167 lines
4.5 KiB
Groff
167 lines
4.5 KiB
Groff
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.\" Automatically generated from an mdoc input file. Do not edit.
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.\" zip_fopen.mdoc -- open file in zip archive for reading
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.\" Copyright (C) 2003-2017 Dieter Baron and Thomas Klausner
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.\"
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.\" This file is part of libzip, a library to manipulate ZIP archives.
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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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.TH "ZIP_FOPEN" "3" "December 18, 2017" "NiH" "Library Functions Manual"
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.nh
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.if n .ad l
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.SH "NAME"
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\fBzip_fopen\fR,
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\fBzip_fopen_index\fR
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\- open file in zip archive for reading
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.SH "LIBRARY"
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libzip (-lzip)
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.SH "SYNOPSIS"
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\fB#include <zip.h>\fR
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.sp
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\fIzip_file_t *\fR
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.br
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.PD 0
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.HP 4n
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\fBzip_fopen\fR(\fIzip_t\ *archive\fR, \fIconst\ char\ *fname\fR, \fIzip_flags_t\ flags\fR);
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.PD
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.PP
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\fIzip_file_t *\fR
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.br
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.PD 0
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.HP 4n
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\fBzip_fopen_index\fR(\fIzip_t\ *archive\fR, \fIzip_uint64_t\ index\fR, \fIzip_flags_t\ flags\fR);
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.PD
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.SH "DESCRIPTION"
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The
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\fBzip_fopen\fR()
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function opens the file name
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\fIfname\fR
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in
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\fIarchive\fR.
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The
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\fIflags\fR
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argument specifies how the name lookup should be done, according to
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the values are described in
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zip_name_locate(3).
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Also, the following values may be
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\fIor\fR'ed
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to it.
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.RS 6n
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.TP 19n
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\fRZIP_FL_COMPRESSED\fR
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Read the compressed data.
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Otherwise the data is uncompressed by
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\fBzip_fread\fR().
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.TP 19n
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\fRZIP_FL_UNCHANGED\fR
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Read the original data from the zip archive, ignoring any changes made
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to the file.
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.RE
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.PP
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The
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\fBzip_fopen_index\fR()
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function opens the file at position
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\fIindex\fR.
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.PP
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If encrypted data is encountered, the functions call
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zip_fopen_encrypted(3)
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or
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zip_fopen_index_encrypted(3)
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respectively, using the default password set with
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zip_set_default_password(3).
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.SH "RETURN VALUES"
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Upon successful completion, a
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\fIstruct zip_file\fR
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pointer is returned.
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Otherwise,
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\fRNULL\fR
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is returned and the error code in
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\fIarchive\fR
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is set to indicate the error.
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.SH "ERRORS"
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.TP 19n
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[\fRZIP_ER_CHANGED\fR]
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The file data has been changed.
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.TP 19n
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[\fRZIP_ER_COMPNOTSUPP\fR]
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The compression method used is not supported.
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.TP 19n
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[\fRZIP_ER_ENCRNOTSUPP\fR]
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The encryption method used is not supported.
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.TP 19n
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[\fRZIP_ER_MEMORY\fR]
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Required memory could not be allocated.
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.TP 19n
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[\fRZIP_ER_NOPASSWD\fR]
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The file is encrypted, but no password has been provided.
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.TP 19n
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[\fRZIP_ER_READ\fR]
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A file read error occurred.
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.TP 19n
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[\fRZIP_ER_SEEK\fR]
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A file seek error occurred.
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.TP 19n
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[\fRZIP_ER_WRONGPASSWD\fR]
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The provided password does not match the password used for encryption.
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Note that some incorrect passwords are not detected by the check done by
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\fBzip_fopen\fR().
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.TP 19n
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[\fRZIP_ER_ZLIB\fR]
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Initializing the zlib stream failed.
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.PP
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The function
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\fBzip_fopen\fR()
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may also fail and set
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\fIzip_err\fR
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for any of the errors specified for the routine
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zip_name_locate(3).
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.PP
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The function
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\fBzip_fopen_index\fR()
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may also fail with
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\fRZIP_ER_INVAL\fR
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if
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\fIindex\fR
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is invalid.
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.SH "SEE ALSO"
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libzip(3),
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zip_fclose(3),
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zip_fread(3),
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zip_fseek(3),
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zip_get_num_entries(3),
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zip_name_locate(3),
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zip_set_default_password(3)
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.SH "HISTORY"
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\fBzip_fopen\fR()
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and
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\fBzip_fopen_index\fR()
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were added in libzip 1.0.
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.SH "AUTHORS"
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Dieter Baron <\fIdillo@nih.at\fR>
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and
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Thomas Klausner <\fItk@giga.or.at\fR>
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