I would like to propose the following patch that adds a "noswap" Kernel parameter that disables casper's automatic discovery and activation of any present swap partitions. The purpose is to not have the drives and drivers in use so that they can be accessed or unloaded without issue.
=== modified file 'debian/manpage/casper.7'
--- old/debian/manpage/casper.7 2010-11-29 12:49:36 +0000
+++ new/debian/manpage/casper.7 2013-06-27 22:21:58 +0000
@@ -88,6 +88,11 @@
.TP
.BI noprompt
Do not prompt to eject the CD on reboot.
+.TP
+.BI noswap
+Adding this parameter, casper will not attempt to find and activate swap partitions requiring manual use of
+.B swapon
+as needed. This is useful to avoid accessing drives that may be present in the system.
I would like to propose the following patch that adds a "noswap" Kernel parameter that disables casper's automatic discovery and activation of any present swap partitions. The purpose is to not have the drives and drivers in use so that they can be accessed or unloaded without issue.
=== modified file 'debian/ manpage/ casper. 7' manpage/ casper. 7 2010-11-29 12:49:36 +0000 manpage/ casper. 7 2013-06-27 22:21:58 +0000
--- old/debian/
+++ new/debian/
@@ -88,6 +88,11 @@
.TP
.BI noprompt
Do not prompt to eject the CD on reboot.
+.TP
+.BI noswap
+Adding this parameter, casper will not attempt to find and activate swap partitions requiring manual use of
+.B swapon
+as needed. This is useful to avoid accessing drives that may be present in the system.
.SH FILES
.B /etc/casper.conf
=== modified file 'scripts/casper'
export CMD_USERFULLNAM E="${x# userfullname= }" ;;
username= *)
export CMD_USERNAME= "${x#username= }" ;;
--- old/scripts/casper 2013-05-28 10:19:04 +0000
+++ new/scripts/casper 2013-06-27 22:23:14 +0000
@@ -71,6 +71,8 @@
+ noswap)
+ export DISABLE_SWAP="Yes" ;;
esac
done
if [ "${UNIONFS}" = "" ]; then
=== modified file 'scripts/ casper- bottom/ 13swap' casper- bottom/ 13swap 2013-03-13 14:24:28 +0000 casper- bottom/ 13swap 2013-06-27 22:23:36 +0000
--- old/scripts/
+++ new/scripts/
@@ -22,25 +22,29 @@
log_begin_msg "$DESCRIPTION"
devices="" d[a-z][ 0-9]*; do d[a-z][ 0-9]*; do
-for device in /dev/[hsv]
- if ! [ -b "$device" ]; then
- continue
- fi
-
- /sbin/blkid -o udev -p ${device%%[0-9]*} | grep -q "^ID_FS_USAGE=raid" && continue
-
- magic=$(/bin/dd if="$device" bs=4086 skip=1 count=1 2>/dev/null | /bin/dd bs=10 count=1 2>/dev/null) || continue
-
- if [ "$magic" = "SWAPSPACE2" -o "$magic" = "SWAP-SPACE" ]; then
-# log "Found $device"
- devices="$devices $device"
+if [[ -n "$DISABLE_SWAP" ]]; then
+ echo -n "disabled via kernel cmdline: noswap."
+else
+ for device in /dev/[hsv]
+ if ! [ -b "$device" ]; then
+ continue
fi
-done
-
-for device in $devices; do
- cat >> $FSTAB <<EOF
+
+ /sbin/blkid -o udev -p ${device%%[0-9]*} | grep -q "^ID_FS_USAGE=raid" && continue
+
+ magic=$(/bin/dd if="$device" bs=4086 skip=1 count=1 2>/dev/null | /bin/dd bs=10 count=1 2>/dev/null) || continue
+
+ if [ "$magic" = "SWAPSPACE2" -o "$magic" = "SWAP-SPACE" ]; then
+# log "Found $device"
+ devices="$devices $device"
+ fi
+ done
+
+ for device in $devices; do
+ cat >> $FSTAB <<EOF
$device swap swap defaults 0 0
EOF
-done
+ done
+fi
log_end_msg