On Mon, 02 Aug 2010 23:27:37 +0200, Zdenek Maxa wrote: > I need to start a process (using subprocess.Popen()) and wait until the > new process either fails or successfully binds a specified port. The > fuser command seems to be indented exactly for this purpose. Could > anyone please provided a hint to a handy Python library to do this or > would the advice be to parse fuser command output? > > This needs to happen on Linux and Python 2.4.
fuser (when applied to a TCP socket) scans /proc/net/tcp to obtain the inode number, then scans /proc/[1-9]*/fd/* for a reference to the inode. This requires sufficient privileges to enumerate the /proc/<pid>/fd directories (i.e. if you aren't running as root, fuser will ignore any processes which you don't own). If you just need to wait until *something* is listening on that port, you could try connect()ing to it. Alternatively, you can monitor /proc/net/tcp until the relevant port appears. If you know which process will be using the port, you can just scan the /proc/<pid>/fd directory for that process, rather than checking all processes. You still need to use /proc/net/tcp to obtain the inode number. -- http://mail.python.org/mailman/listinfo/python-list
