| 1 | import signal |
| 2 | import hashlib |
| 3 | import os |
| 4 | import time |
| 5 | |
| 6 | def line_count(file_path): |
| 7 | line_count = 0 |
| 8 | with open(file_path) as f: |
| 9 | for line in f: |
| 10 | line_count += 1 |
| 11 | return line_count |
| 12 | |
| 13 | |
| 14 | def sha256_checksum(filename, block_size=65536): |
| 15 | sha256 = hashlib.sha256() |
| 16 | with open(filename, 'rb') as f: |
| 17 | for block in iter(lambda: f.read(block_size), b''): |
| 18 | sha256.update(block) |
| 19 | return sha256.hexdigest() |
| 20 | |
| 21 | |
| 22 | # TODO: timeout as a parameter or Settings |
| 23 | # TODO: Custom exception |
| 24 | def wait_for_file(path): |
| 25 | i = 0 |
| 26 | timeout = 60 |
| 27 | while not os.path.exists(path): |
| 28 | time.sleep(1) |
| 29 | i = i + 1 |
| 30 | if i > timeout: |
| 31 | raise Exception("File still does not exists. Timeout expired") |
| 32 | |
| 33 | |
| 34 | # TODO: find better exception |
| 35 | def create_empty_file(path): |
| 36 | if os.path.exists(path): |
| 37 | raise Exception("Path already exist") |
| 38 | open(path, 'w').close() |
| 39 | |
| 40 | |
| 41 | def __dummy_sigusr1_handler(): |
| 42 | pass |
| 43 | |
| 44 | |
| 45 | def sessiond_spawn(runtime): |
| 46 | previous_handler = signal.signal(signal.SIGUSR1, __dummy_sigusr1_handler) |
| 47 | sessiond = runtime.spawn_subprocess("lttng-sessiond -vvv -S") |
| 48 | signal.sigtimedwait({signal.SIGUSR1}, 60) |
| 49 | previous_handler = signal.signal(signal.SIGUSR1, previous_handler) |
| 50 | return sessiond |
| 51 | |
| 52 | |
| 53 | |