diff options
| -rwxr-xr-x | lx-trainer-vm/dd-multi.sh | 63 |
1 files changed, 27 insertions, 36 deletions
diff --git a/lx-trainer-vm/dd-multi.sh b/lx-trainer-vm/dd-multi.sh index 2af3798..998aaf5 100755 --- a/lx-trainer-vm/dd-multi.sh +++ b/lx-trainer-vm/dd-multi.sh @@ -6,14 +6,14 @@ usage_exit() echo echo "usage: $0 src [--layer=tarball]... dest [dest]..." echo - echo "example: copying image to devs sde, sdf, sdg" + echo "example: copying image to devices: sde, sdf, sdg" echo "$0 lx-trainer.img /dev/sde /dev/sdf /dev/sdg" echo exit 1 } if [ `id -u` -ne 0 ]; then - echo "error: this script must be run as root" + echo "error: sorry, this script must be run as root" exit 1 fi @@ -29,22 +29,22 @@ LAYERS="" DESTS="" for arg in $@; do -case $arg in ---layer=*) - LAYERS="$LAYERS `echo $arg | sed -e 's/^--layer=//'`" - ;; ---*) - echo "error: unknown option: $arg" - usage_exit - ;; -*) - if [ -z "$SRC" ]; then - SRC="$arg" - else - DESTS="$DESTS $arg" - fi - ;; -esac + case $arg in + --layer=*) + LAYERS="$LAYERS `echo $arg | sed -e 's/^--layer=//'`" + ;; + --*) + echo "error: unknown option: $arg" + usage_exit + ;; + *) + if [ -z "$SRC" ]; then + SRC="$arg" + else + DESTS="$DESTS $arg" + fi + ;; + esac done # source must be file or block device @@ -61,31 +61,22 @@ for dest in $DESTS; do fi done -# check if we are root (but keep going) -if [ `id -u` -ne 0 ]; then - echo "warning: not root, may not work" -fi +# delete mbr's and rescan devices +dd if=/dev/zero bs=1M count=10 | tee $DESTS > /dev/null +partprobe $DESTS -# delete mbr -for dest in $DESTS; do - dd if=/dev/zero of=$dest bs=1M count=1 & -done -wait - -partprobe - -# efficiently copy source to all destinations +# efficiently copy source to all destinations and rescan devices cat $SRC | tee $DESTS > /dev/null - -partprobe +partprobe $DESTS # add 2nd partition for dest in $DESTS; do - /bin/echo -e "n\np\n\n\n\nw" | fdisk $dest & + /bin/echo -e "n\np\n\n\n\nw" | fdisk $dest done -wait +sync -partprobe +# rescan devices +partprobe $DESTS # create ext4 on 2nd partition for dest in $DESTS; do |