fork() test for Linux API

<Abstract: Now to the implementation stage of docker, the underlying namespace and cgroup should be deeply understood. The API it calls is also slowly familiar. #include #include int main() { pid_t fpid; //int count = 0; fp...

Now at the implementation stage of docker,

the underlying namespace and cgroup should be deeply understood.

The API it calls is also slowly familiar.

#include <unistd.h>
#include <stdio.h>

int main() {
    pid_t fpid;
    //int count = 0;
    fpid = fork();
   
    if (fpid < 0) printf("error in fork!") ;
    else if (fpid == 0) {
        printf("I am child. Process id is %d\n", getpid());
    }
    else {
        printf("I am parent. Process id is %d\n", getpid());
    }

    return 0;
}




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