test: check restoring external fifo-s

Signed-off-by: Andrew Vagin <avagin@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

test/inhfd/fifo.py

@@ -0,0 +1,35 @@
+import os, tempfile
+
+id_str = ""
+
+def create_fds():
+	tdir = tempfile.mkdtemp("zdtm.inhfd.XXXXXX")
+	if os.system("mount -t tmpfs zdtm.inhfd %s" % tdir) != 0:
+		raise Exception("Unable to mount tmpfs")
+	tfifo = os.path.join(tdir, "test_fifo")
+	os.mkfifo(tfifo)
+	fd2 = open(tfifo, "w+")
+	fd1 = open(tfifo, "r")
+	os.system("umount -l %s" % tdir)
+	os.rmdir(tdir)
+
+	mnt_id = -1;
+	f = open("/proc/self/fdinfo/%d" % fd1.fileno())
+	for l in f:
+		l = l.split()
+		if l[0] == "mnt_id:":
+			mnt_id = int(l[1])
+			break
+	else:
+		raise Exception("Unable to find mnt_id")
+
+	global id_str
+	id_str = "file[%x:%x]" % (mnt_id, os.fstat(fd1.fileno()).st_ino)
+
+	return (fd2, fd1)
+
+def filename(pipef):
+	return id_str
+
+def dump_opts(sockf):
+	return [ "--external", id_str ]

test/inhfd/fifo.py.desc

@@ -0,0 +1 @@
+{ 'flavor': 'h' }