File: AN-1.5a02

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Newsgroups: comp.unix.admin,comp.unix.misc,alt.os.linux,alt.sys.sun,bln.comp.sun,bln.comp.unix,comp.os.linux.development.apps,comp.os.linux.misc,comp.sys.hp.apps,comp.sys.hp.misc,comp.sys.sgi.admin,comp.sys.sgi.apps,comp.sys.sgi.misc,comp.sys.sun.admin,comp.sys.sun.apps,comp.sys.sun.misc,comp.unix.aix,comp.unix.bsd.freebsd.misc,comp.unix.bsd.netbsd.misc,comp.unix.solaris,de.comp.os.linux.misc,de.comp.os.unix,linux.dev.admin,linux.dev.apps,maus.os.linux,maus.os.linux68k,maus.os.unix,uk.comp.os.linux
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.fokus.gmd.de/pub/unix/star

Changes since star-1.5.a01:

This is the first mid level step towards incremental backups.
1.5a03 or 1.5a04 will have the needed features to do incremental dumps.
Later versions  will include support for incremental restore.

-	Speed up the creation and remove length limitation from text tags
	in POSIX.1-2001 extended headers.

-	Speed up the regognition of POSIX.1-2001 extended header tags

-	Diff code now is able to compare the number of hard links to 
	a file if the archive is in -dump (exeustar) format.

-	List code now inclues hard link count in the long listing if the
	archive is in -dump (exeustar) format.

	This allows to see the difference in the number of hard links
	in diff mode if the archive is in POSIX.1-2001 extended -dump
	(exeustar) format.

-	Diff code now is able to compare the directory content if the
	archive is in -dump (exeustar) format.

	This allows star to tell whether the target directory on disk
	includes more files than the archive. This property will later
	be needed in incremental restore mode to remove files that
	have been removed between incremental dumps.

	NEW FEATURE: you now can compare two directory trees on disk
	with only one run of star by calling:

	star -C fromdir -c -dump . | star -C todir -diff -v

	or 

	star -C fromdir -c -dump . | star -C todir -diff -vv

	Star will now even complain if the directory 'todir' contains
	more files than the directory 'fromdir'.

-	New diffopt= 'dir' to tell star whether to compare or 
	dir content if the archive is in -dump (exeustar) format.

-	Enhance autoconf code for OS/2

-	Add socket lib definition to RULES to allow networking programs
	to work

-	Check whether readlink() is present to allow compilation on OS/2

-	Check whether symlink() is present to allow compilation on OS/2

-	Check whether chown() is present to allow compilation on OS/2

-	fexec.c in libschily now uses ';' as PATH Environment delimitor
	for EMX to allow path search to work on OS/2 too.

-	Call setmode(stdin/stdout, O_BINARY) on OS/2 EMX too.

-	Now call setmode(pipe, O_BINARY) on _both_ sides of the compress pipe.
	This should affect OS/2 _and_ Cygwin.

-	Work around a OS/2 EMX bug that causes star to dump core if the
	FIFO code correctly closes the unused parts of the pipes that
	are used o synchronize the cache.

	This was caused by attaching the shared memory segment too late
	to the child process.

-	For OS/2 EMX use ';' as PATH environment separator for PATH
	search in fexec.c

-	In create mode try always to avoid to need to call 

		telldir()/closedir()/opendir()/seekdir()
	
	by reading the directory content into allocated memory.
	This may cause problems on systems that are low with memory.

-	New option -lowmem to tell star to behave as before.
	With -lowmem is used, star does not malloc() the dir content
	and defaults to 1 MB FIFO size.

-	include the directory content in the extended POSIX.1-2001 header
	if in -dump mode.

	Star uses a vendor unique extended POSIX.1-2001 header tag named

		SCHILY.dir

        The tags

		SCHILY.ddev
		SCHILY.dino

	are reserved for future use with incremental dumps. They will be used
	only if the dump level is greater than 0. They are neded to allow star
	in incremental restore mode to know which files have been removed
	before the tape has completely passed. For this reason, star will be able
	to do incremental restores even if the filesystem is nearly full.


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

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.

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.gmd.de

Please mail bugs and suggestions to me.