Re: (un)mount ramfs from C code

[Brian McGrew <brian@visionpro.com>]

> You mean without using system(3), right? System call is how your program
> interacts with the outside world.
> 
> The relevant system calls are:
>   - mount(2): mount("none", "/mnt", "ramfs", 0, NULL);
>   - umount(2): umount("/mnt");
> 

Thanks for the help!  I'm getting there.  Considering the following:

If (mount("ramfs", rd_path, "ramfs", MS_NOEXEC | MS_NOSUID, "size=2000m") <
0) {
    strerror(errno);
} else {
    std::cout << "mounted";
}

Works great!  Thank you.  However, even though the filesystem is mounted and
/bin/mountpoint confirms it's a mountpoint, I do not see the mountpoint
listed in /etc/mtab.

Also, according to what I've read about ramfs, the size is supposed to be
limited to size=, however, I can cat /dev/zero until the box it out of
memory (and swap).

I think I'm just missing something and google's not helping a whole lot
since ramfs isn't the most popular subject today.

Thanks,

-b