Release new version 2.13.0

[grml-scripts.git] / usr_sbin / grml2ram

diff --git a/usr_sbin/grml2ram b/usr_sbin/grml2ram
index 16bf33c..0806383 100755 (executable)
--- a/usr_sbin/grml2ram
+++ b/usr_sbin/grml2ram
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # Filename:      grml2ram
 # Purpose:       copy compressed GRML image to RAM
 # Authors:       (c) Michael Schierl <schierlm-public@gmx.de>, (c) Michael Prokop <mika@grml.org>
@@ -8,7 +8,9 @@
 
 set -e
 
+# shellcheck disable=SC1091
 . /etc/grml/lsb-functions
+# shellcheck disable=SC1091
 . /etc/grml/script-functions
 
 check4root || exit 1
@@ -19,12 +21,10 @@ if ! isgrmlcd ; then
    exit 1
 fi
 
-# old linuxrc version:
-[ -d /cdrom ]      && export LIVECD_PATH=/cdrom
-# initramfs layout until around December 2012:
-[ -d /live/image ] && export LIVECD_PATH=/live/image
-# initramfs layout since around December 2012:
-[ -d /lib/live/mount/medium ] && export LIVECD_PATH=/lib/live/mount/medium
+# 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 "$CMDLINE" ]; then
   # if CMDLINE was set from the outside, we're debugging.
@@ -52,7 +52,7 @@ getbootparam(){
 MEDIA_PATH="$(getbootparam live-media-path)"
 MEDIA_PATH="${MEDIA_PATH:-.}"
 
-IMAGE=$(find $LIVECD_PATH/${MEDIA_PATH}/ -name *.squashfs 2>/dev/null | head -1)
+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'
@@ -65,12 +65,13 @@ fi
 
 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
@@ -80,7 +81,7 @@ esac
 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 $!;
 close LOOP;
@@ -98,7 +99,12 @@ fi
 [ -n "$GRMLDEV" ] || GRMLDEV='/dev/cdrom'
 
 einfo "Unmounting cdrom"
-[ -d $LIVECD_PATH ] && umount $LIVECD_PATH || umount /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