tools/tesh/tesh.py

   1 #! @PYTHON_EXECUTABLE@
   2 # -*- coding: utf-8 -*-
   3 """
   4
   5 tesh -- testing shell
   6 ========================
   7
   8 Copyright (c) 2012-2021. The SimGrid Team. All rights reserved.
   9
  10 This program is free software; you can redistribute it and/or modify it
  11 under the terms of the license (GNU LGPL) which comes with this package.
  12
  13 #TODO: child of child of child that printfs. Does it work?
  14 #TODO: a child dies after its parent. What happen?
  15
  16 #TODO: regular expression in output
  17 #ex: >> Time taken: [0-9]+s
  18 #TODO: linked regular expression in output
  19 #ex:
  20 # >> Bytes sent: ([0-9]+)
  21 # >> Bytes recv: \1
  22 # then, even better:
  23 # ! expect (\1 > 500)
  24
  25 """
  26
  27 import sys
  28 import os
  29 import shlex
  30 import re
  31 import difflib
  32 import signal
  33 import argparse
  34 import time
  35
  36 if sys.version_info[0] == 3:
  37     import subprocess
  38     import _thread
  39 else:
  40     raise "This program is expected to run with Python3 only"
  41
  42 ##############
  43 #
  44 # Utilities
  45 #
  46 #
  47
  48 def isWindows():
  49     return sys.platform.startswith('win')
  50
  51 # Singleton metaclass that works in Python 2 & 3
  52 # http://stackoverflow.com/questions/6760685/creating-a-singleton-in-python
  53
  54 class _Singleton(type):
  55     """ A metaclass that creates a Singleton base class when called. """
  56     _instances = {}
  57
  58     def __call__(cls, *args, **kwargs):
  59         if cls not in cls._instances:
  60             cls._instances[cls] = super(_Singleton, cls).__call__(*args, **kwargs)
  61         return cls._instances[cls]
  62
  63 class Singleton(_Singleton('SingletonMeta', (object,), {})):
  64     pass
  65
  66 SIGNALS_TO_NAMES_DICT = dict((getattr(signal, n), n)
  67                              for n in dir(signal) if n.startswith('SIG') and '_' not in n)
  68
  69 return_code = 0
  70
  71 # exit correctly
  72 def tesh_exit(errcode):
  73     # If you do not flush some prints are skipped
  74     sys.stdout.flush()
  75     # os._exit exit even when executed within a thread
  76     os._exit(errcode)
  77
  78
  79 def fatal_error(msg):
  80     print("[Tesh/CRITICAL] " + str(msg))
  81     tesh_exit(1)
  82
  83
  84 # Set an environment variable.
  85 # arg must be a string with the format "variable=value"
  86 def setenv(arg):
  87     print("[Tesh/INFO] setenv " + arg)
  88     t = arg.split("=", 1)
  89     os.environ[t[0]] = t[1]
  90     # os.putenv(t[0], t[1]) does not work
  91     # see http://stackoverflow.com/questions/17705419/python-os-environ-os-putenv-usr-bin-env
  92
  93
  94 # http://stackoverflow.com/questions/30734967/how-to-expand-environment-variables-in-python-as-bash-does
  95 def expandvars2(path):
  96     return re.sub(r'(?<!\\)\$[A-Za-z_][A-Za-z0-9_]*', '', os.path.expandvars(path))
  97
  98
  99 # https://github.com/Cadair/jupyter_environment_kernels/issues/10
 100 try:
 101     FileNotFoundError
 102 except NameError:
 103     # py2
 104     FileNotFoundError = OSError
 105
 106 ##############
 107 #
 108 # Cleanup on signal
 109 #
 110 #
 111
 112 # Global variable. Stores which process group should be killed (or None otherwise)
 113 running_pids = list()
 114
 115 # Tests whether the process is dead already
 116 def process_is_dead(pid):
 117     try:
 118         os.kill(pid, 0)
 119     except ProcessLookupError:
 120         return True
 121     except OSError as err:
 122         if err.errno == errno.ESRCH: # ESRCH == No such process. The process is now dead
 123             return True
 124     return False
 125
 126 # This function send TERM signal + KILL signal after 0.2s to the group of the specified process
 127 def kill_process_group(pid):
 128     if pid is None:  # Nobody to kill. We don't know who to kill on windows, or we don't have anyone to kill on signal handler
 129         return
 130
 131     try:
 132         pgid = os.getpgid(pid)
 133     except:
 134         # os.getpgid failed. Ok, don't cleanup.
 135         return
 136
 137     try:
 138         os.killpg(pgid, signal.SIGTERM)
 139         if process_is_dead(pid):
 140             return
 141         time.sleep(0.2)
 142         os.killpg(pgid, signal.SIGKILL)
 143     except OSError:
 144         # os.killpg failed. OK. Some subprocesses may still be running.
 145         pass
 146
 147 def signal_handler(signal, frame):
 148     print("Caught signal {}".format(SIGNALS_TO_NAMES_DICT[signal]))
 149     global running_pids
 150     running_pids_copy = running_pids # Just in case of interthread conflicts.
 151     for pid in running_pids_copy:
 152         kill_process_group(pid)
 153     running_pids.clear()
 154     tesh_exit(5)
 155
 156
 157 ##############
 158 #
 159 # Classes
 160 #
 161 #
 162
 163
 164 # read file line per line (and concat line that ends with "\")
 165 class FileReader(Singleton):
 166     def __init__(self, filename=None):
 167         if filename is None:
 168             self.filename = "(stdin)"
 169             self.f = sys.stdin
 170         else:
 171             self.filename_raw = filename
 172             self.filename = os.path.basename(filename)
 173             self.abspath = os.path.abspath(filename)
 174             self.f = open(self.filename_raw)
 175
 176         self.linenumber = 0
 177
 178     def __repr__(self):
 179         return self.filename + ":" + str(self.linenumber)
 180
 181     def readfullline(self):
 182         try:
 183             line = next(self.f)
 184             self.linenumber += 1
 185         except StopIteration:
 186             return None
 187         if line[-1] == "\n":
 188             txt = line[0:-1]
 189         else:
 190             txt = line
 191         while len(line) > 1 and line[-2] == "\\":
 192             txt = txt[0:-1]
 193             line = next(self.f)
 194             self.linenumber += 1
 195             txt += line[0:-1]
 196         return txt
 197
 198
 199 # keep the state of tesh (mostly configuration values)
 200 class TeshState(Singleton):
 201     def __init__(self):
 202         self.threads = []
 203         self.args_suffix = ""
 204         self.ignore_regexps_common = []
 205         self.jenkins = False  # not a Jenkins run by default
 206         self.timeout = 10  # default value: 10 sec
 207         self.wrapper = None
 208         self.keep = False
 209
 210     def add_thread(self, thread):
 211         self.threads.append(thread)
 212
 213     def join_all_threads(self):
 214         for t in self.threads:
 215             t.acquire()
 216             t.release()
 217
 218 # Command line object
 219
 220
 221 class Cmd(object):
 222     def __init__(self):
 223         self.input_pipe = []
 224         self.output_pipe_stdout = []
 225         self.output_pipe_stderr = []
 226         self.timeout = TeshState().timeout
 227         self.args = None
 228         self.linenumber = -1
 229
 230         self.background = False
 231         # Python threads loose the cwd
 232         self.cwd = os.getcwd()
 233
 234         self.ignore_output = False
 235         self.expect_return = [0]
 236
 237         self.output_display = False
 238
 239         self.sort = -1
 240
 241         self.ignore_regexps = TeshState().ignore_regexps_common
 242
 243     def add_input_pipe(self, l):
 244         self.input_pipe.append(l)
 245
 246     def add_output_pipe_stdout(self, l):
 247         self.output_pipe_stdout.append(l)
 248
 249     def add_output_pipe_stderr(self, l):
 250         self.output_pipe_stderr.append(l)
 251
 252     def set_cmd(self, args, linenumber):
 253         self.args = args
 254         self.linenumber = linenumber
 255
 256     def add_ignore(self, txt):
 257         self.ignore_regexps.append(re.compile(txt))
 258
 259     def remove_ignored_lines(self, lines):
 260         for ign in self.ignore_regexps:
 261             lines = [l for l in lines if not ign.match(l)]
 262         return lines
 263
 264     def _cmd_mkfile(self, argline):
 265         filename = argline[len("mkfile "):]
 266         file = open(filename, "w")
 267         if file is None:
 268             fatal_error("Unable to create file " + filename)
 269         file.write("\n".join(self.input_pipe))
 270         file.write("\n")
 271         file.close()
 272
 273     def _cmd_cd(self, argline):
 274         args = shlex.split(argline)
 275         if len(args) != 2:
 276             fatal_error("Too many arguments to cd")
 277         try:
 278             os.chdir(args[1])
 279             print("[Tesh/INFO] change directory to " + args[1])
 280         except FileNotFoundError:
 281             print("Chdir to " + args[1] + " failed: No such file or directory")
 282             print("Test suite `" + FileReader().filename + "': NOK (system error)")
 283             tesh_exit(4)
 284
 285     # Run the Cmd if possible.
 286     # Return False if nothing has been ran.
 287
 288     def run_if_possible(self):
 289         if self.can_run():
 290             if self.background:
 291                 lock = _thread.allocate_lock()
 292                 lock.acquire()
 293                 TeshState().add_thread(lock)
 294                 _thread.start_new_thread(Cmd._run, (self, lock))
 295             else:
 296                 self._run()
 297             return True
 298         else:
 299             return False
 300
 301     def _run(self, lock=None):
 302         # Python threads loose the cwd
 303         os.chdir(self.cwd)
 304
 305         # retrocompatibility: support ${aaa:=.} variable format
 306         def replace_perl_variables(m):
 307             vname = m.group(1)
 308             vdefault = m.group(2)
 309             if vname in os.environ:
 310                 return "$" + vname
 311             return vdefault
 312
 313         self.args = re.sub(r"\${(\w+):=([^}]*)}", replace_perl_variables, self.args)
 314
 315         # replace bash environment variables ($THINGS) to their values
 316         self.args = expandvars2(self.args)
 317
 318         if re.match("^mkfile ", self.args) is not None:
 319             self._cmd_mkfile(self.args)
 320             if lock is not None:
 321                 lock.release()
 322             return
 323
 324         if re.match("^cd ", self.args) is not None:
 325             self._cmd_cd(self.args)
 326             if lock is not None:
 327                 lock.release()
 328             return
 329
 330         if TeshState().wrapper is not None:
 331             self.timeout *= 20
 332             self.args = TeshState().wrapper + self.args
 333         elif re.match(".*smpirun.*", self.args) is not None:
 334             self.args = "sh " + self.args
 335         if TeshState().jenkins and self.timeout is not None:
 336             self.timeout *= 10
 337
 338         self.args += TeshState().args_suffix
 339
 340         logs = list()
 341         logs.append("[{file}:{number}] {args}".format(file=FileReader().filename,
 342             number=self.linenumber, args=self.args))
 343
 344         args = shlex.split(self.args)
 345
 346         global running_pids
 347         local_pid = None
 348         global return_code
 349
 350         try:
 351             preexec_function = None
 352             if not isWindows():
 353                 preexec_function = lambda: os.setpgid(0, 0)
 354             proc = subprocess.Popen(
 355                 args,
 356                 bufsize=1,
 357                 stdin=subprocess.PIPE,
 358                 stdout=subprocess.PIPE,
 359                 stderr=subprocess.STDOUT,
 360                 universal_newlines=True,
 361                 preexec_fn=preexec_function)
 362             if not isWindows():
 363                 local_pid = proc.pid
 364                 running_pids.append(local_pid)
 365         except PermissionError:
 366             logs.append("[{file}:{number}] Cannot start '{cmd}': The binary is not executable.".format(
 367                 file=FileReader().filename, number=self.linenumber, cmd=args[0]))
 368             logs.append("[{file}:{number}] Current dir: {dir}".format(file=FileReader().filename,
 369                 number=self.linenumber, dir=os.getcwd()))
 370             return_code = max(3, return_code)
 371             print('\n'.join(logs))
 372             return
 373         except NotADirectoryError:
 374             logs.append("[{file}:{number}] Cannot start '{cmd}': The path to binary does not exist.".format(
 375                 file=FileReader().filename, number=self.linenumber, cmd=args[0]))
 376             logs.append("[{file}:{number}] Current dir: {dir}".format(file=FileReader().filename,
 377                 number=self.linenumber, dir=os.getcwd()))
 378             return_code = max(3, return_code)
 379             print('\n'.join(logs))
 380             return
 381         except FileNotFoundError:
 382             logs.append("[{file}:{number}] Cannot start '{cmd}': File not found.".format(
 383                 file=FileReader().filename, number=self.linenumber, cmd=args[0]))
 384             return_code = max(3, return_code)
 385             print('\n'.join(logs))
 386             return
 387         except OSError as osE:
 388             if osE.errno == 8:
 389                 osE.strerror += "\nOSError: [Errno 8] Executed scripts should start with shebang line (like #!/usr/bin/env sh)"
 390             raise osE
 391
 392         cmdName = FileReader().filename + ":" + str(self.linenumber)
 393         try:
 394             (stdout_data, stderr_data) = proc.communicate("\n".join(self.input_pipe), self.timeout)
 395             local_pid = None
 396             timeout_reached = False
 397         except subprocess.TimeoutExpired:
 398             timeout_reached = True
 399             logs.append("Test suite `{file}': NOK (<{cmd}> timeout after {timeout} sec)".format(
 400                 file=FileReader().filename, cmd=cmdName, timeout=self.timeout))
 401             running_pids.remove(local_pid)
 402             kill_process_group(local_pid)
 403             # Try to get the output of the timeout process, to help in debugging.
 404             try:
 405                 (stdout_data, stderr_data) = proc.communicate(timeout=1)
 406             except subprocess.TimeoutExpired:
 407                 logs.append("[{file}:{number}] Could not retrieve output. Killing the process group failed?".format(
 408                     file=FileReader().filename, number=self.linenumber))
 409                 return_code = max(3, return_code)
 410                 print('\n'.join(logs))
 411                 return
 412
 413         if self.output_display:
 414             logs.append(str(stdout_data))
 415
 416         # remove text colors
 417         ansi_escape = re.compile(r'\x1b[^m]*m')
 418         stdout_data = ansi_escape.sub('', stdout_data)
 419
 420         if self.ignore_output:
 421             logs.append("(ignoring the output of <{cmd}> as requested)".format(cmd=cmdName))
 422         else:
 423             stdouta = stdout_data.split("\n")
 424             while stdouta and stdouta[-1] == "":
 425                 del stdouta[-1]
 426             stdouta = self.remove_ignored_lines(stdouta)
 427             stdcpy = stdouta[:]
 428
 429             # Mimic the "sort" bash command, which is case unsensitive.
 430             if self.sort == 0:
 431                 stdouta.sort(key=lambda x: x.lower())
 432                 self.output_pipe_stdout.sort(key=lambda x: x.lower())
 433             elif self.sort > 0:
 434                 stdouta.sort(key=lambda x: x[:self.sort].lower())
 435                 self.output_pipe_stdout.sort(key=lambda x: x[:self.sort].lower())
 436
 437             diff = list(
 438                 difflib.unified_diff(
 439                     self.output_pipe_stdout,
 440                     stdouta,
 441                     lineterm="",
 442                     fromfile='expected',
 443                     tofile='obtained'))
 444             if diff:
 445                 logs.append("Output of <{cmd}> mismatch:".format(cmd=cmdName))
 446                 if self.sort >= 0:  # If sorted, truncate the diff output and show the unsorted version
 447                     difflen = 0
 448                     for line in diff:
 449                         if difflen < 50:
 450                             print(line)
 451                         difflen += 1
 452                     if difflen > 50:
 453                         logs.append("(diff truncated after 50 lines)")
 454                     logs.append("Unsorted observed output:\n")
 455                     for line in stdcpy:
 456                         logs.append(line)
 457                 else:  # If not sorted, just display the diff
 458                     for line in diff:
 459                         logs.append(line)
 460
 461                 logs.append("Test suite `{file}': NOK (<{cmd}> output mismatch)".format(
 462                     file=FileReader().filename, cmd=cmdName))
 463                 if lock is not None:
 464                     lock.release()
 465                 if TeshState().keep:
 466                     f = open('obtained', 'w')
 467                     obtained = stdout_data.split("\n")
 468                     while obtained and obtained[-1] == "":
 469                         del obtained[-1]
 470                     obtained = self.remove_ignored_lines(obtained)
 471                     for line in obtained:
 472                         f.write("> " + line + "\n")
 473                     f.close()
 474                     logs.append("Obtained output kept as requested: {path}".format(path=os.path.abspath("obtained")))
 475                 return_code = max(2, return_code)
 476                 print('\n'.join(logs))
 477                 return
 478
 479         if timeout_reached:
 480             return_code = max(3, return_code)
 481             print('\n'.join(logs))
 482             return
 483
 484         if not proc.returncode in self.expect_return:
 485             if proc.returncode >= 0:
 486                 logs.append("Test suite `{file}': NOK (<{cmd}> returned code {code})".format(
 487                     file=FileReader().filename, cmd=cmdName, code=proc.returncode))
 488                 if lock is not None:
 489                     lock.release()
 490                 return_code = max(2, return_code)
 491                 print('\n'.join(logs))
 492                 return
 493             else:
 494                 logs.append("Test suite `{file}': NOK (<{cmd}> got signal {sig})".format(
 495                     file=FileReader().filename, cmd=cmdName,
 496                     sig=SIGNALS_TO_NAMES_DICT[-proc.returncode]))
 497                 if lock is not None:
 498                     lock.release()
 499                 return_code = max(max(-proc.returncode, 1), return_code)
 500                 print('\n'.join(logs))
 501                 return
 502
 503         if lock is not None:
 504             lock.release()
 505
 506         print('\n'.join(logs))
 507
 508     def can_run(self):
 509         return self.args is not None
 510
 511 ##############
 512 #
 513 # Main
 514 #
 515 #
 516
 517 if __name__ == '__main__':
 518     signal.signal(signal.SIGINT, signal_handler)
 519     signal.signal(signal.SIGTERM, signal_handler)
 520
 521     parser = argparse.ArgumentParser(description='tesh -- testing shell')
 522     group1 = parser.add_argument_group('Options')
 523     group1.add_argument('teshfile', nargs='?', help='Name of teshfile, stdin if omitted')
 524     group1.add_argument(
 525         '--cd',
 526         metavar='some/directory',
 527         help='ask tesh to switch the working directory before launching the tests')
 528     group1.add_argument('--setenv', metavar='var=value', action='append', help='set a specific environment variable')
 529     group1.add_argument('--cfg', metavar='arg', action='append', help='add parameter --cfg=arg to each command line')
 530     group1.add_argument('--log', metavar='arg', action='append', help='add parameter --log=arg to each command line')
 531     group1.add_argument(
 532         '--ignore-jenkins',
 533         action='store_true',
 534         help='ignore all cruft generated on SimGrid continuous integration servers')
 535     group1.add_argument('--wrapper', metavar='arg', help='Run each command in the provided wrapper (eg valgrind)')
 536     group1.add_argument(
 537         '--keep',
 538         action='store_true',
 539         help='Keep the obtained output when it does not match the expected one')
 540
 541     options = parser.parse_args()
 542
 543     if options.cd is not None:
 544         print("[Tesh/INFO] change directory to " + options.cd)
 545         os.chdir(options.cd)
 546
 547     if options.ignore_jenkins:
 548         print("Ignore all cruft seen on SimGrid's continuous integration servers")
 549         # Note: regexps should match at the beginning of lines
 550         TeshState().ignore_regexps_common = [
 551             re.compile(r"profiling:"),
 552             re.compile(r"Unable to clean temporary file C:"),
 553             re.compile(r".*Configuration change: Set 'contexts/"),
 554             re.compile(r"Picked up JAVA_TOOL_OPTIONS: "),
 555             re.compile(r"Picked up _JAVA_OPTIONS: "),
 556             re.compile(r"==[0-9]+== ?WARNING: ASan doesn't fully support"),
 557             re.compile(r"==[0-9]+== ?WARNING: ASan is ignoring requested __asan_handle_no_return: stack top:"),
 558             re.compile(r"False positive error reports may follow"),
 559             re.compile(r"For details see http://code\.google\.com/p/address-sanitizer/issues/detail\?id=189"),
 560             re.compile(r"For details see https://github\.com/google/sanitizers/issues/189"),
 561             re.compile(r"Python runtime initialized with LC_CTYPE=C .*"),
 562             # Seen on CircleCI
 563             re.compile(r"cmake: /usr/local/lib/libcurl\.so\.4: no version information available \(required by cmake\)"),
 564             re.compile(r".*mmap broken on FreeBSD, but dlopen\+thread broken too\. Switching to dlopen\+raw contexts\."),
 565             re.compile(r".*dlopen\+thread broken on Apple and BSD\. Switching to raw contexts\."),
 566         ]
 567         TeshState().jenkins = True  # This is a Jenkins build
 568
 569     if options.teshfile is None:
 570         f = FileReader(None)
 571         print("Test suite from stdin")
 572     else:
 573         if not os.path.isfile(options.teshfile):
 574             print("Cannot open teshfile '" + options.teshfile + "': File not found")
 575             tesh_exit(3)
 576         f = FileReader(options.teshfile)
 577         print("Test suite '" + f.abspath + "'")
 578
 579     if options.setenv is not None:
 580         for e in options.setenv:
 581             setenv(e)
 582
 583     if options.cfg is not None:
 584         for c in options.cfg:
 585             TeshState().args_suffix += " --cfg=" + c
 586     if options.log is not None:
 587         for l in options.log:
 588             TeshState().args_suffix += " --log=" + l
 589
 590     if options.wrapper is not None:
 591         TeshState().wrapper = options.wrapper
 592
 593     if options.keep:
 594         TeshState().keep = True
 595
 596     # cmd holds the current command line
 597     # tech commands will add some parameters to it
 598     # when ready, we execute it.
 599     cmd = Cmd()
 600
 601     line = f.readfullline()
 602     while line is not None:
 603         # print(">>============="+line+"==<<")
 604         if not line:
 605             #print ("END CMD block")
 606             if cmd.run_if_possible():
 607                 cmd = Cmd()
 608
 609         elif line[0] == "#":
 610             pass
 611
 612         elif line[0:2] == "p ":
 613             print("[" + str(FileReader()) + "] " + line[2:])
 614
 615         elif line[0:2] == "< ":
 616             cmd.add_input_pipe(line[2:])
 617         elif line[0:1] == "<":
 618             cmd.add_input_pipe(line[1:])
 619
 620         elif line[0:2] == "> ":
 621             cmd.add_output_pipe_stdout(line[2:])
 622         elif line[0:1] == ">":
 623             cmd.add_output_pipe_stdout(line[1:])
 624
 625         elif line[0:2] == "$ ":
 626             if cmd.run_if_possible():
 627                 cmd = Cmd()
 628             cmd.set_cmd(line[2:], f.linenumber)
 629
 630         elif line[0:2] == "& ":
 631             if cmd.run_if_possible():
 632                 cmd = Cmd()
 633             cmd.set_cmd(line[2:], f.linenumber)
 634             cmd.background = True
 635
 636         elif line[0:15] == "! output ignore":
 637             cmd.ignore_output = True
 638             #print("cmd.ignore_output = True")
 639         elif line[0:16] == "! output display":
 640             cmd.output_display = True
 641             cmd.ignore_output = True
 642         elif line[0:15] == "! expect return":
 643             cmd.expect_return = [int(line[16:])]
 644             #print("expect return "+str(int(line[16:])))
 645         elif line[0:15] == "! expect signal":
 646             cmd.expect_return = []
 647             for sig in (line[16:]).split("|"):
 648                 # get the signal integer value from the signal module
 649                 if sig not in signal.__dict__:
 650                     fatal_error("unrecognized signal '" + sig + "'")
 651                 sig = int(signal.__dict__[sig])
 652                 # popen return -signal when a process ends with a signal
 653                 cmd.expect_return.append(-sig)
 654         elif line[0:len("! timeout ")] == "! timeout ":
 655             if "no" in line[len("! timeout "):]:
 656                 cmd.timeout = None
 657             else:
 658                 cmd.timeout = int(line[len("! timeout "):])
 659
 660         elif line[0:len("! output sort")] == "! output sort":
 661             if len(line) >= len("! output sort "):
 662                 sort = int(line[len("! output sort "):])
 663             else:
 664                 sort = 0
 665             cmd.sort = sort
 666         elif line[0:len("! setenv ")] == "! setenv ":
 667             setenv(line[len("! setenv "):])
 668
 669         elif line[0:len("! ignore ")] == "! ignore ":
 670             cmd.add_ignore(line[len("! ignore "):])
 671
 672         else:
 673             fatal_error("UNRECOGNIZED OPTION")
 674
 675         line = f.readfullline()
 676
 677     cmd.run_if_possible()
 678
 679     TeshState().join_all_threads()
 680
 681     if return_code == 0:
 682         if f.filename == "(stdin)":
 683             print("Test suite from stdin OK")
 684         else:
 685             print("Test suite `" + f.filename + "' OK")
 686     else:
 687         tesh_exit(return_code)