+SOURCES_LIST_FILE='/etc/grml/fai/apt/sources.list'
+# }}}
+
+# usage information {{{
+usage()
+{
+ echo "
+$PN - build process script for generating a (grml based) Linux Live-ISO
+
+Usage: $PN [options, see as follows]
+
+ -a <architecture> architecture; available values: i386 and amd64
+ -b build the ISO without updating the chroot via FAI
+ -B build the ISO without touching the chroot (skips cleanup)
+ -c <classe[s]> classes to be used for building the ISO via FAI
+ -C <configfile> configuration file for grml-live
+ -F force execution without prompting
+ -g <grml_name>] set the grml flavour name
+ -h display short usage information and exit
+ -i <iso_name> name of ISO
+ -o <output_directory> main output directory of the build process
+ -q skip mksquashfs
+ -r <release_name< release name
+ -s <suite> Debian suite; values: etch, lenny, squeeze, sid
+ -t <template_directory> place of the templates
+ -u update existing chroot instead of rebuilding it from scratch
+ -v <version_number> specify version number of the release
+ -V increase verbosity in the build process
+ -z use ZLIB instead of LZMA compression (depends on
+ squashfs-tools version)
+
+Usage examples:
+
+ $PN
+ $PN -c GRMLBASE,GRML_MEDIUM,I386 -o /dev/shm/grml
+ $PN -c GRMLBASE,GRML_SMALL,REMOVE_DOCS,I386 -g grml-small -v 1.0
+ $PN -c GRMLBASE,GRML_FULL,I386 -i grml_0.0-1.iso -v 0.0-1
+ $PN -c GRMLBASE,GRML_FULL,I386 -s sid -V -r 'grml-live rocks'