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As recently discussed on lwn.net: https://lwn.net/Articles/695478/ The kernel has special behaviour for uid/gid 65534: 1. The kernel maps UIDs > 65535 to it when some subsystem/API/fs only supports 16bit UIDs, but a 32bit UID is passed to it. 2. it's used by the kernel's user namespacing as the internal UID that external UIDs are mapped to that don't have any local mapping. 3. It's used by NFS for all user IDs that cannot be mapped locally if UID mapping is enabled. Most distributions already map (or are in the progress of changing) nobody/nogroup to the 65534 uid/gid, so lets do so as well. Signed-off-by: Peter Korsgaard <peter@korsgaard.com> Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on Freenode IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches