10-19-2012
compressed and tar file integrity
How can I ensure the folder that I tar and compress is good to be archive in DVD or tape? Must I uncompress and untar the file, or there is any way to tell the integerity of the compressed file before send to archive? I have bad experience on this, which the archive compressed file cold not be opened, the error message is unexpected EOF. I guess it could be incomplete archive process.
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LEARN ABOUT FREEBSD
archive_write_add_filter_program
ARCHIVE_WRITE_FILTER(3) BSD Library Functions Manual ARCHIVE_WRITE_FILTER(3)
NAME
archive_write_add_filter_bzip2, archive_write_add_filter_compress, archive_write_add_filter_gzip, archive_write_add_filter_lzip,
archive_write_add_filter_lzma, archive_write_add_filter_none, archive_write_add_filter_program, archive_write_add_filter_xz
LIBRARY
Streaming Archive Library (libarchive, -larchive)
SYNOPSIS
#include <archive.h>
int
archive_write_add_filter_bzip2(struct archive *);
int
archive_write_add_filter_compress(struct archive *);
int
archive_write_add_filter_gzip(struct archive *);
int
archive_write_add_filter_lzip(struct archive *);
int
archive_write_add_filter_lzma(struct archive *);
int
archive_write_add_filter_none(struct archive *);
int
archive_write_add_filter_program(struct archive *, const char * cmd);
int
archive_write_add_filter_xz(struct archive *);
DESCRIPTION
archive_write_add_filter_bzip2(), archive_write_add_filter_compress(), archive_write_add_filter_gzip(), archive_write_add_filter_lzip(),
archive_write_add_filter_lzma(), archive_write_add_filter_xz(),
The resulting archive will be compressed as specified. Note that the compressed output is always properly blocked.
archive_write_add_filter_none()
This is never necessary. It is provided only for backwards compatibility.
archive_write_add_filter_program()
The archive will be fed into the specified compression program. The output of that program is blocked and written to the client
write callbacks.
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), libarchive(3), archive_write(3), archive_write_format(3), archive_write_set_options(3), cpio(5), mtree(5), tar(5)
BSD
February 2, 2012 BSD