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bestfit(1)		    General Commands Manual		    bestfit(1)

NAME
       bestfit - Optimally choose files	to be put on a CD (or other media)

SYNOPSIS
       bestfit [OPTION]... FILE... [-e COMMAND...]

DESCRIPTION
       This  manual page document describes the	bestfit	command.  Bestfit is a
       small program to	determine which	files that should be put on a  CD  (or
       other  media),  so  that	 as little space as possible is	wasted.	 It is
       very easy to use: you specify files on the command  line,  and  bestfit
       prints  the  names  of those that were selected.	Alternatively, bestfit
       can execute a command for each selected file (e.g. to move  them	 to  a
       different directory).

       This  problem  is also known as the 0-1 knapsack	problem. The algorithm
       implemented by bestfit solves instances of it optimally	in  theta(n*W)
       time,  where n is number	of files to choose between and W the amount of
       free space. This	may sound bad but since	W is number of blocks and  not
       bytes, this algorithm is	not that inefficient. Try it yourself and see.

       Due to the nature of this algorithm, bestfit uses a lot of memory - ap-
       proximately 1.5M	per file specified on command line.  As	 long  as  you
       have  enough  swap  space,  this	is usually not a problem since bestfit
       doesn't use all at the same time.

       Bestfit does (at	this time) not use any external	program	 such  as  mk-
       isofs  or mkhybrid to calculate the size	of files. Instead the file and
       directory sizes and rounded up towards the nearest  2048-byte  multiple
       and added together. (2048 bytes is the block size on ISO	images.)

       Bestfit can not account for all oddities	with ISO images	(for instance,
       there are multiple path tables, padding,	etc which is not easy to  cal-
       culate),	 therefore  exact  results can not always be produced. Bestfit
       may waste more space than necessary, or even tell you that  files  that
       won't fit actually fits.	(I consider the	latter to be a bug though.  If
       you encounter it, please	mail me.) In other words,  manually  selecting
       files  and  checking that they fit using	mkisofs	may in some cases give
       you better results than using bestfit.

OPTIONS
       These programs follow the usual GNU command line	syntax,	with long  op-
       tions starting with two dashes (`-').  A	summary	of options is included
       below.

       -8, --80min
	      Space is that of an empty	80 min CD. This	is the default.

       -7, --74min
	      Space is that of an empty	74 min CD.

       -d, --dirs-only
	      Ignore all non-directory arguments. (This	is useful when includ-
	      ing files	using wildcard/glob patterns.)

       -s, --space=BLOCKS
	      The maximum amount of space allowed to use, in blocks.

       -r, --reserve=BLOCKS
	      The  number  of blocks to	reserve	(usually 200 by	default). This
	      value is simple substracted from the space value before the  al-
	      gorithm is started.

       -e, --execute COMMAND...
	      Execute  a  command  for each selected file, instead of printing
	      the name on screen. All following	arguments after	--execute  (or
	      -e) are taken to be arguments to the command to execute for each
	      selected file. The string	`{}' is	replaced by the	 current  file
	      name being processed, and	can be used multiple times.

	      If  --invert  is	used as	well as	--execute, the command is exe-
	      cuted for	files that weren't selected instead.

       -i, --invert
	      Print names of those files that weren't selected (i.e.  did  not
	      fitting) instead.

       -v, --verbose
	      Explain what is being done.

       -q, --quiet
	      Output  no  diagnostic/information messages. (Error messages are
	      still printed.)

       -h, --help
	      Show summary of options.

       -v, --version
	      Output version information and exit.

EXAMPLES
       Assume we want burn the following directories on	a CD:

	 /store/dir1  40M
	 /store/dir2  67M
	 /store/dir3  38M
	 /store/dir4  112M
	 /store/dir5  130M
	 /store/dir6  82M
	 /store/dir7  240M
	 /store/dir8  56M
	 /store/dir9  94M

       These files won't fit on	an 80 min CD so	we need	to burn	them  on  two.
       We can have bestfit determine which files to burn on the	first CD:

	 $ bestfit /store/dir*
	 /store/dir2
	 /store/dir4
	 /store/dir5
	 /store/dir7
	 /store/dir8
	 /store/dir9
	 used 357888 of	439808 blocks (699.0M of 859.0M)
	 wasted	1912 of	359800 blocks (3.7M of 702.7M)

       Now maybe we want to move these files to	another	directory. bestfit can
       do this too:

	 $ bestfit /store/dir* -e mv -i	{} /store/to-burn/
	 used 357888 of	439808 blocks (699.0M of 859.0M)
	 wasted	1912 of	359800 blocks (3.7M of 702.7M)
	 $ ls /store/to-burn/foo
	 /store/dir2
	 /store/dir4
	 /store/dir5
	 /store/dir7
	 /store/dir8
	 /store/dir9

       The -i option was added to make move  interactive,  so  that  we	 won't
       overwrite  files	by mistake. Note that we don't need to terminate best-
       fit's options using --, because -e stops	bestfit	from  reading  further
       options.

AUTHOR
       bestfit was written by Oskar Liljeblad <oskar@osk.mine.nu>.

				April 23, 2001			    bestfit(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | AUTHOR

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