Mount /c/y/my_mount_point\n");

  status = mount(

     &mt_entry,

     &IMFS_ops,

     RTEMS_FILESYSTEM_READ_ONLY,

     NULL,

     "/c/y/my_mount_point" );

  assert( status == 0 );

  /*

   * Create a file and directory then open the directory.

   * Verify unmount will return EBUSY while directory is open.

   */

  printf("Create and open /c/y/my_mount_point/my_file\n");

  fd = open( "/c/y/my_mount_point/my_file", O_CREAT, S_IRWXU|S_IRWXG|S_IRWXO);

  assert( fd != -1 );

  status = close( fd );

  assert( status == 0 );

  printf("\nmkdir /c/y/my_mount_point/my_dir\n");

  status = mkdir( "/c/y/my_mount_point/my_dir", 0x1c0 );

  printf("Open /c/y/my_mount_point/my_dir\n");

  directory = opendir( "/c/y/my_mount_point/my_dir" );

  assert( directory );

  printf("Unmount /c/y/my_mount_point should fail with EBUSY\n");

  status = unmount( "/c/y/my_mount_point" );

  assert( status == -1 );

  assert( errno == EBUSY );

  printf("Close /c/y/my_mount_point/my_dir\n");

  status = closedir( directory );

  assert( status == 0 );

  /*

   * Attempt to unmount a directory that is not a mount point.

   */

  printf("Unmount /c/y/my_mount_point/my_dir\n");

  status = unmount( "/c/y/my_mount_point/my_dir" );

  assert( status == -1 );

  assert( errno == EACCES );

  /*

   * Verify a file system can not be unmounted with a mounted file system

   * in it.

   */

  printf("Mount a file system at /c/y/my_mount_point/my_dir\n");

  status = mount(

     &mt_entry,

     &IMFS_ops,

     RTEMS_FILESYSTEM_READ_WRITE,

     NULL,

     "/c/y/my_mount_point/my_dir");

  assert( status == 0 );

  printf("unmount /c/y/my_mount_point should fail with EBUSY\n");

  status = unmount( "/c/y/my_mount_point" );

  assert( status == -1 );

  assert( errno == EBUSY );

  /*

   * Verify you cannot create a hard link across mounted file systems.

   */

  printf("Verify a hard link across filesystems fails with EXDEV\n");

  status = mkdir( "/c/y/my_mount_point/my_dir2", S_IRWXU  );

  assert( status == 0 );

  status = link( "/c/y/my_mount_point/my_dir2", "/c/y/my_mount_point/my_dir/my_link" );

  assert( status == -1 );

  assert( errno == EXDEV );

  /*

   * Create a symbolic link across mountpoints.

   */

  printf("Verify a symbolic link across file systems works\n");

  status = symlink( "/c/y/my_mount_point/my_dir2", "/c/y/my_mount_point/my_dir/my_link" );

  assert( status == 0 );

  status = stat( "/c/y/my_mount_point/my_dir/my_link", &statbuf );

  assert( status == 0 );

  printf("unmount /c/y/my_mount_point/my_dir\n");

  status = unmount( "/c/y/my_mount_point/my_dir" );

  assert( status == 0 );

  /*

   * Verify symblic link no longer works.

   */

  printf("Verify the symbolic link now fails\n");

  status = stat( "/c/y/my_mount_point/my_dir/my_link", &statbuf );

  assert( status != 0 );

  printf("unmount /c/y/my_mount_point\n");

  status = unmount( "/c/y/my_mount_point" );

  assert( status == 0 );

  printf( "\n\n*** END OF MOUNT/UNMOUNT TEST ***\n" );

  exit(0);

}