vsize from within C++ (UNCLASSIFIED)
Tim P. Starrin
Timothy.P.Starrin at nasa.gov
Wed Apr 14 16:29:27 UTC 2010
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-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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