Re: how to tell if a process is 64-bit

[Thomas Klausner <tk%giga.or.at@localhost>]

On Sat, Sep 09, 2017 at 05:58:53AM +1000, Matthew Green wrote:
> > In a cross-platform process utility tool the question came up how to
> > decide if a process is 64-bit.
> > 
> > https://github.com/giampaolo/psutil/issues/1102
> > 
> > What's the best answer for NetBSD?
> 
> in C:
> 
> internally, just check #ifdef _LP64.
> externally, kvm_getprocs() with KERN_PROC_PID.
> 
> in other languages?  don't ask me.

I'm asking for a python frontend to the C one.

I came up with this fragment:

#include <kvm.h>
#include <stdlib.h>
#include <sys/sysctl.h>

int main(int argc, char *argv[]) {
	int pid, res;
	struct kinfo_proc2 *kp;
	kvm_t *kvmp = kvm_open(NULL, NULL, NULL, KVM_NO_FILES, NULL);
	if (kvmp == NULL)
		exit(1);
	pid = atoi(argv[1]);
	kp = kvm_getproc2(kvmp, KERN_PROC_PID, pid, sizeof(*kp), &res);
	if (res != 1)
		exit(1);
	kvm_close(kvmp);
}


Which part of the structure can I check to find out 32-bitness?

Thanks,
 Thomas