diff options
| -rw-r--r-- | src/xz/xz.1 | 35 |
1 files changed, 23 insertions, 12 deletions
diff --git a/src/xz/xz.1 b/src/xz/xz.1 index 156fd8fa..696a2f49 100644 --- a/src/xz/xz.1 +++ b/src/xz/xz.1 @@ -5,7 +5,7 @@ .\" This file has been put into the public domain. .\" You can do whatever you want with this file. .\" -.TH XZ 1 "2012-10-03" "Tukaani" "XZ Utils" +.TH XZ 1 "2013-06-21" "Tukaani" "XZ Utils" . .SH NAME xz, unxz, xzcat, lzma, unlzma, lzcat \- Compress or decompress .xz and .lzma files @@ -960,11 +960,14 @@ option. .SS "Custom compressor filter chains" A custom filter chain allows specifying the compression settings in detail instead of relying on -the settings associated to the preset levels. +the settings associated to the presets. When a custom filter chain is specified, -the compression preset level options -(\fB\-0\fR ... \fB\-9\fR and \fB\-\-extreme\fR) are -silently ignored. +preset options (\fB\-0\fR ... \fB\-9\fR and \fB\-\-extreme\fR) +earlier on the command line are forgotten. +If a preset option is specified +after one or more custom filter chain options, +the new preset takes effect and +the custom filter chain options specified earlier are forgotten. .PP A filter chain is comparable to piping on the command line. When compressing, the uncompressed input goes to the first filter, @@ -997,6 +1000,15 @@ Extra commas in are ignored. Every option has a default value, so you need to specify only those you want to change. +.PP +To see the whole filter chain and +.IR options , +use +.B "xz \-vv" +(that is, use +.B \-\-verbose +twice). +This works also for viewing the filter chain options used by presets. .TP \fB\-\-lzma1\fR[\fB=\fIoptions\fR] .PD 0 @@ -1039,13 +1051,12 @@ The only supported modifier is currently .BR e , which matches .BR \-\-extreme . -The default -.I preset -is -.BR 6 , -from which the default values for the rest of the LZMA1 or LZMA2 +If no +.B preset +is specified, the default values of LZMA1 or LZMA2 .I options -are taken. +are taken from the preset +.BR 6 . .TP .BI dict= size Dictionary (history buffer) @@ -1641,7 +1652,7 @@ is supported only together with .BR \-\-info\-memory , and .BR \-\-list . -It will be supported for normal compression and +It will be supported for compression and decompression in the future. . .SS Version |