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