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119 lines
3.7 KiB
Plaintext
Executable File
119 lines
3.7 KiB
Plaintext
Executable File
.\" zip_file_get_comment.mdoc -- get comment for file in zip
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.\" Copyright (C) 2006-2017 Dieter Baron and Thomas Klausner
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.\"
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.\" This file is part of libzip, a library to manipulate ZIP files.
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.\" The authors can be contacted at <libzip@nih.at>
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in
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.\" the documentation and/or other materials provided with the
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.\" distribution.
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.\" 3. The names of the authors may not be used to endorse or promote
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.\" products derived from this software without specific prior
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.\" written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
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.\" OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
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.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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.\" GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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.\" IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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.\" OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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.\" IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd December 18, 2017
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.Dt ZIP_FILE_GET_COMMENT 3
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.Os
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.Sh NAME
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.Nm zip_file_get_comment
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.Nd get comment for file in zip
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.Sh LIBRARY
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libzip (-lzip)
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.Sh SYNOPSIS
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.In zip.h
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.Ft const char *
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.Fn zip_file_get_comment "zip_t *archive" "zip_uint64_t index" "zip_uint32_t *lenp" "zip_flags_t flags"
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.Sh DESCRIPTION
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The
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.Fn zip_file_get_comment
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function returns the comment for the file at position
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.Ar index
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in the zip archive.
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The name is in UTF-8 encoding unless
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.Dv ZIP_FL_ENC_RAW
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was specified (see below).
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This pointer should not be modified or
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.Xr free 3 Ap d ,
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and becomes invalid when
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.Ar archive
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is closed.
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If
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.Ar lenp
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is not
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.Dv NULL ,
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the integer to which it points will be set to the length of the
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comment.
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If
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.Ar flags
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is set to
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.Dv ZIP_FL_UNCHANGED ,
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the original unchanged comment is returned.
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.Pp
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Additionally, the following
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.Ar flags
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are supported:
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.Bl -tag -width ZIP_FL_ENC_STRICTXX -offset indent
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.It Dv ZIP_FL_ENC_RAW
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Return the unmodified comment as it is in the ZIP archive.
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.It Dv ZIP_FL_ENC_GUESS
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(Default.)
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Guess the encoding of the comment in the ZIP archive and convert it
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to UTF-8, if necessary.
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.It Dv ZIP_FL_ENC_STRICT
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Follow the ZIP specification for file names and extend it to file
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comments, expecting them to be encoded in CP-437 in the ZIP archive
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(except if it is a UTF-8 comment from the special extra field).
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Convert it to UTF-8.
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.El
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.Em Note :
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ASCII is a subset of both CP-437 and UTF-8.
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.Sh RETURN VALUES
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Upon successful completion, a pointer to the comment is returned,
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or
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.Dv NULL
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if there is no comment.
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In case of an error,
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.Dv NULL
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is returned and the error code in
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.Ar archive
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is set to indicate the error.
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.Sh ERRORS
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.Fn zip_file_get_comment
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fails if:
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.Bl -tag -width Er
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.It Bq Er ZIP_ER_INVAL
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.Ar index
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is not a valid file index in
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.Ar archive .
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.El
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.Sh SEE ALSO
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.Xr libzip 3 ,
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.Xr zip_file_set_comment 3 ,
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.Xr zip_get_archive_comment 3
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.Sh HISTORY
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.Fn zip_file_get_comment
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was added in libzip 0.11.
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.Sh AUTHORS
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.An -nosplit
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.An Dieter Baron Aq Mt dillo@nih.at
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and
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.An Thomas Klausner Aq Mt tk@giga.or.at
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