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Diffstat (limited to 'doc/tarlz.texi')
| -rw-r--r-- | doc/tarlz.texi | 54 |
1 files changed, 29 insertions, 25 deletions
diff --git a/doc/tarlz.texi b/doc/tarlz.texi index f451e5a..bfa6d9d 100644 --- a/doc/tarlz.texi +++ b/doc/tarlz.texi @@ -6,8 +6,8 @@ @finalout @c %**end of header -@set UPDATED 14 June 2021 -@set VERSION 0.21 +@set UPDATED 5 January 2022 +@set VERSION 0.22 @dircategory Data Compression @direntry @@ -50,7 +50,7 @@ This manual is for Tarlz (version @value{VERSION}, @value{UPDATED}). @end menu @sp 1 -Copyright @copyright{} 2013-2021 Antonio Diaz Diaz. +Copyright @copyright{} 2013-2022 Antonio Diaz Diaz. This manual is free documentation: you have unlimited permission to copy, distribute, and modify it. @@ -137,8 +137,9 @@ tarlz [@var{options}] [@var{files}] @end example @noindent -All operations except @samp{--concatenate} operate on whole trees if any -@var{file} is a directory. Tarlz overwrites output files without warning. +All operations except @samp{--concatenate} and @samp{--compress} operate on +whole trees if any @var{file} is a directory. All operations except +@samp{--compress} overwrite output files without warning. On archive creation or appending tarlz archives the files specified, but removes from member names any leading and trailing slashes and any file name @@ -467,12 +468,13 @@ values range from 1 to 1024. The default value is 64. @item --check-lib Compare the @uref{http://www.nongnu.org/lzip/manual/lzlib_manual.html#Library-version,,version of lzlib} -used to compile tarlz with the version actually being used and exit. Report -any differences found. Exit with error status 1 if differences are found. A -mismatch may indicate that lzlib is not correctly installed or that a -different version of lzlib has been installed after compiling tarlz. -@w{@samp{tarlz -v --check-lib}} shows the version of lzlib being used and -the value of @samp{LZ_API_VERSION} (if defined). +used to compile tarlz with the version actually being used at run time and +exit. Report any differences found. Exit with error status 1 if differences +are found. A mismatch may indicate that lzlib is not correctly installed or +that a different version of lzlib has been installed after compiling tarlz. +Exit with error status 2 if LZ_API_VERSION and LZ_version_string don't +match. @w{@samp{tarlz -v --check-lib}} shows the version of lzlib being used +and the value of LZ_API_VERSION (if defined). @ifnothtml @xref{Library version,,,lzlib}. @end ifnothtml @@ -671,10 +673,11 @@ CRC32-C (Castagnoli) of the extended header data excluding the 8 bytes representing the CRC <value> itself. The <value> is represented as 8 hexadecimal digits in big endian order, @w{@samp{22 GNU.crc32=00000000\n}}. The keyword of the CRC record is -protected by the CRC to guarante that corruption is always detected -(except in case of CRC collision). A CRC was chosen because a checksum -is too weak for a potentially large list of variable sized records. A -checksum can't detect simple errors like the swapping of two bytes. +protected by the CRC to guarante that corruption is always detected when +using @samp{--missing-crc} (except in case of CRC collision). A CRC was +chosen because a checksum is too weak for a potentially large list of +variable sized records. A checksum can't detect simple errors like the +swapping of two bytes. @end table @@ -926,16 +929,16 @@ with the file data read from the file system. The muxer collects processed packets from the workers, and writes them to the archive. @verbatim -,--------, +.--------. | data|---> to each worker below -| | ,------------, +| | .------------. | file | ,-->| worker 0 |--, | system | | `------------' | -| | ,---------, | ,------------, | ,-------, ,---------, +| | .---------. | .------------. | .-------. .---------. |metadata|--->| grouper |-+-->| worker 1 |--+-->| muxer |-->| archive | `--------' `---------' | `------------' | `-------' `---------' | ... | - | ,------------, | + | .------------. | `-->| worker N-1 |--' `------------' @end verbatim @@ -947,17 +950,17 @@ access files in the file system either to read them (diff) or write them (extract). As in plzip, each worker reads members directly from the archive. @verbatim -,--------, +.--------. | file |<---> data to/from each worker below | system | -`--------' ,------------, +`--------' .------------. ,-->| worker 0 |--, | `------------' | -,---------, | ,------------, | ,-------, ,--------, +.---------. | .------------. | .-------. .--------. | archive |-+-->| worker 1 |--+-->| muxer |-->| stdout | `---------' | `------------' | `-------' | stderr | | ... | `--------' - | ,------------, | + | .------------. | `-->| worker N-1 |--' `------------' @end verbatim @@ -1041,7 +1044,7 @@ time tarlz -tf silesia.tar.lz (0.020s) On the other hand, multi-threaded @samp{--list} won't detect corruption in the tar member data because it only decodes the part of each lzip member corresponding to the tar member header. This is another reason why the tar -headers must provide its own integrity checking. +headers must provide their own integrity checking. @sp 1 @section Limitations of multi-threaded extraction @@ -1212,7 +1215,8 @@ for all eternity, if not longer. If you find a bug in tarlz, please send electronic mail to @email{lzip-bug@@nongnu.org}. Include the version number, which you can -find by running @w{@samp{tarlz --version}}. +find by running @w{@samp{tarlz --version}} and +@w{@samp{tarlz -v --check-lib}}. @node Concept index |