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Bug#686502: pxz produces archives broken for busybox's unxz



Hi,

Can you please test the attached patch

Cheers,
diff -Nru busybox-1.20.0/debian/changelog busybox-1.20.0/debian/changelog
--- busybox-1.20.0/debian/changelog	2012-09-20 08:32:55.000000000 +0200
+++ busybox-1.20.0/debian/changelog	2012-12-20 22:04:02.000000000 +0100
@@ -1,3 +1,9 @@
+busybox (1:1.20.0-7.1) unstable; urgency=low
+
+  * Fix decompression of multi stream XZ files
+
+ -- Abou Al Montacir <abou.almontacir@sfr.fr>  Thu, 20 Dec 2012 22:04:00 +0100
+
 busybox (1:1.20.0-7) unstable; urgency=low
 
   * set CONFIG_FEATURE_COPYBUF_KB from 4 to 64 for all flavours.  This
diff -Nru busybox-1.20.0/debian/patches/fix-unxz-with-multiple-streams.patch busybox-1.20.0/debian/patches/fix-unxz-with-multiple-streams.patch
--- busybox-1.20.0/debian/patches/fix-unxz-with-multiple-streams.patch	1970-01-01 01:00:00.000000000 +0100
+++ busybox-1.20.0/debian/patches/fix-unxz-with-multiple-streams.patch	2012-12-20 22:01:15.000000000 +0100
@@ -0,0 +1,21 @@
+Author: Abou Al Montacir <abou.almontacir@sfr.fr>
+Purpose: Fix decompression of multi stream XZ compressed files
+ (Closes: bug#686502)
+
+--- busybox-1.20.0~/archival/libarchive/decompress_unxz.c	2012-12-20 21:51:04.000000000 +0100
++++ busybox-1.20.0/archival/libarchive/decompress_unxz.c	2012-12-20 21:49:11.000000000 +0100
+@@ -87,7 +87,13 @@
+ 			iobuf.out_pos = 0;
+ 		}
+ 		if (r == XZ_STREAM_END) {
+-			break;
++			if (iobuf.in_pos == iobuf.in_size) {
++				break;
++			} else {
++				xz_dec_end(state);
++				state = xz_dec_init(XZ_DYNALLOC, 64*1024*1024);
++				continue;
++			}
+ 		}
+ 		if (r != XZ_OK && r != XZ_UNSUPPORTED_CHECK) {
+ 			bb_error_msg("corrupted data");
diff -Nru busybox-1.20.0/debian/patches/series busybox-1.20.0/debian/patches/series
--- busybox-1.20.0/debian/patches/series	2012-09-19 22:58:00.000000000 +0200
+++ busybox-1.20.0/debian/patches/series	2012-12-20 21:54:21.000000000 +0100
@@ -25,3 +25,6 @@
 dont-force-no-alignment-for-s390.patch
 
 stop-checking-ancient-kernel-version.patch
+
+# http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=686502
+fix-unxz-with-multiple-streams.patch

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