Hi!
Would you please consider this patch for p7zip support? It picks the -I flag
which seemed to be unused.
p7zip the Un*x port of 7z, a free (LGPL) compressor which outperforms all other
popular compression applications (including propietary ones). See
http://p7zip.sf.net/ and http://www.7zip.org/ for details.
Thanks for considering.
ChangeLog:
2005-12-28 Robert Millan <[EMAIL PROTECTED]>
* src/buffer.c: Detect, compress and extract p7zip (with -I).
* src/tar.c: Ditto.
* README: Document p7zip support.
* doc/tar.texi: Ditto.
--
Robert Millan
2005-12-28 Robert Millan <[EMAIL PROTECTED]>
* src/buffer.c: Detect, compress and extract p7zip (with -I).
* src/tar.c: Ditto.
* README: Document p7zip support.
* doc/tar.texi: Ditto.
diff -ur tar.old/README tar/README
--- tar.old/README 2005-05-15 05:59:09.000000000 +0200
+++ tar/README 2005-12-14 11:56:44.051330136 +0100
@@ -84,14 +84,15 @@
Here are a few hints which might help installing `tar' on some systems.
-** gzip and bzip2.
+** gzip, bzip2 and p7zip.
-GNU tar uses the gzip and bzip2 programs to read and write compressed
+GNU tar uses the gzip, bzip2 and p7zip programs to read and write compressed
archives. If you don't have these programs already, you need to
install them. Their sources can be found at:
ftp://ftp.gnu.org/gnu/gzip/
http://sourceware.cygnus.com/bzip2/
+http://p7zip.sf.net/
If you see the following symptoms:
diff -ur tar.old/doc/tar.texi tar/doc/tar.texi
--- tar.old/doc/tar.texi 2005-12-11 15:10:53.000000000 +0100
+++ tar/doc/tar.texi 2005-12-14 11:55:12.861193144 +0100
@@ -2831,6 +2831,13 @@
@itemx --old-archive
Synonym for @option{--format=v7}.
[EMAIL PROTECTED] p7zip, summary
[EMAIL PROTECTED] --p7zip
[EMAIL PROTECTED] -I
+
+This option tells @command{tar} to read or write archives through
[EMAIL PROTECTED] @xref{gzip}.
+
@opindex posix, summary
@item --posix
Same as @option{--format=posix}.
@@ -3131,6 +3138,10 @@
@option{--incremental}
[EMAIL PROTECTED] -I
+
[EMAIL PROTECTED]
+
@item -K
@option{--starting-file}
@@ -7182,19 +7193,20 @@
@cindex Storing archives in compressed format
@GNUTAR{} is able to create and read compressed archives. It supports
[EMAIL PROTECTED] and @command{bzip2} compression programs. For backward
[EMAIL PROTECTED], @command{bzip2} and @command{p7zip} compression programs.
For backward
compatibilty, it also supports @command{compress} command, although
we strongly recommend against using it, since there is a patent
covering the algorithm it uses and you could be sued for patent
infringement merely by running @command{compress}! Besides, it is less
-effective than @command{gzip} and @command{bzip2}.
+effective than @command{gzip}, @command{bzip2} or @command{p7zip}.
Creating a compressed archive is simple: you just specify a
@dfn{compression option} along with the usual archive creation
commands. The compression option is @option{-z} (@option{--gzip}) to
create a @command{gzip} compressed archive, @option{-j}
-(@option{--bzip2}) to create a @command{bzip2} compressed archive, and
[EMAIL PROTECTED] (@option{--compress}) to use @command{compress} program.
+(@option{--bzip2}) to create a @command{bzip2} compressed archive,
[EMAIL PROTECTED] (@option{--compress}) to use @command{compress} program, and
[EMAIL PROTECTED] (@option{--p7zip}) to create a @command{p7zip} compressed
archive.
For example:
@smallexample
diff -ur tar.old/src/buffer.c tar/src/buffer.c
--- tar.old/src/buffer.c 2005-12-09 11:04:26.000000000 +0100
+++ tar/src/buffer.c 2005-12-14 12:00:08.988175000 +0100
@@ -181,7 +181,8 @@
ct_none,
ct_compress,
ct_gzip,
- ct_bzip2
+ ct_bzip2,
+ ct_p7zip
};
struct zip_magic
@@ -198,6 +199,7 @@
{ ct_compress, 2, "\037\235", "compress", "-Z" },
{ ct_gzip, 2, "\037\213", "gzip", "-z" },
{ ct_bzip2, 3, "BZh", "bzip2", "-j" },
+ { ct_p7zip, 6, "7z\274\257\047\034", "p7zip", "-I" },
};
#define NMAGIC (sizeof(magic)/sizeof(magic[0]))
diff -ur tar.old/src/tar.c tar/src/tar.c
--- tar.old/src/tar.c 2005-12-11 15:12:12.000000000 +0100
+++ tar/src/tar.c 2005-12-14 12:02:32.389374704 +0100
@@ -520,6 +520,8 @@
N_("create archive with volume name TEXT. At list/extract time, use TEXT as
a globbing pattern for volume name"), GRID+8 },
{"bzip2", 'j', 0, 0,
N_("filter the archive through bzip2"), GRID+8 },
+ {"p7zip", 'I', 0, 0,
+ N_("filter the archive through p7zip"), GRID+8 },
{"gzip", 'z', 0, 0,
N_("filter the archive through gzip"), GRID+8 },
{"gunzip", 0, 0, OPTION_ALIAS, NULL, GRID+8 },
@@ -1002,9 +1004,7 @@
break;
case 'I':
- USAGE_ERROR ((0, 0,
- _("Warning: the -I option is not supported;"
- " perhaps you meant -j or -T?")));
+ set_use_compress_program_option ("p7zip");
break;
case 'j':
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