/**
* Find free space on the Windows platform using the 'dir' command.
*
* @param path the path to get free space for, including the colon
* @param timeout The timeout amount in milliseconds or no timeout if the value is zero or less
* @return the amount of free drive space on the drive
* @throws IOException if an error occurs
*/
long freeSpaceWindows(String path, final long timeout) throws IOException {
path = FilenameUtils.normalize(path, false);
if (path.length() > 0 && path.charAt(0) != '"') {
path = "\"" + path + "\"";
}
// build and run the 'dir' command
final String[] cmdAttribs = new String[] {"cmd.exe", "/C", "dir /a /-c " + path};
// read in the output of the command to an ArrayList
final List<String> lines = performCommand(cmdAttribs, Integer.MAX_VALUE, timeout);
// now iterate over the lines we just read and find the LAST
// non-empty line (the free space bytes should be in the last element
// of the ArrayList anyway, but this will ensure it works even if it's
// not, still assuming it is on the last non-blank line)
for (int i = lines.size() - 1; i >= 0; i--) {
final String line = lines.get(i);
if (line.length() > 0) {
return parseDir(line, path);
}
}
// all lines are blank
throw new IOException(
"Command line 'dir /-c' did not return any info " + "for path '" + path + "'");
}
