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dependencies/libarchive-3.4.2/doc/text/archive_read_format.3.txt
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ARCHIVE_READ_FORMAT(3) BSD Library Functions Manual ARCHIVE_READ_FORMAT(3)
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NAME
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archive_read_support_format_7zip, archive_read_support_format_all,
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archive_read_support_format_ar, archive_read_support_format_by_code,
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archive_read_support_format_cab, archive_read_support_format_cpio,
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archive_read_support_format_empty, archive_read_support_format_iso9660,
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archive_read_support_format_lha, archive_read_support_format_mtree,
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archive_read_support_format_rar, archive_read_support_format_raw,
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archive_read_support_format_tar, archive_read_support_format_xar,
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archive_read_support_format_zip -- functions for reading streaming ar-
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chives
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LIBRARY
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Streaming Archive Library (libarchive, -larchive)
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SYNOPSIS
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#include <archive.h>
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int
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archive_read_support_format_7zip(struct archive *);
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int
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archive_read_support_format_all(struct archive *);
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int
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archive_read_support_format_ar(struct archive *);
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int
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archive_read_support_format_by_code(struct archive *, int);
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int
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archive_read_support_format_cab(struct archive *);
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int
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archive_read_support_format_cpio(struct archive *);
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int
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archive_read_support_format_empty(struct archive *);
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int
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archive_read_support_format_iso9660(struct archive *);
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int
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archive_read_support_format_lha(struct archive *);
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int
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archive_read_support_format_mtree(struct archive *);
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int
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archive_read_support_format_rar(struct archive *);
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int
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archive_read_support_format_raw(struct archive *);
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int
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archive_read_support_format_tar(struct archive *);
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int
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archive_read_support_format_xar(struct archive *);
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int
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archive_read_support_format_zip(struct archive *);
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DESCRIPTION
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archive_read_support_format_7zip(), archive_read_support_format_ar(),
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archive_read_support_format_cab(),
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archive_read_support_format_cpio(),
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archive_read_support_format_iso9660(),
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archive_read_support_format_lha(),
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archive_read_support_format_mtree(),
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archive_read_support_format_rar(),
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archive_read_support_format_raw(),
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archive_read_support_format_tar(),
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archive_read_support_format_xar(),
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archive_read_support_format_zip()
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Enables support---including auto-detection code---for the speci-
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fied archive format. For example,
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archive_read_support_format_tar() enables support for a variety
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of standard tar formats, old-style tar, ustar, pax interchange
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format, and many common variants.
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archive_read_support_format_all()
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Enables support for all available formats except the ``raw'' for-
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mat (see below).
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archive_read_support_format_by_code()
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Enables a single format specified by the format code. This can
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be useful when reading a single archive twice; use
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archive_format() after reading the first time and pass the
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resulting code to this function to selectively enable only the
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necessary format support. Note: In statically-linked executa-
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bles, this will cause your program to include support for every
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format. If executable size is a concern, you may wish to avoid
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using this function.
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archive_read_support_format_empty()
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Enables support for treating empty files as empty archives.
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Because empty files are valid for several different formats, it
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is not possible to accurately determine a format for an empty
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file based purely on contents. So empty files are treated by
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libarchive as a distinct format.
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archive_read_support_format_raw()
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The ``raw'' format handler allows libarchive to be used to read
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arbitrary data. It treats any data stream as an archive with a
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single entry. The pathname of this entry is ``data''; all other
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entry fields are unset. This is not enabled by
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archive_read_support_format_all() in order to avoid erroneous
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handling of damaged archives.
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RETURN VALUES
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These functions return ARCHIVE_OK on success, or ARCHIVE_FATAL.
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ERRORS
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Detailed error codes and textual descriptions are available from the
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archive_errno() and archive_error_string() functions.
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SEE ALSO
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tar(1), archive_read_data(3), archive_read_filter(3),
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archive_read_set_options(3), archive_util(3), libarchive(3), tar(5)
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BUGS
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Many traditional archiver programs treat empty files as valid empty ar-
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chives. For example, many implementations of tar(1) allow you to append
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entries to an empty file. Of course, it is impossible to determine the
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format of an empty file by inspecting the contents, so this library
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treats empty files as having a special ``empty'' format.
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Using the ``raw'' handler together with any other handler will often work
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but can produce surprising results.
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BSD February 2, 2012 BSD
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