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.\" zip_open.mdoc -- open zip archive
.\" Copyright (C) 2003-2022 Dieter Baron and Thomas Klausner
.\"
.\" This file is part of libzip, a library to manipulate ZIP archives.
.\" The authors can be contacted at <info@libzip.org>
.\"
.\" 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.
.\"
.Dd May 5, 2025
.Dt ZIP_OPEN 3
.Os
.Sh NAME
.Nm zip_open ,
.Nm zip_open_from_source
.Nd open zip archive
.Sh LIBRARY
libzip (-lzip)
.Sh SYNOPSIS
.In zip.h
.Ft zip_t *
.Fn zip_open "const char *path" "int flags" "int *errorp"
.Ft zip_t *
.Fn zip_open_from_source "zip_source_t *zs" "int flags" "zip_error_t *ze"
.Sh DESCRIPTION
The
.Fn zip_open
function opens the zip archive specified by
.Ar path
and returns a pointer to a
.Ft struct zip ,
used to manipulate the archive.
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_CHECKCONS
Perform additional stricter consistency checks on the archive, and
error if they fail.
.It Dv ZIP_CREATE
Create the archive if it does not exist.
.It Dv ZIP_EXCL
Error if archive already exists.
.It Dv ZIP_TRUNCATE
If archive exists, ignore its current contents.
In other words, handle it the same way as an empty archive.
.It Dv ZIP_RDONLY
Open archive in read-only mode.
.El
.Pp
If an error occurs and
.Ar errorp
is
.Pf non- Dv NULL ,
it will be set to the corresponding error code.
.Pp
The
.Fn zip_open_from_source
function opens a zip archive encapsulated by the zip_source
.Fa zs
using the provided
.Fa flags .
In case of error, the zip_error
.Fa ze
is filled in.
.Sh RETURN VALUES
Upon successful completion
.Fn zip_open
and
.Fn zip_open_from_source
return a
.Ft struct zip
pointer.
Otherwise,
.Dv NULL
is returned and
.Fn zip_open
sets
.Ar *errorp
to indicate the error, while
.Fn zip_open_from source
sets
.Ar ze
to indicate the error.
.Sh EXAMPLES
Here's an example of how you could report errors during
.Nm :
.Bd -literal
zip_t *za;
int err;
if ((za = zip_open(name, 0, &err)) == NULL) {
zip_error_t error;
zip_error_init_with_code(&error, err);
fprintf(stderr, "%s: cannot open zip archive '%s': %s\en",
progname, name, zip_error_strerror(&error));
zip_error_fini(&error);
return -1;
}
.Ed
.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 .
This error is often caused by specifying
.Dv ZIP_CHECKCONS
but can also happen without it.
.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
For newly created archives,
.Fn zip_open
does not try to create the file; this is done when calling
.Xr zip_close 3
and any errors, like missing write permissions, will
be reported then.
.Sh SEE ALSO
.Xr libzip 3 ,
.Xr zip_close 3 ,
.Xr zip_error_strerror 3 ,
.Xr zip_fdopen 3 ,
.Xr zip_source 5
.Sh HISTORY
.Fn zip_open
and
.Fn zip_open_from_source
were added in libzip 1.0.
.Sh AUTHORS
.An -nosplit
.An Dieter Baron Aq Mt dillo@nih.at
and
.An Thomas Klausner Aq Mt wiz@gatalith.at
|
