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This sample demonstrates how to read various volume characteristics, including its type (NSS/TFS) and compression status (enabled/disabled) via NCP calls.

Sample Code

#include <errno.h>
#include <nit/nwdir.h>
#include <nwconn.h>
#include <nwerrno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main( int argc, char* argv[]) {
  int volumeNumber;
#include <npackon.h> /* don't move this directive to a different location */
  struct GetVolumeInformationLevel1RequestPacket {
    unsigned short SubFuncStrucLen;
    unsigned char  SubFuncCode;
    unsigned long  VolumeNumber;
    unsigned long  InfoLevelNumber;
  } req;
  struct GetVolumeInformationLevel1ReplyPacket {
    unsigned long  CurrentServerTime;
    unsigned char  VConsoleVersion;
    unsigned char  VConsoleRevision;
    unsigned short reserved;
    unsigned long  InfoLevel;
    /* VolInfoDef: */
    unsigned long  VolumeType;
    unsigned long  StatusFlagBits;
    unsigned long  SectorSize;
    unsigned long  SectorsPerCluster;
    unsigned long  VolumeSizeInClusters;
    unsigned long  FreedClusters;
    unsigned long  SubAllocFreeableClusters;
    unsigned long  FreeableLimboSectors;
    unsigned long  NonFreeableLimboSectors;
    unsigned long  NonFreeableAvailableSubAllocSectors;
    unsigned long  NonUsableSubAllocSectors;
    unsigned long  SubAllocClusters;
    unsigned long  DataStreamsCount;
    unsigned long  LimboDataStreamsCount;
    unsigned long  OldestDeletedFileAgeInTicks;
    unsigned long  CompressedDataStreamsCount;
    unsigned long  CompressedLimboDataStreamsCount;
    unsigned long  UnCompressedDataStreamsCount;
    unsigned long  PreCompressedSectors;
    unsigned long  CompressedSectors;
    unsigned long  MigratedFiles;
    unsigned long  MigratedSectors;
    unsigned long  ClustersUsedByFAT;
    unsigned long  ClustersUsedByDirectories;
    unsigned long  ClustersUsedByExtendedDirectories;
    unsigned long  TotalDirectoryEntries;
    unsigned long  UnusedDirectoryEntries;
    unsigned long  TotalExtendedDirectoryExtants;
    unsigned long  UnUsedExtendedDirectoryExtants;
    unsigned long  ExtendedAttributesDefined;
    unsigned long  ExtendedAttributeExtantsUsed;
    unsigned long  DirectoryServicesObjectID;
    unsigned long  VolumeLastModifiedDateAndTime;
  } rep;
#include <npackoff.h> /* don't move this directive to a different location */
  int ccode;
  if ( argc != 2) {
    printf( "Usage: %s <vol_name>\n", argv[ 0]);
    return EXIT_FAILURE;
  }
  if ( GetVolumeNumber( argv[ 1], &volumeNumber) != 0) {
    printf( "GetVolumeNumber failed, errno = %d (%s), NetWareErrno = %d\n", errno, strerror( errno), NetWareErrno);
    return EXIT_FAILURE;
  }
  printf( "volumeNumber = %d\n", volumeNumber);
  req.SubFuncStrucLen = 0x900; /* Hi-Lo */
  req.SubFuncCode     = 34;
  req.VolumeNumber    = ( LONG) volumeNumber;
  req.InfoLevelNumber = 1;
  ccode = NWNCPSend( 123, &req, sizeof( req), &rep, sizeof( rep));
  if ( ccode != ESUCCESS) {
    printf( "NWNCPSend failed, ccode = %d\n", ccode);
    return EXIT_FAILURE;
  }
  puts( rep.StatusFlagBits & 2          ? "compression enabled" : "compression not enabled");
  puts( rep.StatusFlagBits & 0x80000000 ? "NSS"                 : "traditional");
  return EXIT_SUCCESS;
}

--Dmitry Mityugov

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