subprocess (spawned by os.system) inherits open TCP/UDP/IP port
ask at me
Fri Jul 20 15:15:39 CEST 2007
Jean-Paul Calderone wrote:
> You can avoid this, if you like. Set FD_CLOEXEC on the socket after you
> open it, before you call os.system:
> old = fcntl.fcntl(s.fileno(), fcntl.F_GETFD)
> fcntl.fcntl(s.fileno(), fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
thx for responding (I was about to send the question to twisted mailing
list too ;-).
still would like to find out why it is happening (now FD_CLOEXEC
narrowed may yahooing/googling searches). While realize that file
descriptors are shared by forked processes it is still weird why the
port moves to the child process once parent gets killed. what it the
parent got multiple subprocesses.
Plus it is kind of unintuitive os.system does not protect from such
behavoir which is for me more an equivalent of like issuing a ne
wcommand/ starting a process from the shell.
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