pack200 man page on Ubuntu

Man page or keyword search:  
man Server   6591 pages
apropos Keyword Search (all sections)
Output format
Ubuntu logo
[printable version]

pack200(1)							    pack200(1)

NAME
       pack200 - JAR Packing tool

SYNOPSIS
       pack200 [ options ] output-file JAR-file

       Options	may be in any order. The last option on the command line or in
       a properties file supersedes all previously specified options.

	  options
	     Command-line options.

	  output-file
	     Name of the output file.

	  JAR-file
	     Name of the input file.

DESCRIPTION
       The pack200 tool is a Java application that transforms a JAR file  into
       a  compressed  pack200 file using the Java gzip compressor. The pack200
       files are highly compressed files that can be directly deployed, saving
       bandwidth and reducing download time.

       The pack200 tool uses several options to fine-tune and set the compres‐
       sion engine.

   Typical usage:
       % pack200 myarchive.pack.gz myarchive.jar

       In this	example,  myarchive.pack.gz  is	 produced  using  the  default
       pack200 settings.

OPTIONS
       -r --repack

	  Produces  a JAR file by packing the file myarchive.jar and unpacking
	  it. The resulting file can be used as an input to  the  jarsigner(1)
	  tool.

	     % pack200 --repack myarchive-packer.jar myarchive.jar

	     % pack200 --repack myarchive.jar

       -g --no-gzip

	  Produces a pack200 file. With this option a suitable compressor must
	  be used, and the target  system  must	 use  a	 corresponding	decom‐
	  presser.

	     % pack200 --no-gzip myarchive.pack myarchive.jar

       -G --strip-debug

	  Strips  attributes used for debugging from the output. These include
	  SourceFile, LineNumberTable, LocalVariableTable  and	LocalVariable‐
	  TypeTable.  Removing these attributes reduces the size of both down‐
	  loads and installations but reduces the usefulness of debuggers.

       -O --no-keep-file-order

	  The packer will reorder and transmit all elements. Additionally, the
	  packer may remove JAR directory names. This will reduce the download
	  size; however, certain JAR file optimizations, such as indexing, may
	  not work correctly.

       -Svalue --segment-limit=value

	  The  value is the estimated target size N (in bytes) of each archive
	  segment. If a single input file requires
	  more than N bytes, it will be given its own archive  segment.	 As  a
	  special case, a value of -1 will produce a single large segment with
	  all input files, while a value of 0 will  produce  one  segment  for
	  each class. Larger archive segments result in less fragmentation and
	  better compression, but processing them requires more memory.

	  The size of each segment is estimated by counting the size  of  each
	  input	 file to be transmitted in the segment, along with the size of
	  its name and other transmitted properties.

	  The default is 1000000 (a million  bytes).  This  allows  input  JAR
	  files	 of  moderate  size  to be transmitted in one segment. It also
	  puts a limit on memory requirements for packers and unpackers.

	  A 10MB JAR packed without this limit will typically pack  about  10%
	  smaller,  but	 the  packer may require a larger Java heap (about ten
	  times the segment limit).

       -Evalue --effort=value

	  If the value is set to a single decimal digit, the packer  will  use
	  the  indicated  amount of effort in compressing the archive. Level 1
	  may produce somewhat larger size and faster compression speed, while
	  level	 9  will  take much longer but may produce better compression.
	  The special value 0 instructs the packer to copy through the	origi‐
	  nal  JAR  file  directly  with  no compression. The JSR 200 standard
	  requires  any	 unpacker  to  understand  this	 special  case	as   a
	  pass-through of the entire archive.

	  The  default is 5, investing a modest amount of time to produce rea‐
	  sonable compression.

       -Hvalue --deflate-hint=value

	  Overrides the default, which preserves the  input  information,  but
	  may  cause the transmitted archive to be larger. The possible values
	  are:

	  true

	  false
	     In either case, the packer will set the  deflation	 hint  accord‐
	     ingly in the output archive, and will not transmit the individual
	     deflation hints of archive elements.

	  keep
	     Preserve deflation hints observed in the input JAR. (This is  the
	     default.)

       -mvalue --modification-time=value

	  The possible values are:

	  latest
	     The  packer  will	attempt	 to  determine the latest modification
	     time, among all the available entries in the original archive, or
	     the latest modification time of all the available entries in that
	     segment. This single value will be transmitted  as	 part  of  the
	     segment  and applied to all the entries in each segment. This can
	     marginally decrease the transmitted size of the  archive  at  the
	     expense of setting all installed files to a single date.

	  keep
	     Preserves	modification times observed in the input JAR. (This is
	     the default.)

       -Pfile --pass-file=file

	  Indicates that a file should be passed through bytewise with no com‐
	  pression.  By repeating the option, multiple files may be specified.
	  There is no pathname transformation, except  that  the  system  file
	  separator  is	 replaced by the JAR file separator "/". The resulting
	  file names must match exactly as strings with their  occurrences  in
	  the  JAR  file.  If  file  is a directory name, all files under that
	  directory will be passed.

       -Uaction --unknown-attribute=action

	  Overrides the default behavior; i.e., the classfile  containing  the
	  unknown  attribute will be passed through with the specified action.
	  The possible values for actions are:

	  error
	     The pack200 operation as a whole will fail with a suitable expla‐
	     nation.

	  strip
	     The  attribute  will  be  dropped. Note: Removing the required VM
	     attributes may cause Class Loader failures.

	  pass
	     Upon encountering this attribute, the entire class will be trans‐
	     mitted as though it is a resource.

       -Cattribute-name=layout --class-attribute=attribute-name=action
	-Fattribute-name=layout --field-attribute=attribute-name=action
	-Mattribute-name=layout --method-attribute=attribute-name=action
	-Dattribute-name=layout --code-attribute=attribute-name=action

	  With	the  above four options, the attribute layout can be specified
	  for a class entity, such as Class attribute, Field attribute, Method
	  attribute, and Code attribute. The attribute-name is the name of the
	  attribute for which the layout or action is being defined. The  pos‐
	  sible values for action are:

	  some-layout-string
	     The layout language is defined in the JSR 200 specification.

	  Example: --class-attribute=SourceFile=RUH

	  error
	     Upon encountering this attribute, the pack200 operation will fail
	     with a suitable explanation.

	  strip
	     Upon encountering this attribute, the attribute will  be  removed
	     from  the output. Note: removing VM-required attributes may cause
	     Class Loader failures.

	  Example: --class-attribute=CompilationID=pass will cause  the	 class
	  file	containing this attribute to be passed through without further
	  action by the packer.

       -f pack.properties --config-file=pack.properties

	  A configuration file, containing Java properties to  initialize  the
	  packer, may be specified on the command line.

	     % pack200 -f pack.properties myarchive.pack.gz myarchive.jar
	     % more pack.properties
	     # Generic properties for the packer.
	     modification.time=latest
	     deflate.hint=false
	     keep.file.order=false
	     # This option will cause the files bearing new attributes to
	     # be reported as an error rather than passed uncompressed.
	     unknown.attribute=error
	     # Change the segment limit to be unlimited.
	     segment.limit=-1

	  -v --verbose

	     Outputs  minimal  messages. Multiple specification of this option
	     will output more verbose messages.

	  -q --quiet

	     Specifies quiet operation with no messages.

	  -lfilename --log-file=filename

	     Specifies a log file to output messages.

	  -Joption

	     Passes option to the Java launcher called by pack200.  For	 exam‐
	     ple,  -J-Xms48m sets the startup memory to 48 megabytes. Although
	     it does not begin with  -X,  it  is  not  a  standard  option  of
	     pack200.  It is a common convention for -J to pass options to the
	     underlying VM executing applications written in Java.

EXIT STATUS
       The following exit values are returned:

	   0 for successful completion;

	  >0 if an error occurs.

SEE ALSO
	  * unpack200 - JAR Unpacking Tool

	  * unpack200(1), jar(1), jarsigner(1), attributes(5) man pages

	  * Java SE Documentation

	  * Java Deployment Guide - Pack200 @
	    http://java.sun.com/javase/6/docs/technotes/guides/deploy‐
	    ment/deployment-guide/pack200.html

	  * jar - Java Archive Tool

	  * jarsigner - JAR Signer tool @
	    http://java.sun.com/javase/6/docs/technotes/tools/solaris/jar‐
	    signer.html

NOTES
       This command should not be confused with pack(1). They are distinctly
       separate products.

       The Java SE API Specification provided with the SDK is the superseding
       authority, in case of discrepancies.

				  05 Aug 2006			    pack200(1)
[top]

List of man pages available for Ubuntu

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net