tests/vm: use ssh with pty unconditionally

Allways ask ssh to run with a pseudo terminal.
Not having a terminal causes problems now and then.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Tested-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190617043858.8290-3-kraxel@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

tests/vm/basevm.py

@@ -108,16 +108,14 @@ def check_sha256sum(fname):
         os.rename(fname + ".download", fname)
         return fname
 
-    def _ssh_do(self, user, cmd, check, interactive=False):
-        ssh_cmd = ["ssh", "-q",
+    def _ssh_do(self, user, cmd, check):
+        ssh_cmd = ["ssh", "-q", "-t",
                    "-o", "StrictHostKeyChecking=no",
                    "-o", "UserKnownHostsFile=" + os.devnull,
                    "-o", "ConnectTimeout=1",
                    "-p", self.ssh_port, "-i", self._ssh_key_file]
         for var in self.envvars:
             ssh_cmd += ['-o', "SendEnv=%s" % var ]
-        if interactive:
-            ssh_cmd += ['-t']
         assert not isinstance(cmd, str)
         ssh_cmd += ["%s@127.0.0.1" % user] + list(cmd)
         logging.debug("ssh_cmd: %s", " ".join(ssh_cmd))
@@ -129,9 +127,6 @@ def _ssh_do(self, user, cmd, check, interactive=False):
     def ssh(self, *cmd):
         return self._ssh_do(self.GUEST_USER, cmd, False)
 
-    def ssh_interactive(self, *cmd):
-        return self._ssh_do(self.GUEST_USER, cmd, False, True)
-
     def ssh_root(self, *cmd):
         return self._ssh_do("root", cmd, False)
 
@@ -285,9 +280,9 @@ def main(vmcls):
         return 2
 
     if args.interactive:
-        if vm.ssh_interactive(*cmd) == 0:
+        if vm.ssh(*cmd) == 0:
             return 0
-        vm.ssh_interactive()
+        vm.ssh()
         return 3
     else:
         if vm.ssh(*cmd) != 0: