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traffic: reinitialise RNG in each child

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Otherwise they all replay using the same random sequence.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This commit is contained in:
Douglas Bagnall 2018-11-22 12:19:46 +13:00 committed by Douglas Bagnall
parent 6268effb11
commit 35bc6ee0a1
1 changed files with 8 additions and 2 deletions
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10
python/samba/emulate/traffic.py
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@ -1442,7 +1442,12 @@ def flushing_signal_handler(signal, frame):
def replay_seq_in_fork(cs, start, context, account, client_id, server_id=1):
"""Fork a new process and replay the conversation sequence."""
endpoints = (server_id, client_id)
# We will need to reseed the random number generator or all the
# clients will end up using the same sequence of random
# numbers. random.randint() is mixed in so the initial seed will
# have an effect here.
seed = client_id * 1000 + random.randint(0, 999)
# flush our buffers so messages won't be written by both sides
sys.stdout.flush()
sys.stderr.flush()
@ -1453,8 +1458,9 @@ def replay_seq_in_fork(cs, start, context, account, client_id, server_id=1):
# we must never return, or we'll end up running parts of the
# parent's clean-up code. So we work in a try...finally, and
# try to print any exceptions.
try:
random.seed(seed)
endpoints = (server_id, client_id)
status = 0
t = cs[0][0]
c = Conversation(t, endpoints, seq=cs, conversation_id=client_id)