add script grml2ram and manpage for grml2ram

[grml-scripts.git] / usr_sbin / grml2ram

diff --git a/usr_sbin/grml2ram b/usr_sbin/grml2ram
new file mode 100755 (executable)
index 0000000..bbd4bd6
--- /dev/null
+++ b/usr_sbin/grml2ram
@@ -0,0 +1,56 @@
+#!/bin/sh
+# Filename:      grml2ram
+# Purpose:       copy compressed GRML image to RAM
+# Authors:       grml-team (grml.org), (c) Michael Schierl <schierlm-public@gmx.de>, (c) Michael Prokop <mika@grml.org>
+# Bug-Reports:   see http://grml.org/bugs/
+# License:       This file is licensed under the GPL v2.
+# Latest change: Die Dez 12 19:55:05 CET 2006 [mika]
+################################################################################
+
+set -e
+
+. /etc/grml/lsb-functions
+. /etc/grml/script-functions
+
+check4root || exit 1
+check4progs rsync gawk || exit 2
+
+if ! isgrmlcd ; then
+   eerror "Not running grml in live-cd mode. Nothing to be done, exiting." ; eend 1
+   exit 1
+fi
+
+if ! [ -r /cdrom/GRML/GRML ] ; then
+   eerror "Can not access /cdrom/GRML/GRML. Looks like you did run grml2ram already?" ; eend 1
+   exit 1
+fi
+
+GRMLSIZE=$(du /cdrom/GRML/GRML | awk '{print $1}')
+RAM=$(/usr/bin/gawk '/MemFree/{print $2}' /proc/meminfo)
+
+case "$*" in -f|--force)
+  ewarn "Forcing copy process for grml-image (${GRMLSIZE}kB) as requested via force option." ; eend 0
+   ;;
+  *)
+   if test $RAM -lt $GRMLSIZE ; then
+      eerror "Sorry, not enough free RAM (${RAM}kB) available for grml-image (${GRMLSIZE}kB)." ; eend 1
+      exit 1
+   fi
+   ;;
+esac
+
+einfo "Copying /cdrom/GRML/GRML to RAM, this might take a while."
+rsync -a --progress /cdrom/GRML/GRML /tmp/GRML
+LANGUAGE=C LANG=C LC_ALL=C perl << EOF
+open LOOP, '</dev/loop0' or die $!;
+open DEST, '</tmp/GRML' or die $!;
+ioctl(LOOP, 0x4C06, fileno(DEST)) or die $!
+close LOOP;
+close DEST;
+EOF
+
+einfo "Unmounting /cdrom."
+umount /cdrom ; eend $?
+einfo "Now you can eject your grml-cd (e.g. run 'eject /dev/cdrom')." ; eend 0
+
+## END OF FILE #################################################################