xzcmp, xzdiff, lzcmp, lzdiff - compare compressed files
xzcmp [cmp_options] file1 [file2]
xzdiff [diff_options] file1 [file2]
lzcmp [cmp_options] file1 [file2]
lzdiff [diff_options] file1 [file2]
xzcmp and xzdiff invoke cmp(1) or diff(1) on files
compressed with xz(1), lzma(1), gzip(1), bzip2(1),
lzop(1), or zstd(1). All options specified are passed directly
to cmp(1) or diff(1). If only one file is specified, then the
files compared are file1 (which must have a suffix of a supported
compression format) and file1 from which the compression format suffix
has been stripped. If two files are specified, then they are uncompressed if
necessary and fed to cmp(1) or diff(1). The exit status from
cmp(1) or diff(1) is preserved unless a decompression error
occurs; then exit status is 2.
The names lzcmp and lzdiff are provided for backward
compatibility with LZMA Utils.
Messages from the cmp(1) or diff(1) programs refer to temporary
filenames instead of those specified.