Classification: UNCLASSIFIED
Caveats: NONE
Thank Tim,
I'll remember this should I need to access other commands from
c++. I can definitely see where this would come in useful. For now,
simply reading the stat file does what I need.
Steve
-----Original Message-----
From: redhat-list-bounces@redhat.com
[mailto:redhat-list-bounces@redhat.com] On Behalf Of Tim P. Starrin
Sent: Wednesday, April 14, 2010 11:29 AM
To: General Red Hat Linux discussion list
Subject: Re: vsize from within C++ (UNCLASSIFIED)
You could always use "popen(3)" to run the command from a C program,
then read the output of the command.
Tim
m.roth@5-cent.us wrote:
> Steve wrote:
>
>> [mailto:redhat-list-bounces@redhat.com] On Behalf Of m.roth@5-cent.us
>> Sent: Wednesday, April 14, 2010 8:17 AM
>>
>>> Steve wrote:
>>>
>>>
>>>> Is it possible for a process to obtain information about itself
>>>> (such as that provided by "top"), specifically vsize?
>>>>
>>> Sure. I never needed it, but a brief google for vsize linux c
>>> programming gets
>>>
>>> <http://stackoverflow.com/questions/669438/how-to-get-memory-usage-a
>>> t-run-time-in-c>
>>>
>
>
>> Thanks Mark! I was working with /proc/self/stat and getting to the
>> vSize value using system() and an awk command, but was having trouble
>> getting the value back into a variable in my program...always getting
>> 0 which was the value passed back from system() ... 0 = success.
>>
>
> Right - system, either in awk or perl, only returns the status of the
> command, and I'm not aware of any way to actually get info from it,
> other than the *really* ugly way of <awkcmd> > /tmp/awkcmd.output;
> open/read /tmp/awkcmd.output.
>
>> I'll give this a try. My Google searches didn't come up with
>> anything this good.
>>
>
> You're welcome, Searches are their own art form - that's why I gave
> the terms I used for the search, so as to give you *how* I found this.
> I usually work my way down the tree: linux (top) vmsize (what I want
> to
> find) c programming (what form I need the answer in).
>
> mark
>
>
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vsize from within C++ (UNCLASSIFIED)
