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<p>ARCHIVE_READ_FORMAT(3) BSD Library Functions Manual
ARCHIVE_READ_FORMAT(3)</p>
<p style="margin-top: 1em"><b>NAME</b></p>
<p style="margin-left:6%;"><b>archive_read_support_format_7zip</b>,
<b>archive_read_support_format_all</b>,
<b>archive_read_support_format_ar</b>,
<b>archive_read_support_format_by_code</b>,
<b>archive_read_support_format_cab</b>,
<b>archive_read_support_format_cpio</b>,
<b>archive_read_support_format_empty</b>,
<b>archive_read_support_format_iso9660</b>,
<b>archive_read_support_format_lha</b>,
<b>archive_read_support_format_mtree</b>,
<b>archive_read_support_format_rar</b>,
<b>archive_read_support_format_raw</b>,
<b>archive_read_support_format_tar</b>,
<b>archive_read_support_format_xar</b>,
<b>archive_read_support_format_zip</b> — functions for
reading streaming archives</p>
<p style="margin-top: 1em"><b>LIBRARY</b></p>
<p style="margin-left:6%;">Streaming Archive Library
(libarchive, -larchive)</p>
<p style="margin-top: 1em"><b>SYNOPSIS</b></p>
<p style="margin-left:6%;"><b>#include
<archive.h></b></p>
<p style="margin-left:6%; margin-top: 1em"><i>int</i></p>
<p style="margin-left:12%;"><b>archive_read_support_format_7zip</b>(<i>struct archive *</i>);</p>
<p style="margin-left:6%; margin-top: 1em"><i>int</i></p>
<p style="margin-left:12%;"><b>archive_read_support_format_all</b>(<i>struct archive *</i>);</p>
<p style="margin-left:6%; margin-top: 1em"><i>int</i></p>
<p style="margin-left:12%;"><b>archive_read_support_format_ar</b>(<i>struct archive *</i>);</p>
<p style="margin-left:6%; margin-top: 1em"><i>int</i></p>
<p style="margin-left:12%;"><b>archive_read_support_format_by_code</b>(<i>struct archive *</i>,
<i>int</i>);</p>
<p style="margin-left:6%; margin-top: 1em"><i>int</i></p>
<p style="margin-left:12%;"><b>archive_read_support_format_cab</b>(<i>struct archive *</i>);</p>
<p style="margin-left:6%; margin-top: 1em"><i>int</i></p>
<p style="margin-left:12%;"><b>archive_read_support_format_cpio</b>(<i>struct archive *</i>);</p>
<p style="margin-left:6%; margin-top: 1em"><i>int</i></p>
<p style="margin-left:12%;"><b>archive_read_support_format_empty</b>(<i>struct archive *</i>);</p>
<p style="margin-left:6%; margin-top: 1em"><i>int</i></p>
<p style="margin-left:12%;"><b>archive_read_support_format_iso9660</b>(<i>struct archive *</i>);</p>
<p style="margin-left:6%; margin-top: 1em"><i>int</i></p>
<p style="margin-left:12%;"><b>archive_read_support_format_lha</b>(<i>struct archive *</i>);</p>
<p style="margin-left:6%; margin-top: 1em"><i>int</i></p>
<p style="margin-left:12%;"><b>archive_read_support_format_mtree</b>(<i>struct archive *</i>);</p>
<p style="margin-left:6%; margin-top: 1em"><i>int</i></p>
<p style="margin-left:12%;"><b>archive_read_support_format_rar</b>(<i>struct archive *</i>);</p>
<p style="margin-left:6%; margin-top: 1em"><i>int</i></p>
<p style="margin-left:12%;"><b>archive_read_support_format_raw</b>(<i>struct archive *</i>);</p>
<p style="margin-left:6%; margin-top: 1em"><i>int</i></p>
<p style="margin-left:12%;"><b>archive_read_support_format_tar</b>(<i>struct archive *</i>);</p>
<p style="margin-left:6%; margin-top: 1em"><i>int</i></p>
<p style="margin-left:12%;"><b>archive_read_support_format_xar</b>(<i>struct archive *</i>);</p>
<p style="margin-left:6%; margin-top: 1em"><i>int</i></p>
<p style="margin-left:12%;"><b>archive_read_support_format_zip</b>(<i>struct archive *</i>);</p>
<p style="margin-top: 1em"><b>DESCRIPTION <br>
archive_read_support_format_7zip</b>(),
<b>archive_read_support_format_ar</b>(),
<b>archive_read_support_format_cab</b>(),
<b>archive_read_support_format_cpio</b>(),
<b>archive_read_support_format_iso9660</b>(),
<b>archive_read_support_format_lha</b>(),
<b>archive_read_support_format_mtree</b>(),
<b>archive_read_support_format_rar</b>(),
<b>archive_read_support_format_raw</b>(),
<b>archive_read_support_format_tar</b>(),
<b>archive_read_support_format_xar</b>(),
<b>archive_read_support_format_zip</b>()</p>
<p style="margin-left:17%;">Enables support---including
auto-detection code---for the specified archive format. For
example, <b>archive_read_support_format_tar</b>() enables
support for a variety of standard tar formats, old-style
tar, ustar, pax interchange format, and many common
variants.</p>
<p><b>archive_read_support_format_all</b>()</p>
<p style="margin-left:17%;">Enables support for all
available formats except the ’’raw’’
format (see below).</p>
<p><b>archive_read_support_format_by_code</b>()</p>
<p style="margin-left:17%;">Enables a single format
specified by the format code. This can be useful when
reading a single archive twice; use <b>archive_format</b>()
after reading the first time and pass the resulting code to
this function to selectively enable only the necessary
format support. Note: In statically-linked executables, this
will cause your program to include support for every format.
If executable size is a concern, you may wish to avoid using
this function.</p>
<p><b>archive_read_support_format_empty</b>()</p>
<p style="margin-left:17%;">Enables support for treating
empty files as empty archives. Because empty files are valid
for several different formats, it is not possible to
accurately determine a format for an empty file based purely
on contents. So empty files are treated by libarchive as a
distinct format.</p>
<p><b>archive_read_support_format_raw</b>()</p>
<p style="margin-left:17%;">The
’’raw’’ format handler allows
libarchive to be used to read arbitrary data. It treats any
data stream as an archive with a single entry. The pathname
of this entry is ’’data’’; all other
entry fields are unset. This is not enabled by
<b>archive_read_support_format_all</b>() in order to avoid
erroneous handling of damaged archives.</p>
<p style="margin-top: 1em"><b>RETURN VALUES</b></p>
<p style="margin-left:6%;">These functions return
<b>ARCHIVE_OK</b> on success, or <b>ARCHIVE_FATAL</b>.</p>
<p style="margin-top: 1em"><b>ERRORS</b></p>
<p style="margin-left:6%;">Detailed error codes and textual
descriptions are available from the <b>archive_errno</b>()
and <b>archive_error_string</b>() functions.</p>
<p style="margin-top: 1em"><b>SEE ALSO</b></p>
<p style="margin-left:6%;">tar(1), libarchive(3),
archive_read_data(3), archive_read_filter(3),
archive_read_set_options(3), archive_util(3), tar(5)</p>
<p style="margin-top: 1em"><b>BUGS</b></p>
<p style="margin-left:6%;">Many traditional archiver
programs treat empty files as valid empty archives. For
example, many implementations of tar(1) allow you to append
entries to an empty file. Of course, it is impossible to
determine the format of an empty file by inspecting the
contents, so this library treats empty files as having a
special ’’empty’’ format.</p>
<p style="margin-left:6%; margin-top: 1em">Using the
’’raw’’ handler together with any
other handler will often work but can produce surprising
results.</p>
<p style="margin-left:6%; margin-top: 1em">BSD
February 2, 2012 BSD</p>
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