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Ulrich Ölmann 5f78d78beb volatile-binds: mount-copybind: fix typo

Amend a small typing error.

(From OE-Core rev: 6d3c24cfc269fbcd49acd8be220395500fc7120c)

Signed-off-by: Ulrich Ölmann <u.oelmann@pengutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2024-10-11 12:17:03 +01:00

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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 the target is a directory and overlayfs is available (and the environment

variable MOUNT_COPYBIND_AVOID_OVERLAYFS=1 is not set), then an overlay mount

will be attempted first.

if [ $# -lt 2 ]; then echo >&2 "Usage: $0 spec mountpoint [OPTIONS]" exit 1 fi

e.g. /var/volatile/lib

spec=$1

e.g. /var/lib

mountpoint=$2

if [ $# -gt 2 ]; then options=$3 else options= fi

[ -n "$options" ] && options=",$options"

mkdir -p "${spec%/*}"

if [ -d "$mountpoint" ]; then

if [ -d "$spec" ]; then
    specdir_existed=yes
else
    specdir_existed=no
    mkdir "$spec"
    # If the $spec directory is created we need to take care that
    # the selinux context is correct
    if command -v selinuxenabled > /dev/null 2>&1; then
        if selinuxenabled; then
            restorecon "$spec"
        fi
    fi
fi

# Fast version of calculating `dirname ${spec}`/.`basename ${spec}`-work
overlay_workdir="${spec%/*}/.${spec##*/}-work"
if [ "$MOUNT_COPYBIND_AVOID_OVERLAYFS" != 1 ]; then
    mkdir "${overlay_workdir}"
fi

# Try to mount using overlay, which is much faster than copying files.
# If that fails, fall back to slower copy.
if command -v selinuxenabled > /dev/null 2>&1; then
    if selinuxenabled; then
        mountcontext=",rootcontext=$(matchpathcon -n "$mountpoint")"
    fi
fi
if [ "$MOUNT_COPYBIND_AVOID_OVERLAYFS" = 1 ] || ! mount -t overlay overlay -olowerdir="$mountpoint",upperdir="$spec",workdir="$overlay_workdir""$mountcontext" "$mountpoint" > /dev/null 2>&1; then
    rm -rf "$overlay_workdir"

    if [ "$specdir_existed" != "yes" ]; then
        cp -aPR "$mountpoint"/. "$spec/"
    fi

    mount -o "bind$options" "$spec" "$mountpoint"
    # restore the selinux context.
    if command -v selinuxenabled > /dev/null 2>&1; then
        if selinuxenabled; then
            restorecon -R "$mountpoint"
        fi
    fi
fi

elif [ -f "$mountpoint" ]; then if [ ! -f "$spec" ]; then cp -aP "$mountpoint" "$spec" fi

mount -o "bind$options" "$spec" "$mountpoint"
# restore the selinux context.
if command -v selinuxenabled > /dev/null 2>&1; then
    if selinuxenabled; then
        restorecon -R "$mountpoint"
    fi
fi

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