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)

zisofs-tools                                      30 July 2001                                       MKZFTREE(1)