It seems that BusyBox v1.27.2 doesn't load history from a history file
when ENABLE_FEATURE_EDITING_SAVEHISTORY is not set.
I think that the corresponding source code logic is here:
<https://git.busybox.net/busybox/tree/shell/ash.c#n13950>
Such logic doesn't match the feature name, which is ...SAVEHISTORY and
not ...LOADHISTORY.
For example:
Busybox is often used in (emergency/disaster) recovery environments.
There is no need for any saving (readonly media). However it comes handy
when frequently used commands can be pre-loaded into the initramfs (for
interactive logins).
Is such a loadhistory-without-savehistory scenario tackled when changing:
#if MAX_HISTORY > 0 && ENABLE_FEATURE_EDITING_SAVEHISTORY
to
#if MAX_HISTORY > 0
in ash.c?
In case it is not, what more to change to allow loading a HISTFILE when
ENABLE_FEATURE_EDITING_SAVEHISTORY is not set?
Is such a change a candidate for an upstream patch?
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