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This code demonstrates how to create files larger than 4 GB with NSS APIs (NetWare). Use sample NSS09 to read the created file back and verify the information in it.

Sample Code

#include <stdio.h>
#include <stdlib.h>
#include <zPublics.h>

int main( int argc, char* argv[]) {
  Key_t  root_key;
  NINT   task_id;
  Key_t  file_key;
  char   data[ 1024];
  size_t i;
  STATUS ccode;
  if ( argc != 2) {
    printf( "Usage: %s <filename>\n", argv[ 0]);
    return EXIT_FAILURE;
  }
  if (( ccode = zRootKey( 0, &root_key)) != zOK) {
    printf( "zRootKey failed, ccode = %d\n", ccode);
    return EXIT_FAILURE;
  }
  if (( ccode = zBeginTask( root_key, 0, &task_id)) != zOK) {
    zClose( root_key);
    printf( "zBeginTask failed, ccode = %d\n", ccode);
    return EXIT_FAILURE;
  }
  if (( ccode = zCreate( root_key, task_id, zNILXID, zNSPACE_LONG|zMODE_UTF8, argv[ 1],
      zFILE_REGULAR, 0, 0, zRR_WRITE_ACCESS, &file_key)) != zOK) {
    zEndTask( root_key, task_id);
    zClose( root_key);
    printf( "zCreate failed, ccode = %d\n", ccode);
    return EXIT_FAILURE;
  }
  /* initialize the buffer */
  for ( i = 1; i < sizeof( data); ++i) {
    data[ i] = ( char) i;
  }
  /* write 5G */
  for ( i = 0; i < 5 * 1024 * 1024; ) {
    NINT bytes_written;
    if ( i % ( 1024 * 1024) == 0) {
      data[ 0] = ( char) ( i / ( 1024 * 1024));
    }
    if (( ccode = zWrite( file_key, zNILXID, i * ( unsigned __int64) sizeof( data), sizeof( data), data, &bytes_written)) != zOK) {
      zClose( file_key);
      zEndTask( root_key, task_id);
      zClose( root_key);
      printf( "zWrite failed, ccode = %d\n", ccode);
      return EXIT_FAILURE;
    }
    if ( bytes_written != sizeof( data)) {
      zClose( file_key);
      zEndTask( root_key, task_id);
      zClose( root_key);
      printf( "bytes_written != sizeof( data): %d %d\n", bytes_written, sizeof( data));
      return EXIT_FAILURE;
    }
    ++i;
    if ( i % 1024 == 0) {
      printf( "Written %uM\n", i / 1024);
    }
  }
  if (( ccode = zClose( file_key)) != zOK) {
    zEndTask( root_key, task_id);
    zClose( root_key);
    printf( "zClose failed, ccode = %d\n", ccode);
    return EXIT_FAILURE;
  }
  if (( ccode = zEndTask( root_key, task_id)) != zOK) {
    zClose( root_key);
    printf( "zEndTask failed, ccode = %d\n", ccode);
    return EXIT_FAILURE;
  }
  if (( ccode = zClose( root_key)) != zOK) {
    printf( "zClose failed, ccode = %d\n", ccode);
    return EXIT_FAILURE;
  }
  return EXIT_SUCCESS;
}

--Dmitry Mityugov

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