NAME¶
mkzftree - Create a zisofs/RockRidge compressed file tree
SYNOPSIS¶
mkzftree [
OPTIONS]...
INPUT OUTPUT
DESCRIPTION¶
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.
OPTIONS¶
- -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.
BUGS¶
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.
AUTHOR¶
Written by H. Peter Anvin <hpa@zytor.com>.
COPYRIGHT¶
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.
SEE ALSO¶
mkisofs(8)