1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
import os
from signal import SIGCONT
import pytest
from testing import print_signals
from testing import process_state
from testing import sleep_until
from testing import SUSPEND_SIGNALS
@pytest.mark.usefixtures('both_debug_modes', 'setsid_enabled')
def test_shell_background_support_setsid():
"""In setsid mode, dumb-init should suspend itself and its children when it
receives SIGTSTP, SIGTTOU, or SIGTTIN.
"""
with print_signals() as (proc, pid):
for signum in SUSPEND_SIGNALS:
# both dumb-init and print_signals should be running or sleeping
assert process_state(pid) in ['running', 'sleeping']
assert process_state(proc.pid) in ['running', 'sleeping']
# both should now suspend
proc.send_signal(signum)
def assert_both_stopped():
assert process_state(proc.pid) == process_state(pid) == 'stopped'
sleep_until(assert_both_stopped)
# and then both wake up again
proc.send_signal(SIGCONT)
assert (
proc.stdout.readline() == '{}\n'.format(SIGCONT).encode('ascii')
)
assert process_state(pid) in ['running', 'sleeping']
assert process_state(proc.pid) in ['running', 'sleeping']
@pytest.mark.usefixtures('both_debug_modes', 'setsid_disabled')
def test_shell_background_support_without_setsid():
"""In non-setsid mode, dumb-init should forward the signals SIGTSTP,
SIGTTOU, and SIGTTIN, and then suspend itself.
"""
with print_signals() as (proc, _):
for signum in SUSPEND_SIGNALS:
assert process_state(proc.pid) in ['running', 'sleeping']
proc.send_signal(signum)
assert proc.stdout.readline() == '{}\n'.format(signum).encode('ascii')
os.waitpid(proc.pid, os.WUNTRACED)
assert process_state(proc.pid) == 'stopped'
proc.send_signal(SIGCONT)
assert (
proc.stdout.readline() == '{}\n'.format(SIGCONT).encode('ascii')
)
assert process_state(proc.pid) in ['running', 'sleeping']
|
