> Consider that i have a readonly filesystem mounted at / and that the > /etc folder consists of some files. Is is possible to mount a ramfs > filesystem at /etc such that the existing files in the /etc partition > are still accessible and any new files written to the /etc partition > are saved in the ramfs (which will be lost upon reboot).
It *might* be possible with some funky Linux mount option I can't remember. But you don't actually *need* that, since what you want can be achieved in a portable way with just a tiny bit of scripting. * Have /img/etc (or whatever directory you want in your root filesystem) contain your original /etc files. * Have your original /etc be a set of symlinks to /img/etc. For instance, /etc/fstab is a symlink to /img/etc/fstab. * When you create your tmpfs, also copy all of /img/etc to your new tmpfs. mount -t tmpfs -o mode=0755 tmpfs /etc cp -a /img/etc/* /etc/ Of course, that operation must be done atomically, i.e. no other process should be running when you're performing the mount+cp. * That's it. You'll probably want a writable filesystem for more than /etc though, so if you want to avoid multiplicating tmpfs mounts, adjust and adapt so that your new /etc is a subdirectory of your tmpfs. -- Laurent _______________________________________________ busybox mailing list [email protected] http://lists.busybox.net/mailman/listinfo/busybox
