On Tue, May 08, 2018 at 12:49:40PM +0200, G.raud wrote: Hi,
> $ mksh -m -c 'fg' > mksh: fg: job control not enabled > $ mksh -c 'set -m; fg' > mksh: fg: %%: no such job There is indeed no job to get from the the process' background: $ mksh -c 'set -m; sleep 1 & fg' \sleep 1 > $ ksh -m -c 'xclock& sleep 2' > ^Z[1] + Stopped ksh -m -c "xclock& sleep 2" > $ # xclock is not refreshed > $ fg Ctrl+Z sends a SIGTSTP (not a SIGSTOP) to the ksh's process group, 'xclock' hence stops. Take care, Seb.