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103 lines
3.3 KiB
Plaintext
103 lines
3.3 KiB
Plaintext
ARCHIVE_READ_EXTRACT(3) manual page
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== NAME ==
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'''archive_read_extract''',
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'''archive_read_extract2''',
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'''archive_read_extract_set_progress_callback'''
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- functions for reading streaming archives
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== LIBRARY ==
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Streaming Archive Library (libarchive, -larchive)
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== SYNOPSIS ==
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'''<nowiki>#include <archive.h></nowiki>'''
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<br>
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''int''
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<br>
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'''archive_read_extract'''(''struct archive *'', ''struct archive_entry *'', ''int flags'');
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<br>
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''int''
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<br>
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'''archive_read_extract2'''(''struct archive *src'', ''struct archive_entry *'', ''struct archive *dest'');
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<br>
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''void''
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<br>
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'''archive_read_extract_set_progress_callback'''(''struct archive *'', ''void (*func)(void *)'', ''void *user_data'');
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== DESCRIPTION ==
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<dl>
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<dt>'''archive_read_extract'''(), '''archive_read_extract_set_skip_file'''()</dt><dd>
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A convenience function that wraps the corresponding
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[[ManPageArchiveWriteDisk3]]
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interfaces.
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The first call to
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'''archive_read_extract'''()
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creates a restore object using
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[[ManPageArchiveWriteDiskNew3]]
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and
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[[ManPageArchiveWriteDiskSetStandardLookup3]],
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then transparently invokes
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[[ManPageArchiveWriteDiskSetOptions3]],
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[[ManPageArchiveWriteHeader3]],
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[[ManPageArchiveWriteData3]],
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and
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[[ManPageArchiveWriteFinishEntry3]]
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to create the entry on disk and copy data into it.
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The
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''flags''
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argument is passed unmodified to
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[[ManPageArchiveWriteDiskSetOptions3]].
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</dd><dt>'''archive_read_extract2'''()</dt><dd>
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This is another version of
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'''archive_read_extract'''()
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that allows you to provide your own restore object.
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In particular, this allows you to override the standard lookup functions
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using
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[[ManPageArchiveWriteDiskSetGroupLookup3]],
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and
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[[ManPageArchiveWriteDiskSetUserLookup3]].
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Note that
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'''archive_read_extract2'''()
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does not accept a
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''flags''
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argument; you should use
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'''archive_write_disk_set_options'''()
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to set the restore options yourself.
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</dd><dt>'''archive_read_extract_set_progress_callback'''()</dt><dd>
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Sets a pointer to a user-defined callback that can be used
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for updating progress displays during extraction.
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The progress function will be invoked during the extraction of large
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regular files.
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The progress function will be invoked with the pointer provided to this call.
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Generally, the data pointed to should include a reference to the archive
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object and the archive_entry object so that various statistics
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can be retrieved for the progress display.
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</dd></dl>
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== RETURN VALUES ==
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Most functions return zero on success, non-zero on error.
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The possible return codes include:
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'''ARCHIVE_OK'''
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(the operation succeeded),
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'''ARCHIVE_WARN'''
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(the operation succeeded but a non-critical error was encountered),
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'''ARCHIVE_EOF'''
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(end-of-archive was encountered),
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'''ARCHIVE_RETRY'''
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(the operation failed but can be retried),
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and
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'''ARCHIVE_FATAL'''
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(there was a fatal error; the archive should be closed immediately).
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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'''()
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and
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'''archive_error_string'''()
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functions.
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== SEE ALSO ==
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[[ManPageBsdtar1]],
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[[ManPageArchiveRead3]],
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[[ManPageArchiveReadData3]],
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[[ManPageArchiveReadFilter3]],
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[[ManPageArchiveReadFormat3]],
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[[ManPageArchiveReadOpen3]],
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[[ManPageArchiveReadSetOptions3]],
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[[ManPageArchiveUtil3]],
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[[ManPageLibarchive3]],
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[[ManPageTar5]]
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