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When using a RO root with systemd, it is intended that /var/lib should be populated at boot time by tmpfiles system mirroring it from /usr/share/factory/var/lib. However, this will only happen if /var/lib does not already exist at the time systemd-tmpfiles runs. If it does exist, then tmpfiles will (silently) skip it and do nothing. It turns out /var/lib will exist, because some part of systemd creates /var/lib/systemd/catalog on boot before tmpfiles runs. The fix used here is to also create tmpfiles entries for the contents of /var/lib/* and /var/lib/systemd/*. This way, when those directories already exist, the entire tree is not skipped and instead the not-yet-existing contents of /var/lib and /var/lib/systemd will be still be mirrored from the factory dir. And if /var/lib/systemd, or a prefix of that, stops getting created and does not exist, it'll still mirror properly. It does cause some warnings from systemd: systemd[1]: Starting Create Volatile Files and Directories... systemd-tmpfiles[148]: [/etc/tmpfiles.d/var-factory.conf:7] Duplicate line for path "/var/lib/systemd", ignoring. systemd-tmpfiles[148]: [/etc/tmpfiles.d/var-factory.conf:8] Duplicate line for path "/var/lib/systemd/coredump", ignoring. But they can be ignored. IMHO, I think a better solution would be for systemd-tmpfiles to gain a "merge tree" operation that is like "C" but doesn't abort if the destination exists, but rather merges the source into it. Signed-off-by: Trent Piepho <tpiepho@impinj.com> [yann.morin.1998@free.fr: slight rework of commit title] Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr> Tested-by: Adam Duskett <aduskett@gmail.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com> |
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| arch | ||
| board | ||
| boot | ||
| configs | ||
| docs | ||
| fs | ||
| linux | ||
| package | ||
| support | ||
| system | ||
| toolchain | ||
| utils | ||
| .defconfig | ||
| .flake8 | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| .gitlab-ci.yml.in | ||
| CHANGES | ||
| Config.in | ||
| Config.in.legacy | ||
| COPYING | ||
| DEVELOPERS | ||
| Makefile | ||
| Makefile.legacy | ||
| README | ||
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