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| zip_file_extra_field_get.mdoc -- get extra field for file in zip |
| Copyright (C) 2012-2017 Dieter Baron and Thomas Klausner |
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| This file is part of libzip, a library to manipulate ZIP files. |
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| <title>ZIP_FILE_EXTRA_FIELD_GET(3)</title> |
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| <body> |
| <table class="head"> |
| <tr> |
| <td class="head-ltitle">ZIP_FILE_EXTRA_FIELD_GET(3)</td> |
| <td class="head-vol">Library Functions Manual</td> |
| <td class="head-rtitle">ZIP_FILE_EXTRA_FIELD_GET(3)</td> |
| </tr> |
| </table> |
| <div class="manual-text"> |
| <h1 class="Sh" title="Sh" id="NAME"><a class="selflink" href="#NAME">NAME</a></h1> |
| <b class="Nm" title="Nm">zip_file_extra_field_get</b>, |
| <b class="Nm" title="Nm">zip_file_extra_field_get_by_id</b> — |
| <span class="Nd" title="Nd">get extra field for file in zip</span> |
| <h1 class="Sh" title="Sh" id="LIBRARY"><a class="selflink" href="#LIBRARY">LIBRARY</a></h1> |
| libzip (-lzip) |
| <h1 class="Sh" title="Sh" id="SYNOPSIS"><a class="selflink" href="#SYNOPSIS">SYNOPSIS</a></h1> |
| <b class="In" title="In">#include <<a class="In" title="In">zip.h</a>></b> |
| <div class="Pp"></div> |
| <var class="Ft" title="Ft">const zip_uint8_t *</var> |
| <br/> |
| <b class="Fn" title="Fn">zip_file_extra_field_get</b>(<var class="Fa" title="Fa" style="white-space: nowrap;">zip_t |
| *archive</var>, |
| <var class="Fa" title="Fa" style="white-space: nowrap;">zip_uint64_t |
| index</var>, |
| <var class="Fa" title="Fa" style="white-space: nowrap;">zip_uint16_t |
| extra_field_index</var>, |
| <var class="Fa" title="Fa" style="white-space: nowrap;">zip_uint16_t |
| *idp</var>, |
| <var class="Fa" title="Fa" style="white-space: nowrap;">zip_uint16_t |
| *lenp</var>, |
| <var class="Fa" title="Fa" style="white-space: nowrap;">zip_flags_t |
| flags</var>); |
| <div class="Pp"></div> |
| <var class="Ft" title="Ft">const zip_uint8_t *</var> |
| <br/> |
| <b class="Fn" title="Fn">zip_file_extra_field_get_by_id</b>(<var class="Fa" title="Fa" style="white-space: nowrap;">zip_t |
| *archive</var>, |
| <var class="Fa" title="Fa" style="white-space: nowrap;">zip_uint64_t |
| index</var>, |
| <var class="Fa" title="Fa" style="white-space: nowrap;">zip_uint16_t |
| extra_field_id</var>, |
| <var class="Fa" title="Fa" style="white-space: nowrap;">zip_uint16_t |
| extra_field_index</var>, |
| <var class="Fa" title="Fa" style="white-space: nowrap;">zip_uint16_t |
| *lenp</var>, |
| <var class="Fa" title="Fa" style="white-space: nowrap;">zip_flags_t |
| flags</var>); |
| <h1 class="Sh" title="Sh" id="DESCRIPTION"><a class="selflink" href="#DESCRIPTION">DESCRIPTION</a></h1> |
| The <b class="Fn" title="Fn">zip_file_extra_field_get</b>() function returns the |
| extra field with index <var class="Ar" title="Ar">extra_field_index</var> for |
| the file at position <var class="Ar" title="Ar">index</var> in the zip |
| archive. This pointer should not be modified or |
| <a class="Xr" title="Xr" href="free.html">free(3)</a>'d, and becomes invalid |
| when <var class="Ar" title="Ar">archive</var> is closed. If |
| <var class="Ar" title="Ar">idp</var> is not |
| <code class="Dv" title="Dv">NULL</code>, the integer to which it points will |
| be set to the ID (two-byte signature) of the selected extra field. If |
| <var class="Ar" title="Ar">lenp</var> is not |
| <code class="Dv" title="Dv">NULL</code>, the integer to which it points will |
| be set to the length of the extra field. Generally speaking, |
| <var class="Ar" title="Ar">lenp</var> and <var class="Ar" title="Ar">idp</var> |
| should be passed since only the extra field data is returned (i.e., neither |
| the ID nor the length, if the <var class="Ar" title="Ar">idp</var> and |
| <var class="Ar" title="Ar">lenp</var> arguments are not provided). |
| <div class="Pp"></div> |
| The following <var class="Ar" title="Ar">flags</var> are supported: |
| <div class="Bl-tag" style="margin-left: 6.00ex;"> |
| <dl class="Bl-tag" style="margin-left: 24.60ex;"> |
| <dt class="It-tag" style="margin-left: -24.60ex;"> </dt> |
| <dd class="It-tag"> </dd> |
| <dt class="It-tag" style="margin-left: -24.60ex;"><a class="selflink" href="#ZIP_FL_CENTRAL"><code class="Dv" title="Dv" id="ZIP_FL_CENTRAL">ZIP_FL_CENTRAL</code></a></dt> |
| <dd class="It-tag">Return extra fields from the archive's central |
| directory.</dd> |
| <dt class="It-tag" style="margin-left: -24.60ex;"> </dt> |
| <dd class="It-tag"> </dd> |
| <dt class="It-tag" style="margin-left: -24.60ex;"><a class="selflink" href="#ZIP_FL_LOCAL"><code class="Dv" title="Dv" id="ZIP_FL_LOCAL">ZIP_FL_LOCAL</code></a></dt> |
| <dd class="It-tag">Return extra fields from the local file headers.</dd> |
| <dt class="It-tag" style="margin-left: -24.60ex;"> </dt> |
| <dd class="It-tag"> </dd> |
| <dt class="It-tag" style="margin-left: -24.60ex;"><a class="selflink" href="#ZIP_FL_UNCHANGED"><code class="Dv" title="Dv" id="ZIP_FL_UNCHANGED">ZIP_FL_UNCHANGED</code></a></dt> |
| <dd class="It-tag">Return the original unchanged extra fields, ignoring any |
| changes made.</dd> |
| </dl> |
| </div> |
| <div class="Pp"></div> |
| The <b class="Fn" title="Fn">zip_file_extra_field_get_by_id</b>() function |
| returns the extra field with ID (two-byte signature) |
| <var class="Ar" title="Ar">extra_field_id</var> and index |
| <var class="Ar" title="Ar">extra_field_index</var> (in other words, the |
| <var class="Ar" title="Ar">extra_field_index</var><span class="No">'th</span> |
| extra field with ID <var class="Ar" title="Ar">extra_field_id</var>) The other |
| arguments are the same as for |
| <b class="Fn" title="Fn">zip_file_extra_field_get</b>(). |
| <h1 class="Sh" title="Sh" id="RETURN_VALUES"><a class="selflink" href="#RETURN_VALUES">RETURN |
| VALUES</a></h1> |
| Upon successful completion, a pointer to an extra field is returned, or |
| <code class="Dv" title="Dv">NULL</code> if there is no extra field with that |
| <var class="Ar" title="Ar">extra_field_index</var> for the file with index |
| <var class="Ar" title="Ar">index</var>. In case of an error, |
| <code class="Dv" title="Dv">NULL</code> is returned and the error code in |
| <var class="Ar" title="Ar">archive</var> is set to indicate the error. |
| <h1 class="Sh" title="Sh" id="ERRORS"><a class="selflink" href="#ERRORS">ERRORS</a></h1> |
| <b class="Fn" title="Fn">zip_file_extra_field_get</b>() and |
| <b class="Fn" title="Fn">zip_file_extra_field_get_by_id</b>() fail if: |
| <dl class="Bl-tag" style="margin-left: 23.40ex;"> |
| <dt class="It-tag" style="margin-left: -23.40ex;"> </dt> |
| <dd class="It-tag"> </dd> |
| <dt class="It-tag" style="margin-left: -23.40ex;">[<a class="selflink" href="#ZIP_ER_NOENT"><code class="Er" title="Er" id="ZIP_ER_NOENT">ZIP_ER_NOENT</code></a>]</dt> |
| <dd class="It-tag"><var class="Ar" title="Ar">index</var> is not a valid file |
| index in <var class="Ar" title="Ar">archive</var>, or |
| <var class="Ar" title="Ar">extra_field_index</var> is not a valid extra |
| file index (for ID <var class="Ar" title="Ar">extra_field_id</var>).</dd> |
| </dl> |
| <h1 class="Sh" title="Sh" id="SEE_ALSO"><a class="selflink" href="#SEE_ALSO">SEE |
| ALSO</a></h1> |
| <a class="Xr" title="Xr" href="libzip.html">libzip(3)</a>, |
| <a class="Xr" title="Xr" href="zip_file_extra_field_delete.html">zip_file_extra_field_delete(3)</a>, |
| <a class="Xr" title="Xr" href="zip_file_extra_field_set.html">zip_file_extra_field_set(3)</a>, |
| <a class="Xr" title="Xr" href="zip_file_extra_fields_count.html">zip_file_extra_fields_count(3)</a> |
| <h1 class="Sh" title="Sh" id="HISTORY"><a class="selflink" href="#HISTORY">HISTORY</a></h1> |
| <b class="Fn" title="Fn">zip_file_extra_field_get</b>() and |
| <b class="Fn" title="Fn">zip_file_extra_field_get_by_id</b>() were added in |
| libzip 0.11. |
| <h1 class="Sh" title="Sh" id="AUTHORS"><a class="selflink" href="#AUTHORS">AUTHORS</a></h1> |
| <span class="An" title="An">Dieter Baron</span> |
| <<a class="Mt" title="Mt" href="mailto:dillo@nih.at">dillo@nih.at</a>> |
| and <span class="An" title="An">Thomas Klausner</span> |
| <<a class="Mt" title="Mt" href="mailto:tk@giga.or.at">tk@giga.or.at</a>> |
| <h1 class="Sh" title="Sh" id="CAVEATS"><a class="selflink" href="#CAVEATS">CAVEATS</a></h1> |
| Please note that the extra field IDs 0x0001 (ZIP64 extension), 0x6375 (Infozip |
| UTF-8 comment), and 0x7075 (Infozip UTF-8 file name) can not be read using |
| <b class="Fn" title="Fn">zip_file_extra_field_get</b>() since they are used by |
| <a class="Xr" title="Xr" href="libzip.html">libzip(3)</a> internally.</div> |
| <table class="foot"> |
| <tr> |
| <td class="foot-date">December 18, 2017</td> |
| <td class="foot-os">NetBSD 8.99.14</td> |
| </tr> |
| </table> |
| </body> |
| </html> |