criu-ns: Add tests for criu-ns script (WIP)

These changes add test implementations for criu-ns script.

Fixes: #1909

Signed-off-by: Dhanuka Warusadura <csx@tuta.io>

test/others/criu-ns/Makefile

@@ -0,0 +1,2 @@
+run:
+	../../zdtm_ct run.py

test/others/criu-ns/run.py

@@ -0,0 +1,81 @@
+#!/usr/bin/env python
+
+import os
+import shutil
+import signal
+import subprocess
+import sys
+
+CR_NS = "../../.././scripts/criu-ns"
+
+os.chdir(os.getcwd())
+
+
+def check_dumpdir():
+    if os.access("dumpdir", os.X_OK):
+        shutil.rmtree("dumpdir")
+        os.mkdir("dumpdir", 0o755)
+
+
+check_dumpdir()
+
+# dump with --shell-job
+cmd = ["sleep", "inf"]
+print("Run: %s" % " ".join(cmd))
+pid = subprocess.Popen(cmd).pid
+cmd = [CR_NS, "dump", "-D", "dumpdir", "-v4", "-o", "dump.log",
+       "--shell-job", "-t", str(pid)]
+ret = subprocess.Popen(cmd).wait()
+if ret != 0:
+    os.kill(pid, signal.SIGTERM)
+    sys.exit(ret)
+
+# restore with --shell-job
+cmd = [CR_NS, "restore", "-D", "dumpdir", "-v4", "-o", "restore.log",
+       "--shell-job"]
+ret = subprocess.Popen(cmd).wait()
+if ret != 0:
+    sys.exit(ret)
+
+check_dumpdir()
+
+# dump without --shell-job
+cmd = ["setsid", "./test.sh"]
+print("Run: %s" % " ".join(cmd))
+pid = subprocess.Popen(cmd, stdin=subprocess.DEVNULL,
+                       stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL).pid
+cmd = [CR_NS, "dump", "-D", "dumpdir", "-v4", "-o", "dump.log",
+       "-t", str(pid)]
+ret = subprocess.Popen(cmd).wait()
+if ret != 0:
+    os.kill(pid, signal.SIGTERM)
+    sys.exit(ret)
+
+# restore without --shell-job
+cmd = [CR_NS, "restore", "-D", "dumpdir", "-v4", "-o", "restore.log"]
+ret = subprocess.Popen(cmd).wait()
+if ret != 0:
+    sys.exit(ret)
+
+check_dumpdir()
+
+# dump to test with --restore-detached
+cmd = ["setsid", "./test.sh"]
+print("Run: %s" % " ".join(cmd))
+pid = subprocess.Popen(cmd, stdin=subprocess.DEVNULL,
+                       stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL).pid
+cmd = [CR_NS, "dump", "-D", "dumpdir", "-v4", "-o", "dump.log",
+       "-t", str(pid)]
+ret = subprocess.Popen(cmd).wait()
+if ret != 0:
+    os.kill(pid, signal.SIGTERM)
+    sys.exit(ret)
+
+# restore with --restore-detached
+cmd = [CR_NS, "restore", "-D", "dumpdir", "-v4", "-o", "restore.log",
+       "--restore-detached"]
+ret = subprocess.Popen(cmd).wait()
+if ret != 0:
+    sys.exit(ret)
+
+sys.exit(0)

test/others/criu-ns/test.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+while :; do
+  sleep 1
+  date
+done
+EOF