[Bug 6680] New: cpio does not understand hardlinks in archives

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=6680

           Summary: cpio does not understand hardlinks in archives
           Product: Busybox
           Version: 1.21.x
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: Standard Compliance
        AssignedTo: unassigned at busybox.net
        ReportedBy: mjt+busybox at tls.msk.ru
                CC: busybox-cvs at busybox.net
   Estimated Hours: 0.0


When running testsuite, one of the "known-buggy" testcases fails:

 FAIL: cpio lists hardlinks

but the reason why it fails is not due to difference between "1 block" vs "1
blocks" output as stated in the test, but because of an actual bug:

echo -ne '' | echo -ne
'\x42\x5a\x68\x39\x31\x41\x59\x26\x53\x59\x64\x1e\x91\x8c\x00\x00\x48\x7f\x80\x4c\x48\x08\x00\x28\x01\xff\xe0\x3f\x24\x14\x00\x0e\x20\xdc\x60\x20\x00\x92\x11\xea\xa0\x1a\x00\x00\x00\x03\x20\x8a\x93\xd4\x9a\x68\x1a\x0d\x1e\x91\xa1\xa0\x06\x98\xe3\x5c\x2f\xd9\x26\xa1\x25\x24\x20\xed\x47\xc7\x21\x40\x2b\x6e\xf2\xe6\xfe\x98\x13\x68\xa8\xbd\x82\xb2\x4f\x26\x02\x24\x16\x5b\x22\x16\x72\x74\x15\xcd\xc1\xa6\x9e\xa6\x5e\x6c\x16\x37\x35\x01\x99\xc4\x81\x21\x29\x28\x4b\x69\x51\xa9\x3c\x1a\x9b\x0a\xe1\xe4\xb4\xaf\x85\x73\xba\x23\x10\x59\xe8\xb3\xe1\xa1\x63\x05\x8c\x4f\xc5\xdc\x91\x4e\x14\x24\x19\x07\xa4\x63\x00'
| bzcat | cpio -t 2>&1; echo $?
FAIL: cpio lists hardlinks
--- expected
+++ actual
@@ -1,5 +1,3 @@
-cpio.testdir
-cpio.testdir/x
-cpio.testdir/y
 1 blocks
+cpio.testdir
 0

So, busybox cpio only displays the first entry from this cpio archive, while
there are 2 more entries exists!

The good news is that those entries are actually processed, just not printed
(including -idv mode -- busybox cpio actually extracts the files, but does not
display their names).

But still marking this issue as "normal" severity not "minor", even this is
only display issue: it costed me almost a heart attack when I thought some
files weren't extracted... :)

Thanks,

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