.\" $NiH: zip_open.mdoc,v 1.21 2005/06/09 21:13:12 wiz Exp $
.\"
.\" zip_open.mdoc -- open zip archive
.\" Copyright (C) 2003, 2005 Dieter Baron and Thomas Klausner
.\"
.\" This file is part of libzip, a library to manipulate ZIP archives.
.\" The authors can be contacted at <nih@giga.or.at>
.\"
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.\" modification, are permitted provided that the following conditions
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.Dd December 27, 2003
.Dt ZIP_OPEN 3
.Os
.Sh NAME
.Nm zip_open
.Nd open zip archive
.Sh LIBRARY
libzip (-lzip)
.Sh SYNOPSIS
.In zip.h
.Ft struct zip *
.Fn zip_open "const char *path" "int flags" "int *errorp"
.Sh DESCRIPTION
The zip archive specified by
.Ar path
is opened and a pointer to a
.Ft struct zip ,
used to manipulate the archive, is returned.
The
.Fa flags
are specified by
.Em or Ns No 'ing
the following values, or 0 for none of them.
.Bl -tag -offset indent -width ZIP_CHECKCONS
.It Dv ZIP_CREATE
Create the archive if it does not exist.
.It Dv ZIP_EXCL
Error if archive already exists.
.It Dv ZIP_CHECKCONS
Perform additional consistency checks on the archive, and error if
they fail.
.El
.Pp
If an error occurs and
.Ar errorp
is non-NULL, it will be set to the corresponding error code.
.Sh RETURN VALUES
Upon successful completion
.Fn zip_open
returns a
.Ft struct zip
pointer.
Otherwise,
.Dv NULL
is returned and
.Ar *errorp
is set to indicate the error.
.Sh ERRORS
The archive specified by
.Ar path
is opened unless:
.Bl -tag -width Er
.It Bq Er ZIP_ER_EXISTS
The file specified by
.Ar path
exists and
.Dv ZIP_EXCL
is set.
.It Bq Er ZIP_ER_INCONS
Inconsistencies were found in the file specified by
.Ar path
and
.Dv ZIP_CHECKCONS
was specified.
.It Bq Er ZIP_ER_INVAL
The
.Ar path
argument is
.Dv NULL .
.It Bq Er ZIP_ER_MEMORY
Required memory could not be allocated.
.It Bq Er ZIP_ER_NOENT
The file specified by
.Ar path
does not exist and
.Dv ZIP_CREATE
is not set.
.It Bq Er ZIP_ER_NOZIP
The file specified by
.Ar path
is not a zip archive.
.It Bq Er ZIP_ER_OPEN
The file specified by
.Ar path
could not be opened.
.It Bq Er ZIP_ER_READ
A read error occurred; see
.Va errno
for details.
.It Bq Er ZIP_ER_SEEK
The file specified by
.Ar path
does not allow seeks.
.El
.Sh SEE ALSO
.Xr libzip 3 ,
.Xr zip_close 3 ,
.Xr zip_error_to_str 3
.Sh AUTHORS
.An -nosplit
.An Dieter Baron Aq dillo@giga.or.at
and
.An Thomas Klausner Aq tk@giga.or.at