def destroy_cache(self):
"""Completely remove and destroy the cache.
Nothing that could have been created by this object will be
left on disk. After that, this instance isn't usable anymore.
"""
rmtree(self.file_dir)
def delete(self):
"""Delete the directory where the sandbox operated.
"""
logger.debug("Deleting sandbox in %s" % self.path)
# Delete the working directory.
rmtree(self.path)
def delete(self):
"""Delete the directory where the sandbox operated.
"""
logger.debug("Deleting sandbox in %s.", self.path)
# Delete the working directory.
rmtree(self.path)
def destroy_cache(self):
"""Completely remove and destroy the cache.
Nothing that could have been created by this object will be
left on disk. After that, this instance isn't usable anymore.
"""
rmtree(self.file_dir)
def delete(self):
"""Delete the directory where the sandbox operated.
"""
logger.debug("Deleting sandbox in %s" % self.path)
# Tell isolate to cleanup the sandbox.
box_cmd = [self.box_exec] + (["--cg"] if self.cgroup else []) + ["--box-id=%d" % self.box_id]
subprocess.call(box_cmd + ["--cleanup"])
# Delete the working directory.
rmtree(self.outer_temp_dir)
def delete(self):
"""Delete the directory where the sandbox operated.
"""
logger.debug("Deleting sandbox in %s.", self.path)
# Tell isolate to cleanup the sandbox.
if not self._has_cleanedup:
self.cleanup()
# Delete the working directory.
rmtree(self.outer_temp_dir)
def delete(self):
"""Delete the directory where the sandbox operated.
"""
logger.debug("Deleting sandbox in %s.", self.path)
# Tell isolate to cleanup the sandbox.
box_cmd = [self.box_exec] + (["--cg"] if self.cgroup else []) \
+ ["--box-id=%d" % self.box_id]
subprocess.call(box_cmd + ["--cleanup"])
# Delete the working directory.
rmtree(self.outer_temp_dir)
def __init__(self, service=None, path=None, null=False):
"""Initialize.
By default the database-powered backend will be used, but this
can be changed using the parameters.
service (Service|None): the service we are running for. Only
used if present to determine the location of the
file-system cache (and to provide the shard number to the
Sandbox... sigh!).
path (string|None): if specified, back the FileCacher with a
file system-based storage instead of the default
database-based one. The specified directory will be used
as root for the storage and it will be created if it
doesn't exist.
null (bool): if True, back the FileCacher with a NullBackend,
that just discards every file it receives. This setting
takes priority over path.
"""
self.service = service
if null:
self.backend = NullBackend()
elif path is None:
self.backend = DBBackend()
else:
self.backend = FSBackend(path)
if service is None:
self.file_dir = tempfile.mkdtemp(dir=config.temp_dir)
# Delete this directory on exit since it has a random name and
# won't be used again.
atexit.register(lambda: rmtree(self.file_dir))
else:
self.file_dir = os.path.join(
config.cache_dir,
"fs-cache-%s-%d" % (service.name, service.shard))
self.temp_dir = os.path.join(self.file_dir, "_temp")
if not mkdir(config.cache_dir) or not mkdir(config.temp_dir) \
or not mkdir(self.file_dir) or not mkdir(self.temp_dir):
logger.error("Cannot create necessary directories.")
raise RuntimeError("Cannot create necessary directories.")
atexit.register(lambda: rmtree(self.temp_dir))
def execute(self, entry):
"""Print a print job.
This is the core of PrintingService.
entry (QueueEntry): the entry containing the operation to
perform.
"""
# TODO: automatically re-enqueue in case of a recoverable
# error.
printjob_id = entry.item.printjob_id
with SessionGen() as session:
# Obtain print job.
printjob = PrintJob.get_from_id(printjob_id, session)
if printjob is None:
raise ValueError("Print job %d not found in the database." %
printjob_id)
user = printjob.participation.user
contest = printjob.participation.contest
timezone = get_timezone(user, contest)
timestr = format_datetime(printjob.timestamp, timezone)
filename = printjob.filename
# Check if it's ready to be printed.
if printjob.done:
logger.info("Print job %d was already sent to the printer.",
printjob_id)
directory = tempfile.mkdtemp(dir=config.temp_dir)
logger.info("Preparing print job in directory %s", directory)
# Take the base name just to be sure.
relname = "source_" + os.path.basename(filename)
source = os.path.join(directory, relname)
with open(source, "wb") as file_:
self.file_cacher.get_file_to_fobj(printjob.digest, file_)
if filename.endswith(".pdf") and config.pdf_printing_allowed:
source_pdf = source
else:
# Convert text to ps.
source_ps = os.path.join(directory, "source.ps")
cmd = ["a2ps",
source,
"--delegate=no",
"--output=" + source_ps,
"--medium=%s" % config.paper_size.capitalize(),
"--portrait",
"--columns=1",
"--rows=1",
"--pages=1-%d" % (config.max_pages_per_job),
"--header=",
"--footer=",
"--left-footer=",
"--right-footer=",
"--center-title=" + filename,
"--left-title=" + timestr]
ret = subprocess.call(cmd, cwd=directory)
if ret != 0:
raise Exception(
"Failed to convert text file to ps with command: %s"
"(error %d)" % (pretty_print_cmdline(cmd), ret))
if not os.path.exists(source_ps):
logger.warning("Unable to convert from text to ps.")
printjob.done = True
printjob.status = json.dumps([
N_("Invalid file")])
session.commit()
rmtree(directory)
return
# Convert ps to pdf
source_pdf = os.path.join(directory, "source.pdf")
cmd = ["ps2pdf",
"-sPAPERSIZE=%s" % config.paper_size.lower(),
source_ps]
ret = subprocess.call(cmd, cwd=directory)
if ret != 0:
raise Exception(
"Failed to convert ps file to pdf with command: %s"
"(error %d)" % (pretty_print_cmdline(cmd), ret))
# Find out number of pages
with open(source_pdf, "rb") as file_:
pdfreader = PdfFileReader(file_)
page_count = pdfreader.getNumPages()
logger.info("Preparing %d page(s) (plus the title page)",
page_count)
if page_count > config.max_pages_per_job:
logger.info("Too many pages.")
printjob.done = True
printjob.status = json.dumps([
N_("Print job has too many pages")])
session.commit()
rmtree(directory)
return
# Add the title page
title_tex = os.path.join(directory, "title_page.tex")
title_pdf = os.path.join(directory, "title_page.pdf")
with open(title_tex, "w") as f:
f.write(self.template_loader.load("title_page.tex")
.generate(user=user, filename=filename,
timestr=timestr,
page_count=page_count,
paper_size=config.paper_size))
cmd = ["pdflatex",
"-interaction",
"nonstopmode",
title_tex]
ret = subprocess.call(cmd, cwd=directory)
if ret != 0:
raise Exception(
"Failed to create title page with command: %s"
"(error %d)" % (pretty_print_cmdline(cmd), ret))
pdfmerger = PdfFileMerger()
with open(title_pdf, "rb") as file_:
pdfmerger.append(file_)
with open(source_pdf, "rb") as file_:
pdfmerger.append(file_)
result = os.path.join(directory, "document.pdf")
with open(result, "wb") as file_:
pdfmerger.write(file_)
try:
printer_connection = cups.Connection()
printer_connection.printFile(
config.printer, result,
"Printout %d" % printjob_id, {})
except cups.IPPError as error:
logger.error("Unable to print: `%s'.", error)
else:
printjob.done = True
printjob.status = json.dumps([N_("Sent to printer")])
session.commit()
finally:
rmtree(directory)
def evaluate(self, job, file_cacher):
"""See TaskType.evaluate."""
if len(self.parameters) <= 0:
num_processes = 1
else:
num_processes = self.parameters[0]
indices = range(num_processes)
# Create sandboxes and FIFOs
sandbox_mgr = create_sandbox(file_cacher, job.multithreaded_sandbox)
sandbox_user = [
create_sandbox(file_cacher, job.multithreaded_sandbox)
for i in indices
]
fifo_dir = [tempfile.mkdtemp(dir=config.temp_dir) for i in indices]
fifo_in = [os.path.join(fifo_dir[i], "in%d" % i) for i in indices]
fifo_out = [os.path.join(fifo_dir[i], "out%d" % i) for i in indices]
for i in indices:
os.mkfifo(fifo_in[i])
os.mkfifo(fifo_out[i])
os.chmod(fifo_dir[i], 0o755)
os.chmod(fifo_in[i], 0o666)
os.chmod(fifo_out[i], 0o666)
# First step: we start the manager.
manager_filename = "manager"
manager_command = ["./%s" % manager_filename]
for i in indices:
manager_command.append(fifo_in[i])
manager_command.append(fifo_out[i])
manager_executables_to_get = {
manager_filename: job.managers[manager_filename].digest
}
manager_files_to_get = {"input.txt": job.input}
manager_allow_dirs = fifo_dir
for filename, digest in manager_executables_to_get.iteritems():
sandbox_mgr.create_file_from_storage(filename,
digest,
executable=True)
for filename, digest in manager_files_to_get.iteritems():
sandbox_mgr.create_file_from_storage(filename, digest)
manager = evaluation_step_before_run(sandbox_mgr,
manager_command,
num_processes * job.time_limit,
0,
allow_dirs=manager_allow_dirs,
writable_files=["output.txt"],
stdin_redirect="input.txt")
# Second step: we start the user submission compiled with the
# stub.
language = get_language(job.language)
executable_filename = job.executables.keys()[0]
executables_to_get = {
executable_filename: job.executables[executable_filename].digest
}
processes = [None for i in indices]
for i in indices:
args = [fifo_out[i], fifo_in[i]]
if num_processes != 1:
args.append(str(i))
commands = language.get_evaluation_commands(executable_filename,
main="stub",
args=args)
user_allow_dirs = [fifo_dir[i]]
for filename, digest in executables_to_get.iteritems():
sandbox_user[i].create_file_from_storage(filename,
digest,
executable=True)
# Assumes that the actual execution of the user solution
# is the last command in commands, and that the previous
# are "setup" that doesn't need tight control.
if len(commands) > 1:
evaluation_step(sandbox_user[i], commands[:-1], 10, 256)
processes[i] = evaluation_step_before_run(
sandbox_user[i],
commands[-1],
job.time_limit,
job.memory_limit,
allow_dirs=user_allow_dirs)
# Consume output.
wait_without_std(processes + [manager])
# TODO: check exit codes with translate_box_exitcode.
user_results = [evaluation_step_after_run(s) for s in sandbox_user]
success_user = all(r[0] for r in user_results)
plus_user = reduce(merge_evaluation_results,
[r[1] for r in user_results])
success_mgr, unused_plus_mgr = \
evaluation_step_after_run(sandbox_mgr)
if plus_user['exit_status'] == Sandbox.EXIT_OK and \
plus_user["execution_time"] >= job.time_limit:
plus_user['exit_status'] = Sandbox.EXIT_TIMEOUT
# Merge results.
job.sandboxes = [s.path for s in sandbox_user] + [sandbox_mgr.path]
job.plus = plus_user
# If at least one evaluation had problems, we report the
# problems.
if not success_user or not success_mgr:
success, outcome, text = False, None, None
# If the user sandbox detected some problem (timeout, ...),
# the outcome is 0.0 and the text describes that problem.
elif not is_evaluation_passed(plus_user):
success = True
outcome, text = 0.0, human_evaluation_message(plus_user)
# Otherwise, we use the manager to obtain the outcome.
else:
success = True
outcome, text = extract_outcome_and_text(sandbox_mgr)
# If asked so, save the output file, provided that it exists
if job.get_output:
if sandbox_mgr.file_exists("output.txt"):
job.user_output = sandbox_mgr.get_file_to_storage(
"output.txt", "Output file in job %s" % job.info)
else:
job.user_output = None
# Whatever happened, we conclude.
job.success = success
job.outcome = "%s" % outcome if outcome is not None else None
job.text = text
delete_sandbox(sandbox_mgr, job.success)
for s in sandbox_user:
delete_sandbox(s, job.success)
if not config.keep_sandbox:
for d in fifo_dir:
rmtree(d)
def do_export(self):
"""Run the actual export code."""
logger.info("Starting export.")
export_dir = self.export_target
archive_info = get_archive_info(self.export_target)
if archive_info["write_mode"] != "":
# We are able to write to this archive.
if os.path.exists(self.export_target):
logger.critical("The specified file already exists, "
"I won't overwrite it.")
return False
export_dir = os.path.join(tempfile.mkdtemp(),
archive_info["basename"])
logger.info("Creating dir structure.")
try:
os.mkdir(export_dir)
except OSError:
logger.critical("The specified directory already exists, "
"I won't overwrite it.")
return False
files_dir = os.path.join(export_dir, "files")
descr_dir = os.path.join(export_dir, "descriptions")
os.mkdir(files_dir)
os.mkdir(descr_dir)
with SessionGen() as session:
# Export files.
logger.info("Exporting files.")
if self.dump_files:
for contest_id in self.contests_ids:
contest = Contest.get_from_id(contest_id, session)
files = contest.enumerate_files(self.skip_submissions,
self.skip_user_tests,
self.skip_generated)
for file_ in files:
if not self.safe_get_file(file_,
os.path.join(files_dir,
file_),
os.path.join(descr_dir,
file_)):
return False
# Export data in JSON format.
if self.dump_model:
logger.info("Exporting data to a JSON file.")
# We use strings because they'll be the keys of a JSON
# object
self.ids = {}
self.queue = []
data = dict()
for cls, lst in [(Contest, self.contests_ids),
(User, self.users_ids),
(Task, self.tasks_ids)]:
for i in lst:
obj = cls.get_from_id(i, session)
self.get_id(obj)
# Specify the "root" of the data graph
data["_objects"] = self.ids.values()
while len(self.queue) > 0:
obj = self.queue.pop(0)
data[self.ids[obj.sa_identity_key]] = \
self.export_object(obj)
data["_version"] = model_version
with io.open(os.path.join(export_dir,
"contest.json"), "wb") as fout:
json.dump(data, fout, encoding="utf-8",
indent=4, sort_keys=True)
# If the admin requested export to file, we do that.
if archive_info["write_mode"] != "":
archive = tarfile.open(self.export_target,
archive_info["write_mode"])
archive.add(export_dir, arcname=archive_info["basename"])
archive.close()
rmtree(export_dir)
logger.info("Export finished.")
return True
def evaluate(self, job, file_cacher):
"""See TaskType.evaluate."""
if len(self.parameters) <= 0:
num_processes = 1
else:
num_processes = self.parameters[0]
indices = range(num_processes)
# Create sandboxes and FIFOs
sandbox_mgr = create_sandbox(file_cacher)
sandbox_user = [create_sandbox(file_cacher) for i in indices]
fifo_dir = [tempfile.mkdtemp(dir=config.temp_dir) for i in indices]
fifo_in = [os.path.join(fifo_dir[i], "in%d" % i) for i in indices]
fifo_out = [os.path.join(fifo_dir[i], "out%d" % i) for i in indices]
for i in indices:
os.mkfifo(fifo_in[i])
os.mkfifo(fifo_out[i])
os.chmod(fifo_dir[i], 0o755)
os.chmod(fifo_in[i], 0o666)
os.chmod(fifo_out[i], 0o666)
# First step: we start the manager.
manager_filename = "manager"
manager_command = ["./%s" % manager_filename]
for i in indices:
manager_command.append(fifo_in[i])
manager_command.append(fifo_out[i])
manager_executables_to_get = {
manager_filename:
job.managers[manager_filename].digest
}
manager_files_to_get = {
"input.txt": job.input
}
manager_allow_dirs = fifo_dir
for filename, digest in manager_executables_to_get.iteritems():
sandbox_mgr.create_file_from_storage(
filename, digest, executable=True)
for filename, digest in manager_files_to_get.iteritems():
sandbox_mgr.create_file_from_storage(filename, digest)
manager = evaluation_step_before_run(
sandbox_mgr,
manager_command,
num_processes * job.time_limit,
0,
allow_dirs=manager_allow_dirs,
writable_files=["output.txt"],
stdin_redirect="input.txt")
# Second step: we start the user submission compiled with the
# stub.
executable_filename = job.executables.keys()[0]
executables_to_get = {
executable_filename:
job.executables[executable_filename].digest
}
processes = [None for i in indices]
for i in indices:
command = ["./%s" % executable_filename, fifo_out[i], fifo_in[i]]
if num_processes != 1:
command.append(str(i))
user_allow_dirs = [fifo_dir[i]]
for filename, digest in executables_to_get.iteritems():
sandbox_user[i].create_file_from_storage(
filename, digest, executable=True)
processes[i] = evaluation_step_before_run(
sandbox_user[i],
command,
job.time_limit,
job.memory_limit,
allow_dirs=user_allow_dirs)
# Consume output.
wait_without_std(processes + [manager])
# TODO: check exit codes with translate_box_exitcode.
user_results = [evaluation_step_after_run(s) for s in sandbox_user]
success_user = all(r[0] for r in user_results)
plus_user = reduce(merge_evaluation_results,
[r[1] for r in user_results])
success_mgr, unused_plus_mgr = \
evaluation_step_after_run(sandbox_mgr)
if plus_user['exit_status'] == Sandbox.EXIT_OK and \
plus_user["execution_time"] >= job.time_limit:
plus_user['exit_status'] = Sandbox.EXIT_TIMEOUT
# Merge results.
job.sandboxes = [s.path for s in sandbox_user] + [sandbox_mgr.path]
job.plus = plus_user
# If at least one evaluation had problems, we report the
# problems.
if not success_user or not success_mgr:
success, outcome, text = False, None, None
# If the user sandbox detected some problem (timeout, ...),
# the outcome is 0.0 and the text describes that problem.
elif not is_evaluation_passed(plus_user):
success = True
outcome, text = 0.0, human_evaluation_message(plus_user)
# Otherwise, we use the manager to obtain the outcome.
else:
success = True
outcome, text = extract_outcome_and_text(sandbox_mgr)
# If asked so, save the output file, provided that it exists
if job.get_output:
if sandbox_mgr.file_exists("output.txt"):
job.user_output = sandbox_mgr.get_file_to_storage(
"output.txt",
"Output file in job %s" % job.info)
else:
job.user_output = None
# Whatever happened, we conclude.
job.success = success
job.outcome = "%s" % outcome if outcome is not None else None
job.text = text
delete_sandbox(sandbox_mgr)
for s in sandbox_user:
delete_sandbox(s)
if not config.keep_sandbox:
for d in fifo_dir:
rmtree(d)
def do_import(self):
"""Run the actual import code."""
logger.info("Starting import.")
if not os.path.isdir(self.import_source):
if self.import_source.endswith(".zip"):
archive = zipfile.ZipFile(self.import_source, "r")
file_names = archive.infolist()
self.import_dir = tempfile.mkdtemp()
archive.extractall(self.import_dir)
elif self.import_source.endswith(".tar.gz") \
or self.import_source.endswith(".tgz") \
or self.import_source.endswith(".tar.bz2") \
or self.import_source.endswith(".tbz2") \
or self.import_source.endswith(".tar"):
archive = tarfile.open(name=self.import_source)
file_names = archive.getnames()
elif self.import_source.endswith(".tar.xz") \
or self.import_source.endswith(".txz"):
try:
import lzma
except ImportError:
logger.critical("LZMA compression format not "
"supported. Please install package "
"lzma.")
return False
archive = tarfile.open(
fileobj=lzma.LZMAFile(self.import_source))
file_names = archive.getnames()
else:
logger.critical("Unable to import from %s." %
self.import_source)
return False
root = find_root_of_archive(file_names)
if root is None:
logger.critical("Cannot find a root directory in %s." %
self.import_source)
return False
self.import_dir = tempfile.mkdtemp()
archive.extractall(self.import_dir)
self.import_dir = os.path.join(self.import_dir, root)
if self.drop:
logger.info("Dropping and recreating the database.")
try:
if not (drop_db() and init_db()):
logger.critical(
"Unexpected error while dropping "
"and recreating the database.",
exc_info=True)
return False
except Exception as error:
logger.critical("Unable to access DB.\n%r" % error)
return False
with SessionGen() as session:
# Import the contest in JSON format.
if self.load_model:
logger.info("Importing the contest from a JSON file.")
with io.open(os.path.join(self.import_dir, "contest.json"),
"rb") as fin:
# TODO - Throughout all the code we'll assume the
# input is correct without actually doing any
# validations. Thus, for example, we're not
# checking that the decoded object is a dict...
self.datas = json.load(fin, encoding="utf-8")
# If the dump has been exported using a data model
# different than the current one (that is, a previous
# one) we try to update it.
# If no "_version" field is found we assume it's a v1.0
# export (before the new dump format was introduced).
dump_version = self.datas.get("_version", 0)
if dump_version < model_version:
logger.warning(
"The dump you're trying to import has been created "
"by an old version of CMS. It may take a while to "
"adapt it to the current data model. You can use "
"cmsDumpUpdater to update the on-disk dump and "
"speed up future imports.")
if dump_version > model_version:
logger.critical(
"The dump you're trying to import has been created "
"by a version of CMS newer than this one and there "
"is no way to adapt it to the current data model. "
"You probably need to update CMS to handle it. It's "
"impossible to proceed with the importation.")
return False
for version in range(dump_version, model_version):
# Update from version to version+1
updater = __import__(
"cmscontrib.updaters.update_%d" % (version + 1),
globals(), locals(), ["Updater"]).Updater(self.datas)
self.datas = updater.run()
self.datas["_version"] = version + 1
assert self.datas["_version"] == model_version
self.objs = dict()
for id_, data in self.datas.iteritems():
if not id_.startswith("_"):
self.objs[id_] = self.import_object(data)
for id_, data in self.datas.iteritems():
if not id_.startswith("_"):
self.add_relationships(data, self.objs[id_])
for k, v in list(self.objs.iteritems()):
# Skip submissions if requested
if self.skip_submissions and isinstance(v, Submission):
del self.objs[k]
# Skip user_tests if requested
if self.skip_user_tests and isinstance(v, UserTest):
del self.objs[k]
# Skip generated data if requested
if self.skip_generated and \
isinstance(v, (SubmissionResult, UserTestResult)):
del self.objs[k]
contest_id = list()
contest_files = set()
# Add each base object and all its dependencies
for id_ in self.datas["_objects"]:
contest = self.objs[id_]
# We explictly add only the contest since all child
# objects will be automatically added by cascade.
# Adding each object individually would also add
# orphaned objects like the ones that depended on
# submissions or user_tests that we (possibly)
# removed above.
session.add(contest)
session.flush()
contest_id += [contest.id]
contest_files |= contest.enumerate_files(
self.skip_submissions, self.skip_user_tests,
self.skip_generated)
session.commit()
else:
contest_id = None
contest_files = None
# Import files.
if self.load_files:
logger.info("Importing files.")
files_dir = os.path.join(self.import_dir, "files")
descr_dir = os.path.join(self.import_dir, "descriptions")
files = set(os.listdir(files_dir))
descr = set(os.listdir(descr_dir))
if not descr <= files:
logger.warning("Some files do not have an associated "
"description.")
if not files <= descr:
logger.warning("Some descriptions do not have an "
"associated file.")
if not (contest_files is None or files <= contest_files):
# FIXME Check if it's because this is a light import
# or because we're skipping submissions or user_tests
logger.warning("The dump contains some files that are "
"not needed by the contest.")
if not (contest_files is None or contest_files <= files):
# The reason for this could be that it was a light
# export that's not being reimported as such.
logger.warning("The contest needs some files that are "
"not contained in the dump.")
# Limit import to files we actually need.
if contest_files is not None:
files &= contest_files
for digest in files:
file_ = os.path.join(files_dir, digest)
desc = os.path.join(descr_dir, digest)
if not self.safe_put_file(file_, desc):
logger.critical(
"Unable to put file `%s' in the database. "
"Aborting. Please remove the contest "
"from the database." % file_)
# TODO: remove contest from the database.
return False
if contest_id is not None:
logger.info("Import finished (contest id: %s)." %
", ".join(str(id_) for id_ in contest_id))
else:
logger.info("Import finished.")
# If we extracted an archive, we remove it.
if self.import_dir != self.import_source:
rmtree(self.import_dir)
return True
def do_import(self):
"""Run the actual import code."""
logger.info("Starting import.")
if not os.path.isdir(self.import_source):
if self.import_source.endswith(".zip"):
archive = zipfile.ZipFile(self.import_source, "r")
file_names = archive.infolist()
self.import_dir = tempfile.mkdtemp()
archive.extractall(self.import_dir)
elif self.import_source.endswith(".tar.gz") \
or self.import_source.endswith(".tgz") \
or self.import_source.endswith(".tar.bz2") \
or self.import_source.endswith(".tbz2") \
or self.import_source.endswith(".tar"):
archive = tarfile.open(name=self.import_source)
file_names = archive.getnames()
elif self.import_source.endswith(".tar.xz") \
or self.import_source.endswith(".txz"):
try:
import lzma
except ImportError:
logger.critical("LZMA compression format not "
"supported. Please install package "
"lzma.")
return False
archive = tarfile.open(
fileobj=lzma.LZMAFile(self.import_source))
file_names = archive.getnames()
else:
logger.critical("Unable to import from %s." %
self.import_source)
return False
root = find_root_of_archive(file_names)
if root is None:
logger.critical("Cannot find a root directory in %s." %
self.import_source)
return False
self.import_dir = tempfile.mkdtemp()
archive.extractall(self.import_dir)
self.import_dir = os.path.join(self.import_dir, root)
if self.drop:
logger.info("Dropping and recreating the database.")
try:
if not (drop_db() and init_db()):
logger.critical("Unexpected error while dropping "
"and recreating the database.",
exc_info=True)
return False
except Exception as error:
logger.critical("Unable to access DB.\n%r" % error)
return False
with SessionGen() as session:
# Import the contest in JSON format.
if self.load_model:
logger.info("Importing the contest from a JSON file.")
with io.open(os.path.join(self.import_dir,
"contest.json"), "rb") as fin:
# TODO - Throughout all the code we'll assume the
# input is correct without actually doing any
# validations. Thus, for example, we're not
# checking that the decoded object is a dict...
self.datas = json.load(fin, encoding="utf-8")
# If the dump has been exported using a data model
# different than the current one (that is, a previous
# one) we try to update it.
# If no "_version" field is found we assume it's a v1.0
# export (before the new dump format was introduced).
dump_version = self.datas.get("_version", 0)
if dump_version < model_version:
logger.warning(
"The dump you're trying to import has been created "
"by an old version of CMS. It may take a while to "
"adapt it to the current data model. You can use "
"cmsDumpUpdater to update the on-disk dump and "
"speed up future imports.")
if dump_version > model_version:
logger.critical(
"The dump you're trying to import has been created "
"by a version of CMS newer than this one and there "
"is no way to adapt it to the current data model. "
"You probably need to update CMS to handle it. It's "
"impossible to proceed with the importation.")
return False
for version in range(dump_version, model_version):
# Update from version to version+1
updater = __import__(
"cmscontrib.updaters.update_%d" % (version + 1),
globals(), locals(), ["Updater"]).Updater(self.datas)
self.datas = updater.run()
self.datas["_version"] = version + 1
assert self.datas["_version"] == model_version
self.objs = dict()
for id_, data in self.datas.iteritems():
if not id_.startswith("_"):
self.objs[id_] = self.import_object(data)
for id_, data in self.datas.iteritems():
if not id_.startswith("_"):
self.add_relationships(data, self.objs[id_])
for k, v in list(self.objs.iteritems()):
# Skip submissions if requested
if self.skip_submissions and isinstance(v, Submission):
del self.objs[k]
# Skip user_tests if requested
if self.skip_user_tests and isinstance(v, UserTest):
del self.objs[k]
# Skip generated data if requested
if self.skip_generated and \
isinstance(v, (SubmissionResult, UserTestResult)):
del self.objs[k]
contest_id = list()
contest_files = set()
# Add each base object and all its dependencies
for id_ in self.datas["_objects"]:
contest = self.objs[id_]
# We explictly add only the contest since all child
# objects will be automatically added by cascade.
# Adding each object individually would also add
# orphaned objects like the ones that depended on
# submissions or user_tests that we (possibly)
# removed above.
session.add(contest)
session.flush()
contest_id += [contest.id]
contest_files |= contest.enumerate_files(
self.skip_submissions, self.skip_user_tests, self.skip_generated)
session.commit()
else:
contest_id = None
contest_files = None
# Import files.
if self.load_files:
logger.info("Importing files.")
files_dir = os.path.join(self.import_dir, "files")
descr_dir = os.path.join(self.import_dir, "descriptions")
files = set(os.listdir(files_dir))
descr = set(os.listdir(descr_dir))
if not descr <= files:
logger.warning("Some files do not have an associated "
"description.")
if not files <= descr:
logger.warning("Some descriptions do not have an "
"associated file.")
if not (contest_files is None or files <= contest_files):
# FIXME Check if it's because this is a light import
# or because we're skipping submissions or user_tests
logger.warning("The dump contains some files that are "
"not needed by the contest.")
if not (contest_files is None or contest_files <= files):
# The reason for this could be that it was a light
# export that's not being reimported as such.
logger.warning("The contest needs some files that are "
"not contained in the dump.")
# Limit import to files we actually need.
if contest_files is not None:
files &= contest_files
for digest in files:
file_ = os.path.join(files_dir, digest)
desc = os.path.join(descr_dir, digest)
if not self.safe_put_file(file_, desc):
logger.critical("Unable to put file `%s' in the database. "
"Aborting. Please remove the contest "
"from the database." % file_)
# TODO: remove contest from the database.
return False
if contest_id is not None:
logger.info("Import finished (contest id: %s)." %
", ".join(str(id_) for id_ in contest_id))
else:
logger.info("Import finished.")
# If we extracted an archive, we remove it.
if self.import_dir != self.import_source:
rmtree(self.import_dir)
return True
def destroy_cache(self):
"""Completely destroys the cache. The FileCacher is not usable
anymore.
"""
rmtree(self.base_dir)
def evaluate(self, job, file_cacher):
"""See TaskType.evaluate."""
# Create sandboxes and FIFOs
sandbox_mgr = create_sandbox(file_cacher)
sandbox_user = create_sandbox(file_cacher)
fifo_dir = tempfile.mkdtemp(dir=config.temp_dir)
fifo_in = os.path.join(fifo_dir, "in")
fifo_out = os.path.join(fifo_dir, "out")
os.mkfifo(fifo_in)
os.mkfifo(fifo_out)
os.chmod(fifo_dir, 0o755)
os.chmod(fifo_in, 0o666)
os.chmod(fifo_out, 0o666)
# First step: we start the manager.
manager_filename = "manager"
manager_command = ["./%s" % manager_filename, fifo_in, fifo_out]
manager_executables_to_get = {
manager_filename: job.managers[manager_filename].digest
}
manager_files_to_get = {"input.txt": job.input}
manager_allow_dirs = [fifo_dir]
for filename, digest in manager_executables_to_get.iteritems():
sandbox_mgr.create_file_from_storage(filename,
digest,
executable=True)
for filename, digest in manager_files_to_get.iteritems():
sandbox_mgr.create_file_from_storage(filename, digest)
manager = evaluation_step_before_run(sandbox_mgr,
manager_command,
job.time_limit,
0,
allow_dirs=manager_allow_dirs,
writable_files=["output.txt"],
stdin_redirect="input.txt")
# Second step: we start the user submission compiled with the
# stub.
executable_filename = job.executables.keys()[0]
command = ["./%s" % executable_filename, fifo_out, fifo_in]
executables_to_get = {
executable_filename: job.executables[executable_filename].digest
}
user_allow_dirs = [fifo_dir]
for filename, digest in executables_to_get.iteritems():
sandbox_user.create_file_from_storage(filename,
digest,
executable=True)
process = evaluation_step_before_run(sandbox_user,
command,
job.time_limit,
job.memory_limit,
allow_dirs=user_allow_dirs)
# Consume output.
wait_without_std([process, manager])
# TODO: check exit codes with translate_box_exitcode.
success_user, plus_user = \
evaluation_step_after_run(sandbox_user)
success_mgr, unused_plus_mgr = \
evaluation_step_after_run(sandbox_mgr)
job.sandboxes = [sandbox_user.path, sandbox_mgr.path]
job.plus = plus_user
# If at least one evaluation had problems, we report the
# problems.
if not success_user or not success_mgr:
success, outcome, text = False, None, None
# If the user sandbox detected some problem (timeout, ...),
# the outcome is 0.0 and the text describes that problem.
elif not is_evaluation_passed(plus_user):
success = True
outcome, text = 0.0, human_evaluation_message(plus_user)
# Otherwise, we use the manager to obtain the outcome.
else:
success = True
outcome, text = extract_outcome_and_text(sandbox_mgr)
# If asked so, save the output file, provided that it exists
if job.get_output:
if sandbox_mgr.file_exists("output.txt"):
job.user_output = sandbox_mgr.get_file_to_storage(
"output.txt", "Output file in job %s" % job.info)
else:
job.user_output = None
# Whatever happened, we conclude.
job.success = success
job.outcome = "%s" % outcome if outcome is not None else None
job.text = text
delete_sandbox(sandbox_mgr)
delete_sandbox(sandbox_user)
if not config.keep_sandbox:
rmtree(fifo_dir)
def evaluate(self, job, file_cacher):
"""See TaskType.evaluate."""
if len(self.parameters) <= 0:
num_processes = 1
else:
num_processes = self.parameters[0]
indices = range(num_processes)
# Create sandboxes and FIFOs
sandbox_mgr = create_sandbox(file_cacher, job.multithreaded_sandbox)
sandbox_user = [
create_sandbox(file_cacher, job.multithreaded_sandbox)
for i in indices
]
fifo_dir = [tempfile.mkdtemp(dir=config.temp_dir) for i in indices]
fifo_in = [os.path.join(fifo_dir[i], "in%d" % i) for i in indices]
fifo_out = [os.path.join(fifo_dir[i], "out%d" % i) for i in indices]
for i in indices:
os.mkfifo(fifo_in[i])
os.mkfifo(fifo_out[i])
os.chmod(fifo_dir[i], 0o755)
os.chmod(fifo_in[i], 0o666)
os.chmod(fifo_out[i], 0o666)
# First step: we start the manager.
manager_filename = "manager"
manager_command = ["./%s" % manager_filename]
for i in indices:
manager_command.append(fifo_in[i])
manager_command.append(fifo_out[i])
manager_executables_to_get = {
manager_filename: job.managers[manager_filename].digest
}
manager_files_to_get = {"input.txt": job.input}
manager_allow_dirs = fifo_dir
for filename, digest in manager_executables_to_get.iteritems():
sandbox_mgr.create_file_from_storage(filename,
digest,
executable=True)
for filename, digest in manager_files_to_get.iteritems():
sandbox_mgr.create_file_from_storage(filename, digest)
manager = evaluation_step_before_run(
sandbox_mgr,
manager_command,
num_processes * job.time_limit,
0,
allow_dirs=manager_allow_dirs,
writable_files=["output.txt"],
stdin_redirect="input.txt",
stdout_redirect="output.txt",
)
# Second step: we start the user submission compiled with the
# stub.
language = get_language(job.language)
executable_filename = job.executables.keys()[0]
executables_to_get = {
executable_filename: job.executables[executable_filename].digest
}
processes = [None for i in indices]
for i in indices:
args = [fifo_out[i], fifo_in[i]]
if num_processes != 1:
args.append(str(i))
commands = language.get_evaluation_commands(executable_filename,
main="grader",
args=args)
user_allow_dirs = [fifo_dir[i]]
for filename, digest in executables_to_get.iteritems():
sandbox_user[i].create_file_from_storage(filename,
digest,
executable=True)
# Assumes that the actual execution of the user solution
# is the last command in commands, and that the previous
# are "setup" that doesn't need tight control.
if len(commands) > 1:
evaluation_step(sandbox_user[i], commands[:-1], 10, 256)
processes[i] = evaluation_step_before_run(
sandbox_user[i],
commands[-1],
job.time_limit,
job.memory_limit,
allow_dirs=user_allow_dirs)
# Consume output.
wait_without_std(processes + [manager])
# TODO: check exit codes with translate_box_exitcode.
user_results = [evaluation_step_after_run(s) for s in sandbox_user]
success_user = all(r[0] for r in user_results)
plus_user = reduce(merge_evaluation_results,
[r[1] for r in user_results])
success_mgr, unused_plus_mgr = \
evaluation_step_after_run(sandbox_mgr)
if plus_user['exit_status'] == Sandbox.EXIT_OK and \
plus_user["execution_time"] >= job.time_limit:
plus_user['exit_status'] = Sandbox.EXIT_TIMEOUT
# Merge results.
job.sandboxes = [s.path for s in sandbox_user] + [sandbox_mgr.path]
job.plus = plus_user
# If at least one evaluation had problems, we report the
# problems.
if not success_user or not success_mgr:
success, outcome, text = False, None, None
# If the user sandbox detected some problem (timeout, ...),
# the outcome is 0.0 and the text describes that problem.
elif not is_evaluation_passed(plus_user):
success = True
outcome, text = 0.0, human_evaluation_message(plus_user)
if job.get_output:
job.user_output = None
# Otherwise, we use the manager to obtain the outcome.
else:
success = True
outcome = None
text = None
input_filename = "input.txt"
output_filename = "output.txt"
# Check that the output file was created
if not sandbox_mgr.file_exists(output_filename):
outcome = 0.0
text = [
N_("Evaluation didn't produce file %s"), output_filename
]
if job.get_output:
job.user_output = None
else:
# If asked so, put the output file into the storage
if job.get_output:
job.user_output = sandbox_mgr.get_file_to_storage(
output_filename,
"Output file in job %s" % job.info,
trunc_len=1024 * 1024 * 10)
# If just asked to execute, fill text and set dummy
# outcome.
if job.only_execution:
outcome = 0.0
text = [N_("Execution completed successfully")]
# Otherwise evaluate the output file.
else:
# Put the reference solution into the sandbox
sandbox_mgr.create_file_from_storage("res.txt", job.output)
# Check the solution with white_diff
if self.parameters[1] == "diff":
outcome, text = white_diff_step(
sandbox_mgr, output_filename, "res.txt")
# Check the solution with a comparator
elif self.parameters[1] == "comparator":
manager_filename = "checker"
if manager_filename not in job.managers:
logger.error(
"Configuration error: missing or "
"invalid comparator (it must be "
"named 'checker')",
extra={"operation": job.info})
success = False
else:
sandbox_mgr.create_file_from_storage(
manager_filename,
job.managers[manager_filename].digest,
executable=True)
# Rewrite input file. The untrusted
# contestant program should not be able to
# modify it; however, the grader may
# destroy the input file to prevent the
# contestant's program from directly
# accessing it. Since we cannot create
# files already existing in the sandbox,
# we try removing the file first.
try:
sandbox_mgr.remove_file(input_filename)
except OSError as e:
# Let us be extra sure that the file
# was actually removed and we did not
# mess up with permissions.
assert not sandbox_mgr.file_exists(
input_filename)
sandbox_mgr.create_file_from_storage(
input_filename, job.input)
# Allow using any number of processes (because e.g.
# one may want to write a bash checker who calls
# other processes). Set to a high number because
# to avoid fork-bombing the worker.
sandbox_mgr.max_processes = 1000
success, _ = evaluation_step(
sandbox_mgr, [[
"./%s" % manager_filename, input_filename,
"res.txt", output_filename
]])
if success:
try:
outcome, text = \
extract_outcome_and_text(sandbox_mgr)
except ValueError as e:
logger.error(
"Invalid output from "
"comparator: %s",
e.message,
extra={"operation": job.info})
success = False
else:
raise ValueError("Unrecognized second parameter"
" `%s' for Communication tasktype." %
self.parameters[2])
# Whatever happened, we conclude.
job.success = success
job.outcome = "%s" % outcome if outcome is not None else None
job.text = text
delete_sandbox(sandbox_mgr, job.success)
for s in sandbox_user:
delete_sandbox(s, job.success)
if not config.keep_sandbox:
for d in fifo_dir:
rmtree(d)
def do_export(self):
"""Run the actual export code."""
logger.info("Starting export.")
export_dir = self.export_target
archive_info = get_archive_info(self.export_target)
if archive_info["write_mode"] != "":
# We are able to write to this archive.
if os.path.exists(self.export_target):
logger.critical("The specified file already exists, "
"I won't overwrite it.")
return False
export_dir = os.path.join(tempfile.mkdtemp(),
archive_info["basename"])
logger.info("Creating dir structure.")
try:
os.mkdir(export_dir)
except OSError:
logger.critical("The specified directory already exists, "
"I won't overwrite it.")
return False
files_dir = os.path.join(export_dir, "files")
descr_dir = os.path.join(export_dir, "descriptions")
os.mkdir(files_dir)
os.mkdir(descr_dir)
with SessionGen() as session:
# Export files.
logger.info("Exporting files.")
if self.dump_files:
for contest_id in self.contests_ids:
contest = Contest.get_from_id(contest_id, session)
files = contest.enumerate_files(self.skip_submissions,
self.skip_user_tests,
self.skip_generated)
for file_ in files:
if not self.safe_get_file(
file_, os.path.join(files_dir, file_),
os.path.join(descr_dir, file_)):
return False
# Export data in JSON format.
if self.dump_model:
logger.info("Exporting data to a JSON file.")
# We use strings because they'll be the keys of a JSON
# object
self.ids = {}
self.queue = []
data = dict()
for cls, lst in [(Contest, self.contests_ids),
(User, self.users_ids),
(Task, self.tasks_ids)]:
for i in lst:
obj = cls.get_from_id(i, session)
self.get_id(obj)
# Specify the "root" of the data graph
data["_objects"] = self.ids.values()
while len(self.queue) > 0:
obj = self.queue.pop(0)
data[self.ids[obj.sa_identity_key]] = \
self.export_object(obj)
data["_version"] = model_version
with io.open(os.path.join(export_dir, "contest.json"),
"wb") as fout:
json.dump(data,
fout,
encoding="utf-8",
indent=4,
sort_keys=True)
# If the admin requested export to file, we do that.
if archive_info["write_mode"] != "":
archive = tarfile.open(self.export_target,
archive_info["write_mode"])
archive.add(export_dir, arcname=archive_info["basename"])
archive.close()
rmtree(export_dir)
logger.info("Export finished.")
return True
def evaluate(self, job, file_cacher):
"""See TaskType.evaluate."""
# Create sandboxes and FIFOs
sandbox_mgr = create_sandbox(file_cacher)
sandbox_user = create_sandbox(file_cacher)
fifo_dir = tempfile.mkdtemp(dir=config.temp_dir)
fifo_in = os.path.join(fifo_dir, "in")
fifo_out = os.path.join(fifo_dir, "out")
os.mkfifo(fifo_in)
os.mkfifo(fifo_out)
os.chmod(fifo_dir, 0o755)
os.chmod(fifo_in, 0o666)
os.chmod(fifo_out, 0o666)
# First step: we start the manager.
manager_filename = "manager"
manager_command = ["./%s" % manager_filename, fifo_in, fifo_out]
manager_executables_to_get = {manager_filename: job.managers[manager_filename].digest}
manager_files_to_get = {"input.txt": job.input}
manager_allow_dirs = [fifo_dir]
for filename, digest in manager_executables_to_get.iteritems():
sandbox_mgr.create_file_from_storage(filename, digest, executable=True)
for filename, digest in manager_files_to_get.iteritems():
sandbox_mgr.create_file_from_storage(filename, digest)
manager = evaluation_step_before_run(
sandbox_mgr,
manager_command,
job.time_limit,
0,
allow_dirs=manager_allow_dirs,
writable_files=["output.txt"],
stdin_redirect="input.txt",
)
# Second step: we start the user submission compiled with the
# stub.
executable_filename = job.executables.keys()[0]
command = ["./%s" % executable_filename, fifo_out, fifo_in]
executables_to_get = {executable_filename: job.executables[executable_filename].digest}
user_allow_dirs = [fifo_dir]
for filename, digest in executables_to_get.iteritems():
sandbox_user.create_file_from_storage(filename, digest, executable=True)
process = evaluation_step_before_run(
sandbox_user, command, job.time_limit, job.memory_limit, allow_dirs=user_allow_dirs
)
# Consume output.
wait_without_std([process, manager])
# TODO: check exit codes with translate_box_exitcode.
success_user, plus_user = evaluation_step_after_run(sandbox_user)
success_mgr, unused_plus_mgr = evaluation_step_after_run(sandbox_mgr)
job.sandboxes = [sandbox_user.path, sandbox_mgr.path]
job.plus = plus_user
# If at least one evaluation had problems, we report the
# problems.
if not success_user or not success_mgr:
success, outcome, text = False, None, None
# If the user sandbox detected some problem (timeout, ...),
# the outcome is 0.0 and the text describes that problem.
elif not is_evaluation_passed(plus_user):
success = True
outcome, text = 0.0, human_evaluation_message(plus_user)
# Otherwise, we use the manager to obtain the outcome.
else:
success = True
outcome, text = extract_outcome_and_text(sandbox_mgr)
# If asked so, save the output file, provided that it exists
if job.get_output:
if sandbox_mgr.file_exists("output.txt"):
job.user_output = sandbox_mgr.get_file_to_storage("output.txt", "Output file in job %s" % job.info)
else:
job.user_output = None
# Whatever happened, we conclude.
job.success = success
job.outcome = "%s" % outcome if outcome is not None else None
job.text = text
delete_sandbox(sandbox_mgr)
delete_sandbox(sandbox_user)
if not config.keep_sandbox:
rmtree(fifo_dir)