From: Chen Qi <[email protected]> Packages in our system may need to write to some directories to function correctly. In read-only rootfs, these directories should be made writable.
This patch uses a convenient and uniform way to handle such situations. The read-only-rootfs-hook.sh script searches the /etc/default/readonly diretory for config files and then apply them one by one. The config files simply have the following format. <original diretory> <corresponding directory in volatile story> For example, /etc/default/readonly/initscripts have the following content. /var/lib /var/volatile/lib This patch only has effect for systems with read-only rootfs. [YOCTO #4103] [YOCTO #4888] Signed-off-by: Chen Qi <[email protected]> --- .../initscripts-1.0/read-only-rootfs-hook.sh | 17 ++++++++++++++--- meta/recipes-core/initscripts/initscripts_1.0.bb | 5 +++++ 2 files changed, 19 insertions(+), 3 deletions(-) diff --git a/meta/recipes-core/initscripts/initscripts-1.0/read-only-rootfs-hook.sh b/meta/recipes-core/initscripts/initscripts-1.0/read-only-rootfs-hook.sh index d523924..b61f420 100644 --- a/meta/recipes-core/initscripts/initscripts-1.0/read-only-rootfs-hook.sh +++ b/meta/recipes-core/initscripts/initscripts-1.0/read-only-rootfs-hook.sh @@ -1,15 +1,26 @@ #!/bin/sh . /etc/init.d/functions +READONLY_CFGDIR="/etc/default/readonly" ROOTFS_READ_ONLY=`is_rootfs_readonly` [ "$ROOTFS_READ_ONLY" = "no" ] && exit 0 +apply_conf () { + cfgfile=$1 + cat $cfgfile | while read line; do + eval `echo "$line" | sed -n "s/\(.*\)\ \(.*\)/DIR_READONLY=\1; DIR_VOLATILE=\2;/p"` + mkdir -p $DIR_VOLATILE + cp -a $DIR_READONLY/* $DIR_VOLATILE + mount --bind $DIR_VOLATILE $DIR_READONLY + done +} + if [ "$1" = "start" ] ; then grep -q "tmpfs /var/volatile" /proc/mounts || mount /var/volatile - mkdir -p /var/volatile/lib - cp -a /var/lib/* /var/volatile/lib - mount --bind /var/volatile/lib /var/lib + for file in `ls -1 "$READONLY_CFGDIR"`; do + apply_conf "$READONLY_CFGDIR/$file" + done fi diff --git a/meta/recipes-core/initscripts/initscripts_1.0.bb b/meta/recipes-core/initscripts/initscripts_1.0.bb index 52e1c9c..46c4c99 100644 --- a/meta/recipes-core/initscripts/initscripts_1.0.bb +++ b/meta/recipes-core/initscripts/initscripts_1.0.bb @@ -105,6 +105,11 @@ do_install () { install -m 0755 ${WORKDIR}/umountfs ${D}${sysconfdir}/init.d/umountfs install -m 0755 ${WORKDIR}/device_table.txt ${D}${sysconfdir}/device_table # +# Create config files for read-only rootfs +# + install -d ${D}${sysconfdir}/default/readonly + echo "/var/lib /var/volatile/lib" > ${D}${sysconfdir}/default/readonly/initscripts +# # Create runlevel links # update-rc.d -r ${D} rmnologin.sh start 99 2 3 4 5 . -- 1.7.9.5 _______________________________________________ Openembedded-core mailing list [email protected] http://lists.openembedded.org/mailman/listinfo/openembedded-core
