A simple ptrace-trick example

ptrace_trick_1.c

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

int main() {
    if (ptrace(PTRACE_TRACEME, 0, 1, 0) == -1) {
        printf("Debugger\n");
    } else {
        printf("Normal\n");
    }
    return 0;
}