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Root makefile imposes 'umask 0022', and this may be more restrictive than the user's original umask - which could have provisions set to share files/dirs with other users. As an example, the imposed value makes the per-package download directories not writeable for the group, but just for the owner - the user that issued the first build that populated the per-package dl dir for the first time (say user A). Thus, if a BR package changes its version (e.g. for buildroot update), and another user (say user B, in the same group of A) starts a build, BR fails the creation of package-xxx.tar.gz inside the dl dir, because user B has no write permissions on that path. Furthermore, in the case of the git backend, this makes the git cache not updatable by a different user. This is disruptive for a host used by many users, all belonging to a certain group. So, to allow sharing of a rw BR2_DL_DIR location among users, we save the original umask value and restore it during the download process. Signed-off-by: Luca Pesce <luca.pesce@vimar.com> [Arnout: - CURR_UMASK -> CUR_UMASK. - BR2_ORIG_UMASK -> BR_ORIG_UMASK. - Don't check if the umask is more permissive, apply it regardless. If the user explicitly doesn't want to make their DL_DIR readable by others, that's fine. - Don't export BR_ORIG_UMASK. - Only set BR_ORIG_UMASK if it we recurse, and only set umask if BR_ORIG_UMASK is set. - Add DOWNLOAD_SET_UMASK to simplify the latter. ] Signed-off-by: Arnout Vandecappelle <arnout@mind.be>
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 OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches