Replace execdrivers with containerd implementation

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>
Signed-off-by: Anusha Ragunathan <anusha@docker.com>
Upstream-commit: 9c4570a958df42d1ad19364b1a8da55b891d850a
Component: engine

components/engine/utils/process_unix.go

@@ -0,0 +1,22 @@
+// +build linux freebsd
+
+package utils
+
+import (
+	"syscall"
+)
+
+// IsProcessAlive returns true if process with a given pid is running.
+func IsProcessAlive(pid int) bool {
+	err := syscall.Kill(pid, syscall.Signal(0))
+	if err == nil || err == syscall.EPERM {
+		return true
+	}
+
+	return false
+}
+
+// KillProcess force-stops a process.
+func KillProcess(pid int) {
+	syscall.Kill(pid, syscall.SIGKILL)
+}

components/engine/utils/process_windows.go

@@ -0,0 +1,20 @@
+package utils
+
+// IsProcessAlive returns true if process with a given pid is running.
+func IsProcessAlive(pid int) bool {
+	// TODO Windows containerd. Not sure this is needed
+	//	p, err := os.FindProcess(pid)
+	//	if err == nil {
+	//		return true
+	//	}
+	return false
+}
+
+// KillProcess force-stops a process.
+func KillProcess(pid int) {
+	// TODO Windows containerd. Not sure this is needed
+	//	p, err := os.FindProcess(pid)
+	//	if err == nil {
+	//		p.Kill()
+	//	}
+}