Test the nsfork() function.

test_nsfork.c

/* must run as root or with CAP_SYS_ADMIN
 * e.g. sudo ./test_nsfork
 * or
 * sudo 
 */


#include "nsfork.h"
#include <stdio.h>

int main(int argc, char *argv[]) {
    pid_t child;
    child = nsfork(0);

    // parent process
    if (child > 0)
        printf("one: %d\n", getpid());

    // child process
    else if (child == 0)
        printf("two: %d\n", getpid());

    // error - probably missing capabilities
    else
        printf("error in nsfork(): probably lacking privileges or running on an old kernel\n");

    /* printf("Child value is %d in process %d\n", child, getpid()); */

    return 0;
}