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authorDavid Oberhollenzer <david.oberhollenzer@tele2.at>2018-11-05 15:28:18 +0100
committerDavid Oberhollenzer <david.oberhollenzer@tele2.at>2018-11-05 16:11:47 +0100
commit021fa432447bd7b447ca39738040698db39d751b (patch)
tree66c0e46dfd952ce6de6043916f3eb9e2d92e62e2 /scripts/overlay.sh
Initial commitv1
Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>
Diffstat (limited to 'scripts/overlay.sh')
-rwxr-xr-xscripts/overlay.sh21
1 files changed, 21 insertions, 0 deletions
diff --git a/scripts/overlay.sh b/scripts/overlay.sh
new file mode 100755
index 0000000..090671c
--- /dev/null
+++ b/scripts/overlay.sh
@@ -0,0 +1,21 @@
+#!/bin/sh
+
+lower=/cfg/preserve/${1}
+upper=/cfg/overlay/${1}
+work=/cfg/overlay/${1}_work
+target=${2}
+
+if [ ! -d "$target" ]; then
+ exit
+fi
+
+if [ -d "$lower" ]; then
+ if [ -d "$upper" ]; then
+ mkdir -p "$work"
+ mount -t overlay overlay \
+ -olowerdir=${lower},upperdir=${upper},workdir=${work} \
+ ${target}
+ else
+ mount --bind "$lower" "$target"
+ fi
+fi