modules.d/90livenet/livenetroot.sh

   1 #!/bin/sh
   2 # livenetroot - fetch a live image from the network and run it
   3
   4 type getarg >/dev/null 2>&1 || . /lib/dracut-lib.sh
   5
   6 . /lib/url-lib.sh
   7
   8 PATH=/usr/sbin:/usr/bin:/sbin:/bin
   9 RETRIES={$RETRIES:-100}
  10 SLEEP={$SLEEP:-5}
  11
  12 [ -e /tmp/livenet.downloaded ] && exit 0
  13
  14 # args get passed from 40network/netroot
  15 netroot="$2"
  16 liveurl="${netroot#livenet:}"
  17 info "fetching $liveurl"
  18
  19 imgfile=
  20 #retry until the imgfile is populated with data or the max retries
  21 for (( i=1; i<=$RETRIES; i++))
  22 do
  23     imgfile=$(fetch_url "$liveurl")
  24
  25     if [ $? != 0 ]; then
  26             warn "failed to download live image: error $?"
  27             imgfile=
  28     fi
  29
  30     if [ ! -z "$imgfile" -a -s "$imgfile" ]; then
  31         break
  32     else
  33         if [ $i -ge $RETRIES ]; then
  34             warn "failed to download live image after $i attempts."
  35             exit 1
  36         fi
  37
  38         sleep $SLEEP
  39     fi
  40 done > /tmp/livenet.downloaded
  41
  42 # TODO: couldn't dmsquash-live-root handle this?
  43 if [ ${imgfile##*.} = "iso" ]; then
  44     root=$(losetup -f)
  45     losetup $root $imgfile
  46 else
  47     root=$imgfile
  48 fi
  49
  50 exec /sbin/dmsquash-live-root $root