add -D, increase default disk size, improve help

dev-utils/fai-kvm

@@ -12,7 +12,7 @@ fix="-k en-us -cpu host -global isa-fdc.driveA= "  # if loading cirrusfb (via pc
 
 vga="-vga std"
 user=1
-size=5   # default size of the disk image
+size=10   # default size of the disk image
 ram=2000
 disks=1
 cdimage=/files/scratch/fai-cd.iso # default name for CD image
@@ -46,24 +46,27 @@ usage() {
 
   cat <<EOF
 
- fai-kvm [options] pxe   # start a host booting with PXE from NIC
+ fai-kvm [options] pxe   # start a host booting using PXE from NIC
  fai-kvm [options] cd [imagename] # start a host booting from a ISO image
 
  -n          create a new empty disk image, which is used as a local disk
  -N          recreate a new empty disk image, even if one already exists
- -s <size>   size of the local disk (GB, defaults to ${size}GB)
- -d <num>    number of local disks (default is one)
- -m <mem>    RAM size (MB, defaults to ${ram}MB)
- -u <num>    user id. This will become the tap device number and a part of the MAC address
-             and part of the disk files names. Each VM must have a unique number.
+ -s <size>   size of the local disk in GB (default is ${size}GB)
+ -d <num>    number of local disks (default is 1)
+ -D <path>   directory, where the disk image files are created (default: $diskdir)
+ -m <mem>    RAM size  inMB (defaults is ${ram}MB)
+ -u <num>    user number. This will become part of the MAC address of the interface
+             of the VM and is the number of the tap device number. It is also used
+             for the file name of the disk files. Each VM must have a unique number.
+             If you have created 9 tap devies you can use the numbers 1 to 9.
  -V          do not use vga std with Bochs extensions, use the kvm default
  -U          Use kvm user networking instead of tap devices
 EOF
   exit 0
 }
 # - - - - - - - - - - - - - - - - - - - - - - - - -
 
-while getopts "UhnNu:s:m:d:V" opt ; do
+while getopts "UhnNu:s:m:d:VD:" opt ; do
     case "$opt" in
         n) newdisk=1    ;;
         N) newdisk=2    ;;
@@ -72,6 +75,7 @@ while getopts "UhnNu:s:m:d:V" opt ; do
         m) ram=$OPTARG ;;
         s) size=$OPTARG ;;
         d) disks=$OPTARG ;;
+        D) diskdir=$OPTARG ;;
         h) usage;;
         V) vga="";;
         ?) die 1 "Unknown option";;