58 lines
2.1 KiB
Python
58 lines
2.1 KiB
Python
import os
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from signal import SIGCONT
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import pytest
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from testing import print_signals
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from testing import process_state
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from testing import sleep_until
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from testing import SUSPEND_SIGNALS
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@pytest.mark.usefixtures('both_debug_modes', 'setsid_enabled')
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def test_shell_background_support_setsid():
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"""In setsid mode, dumb-init should suspend itself and its children when it
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receives SIGTSTP, SIGTTOU, or SIGTTIN.
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"""
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with print_signals() as (proc, pid):
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for signum in SUSPEND_SIGNALS:
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# both dumb-init and print_signals should be running or sleeping
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assert process_state(pid) in ['running', 'sleeping']
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assert process_state(proc.pid) in ['running', 'sleeping']
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# both should now suspend
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proc.send_signal(signum)
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def assert_both_stopped():
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assert process_state(proc.pid) == process_state(pid) == 'stopped'
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sleep_until(assert_both_stopped)
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# and then both wake up again
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proc.send_signal(SIGCONT)
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assert (
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proc.stdout.readline() == '{0}\n'.format(SIGCONT).encode('ascii')
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)
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assert process_state(pid) in ['running', 'sleeping']
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assert process_state(proc.pid) in ['running', 'sleeping']
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@pytest.mark.usefixtures('both_debug_modes', 'setsid_disabled')
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def test_shell_background_support_without_setsid():
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"""In non-setsid mode, dumb-init should forward the signals SIGTSTP,
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SIGTTOU, and SIGTTIN, and then suspend itself.
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"""
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with print_signals() as (proc, _):
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for signum in SUSPEND_SIGNALS:
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assert process_state(proc.pid) in ['running', 'sleeping']
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proc.send_signal(signum)
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assert proc.stdout.readline() == '{0}\n'.format(signum).encode('ascii')
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os.waitpid(proc.pid, os.WUNTRACED)
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assert process_state(proc.pid) == 'stopped'
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proc.send_signal(SIGCONT)
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assert (
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proc.stdout.readline() == '{0}\n'.format(SIGCONT).encode('ascii')
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)
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assert process_state(proc.pid) in ['running', 'sleeping']
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