sys.stdin.isatty() raise exception - ValueError: I/O operation on closed file

[seth1002]

Describe the bug
i cannot figure out reason, zelos python script will raise exception when it works with parallel sometimes. can you please take a look?
e.g. cat test.case.list | parallel -j 5 python base_test.py {}

src/zelos/handles/base_handles.py

15:56:16:syscall_ma:ERROR_:Error in thread 7401_thread_0 (0x7401), PRI: 0, parent: None, IP: 0x409370, blocks_exec'd: 0x0, ThreadState.RUNNING while executing syscall fork Args:
Traceback (most recent call last):
File "_ctypes/callbacks.c", line 232, in 'calling callback function'
File "/home//Envs/zelos/lib/python3.7/site-packages/unicorn-1.0.2rc1-py3.7-linux-x86_64.egg/unicorn/unicorn.py", line 494, in _hook_intr_cb
cb(self, intno, data)
File "/home//Envs/zelos/lib/python3.7/site-packages/zelos-0.1.1.dev0-py3.7.egg/zelos/hooks.py", line 638, in interrupt_hook_wrapper
self._hook_interrupt(self._z.api, intno)
File "/home//Envs/zelos/lib/python3.7/site-packages/zelos-0.1.1.dev0-py3.7.egg/zelos/hooks.py", line 677, in _hook_interrupt
handler(zelos.process)
File "/home//Envs/zelos/lib/python3.7/site-packages/zelos-0.1.1.dev0-py3.7.egg/zelos/ext/platforms/linux/syscall_manager.py", line 403, in syscall_handler_wrapper
self.handle_syscall(current_process)
File "/home//Envs/zelos/lib/python3.7/site-packages/zelos-0.1.1.dev0-py3.7.egg/zelos/ext/platforms/linux/syscall_manager.py", line 415, in handle_syscall
super(MIPSSyscallManager, self).handle_syscall(*args, kwargs)
File "/home//Envs/zelos/lib/python3.7/site-packages/zelos-0.1.1.dev0-py3.7.egg/zelos/ext/platforms/linux/syscall_manager.py", line 133, in handle_syscall
status = super(LinuxSyscallManager, self).handle_syscall(process)
File "/home//Envs/zelos/lib/python3.7/site-packages/zelos-0.1.1.dev0-py3.7.egg/zelos/plugin/syscall_manager_base.py", line 198, in handle_syscall
raise e
File "/home//Envs/zelos/lib/python3.7/site-packages/zelos-0.1.1.dev0-py3.7.egg/zelos/plugin/syscall_manager_base.py", line 188, in handle_syscall
retval = sys_fn(self, process)
File "/home//Envs/zelos/lib/python3.7/site-packages/zelos-0.1.1.dev0-py3.7.egg/zelos/ext/platforms/linux/syscalls/syscalls.py", line 1252, in sys_fork
child_process = _new_process(sm, p)
File "/home//Envs/zelos/lib/python3.7/site-packages/zelos-0.1.1.dev0-py3.7.egg/zelos/ext/platforms/linux/syscalls/syscalls.py", line 1258, in _new_process
child_pid = processes.new_process()
File "/home//Envs/zelos/lib/python3.7/site-packages/zelos-0.1.1.dev0-py3.7.egg/zelos/processes.py", line 338, in new_process
hook(process)
File "/home/**/Envs/zelos/lib/python3.7/site-packages/zelos-0.1.1.dev0-py3.7.egg/zelos/handles/base_handles.py", line 320, in init_handles
if not sys.stdin.isatty() and isinstance(
ValueError: I/O operation on closed file

[kvalakuzhyzp]

Thanks for filing the issue. I believe this should fix your problem.

[seth1002]

thank you!