ARCHIVE_READ_FORMAT(3)	 BSD Library Functions Manual	ARCHIVE_READ_FORMAT(3)

NAME
     archive_read_support_format_7zip, archive_read_support_format_all,
     archive_read_support_format_ar, archive_read_support_format_by_code,
     archive_read_support_format_cab, archive_read_support_format_cpio,
     archive_read_support_format_empty, archive_read_support_format_iso9660,
     archive_read_support_format_lha, archive_read_support_format_mtree,
     archive_read_support_format_rar, archive_read_support_format_raw,
     archive_read_support_format_tar, archive_read_support_format_xar,
     archive_read_support_format_zip — functions for reading streaming ar‐
     chives

LIBRARY
     Streaming Archive Library (libarchive, -larchive)

SYNOPSIS
     #include <archive.h>

     int
     archive_read_support_format_7zip(struct archive *);

     int
     archive_read_support_format_all(struct archive *);

     int
     archive_read_support_format_ar(struct archive *);

     int
     archive_read_support_format_by_code(struct archive *, int);

     int
     archive_read_support_format_cab(struct archive *);

     int
     archive_read_support_format_cpio(struct archive *);

     int
     archive_read_support_format_empty(struct archive *);

     int
     archive_read_support_format_iso9660(struct archive *);

     int
     archive_read_support_format_lha(struct archive *);

     int
     archive_read_support_format_mtree(struct archive *);

     int
     archive_read_support_format_rar(struct archive *);

     int
     archive_read_support_format_raw(struct archive *);

     int
     archive_read_support_format_tar(struct archive *);

     int
     archive_read_support_format_xar(struct archive *);

     int
     archive_read_support_format_zip(struct archive *);

DESCRIPTION
     archive_read_support_format_7zip(), archive_read_support_format_ar(),
	     archive_read_support_format_cab(),
	     archive_read_support_format_cpio(),
	     archive_read_support_format_iso9660(),
	     archive_read_support_format_lha(),
	     archive_read_support_format_mtree(),
	     archive_read_support_format_rar(),
	     archive_read_support_format_raw(),
	     archive_read_support_format_tar(),
	     archive_read_support_format_xar(),
	     archive_read_support_format_zip()
	     Enables support---including auto-detection code---for the speci‐
	     fied archive format.  For example,
	     archive_read_support_format_tar() enables support for a variety
	     of standard tar formats, old-style tar, ustar, pax interchange
	     format, and many common variants.
     archive_read_support_format_all()
	     Enables support for all available formats except the “raw” format
	     (see below).
     archive_read_support_format_by_code()
	     Enables a single format specified by the format code.  This can
	     be useful when reading a single archive twice; use
	     archive_format() after reading the first time and pass the re‐
	     sulting code to this function to selectively enable only the nec‐
	     essary 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.
     archive_read_support_format_empty()
	     Enables support for treating empty files as empty archives.  Be‐
	     cause 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.
     archive_read_support_format_raw()
	     The “raw” format handler allows libarchive to be used to read ar‐
	     bitrary 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
	     archive_read_support_format_all() in order to avoid erroneous
	     handling of damaged archives.

RETURN VALUES
     These functions return ARCHIVE_OK on success, or ARCHIVE_FATAL.

ERRORS
     Detailed error codes and textual descriptions are available from the
     archive_errno() and archive_error_string() functions.

SEE ALSO
     tar(1), archive_read_data(3), archive_read_filter(3),
     archive_read_set_options(3), archive_util(3), libarchive(3), tar(5)

BUGS
     Many traditional archiver programs treat empty files as valid empty ar‐
     chives.  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.

     Using the “raw” handler together with any other handler will often work
     but can produce surprising results.

BSD			       February 2, 2012				   BSD
