2022年8月12日(金) 4:22 Chet Ramey <chet.ra...@case.edu>: > >> Often enough to make a difference? > > > > My `bind -x' functions use `LC_ALL=' and `LC_CTYPE=C' for every > > keystroke, for example, in combination with `builtin read'. They also > > use `LC_ALL=' for other purposes for mostly every keystroke. Some vi > > binding also uses `LC_CTYPE=C'. My completion functions also change > > `LC_ALL` and `LC_CTYPE`. For example, `LC_CTYPE=C' is used in > > calculating a PJW hash code of a given string. I haven't carefully > > checked, but there are probably other cases of changing `LC_CTYPE'. > > Also, `LC_ALL=' is used everywhere. > > So you're using `read -e'?
No. > Otherwise, these suggest that solution 4 is most appropriate. > > >> Across multiple calls to readline? > > > > I think I am missing the point. What does ``multiple calls to > > readline'' mean? Is the situation different from a single call to > > readline? > > It informs the solution. If I choose option 4, for instance, none of these > matter. Ah! Now I understand it. I was misunderstanding option 4. Option 4 works for me. > Where I think we're converging is to use option 4, and -- as long as > LC_ALL/LC_CTYPE/LANG don't change -- not modifying these variables when > readline() is called. I can document that these variables are dependent on > the current locale, and if the locale changes, those variables will need > to be adjusted. If the locale doesn't change between calls to readline(), > you don't need to do anything. I agree with option 4. Thank you for all your explanations. -- Can we also change the behavior of TERM in a similar way with option 4? Currently, a temporal change of TERM clears keybindings of some keys (home, end, right, left, etc.) even when the temporal change does not survive across multiple calls of readline: $ bash-dev --norc $ echo "$TERM" screen.xterm-256color $ bind '"\e[1~": bell' $ bind -q beginning-of-line beginning-of-line can be invoked via "\C-a", "\eOH", "\e[H". $ TERM=dumb infocmp >dumb.ti $ bind -q beginning-of-line beginning-of-line can be invoked via "\C-a", "\eOH", "\e[1~", "\e[H". There are only a few places where TERM can be changed in my configuration (unlike LANG/LC_* which are changed in many places), so I can work around them by saving and restoring the keybindings, yet I think it is more reasonable that automatic rebinding on TERM changes only happens when the change survives to the next call of readline (as option 4 for the locale variables). -- Koichi
