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Diffstat (limited to 'doc/lzip.texinfo')
| -rw-r--r-- | doc/lzip.texinfo | 40 |
1 files changed, 24 insertions, 16 deletions
diff --git a/doc/lzip.texinfo b/doc/lzip.texinfo index a6d5d79..9cacd16 100644 --- a/doc/lzip.texinfo +++ b/doc/lzip.texinfo @@ -5,8 +5,8 @@ @finalout @c %**end of header -@set UPDATED 17 January 2010 -@set VERSION 1.9 +@set UPDATED 5 April 2010 +@set VERSION 1.10 @dircategory Data Compression @direntry @@ -85,11 +85,11 @@ compressed tar archives. The amount of memory required for compression is about 5 MiB plus 1 or 2 times the dictionary size limit (1 if input file size is less than dictionary size limit, else 2) plus 8 times the dictionary size really -used. For decompression is a little more than the dictionary size really -used. Lzip will automatically use the smallest possible dictionary size -without exceeding the given limit. It is important to appreciate that -the decompression memory requirement is affected at compression time by -the choice of dictionary size limit. +used. For decompression it is a little more than the dictionary size +really used. Lzip will automatically use the smallest possible +dictionary size without exceeding the given limit. It is important to +appreciate that the decompression memory requirement is affected at +compression time by the choice of dictionary size limit. When decompressing, lzip attempts to guess the name for the decompressed file from that of the compressed file as follows: @@ -274,15 +274,15 @@ as shown in the table below. Note that @samp{-9} can be much slower than @multitable {Level} {Dictionary size} {Match length limit} @item Level @tab Dictionary size @tab Match length limit -@item -1 @tab 1MiB @tab 10 bytes -@item -2 @tab 1MiB @tab 12 bytes -@item -3 @tab 1MiB @tab 17 bytes -@item -4 @tab 2MiB @tab 26 bytes -@item -5 @tab 4MiB @tab 44 bytes -@item -6 @tab 8MiB @tab 80 bytes -@item -7 @tab 16MiB @tab 108 bytes -@item -8 @tab 16MiB @tab 163 bytes -@item -9 @tab 32MiB @tab 273 bytes +@item -1 @tab 1 MiB @tab 10 bytes +@item -2 @tab 1.5 MiB @tab 12 bytes +@item -3 @tab 2 MiB @tab 17 bytes +@item -4 @tab 3 MiB @tab 26 bytes +@item -5 @tab 4 MiB @tab 44 bytes +@item -6 @tab 8 MiB @tab 80 bytes +@item -7 @tab 16 MiB @tab 108 bytes +@item -8 @tab 24 MiB @tab 163 bytes +@item -9 @tab 32 MiB @tab 273 bytes @end multitable @item --fast @@ -468,6 +468,14 @@ writes each member in its own .lz file. You can then use @w{@samp{lzip -t}} to test the integrity of the resulting files, and decompress those which are undamaged. +Data from damaged members can be partially recovered writing it to +stdout as shown in the following example (the resulting file may contain +garbage data at the end): + +@example +lzip -cd rec00001file.lz > rec00001file +@end example + Lziprecover takes a single argument, the name of the damaged file, and writes a number of files @samp{rec00001file.lz}, @samp{rec00002file.lz}, etc, containing the extracted members. The output filenames are designed |