openrc/init.d/mtab.in

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#!@PREFIX@/sbin/runscript
2009-05-01 19:41:40 +05:30
# Copyright (c) 2007-2008 Roy Marples <roy@marples.name>
# Released under the 2-clause BSD license.
description="Update /etc/mtab to match what the kernel knows about"
depend()
{
need root
keyword -prefix
}
start()
{
# /etc/mtab could be a symlink to a location in /proc
if readlink -f /etc/mtab | grep -sq '^/proc/\(self\|[0-9]\+\)/mounts$'
then
einfo "Skipping mtab update (link points to location in /proc)"
return 0
fi
ebegin "Updating /etc/mtab"
if ! echo 2>/dev/null >/etc/mtab; then
ewend 1 "/etc/mtab is not updateable"
return 0
fi
# With / as tmpfs we cannot umount -at tmpfs in localmount as that
# makes / readonly and dismounts all tmpfs even if in use which is
# not good. Luckily, umount uses /etc/mtab instead of /proc/mounts
# which allows this hack to work.
grep -v "^[^ ]* / tmpfs " /proc/mounts > /etc/mtab
# Remove stale backups
rm -f /etc/mtab~ /etc/mtab~~
eend 0
}