And to answer the implied question - C-Z isn't a fish thing, it's a tty driver thing. It sends a TSTP signal to the controlling process. The default action is to suspend the process, and transfer control back to the first ancestor does some kind of job control. But you can get the same effect with a kill -STOP. Job control is the fish feature you just demonstrated. On Tue, Aug 4, 2015 at 3:08 AM Mike Meyer <m...@mired.org> wrote:
> On Tue, Aug 4, 2015 at 2:14 AM Diego Zamboni <di...@zzamboni.org> wrote: > >> Hi Mike, >> >> There doesn't seem to be a way to suspend a fish shell, ala the "suspend" >> builtin in zsh, bash, etc. I'm wondering if this is a bug, and C-Z should >> work (except in a login shell), or if it's a design feature. or if no one >> has asked for it? >> >> >> It works for me: >> >> diego@cuper➜ sleep 50 >> <press Ctrl-Z> >> 'sleep 50' has stopped >> diego@cuper➜ jobs >> Job Group State Command >> 1 53568 stopped sleep 50 >> diego@cuper➜ bg >> Send job 1 'sleep 50' to background >> diego@cuper➜ fg >> Send job 1, 'sleep 50' to foreground >> ^C~ >> > > That's not suspending the shell, the shell, that's suspending to the > shell. Using bash as an example, since fish apparently doesn't do this: > > bhuda% bash > [mwm@bhuda ~/src/chiselapp/straight]$ pwd > /export/mwm/src/chiselapp/straight > [mwm@bhuda ~/src/chiselapp/straight]$ jobs > [mwm@bhuda ~/src/chiselapp/straight]$ suspend > 'bash' has stopped > bhuda% jobs > ~/src/chiselapp/straight|fs:trunk@75f77 > Job Group State Command > 1 27193 stopped bash > bhuda% > > See the difference? Being able to suspend a shell is a pretty standard > feature: > > bhuda% jobs > Job Group State Command > 5 27790 stopped bltsh > 4 27719 stopped zsh > 3 27702 stopped bash > 2 27684 stopped csh > 1 27666 stopped tcsh > bhuda% > > The only other shell I could find that couldn't be suspended was /bin/sh, > which is based on ash. > > Most programs that aren't shells will catch C-Z to suspend, but the only > one of the above that does that is bltsh, and it's really more a tcl > interpreter than a shell. The others all have a "suspend" command that > suspends them back to whatever program launched them. Unless they're a > login shell, in which case it's usually disabled. >
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