File: AN-1.5a33

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star 1.5a67-1
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Subject: Star-1.5 source has been released

***************
Please have a look at the German open Source Center BerliOS at www.berlios.de
BerliOS will continue to support free hosting of cryptography projects even
when US laws change and don't allow to host cryptography projects in the USA.
Also look at sourcewell.berlios.de, the first Open Source announcement service
that itself is implemented as Open Source project.
***************

Star is the fastest tar archiver for UNIX

Star has many improvements compared to other tar 
implementations (including gnu tar). See below for a short description
of the highlight of star.

Star is located on:

ftp://ftp.berlios.de/pub/star

Changes since star-1.5.a32:

-	Fixed a bug with the "ustar" format introduced with star-1.5a24 that caused
	star not to split filenames between 100 and 256 chars bt complaining that
	the file name is too long.

-	Fixed a bug intruduced with star-1.5a31 while doing directory content comparison
	that caused verbose output to appear with -v also instead of the required -vv

-	Fixed a bug that is caused by the fact that you need to break clean
	layering in order to implement EOT induced media change.

	If a data section from a POSIX.1-2001 extended TAR header was hit by a 
	medium change, then the content of the original extended header data was
	overwritten by the data from the volume header.

	Star now implements a two level stack for the xheader data.

-	Fixed a bug with several calls to execl(2) that could cause problems on
	architectures where sizeof(int) != sizeof(char *). This is usually the
	case for 64 bit compilations. As the number of parameters actually used
	was 7, the problem was not only present on IA64 systems but also on 64 bit
	Sparc compilations as Sparc allows to pass only 6 parapeters via
	registers.

	Note that his is a problem caused by the bad C-99 documentation. A pointer
	constant is not a pointer! and the C-compiler is unable to do automatic
	type conversion for varargs parameters. All varars functions are affected
	that detect the end of a var arg list via a null pointer.

	Thanks to Christian Weisgerber for reporting.


-	First step towards reliable support for starting to read back multi volume
	archives past volume #0. Star now writes multi volume continuation headers
	for split files if called with -no-fifo. The FIFO case is much more complex
	and wil be implemented in a later version.

-	New POSIX.1-2001 header tag "SCHILY.offset" is used for multi volume contiuation
	offsets.

TODO: 
	-	Implement multi volume continuation headers if star is using
		a FIFO (default case). This comes next.

	-	Implement a autoconf extenstion to to deal with Linux with XFS
		where not all ACL handling is inside -lacl

	-	Implement Incremental Restore. This has been delayed in favor of
		Multi Volume continuation headers. Expect it before the end of this
		year.

For more information about CPIO support read README.pax
NOTE: 9000 new lines have been added to star between release 1.5a21 and 1.5a33. Please
test and report if you find any problems.


TODO:

Find a way to add multi volume skip headers to successive voluimes that allows to start
reading back a set of multi volume archives witout starting at volume #1.
This is definitely not a trivial task with a FIFO based tar implementation.

Check whether the UID/GID in the archive will fit into uid_t/gid_t and map 
the owner/group to nobody if thee are problems.

This does not seem to make sense for backup/restore operations on file servers:

	Files for which the owner/group name could not be resolved should be mapped
	to the UID/GID values for "nobody" found in /etc/passwd or /etc/group.
	If these names could not be resolved, then the old SunOS-4.x NFS
	values 65534 are used.


Revision history (short)

1982	First version on UNOS (extract only)
1985	Port to UNIX (fully functional version)
1985	Added pre Posix method of handling special files/devices
1986	First experiments with fifo as external process.
1993	Remote tape access
1993	diff option
1994	Fifo with shared memory integrated into star
1994	Very long filenames and sparse files
1994	Gnutar and Ustar(Posix.1-1988) handling added
1994	Xstar format (extended Posix.1-1988) defined and introduced
1995	Ported to many platforms
1999	Support for Win32 (Cygwin)
1999	base 256 support to overcome limitation with octal fields
2001	Large file support
2001	Support for POSIX.1-2001 extended headers
2001	Support for ACLs in POSIX.1-2001 extended headers
2002	Support for extended file flags in POSIX.1-2001 extended headers
2002	Support for extended inode meta data and meta files
2003	Error control added to allow to selectively ignore error contitions
2003	ED like pattern based file name substitution with -s '/from/to/[gp]'
2003	Efficient built in -copy mode
2003	Basic support for incremental dumps (incremental restore not yet ready)
2003	CPIO archive support
2003	New command 'spax' for POSIX.1 command line compatibility.
2003	New command 'scpio' for SUSv2 command line compatibility.
2003	New command 'suntar' for Solaris command line compatibility.
2003	New command 'gnutar' for GNU tar command line compatibility.
2003	Support for reliable multi-volume archives with media size detection

Supported platforms:

Virtually any! Known to work:

SunOS 4.x, Solaris (SunOS 5.x), Linux,
HP-UX, DG/UX, IRIX, AIX, FreeBSD, NetBSD, OpenBSD,
OSF-1, True-64, QNX, BeOS, Apollo Domain/OS, Next-STep, 
OS/2, SCO-openserver, SCO-unixware, Caldera OpenUnix,
Cygwin (Win32), Sony NewsOS,  BSDi (BSD/OS), QNX,
Apple Rhapsody, MacOS X, AmigaOS, GNU Hurd

Joerg

-------------------------------------------------------------
Star is the fastest known implementation of a tar archiver.
Star is able to make backups with far more than 10MB/s if the
disk and tape drive support such a speed. This is more than
double the speed that ufsdump will get.
In 1996, Ampex got 13.5 MB/s with their DLT tape drive which is a
modified professional digital video tape drive and not related
to Quantum's DLT type drives.
Ufsdump got a maximum speed of about 6MB/s with the same hardware.

Star development started 1982, the first complete implementation has 
been done in 1985. I never did my backups with other tools than star.

Its main advantages over other tar implementations are:

	fifo			- keeps the tape streaming.
				  This gives you faster backups than
				  you can achieve with ufsdump, if the
				  size of the filesystem is > 1 GByte.

	remote tape support	- a fast RMT implementation that has no
				  probems to saturate a 100 Mb/s network.

	accurate sparse files	- star is able to reproduce holes in sparse
				  files accurately if the OS includes 
				  the needed support functions. This is
				  currently true for Solaris-2.3 to
				  Solaris-2.5.1

	pattern matcher		- for a convenient user interface
				  (see manual page for more details).
				  To archive/extract a subset of files.

	sophisticated diff	- user tailorable interface for comparing
				  tar archives against file trees
				  This is one of the most interesting parts
				  of the star implementation.

	no namelen limitation	- Pathnames up to 1024 Bytes may be archived.
				  (The same limitation applies to linknames)
				  This limit may be expanded in future
				  without changing the method to record
				  long names.

	deals with all 3 times	- stores/restores all 3 times of a file
				  (even creation time)
				  With POSIX.1-2001 the times are in nanosecond
				  granularity.
				  Star may reset access time after doing
				  backup. On Solaris this can be done without
				  changing the ctime.

	does not clobber files	- more recent copies on disk will not be 
				  clobbered from tape
				  This may be the main advantage over other
				  tar implementations. This allows
				  automatically repairing of corruptions
				  after a crash & fsck (Check for differences
				  after doing this with the diff option).

	automatic byte swap	- star automatically detects swapped archives
				  and transparently reads them the right way

	automatic format detect	- star automatically detects several common
				  archive formats and adopts to them.
				  Supported archive types are:
				  Old tar, gnu tar, ansi tar, star,
				  POSIX.1-2001 PAX, Sun's Solaris tar.


	automatic compression detect - star automatically detects whether the
				  archive is compressed. If it has been
				  compressed with a compression program that
				  is compatible to decompression with "gzip"
				  or "bzip2", star automatically activates
				  decompression.

	fully ansi compatible	- Star is fully ANSI/Posix 1003.1 compatible.
				  See README.otherbugs for a complete
				  description of bugs found in other tar
				  implementations. Star is the first tar
				  implementation that supports POSIX.1-2001.

	support for ACLs and file flags - star supports Access Control Lists
				  and extended file flags (as found on FreeBSD
				  and Linux). Support to archive and restore
				  other file properties may be easily added.

	support for all inode metadata - star supports to put all inode
				  metadata on the archive. This allows future
				  versions of star to perform true
				  incremental dumps.

	sophisticated error control - allows to tell star which error types
				  should be ignored for wich file name pattern.
				  This allows to write backup scripts that give
				  no error messages for all problems that are
				  tolerable (e.g. growing log files).

	ED like filename substitution - star supports automated pattern rule based
				  file name substitution as documented for 'pax'.

	A fast built in -copy mode - allows to make fast and accurate copies and
				  directory tree comparisons.

Have a look at the manual page, it is included in the distribution.

Author:

Joerg Schilling
Seestr. 110
D-13353 Berlin
Germany

Email: 	joerg@schily.isdn.cs.tu-berlin.de, js@cs.tu-berlin.de
	schilling@fokus.fhg.de

Please mail bugs and suggestions to me.