Messages in this thread | | | Date | Tue, 22 Sep 2009 14:53:53 -0500 | From | Tim Walberg <> | Subject | Re: (un)mount ramfs from C code |
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mount(2) (i.e. the system-call/library function) does not update /etc/mtab, IIRC... mount(8) (the command-line utility) does...
In either case, I would expect the mount to show up in /proc/mounts (assuming /proc is mounted).
On 09/22/2009 12:30 -0700, Brian McGrew wrote: >> > 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 >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> Please read the FAQ at http://www.tux.org/lkml/ End of included message
-- twalberg@comcast.net
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