def test_shell_scipt_with_fork(self):
with TemporaryDirectory() as tmpdir:
script = Path(tmpdir, 'hello.sh')
with script.open('w') as f:
f.write(self.shell_script_with_fork)
script.chmod(0o755)
argv = [script.as_posix()]
actual = self.run_trace(argv)
# split into two lists, one for each PID
pids = {}
for pid, event, args in actual:
pids.setdefault(pid, []).append((pid, event, args))
self.assertEqual(len(pids), 2)
ppid, cpid = sorted(pids.keys()) # parent PID < child PID
dmesg_checks = []
for p in test_utils.do_sh_path_lookup('dmesg'):
dmesg_checks.append(('check', (p.as_posix(), p.exists())))
last = dmesg_checks.pop()
assert last[1][1] is True
dmesg_checks.extend([last] * 10)
# Check events generated by sh process
self.check_events(pids[ppid], ppid, argv, INIT_SH + [
('read', (script.as_posix(),)),
('check', ('.', True)),
] + dmesg_checks + [
('fork', (cpid,)),
])
# Check events generated by dmesg process
# sh applies the following env changes to its subprocesses
env = test_utils.modified_env(os.environ, {
'_': p.as_posix(),
'SHLVL': str(int(os.environ.get('SHLVL', 0)) + 1),
'OLDPWD': None, # delete
'PS1': None, # delete
})
self.check_events(
pids[cpid], cpid, ['dmesg'], INIT_C_LOCALE + [
('read', ('/dev/kmsg',)),
], env=env)
def path_lookup(self, name, only_missing=False):
for path in test_utils.do_sh_path_lookup(name, self.env['PATH']):
if not only_missing or not path.exists():
self.check(path, path.exists())
return path
