RE: send_file()

Thanks for the info on EPIPE.  When the EPIPE occurs during socket send()
or send_file(), the PPP connection remains alive, and I can simply
reestablish another socket.

Yet sometimes the underlying PPP connection drops during a socket send() or
send_file(), and my program waits infinitely on the send() or send_file().
No EPIPE or any signal occurs.  When this PPP disconnection happens, how
can I get a signal interrupt into the send() or send_file(), so the program
can take corrective measures?

By the way I have select() before send(), but that makes no difference.
The program passes through select() okay, yet still waits infinitely in
send() if the PPP connection drops during send().