xdelta -V (return code: 2)
xdelta: version 1.1.3
xdelta --help (return code: 2)
xdelta: usage: xdelta COMMAND [OPTIONS] [ARG1 ...]
xdelta: COMMAND is one of:
xdelta: delta Produce a delta from ARG1 to ARG2 producing ARG3
xdelta: info List details about delta ARG1
xdelta: patch Apply patch ARG1 using file ARG2 producing ARG3
xdelta: OPTIONS are:
xdelta: -v, --version Print version information
xdelta: -V, --verbose Print verbose error messages
xdelta: -h, --help Print this summary
xdelta: -n, --noverify Disable automatic MD5 verification
xdelta: -p, --pristine Disable automatic GZIP decompression
xdelta: -m, --maxmem=SIZE Set the buffer size limit, e.g. 640K, 16M
xdelta: -[0-9] ZLIB compress level: 0=none, 1=fast, 6=default, 9=best
xdelta: -s=BLOCK_SIZE Sets block size (power of 2), minimum match length
xdelta: In-core memory requirement is (FROM_LEN * 8) / BLOCK_SIZE