scripts/boot/9990-toram-todisk.sh

   1 #!/bin/sh
   2
   3 #set -e
   4
   5 copy_live_to ()
   6 {
   7         copyfrom="${1}"
   8         copytodev="${2}"
   9         copyto="${copyfrom}_swap"
  10
  11         if [ -z "${MODULETORAM}" ]
  12         then
  13                 size=$(fs_size "" ${copyfrom}/${LIVE_MEDIA_PATH} "used")
  14         else
  15                 MODULETORAMFILE="${copyfrom}/${LIVE_MEDIA_PATH}/${MODULETORAM}"
  16
  17                 if [ -f "${MODULETORAMFILE}" ]
  18                 then
  19                         size=$( expr $(ls -la ${MODULETORAMFILE} | awk '{print $5}') / 1024 + 5000 )
  20                 else
  21                         log_warning_msg "Error: toram-module ${MODULETORAM} (${MODULETORAMFILE}) could not be read."
  22                         return 1
  23                 fi
  24         fi
  25
  26         if [ "${copytodev}" = "ram" ]
  27         then
  28                 # copying to ram:
  29                 freespace=$(awk '/^MemFree:/{f=$2} /^Cached:/{c=$2} END{print f+c}' /proc/meminfo)
  30                 mount_options="-o size=${size}k"
  31                 free_string="memory"
  32                 fstype="tmpfs"
  33                 dev="/dev/shm"
  34         else
  35                 # it should be a writable block device
  36                 if [ -b "${copytodev}" ]
  37                 then
  38                         dev="${copytodev}"
  39                         free_string="space"
  40                         fstype=$(get_fstype "${dev}")
  41                         freespace=$(fs_size "${dev}")
  42                 else
  43                         log_warning_msg "${copytodev} is not a block device."
  44                         return 1
  45                 fi
  46         fi
  47
  48         if [ "${freespace}" -lt "${size}" ]
  49         then
  50                 log_warning_msg "Not enough free ${free_string} (${freespace}k free, ${size}k needed) to copy live media in ${copytodev}."
  51                 return 1
  52         fi
  53
  54         # Custom ramdisk size
  55         if [ -z "${mount_options}" ] && [ -n "${ramdisk_size}" ]
  56         then
  57                 # FIXME: should check for wrong values
  58                 mount_options="-o size=${ramdisk_size}"
  59         fi
  60
  61         # begin copying (or uncompressing)
  62         mkdir "${copyto}"
  63         log_begin_msg "mount -t ${fstype} ${mount_options} ${dev} ${copyto}"
  64         mount -t "${fstype}" ${mount_options} "${dev}" "${copyto}"
  65
  66         if [ "${extension}" = "tgz" ]
  67         then
  68                 cd "${copyto}"
  69                 tar zxf "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
  70                 rm -f "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
  71                 mount -r -o move "${copyto}" "${rootmnt}"
  72                 cd "${OLDPWD}"
  73         else
  74                 if [ -n "${MODULETORAMFILE}" ]
  75                 then
  76                         if [ -x /bin/rsync ]
  77                         then
  78                                 echo " * Copying $MODULETORAMFILE to RAM" 1>/dev/console
  79                                 rsync -a --progress ${MODULETORAMFILE} ${copyto} 1>/dev/console # copy only the filesystem module
  80                         else
  81                                 cp ${MODULETORAMFILE} ${copyto} # copy only the filesystem module
  82                         fi
  83                 else
  84                         if [ -x /bin/rsync ]
  85                         then
  86                                 echo " * Copying whole medium to RAM" 1>/dev/console
  87                                 rsync -a --progress ${copyfrom}/* ${copyto} 1>/dev/console  # "cp -a" from busybox also copies hidden files
  88                         else
  89                                 mkdir -p ${copyto}/${LIVE_MEDIA_PATH}
  90                                 cp -a ${copyfrom}/${LIVE_MEDIA_PATH}/* ${copyto}/${LIVE_MEDIA_PATH}
  91                                 if [ -e ${copyfrom}/${LIVE_MEDIA_PATH}/.disk ]
  92                                 then
  93                                         cp -a ${copyfrom}/${LIVE_MEDIA_PATH}/.disk ${copyto}
  94                                 fi
  95                         fi
  96                 fi
  97
  98                 umount ${copyfrom}
  99                 mount -r -o move ${copyto} ${copyfrom}
 100         fi
 101
 102         rmdir ${copyto}
 103         return 0
 104 }