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# Copyright 2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# bool do_unmount(char *cmd, char *no_unmounts, char *nodes, char *fslist)
# Handy function to handle all our unmounting needs
# find-mount is a C program to actually find our mounts on our supported OS's
do_unmount() {
local cmd="$1" retval=0 retry=
local f_opts="-m -c" f_kill="-s " mnt=
if [ "${RC_UNAME}" = "Linux" ] ; then
f_opts="-c"
f_kill="-"
fi
local mnts="$(mountinfo ${2:+--skip-regex} $2 ${3:+--node-regex} $3 ${4:+--fstype-regex} $4 --reverse \
| sed -e "s/'/'\\\\''/g" -e "s/^/'/g" -e "s/$/'/g")"
eval set -- ${mnts}
for mnt in "$@" ; do
case "${cmd}" in
umount*)
# If we're using the mount (probably /usr) then don't unmount us
local pids="$(fuser ${f_opts} "${mnt}" 2>/dev/null)"
case " ${pids} " in
*" $$ "*)
ewarn "We are using ${mnt}, not unmounting"
continue
;;
esac
ebegin "Unmounting ${mnt}"
;;
*)
ebegin "Remounting ${mnt}"
;;
esac
retry=3
while ! ${cmd} "${mnt}" 2>/dev/null ; do
# Don't kill if it's us (/ and possibly /usr)
local pids="$(fuser ${f_opts} "${mnt}" 2>/dev/null)"
case " ${pids} " in
*" $$ "*) retry=0 ;;
" ") eend 1 "in use but fuser finds nothing"; retry=0 ;;
*)
local sig="KILL"
[ ${retry} -gt 0 ] && sig="TERM"
fuser ${f_kill}${sig} -k ${f_opts} "${mnt}" \
>/dev/null 2>/dev/null
sleep 1
retry=$((${retry} - 1))
;;
esac
# OK, try forcing things
if [ ${retry} -le 0 ] ; then
local extra_opts="-f"
case "${cmd}" in
mount*)
# Silly reiserfs helper blocks us, so bypass it
[ "${RC_UNAME}" = "Linux" ] && extra_opts="-i"
;;
esac
${cmd} ${extra_opts} "${mnt}" || retry=-999
break
fi
done
if [ ${retry} -eq -999 ] ; then
eend 1
retval=1
else
eend 0
fi
done
return ${retval}
}
# vim: set ts=4 :
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