Re: Print plot error

[Ben Abbott]

On Tuesday, August 25, 2009, at 12:05PM, "Dmitri A. Sergatskov" 
<address@hidden> wrote:
>On Tue, Aug 25, 2009 at 10:49 AM, Ben Abbott<address@hidden> wrote:
>> On Monday, August 24, 2009, at 09:32PM, "Ben Abbott" <address@hidden> wrote:
>>>
>>>On Aug 24, 2009, at 9:26 PM, Rob Mahurin wrote:
>>>
>>>> On Aug 24, 2009, at 9:14 PM, Ben Abbott wrote:
>>>>> Sorry for my lack ... but will waitpid kill non-zombie children?
>>>>>
>>>>> There is an active gnuplot for each figure window. Would wiatid
>>>>> terminate those children as well?
>>>>
>>>> No, see the man page for the wait4() and waitpid() system calls.
>>>>
>>>> waitpid(-1,0) will hang if there are children still running, but
>>>> waitpid(-1,WNOHANG) will just return zero.
>>>>
>>>> If there are not children running, waitpid(-1,anything) should just
>>>> return -1.
>>>>
>>>> Don't believe me, test it.
>>>>
>>>> Rob
>>>
>>>Sorry, I don't mean to question you, only trying to learn about
>>>something I have no prior experience with.
>>>
>>>If neither of you get to it, I'll try to put together a quck changeset
>>>tomorrow (attributed to you and Dmitri).
>>>
>>>Ben
>>
>> New problem. I'm presently unable to build the developers sources, and am 
>> running 3.2.2 instead.
>>
>> octave:9> waitpid (-1,"WNOHANG")
>
>There should be no quotes. WNOHANG is a function:
>
>octave:1> WNOHANG
>ans =  1
>octave:2> help WNOHANG
>`WNOHANG' is a built-in function
>
> -- Built-in Function:  WNOHANG ()
>     Return the numerical value of the option argument that may be
>     passed to `waitpid' to indicate that it should return its status
>     immediately instead of waiting for a process to exit.
>
>     See also: waitpid, WUNTRACED, WCONTINUE
>
>Dmitri.

Dmitri, Rob,

Thanks for the correction.

Please try the attached changeset.

Ben

changeset.patch
Description: Binary data