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- #!/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"
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