Automount Swap Early
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[edit] Purpose
The script proposed here is a box independent swap mounter. It automatically detects the swap partition on any available hard disk drive (incl. swap on LVM) and turns it on. It can be useful to simplify /etc/fstab or more usefully for a portable system (e.g., USB pen drive).
[edit] Script
File: /etc/init.d/autoswap
#!/sbin/runscript
# Copyright 1999-2006 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $
#
# Autodetect swap partition
# author: Mathias Laurin <mathias_laurin@users.sourceforge.net>
# from the script found at http://gentoo-wiki.com/TIP_automount_swap
# left by an anonymous contributor.
#
# 2006-12-26, v.0.2.0
depend() {
after checkfs
}
do_swap() {
local CMD="$1"
local DEVLIST
local DEV
DEVLIST="$(ls /dev/[h-s]d[a-z][0-9]*)"
# LVM2 support
[ -c /dev/mapper/control ] && DEVLIST="$DEVLIST $(ls /dev/mapper/*)"
for DEV in $DEVLIST
do
FS="$(file -sL "$DEV"| cut -d' ' -f3)"
if [ "$FS" = "swap" ]
then
einfo " $DEV"
$CMD "$DEV"
fi
done
return $?
}
start() {
ebegin "Swap on"
do_swap /sbin/swapon
eend $?
}
stop() {
ebegin "Remove swap from"
do_swap /sbin/swapoff
eend $?
}
[edit] Installation
Making the script executable and adding it to the boot runlevel.
Note: Adding this script to the boot runlevel is recommended but not mandatory
chmod 755 /etc/init.d/my-autoswap
rc-update add my-autoswap boot
