diff options
Diffstat (limited to 'meta/recipes-core/volatile-binds/files/mount-copybind')
| -rwxr-xr-x | meta/recipes-core/volatile-binds/files/mount-copybind | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/meta/recipes-core/volatile-binds/files/mount-copybind b/meta/recipes-core/volatile-binds/files/mount-copybind new file mode 100755 index 0000000000..2aeaf84ddb --- /dev/null +++ b/meta/recipes-core/volatile-binds/files/mount-copybind @@ -0,0 +1,34 @@ +#!/bin/sh +# +# Perform a bind mount, copying existing files as we do so to ensure the +# overlaid path has the necessary content. + +if [ $# -lt 2 ]; then + echo >&2 "Usage: $0 spec mountpoint [OPTIONS]" + exit 1 +fi + +spec=$1 +mountpoint=$2 + +if [ $# -gt 2 ]; then + options=$3 +else + options= +fi + +[ -n "$options" ] && options=",$options" + +mkdir -p "${spec%/*}" +if [ -d "$mountpoint" ]; then + if [ ! -d "$spec" ]; then + mkdir "$spec" + cp -pPR "$mountpoint"/. "$spec/" + fi +elif [ -f "$mountpoint" ]; then + if [ ! -f "$spec" ]; then + cp -pP "$mountpoint" "$spec" + fi +fi + +mount -o "bind$options" "$spec" "$mountpoint" |