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When we generate the taballs off a local working copy of a VCS tree,
the umask is the one that we enforce in out top-level Makefile.
However, it is possible that a user manually tinkers in said working
copy (e.g. to check an upstream bug fix, or regression). If the user
umask is different from the one Buildroot enfirces, such tinkering
can impact the mode bits of the files, even if their content is not
modified.
When we eventually need to create a tarball from said working copy,
the VCS (e.g. git) will only be interested in checking whether the
content of the files have changed before chcking them out, and will
not look at, and restore/fix the mode bits.
As a consequence, we may create non-reproducible archives.
We fix that by enforcing the mode bits on the files before we create
the tarball: we disable the write and execute bits, and only set the
execute bit if the user execute bit is set.
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Vincent Fazio <vfazio@xes-inc.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 768f9f80f6)
Signed-off-by: Peter Korsgaard <peter@korsgaard.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 OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches