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109 lines
4.1 KiB
109 lines
4.1 KiB
4 years ago
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.\" Copyright (c) Free Software Foundation, Inc.
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.\"
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.\" This is free documentation; you can redistribute it and/or
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.\" modify it under the terms of the GNU General Public License as
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.\" published by the Free Software Foundation; either version 3 of
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.\" the License, or (at your option) any later version.
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.\"
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.\" References consulted:
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.\" OpenGroup's Single Unix specification http://www.UNIX-systems.org/online.html
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.\" POSIX 2001 draft6
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.\"
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.TH ICONV 1 "March 31, 2007" "GNU" "Linux Programmer's Manual"
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.SH NAME
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iconv \- character set conversion
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.SH SYNOPSIS
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.nf
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iconv [\fIOPTION\fP...] [\fB\-f\fP \fIencoding\fP] [\fB\-t\fP \fIencoding\fP] [\fIinputfile\fP ...]
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iconv \fB\-l\fP
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.fi
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.SH DESCRIPTION
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The \fBiconv\fP program converts text from one encoding to another encoding.
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More precisely, it converts \fBfrom\fP the encoding given for the \fB\-f\fP
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option \fBto\fP the encoding given for the \fB\-t\fP option. Either of these
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encodings defaults to the encoding of the current locale. All the
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\fIinputfile\fPs are read and converted in turn; if no \fIinputfile\fP is
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given, the standard input is used. The converted text is printed to standard
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output.
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.PP
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The encodings permitted are system dependent. For the libiconv implementation,
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they are listed in the iconv_open(3) manual page.
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.PP
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Options controlling the input and output format:
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.TP
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\fB\-f\fP \fIencoding\fP, \fB\-\-from\-code=\fP\fIencoding\fP
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Specifies the encoding of the input.
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.TP
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\fB\-t\fP \fIencoding\fP, \fB\-\-to\-code=\fP\fIencoding\fP
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Specifies the encoding of the output.
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.PP
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Options controlling conversion problems:
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.TP
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\fB\-c\fP
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When this option is given, characters that cannot be converted are silently
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discarded, instead of leading to a conversion error.
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.TP
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\fB\-\-unicode\-subst=\fP\fIformatstring\fP
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When this option is given, Unicode characters that cannot be represented in
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the target encoding are replaced with a placeholder string that is constructed
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from the given \fIformatstring\fP, applied to the Unicode code point. The
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\fIformatstring\fP must be a format string in the same format as for the
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.I printf
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command or the
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.I printf()
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function, taking either no argument or exactly one unsigned integer argument.
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.TP
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\fB\-\-byte\-subst=\fP\fIformatstring\fP
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When this option is given, bytes in the input that are not valid in the source
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encoding are replaced with a placeholder string that is constructed from the
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given \fIformatstring\fP, applied to the byte's value. The \fIformatstring\fP
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must be a format string in the same format as for the
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.I printf
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command or the
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.I printf()
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function, taking either no argument or exactly one unsigned integer argument.
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.TP
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\fB\-\-widechar\-subst=\fP\fIformatstring\fP
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When this option is given, wide characters in the input that are not valid in
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the source encoding are replaced with a placeholder string that is constructed
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from the given \fIformatstring\fP, applied to the byte's value. The
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\fIformatstring\fP must be a format string in the same format as for the
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.I printf
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command or the
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.I printf()
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function, taking either no argument or exactly one unsigned integer argument.
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.PP
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Options controlling error output:
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.TP
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\fB\-s\fP, \fB\-\-silent\fP
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When this option is given, error messages about invalid or unconvertible
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characters are omitted, but the actual converted text is unaffected.
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.PP
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The \fBiconv \-l\fP or \fBiconv \-\-list\fP command lists the names of the
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supported encodings, in a system dependent format. For the libiconv
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implementation, the names are printed in upper case, separated by whitespace,
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and alias names of an encoding are listed on the same line as the encoding
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itself.
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.SH EXAMPLES
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.TP
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\fBiconv \-f ISO\-8859\-1 \-t UTF\-8\fP
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converts input from the old West-European encoding ISO\-8859\-1 to Unicode.
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.PP
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.nf
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\fBiconv \-f KOI8\-R \-\-byte\-subst="<0x%x>"\fP
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\fB \-\-unicode\-subst="<U+%04X>"\fP
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.fi
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.RS
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converts input from the old Russian encoding KOI8\-R to the locale encoding,
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substituting an angle bracket notation with hexadecimal numbers for invalid
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bytes and for valid but unconvertible characters.
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.RE
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.TP
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\fBiconv \-\-list\fP
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lists the supported encodings.
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.SH "CONFORMING TO"
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POSIX:2001
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.SH "SEE ALSO"
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.BR iconv_open (3),
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.BR locale (7)
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