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@xxxxxxxxx wrote:
Steve wrote:
[mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of m.roth@xxxxxxxxx
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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