Is mine process still a daemon?

Question

I'm relatively new to programming and my English might be little rusty so please be gentle :).

I'm trying to create a group of daemons that will belong to same group without group leader. I think I did it but I'm not sure if my method still meets the requirements (if my process is still a daemon)

This part is in 0.c

pid_t pid=fork();
if (pid==0)
{
    execl ("./1", "1", str, (char *)0);
    exit(EXIT_SUCCESS);
    sleep(1);
}

This part of code is in 1.c

pid = fork();
if (pid < 0)
    exit(EXIT_FAILURE);
if (pid > 0)
    exit(EXIT_SUCCESS);
gid = setsid();
if (gid < 0)
    exit(EXIT_FAILURE);
gid = setsid();
if (gid < 0)
    exit(EXIT_FAILURE);
for(i=0; i<n; i++)
{
pid_t pid=fork();
    if (pid==0)
    {
        execl ("./2", "2", str, str1, (char *)0);
        exit(EXIT_SUCCESS);
        sleep(1);
    }
}

and this in 2

pid_t pid;
pid = fork();
if (pid < 0)
    exit(EXIT_FAILURE);
if (pid > 0)
    exit(EXIT_SUCCESS);
umask(0);
chdir("./");
close(STDIN_FILENO);
close(STDOUT_FILENO);
close(STDERR_FILENO);

Now let's say I have n processes 2 are they all daemons?

EDIT: I see now that those probably aren't daemons. Can someone explain to me then how to make daemons that will meet my requirements?

Answer 1

Normally daemons need to disassociate from their controlling terminal, or at least ignore SIGHUP , and you don't appear to be doing this.

\n

So no, I do not think your code is achieving daemon status.

After further investigation, I found that setsid() disassociates the controlling terminal, among other actions. So please disregard this.

Answer 2

Anything with the PPID of 1 is, for the most part, likely a daemon. You can check the likelihood that your process is a daemon then by executing: (command line)

$ ps -xj

There is much more here discussing ways to test for daemon.

And here discussing creating a daemon in general. (using C)