[Buildroot] [git commit] Makefile: allow rootfs overlays to override symbolic links
Arnout Vandecappelle (Essensium/Mind)
arnout at mind.be
Wed Feb 6 16:11:02 UTC 2019
commit: https://git.buildroot.net/buildroot/commit/?id=0c96bda11eb26ada660dcd31843fbc9523be6062
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/master
Since commit 0db34529f48 we use rsync with the --keep-dirlinks option to
prevent overlays from accidentally overwriding /{usr,bin,sbin,lib} links
when BR2_ROOTFS_MERGED_USR option is enabled. Unfortunately this also
prevents replacing a symlink by a directory on purpose (e.g. /var/log,
to persist system logs).
Steps to reproduce:
- enable BR2_ROOTFS_MERGED_USR and BR2_PACKAGE_SKELETON_INIT_SYSV
- mkdir some_path/rootfs-overlay/var/log
- enable BR2_ROOTFS_OVERLAY="some_path/rootfs-overlay"
- run 'make'
- 'target/var/log' is still a symlink to '../tmp', not a directory
The --keep-dirlinks option can be dropped, since we run sanity checks
on overlays. Now the rsync invocation is identical to the SYSTEM_RSYNC
logic we have in system/system.mk, so use that variable.
Signed-off-by: Carlos Santos <casantos at datacom.ind.br>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout at mind.be>
---
Makefile | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/Makefile b/Makefile
index 752a850753..0d2659c46e 100644
--- a/Makefile
+++ b/Makefile
@@ -800,9 +800,7 @@ endif # merged /usr
@$(foreach d, $(call qstrip,$(BR2_ROOTFS_OVERLAY)), \
$(call MESSAGE,"Copying overlay $(d)"); \
- rsync -a --ignore-times --keep-dirlinks $(RSYNC_VCS_EXCLUSIONS) \
- --chmod=u=rwX,go=rX --exclude .empty --exclude '*~' \
- $(d)/ $(TARGET_DIR)$(sep))
+ $(call SYSTEM_RSYNC,$(d),$(TARGET_DIR))$(sep))
@$(foreach s, $(call qstrip,$(BR2_ROOTFS_POST_BUILD_SCRIPT)), \
$(call MESSAGE,"Executing post-build script $(s)"); \
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