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2010-03-07Treat all integer multiplier suffixes as base-2.Lasse Collin1-20/+28
Originally both base-2 and base-10 were supported, but since there seems to be little need for base-10 in XZ Utils, treat everything as base-2 and also be more relaxed about the case of the first letter of the suffix. Now xz will accept e.g. KiB, Ki, k, K, kB, and KB, and interpret them all as 1024. The recommended spelling of the suffixes are still KiB, MiB, and GiB.
2010-03-07Increase the default memory usage limit on "low-memory" systems.Lasse Collin1-6/+15
Previously the default limit was always 40 % of RAM. The new limit is a little bit more complex: - If 40 % of RAM is at least 80 MiB, 40 % of RAM is used as the limit. - If 80 % of RAM is over 80 MiB, 80 MiB is used as the limit. - Otherwise 80 % of RAM is used as the limit. This should make it possible to decompress files created with "xz -9" on more systems. Swapping is generally more expected on systems with less RAM, so higher default limit on them shouldn't cause too bad surprises in terms of heavy swapping. Instead, the higher default limit should reduce the number of bad surprises when it used to prevent decompression of files created with "xz -9". The DoS prevention system shouldn't be a DoS itself. Note that even with the new default limit, a system with 64 MiB RAM cannot decompress files created with "xz -9" without user overriding the limit. This should be OK, because if xz is going to need more memory than the system has RAM, it will run very very slowly and thus it's good that user has to override the limit in that case.
2010-02-12Collection of language fixes to comments and docs.Lasse Collin1-8/+8
Thanks to Jonathan Nieder.
2010-01-15Update the xz man page to match the previous two commits.Lasse Collin1-6/+3
2009-11-25Create sparse files by default when decompressing intoLasse Collin1-0/+11
a regular file. Sparse file creation can be disabled with --no-sparse. I don't promise yet that the name of this option won't change before 5.0.0. It's possible that the code, that checks when it is safe to use sparse output on stdout, is not good enough, and a more flexible command line option is needed to configure sparse file handling.
2009-11-16Add support for --info-memory and --robot to xz.Lasse Collin1-4/+36
Currently --robot works only with --info-memory and --version. --help and --long-help work too, but --robot has no effect on them. Thanks to Jonathan Nieder for the original patches.
2009-11-14Some updates to xz man page.Lasse Collin1-5/+49
2009-08-27Update xz man page date.Lasse Collin1-1/+1
2009-08-27Some xz man page improvements.Lasse Collin1-16/+62
2009-08-17Some xz man changes.Lasse Collin1-45/+43
2009-08-13Fix first line of xz man page.Lasse Collin1-1/+1
2009-08-10Added a rough version of the xz man page.Lasse Collin1-0/+1206