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We use makedevs to create device nodes in the target rootfs. However, this can be called several times, e.g. when building several filesystem images or when rebuilding. When makedevs is called the second time, the device node already exists so mknod() errors out. This wasn't noticed before because fakeroot's mknod() wrapper (incorrectly) does _not_ error out when the file exists already. Now we switched from fakeroot to pseudo, the problem becomes apparent. Before creating the device node, check if it already exists and if so, if it has the correct device type and number. Change of mode and ownership is still done. This approach was preferred over removing the target files before creating them, which would be simpler. However, when e.g. a file exists as a normal file and makedevs specifies it as a device node, that really is an error so we should detect it. The other types don't have to be changed. The 'd' (directory) type is already OK because it already only creates directories if they don't exist yet. The 'f' (file mode) and 'r' (recursive) types only operate on files and directories that exist already. Patch also sent upstream to busybox. Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> Reported-by: Fabio Estevam <festevam@gmail.com> Tested-by: Fabio Estevam <festevam@gmail.com> Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Tested-by: "Yann E. MORIN" <yann.morin.1998@free.fr> 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