check for existence of /etc/grml and /live

[grml-live.git] / remaster / grml-live-remaster

diff --git a/remaster/grml-live-remaster b/remaster/grml-live-remaster
index 15aec22..39cc81b 100755 (executable)
--- a/remaster/grml-live-remaster
+++ b/remaster/grml-live-remaster
@@ -14,9 +14,9 @@
 
 # define function getfilesize before "set -e"
 if stat --help >/dev/null 2>&1; then
-       getfilesize='stat -c %s'        # GNU stat
+  getfilesize='stat -c %s'      # GNU stat
 else
-       getfilesize='stat -f %z'        # BSD stat
+  getfilesize='stat -f %z'      # BSD stat
 fi
 
 set -e # exit on any error
@@ -24,13 +24,30 @@ set -e # exit on any error
 VERSION='0.0.2'
 GRML_LIVE_EDITOR=${VISUAL:-${EDITOR:-vi}}
 
+if [ ! -d /etc/grml -o ! -d /live ]; then
+    echo "Error: $0 has to be run from a Grml live session. Exiting."
+    exit 1
+fi
+
 # source core functions {{{
 . /etc/grml/lsb-functions
 . /etc/grml/script-functions
 # }}}
 
 # make sure we have what we need {{{
-check4progs mkisofs mksquashfs stat || exit 1
+check4progs mkisofs stat || exit 1
+
+# allow overriding via environment:
+if [ -z "$MKSQUASHFS" ] ; then
+  if which mksquashfs-lzma >/dev/null 2>&1 ; then
+    MKSQUASHFS=mksquashfs-lzma
+  elif which mksquashfs >/dev/null 2>&1 ; then
+    MKSQUASHFS=mksquashfs
+  else
+    echo "Error: neither mksquashfs-lzma nor mksquashfs present. Exiting."
+    exit 1
+  fi
+fi
 check4root || exit 1
 # }}}
 
@@ -43,7 +60,7 @@ if [ x"$1" == x ]; then
    echo "  first, because grml-live-remaster will need a lot ot RAM."
    echo ""
    echo "Please report bugs and feature requests: http://grml.org/bugs/"
-   exit -1
+   exit 1
 fi
 
 if [ ! -d /remaster ]; then
@@ -107,7 +124,7 @@ sed 3,4d "${BOOTSTUFF}"/boot.msg \
 sed 1,2d /remaster/msg >>/remaster/iso/boot/isolinux/boot.msg
 
 mkdir /remaster/iso/live
-mksquashfs /remaster/chroot /remaster/iso/live/"$(basename $SQUASHFS_FILE)"
+$MKSQUASHFS /remaster/chroot /remaster/iso/live/"$(basename $SQUASHFS_FILE)"
 umount /remaster/chroot /remaster/cdrom
 
 if [ -f /remaster/iso/boot/isolinux/isolinux.bin ] ; then
@@ -123,12 +140,12 @@ mkisofs -b $ISOLINUX -no-emul-boot -c $ISOLINUX_BOOTCAT \
         -l -r -J -o "$1" /remaster/iso
 # pad for partition table
 siz=$($getfilesize "$1")
-cyls=$((siz / 512 / 32 / 16 + 1))      # C=$cyls H=16 S=32 (= 256 KiB units)
-siz=$((cyls * 16 * 32 * 512))          # size after padding
+cyls=$((siz / 512 / 32 / 16 + 1))       # C=$cyls H=16 S=32 (= 256 KiB units)
+siz=$((cyls * 16 * 32 * 512))           # size after padding
 dd if=/dev/zero bs=1 count=1 seek=$((siz - 1)) of="$1" 2>/dev/null
 rm -R /remaster/iso
 
-# here is the place to apply bootgrub.mksh ☺
+# here is the place where we could apply bootgrub.mksh
 
 echo ""
 echo "ISO generation complete:"