Windows でディスク使用率等の一覧を表示する

df.cmd

@if(0)==(0) ECHO OFF
CScript //NoLogo //E:JScript "%~f0" %*
GOTO :EOF
@end

var COLUMN_INFOs = {
  k: {
    drive: { width:  5, align: "left" },
    type:  { width:  4, align: "left" },
    total: { width: 14, align: "right" },
    used:  { width: 14, align: "right" },
    free:  { width: 14, align: "right" },
    pct:   { width:  4, align: "right" },
    byteUnit: "K"
  },
  m: {
    drive: { width:  5, align: "left" },
    type:  { width:  4, align: "left" },
    total: { width: 14, align: "right" },
    used:  { width: 14, align: "right" },
    free:  { width: 14, align: "right" },
    pct:   { width:  4, align: "right" },
    byteUnit: "M"
  },
  g: {
    drive: { width:  5, align: "left" },
    type:  { width:  4, align: "left" },
    total: { width:  9, align: "right" },
    used:  { width:  9, align: "right" },
    free:  { width:  9, align: "right" },
    pct:   { width:  4, align: "right" },
    byteUnit: "G"
  },
  t: {
    drive: { width:  5, align: "left" },
    type:  { width:  4, align: "left" },
    total: { width:  9, align: "right" },
    used:  { width:  9, align: "right" },
    free:  { width:  9, align: "right" },
    pct:   { width:  4, align: "right" },
    byteUnit: "T"
  }
};

function main(args) {
  var unit = args(0) || "g";
  var columnInfo = COLUMN_INFOs[unit.toLowerCase()];
  if (!columnInfo) {
    WScript.Echo("argument must be 'k', 'm', 'g', 't' or empty.");
    WScript.Quit(1);
  }
  showDrives(columnInfo);
}
main(WScript.Arguments);

function showHeader(aCI) {
  //WScript.Echo("Drive Type   Total    Used    Free    % ValumeName");
  //WScript.Echo("----- ---- ------- ------- ------- ---- ----------");
  var unit = "(" + aCI.byteUnit + "B)";
  WScript.Echo([
    align("Drive", aCI.drive.width, aCI.drive.align),
    align("Type",  aCI.type.width,  aCI.type.align),
    align("Total" + unit, aCI.total.width, aCI.total.align),
    align("Used" + unit,  aCI.used.width,  aCI.used.align),
    align("Free" + unit,  aCI.free.width,  aCI.free.align),
    align("%",     aCI.pct.width,   aCI.pct.align),
    "ValumeName"
  ].join(" "));
  WScript.Echo([
    StringRepeat("-", aCI.drive.width),
    StringRepeat("-", aCI.type.width),
    StringRepeat("-", aCI.total.width),
    StringRepeat("-", aCI.used.width),
    StringRepeat("-", aCI.free.width),
    StringRepeat("-", aCI.pct.width),
    StringRepeat("-", 10)
  ].join(" "));
}

function showDrives(aColumnInfo) {
  var FSO = new ActiveXObject("Scripting.FileSystemObject");
  var e = new Enumerator(FSO.Drives);
  showHeader(aColumnInfo);
  for (; !e.atEnd(); e.moveNext()) {
    showDriveInfo(e.item(), aColumnInfo);
  }
}

// Drive Type Size Used Aviable Percent
// ----- ----
function showDriveInfo (aDrive, aCI) {
  var msg;
  if (aDrive.IsReady) {
    var usedSize = aDrive.TotalSize - aDrive.FreeSpace;
    msg = [
      align(aDrive.DriveLetter + ":",                  aCI.drive.width, aCI.drive.align),
      align(getDriveType(aDrive),                      aCI.type.width,  aCI.type.align),
      align(toByte(aDrive.TotalSize, aCI.byteUnit, 2), aCI.total.width, aCI.total.align),
      align(toByte(usedSize, aCI.byteUnit, 2),        aCI.used.width,  aCI.used.align),
      align(toByte(aDrive.FreeSpace, aCI.byteUnit, 2), aCI.free.width,  aCI.free.align),
      align((usedSize / aDrive.TotalSize * 100).toFixed(0)+"%", aCI.pct.width, aCI.pct.align),
      aDrive.VolumeName
    ].join(" ");
  } else {
    msg = [
      align(aDrive.DriveLetter + ":", aCI.drive.width, aCI.drive.align),
      align(getDriveType(aDrive),     aCI.type.width,  aCI.type.align),
      align("-",                      aCI.total.width, aCI.total.align),
      align("-",                      aCI.used.width,  aCI.used.align),
      align("-",                      aCI.free.width,  aCI.free.align),
      align("-",                      aCI.pct.width,   aCI.pct.align)
    ].join(" ");
  }
  WScript.Echo(msg);
}

function toByte (aNum, aByteType, aFixSize, aShowUnit) {
  var byteSize = 1;
  var postfix = aByteType.toUpperCase();
  switch (postfix) {
    case "K":
      byteSize = 1024;
      break;
    case "M": 
      byteSize = 1024 * 1024;
      break;
    case "G":
      byteSize = 1024 * 1024 * 1024;
      break;
    case "T":
      byteSize = 1024 * 1024 * 1024 * 1024;
      break;
    default:
      throw new TypeError("Unknown ByteType: " + aByteType);
  }
  return (aNum / byteSize).toFixed(aFixSize) + (aShowUnit ? postfix :"");
}

function align (aStr, aSize, aType) {
  var spaces = StringRepeat(" ", aSize);
  switch (aType) {
    case undefined:
    case 0:
    case "left":
      return (aStr + spaces).slice(0, aSize);
    case 1:
    case "right":
      return (spaces + aStr).slice(-aSize);
    default:
      throw new TypeError("Unknown AlignmentType");
  }
}

function getDriveType (aDrive) {
  switch (aDrive.DriveType) {
    case 1: // Removable
      return "RDD";
    case 2: // HardDisk
      return "HDD";
    case 3: // NetworkDirve
      return "Net";
    case 4: // CD
      return "CDD";
    case 5: // RAM Disk
      return "RAM";
    case 0:
    default: // Unknown
      return "???";
  }
}

function StringRepeat (aStr, aCount) {
  var result = "";
  for(;;) {
    if (aCount & 1) {
      result += aStr;
    }
    aCount >>= 1;
    if (aCount) {
      aStr += aStr;
    } else {
      break;
    }
  }
  return result;
}