.\" Automatically generated from an mdoc input file.  Do not edit.
.\" zip_fopen.mdoc -- open file in zip archive for reading
.\" Copyright (C) 2003-2017 Dieter Baron and Thomas Klausner
.\"
.\" This file is part of libzip, a library to manipulate ZIP archives.
.\" The authors can be contacted at <libzip@nih.at>
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in
.\"    the documentation and/or other materials provided with the
.\"    distribution.
.\" 3. The names of the authors may not be used to endorse or promote
.\"    products derived from this software without specific prior
.\"    written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
.\" OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
.\" GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
.\" IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
.\" OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
.\" IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.TH "ZIP_FOPEN" "3" "December 18, 2017" "NiH" "Library Functions Manual"
.nh
.if n .ad l
.SH "NAME"
\fBzip_fopen\fR,
\fBzip_fopen_index\fR
\- open file in zip archive for reading
.SH "LIBRARY"
libzip (-lzip)
.SH "SYNOPSIS"
\fB#include <zip.h>\fR
.sp
\fIzip_file_t *\fR
.br
.PD 0
.HP 4n
\fBzip_fopen\fR(\fIzip_t\ *archive\fR, \fIconst\ char\ *fname\fR, \fIzip_flags_t\ flags\fR);
.PD
.PP
\fIzip_file_t *\fR
.br
.PD 0
.HP 4n
\fBzip_fopen_index\fR(\fIzip_t\ *archive\fR, \fIzip_uint64_t\ index\fR, \fIzip_flags_t\ flags\fR);
.PD
.SH "DESCRIPTION"
The
\fBzip_fopen\fR()
function opens the file name
\fIfname\fR
in
\fIarchive\fR.
The
\fIflags\fR
argument specifies how the name lookup should be done, according to
the values are described in
zip_name_locate(3).
Also, the following values may be
\fIor\fR'ed
to it.
.RS 6n
.TP 19n
\fRZIP_FL_COMPRESSED\fR
Read the compressed data.
Otherwise the data is uncompressed by
\fBzip_fread\fR().
.TP 19n
\fRZIP_FL_UNCHANGED\fR
Read the original data from the zip archive, ignoring any changes made
to the file.
.RE
.PP
The
\fBzip_fopen_index\fR()
function opens the file at position
\fIindex\fR.
.PP
If encrypted data is encountered, the functions call
zip_fopen_encrypted(3)
or
zip_fopen_index_encrypted(3)
respectively, using the default password set with
zip_set_default_password(3).
.SH "RETURN VALUES"
Upon successful completion, a
\fIstruct zip_file\fR
pointer is returned.
Otherwise,
\fRNULL\fR
is returned and the error code in
\fIarchive\fR
is set to indicate the error.
.SH "ERRORS"
.TP 19n
[\fRZIP_ER_CHANGED\fR]
The file data has been changed.
.TP 19n
[\fRZIP_ER_COMPNOTSUPP\fR]
The compression method used is not supported.
.TP 19n
[\fRZIP_ER_ENCRNOTSUPP\fR]
The encryption method used is not supported.
.TP 19n
[\fRZIP_ER_MEMORY\fR]
Required memory could not be allocated.
.TP 19n
[\fRZIP_ER_NOPASSWD\fR]
The file is encrypted, but no password has been provided.
.TP 19n
[\fRZIP_ER_READ\fR]
A file read error occurred.
.TP 19n
[\fRZIP_ER_SEEK\fR]
A file seek error occurred.
.TP 19n
[\fRZIP_ER_WRONGPASSWD\fR]
The provided password does not match the password used for encryption.
Note that some incorrect passwords are not detected by the check done by
\fBzip_fopen\fR().
.TP 19n
[\fRZIP_ER_ZLIB\fR]
Initializing the zlib stream failed.
.PP
The function
\fBzip_fopen\fR()
may also fail and set
\fIzip_err\fR
for any of the errors specified for the routine
zip_name_locate(3).
.PP
The function
\fBzip_fopen_index\fR()
may also fail with
\fRZIP_ER_INVAL\fR
if
\fIindex\fR
is invalid.
.SH "SEE ALSO"
libzip(3),
zip_fclose(3),
zip_fread(3),
zip_fseek(3),
zip_get_num_entries(3),
zip_name_locate(3),
zip_set_default_password(3)
.SH "HISTORY"
\fBzip_fopen\fR()
and
\fBzip_fopen_index\fR()
were added in libzip 1.0.
.SH "AUTHORS"
Dieter Baron <\fIdillo@nih.at\fR>
and
Thomas Klausner <\fItk@giga.or.at\fR>