000503fad7
In the past, OpenRC was a hybrid of a centralized and file-scope license/copyright structure. I followed the instructions from the Software Freedom Law Center [1] to convert to a Centralized structure where possible, for easier future maintenance. [1] https://softwarefreedom.org/resources/2012/ManagingCopyrightInformation.html
88 lines
2.3 KiB
Bash
88 lines
2.3 KiB
Bash
# Copyright (c) 2007-2015 The OpenRC Authors.
|
|
# See the Authors file at the top-level directory of this distribution and
|
|
# https://github.com/OpenRC/openrc/blob/master/AUTHORS
|
|
#
|
|
# This file is part of OpenRC. It is subject to the license terms in
|
|
# the LICENSE file found in the top-level directory of this
|
|
# distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
|
|
# This file may not be copied, modified, propagated, or distributed
|
|
# except according to the terms contained in the LICENSE file.
|
|
|
|
# Declare this here so that no formatting doesn't affect the embedded newline
|
|
__IFS="
|
|
"
|
|
|
|
# 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 present, so if it's not then 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
|
|
local IFS="$__IFS"
|
|
set -- $(mountinfo "$@")
|
|
unset IFS
|
|
for mnt; do
|
|
# Unmounting a shared mount can unmount other mounts, so
|
|
# we need to check the mount is still valid
|
|
mountinfo --quiet "$mnt" || continue
|
|
# Ensure we interpret all characters properly.
|
|
mnt=$(printf "$mnt")
|
|
|
|
case "$cmd" in
|
|
umount)
|
|
ebegin "Unmounting $mnt"
|
|
;;
|
|
*)
|
|
ebegin "Remounting $mnt read only"
|
|
;;
|
|
esac
|
|
|
|
retry=4 # Effectively TERM, sleep 1, TERM, sleep 1, KILL, sleep 1
|
|
while ! LC_ALL=C $cmd "$mnt" 2>/dev/null; do
|
|
if command -v fuser >/dev/null 2>&1; then
|
|
pids="$(timeout -k 10 -s KILL "${rc_fuser_timeout:-60}" \
|
|
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;;
|
|
*)
|
|
if [ $retry -le 0 ]; then
|
|
eend 1
|
|
else
|
|
local sig="TERM"
|
|
: $(( retry -= 1 ))
|
|
[ $retry = 1 ] && sig="KILL"
|
|
fuser $f_kill$sig -k $f_opts \
|
|
"$mnt" >/dev/null 2>&1
|
|
sleep 1
|
|
fi
|
|
;;
|
|
esac
|
|
[ $retry -le 0 ] && break
|
|
done
|
|
if [ $retry -le 0 ]; then
|
|
retval=1
|
|
else
|
|
eend 0
|
|
fi
|
|
done
|
|
return $retval
|
|
}
|