public static long getFreeDiskSpaceOn()

in util/src/main/java/com/epam/deltix/util/io/BasicIOUtil.java [1285:1378]
77 lines of code
13 McCabe index (conditional complexity)

    public static long getFreeDiskSpaceOn(File filesys)
        throws IOException, InterruptedException {
        if (!filesys.exists())
            throw new FileNotFoundException(filesys.getPath());

        String fsep = System.getProperty("file.separator");
        String[] cmd = null;
        boolean dos = true;

        if (fsep.equals("\\"))
            cmd = new String[] { "cmd.exe", "/c", "dir", filesys.getPath()};
        else {
            cmd = new String[] { "/usr/bin/df", "-k", filesys.getPath()};
            dos = false;
        }

        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        try {
            int ret =
                ProcessHelper.execAndWait(
                    cmd,
                    null,
                    null,
                    false,
                    baos,
                    true,
                    null,
                    false);
        } catch (IOException e) {
            cmd = new String[] { "df", "-k", filesys.getPath()};
                int ret =
                    ProcessHelper.execAndWait(
                        cmd,
                        null,
                        null,
                        false,
                        baos,
                        true,
                        null,
                        false);

        if (ret != 0)
            throw new IOException(
                "Command\n" + getCmdAsString(cmd) + "\nexited with " + ret);
        }
        String s = new String(baos.toByteArray());

        if (System.getProperty("debug.diskspace") != null)
            System.out.println(
                "Output from\n" + getCmdAsString(cmd) + ":\n" + s);

        int pos = -1;
        long value = 0;

        if (dos) {
            pos = s.lastIndexOf(" bytes free");

            if (pos < 0)
                throw new IOException(
                    "Unrecognized output from\n"
                        + getCmdAsString(cmd)
                        + ":\n"
                        + s);
            long exp = 1;

            for (;;) {
                pos--;

                char ch = s.charAt(pos);

                if (ch == ' ')
                    break;

                if (ch == ',')
                    continue;

                value += exp * (ch - '0');
                exp *= 10;
            }

        } else {
            StringTokenizer st = new StringTokenizer(s);
            for (int i = 1; i < 11; i++) {
                st.nextToken();
                if (i == 10)
                    value = Long.parseLong(st.nextToken());
                value *= 1024; // df -k gives us in kilobytes
            }

        }

        return (value);
    }