long used, avail, total, pct;
try {
FileSystemUsage usage;
if (fs instanceof NfsFileSystem) {
NfsFileSystem nfs = (NfsFileSystem)fs;
if (!nfs.ping()) {
println(nfs.getUnreachableMessage());
return;
}
}
usage = this.sigar.getFileSystemUsage(fs.getDirName());
if (this.opt_i) {