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#!/bin/sh
# Execute a command in an environment where some paths are remapped
#
# Copyright (C) 2002, 2013 Free Software Foundation, Inc.
#
# This file is part of the GNU Hurd.
#
# The GNU Hurd is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2, or (at
# your option) any later version.
#
# The GNU Hurd is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
USAGE="Usage: $0 [OPTION...] [FROM1 TO1 [FROM2 TO2 [...]] -- [COMMAND...]"
DOC="Execute COMMAND in an environment where some paths are remapped."
REMAPPED=""
while [ "$#" -gt 0 ]; do
case "$1" in
--help|"-?")
echo "$USAGE"
echo "$DOC"
echo ""
echo " -?, --help Give this help list"
echo " --usage Give a short usage message"
echo " -V, --version Print program version"
exit 0;;
--usage)
echo "Usage: $0 [-V?] [--help] [--usage] [--version]"
exit 0;;
--version|-V)
echo "STANDARD_HURD_VERSION_remap_"; exit 0;;
--)
shift
break;;
-*)
echo 1>&2 "$0: unrecognized option \`$1'"
echo 1>&2 "Try \`$0 --help' or \`$0 --usage' for more information";
exit 1;;
*)
MAPPED="$MAPPED $1"
shift;;
esac
done
if [ $# -eq 0 ]; then
set -- ${SHELL:-/bin/sh}
fi
# We exec settrans, which execs the "fakeauth" command in the chroot context.
# The `pwd` is evaluated here and now, and that result interpreted inside
# the shell running under fakeauth to chdir there inside the chroot world.
# That shell then execs our arguments as a command line.
exec /bin/settrans --chroot \
/bin/sh -c "cd `pwd`; $*" \
-- / /hurd/remap $MAPPED
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