2006-01-11  Robert Millan  <address@hidden>

	* src/buffer.c:  Detect and extract p7zip.

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", "--use-compress-program=p7zip" },
 };
 
 #define NMAGIC (sizeof(magic)/sizeof(magic[0]))