🚀 go-pugleaf

In article <45pc8d$r0i@agate.berkeley.edu>,
Ramon F Herrera <herrera@canaima.ME.Berkeley.EDU> wrote:
: Is there any way to tell kermit NOT to drop DTR when the user quits?
: 
: I am using kermit just to dial to an Internet Service Provider,
: and therefore after quitting, the phone call should not be dropped.
: 
: After kermit ends, I grab the IP address from the kermit log and
: start the SLIP daemon.
: 
: Later, when all Internet exchange is done, I need to tell the
: serial port to drop DTR so the modems hangs up.
: 
: I guess that if the port is set up with the HUPCL parameter,
: what I really need is to ask kermit not to close the file (port).
: 
: Should I look for this line, comment it out, and recompile kermit?:
: 
: close("/dev/tty0");
: 
: Or should I set the port to -HUPCL, run kermit, quit, and then change
: the setting to +HUPCL?
: 
: Any other suggestions or comments?
: 
Long question, short answer:

It is a fundamental property of UNIX that when a program exits, either
explicitly (_exit()) or implicitly, all of the files that is opened are
closed.  UNIX does this even if the program doesn't.

One way to accomplish what you want to do is to have a superior process
open the port, pass its file descriptor to Kermit (see the documentation),
and then when Kermit exits the superior process still has it open.

- Frank