lttng_ivc/utils/utils.py

   1 import signal
   2 import hashlib
   3
   4 def line_count(file_path):
   5     line_count = 0
   6     with open(file_path) as f:
   7         for line in f:
   8             line_count += 1
   9     return line_count
  10
  11
  12 def sha256_checksum(filename, block_size=65536):
  13     sha256 = hashlib.sha256()
  14     with open(filename, 'rb') as f:
  15         for block in iter(lambda: f.read(block_size), b''):
  16             sha256.update(block)
  17     return sha256.hexdigest()
  18
  19
  20 def __dummy_sigusr1_handler():
  21     pass
  22
  23
  24 def sessiond_spawn(runtime):
  25     previous_handler = signal.signal(signal.SIGUSR1, __dummy_sigusr1_handler)
  26     sessiond = runtime.spawn_subprocess("lttng-sessiond -vvv -S")
  27     signal.sigtimedwait({signal.SIGUSR1}, 60)
  28     previous_handler = signal.signal(signal.SIGUSR1, previous_handler)
  29     return sessiond
  30
  31
  32