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<table class="head">
<tr>
<td class="head-ltitle">LIBZIP(3)</td>
<td class="head-vol">Library Functions Manual</td>
<td class="head-rtitle">LIBZIP(3)</td>
</tr>
</table>
<div class="manual-text">
<section class="Sh">
<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
<p class="Pp"><code class="Nm">libzip</code> — <span class="Nd">library
for manipulating zip archives</span></p>
</section>
<section class="Sh">
<h1 class="Sh" id="LIBRARY"><a class="permalink" href="#LIBRARY">LIBRARY</a></h1>
<p class="Pp">libzip (-lzip)</p>
</section>
<section class="Sh">
<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
<p class="Pp"><code class="In">#include
<<a class="In">zip.h</a>></code></p>
</section>
<section class="Sh">
<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
<p class="Pp"><code class="Nm">libzip</code> is a library for reading, creating,
and modifying zip archives.</p>
<p class="Pp">The main design criteria for <code class="Nm">libzip</code>
were:</p>
<ul class="Bl-bullet Bl-compact">
<li>Maintain a stable API without breaking backwards compatibility.</li>
<li>Do not create corrupt files, even in case of errors.</li>
<li>Do not delete data.</li>
<li>Be efficient.</li>
</ul>
<p class="Pp">For this reason, when modifying zip archives,
<code class="Nm">libzip</code> writes to a temporary file and replaces the
original zip archive atomically.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="GENERAL_NOTES"><a class="permalink" href="#GENERAL_NOTES">GENERAL
NOTES</a></h1>
<p class="Pp">When adding files to an archive, the file data is only read when
the new archive is written. Therefore all files added must remain valid
until the archive is closed with
<a class="Xr" href="zip_close.html">zip_close(3)</a> or
<a class="Xr" href="zip_discard.html">zip_discard(3)</a>.</p>
<p class="Pp">Unless explicitly documented, functions should not be passed
<code class="Dv">NULL</code> pointers as arguments.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="DATA_TYPES"><a class="permalink" href="#DATA_TYPES">DATA
TYPES</a></h1>
<p class="Pp">These data types correspond to central concepts in
<code class="Nm">libzip</code>. Most of them are private, meaning you can't
allocate them or access their members directly. This allows extending the
structures in the future without breaking compatibility.</p>
<section class="Ss">
<h2 class="Ss" id="zip_t"><a class="permalink" href="#zip_t">zip_t</a></h2>
<p class="Pp">This type represents an opened archive. See
<a class="Xr" href="zip.html">zip(5)</a>.</p>
</section>
<section class="Ss">
<h2 class="Ss" id="zip_file_t"><a class="permalink" href="#zip_file_t">zip_file_t</a></h2>
<p class="Pp">This type represents a file from an archive that has been opened
for reading. See <a class="Xr" href="zip_file.html">zip_file(5)</a>.</p>
</section>
<section class="Ss">
<h2 class="Ss" id="zip_source_t"><a class="permalink" href="#zip_source_t">zip_source_t</a></h2>
<p class="Pp">This type represents a source (or destination) of data. It is used
in <code class="Nm">libzip</code> for providing data when adding or
replacing files, accessing data from a file inside an archive, and the data
for the archive as a whole. See
<a class="Xr" href="zip_source.html">zip_source(5)</a>.</p>
</section>
<section class="Ss">
<h2 class="Ss" id="zip_error_t"><a class="permalink" href="#zip_error_t">zip_error_t</a></h2>
<p class="Pp">This type represents information about an error. Its type can be
checked against pre-defined constants and it can be converted to a human
readable string. See
<a class="Xr" href="zip_error.html">zip_error(5)</a>.</p>
</section>
</section>
<section class="Sh">
<h1 class="Sh" id="FILE_NAMES"><a class="permalink" href="#FILE_NAMES">FILE
NAMES</a></h1>
<section class="Ss">
<h2 class="Ss" id="Encoding"><a class="permalink" href="#Encoding">Encoding</a></h2>
<p class="Pp">Names of files in the host file system are expected in UTF-8
encoding. On Windows, variants for ASCII and UTF-16 are also available.</p>
<p class="Pp">Names of files inside archives are by default expected in UTF-8
encoding. Other encodings can be requested by using the flags
<code class="Dv">ZIP_FL_ENC_CP437</code> and
<code class="Dv">ZIP_FL_ENC_RAW</code>.</p>
<p class="Pp">For details see the relevant man pages.</p>
</section>
<section class="Ss">
<h2 class="Ss" id="Directory_Separator"><a class="permalink" href="#Directory_Separator">Directory
Separator</a></h2>
<p class="Pp">The zip format requires the use of forward slash
(‘/’) as directory separator. Since backslash
(‘\’) can be part of a valid file name on Unix systems,
<code class="Nm">libzip</code> does not automatically convert them, even on
Windows. It is the responsibility of the programmer to ensure that all
directory separators are passed as forward slashes to
<code class="Nm">libzip</code>.</p>
</section>
</section>
<section class="Sh">
<h1 class="Sh" id="THREAD_SAFETY"><a class="permalink" href="#THREAD_SAFETY">THREAD
SAFETY</a></h1>
<p class="Pp">In general, different zip archives opened by
<code class="Nm">libzip</code> are independent of each other and can be used
by parallel-running threads without locking. If you want to use an archive
from multiple threads, you have to synchronize access to it yourself. If you
use an archive as a source for
<a class="Xr" href="zip_file_add.html">zip_file_add(3)</a> or
<a class="Xr" href="zip_file_replace.html">zip_file_replace(3)</a>, access
to the target archive must be synchronized with access to the source archive
as well.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="READING_ZIP_ARCHIVES"><a class="permalink" href="#READING_ZIP_ARCHIVES">READING
ZIP ARCHIVES</a></h1>
<section class="Ss">
<h2 class="Ss" id="Open_Archive"><a class="permalink" href="#Open_Archive">Open
Archive</a></h2>
<ul class="Bl-bullet Bl-compact">
<li><a class="Xr" href="zip_open.html">zip_open(3)</a></li>
<li><a class="Xr" href="zip_open_from_source.html">zip_open_from_source(3)</a></li>
<li><a class="Xr" href="zip_fdopen.html">zip_fdopen(3)</a></li>
</ul>
</section>
<section class="Ss">
<h2 class="Ss" id="Get_Archive_Attributes"><a class="permalink" href="#Get_Archive_Attributes">Get
Archive Attributes</a></h2>
<ul class="Bl-bullet Bl-compact">
<li><a class="Xr" href="zip_get_archive_comment.html">zip_get_archive_comment(3)</a></li>
<li><a class="Xr" href="zip_get_archive_flag.html">zip_get_archive_flag(3)</a></li>
<li><a class="Xr" href="zip_get_num_entries.html">zip_get_num_entries(3)</a></li>
</ul>
</section>
<section class="Ss">
<h2 class="Ss" id="Find_Files"><a class="permalink" href="#Find_Files">Find
Files</a></h2>
<ul class="Bl-bullet Bl-compact">
<li><a class="Xr" href="zip_name_locate.html">zip_name_locate(3)</a></li>
</ul>
</section>
<section class="Ss">
<h2 class="Ss" id="Read_Files"><a class="permalink" href="#Read_Files">Read
Files</a></h2>
<ul class="Bl-bullet Bl-compact">
<li><a class="Xr" href="zip_fopen.html">zip_fopen(3)</a></li>
<li><a class="Xr" href="zip_fopen_encrypted.html">zip_fopen_encrypted(3)</a></li>
<li><a class="Xr" href="zip_fopen_index.html">zip_fopen_index(3)</a></li>
<li><a class="Xr" href="zip_fopen_index_encrypted.html">zip_fopen_index_encrypted(3)</a></li>
<li><a class="Xr" href="zip_fread.html">zip_fread(3)</a></li>
<li><a class="Xr" href="zip_file_is_seekable.html">zip_file_is_seekable(3)</a></li>
<li><a class="Xr" href="zip_fseek.html">zip_fseek(3)</a> (uncompressed files
only)</li>
<li><a class="Xr" href="zip_ftell.html">zip_ftell(3)</a></li>
<li><a class="Xr" href="zip_fclose.html">zip_fclose(3)</a></li>
</ul>
</section>
<section class="Ss">
<h2 class="Ss" id="Close_Archive"><a class="permalink" href="#Close_Archive">Close
Archive</a></h2>
<ul class="Bl-bullet Bl-compact">
<li><a class="Xr" href="zip_close.html">zip_close(3)</a></li>
</ul>
</section>
<section class="Ss">
<h2 class="Ss" id="Get_File_Attributes"><a class="permalink" href="#Get_File_Attributes">Get
File Attributes</a></h2>
<ul class="Bl-bullet Bl-compact">
<li><a class="Xr" href="zip_stat.html">zip_stat(3)</a></li>
<li><a class="Xr" href="zip_file_get_comment.html">zip_file_get_comment(3)</a></li>
<li><a class="Xr" href="zip_file_get_external_attributes.html">zip_file_get_external_attributes(3)</a></li>
<li><a class="Xr" href="zip_get_name.html">zip_get_name(3)</a></li>
</ul>
</section>
<section class="Ss">
<h2 class="Ss" id="Miscellaneous"><a class="permalink" href="#Miscellaneous">Miscellaneous</a></h2>
<ul class="Bl-bullet Bl-compact">
<li><a class="Xr" href="zip_compression_method_supported.html">zip_compression_method_supported(3)</a></li>
<li><a class="Xr" href="zip_encryption_method_supported.html">zip_encryption_method_supported(3)</a></li>
<li><a class="Xr" href="zip_set_default_password.html">zip_set_default_password(3)</a></li>
</ul>
</section>
</section>
<section class="Sh">
<h1 class="Sh" id="CREATING/MODIFYING_ZIP_ARCHIVES"><a class="permalink" href="#CREATING/MODIFYING_ZIP_ARCHIVES">CREATING/MODIFYING
ZIP ARCHIVES</a></h1>
<section class="Ss">
<h2 class="Ss" id="Create/Open_Archive"><a class="permalink" href="#Create/Open_Archive">Create/Open
Archive</a></h2>
<ul class="Bl-bullet Bl-compact">
<li><a class="Xr" href="zip_open.html">zip_open(3)</a></li>
</ul>
</section>
<section class="Ss">
<h2 class="Ss" id="Add/Change_Files_and_Directories"><a class="permalink" href="#Add/Change_Files_and_Directories">Add/Change
Files and Directories</a></h2>
<ul class="Bl-bullet Bl-compact">
<li><a class="Xr" href="zip_dir_add.html">zip_dir_add(3)</a></li>
<li><a class="Xr" href="zip_file_add.html">zip_file_add(3)</a></li>
<li><a class="Xr" href="zip_file_replace.html">zip_file_replace(3)</a></li>
<li><a class="Xr" href="zip_file_set_comment.html">zip_file_set_comment(3)</a></li>
<li><a class="Xr" href="zip_file_set_dostime.html">zip_file_set_dostime(3)</a></li>
<li><a class="Xr" href="zip_file_set_external_attributes.html">zip_file_set_external_attributes(3)</a></li>
<li><a class="Xr" href="zip_file_set_encryption.html">zip_file_set_encryption(3)</a></li>
<li><a class="Xr" href="zip_file_set_mtime.html">zip_file_set_mtime(3)</a></li>
<li><a class="Xr" href="zip_set_file_compression.html">zip_set_file_compression(3)</a></li>
<li><a class="Xr" href="zip_source_buffer.html">zip_source_buffer(3)</a></li>
<li><a class="Xr" href="zip_source_file.html">zip_source_file(3)</a></li>
<li><a class="Xr" href="zip_source_filep.html">zip_source_filep(3)</a></li>
<li><a class="Xr" href="zip_source_zip.html">zip_source_zip(3)</a></li>
</ul>
</section>
<section class="Ss">
<h2 class="Ss" id="Rename_Files"><a class="permalink" href="#Rename_Files">Rename
Files</a></h2>
<ul class="Bl-bullet Bl-compact">
<li><a class="Xr" href="zip_rename.html">zip_rename(3)</a></li>
</ul>
</section>
<section class="Ss">
<h2 class="Ss" id="Delete_Files"><a class="permalink" href="#Delete_Files">Delete
Files</a></h2>
<ul class="Bl-bullet Bl-compact">
<li><a class="Xr" href="zip_delete.html">zip_delete(3)</a></li>
</ul>
</section>
<section class="Ss">
<h2 class="Ss" id="Revert_Changes"><a class="permalink" href="#Revert_Changes">Revert
Changes</a></h2>
<ul class="Bl-bullet Bl-compact">
<li><a class="Xr" href="zip_unchange.html">zip_unchange(3)</a></li>
<li><a class="Xr" href="zip_unchange_all.html">zip_unchange_all(3)</a></li>
<li><a class="Xr" href="zip_unchange_archive.html">zip_unchange_archive(3)</a></li>
</ul>
</section>
<section class="Ss">
<h2 class="Ss" id="Read/Modify_Extra_Fields"><a class="permalink" href="#Read/Modify_Extra_Fields">Read/Modify
Extra Fields</a></h2>
<ul class="Bl-bullet Bl-compact">
<li><a class="Xr" href="zip_file_extra_field_delete.html">zip_file_extra_field_delete(3)</a></li>
<li><a class="Xr" href="zip_file_extra_field_delete_by_id.html">zip_file_extra_field_delete_by_id(3)</a></li>
<li><a class="Xr" href="zip_file_extra_field_get.html">zip_file_extra_field_get(3)</a></li>
<li><a class="Xr" href="zip_file_extra_field_get_by_id.html">zip_file_extra_field_get_by_id(3)</a></li>
<li><a class="Xr" href="zip_file_extra_field_set.html">zip_file_extra_field_set(3)</a></li>
<li><a class="Xr" href="zip_file_extra_fields_count.html">zip_file_extra_fields_count(3)</a></li>
<li><a class="Xr" href="zip_file_extra_fields_count_by_id.html">zip_file_extra_fields_count_by_id(3)</a></li>
</ul>
</section>
<section class="Ss">
<h2 class="Ss" id="Close_Archive_(Writing)"><a class="permalink" href="#Close_Archive_(Writing)">Close
Archive (Writing)</a></h2>
<ul class="Bl-bullet Bl-compact">
<li><a class="Xr" href="zip_close.html">zip_close(3)</a></li>
<li><a class="Xr" href="zip_discard.html">zip_discard(3)</a></li>
</ul>
</section>
<section class="Ss">
<h2 class="Ss" id="Miscellaneous_(Writing)"><a class="permalink" href="#Miscellaneous_(Writing)">Miscellaneous
(Writing)</a></h2>
<ul class="Bl-bullet Bl-compact">
<li><a class="Xr" href="zip_file_attributes_init.html">zip_file_attributes_init(3)</a></li>
<li><a class="Xr" href="zip_libzip_version.html">zip_libzip_version(3)</a></li>
<li><a class="Xr" href="zip_register_cancel_callback_with_state.html">zip_register_cancel_callback_with_state(3)</a></li>
<li><a class="Xr" href="zip_register_progress_callback_with_state.html">zip_register_progress_callback_with_state(3)</a></li>
<li><a class="Xr" href="zip_set_archive_comment.html">zip_set_archive_comment(3)</a></li>
<li><a class="Xr" href="zip_set_archive_flag.html">zip_set_archive_flag(3)</a></li>
<li><a class="Xr" href="zip_source.html">zip_source(5)</a></li>
</ul>
</section>
</section>
<section class="Sh">
<h1 class="Sh" id="SOURCES"><a class="permalink" href="#SOURCES">SOURCES</a></h1>
<section class="Ss">
<h2 class="Ss" id="Create_Source"><a class="permalink" href="#Create_Source">Create
Source</a></h2>
<ul class="Bl-bullet Bl-compact">
<li><a class="Xr" href="zip_source_buffer.html">zip_source_buffer(3)</a></li>
<li><a class="Xr" href="zip_source_file.html">zip_source_file(3)</a></li>
<li><a class="Xr" href="zip_source_filep.html">zip_source_filep(3)</a></li>
<li><a class="Xr" href="zip_source_function.html">zip_source_function(3)</a></li>
<li><a class="Xr" href="zip_source_layered.html">zip_source_layered(3)</a></li>
<li><a class="Xr" href="zip_source_zip.html">zip_source_zip(3)</a></li>
</ul>
</section>
<section class="Ss">
<h2 class="Ss" id="Using_Source"><a class="permalink" href="#Using_Source">Using
Source</a></h2>
<ul class="Bl-bullet Bl-compact">
<li><a class="Xr" href="zip_file_add.html">zip_file_add(3)</a></li>
<li><a class="Xr" href="zip_file_replace.html">zip_file_replace(3)</a></li>
<li><a class="Xr" href="zip_open_from_source.html">zip_open_from_source(3)</a></li>
</ul>
</section>
<section class="Ss">
<h2 class="Ss" id="Implementing_Source"><a class="permalink" href="#Implementing_Source">Implementing
Source</a></h2>
<ul class="Bl-bullet Bl-compact">
<li><a class="Xr" href="zip_source_pass_to_lower_layer.html">zip_source_pass_to_lower_layer(3)</a></li>
</ul>
</section>
<section class="Ss">
<h2 class="Ss" id="Source_Life_Cycle"><a class="permalink" href="#Source_Life_Cycle">Source
Life Cycle</a></h2>
<ul class="Bl-bullet Bl-compact">
<li><a class="Xr" href="zip_source_free.html">zip_source_free(3)</a></li>
<li><a class="Xr" href="zip_source_keep.html">zip_source_keep(3)</a></li>
</ul>
</section>
</section>
<section class="Sh">
<h1 class="Sh" id="ERROR_HANDLING"><a class="permalink" href="#ERROR_HANDLING">ERROR
HANDLING</a></h1>
<ul class="Bl-bullet Bl-compact">
<li><a class="Xr" href="zip_error_strerror.html">zip_error_strerror(3)</a></li>
<li><a class="Xr" href="zip_strerror.html">zip_strerror(3)</a></li>
<li><a class="Xr" href="zip_file_strerror.html">zip_file_strerror(3)</a></li>
<li><a class="Xr" href="zip_file_get_error.html">zip_file_get_error(3)</a></li>
<li><a class="Xr" href="zip_get_error.html">zip_get_error(3)</a></li>
<li><a class="Xr" href="zip_error_init_with_code.html">zip_error_init_with_code(3)</a></li>
<li><a class="Xr" href="zip_error_set.html">zip_error_set(3)</a></li>
<li><a class="Xr" href="zip_error_set_from_source.html">zip_error_set_from_source(3)</a></li>
<li><a class="Xr" href="zip_error_system_type.html">zip_error_system_type(3)</a></li>
<li><a class="Xr" href="zip_errors.html">zip_errors(3)</a></li>
</ul>
</section>
<section class="Sh">
<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1>
<p class="Pp"><span class="An">Dieter Baron</span>
<<a class="Mt" href="mailto:dillo@nih.at">dillo@nih.at</a>> and
<span class="An">Thomas Klausner</span>
<<a class="Mt" href="mailto:wiz@gatalith.at">wiz@gatalith.at</a>></p>
</section>
</div>
<table class="foot">
<tr>
<td class="foot-date">May 5, 2025</td>
<td class="foot-os">NiH</td>
</tr>
</table>
</body>
</html>