def kill_cmd(self):
if self.cmd_pid > 1:
try:
os.close(self.cmd_fd)
except OSError, e:
if e.errno == errno.EBADF:
pass # already closed
else:
raise e
try:
os.kill(self.cmd_pid, signal.SIGKILL)
os.waitpid(self.cmd_pid, 0)
except OSError, e:
if e.errno not in [errno.ECHILD, errno.ESRCH]:
raise Exception('unhandled errno: %d' % e.errno)
self.cmd_pid = -1
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