If /var/volatile is a mount point it shouldn't contain any files before mount time. If files are there, they will no longer be able to be accessed once the tmpfs gets mounted at /var/volatile.
This problem can be seen for instance when systemd creates /var/volatile/log/journal as part of its package installation. It then assumes the journal is persistent even though /var/volatile/log/journal goes away shortly thereafter. This change makes sure that there are no files in /var/volatile if it is to be used as a mount point. [Yocto #7388] Signed-off-by: Randy Witt <randy.e.w...@linux.intel.com> --- meta/classes/image.bbclass | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/meta/classes/image.bbclass b/meta/classes/image.bbclass index 89eb5f3..dfedf9d 100644 --- a/meta/classes/image.bbclass +++ b/meta/classes/image.bbclass @@ -181,6 +181,8 @@ POSTINST_LOGFILE ?= "${localstatedir}/log/postinstall.log" SYSTEMD_DEFAULT_TARGET ?= '${@bb.utils.contains("IMAGE_FEATURES", "x11-base", "graphical.target", "multi-user.target", d)}' ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains("DISTRO_FEATURES", "systemd", "set_systemd_default_target; ", "", d)}' +ROOTFS_POSTPROCESS_COMMAND += 'empty_var_volatile;' + # some default locales IMAGE_LINGUAS ?= "de-de fr-fr en-gb" @@ -377,6 +379,20 @@ set_systemd_default_target () { fi } +# If /var/volatile is not empty, we have seen problems where programs such as the +# journal make assumptions based on the contents of /var/volatile. The journal +# would then write to /var/volatile before it was mounted, thus hiding the +# items previously written. +# +# This change is to attempt to fix those types of issues in a way that doesn't +# affect users that may not be using /var/volatile. +empty_var_volatile () { + match=`awk '$1 !~ "#" && $2 ~ /\/var\/volatile/{print $2}' ${IMAGE_ROOTFS}/etc/fstab 2> /dev/null` + if [ -n "$match" ]; then + find ${IMAGE_ROOTFS}/var/volatile -mindepth 1 -delete + fi +} + # Turn any symbolic /sbin/init link into a file remove_init_link () { if [ -h ${IMAGE_ROOTFS}/sbin/init ]; then -- 1.9.3 -- _______________________________________________ Openembedded-core mailing list Openembedded-core@lists.openembedded.org http://lists.openembedded.org/mailman/listinfo/openembedded-core