in emacs search-history mode, abort if ^@ is encountered
This has been bugging me for ages, and I finally realized it was me
accidentally pressing Ctrl+<space>, rendering ^@ (a.k.a '\0' or NUL)
Easily tested with: Ctrl+R Ctrl+<space> ...
Minimal investigation, for reference:
bash: misbehaves in a slightly different manner
zsh: behaviour matches this fix
OK?
Index: emacs.c
===================================================================
RCS file: /cvs/src/bin/ksh/emacs.c,v
retrieving revision 1.88
diff -u -p -r1.88 emacs.c
--- emacs.c 27 Jun 2021 15:53:33 -0000 1.88
+++ emacs.c 13 Sep 2021 21:42:37 -0000
@@ -897,7 +897,7 @@ x_search_hist(int c)
if ((c = x_e_getc()) < 0)
return KSTD;
f = kb_find_hist_func(c);
- if (c == CTRL('[')) {
+ if (c == CTRL('[') || c == CTRL('@')) {
x_e_ungetc(c);
break;
} else if (f == x_search_hist)
