68 lines
1.5 KiB
Bash
68 lines
1.5 KiB
Bash
# Copyright 2007-2008 Roy Marples <roy@marples.name>
|
|
# All rights reserved. Released under the 2-clause BSD license.
|
|
|
|
# Handy function to handle all our unmounting needs
|
|
# mountinfo is a C program to actually find our mounts on our supported OS's
|
|
# We rely on fuser being preset, so if it's not then we don't unmount anything.
|
|
# This isn't a real issue for the BSD's, but it is for Linux.
|
|
do_unmount()
|
|
{
|
|
local cmd="$1" retval=0 retry= pids=-
|
|
local f_opts="-m -c" f_kill="-s " mnt=
|
|
if [ "${RC_UNAME}" = "Linux" ]; then
|
|
f_opts="-m"
|
|
f_kill="-"
|
|
fi
|
|
|
|
shift
|
|
mountinfo "$@" | while read mnt; do
|
|
# Unmounting a shared mount can unmount other mounts, so
|
|
# we need to check the mount is still valid
|
|
mountinfo --quiet "${mnt}" || continue
|
|
|
|
case "${cmd}" in
|
|
umount*)
|
|
ebegin "Unmounting ${mnt}"
|
|
;;
|
|
*)
|
|
ebegin "Remounting ${mnt}"
|
|
;;
|
|
esac
|
|
|
|
retry=3
|
|
while ! LC_ALL=C ${cmd} "${mnt}" 2>/dev/null; do
|
|
if type fuser >/dev/null 2>&1; then
|
|
pids="$(fuser ${f_opts} "${mnt}" 2>/dev/null)"
|
|
fi
|
|
case " ${pids} " in
|
|
*" $$ "*)
|
|
eend 1 "failed because we are using" \
|
|
"${mnt}"
|
|
retry=0;;
|
|
" - ")
|
|
eend 1
|
|
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>&1
|
|
sleep 1
|
|
retry=$((${retry} - 1))
|
|
;;
|
|
esac
|
|
[ ${retry} -le 0 ] && break
|
|
done
|
|
if [ ${retry} -le 0 ]; then
|
|
eend 1
|
|
retval=1
|
|
else
|
|
eend 0
|
|
fi
|
|
done
|
|
return ${retval}
|
|
}
|