.\" zip_fopen.mdoc \-- open file in zip archive for reading
.\" Copyright (C) 2003-2011 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>
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.TH ZIP_FOPEN 3 "February 14, 2011" NiH
.SH "NAME"
zip_fopen , \- .Nm zip_fopen_index
open file in zip archive for reading
.SH "LIBRARY"
libzip (-lzip)
.SH "SYNOPSIS"
#include <zip.h>
.PP
struct zip_file *
zip_fopen(struct zip *archive, const char *fname, int flags);
.PP
struct zip_file *
zip_fopen_index(struct zip *archive, zip_uint64_t index, int flags);
.SH "DESCRIPTION"
The
zip_fopen
function opens the file name
\fBfname\fR
in
\fBarchive.\fR
The
\fBflags\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
.I or'ed
to it.
.RS
.TP 19
\fBZIP_FL_COMPRESSED\fR
Read the compressed data.
Otherwise the data is uncompressed by
zip_fread.
.TP 19
\fBZIP_FL_UNCHANGED\fR
Read the original data from the zip archive, ignoring any changes made
to the file.
.RE
.PP
The
zip_fopen_index
function opens the file at position
\fBindex.\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
.PP
struct zip_file
pointer is returned.
Otherwise,
\fBNULL\fR
is returned and the error code in
\fBarchive\fR
is set to indicate the error.
.SH "ERRORS"
.RS
.TP 4
[ZIP_ER_CHANGED]
The file data has been changed.
.TP 4
[ZIP_ER_COMPNOTSUPP]
The compression method used is not supported.
.TP 4
[ZIP_ER_ENCRNOTSUPP]
The encryption method used is not supported.
.TP 4
[ZIP_ER_MEMORY]
Required memory could not be allocated.
.TP 4
[ZIP_ER_READ]
A file read error occurred.
.TP 4
[ZIP_ER_SEEK]
A file seek error occurred.
.TP 4
[ZIP_ER_ZLIB]
Initializing the zlib stream failed.
.RE
.PP
The function
zip_fopen
may also fail and set
.Va zip_err
for any of the errors specified for the routine
zip_name_locate(3).
.PP
The function
zip_fopen_index
may also fail with
ZIP_ER_INVAL
if
\fBindex\fR
is invalid.
.SH "SEE ALSO"
libzip(3),
zip_fclose(3),
zip_fread(3),
zip_get_num_entries(3),
zip_name_locate(3),
zip_set_default_password(3)
.SH "AUTHORS"

Dieter Baron <dillo@giga.or.at>
and
Thomas Klausner <tk@giga.or.at>