Re: rl_startup_hook is called before readline prints every prompt

[Chet Ramey]

On 12/15/23 10:25 AM, 林宏雄 wrote:

>  >> Variable: rl_hook_func_t * rl_startup_hook
>  >> If non-zero, this is the address of a function to call just before 
> readline prints the first prompt.
>
> I didn't even know that the readline() function may print prompt more than 
> once.

Redisplay can cause the prompt to be printed multiple times; including the
editing mode in the prompt will result in it being redisplayed every time
you switch editing modes; switching to and from incremental search mode
will cause the prompt to be redisplayed; and entering a numeric argument
for a readline command will cause the prompt to change and then the
original to be redisplayed. These are just the examples I could think of
right now.

--
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/

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