vsize from within C++ (UNCLASSIFIED)

Burke, Thomas G. tg.burke at ngc.com
Wed Apr 14 16:53:21 UTC 2010


Sounds "awk"ward...

Sorry, just couldn't resist.

''

-----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 12:29 PM
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-at-ru
n-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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