Sorry I see I've missed a `touch /test/.x` in the bugreport.
The test case is really simple:
% busybox sh
BusyBox v1.22.1 (Debian 1:1.22.0-8) built-in shell (ash)
Enter 'help' for a list of built-in commands.
~ $ mkdir /tmp/emptytest
~ $ touch /tmp/emptytest/.x
~ $ find /tmp/emptytest/ -name "*?" | dd count=1 2>/dev/null
/tmp/emptytest/
~ $ find /tmp/emptytest/ -name "*?" | dd count=1 2>/dev/null
/tmp/emptytest/
~ $ find /tmp/emptytest/ -name "*?" | dd count=1 2>/dev/null
/tmp/emptytest/
/tmp/emptytest/.x
~ $ find /tmp/emptytest/ -name "*?" | dd count=1 2>/dev/null
/tmp/emptytest/
~ $ find /tmp/emptytest/ -name "*?" | dd count=1 2>/dev/null
/tmp/emptytest/
/tmp/emptytest/.x
~ $ find /tmp/emptytest/ -name "*?" | dd count=1 2>/dev/null
/tmp/emptytest/
~ $ find /tmp/emptytest/ -name "*?" | dd count=1 2>/dev/null
/tmp/emptytest/
/tmp/emptytest/.x
The output should be always:
/tmp/emptytest/
/tmp/emptytest/.x
Assuming dd block size default to 512.
Notice that omitting count or in pipe with cat it work properly.
I guess something wrong on how dd close the pipe or find handle
broken pipes.
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