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Diffstat (limited to 'sh/rc-mount.sh')
| -rw-r--r-- | sh/rc-mount.sh | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/sh/rc-mount.sh b/sh/rc-mount.sh new file mode 100644 index 0000000..67ea203 --- /dev/null +++ b/sh/rc-mount.sh @@ -0,0 +1,70 @@ +# 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 + ${cmd} -f "${mnt}" || retry=-999 + 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 : |