| xz-utils (4.999.9beta+20100212-2) unstable; urgency=low |
| |
| The tiny xzdec and lzmadec decompressors have been moved to the new |
| xzdec package. One can use xzcat (which is an abbreviation for |
| “xz --decompress --stdout”) to replace them where space is not a |
| premium. |
| |
| -- Jonathan Nieder <jrnieder@gmail.com> Tue, 23 Feb 2010 08:24:10 -0600 |
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| xz-utils (4.999.9beta+20100117-1) unstable; urgency=low |
| |
| From this version on, xz produces sparse files by default when |
| decompressing. This saves disk space when reproducing files with long |
| runs of zero bytes, such as file system images. Implementing this |
| feature requires seeking forward beyond the end of a file so that the |
| operating system knows where to put in a hole. |
| |
| If you use xz --decompress to write to end of a file that is appended |
| to at the same time by another process, this could cause concurrent |
| output from the other command to be overwritten. This is a rare and |
| quite weird thing to do. If you really want to do it, note that xz’s |
| buffering strategy is not part of its documented interface; to safely |
| interleave concurrent output from xz and another command, a |
| construction such as |
| |
| xz --decompress input.xz | dd ibs=1k obs=1k >> log |
| |
| would be needed to avoid unpredictable results. |
| |
| -- Jonathan Nieder <jrnieder@gmail.com> Tue, 02 Feb 2010 15:51:37 -0600 |
| |