| 1 | import signal |
| 2 | import hashlib |
| 3 | import os |
| 4 | import time |
| 5 | import socket |
| 6 | |
| 7 | from contextlib import closing |
| 8 | |
| 9 | def line_count(file_path): |
| 10 | line_count = 0 |
| 11 | with open(file_path) as f: |
| 12 | for line in f: |
| 13 | line_count += 1 |
| 14 | return line_count |
| 15 | |
| 16 | |
| 17 | def sha256_checksum(filename, block_size=65536): |
| 18 | sha256 = hashlib.sha256() |
| 19 | with open(filename, 'rb') as f: |
| 20 | for block in iter(lambda: f.read(block_size), b''): |
| 21 | sha256.update(block) |
| 22 | return sha256.hexdigest() |
| 23 | |
| 24 | |
| 25 | # TODO: timeout as a parameter or Settings |
| 26 | # TODO: Custom exception |
| 27 | def wait_for_file(path): |
| 28 | i = 0 |
| 29 | timeout = 60 |
| 30 | while not os.path.exists(path): |
| 31 | time.sleep(1) |
| 32 | i = i + 1 |
| 33 | if i > timeout: |
| 34 | raise Exception("File still does not exists. Timeout expired") |
| 35 | |
| 36 | |
| 37 | # TODO: find better exception |
| 38 | def create_empty_file(path): |
| 39 | if os.path.exists(path): |
| 40 | raise Exception("Path already exist") |
| 41 | open(path, 'w').close() |
| 42 | |
| 43 | |
| 44 | def __dummy_sigusr1_handler(): |
| 45 | pass |
| 46 | |
| 47 | |
| 48 | def sessiond_spawn(runtime): |
| 49 | agent_port = find_free_port() |
| 50 | previous_handler = signal.signal(signal.SIGUSR1, __dummy_sigusr1_handler) |
| 51 | sessiond = runtime.spawn_subprocess("lttng-sessiond -vvv -S --agent-tcp-port {}".format(agent_port)) |
| 52 | signal.sigtimedwait({signal.SIGUSR1}, 60) |
| 53 | previous_handler = signal.signal(signal.SIGUSR1, previous_handler) |
| 54 | return sessiond |
| 55 | |
| 56 | |
| 57 | def find_free_port(): |
| 58 | # There is no guarantee that the port will be free at runtime but should be |
| 59 | # good enough |
| 60 | with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as s: |
| 61 | s.bind(('', 0)) |
| 62 | return s.getsockname()[1] |
| 63 | |
| 64 | |
| 65 | def file_contains(stderr_file, list_of_string): |
| 66 | with open(stderr_file, 'r') as stderr: |
| 67 | for line in stderr: |
| 68 | for s in list_of_string: |
| 69 | if s in line: |
| 70 | return True |