Toggle the PR_GET_DUMPABLE flag

toggle-dumpable.c

#include <stdio.h>
#include <sys/prctl.h>

int main(int argc, char **argv) {
    int dumpable;

    while(1) {
        dumpable = prctl(PR_GET_DUMPABLE);
        printf("The process currently %s dumpable. Press any key to %s dumping.", dumpable ? "is" : "isn't", dumpable ? "disable" : "enable");
        getchar();
        prctl(PR_SET_DUMPABLE, dumpable ? 0 : 1);
    }

    return 0;
}