vsize from within C++ (UNCLASSIFIED)

[Glasgow, Steven Mr CIV USA TRADOC]

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 at redhat.com
[mailto:redhat-list-bounces at 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 at 5-cent.us wrote:
> Steve wrote:
>   
>> [mailto:redhat-list-bounces at redhat.com] On Behalf Of m.roth at 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
>
>   
--
redhat-list mailing list
unsubscribe mailto:redhat-list-request at redhat.com?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/redhat-list
Classification: UNCLASSIFIED
Caveats: NONE