2015-12-15 09:01:05 -0500, Chet Ramey: [...] > > Mind explaining this one? > > I can't seem to write to HISTFILE in a non-interactive shell, or am i > > missing something? > > You just need to enable history (set -o history). History is independent > of whether or not the shell is interactive; it's just enabled by default > in interactive shells. [...]
BTW: $ bash -o history -o histexpand -c 'echo !!' !! $ bash -o history -o histexpand <<< 'echo !!' !! $ SHELLOPTS=history:histexpand bash -c 'echo !!' !! $ SHELLOPTS=history:histexpand bash <<< 'echo !!' bash: line 1: !!: event not found $ SHELLOPTS=history:histexpand bash <(<<<'echo !!') /proc/self/fd/11: line 1: !!: event not found $ bash -o history -o histexpand <(<<< 'echo !!') !! (also note that when there is an error, the exit status is 0) -- Stephane
