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tar: add support for compressing with an external tool

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... and add xz, compress and lzma as options
This commit is contained in:
Hiltjo Posthuma
2015-05-08 12:43:33 +02:00
committed by sin
parent 7dff7d4c83
commit 1d9d17eba2
2 changed files with 57 additions and 21 deletions
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tar.1
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@@ -7,12 +7,13 @@
.Sh SYNOPSIS
.Nm
.Op Fl C Ar dir
.Op Fl j | Fl z
.Op Fl J | Fl Z | Fl a | Fl j | Fl z
.Fl x Op Fl m | Fl t
.Op Fl f Ar file
.Op Ar file ...
.Nm
.Op Fl C Ar dir
.Op Fl J | Fl Z | Fl a | Fl j | Fl z
.Op Fl h
.Fl c Ar path ...
.Op Fl f Ar file
@@ -40,16 +41,14 @@ List all files in the archive.
Extract archive.
.It Fl h
Always dereference symbolic links while recursively traversing directories.
.It Fl j | Fl z
Use bzip2 | gzip decompression. The
.Xr bzip2 1 |
.Xr gzip 1
.It Fl J | Fl Z | Fl a | Fl j | Fl z
Use xz | compress | lzma | bzip2 | gzip decompression. These
utilities must be installed separately.
Using these flags is discouraged in favour of the flexibility
and clarity of pipes:
.Bd -literal -offset indent
$ bzcat archive.tar.bz2 | tar -x
$ zcat archive.tar.gz | tar -x
$ bzip2 -cd archive.tar.bz2 | tar -x
$ gzip -cd archive.tar.gz | tar -x
.Ed
.Bd -literal -offset indent
$ tar -c file ... | bzip2 > archive.tar.bz2