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genxlt - Generates a codeset conversion table
genxlt [-f outputfile] [inputfile]
Specifies that the generated version of the codeset conversion table be
placed in the file specified by outputfile.
The iconv subsystem can use either an algorithmic or a table converter to
convert data from one codeset to another. The genxlt command creates a
table converter to be used by the iconv subsystem.
The genxlt command reads a source codeset conversion table file from
inputfile and writes the compiled version to outputfile. If inputfile is
not specified, standard input is used. If outputfile is not specified,
standard output is used. The source codeset conversion table file contains
directives that are acted upon by the genxlt command to produce the
The format of a translation source file is as follows:
· Lines whose initial nonwhite-space character is the # (number sign)
are treated as comment lines.
· Null lines and lines consisting only of white-space characters are
treated as comment lines.
· Noncomment lines have to be of the following form:
source target comment
If source is found in the source codeset conversion table file multiple
times, the last entry is used in the compilation of the translation table.
The source and target arguments must be in the range of 0x00 through 0xff,
inclusive; this restricts the table to 8-bit codesets. The conversion table
must define all of the 256 possible source values; otherwise, processing
the table results in an error.
The following is an excerpt of a codeset conversion table:
0x80 0xc7 C cedilla
0x81 0xfc u diaeresis
0x82 0xe9 e acute
0x83 0xe2 a circumflex
0x84 0xe4 a diaeresis
0x85 0x40 a grave
The name of the file generated by the genxlt command must use the following
naming convention in order for the iconv subsystem to recognize the file as
a valid converter.
conversion table file: "ISO8859-1-GL_ISO8859-1"
The conversion table file name is formed by concatenating the tocode file
name onto the fromcode file name, with an underscore character between the
two. The compiled conversion table must reside in the
/usr/lib/nls/loc/iconvTable directory or, if the LOCPATH variable is
defined, in an iconvTable directory subordinate to the LOCPATH directory.
Otherwise, the iconv command does not find the table.
The LOCPATH variable also overrides the default search path
(/usr/lib/nls/loc) that is used to find locales. If this variable is
defined, it must therefore specify a search path that application and
system software can use to find both locales and converters. The
LOCPATH variable is not defined by any standard, so use of the
variable should be limited to testing locales or converters under
If successful, the genxlt command exits with a value of 0 (zero). If an
unknown flag is detected, or the specified input file or output file cannot
be opened, the genxlt command is unsuccessful and exits with a value of 1.
If a syntax error is detected in the input stream, the genxlt command will
exit immediately with a value of 2, and write to standard error the line
numbers where the syntax error occurred.
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