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bind-mount for plain access directories specified in kernel cmdline #1

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14 changes: 14 additions & 0 deletions initramfs-tools/scripts/local-bottom/fsprotect
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Original file line number Diff line number Diff line change
Expand Up @@ -90,8 +90,12 @@ fi

# Determine tmpfs size or fallback to 512MB
SZ=512M
fsprotect_skip=
for x in `cat /proc/cmdline` ; do
case "$x" in
fsprotect_skip=*)
fsprotect_skip="${x#fsprotect_skip=}"
;;
fsprotect=*)
# According to bug #564141 this is supported
# by dash (tested - works)
Expand Down Expand Up @@ -139,6 +143,16 @@ run_echo "mkdir ${rootmnt}$BASE/tmp"
run_echo "mount -n -o move $BASE/system ${rootmnt}$BASE/system" # Move those dirs inside the new root
run_echo "mount -n -o move $BASE/tmp ${rootmnt}$BASE/tmp"

if ! [ -z "${fsprotect_skip}" ]; then
run_echo "mount -n -o remount,rw ${rootmnt}$BASE/system"
OLDIFS="$IFS"
IFS=,
for x in $fsprotect_skip; do
_log_msg "Excluding ${x} from aufs"
IFS="$OLDIFS" run_echo "mount -n -o bind ${rootmnt}$BASE/system${x} ${rootmnt}${x}"
done
fi

# This one will prevent FSCKs
touch ${rootmnt}/fastboot

Expand Down