runsc: Enable waiting on exited processes.

This makes `runsc wait` behave more like waitpid()/wait4() in that:
- Once a process has run to completion, you can wait on it and get its exit
  code.
- Processes not waited on will consume memory (like a zombie process)

PiperOrigin-RevId: 213358916
Change-Id: I5b5eca41ce71eea68e447380df8c38361a4d1558

1 files changed, 4 insertions, 4 deletions

diff --git a/runsc/container/container.go b/runsc/container/container.go
index 792b7967b..a24c6cc31 100644
--- a/runsc/container/container.go
+++ b/runsc/container/container.go
@@ -398,22 +398,22 @@ func (c *Container) Wait() (syscall.WaitStatus, error) {
 
 // WaitRootPID waits for process 'pid' in the sandbox's PID namespace and
 // returns its WaitStatus.
-func (c *Container) WaitRootPID(pid int32) (syscall.WaitStatus, error) {
+func (c *Container) WaitRootPID(pid int32, clearStatus bool) (syscall.WaitStatus, error) {
 	log.Debugf("Wait on pid %d in sandbox %q", pid, c.Sandbox.ID)
 	if c.Sandbox == nil || !c.Sandbox.IsRunning() {
 		return 0, fmt.Errorf("container sandbox is not running")
 	}
-	return c.Sandbox.WaitPID(pid, c.Sandbox.ID)
+	return c.Sandbox.WaitPID(c.Sandbox.ID, pid, clearStatus)
 }
 
 // WaitPID waits for process 'pid' in the container's PID namespace and returns
 // its WaitStatus.
-func (c *Container) WaitPID(pid int32) (syscall.WaitStatus, error) {
+func (c *Container) WaitPID(pid int32, clearStatus bool) (syscall.WaitStatus, error) {
 	log.Debugf("Wait on pid %d in container %q", pid, c.ID)
 	if c.Sandbox == nil || !c.Sandbox.IsRunning() {
 		return 0, fmt.Errorf("container sandbox is not running")
 	}
-	return c.Sandbox.WaitPID(pid, c.ID)
+	return c.Sandbox.WaitPID(c.ID, pid, clearStatus)
 }
 
 // Signal sends the signal to the container.