vp-build/common/chroot-style/uunshare.sh

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#!/bin/sh
#
# This chroot script uses xbps-uunshare(8) with user_namespaces(7).
#
readonly MASTERDIR="$1"
readonly DISTDIR="$2"
readonly HOSTDIR="$3"
readonly EXTRA_ARGS="$4"
shift 4
if ! command -v xbps-uunshare >/dev/null 2>&1; then
exit 1
fi
if [ -z "$MASTERDIR" -o -z "$DISTDIR" ]; then
echo "$0 MASTERDIR/DISTDIR not set"
exit 1
fi
exec xbps-uunshare $EXTRA_ARGS -D $DISTDIR ${HOSTDIR:+-H $HOSTDIR} $MASTERDIR $@