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|
#!/bin/sh
# This script invalidates any stale swsusp and Software Suspend 2 images. It
# searches all swap partitions on your machine, as well as Suspend2's
# filewriter files (by way of the hibernate script telling it where to find
# it).
#
# It should be called on boot, after mounting filesystems, but before enabling
# swap or clearing out /var/run. Copy this into /etc/init.d/ (or the appropriate
# place on your system), then add a symlink at the appropriate point on boot.
# On a Debian system, you would do this:
# update-rc.d hibernate-cleanup.sh start 31 S .
#
# On other SysV-based systems, you would do something like:
# ln -s ../init.d/hibernate-cleanup.sh /etc/rcS.d/S31hibernate-cleanup.sh
HIBERNATE_FILEWRITER_TRAIL="/var/run/suspend2_filewriter_image_exists"
get_part_label() {
local ID_FS_LABEL
eval "$(vol_id -x $1 2> /dev/null)"
echo "$ID_FS_LABEL"
}
get_part_uuid() {
local ID_FS_UUID
eval "$(vol_id -x $1 2> /dev/null)"
echo "$ID_FS_UUID"
}
get_swap_id() {
local line
fdisk -l 2>/dev/null | while read line; do
case "$line" in
/*Linux\ [sS]wap*) echo "${line%% *}"
esac
done
}
clear_swap() {
local where wason label uuid
where=$1
wason=
test x"$2" = x || label="-L $2"
test x"$3" = x || uuid="-U $3"
swapoff $where 2>/dev/null && wason=yes
mkswap $where $label $uuid > /dev/null || echo -n " (failed: $?)"
[ -n "$wason" ] && swapon $where
}
check_swap_sig() {
local part="$(get_swap_id)"
local where what type rest p c dev label
while read where what type rest ; do
test "$type" = "swap" || continue
c=continue
dev=
label=
for p in $part ; do
case "$where" in
LABEL=* )
test x"$(get_part_label $p)" = x"${where#LABEL=}" && {
c=:
dev=$p
label=${where#LABEL=}
}
;;
UUID=* )
test x"$(get_part_uuid $p)" = x"${where#UUID=}" && {
c=:
dev=$p
uuid=${where#UUID=}
}
;;
* )
test "$p" = "$where" && {
c=:
dev=$p
}
;;
esac
done
$c
case "$(dd if=$dev bs=1 count=6 skip=4086 2>/dev/null)" in
ULSUSP|S1SUSP|S2SUSP|pmdisk|[zZ]*)
echo -n "$dev"
clear_swap $dev "$label" "$uuid"
echo -n ", "
esac
done < /etc/fstab
}
check_filewriter_sig() {
local target
[ -f "$HIBERNATE_FILEWRITER_TRAIL" ] || return
read target < $HIBERNATE_FILEWRITER_TRAIL
[ -f "$target" ] || return
case "`dd \"if=$target\" bs=8 count=1 2>/dev/null`" in
HaveImag)
/bin/echo -ne "Suspend2\n\0\0" | dd "of=$target" bs=11 count=1 conv=notrunc 2>/dev/null
echo -n "$target, "
rm -f $HIBERNATE_FILEWRITER_TRAIL
esac
}
case "$1" in
start)
echo -n "Invalidating stale software suspend images... "
check_swap_sig
check_filewriter_sig
echo "done."
;;
stop|restart|force-reload)
;;
*)
echo "Usage: /etc/init.d/hibernate {start|stop|restart|force-reload}"
esac
exit 0
|
