gnu: libarchive: Fix test failure on SELinux systems.

Reported by Jan Synáček <jan.synacek@gmail.com>
at <https://lists.gnu.org/archive/html/guix-devel/2015-11/msg00522.html>.

* gnu/packages/patches/libarchive-bsdtar-test.patch: New file.
* gnu/packages/backup.scm (libarchive)[source]: Use it.
* gnu-system.am (dist_patch_DATA): Add it.

1 files changed, 74 insertions, 0 deletions

diff --git a/gnu/packages/patches/libarchive-bsdtar-test.patch b/gnu/packages/patches/libarchive-bsdtar-test.patch
new file mode 100644
index 0000000000..6a533a9a07
--- /dev/null
+++ b/gnu/packages/patches/libarchive-bsdtar-test.patch
@@ -0,0 +1,74 @@
+commit b539b2e597b566fe3c4b49cb61c9eef83e5e052d
+Author: Pavel Raiskup <praiskup@redhat.com>
+Date:   Thu Jun 27 16:01:30 2013 +0200
+
+    Use ustar format in the test_option_b test
+    
+    .. because the ustar archive does not store SELinux context.  As the default
+    format for bsdtar is "restricted pax" (trying to store xattrs and other
+    things by default), the test failed on Fedora because our files have by
+    default SELinux context set.  This results in additional data in tested
+    archive ~> and the test failed because the archive was unexpectedly big:
+    
+     tar/test/test_option_b.c:41: File archive1.tar has size 3072, expected 2048
+    
+    Reviewed by Konrad Kleine <konrad.wilhelm.kleine@gmail.com>
+
+diff --git a/tar/test/test_option_b.c b/tar/test/test_option_b.c
+index be2ae65..6fea474 100644
+--- a/tar/test/test_option_b.c
++++ b/tar/test/test_option_b.c
+@@ -25,8 +25,14 @@
+ #include "test.h"
+ __FBSDID("$FreeBSD$");
+ 
++#define USTAR_OPT " --format=ustar"
++
+ DEFINE_TEST(test_option_b)
+ {
++	char *testprog_ustar = malloc(strlen(testprog) + sizeof(USTAR_OPT) + 1);
++	strcpy(testprog_ustar, testprog);
++	strcat(testprog_ustar, USTAR_OPT);
++
+ 	assertMakeFile("file1", 0644, "file1");
+ 	if (systemf("cat file1 > test_cat.out 2> test_cat.err") != 0) {
+ 		skipping("Platform doesn't have cat");
+@@ -36,7 +42,7 @@ DEFINE_TEST(test_option_b)
+ 	/*
+ 	 * Bsdtar does not pad if the output is going directly to a disk file.
+ 	 */
+-	assertEqualInt(0, systemf("%s -cf archive1.tar file1 >test1.out 2>test1.err", testprog));
++	assertEqualInt(0, systemf("%s -cf archive1.tar file1 >test1.out 2>test1.err", testprog_ustar));
+ 	failure("bsdtar does not pad archives written directly to regular files");
+ 	assertFileSize("archive1.tar", 2048);
+ 	assertEmptyFile("test1.out");
+@@ -46,24 +52,24 @@ DEFINE_TEST(test_option_b)
+ 	 * Bsdtar does pad to the block size if the output is going to a socket.
+ 	 */
+ 	/* Default is -b 20 */
+-	assertEqualInt(0, systemf("%s -cf - file1 2>test2.err | cat >archive2.tar ", testprog));
++	assertEqualInt(0, systemf("%s -cf - file1 2>test2.err | cat >archive2.tar ", testprog_ustar));
+ 	failure("bsdtar does pad archives written to pipes");
+ 	assertFileSize("archive2.tar", 10240);
+ 	assertEmptyFile("test2.err");
+ 
+-	assertEqualInt(0, systemf("%s -cf - -b 20 file1 2>test3.err | cat >archive3.tar ", testprog));
++	assertEqualInt(0, systemf("%s -cf - -b 20 file1 2>test3.err | cat >archive3.tar ", testprog_ustar));
+ 	assertFileSize("archive3.tar", 10240);
+ 	assertEmptyFile("test3.err");
+ 
+-	assertEqualInt(0, systemf("%s -cf - -b 10 file1 2>test4.err | cat >archive4.tar ", testprog));
++	assertEqualInt(0, systemf("%s -cf - -b 10 file1 2>test4.err | cat >archive4.tar ", testprog_ustar));
+ 	assertFileSize("archive4.tar", 5120);
+ 	assertEmptyFile("test4.err");
+ 
+-	assertEqualInt(0, systemf("%s -cf - -b 1 file1 2>test5.err | cat >archive5.tar ", testprog));
++	assertEqualInt(0, systemf("%s -cf - -b 1 file1 2>test5.err | cat >archive5.tar ", testprog_ustar));
+ 	assertFileSize("archive5.tar", 2048);
+ 	assertEmptyFile("test5.err");
+ 
+-	assertEqualInt(0, systemf("%s -cf - -b 8192 file1 2>test6.err | cat >archive6.tar ", testprog));
++	assertEqualInt(0, systemf("%s -cf - -b 8192 file1 2>test6.err | cat >archive6.tar ", testprog_ustar));
+ 	assertFileSize("archive6.tar", 4194304);
+ 	assertEmptyFile("test6.err");
+