Re: Segfault using HISTTIMEFORMAT

[Chet Ramey]

On 9/20/15 4:59 PM, rens@endoria.net wrote:
> When using HISTTIMEFORMAT and a timestamp which is out of range bash seems to 
> segfault. I've tested this with bash version 4.3.30(1)-release 
> (x86_64-pc-linux-gnu) on Debian 8 stable.
> 
> Here is how to reproduce:
> * Change (or add) a timestamp in .bash_history to:
> #999999999999999999
> 
> * Start a new bash shell
> 
> * Run the following commands:
> export HISTTIMEFORMAT="[%F %T] "
> history
> 
> When history gets executed bash segfaults.

It segfaults in strftime() in the C library, which must not be prepared to
handle LONG_MAX or LONG_MIN on that system.  I'll take a look and see if
we can trap that overflow, though you'd like to see strftime handle it
better.

Chet

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