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# -*- coding: utf-8 -*-
"""
capture
~~~~~~~
An example showing how to capure output from a running terminal app.
:copyright: (c) 2015 by pyte authors and contributors,
see AUTHORS for details.
:license: LGPL, see LICENSE for more details.
"""
from __future__ import print_function, unicode_literals
import os
import pty
import signal
import select
import sys
if __name__ == "__main__":
try:
output_path, *argv = sys.argv[1:]
except ValueError:
sys.exit("usage: %prog% output command [args]")
p_pid, master_fd = pty.fork()
if p_pid == 0: # Child.
os.execvpe(argv[0], argv,
env=dict(TERM="linux", COLUMNS="80", LINES="24"))
with open(output_path, "wb") as handle:
while True:
try:
[_master_fd], _wlist, _xlist = select.select(
[master_fd], [], [], 1)
except (KeyboardInterrupt, # Stop right now!
ValueError): # Nothing to read.
break
else:
data = os.read(master_fd, 1024)
if not data:
break
handle.write(data)
os.kill(p_pid, signal.SIGTERM)
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