Release new version 2.13.0

[grml-scripts.git] / usr_sbin / grml2ram

diff --git a/usr_sbin/grml2ram b/usr_sbin/grml2ram
index bbd4bd6..0806383 100755 (executable)
--- a/usr_sbin/grml2ram
+++ b/usr_sbin/grml2ram
@@ -1,15 +1,16 @@
-#!/bin/sh
+#!/bin/bash
 # 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>
+# Authors:       (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
 
+# shellcheck disable=SC1091
 . /etc/grml/lsb-functions
+# shellcheck disable=SC1091
 . /etc/grml/script-functions
 
 check4root || exit 1
@@ -20,37 +21,91 @@ if ! isgrmlcd ; then
    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
+# initramfs layout since December 2012, backwards compatibility:
+[ -d /lib/live/mount/medium ] && export LIVECD_PATH='/lib/live/mount/medium'
+# initramfs layout since December 2018:
+[ -d /run/live/medium ] && export LIVECD_PATH='/run/live/medium'
+
+if [ -z "$CMDLINE" ]; then
+  # if CMDLINE was set from the outside, we're debugging.
+  # otherwise, take CMDLINE from Kernel and config files.
+  CMDLINE="$(cat /proc/cmdline)"
+  [ -d ${LIVECD_PATH}/bootparams/ ] && CMDLINE="$CMDLINE $(cat ${LIVECD_PATH}/bootparams/* | tr '\n' ' ')"
+fi
+
+getbootparam(){
+  local line
+  local ws
+  ws='  '
+  line=" $CMDLINE "
+  case "$line" in
+    *[${ws}]"$1="*)
+      result="${line##*[$ws]$1=}"
+      result="${result%%[$ws]*}"
+      echo "$result"
+      return 0 ;;
+    *) # no match?
+      return 1 ;;
+  esac
+}
+
+MEDIA_PATH="$(getbootparam live-media-path)"
+MEDIA_PATH="${MEDIA_PATH:-.}"
+
+IMAGE=$(find "${LIVECD_PATH}/${MEDIA_PATH}/" -name "*.squashfs" 2>/dev/null | head -1)
+if ! [ -r "$IMAGE" ] ; then
+   if [ -r /cdrom/GRML/GRML ] ; then
+      IMAGE='/cdrom/GRML/GRML'
+   else
+      eerror "Can not access grml squashfs file."
+      eerror "Looks like you did run grml2ram already?" ; eend 1
+      exit 1
+   fi
 fi
 
-GRMLSIZE=$(du /cdrom/GRML/GRML | awk '{print $1}')
+GRMLSIZE="$(du $IMAGE | awk '{print $1}')"
 RAM=$(/usr/bin/gawk '/MemFree/{print $2}' /proc/meminfo)
+LOOPDEV=$(/sbin/losetup -j "${IMAGE}" -n -O NAME)
 
 case "$*" in -f|--force)
   ewarn "Forcing copy process for grml-image (${GRMLSIZE}kB) as requested via force option." ; eend 0
    ;;
   *)
-   if test $RAM -lt $GRMLSIZE ; then
+   if test "$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
+einfo "Copying $IMAGE to RAM, this might take a while."
+rsync -a --progress $IMAGE /tmp/GRML
 LANGUAGE=C LANG=C LC_ALL=C perl << EOF
-open LOOP, '</dev/loop0' or die $!;
+open LOOP, '<${LOOPDEV}' or die $!;
 open DEST, '</tmp/GRML' or die $!;
-ioctl(LOOP, 0x4C06, fileno(DEST)) or die $!
+ioctl(LOOP, 0x4C06, fileno(DEST)) or die $!;
 close LOOP;
 close DEST;
 EOF
 
-einfo "Unmounting /cdrom."
-umount /cdrom ; eend $?
-einfo "Now you can eject your grml-cd (e.g. run 'eject /dev/cdrom')." ; eend 0
+# identify cd-rom:
+GRMLDEV=$(awk '{if ($2 ~ /^\/lib\/live\/mount\/medium$/ ) print $1}' /etc/mtab)
+if [ -z "$GRMLDEV" ]; then
+  GRMLDEV=$(awk '{if ($2 ~ /^\/live\/image$/ ) print $1}' /etc/mtab)
+fi
+if [ -z "$GRMLDEV" ]; then
+   GRMLDEV=$(awk '{if ($2 ~ /^\/cdrom$/ ) print $1}' /etc/mtab)
+fi
+[ -n "$GRMLDEV" ] || GRMLDEV='/dev/cdrom'
+
+einfo "Unmounting cdrom"
+if [ -d $LIVECD_PATH ] ;
+then
+  umount $LIVECD_PATH
+else
+  umount /cdrom
+fi
+eend $?
+einfo "Now you can eject your grml-cd (e.g. run 'eject $GRMLDEV')." ; eend 0
 
 ## END OF FILE #################################################################