validate: add Hooks validation

Signed-off-by: Ma Shimiao <mashimiao.fnst@cn.fujitsu.com>

validate.go

@@ -85,6 +85,7 @@ func bundleValidate(spec rspec.Spec, rootfs string) {
 	checkSemVer(spec.Version)
 	checkProcess(spec.Process, rootfs)
 	checkMounts(spec.Mounts, rootfs)
+	checkHooks(spec.Hooks, rootfs)
 	checkLinux(spec.Linux, rootfs)
 }
 
@@ -106,6 +107,29 @@ func checkMounts(mounts []rspec.Mount, rootfs string) {
 	}
 }
 
+func checkHooks(process rspec.Hooks, rootfs string) {
+	for _, prestart := range process.Prestart {
+		binPath := path.Join(rootfs, prestart.Path)
+		if _, err := os.Stat(binPath); err != nil {
+			logrus.Fatalf("Cannot find pre-start hook: %v", binPath)
+		}
+	}
+
+	for _, poststart := range process.Poststart {
+		binPath := path.Join(rootfs, poststart.Path)
+		if _, err := os.Stat(binPath); err != nil {
+			logrus.Fatalf("Cannot find post-start hook: %v", binPath)
+		}
+	}
+
+	for _, poststop := range process.Poststop {
+		binPath := path.Join(rootfs, poststop.Path)
+		if _, err := os.Stat(binPath); err != nil {
+			logrus.Fatalf("Cannot find post-stop hook: %v", binPath)
+		}
+	}
+}
+
 func checkProcess(process rspec.Process, rootfs string) {
 	for index := 0; index < len(process.Capabilities); index++ {
 		capability := process.Capabilities[index]