mkzftree - Create a zisofs/RockRidge compressed file tree
mkzftree [OPTIONS]... INPUT OUTPUT
Takes an input file tree (INPUT) and create a corresponding
compressed file tree (OUTPUT) that can be used with an appropriately
patched mkisofs(8) to create a transparent-compression ISO 9660/Rock
Ridge filesystem using the "ZF" compression records.
- -f, --force
- Always compress all files, even if they get larger when compressed.
- -z level,
--level level
- Select compression level (1-9, default is 9). Lower compression levels are
faster, but typically result in larger output.
- -u,
--uncompress
- Uncompress an already compressed tree. This can be used to read a
compressed filesystem on a system which cannot read them natively.
- -p parallelism,
--parallelism parallelism
- Compress in parallel. The parallelism value indicates how many
compression threads are allowed to run.
- -x,
--one-filesystem
- Do not cross filesystem boundaries, but create directory stubs at mount
points.
- -X,
--strict-one-filesystem
- Do not cross filesystem boundaries, and do not create directory stubs at
mount points.
- -C path,
--crib-path path
- Steal ("crib") files from another directory if it looks (based
on name, size, type and modification time) like they match entries in the
new filesystem. The "crib tree" is usually the compressed
version of an older version of the same workload; this thus allows for
"incremental rebuilds" of a compressed filesystem tree. The
files are hardlinked from the crib tree to the output tree, so if it is
desirable to keep the link count correct the crib path should be deleted
before running mkisofs. The crib tree must be on the same
filesystem as the output tree.
- -l, --local
- Do not recurse into subdirectories, but create the directories
themselves.
- -L,
--strict-local
- Do not recurse into subdirectories, and do not create directories.
- -F, --file
- Indicates that INPUT may not necessarily be a directory; this
allows operation on a single file. Note especially that if -F is
specified, and INPUT is a symlink, the symlink itself will be
copied rather than whatever it happens to point to.
- -s, --sloppy
- Treat file modes, times and ownership data as less than precious
information and don't abort if they cannot be set. This may be useful if
running mkisofs on an input tree you do not own.
- -v, --verbose
- Increase the program verbosity.
- -V value,
--verbosity value
- Set the program verbosity to value.
- -q, --quiet
- Issue no messages whatsoever, including error messages. This is the same
as specifying -V 0.
- -h, --help
- Display a brief help message.
- -w, --version
- Display the release version.
Long options (beginning with --) may not work on all
systems. See the message printed out by mkzftree -h to see if
this applies to your system.
Inode change times (ctimes) are not copied. This is a system
limitation and applies to all file copy programs.
If using the parallel option (-z) the access times (atimes)
on directories may or may not be copied. If it is important that the atimes
on directories are copied exactly, avoid using -z.
Written by H. Peter Anvin <hpa@zytor.com>.
Copyright © 2001-2002 H. Peter Anvin.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.