Michael Felt added the comment:
Curious.
First pass: using python2.7.12 also hanged as program, on the close()
second pass: interactive - do the read first, then the close - seems to work:
root@x064:[/data/prj/python/issues/29545]cat hello.py
#!/usr/bin/env python
import errno
import os
import pty
from subprocess import Popen, STDOUT
master_fd, slave_fd = pty.openpty()
proc = Popen(['./hello'],stdout=slave_fd, close_fds=True)
os.close(slave_fd)
data = os.read(master_fd, 512)
print('got ' + repr(data))
root@x064:[/data/prj/python/issues/29545]python
Python 2.7.12 (default, Sep 29 2016, 12:02:17) [C] on aix5
Type "help", "copyright", "credits" or "license" for more information.
>>> import errno
import os
import pty
from subprocess import Popen, STDOUT
>>> >>> >>> >>>
>>> master_fd, slave_fd = pty.openpty()
>>> master_fd
3
>>> slave_fd
4
>>> proc = Popen(['./hello'],stdout=slave_fd, close_fds=True)
>>> data = os.read(master_fd, 512)
>>> datat
'hello world\r\n'
>>> os.close(slave_fd)
>>> print (got '
File "<stdin>", line 1
print (got '
^
SyntaxError: EOL while scanning string literal
>>> print('got ' + repr(data))
got 'hello world\r\n'
>>> quit()
pass 3:
swap the close() and the read() and the program works fine.
"hello.py" 11 lines, 265 characters
root@x064:[/data/prj/python/issues/29545]cat hello.py
#!/usr/bin/env python
import errno
import os
import pty
from subprocess import Popen, STDOUT
master_fd, slave_fd = pty.openpty()
proc = Popen(['./hello'],stdout=slave_fd, close_fds=True)
data = os.read(master_fd, 512)
os.close(slave_fd)
print('got ' + repr(data))
root@x064:[/data/prj/python/issues/29545]./hello.py
got 'hello world\r\n'
root@x064:[/data/prj/python/issues/29545]
----------
nosy: +aixto...@gmail.com
_______________________________________
Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue29545>
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