On Tue, Jun 13, 2017 at 11:00 AM, L A Walsh <b...@tlinx.org> wrote: > > In this case you need to use "-n" with "-f" OR not use > either if you wish it to be suspended. >
I did want the `ssh -o ControlMaster=yes` to run as a daemon. > If I launch ssh without "-f" but put it in background, it doesn't > grab the foreground terminal (and the DOES get suspended when it > tries to do input). > > Please see my explanation @stackoverflow: >> https://stackoverflow.com/questions/44492312/ . >> >> > Seems to be saying similar -- that the demonizing process needs > to be disconnected from stdin. > `-f` implies `-n` so it is effectively disconnected from the tty (though it's still opening the tty device with FDs 0, 1, 2 but it would never read from FD 0). The magic part here is it's the 2nd `ssh ... sleep` that asks the 1st `ssh -o ControlMaster=yes` to open (by passing the FDs to it) the tty again (with new FDs) and read from it. > It doesn't mention that you can have it be suspended > (as you seemed to expect), by not having it daemonize. > As I mentioned ealier, I don't want the `ssh -o ControlMaster=yes` to be suspended. -clark
