Am I traced?

[Kamil Rytarowski <n54%gmx.com@localhost>]

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I'm trying to write a check whether I am a traced process.

Is the following code correct:

#define _KMEMUSER
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <stdio.h>
#include <unistd.h>
#include <kvm.h>
#include <err.h>
#include <stdlib.h>

int main(int argc, char **argv)
{
    int traced = -1;
    kvm_t *kd;
    int cnt;

    struct kinfo_proc *info;
    size_t size = sizeof(info);

    kd = kvm_open(NULL, NULL, NULL, KVM_NO_FILES, "kvm_open");
    if (kd == NULL)
        err(EXIT_FAILURE, "kvm_open");

    info = kvm_getprocs(kd, KERN_PROC_PID, getpid(), &cnt);
    if (info == NULL)
        err(EXIT_FAILURE, "kvm_getprocs");

    traced = info->kp_proc.p_flag & P_TRACED;

    kvm_close(kd);

    printf("traced=%d\n", traced);

    return 0;
}

I'm getting weird results for info->kp_proc.p_flag indicating that I
was timeouted during sleep.
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