void-packages/xbps-src/libexec/xbps-src-chroot-helper.sh.in
Juan RP e3dc3e3066 Added native utilities to mount/umount/chroot via capabilities(7).
Three new helpers will now be installed into ${libexecdir}:
 - xbps-src-capchroot needs to have set CAP_SYS_CHROOT ep.
 - xbps-src-chroot-cap{,u}mount: needs to have set CAP_SYS_ADMIN ep.

That means that libcap and setcap(8) are now required to install
xbps-src and use it as normal user.

--HG--
extra : convert_revision : 586d6526079e085f86bf3e393459d429f6f0ef99
2010-04-26 14:15:49 +02:00

112 lines
3.2 KiB
Bash

#!/bin/sh
#-
# Copyright (c) 2010 Juan Romero Pardines.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#-
# Umount stuff if SIGINT or SIGQUIT was caught
trap umount_chroot_fs INT QUIT
HANDLER="$1"
. @@XBPS_INSTALL_ETCDIR@@/xbps-src.conf
REQFS="sys proc dev xbps"
mount_chroot_fs()
{
local cnt f blah dowrite
for f in ${REQFS}; do
if [ ! -f ${XBPS_MASTERDIR}/.${f}_mount_bind_done ]; then
unset dowrite
echo -n "=> Mounting /${f} in chroot... "
if [ ! -d ${XBPS_MASTERDIR}/${f} ]; then
mkdir -p ${XBPS_MASTERDIR}/${f}
fi
case ${f} in
xbps)
blah=${XBPS_DISTRIBUTIONDIR}
dowrite="-w"
;;
*) blah=/${f};;
esac
[ ! -d ${blah} ] && echo "failed." && continue
@@XBPS_INSTALL_LIBEXECDIR@@/xbps-src-chroot-capmount \
${dowrite} ${blah} ${XBPS_MASTERDIR}/${f} \
2>/dev/null
if [ $? -eq 0 ]; then
echo 1 > ${XBPS_MASTERDIR}/.${f}_mount_bind_done
echo "done."
else
echo "failed."
fi
else
cnt=$(cat ${XBPS_MASTERDIR}/.${f}_mount_bind_done)
cnt=$((${cnt} + 1))
echo ${cnt} > ${XBPS_MASTERDIR}/.${f}_mount_bind_done
fi
done
}
umount_chroot_fs()
{
local fs dir cnt
for fs in ${REQFS}; do
[ ! -f ${XBPS_MASTERDIR}/.${fs}_mount_bind_done ] && continue
cnt=$(cat ${XBPS_MASTERDIR}/.${fs}_mount_bind_done)
if [ ${cnt} -gt 1 ]; then
cnt=$((${cnt} - 1))
echo ${cnt} > ${XBPS_MASTERDIR}/.${fs}_mount_bind_done
else
echo -n "=> Unmounting ${fs} from chroot... "
@@XBPS_INSTALL_LIBEXECDIR@@/xbps-src-chroot-capumount \
${XBPS_MASTERDIR}/${fs} 2>/dev/null
if [ $? -eq 0 ]; then
rm -f ${XBPS_MASTERDIR}/.${fs}_mount_bind_done
echo "done."
else
echo "failed."
fi
fi
unset fs
done
# Remove created dirs
[ -f ${XBPS_MASTERDIR}/.xbps_mount_bind_done ] && continue
[ -d ${XBPS_MASTERDIR}/xbps ] && rmdir ${XBPS_MASTERDIR}/xbps
}
if [ $# -ne 1 ]; then
echo "$0: mount || umount"
exit 1
fi
case "${HANDLER}" in
mount) mount_chroot_fs;;
umount) umount_chroot_fs;;
*) echo "$0: invalid target." && exit 1;;
esac
exit 0