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Re: PROMPT_COMMAND='history -a; history -n' causes shell hang in OX 10.1


From: Piotr Grzybowski
Subject: Re: PROMPT_COMMAND='history -a; history -n' causes shell hang in OX 10.10 Yosemite / bash 3.2.53
Date: Fri, 7 Nov 2014 17:35:28 +0100

 Good point Graham, definitely good place to start.
 If you are interested we can discuss further, privately. Mainly
because I want to say some nasty things about implementing sharing and
locking resources withouth ipc. :))

cheers,
pg



On Fri, Nov 7, 2014 at 1:38 PM, Graham Jones
<address@hidden> wrote:
> Guys thanks so much for taking this discussion further than just the reported 
> bug that prevented the existing workaround.
> I’ve often considered putting this work in myself but wasn’t sure what the 
> reason was for this not being in bash already and if there was an 
> architectural difficulty with implementing it. It sounds more like that it 
> just wasn’t considered as an option rather than there is a problem 
> implementing it.
>
> Given that ksh only ever worked this way (but its shared history performed 
> flawlessly)l, I would think that the mechanism they used and particularly how 
> they handled the locking is a good place to start with.
>
> GJ
>
>> On 7 Nov 2014, at 11:29 pm, Piotr Grzybowski <address@hidden> wrote:
>>
>> On Fri, Nov 7, 2014 at 1:26 PM, Eric Blake <address@hidden> wrote:
>>>
>>> Named pipes (aka fifos) are notorious for being buggy on Cygwin and
>>> non-available on mingw.
>>
>> thanks Eric. good news.
>> so this means, that shared history can only be implemented using
>> regular files. is that right?
>>
>> cheers,
>> pg
>



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