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)