On 3 Apr 2012, at 22:06, Shantonu Sen wrote:

you should look at the source code to top

<http://www.opensource.apple.com/source/top/top-73/libtop.c>

Thank you very much. This was a very valuable link. The answer to my problem is the (as far as I can see) undocumented string: "sysctl.proc_cputype" which induces sysctl() to return the cpu-type (CPU_TYPE_X86 or CPU_TYPE_X86_64) of a supplied pid.

On Apr 3, 2012, at 3:55 AM, "Gerriet M. Denkmann" <gerriet@mdenkmann.de> wrote:

...

Given a normal app (NOT a kext) (which might run as root if necessary) and the pid of another process, how to I get the information Activity Monitor displays under "Kind", i.e. Intel, Intel 64, PowerPC etc. ?

I looked at sysctl ( CTL_KERN, KERN_PROC, KERN_PROC_PID, pid ) but did not see anything useful.

There is proc_is64bit(), but it seems this is not for normal apps.

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