[CRIU] [PATCH 02/32] pie: restorer -- Don't fail if no futex provided

[Cyrill Gorcunov]

The image data may have no futex provided but our
futex data is declared as "required" in protobuf
file.

Thus to make it optional we have two ways

 - either fix up proto file itself
 - either check for futex data value(s) and figure
   out if data is deliberately has inacceptable value
   which can be treated as a sign that we may ignore it

The second way is simplier and requires less code to bring
into crtools codebase.

This patch adds a check for futex length (which can't ever
be zero for valid data) and if zero met -- we simply ignore
such futex and don't restore it.

This is because OpenVZ image might have no futex data
checkpointed and we are to be ready for that.

Signed-off-by: Cyrill Gorcunov <gorcunov at openvz.org>
---
 pie/restorer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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