mirror of https://github.com/mkerrisk/man-pages
120 lines
3.5 KiB
Groff
120 lines
3.5 KiB
Groff
.\" Copyright (C) 1994 Jochen Hein (Hein@Student.TU-Clausthal.de)
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.\"
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.\" %%%LICENSE_START(GPLv2+_SW_3_PARA)
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.\" This program is free software; you can redistribute it and/or modify
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.\" it under the terms of the GNU General Public License as published by
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.\" the Free Software Foundation; either version 2 of the License, or
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.\" (at your option) any later version.
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.\"
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.\" This program is distributed in the hope that it will be useful,
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.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
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.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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.\" GNU General Public License for more details.
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.\"
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.\" You should have received a copy of the GNU General Public
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.\" License along with this manual; if not, see
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.\" <http://www.gnu.org/licenses/>.
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.\" %%%LICENSE_END
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.\"
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.TH CHARMAP 5 2014-07-08 "GNU" "Linux Programmer's Manual"
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.SH NAME
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charmap \- character set description file
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.SH DESCRIPTION
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A character set description (charmap) defines all available characters
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and their encodings in a character set.
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.BR localedef (1)
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can use charmaps to create locale variants for different character sets.
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.SS Syntax
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The charmap file starts with a header that may consist of the
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following keywords:
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.TP
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.I <code_set_name>
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is followed by the name of the character map.
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.TP
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.I <comment_char>
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is followed by a character that will be used as the comment character
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for the rest of the file.
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It defaults to the number sign (#).
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.TP
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.I <escape_char>
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is followed by a character that should be used as the escape character
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for the rest of the file to mark characters that should be interpreted
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in a special way.
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It defaults to the backslash (\\).
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.TP
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.I <mb_cur_max>
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is followed by the maximum number of bytes for a character.
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The default value is 1.
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.TP
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.I <mb_cur_min>
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is followed by the minimum number of bytes for a character.
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This value must be less than or equal than
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.IR mb_cur_max .
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If not specified, it defaults to
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.IR mb_cur_max .
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.PP
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The character set definition section starts with the keyword
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.I CHARMAP
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in the first column.
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The following lines may have one of the two following forms to
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define the character set:
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.TP
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.I <character> <byte-sequence> <comment>
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This form defines exactly one character and its byte sequence,
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.I <comment>
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being optional.
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.TP
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.I <character>..<character> <byte-sequence> <comment>
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This form defines a character range and its byte sequence,
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.I <comment>
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being optional.
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.PP
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The character set definition section ends with the string
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.IR "END CHARMAP" .
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.PP
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The character set definition section may optionally be followed by a
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section to define widths of characters.
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.PP
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The
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.B WIDTH_DEFAULT
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keyword can be used to define the default width for all characters
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not explicitly listed.
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The default character width is 1.
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.PP
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The width section for individual characters starts with the keyword
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.I WIDTH
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in the first column.
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The following lines may have one of the two following forms to
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define the widths of the characters:
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.TP
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.I <character> <width>
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This form defines the width of exactly one character.
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.TP
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.I <character>...<character> <width>
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This form defines the width for all the characters in the range.
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.PP
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The width definition section ends with the string
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.IR "END WIDTH" .
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.SH FILES
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.TP
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.I /usr/share/i18n/charmaps
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Usual default character map path.
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.SH CONFORMING TO
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POSIX.2.
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.SH EXAMPLE
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The Euro sign is defined as follows in the
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.I UTF\-8
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charmap:
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.PP
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.nf
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<U20AC> /xe2/x82/xac
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.fi
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.SH SEE ALSO
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.BR iconv (1),
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.BR locale (1),
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.BR localedef (1),
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.BR locale (5),
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.BR charsets (7)
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