Stops container if gofer is killed

Each gofer now has a goroutine that polls on the FDs used
to communicate with the sandbox. The respective gofer is
destroyed if any of the FDs is closed.

Closes #601

PiperOrigin-RevId: 261383725

1 files changed, 11 insertions, 0 deletions

diff --git a/runsc/specutils/specutils.go b/runsc/specutils/specutils.go
index 0b40e38a3..2eec92349 100644
--- a/runsc/specutils/specutils.go
+++ b/runsc/specutils/specutils.go
@@ -492,3 +492,14 @@ func (c *Cleanup) Clean() {
 func (c *Cleanup) Release() {
 	c.clean = nil
 }
+
+// RetryEintr retries the function until an error different than EINTR is
+// returned.
+func RetryEintr(f func() (uintptr, uintptr, error)) (uintptr, uintptr, error) {
+	for {
+		r1, r2, err := f()
+		if err != syscall.EINTR {
+			return r1, r2, err
+		}
+	}
+}