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BARCODE(1)			  GNU barcode			    BARCODE(1)

NAME
       barcode - a stand alone program to run the barcode library

SYNOPSIS
       barcode [-b - | string] [-e encoding] [-o - | outfile] [	other-flags ]

DESCRIPTION
       The  information	below is extracted from	the texinfo file, which	is the
       preferred source	of information.

       The barcode program is a	front-end to access some features of  the  li-
       brary  from the command line.  It is able to read user supplied strings
       from the	command	line or	a data file (standard input  by	 default)  and
       encode all of them.

OPTIONS
       barcode accepts the following options:

       --help or -h
	      Print a usage summary and	exit.

       -i filename
	      Identify	a  file	 where strings to be encoded are read from. If
	      missing (and if -b is not	used) it defaults to  standard	input.
	      Each data	line of	the input file will be used to create one bar-
	      code output.

       -o filename
	      Output file. It defaults to standard output.

       -b string
	      Specify a	single ``barcode'' string to be	encoded.   The	option
	      can  be  used multiple times in order to encode multiple strings
	      (this will result	in multi-page postscript output	or a table  of
	      barcodes if -t is	specified).  The strings must match the	encod-
	      ing chosen; if it	doesn't	match the program will print a warning
	      to  stderr  and  generate	 ``blank''  output (although not zero-
	      length).	Please note that a string including  spaces  or	 other
	      special characters must be properly quoted.

       -e encoding
	      encoding	is  the	name of	the chosen encoding format being used.
	      It defaults to the value of the environment variable BARCODE_EN-
	      CODING or	to auto	detection if the environment is	also unset.

       -g geometry
	      The  geometry  argument is of the	form ``[<width>	x <height>] [+
	      <xmargin>	+ <ymargin>]'' (with no	intervening spaces).  Unspeci-
	      fied  margin  values  will result	in no margin; unspecified size
	      results in default size.	The specified values  represent	 print
	      points by	default, and can be inches, millimeters	or other units
	      according	to the -u option or the	BARCODE_UNIT environment vari-
	      able.   The  argument  is	used to	place the printout code	on the
	      page. Note that an additional white margin of 10 points is added
	      to  the printout.	If the option is unspecified, BARCODE_GEOMETRY
	      is looked	up in the environment, if missing a default  size  and
	      no margin	(but the default 10 points) are	used.

       -t table-geometry
	      Used  to print several barcodes to a single page,	this option is
	      meant to be used to print	stickers. The argument is of the  form
	      ``<columns>  x  <lines>  [+  <leftmargin>	 +  <bottommargin>  [-
	      <rightmargin> [- <topmargin>]]]''	(with no intervening  spaces);
	      if missing, the top and right margin will	default	to be the same
	      as the bottom and	left margin.  The  margins  are	 specified  in
	      print  points  or	in the chosen unit (see	-u below).  If the op-
	      tion is not specified, BARCODE_TABLE is looked up	in  the	 envi-
	      ronment, otherwise no table is printed and each barcode will get
	      its own page.  The size (but not the position) of	a barcode item
	      within  a	 table	can  also be selected using -g (see "geometry"
	      above), without struggling with external and  internal  margins.
	      I	still think management of geometries in	a table	is suboptimal,
	      but I can't make it better  without  introducing	incompatibili-
	      ties.

       -m margin(s)
	      Specifies	 an internal margin for	each sticker in	the table. The
	      argument is of the form ``<xmargin>,<ymargin>'' and  the	margin
	      is applied symmetrically to the sticker. If unspecified, the en-
	      vironment	variable BARCODE_MARGIN	is used	or a default  internal
	      margin of	10 points is used.

       -n     ``Numeric'' output: don't	print the ASCII	form of	the code, only
	      the bars.

       -c     No checksum character (for encodings that	allow  it,  like  code
	      39, other	codes, like UPC	or EAN,	ignore this option).

       -E     Encapsulated postscript (default is normal postscript). When the
	      output is	generated as EPS only one barcode is encoded.

       -P     PCL output. Please note that the Y direction goes	 from  top  to
	      bottom for PCL, and the origin for an image is the top-left cor-
	      ner instead of the bottom-left

       -p pagesize
	      Specify a	non-default page size. The page	size can be  specified
	      in   millimeters,	  inches   or	plain  numbers	(for  example:
	      "210x297mm", "8.5x11in", "595x842").  A  page  specification  as
	      numbers will be interpreted according to the current unit	speci-
	      fication (see -u below). If libpaper is available, you can  also
	      specify the page size with its name, like	"A3" or	"letter" (lib-
	      paper is a standard component of Debian GNU/Linux,  but  may  be
	      missing  elsewhere).  The	 default page size is your system-wide
	      default if libpaper is there, A4 otherwise.

       -u unit
	      Choose the unit used in size specifications. Accepted values are
	      ``mm'',  ``cm'', ``in'' and ``pt''. By default, the program will
	      check BARCODE_UNIT in the	environment, and assume	points	other-
	      wise  (this  behaviour is	compatible with	0.92 and previous ver-
	      sions. If	-u appears more	than once, each	instance will modified
	      the  behaviour  for  the	arguments at its right,	as the command
	      line is processes	left to	right. The  program  internally	 works
	      with  points, and	any size is approximated to the	nearest	multi-
	      ple of one point.	The -u option affect -g	(geometry), -t (table)
	      and -p (page size).

ENCODING TYPES
       The  program  encodes  text  strings  passed either on the command line
       (with -b) or retrieved from standard input. The text representation  is
       interpreted  according  to  the following rules.	When auto-detection of
       the encoding is enabled (i.e, no	explicit encoding type is  specified),
       the  encoding  types  are  scanned to find one that can digest the text
       string.	The following list of supported	types is sorted	 in  the  same
       order  the  library  uses when auto-detecting a suitable	encoding for a
       string.

       EAN    The EAN frontend is similar to UPC; it accepts strings  of  dig-
	      its,  12 or 7 characters long. Strings of	13 or 8	characters are
	      accepted if the provided checksum	digit is  correct.   I	expect
	      most  users  to feed input without a checksum, though. The add-2
	      and add-5	extension are accepted for both	 the  EAN-13  and  the
	      EAN-8  encodings.	  The  following  are  example	of valid input
	      strings: ``123456789012''	 (EAN-13),  ``1234567890128''  (EAN-13
	      wih  checksum),	``1234567'' (EAN-8), ``12345670	12345''	(EAN-8
	      with checksum  and  add-5),  ``123456789012  12''	 (EAN-13  with
	      add-2), ``123456789012 12345'' (EAN-13 with add-5).

       UPC    The UPC frontend accepts only strings made up of digits (and, if
	      a	supplemental encoding is used, a blank to  separate  it).   It
	      accepts  strings of 11 or	12 digits (UPC-A) and 6	or 7 or	8 dig-
	      its (UPC-E).

       The 12th	digit of UPC-A is the checksum and is added by the library  if
       not  specified  in  the input; if it is specified, it must be the right
       checksum	or the code is rejected	as invalid.  For UPC-E,	 6  digit  are
       considered  to  be  the middle part of the code,	a leading 0 is assumed
       and the checksum	is added; 7 digits are either considered  the  initial
       part (leading digit 0 or	1, checksum missing) or	the final part (check-
       sum specified, leading 0	assumed); 8 digits are considered  to  be  the
       complete	 code,	with  leading 0	or 1 and checksum.  For	both UPC-A and
       UPC-E, a	trailing string	of 2 digits or 5 digits	is accepted  as	 well.
       Therefore,  the following are examples of valid strings that can	be en-
       coded as	UPC:  ``01234567890''  (UPC-A)	``012345678905''  (UPC-A  with
       checksum),  ``012345''  (UPC-E),	 ``01234567890 12'' (UPC-A, add-2) and
       ``01234567890 12345'' (UPC-A, add-5), ``0123456	12''  (UPC-E,  add-2).
       Please  note  that when setting BARCODE_ANY to auto-detect the encoding
       to be used, 12-digit strings and	7-digit	strings	will always be identi-
       fied as EAN. This because I expect most user to provide input without a
       checksum. If you	need to	specify	UPC-with-checksum as  input  you  must
       explicitly set BARCODE_UPC as a flag or use -e upc on the command line.

       ISBN   ISBN  numbers  are  encoded  as EAN-13 symbols, with an optional
	      add-5 trailer. The ISBN frontend of  the	library	 accepts  real
	      ISBN numbers and deals with any hyphen and, if present, the ISBN
	      checksum character before	encoding data.	Valid  representations
	      for   ISBN   strings   are   for	 example:   ``1-56592-292-1'',
	      ``3-89721-122-X''	and ``3-89721-122-X 06900}''.

       code 128-B
	      This encoding can	represent all of the  printing	ASCII  charac-
	      ters,  from  the	space (32) to DEL (127). The checksum digit is
	      mandatory	in this	encoding.

       code 128-C
	      The ``C''	variation of Code-128 uses Code-128 symbols to	repre-
	      sent  two	 digits	 at a time (Code-128 is	made up	of 104 symbols
	      whose interpretation is controlled by  the  start	 symbol	 being
	      used).  Code 128-C is thus the most compact way to represent any
	      even number of digits. The encoder refuses to deal with  an  odd
	      number  of  digits  because  the	caller	is expected to provide
	      proper padding to	an even	number of digits. (Since Code-128  in-
	      cludes  control  symbols	to switch charset, it is theoretically
	      possible to represent the	odd digit as a	Code  128-A  or	 128-B
	      symbol, but this tool doesn't currently implement	this option).

       code 128	raw
	      Code-128	 output	 represented  symbol-by-symbol	in  the	 input
	      string.  To override part	of  the	 problems  outlined  below  in
	      specifying code128 symbols, this pseudo-encoding allows the used
	      to specify a list	of code128 symbols separated by	 spaces.  Each
	      symbol  is represented by	a number in the	range 0-105.  The list
	      should include the leading character.The checksum	and  the  stop
	      character	 are  automatically  added by the library. Most	likely
	      this pseudo-encoding will	be used	with BARCODE_NO_ASCII and some
	      external program to supply the printed text.

       code 39
	      The  code-39  standard can encode	uppercase letters, digits, the
	      blank space, plus, minus,	dot,  star,  dollar,  slash,  percent.
	      Any  string that is only composed	of such	characters is accepted
	      by the code-39 encoder. To avoid loosing	information,  the  en-
	      coder  refuses  to encode	mixed-case strings (a lowercase	string
	      is nonetheless accepted as a shortcut, but is encoded as	upper-
	      case).

       interleaved 2 of	5
	      This  encoding  can only represent an even number	of digits (odd
	      digits are represented by	bars, and even digits  by  the	inter-
	      leaving spaces). The name	stresses the fact that two of the five
	      items (bars or spaces) allocated to each symbol are wide,	 while
	      the rest are narrow. The checksum	digit is optional (can be dis-
	      abled via	BARCODE_NO_CHECKSUM).  Since the number	of digits, in-
	      cluding  the  checksum, must be even, a leading zero is inserted
	      in the string being encoded  if  needed  (this  is  specifically
	      stated in	the specs I have access	to).

       code 128
	      Automatic	 selection between alphabet A, B and C of the Code-128
	      standard.	This encoding can represent all	ASCII symbols, from  0
	      (NUL)  to	 127 (DEL), as well as four special symbols, named F1,
	      F2, F3, F4. The set of symbols available in this encoding	is not
	      easily  represented as input to the barcode library, so the fol-
	      lowing convention	is used.  In the input string, which is	 a  C-
	      language	null-terminated	string,	the NUL	char is	represented by
	      the value	128 (0x80, 0200) and the F1-F4 characters  are	repre-
	      sented by	the values 193-196 (0xc1-0xc4, 0301-0304).  The	values
	      have been	chosen to ease	their  representation  as  escape  se-
	      quences.

       Since  the shell	doesn't	seem to	interpret escape sequences on the com-
       mand line, the "-b" option cannot  be  easily  used  to	designate  the
       strings	to  be	encoded. As a workaround you can resort	to the command
       echo, either within back-ticks or used separately to create a file that
       is then fed to the standard-input of barcode -- assuming	your echo com-
       mand processes escape sequences.	 The newline character	is  especially
       though to encode	(but not impossible unless you use a csh variant.

       These  problems only apply to the command-line tool; the	use of library
       functions doesn't give any problem. In needed, you can use  the	``code
       128 raw'' pseudo-encoding to represent code128 symbols by their numeri-
       cal value. This encoding	is used	late in	the  auto-selection  mechanism
       because (almost)	any input string can be	represented using code128.

       Codabar
	      Codabar can encode the ten digits	and a few special symbols (mi-
	      nus, plus, dollar,  colon,  bar,	dot).  The  characters	``A'',
	      ``B'',  ``C''  and  ``D''	 are  used to represent	four different
	      start/stop characters. The input string to the  barcode  library
	      can  include  the	 start and stop	characters or not include them
	      (in which	case ``A'' is used as start and	``B'' as stop).	 Start
	      and stop characters in the input string can be either all	lower-
	      case or all uppercase and	are always printed as uppercase.

       Plessey
	      Plessey barcodes can encode all the hexadecimal  digits.	Alpha-
	      betic digits in the input	string must either be all lowercase or
	      all uppercase. The output	text is	always uppercase.

       MSI    MSI can only encode the decimal digits. While the	standard spec-
	      ifies either one or two check digits, the	current	implementation
	      in this library only generates one check digit.

       code 93
	      The code-93 standard can natively	encode	48  different  charac-
	      ters,  including	uppercase  letters,  digits,  the blank	space,
	      plus, minus, dot,	star, dollar, slash, percent, as well as  five
	      special  characters:   a	start/stop  delimiter  and four	"shift
	      characters" used for extended encoding.	 Using this  "extended
	      encoding"	 method, any standard 7-bit ASCII character can	be en-
	      coded, but it takes up two symbol	 lengths  in  barcode  if  the
	      character	 is  not  natively supported (one of the 48).  The en-
	      coder here fully implements the code 93 encoding standard.   Any
	      characters  natively supported (A-Z, 0-9,	".+-/$ encoded as such
	      -	for any	other characters (such as lower	case  letters,	brack-
	      ets, parentheses,	etc.), the encoder will	revert to extended en-
	      coding.  As a note, the option  to  exclude  the	checksum  will
	      eliminate	 the two modulo-47 checksums (called C and K) from the
	      barcode, but this	probably will make it unreadable  by  9	 These
	      checksums	 are  specified	 to be used at the firmware level, and
	      their absence will be interpreted	as an invalid barcode.

PCL OUTPUT
       While the default output	is Postscript (possibly	EPS),  and  Postscript
       can  be post-processed to almost	anything, it is	sometimes desirable to
       create output directly usable by	the specific printer at	hand.  PCL  is
       currently  supported  as	an output format for this reason.  Please note
       that the	Y coordinate for PCL goes from top to bottom, while for	 Post-
       script  it  goes	 from bottom to	top. Consistently, while in Postscript
       you specify the bottom-left corner as origin, for PCL you  specify  the
       top-left	corner.

       Barcode	output for PCL Printers	(HP LaserJet and compatibles), was de-
       veloped using PCL5 Reference manuals from HP.  that  really  refers  to
       these printers:

       LaserJet	III, III P, III	D, III Si,

       LaserJet	4 family

       LaserJet	5 family

       LaserJet	6 family

       Color LaserJet

       DeskJet 1200 and	1600.

       However,	 barcode  printing  uses  a very small subset of PCL, probably
       also LaserJet II	should print it	without	 problem,  but	the  resulting
       text may	be horrible.

       The  only real difference from one printer to another really depends on
       which font are available	in the printer,	used in	printing the label as-
       sociated	to the bars (if	requested).

       Earlier	LaserJet  supports only	bitmaps	fonts, so these	are not	"scal-
       able". (Ljet II ?), Also	these fonts, when available, have a  specified
       direction, and not all of them are available in both Portrait and Land-
       scape mode.

       From LaserJet 4 series, (except 4L/5L that are  entry-level  printers),
       Arial  scalable	font  should  be available, so it's the	"default font"
       used by this program.

       LaserJet	III series printers (and 4L, 5L), don't	feature	"Arial"	 as  a
       resident	 font,	so  you	should use BARCODE_OUT_PCL_III instead of BAR-
       CODE_OUT_PCL., and font the font	used will be "Univers" instead of "Ar-
       ial".

       Results	on compatible printers,	may depend on consistency of PCL5 com-
       patibility, in doubt, try BARCODE_OUT_PCL_III

       PJL commands are	not used here, as it's not very	compatible.

       Tested Printers:

       Hp LaserJet 4050

       Hp LaserJet 2100

       Epson N-1200 emul PCL

       Toshiba DP2570 (copier) + PCL option

       Epson EPL-7100 emul. HP LaserJet	II: bars print fine but	text is	bad.

BUGS
       The current management of borders/margins  is  far  from	 optimal.  The
       ``default''  margin applied by the library interferes with the external
       representation, but I feel it is	mandatory to  avoid  creating  barcode
       output with no surrounding white	space (the problem is especially rele-
       vant for	EPS output).

       EAN-128 is not (yet) supported. I plan to implement it pretty soon  and
       then bless the package as version 1.0.

SEE ALSO
       barcode(3)

AUTHORS
       Alessandro Rubini <rubini@gnu.org> (maintainer)

       Leonid A. Broukhis <leob@mailcom.com> (several encodings)

       Andrea Scopece <a.scopece@tin.it> (PCL output)

4th Berkeley Distribution	 October 2001			    BARCODE(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | ENCODING TYPES | PCL OUTPUT | BUGS | SEE ALSO | AUTHORS

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