Re: [Help-bash] readline does not always handle SIGTERM on reboot

[Chet Ramey]

On 4/9/18 12:55 PM, john smith wrote:

>> I don't run busybox, so I won't speculate. My first guess would be that
>> the signal comes in while bash is ignoring SIGTERM (by catching the signal
>> and discarding it).
> 
> I've analyzed bash and readline during the weekend and I learned that
> readline() overwrites bash SIGTERM handler and restores it after it
> finishes, this is why `kill $$' does not kill the current session but
> `(sleep 1; kill $$) &' does.  

You left out the part where readline resends the signal to the calling
application, assuming the calling application hasn't set the signal
handler to SIG_IGN (in which case readline would not install a handler
for it at all).


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