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ARCHIVE_READ_FORMAT

Section: C Library Functions (3)
Index Return to Main Contents

BSD mandoc
 

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 archives  

LIBRARY

Streaming Archive Library (libarchive, -larchive)  

SYNOPSIS

In archive.h Ft int Fn archive_read_support_format_7zip struct archive * Ft int Fn archive_read_support_format_all struct archive * Ft int Fn archive_read_support_format_ar struct archive * Ft int Fn archive_read_support_format_by_code struct archive * int Ft int Fn archive_read_support_format_cab struct archive * Ft int Fn archive_read_support_format_cpio struct archive * Ft int Fn archive_read_support_format_empty struct archive * Ft int Fn archive_read_support_format_iso9660 struct archive * Ft int Fn archive_read_support_format_lha struct archive * Ft int Fn archive_read_support_format_mtree struct archive * Ft int Fn archive_read_support_format_rar struct archive * Ft int Fn archive_read_support_format_raw struct archive * Ft int Fn archive_read_support_format_tar struct archive * Ft int Fn archive_read_support_format_xar struct archive * Ft int Fn archive_read_support_format_zip struct archive *  

DESCRIPTION

Fn archive_read_support_format_7zip , Fn archive_read_support_format_ar , Fn archive_read_support_format_cab , Fn archive_read_support_format_cpio , Fn archive_read_support_format_iso9660 , Fn archive_read_support_format_lha , Fn archive_read_support_format_mtree , Fn archive_read_support_format_rar , Fn archive_read_support_format_raw , Fn archive_read_support_format_tar , Fn archive_read_support_format_xar , Fn archive_read_support_format_zip
Enables support---including auto-detection code---for the specified archive format. For example, Fn 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.
Fn archive_read_support_format_all
Enables support for all available formats except the ``raw'' format (see below).
Fn 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 Fn archive_format 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.
Fn archive_read_support_format_empty
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.
Fn archive_read_support_format_raw
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 Fn 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 Fn archive_errno and Fn archive_error_string functions.  

SEE ALSO

tar(1), libarchive(3), archive_read_data3, archive_read_filter3, archive_read_set_options3, archive_util3, tar(5)  

BUGS

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.

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


 

Index

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
RETURN VALUES
ERRORS
SEE ALSO
BUGS


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