.\" zip_fdopen.mdoc \-- open zip archive using existing file descriptor
.\" Copyright (C) 2009-2012 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_FDOPEN 3 "February 13, 2012" NiH
.SH "NAME"
zip_fdopen \- open zip archive using open file descriptor
.SH "LIBRARY"
libzip (-lzip)
.SH "SYNOPSIS"
#include <zip.h>
.PP
struct zip *
zip_fdopen(int fd, int flags, int *errorp);
.SH "DESCRIPTION"
The zip archive specified by the open file descriptor
\fBfd\fR
is opened and a pointer to a
.PP
struct zip,
used to manipulate the archive, is returned.
In contrast to
zip_open(3),
using
.Nm zip_fdopen
the archive can only be opened in read-only mode.
The
\fBfd\fR
argument may not be used any longer after calling
.Nm zip_fdopen.
The
.Fa flags
are specified by
.I or'ing
the following values, or 0 for none of them.
.RS
.TP 15
\fBZIP_CHECKCONS\fR
Perform additional stricter consistency checks on the archive, and
error if they fail.
.RE
.PP
If an error occurs and
\fBerrorp\fR
is
.No non-\fBNULL,\fR
it will be set to the corresponding error code.
.SH "RETURN VALUES"
Upon successful completion
zip_fdopen
returns a
.PP
struct zip
pointer, and
\fBfd\fR
should not be used any longer, nor passed to
close(2).
Otherwise,
\fBNULL\fR
is returned and
\fB*errorp\fR
is set to indicate the error.
In the error case,
\fBfd\fR
remains unchanged.
.SH "ERRORS"
The file specified by
\fBfd\fR
is prepared for use by
libzip(3)
unless:
.RS
.TP 4
[ZIP_ER_INCONS]
Inconsistencies were found in the file specified by
\fBpath.\fR
This error is often caused by specifying
\fBZIP_CHECKCONS\fR
but can also happen without it.
.TP 4
[ZIP_ER_INVAL]
The
\fBflags\fR
argument is invalid.
Not all
zip_open(3)
flags are allowed for
.Nm zip_fdopen,
see
DESCRIPTION.
.TP 4
[ZIP_ER_MEMORY]
Required memory could not be allocated.
.TP 4
[ZIP_ER_NOZIP]
The file specified by
\fBfd\fR
is not a zip archive.
.TP 4
[ZIP_ER_OPEN]
The file specified by
\fBfd\fR
could not be prepared for use by
libzip(3).
.TP 4
[ZIP_ER_READ]
A read error occurred; see
.Va errno
for details.
.TP 4
[ZIP_ER_SEEK]
The file specified by
\fBfd\fR
does not allow seeks.
.RE
.SH "SEE ALSO"
libzip(3),
zip_close(3),
zip_error_to_str(3),
zip_open(3)
.SH "AUTHORS"

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