sys/contrib/openzfs/tests/test-runner/bin/zts-report.py.in

   1 #!/usr/bin/env @PYTHON_SHEBANG@
   2
   3 #
   4 # This file and its contents are supplied under the terms of the
   5 # Common Development and Distribution License ("CDDL"), version 1.0.
   6 # You may only use this file in accordance with the terms of version
   7 # 1.0 of the CDDL.
   8 #
   9 # A full copy of the text of the CDDL should have accompanied this
  10 # source.  A copy of the CDDL is also available via the Internet at
  11 # http://www.illumos.org/license/CDDL.
  12 #
  13
  14 #
  15 # Copyright (c) 2017 by Delphix. All rights reserved.
  16 # Copyright (c) 2018 by Lawrence Livermore National Security, LLC.
  17 #
  18 # This script must remain compatible with Python 3.6+.
  19 #
  20
  21 import os
  22 import re
  23 import sys
  24 import argparse
  25
  26 #
  27 # This script parses the stdout of zfstest, which has this format:
  28 #
  29 # Test: /path/to/testa (run as root) [00:00] [PASS]
  30 # Test: /path/to/testb (run as jkennedy) [00:00] [PASS]
  31 # Test: /path/to/testc (run as root) [00:00] [FAIL]
  32 # [...many more results...]
  33 #
  34 # Results Summary
  35 # FAIL      22
  36 # SKIP      32
  37 # PASS    1156
  38 #
  39 # Running Time:   02:50:31
  40 # Percent passed: 95.5%
  41 # Log directory:  /var/tmp/test_results/20180615T205926
  42 #
  43
  44 #
  45 # Common generic reasons for a test or test group to be skipped.
  46 #
  47 # Some test cases are known to fail in ways which are not harmful or dangerous.
  48 # In these cases simply mark the test as a known failure until it can be
  49 # updated and the issue resolved.  Note that it's preferable to open a unique
  50 # issue on the GitHub issue tracker for each test case failure.
  51 #
  52 known_reason = 'Known issue'
  53
  54 #
  55 # Some tests require that a test user be able to execute the zfs utilities.
  56 # This may not be possible when testing in-tree due to the default permissions
  57 # on the user's home directory.  When testing this can be resolved by granting
  58 # group read access.
  59 #
  60 # chmod 0750 $HOME
  61 #
  62 exec_reason = 'Test user execute permissions required for utilities'
  63
  64 #
  65 # Some tests require that the kernel supports renameat2 syscall.
  66 #
  67 renameat2_reason = 'Kernel renameat2 support required'
  68
  69 #
  70 # Some tests require the O_TMPFILE flag which was first introduced in the
  71 # 3.11 kernel.
  72 #
  73 tmpfile_reason = 'Kernel O_TMPFILE support required'
  74
  75 #
  76 # Some tests require the statx(2) system call on Linux which was first
  77 # introduced in the 4.11 kernel.
  78 #
  79 statx_reason = 'Kernel statx(2) system call required on Linux'
  80
  81 #
  82 # Some tests require that the lsattr utility support the project id feature.
  83 #
  84 project_id_reason = 'lsattr with set/show project ID required'
  85
  86 #
  87 # Some tests require that the kernel support user namespaces.
  88 #
  89 user_ns_reason = 'Kernel user namespace support required'
  90
  91 #
  92 # Some rewind tests can fail since nothing guarantees that old MOS blocks
  93 # are not overwritten.  Snapshots protect datasets and data files but not
  94 # the MOS.  Reasonable efforts are made in the test case to increase the
  95 # odds that some txgs will have their MOS data left untouched, but it is
  96 # never a sure thing.
  97 #
  98 rewind_reason = 'Arbitrary pool rewind is not guaranteed'
  99
 100 #
 101 # Some tests require a minimum version of the fio benchmark utility.
 102 # Older distributions such as CentOS 6.x only provide fio-2.0.13.
 103 #
 104 fio_reason = 'Fio v2.3 or newer required'
 105
 106 #
 107 # Some tests require that the DISKS provided support the discard operation.
 108 # Normally this is not an issue because loop back devices are used for DISKS
 109 # and they support discard (TRIM/UNMAP).
 110 #
 111 trim_reason = 'DISKS must support discard (TRIM/UNMAP)'
 112
 113 #
 114 # Some tests on FreeBSD require the fspacectl(2) system call and the
 115 # truncate(1) utility supporting the -d option.  The system call was first
 116 # introduced in FreeBSD version 1400032.
 117 #
 118 fspacectl_reason = 'fspacectl(2) and truncate -d support required'
 119
 120 #
 121 # Some tests are not applicable to a platform or need to be updated to operate
 122 # in the manor required by the platform.  Any tests which are skipped for this
 123 # reason will be suppressed in the final analysis output.
 124 #
 125 na_reason = "Not applicable"
 126
 127 #
 128 # Some test cases doesn't have all requirements to run on Github actions CI.
 129 #
 130 ci_reason = 'CI runner doesn\'t have all requirements'
 131
 132 #
 133 # Idmapped mount is only supported in kernel version >= 5.12
 134 #
 135 idmap_reason = 'Idmapped mount needs kernel 5.12+'
 136
 137 #
 138 # copy_file_range() is not supported by all kernels
 139 #
 140 cfr_reason = 'Kernel copy_file_range support required'
 141 cfr_cross_reason = 'copy_file_range(2) cross-filesystem needs kernel 5.3+'
 142
 143 #
 144 # These tests are known to fail, thus we use this list to prevent these
 145 # failures from failing the job as a whole; only unexpected failures
 146 # bubble up to cause this script to exit with a non-zero exit status.
 147 #
 148 # Format: { 'test-name': ['expected result', 'issue-number | reason'] }
 149 #
 150 # For each known failure it is recommended to link to a GitHub issue by
 151 # setting the reason to the issue number.  Alternately, one of the generic
 152 # reasons listed above can be used.
 153 #
 154 known = {
 155     'casenorm/mixed_none_lookup_ci': ['FAIL', 7633],
 156     'casenorm/mixed_formd_lookup_ci': ['FAIL', 7633],
 157     'cli_root/zpool_import/import_rewind_device_replaced':
 158         ['FAIL', rewind_reason],
 159     'cli_user/misc/zfs_share_001_neg': ['SKIP', na_reason],
 160     'cli_user/misc/zfs_unshare_001_neg': ['SKIP', na_reason],
 161     'pool_checkpoint/checkpoint_discard_busy': ['SKIP', 12053],
 162     'privilege/setup': ['SKIP', na_reason],
 163     'refreserv/refreserv_004_pos': ['FAIL', known_reason],
 164     'rootpool/setup': ['SKIP', na_reason],
 165     'rsend/rsend_008_pos': ['SKIP', 6066],
 166     'vdev_zaps/vdev_zaps_007_pos': ['FAIL', known_reason],
 167 }
 168
 169 if sys.platform.startswith('freebsd'):
 170     known.update({
 171         'cli_root/zfs_receive/receive-o-x_props_override':
 172             ['FAIL', known_reason],
 173         'cli_root/zpool_resilver/zpool_resilver_concurrent':
 174             ['SKIP', na_reason],
 175         'cli_root/zpool_wait/zpool_wait_trim_basic': ['SKIP', trim_reason],
 176         'cli_root/zpool_wait/zpool_wait_trim_cancel': ['SKIP', trim_reason],
 177         'cli_root/zpool_wait/zpool_wait_trim_flag': ['SKIP', trim_reason],
 178         'cli_root/zfs_unshare/zfs_unshare_008_pos': ['SKIP', na_reason],
 179         'link_count/link_count_001': ['SKIP', na_reason],
 180         'casenorm/mixed_create_failure': ['FAIL', 13215],
 181         'mmap/mmap_sync_001_pos': ['SKIP', na_reason],
 182         'rsend/send_raw_ashift': ['SKIP', 14961],
 183     })
 184 elif sys.platform.startswith('linux'):
 185     known.update({
 186         'casenorm/mixed_formd_lookup': ['FAIL', 7633],
 187         'casenorm/mixed_formd_delete': ['FAIL', 7633],
 188         'casenorm/sensitive_formd_lookup': ['FAIL', 7633],
 189         'casenorm/sensitive_formd_delete': ['FAIL', 7633],
 190         'removal/removal_with_zdb': ['SKIP', known_reason],
 191         'cli_root/zfs_unshare/zfs_unshare_002_pos': ['SKIP', na_reason],
 192     })
 193
 194
 195 #
 196 # These tests may occasionally fail or be skipped.  We want there failures
 197 # to be reported but only unexpected failures should bubble up to cause
 198 # this script to exit with a non-zero exit status.
 199 #
 200 # Format: { 'test-name': ['expected result', 'issue-number | reason'] }
 201 #
 202 # For each known failure it is recommended to link to a GitHub issue by
 203 # setting the reason to the issue number.  Alternately, one of the generic
 204 # reasons listed above can be used.
 205 #
 206 maybe = {
 207     'append/threadsappend_001_pos': ['FAIL', 6136],
 208     'chattr/setup': ['SKIP', exec_reason],
 209     'crtime/crtime_001_pos': ['SKIP', statx_reason],
 210     'cli_root/zdb/zdb_006_pos': ['FAIL', known_reason],
 211     'cli_root/zfs_destroy/zfs_destroy_dev_removal_condense':
 212         ['FAIL', known_reason],
 213     'cli_root/zfs_get/zfs_get_004_pos': ['FAIL', known_reason],
 214     'cli_root/zfs_get/zfs_get_009_pos': ['SKIP', 5479],
 215     'cli_root/zfs_rollback/zfs_rollback_001_pos': ['FAIL', known_reason],
 216     'cli_root/zfs_rollback/zfs_rollback_002_pos': ['FAIL', known_reason],
 217     'cli_root/zfs_share/zfs_share_concurrent_shares': ['FAIL', known_reason],
 218     'cli_root/zfs_snapshot/zfs_snapshot_002_neg': ['FAIL', known_reason],
 219     'cli_root/zfs_unshare/zfs_unshare_006_pos': ['SKIP', na_reason],
 220     'cli_root/zpool_add/zpool_add_004_pos': ['FAIL', known_reason],
 221     'cli_root/zpool_destroy/zpool_destroy_001_pos': ['SKIP', 6145],
 222     'cli_root/zpool_import/zpool_import_missing_003_pos': ['SKIP', 6839],
 223     'cli_root/zpool_initialize/zpool_initialize_import_export':
 224         ['FAIL', 11948],
 225     'cli_root/zpool_labelclear/zpool_labelclear_removed':
 226         ['FAIL', known_reason],
 227     'cli_root/zpool_trim/setup': ['SKIP', trim_reason],
 228     'cli_root/zpool_upgrade/zpool_upgrade_004_pos': ['FAIL', 6141],
 229     'delegate/setup': ['SKIP', exec_reason],
 230     'fallocate/fallocate_punch-hole': ['SKIP', fspacectl_reason],
 231     'history/history_004_pos': ['FAIL', 7026],
 232     'history/history_005_neg': ['FAIL', 6680],
 233     'history/history_006_neg': ['FAIL', 5657],
 234     'history/history_008_pos': ['FAIL', known_reason],
 235     'history/history_010_pos': ['SKIP', exec_reason],
 236     'io/mmap': ['SKIP', fio_reason],
 237     'largest_pool/largest_pool_001_pos': ['FAIL', known_reason],
 238     'mmp/mmp_on_uberblocks': ['FAIL', known_reason],
 239     'pam/setup': ['SKIP', "pamtester might be not available"],
 240     'pool_checkpoint/checkpoint_discard_busy': ['FAIL', 11946],
 241     'projectquota/setup': ['SKIP', exec_reason],
 242     'removal/removal_condense_export': ['FAIL', known_reason],
 243     'renameat2/setup': ['SKIP', renameat2_reason],
 244     'reservation/reservation_008_pos': ['FAIL', 7741],
 245     'reservation/reservation_018_pos': ['FAIL', 5642],
 246     'snapshot/clone_001_pos': ['FAIL', known_reason],
 247     'snapshot/snapshot_009_pos': ['FAIL', 7961],
 248     'snapshot/snapshot_010_pos': ['FAIL', 7961],
 249     'snapused/snapused_004_pos': ['FAIL', 5513],
 250     'tmpfile/setup': ['SKIP', tmpfile_reason],
 251     'trim/setup': ['SKIP', trim_reason],
 252     'upgrade/upgrade_projectquota_001_pos': ['SKIP', project_id_reason],
 253     'user_namespace/setup': ['SKIP', user_ns_reason],
 254     'userquota/setup': ['SKIP', exec_reason],
 255     'vdev_zaps/vdev_zaps_004_pos': ['FAIL', known_reason],
 256     'zvol/zvol_ENOSPC/zvol_ENOSPC_001_pos': ['FAIL', 5848],
 257 }
 258
 259 if sys.platform.startswith('freebsd'):
 260     maybe.update({
 261         'cli_root/zfs_copies/zfs_copies_002_pos': ['FAIL', known_reason],
 262         'cli_root/zfs_inherit/zfs_inherit_001_neg': ['FAIL', known_reason],
 263         'cli_root/zpool_import/zpool_import_012_pos': ['FAIL', known_reason],
 264         'delegate/zfs_allow_003_pos': ['FAIL', known_reason],
 265         'inheritance/inherit_001_pos': ['FAIL', 11829],
 266         'pool_checkpoint/checkpoint_big_rewind': ['FAIL', 12622],
 267         'pool_checkpoint/checkpoint_indirect': ['FAIL', 12623],
 268         'resilver/resilver_restart_001': ['FAIL', known_reason],
 269         'snapshot/snapshot_002_pos': ['FAIL', '14831'],
 270     })
 271 elif sys.platform.startswith('linux'):
 272     maybe.update({
 273         'bclone/bclone_crossfs_corner_cases': ['SKIP', cfr_cross_reason],
 274         'bclone/bclone_crossfs_corner_cases_limited':
 275             ['SKIP', cfr_cross_reason],
 276         'bclone/bclone_crossfs_data': ['SKIP', cfr_cross_reason],
 277         'bclone/bclone_crossfs_embedded': ['SKIP', cfr_cross_reason],
 278         'bclone/bclone_crossfs_hole': ['SKIP', cfr_cross_reason],
 279         'bclone/bclone_diffprops_all': ['SKIP', cfr_cross_reason],
 280         'bclone/bclone_diffprops_checksum': ['SKIP', cfr_cross_reason],
 281         'bclone/bclone_diffprops_compress': ['SKIP', cfr_cross_reason],
 282         'bclone/bclone_diffprops_copies': ['SKIP', cfr_cross_reason],
 283         'bclone/bclone_diffprops_recordsize': ['SKIP', cfr_cross_reason],
 284         'bclone/bclone_prop_sync': ['SKIP', cfr_cross_reason],
 285         'bclone/bclone_samefs_corner_cases': ['SKIP', cfr_reason],
 286         'bclone/bclone_samefs_corner_cases_limited': ['SKIP', cfr_reason],
 287         'bclone/bclone_samefs_data': ['SKIP', cfr_reason],
 288         'bclone/bclone_samefs_embedded': ['SKIP', cfr_reason],
 289         'bclone/bclone_samefs_hole': ['SKIP', cfr_reason],
 290         'block_cloning/block_cloning_copyfilerange':
 291             ['SKIP', cfr_reason],
 292         'block_cloning/block_cloning_copyfilerange_cross_dataset':
 293             ['SKIP', cfr_cross_reason],
 294         'block_cloning/block_cloning_copyfilerange_fallback':
 295             ['SKIP', cfr_reason],
 296         'block_cloning/block_cloning_copyfilerange_fallback_same_txg':
 297             ['SKIP', cfr_cross_reason],
 298         'block_cloning/block_cloning_copyfilerange_partial':
 299             ['SKIP', cfr_reason],
 300         'block_cloning/block_cloning_cross_enc_dataset':
 301             ['SKIP', cfr_cross_reason],
 302         'block_cloning/block_cloning_disabled_copyfilerange':
 303             ['SKIP', cfr_reason],
 304         'block_cloning/block_cloning_lwb_buffer_overflow':
 305             ['SKIP', cfr_reason],
 306         'block_cloning/block_cloning_replay':
 307             ['SKIP', cfr_reason],
 308         'block_cloning/block_cloning_replay_encrypted':
 309             ['SKIP', cfr_reason],
 310         'cli_root/zfs_rename/zfs_rename_002_pos': ['FAIL', known_reason],
 311         'cli_root/zpool_reopen/zpool_reopen_003_pos': ['FAIL', known_reason],
 312         'fault/auto_online_002_pos': ['FAIL', 11889],
 313         'fault/auto_replace_001_pos': ['FAIL', 14851],
 314         'fault/auto_spare_002_pos': ['FAIL', 11889],
 315         'fault/auto_spare_multiple': ['FAIL', 11889],
 316         'fault/auto_spare_shared': ['FAIL', 11889],
 317         'fault/decompress_fault': ['FAIL', 11889],
 318         'idmap_mount/idmap_mount_001': ['SKIP', idmap_reason],
 319         'idmap_mount/idmap_mount_002': ['SKIP', idmap_reason],
 320         'idmap_mount/idmap_mount_003': ['SKIP', idmap_reason],
 321         'idmap_mount/idmap_mount_004': ['SKIP', idmap_reason],
 322         'idmap_mount/idmap_mount_005': ['SKIP', idmap_reason],
 323         'io/io_uring': ['SKIP', 'io_uring support required'],
 324         'limits/filesystem_limit': ['SKIP', known_reason],
 325         'limits/snapshot_limit': ['SKIP', known_reason],
 326         'mmp/mmp_active_import': ['FAIL', known_reason],
 327         'mmp/mmp_exported_import': ['FAIL', known_reason],
 328         'mmp/mmp_inactive_import': ['FAIL', known_reason],
 329         'zvol/zvol_misc/zvol_misc_fua': ['SKIP', 14872],
 330         'zvol/zvol_misc/zvol_misc_snapdev': ['FAIL', 12621],
 331         'zvol/zvol_misc/zvol_misc_trim': ['SKIP', 14872],
 332         'zvol/zvol_misc/zvol_misc_volmode': ['FAIL', known_reason],
 333     })
 334
 335 # Not all Github actions runners have scsi_debug module, so we may skip
 336 #   some tests which use it.
 337 if os.environ.get('CI') == 'true':
 338     known.update({
 339         'cli_root/zpool_expand/zpool_expand_001_pos': ['SKIP', ci_reason],
 340         'cli_root/zpool_expand/zpool_expand_003_neg': ['SKIP', ci_reason],
 341         'cli_root/zpool_expand/zpool_expand_005_pos': ['SKIP', ci_reason],
 342         'cli_root/zpool_reopen/setup': ['SKIP', ci_reason],
 343         'cli_root/zpool_reopen/zpool_reopen_001_pos': ['SKIP', ci_reason],
 344         'cli_root/zpool_reopen/zpool_reopen_002_pos': ['SKIP', ci_reason],
 345         'cli_root/zpool_reopen/zpool_reopen_003_pos': ['SKIP', ci_reason],
 346         'cli_root/zpool_reopen/zpool_reopen_004_pos': ['SKIP', ci_reason],
 347         'cli_root/zpool_reopen/zpool_reopen_005_pos': ['SKIP', ci_reason],
 348         'cli_root/zpool_reopen/zpool_reopen_006_neg': ['SKIP', ci_reason],
 349         'cli_root/zpool_reopen/zpool_reopen_007_pos': ['SKIP', ci_reason],
 350         'cli_root/zpool_split/zpool_split_wholedisk': ['SKIP', ci_reason],
 351         'fault/auto_offline_001_pos': ['SKIP', ci_reason],
 352         'fault/auto_online_001_pos': ['SKIP', ci_reason],
 353         'fault/auto_online_002_pos': ['SKIP', ci_reason],
 354         'fault/auto_replace_001_pos': ['SKIP', ci_reason],
 355         'fault/auto_replace_002_pos': ['SKIP', ci_reason],
 356         'fault/auto_spare_ashift': ['SKIP', ci_reason],
 357         'fault/auto_spare_shared': ['SKIP', ci_reason],
 358         'procfs/pool_state': ['SKIP', ci_reason],
 359     })
 360
 361     maybe.update({
 362         'events/events_002_pos': ['FAIL', 11546],
 363     })
 364
 365
 366 def process_results(pathname):
 367     try:
 368         f = open(pathname)
 369     except IOError as e:
 370         print('Error opening file:', e)
 371         sys.exit(1)
 372
 373     prefix = '/zfs-tests/tests/(?:functional|perf/regression)/'
 374     pattern = \
 375         r'^Test(?:\s+\(\S+\))?:' + \
 376         rf'\s*\S*{prefix}(\S+)' + \
 377         r'\s*\(run as (\S+)\)\s*\[(\S+)\]\s*\[(\S+)\]'
 378     pattern_log = r'^\s*Log directory:\s*(\S*)'
 379
 380     d = {}
 381     logdir = 'Could not determine log directory.'
 382     for line in f.readlines():
 383         m = re.match(pattern, line)
 384         if m and len(m.groups()) == 4:
 385             d[m.group(1)] = m.group(4)
 386             continue
 387
 388         m = re.match(pattern_log, line)
 389         if m:
 390             logdir = m.group(1)
 391
 392     return d, logdir
 393
 394
 395 class ListMaybesAction(argparse.Action):
 396     def __init__(self,
 397                  option_strings,
 398                  dest="SUPPRESS",
 399                  default="SUPPRESS",
 400                  help="list flaky tests and exit"):
 401         super(ListMaybesAction, self).__init__(
 402             option_strings=option_strings,
 403             dest=dest,
 404             default=default,
 405             nargs=0,
 406             help=help)
 407
 408     def __call__(self, parser, namespace, values, option_string=None):
 409         for test in maybe:
 410             print(test)
 411         sys.exit(0)
 412
 413
 414 if __name__ == "__main__":
 415     parser = argparse.ArgumentParser(description='Analyze ZTS logs')
 416     parser.add_argument('logfile')
 417     parser.add_argument('--list-maybes', action=ListMaybesAction)
 418     parser.add_argument('--no-maybes', action='store_false', dest='maybes')
 419     args = parser.parse_args()
 420
 421     results, logdir = process_results(args.logfile)
 422
 423     if not results:
 424         print("\n\nNo test results were found.")
 425         print("Log directory:", logdir)
 426         sys.exit(0)
 427
 428     expected = []
 429     unexpected = []
 430     all_maybes = True
 431
 432     for test in list(results.keys()):
 433         if results[test] == "PASS":
 434             continue
 435
 436         setup = test.replace(os.path.basename(test), "setup")
 437         if results[test] == "SKIP" and test != setup:
 438             if setup in known and known[setup][0] == "SKIP":
 439                 continue
 440             if setup in maybe and maybe[setup][0] == "SKIP":
 441                 continue
 442
 443         if (test in known and results[test] in known[test][0]):
 444             expected.append(test)
 445         elif test in maybe and results[test] in maybe[test][0]:
 446             if results[test] == 'SKIP' or args.maybes:
 447                 expected.append(test)
 448             elif not args.maybes:
 449                 unexpected.append(test)
 450         else:
 451             unexpected.append(test)
 452             all_maybes = False
 453
 454     print("\nTests with results other than PASS that are expected:")
 455     for test in sorted(expected):
 456         issue_url = 'https://github.com/openzfs/zfs/issues/'
 457
 458         # Include the reason why the result is expected, given the following:
 459         # 1. Suppress test results which set the "Not applicable" reason.
 460         # 2. Numerical reasons are assumed to be GitHub issue numbers.
 461         # 3. When an entire test group is skipped only report the setup reason.
 462         if test in known:
 463             if known[test][1] == na_reason:
 464                 continue
 465             elif isinstance(known[test][1], int):
 466                 expect = f"{issue_url}{known[test][1]}"
 467             else:
 468                 expect = known[test][1]
 469         elif test in maybe:
 470             if isinstance(maybe[test][1], int):
 471                 expect = f"{issue_url}{maybe[test][1]}"
 472             else:
 473                 expect = maybe[test][1]
 474         elif setup in known and known[setup][0] == "SKIP" and setup != test:
 475             continue
 476         elif setup in maybe and maybe[setup][0] == "SKIP" and setup != test:
 477             continue
 478         else:
 479             expect = "UNKNOWN REASON"
 480         print(f"    {results[test]} {test} ({expect})")
 481
 482     print("\nTests with result of PASS that are unexpected:")
 483     for test in sorted(known.keys()):
 484         # We probably should not be silently ignoring the case
 485         # where "test" is not in "results".
 486         if test not in results or results[test] != "PASS":
 487             continue
 488         print(f"    {results[test]} {test} (expected {known[test][0]})")
 489
 490     print("\nTests with results other than PASS that are unexpected:")
 491     for test in sorted(unexpected):
 492         expect = "PASS" if test not in known else known[test][0]
 493         print(f"    {results[test]} {test} (expected {expect})")
 494
 495     if len(unexpected) == 0:
 496         sys.exit(0)
 497     elif not args.maybes and all_maybes:
 498         sys.exit(2)
 499     else:
 500         sys.exit(1)