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author | Patrick Williams <patrick@stwcx.xyz> | 2015-09-15 22:41:29 +0300 |
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committer | Patrick Williams <patrick@stwcx.xyz> | 2015-09-15 22:41:29 +0300 |
commit | 21f9b84b4b729fbd7acbd465e7a3f726e4d20f91 (patch) | |
tree | eb2d091d427ca0813b445509d59cc8e27e8ad25f /yocto-poky/meta/recipes-core/initscripts/initscripts-1.0/read-only-rootfs-hook.sh | |
parent | 101cef31e2bf54c678501155cd2106251acbd076 (diff) | |
parent | c124f4f2e04dca16a428a76c89677328bc7bf908 (diff) | |
download | openbmc-21f9b84b4b729fbd7acbd465e7a3f726e4d20f91.tar.xz |
Merge commit 'c124f4f2e04dca16a428a76c89677328bc7bf908' as 'yocto-poky'
Diffstat (limited to 'yocto-poky/meta/recipes-core/initscripts/initscripts-1.0/read-only-rootfs-hook.sh')
-rw-r--r-- | yocto-poky/meta/recipes-core/initscripts/initscripts-1.0/read-only-rootfs-hook.sh | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/yocto-poky/meta/recipes-core/initscripts/initscripts-1.0/read-only-rootfs-hook.sh b/yocto-poky/meta/recipes-core/initscripts/initscripts-1.0/read-only-rootfs-hook.sh new file mode 100644 index 000000000..1a0328d63 --- /dev/null +++ b/yocto-poky/meta/recipes-core/initscripts/initscripts-1.0/read-only-rootfs-hook.sh @@ -0,0 +1,38 @@ +#!/bin/sh + +. /etc/default/rcS + +[ "$ROOTFS_READ_ONLY" = "no" ] && exit 0 + +is_on_read_only_partition () { + DIRECTORY=$1 + dir=`readlink -f $DIRECTORY` + while true; do + if [ ! -d "$dir" ]; then + echo "ERROR: $dir is not a directory" + exit 1 + else + for flag in `awk -v dir=$dir '{ if ($2 == dir) { print "FOUND"; split($4,FLAGS,",") } }; \ + END { for (f in FLAGS) print FLAGS[f] }' < /proc/mounts`; do + [ "$flag" = "FOUND" ] && partition="read-write" + [ "$flag" = "ro" ] && { partition="read-only"; break; } + done + if [ "$dir" = "/" -o -n "$partition" ]; then + break + else + dir=`dirname $dir` + fi + fi + done + [ "$partition" = "read-only" ] && echo "yes" || echo "no" +} + +if [ "$1" = "start" ] ; then + if [ `is_on_read_only_partition /var/lib` = "yes" ]; 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 + fi +fi + |