Adding upstream version 4.0~a14.

[live-boot-grml.git] / components / 9990-toram-todisk.sh

diff --git a/components/9990-toram-todisk.sh b/components/9990-toram-todisk.sh
new file mode 100755 (executable)
index 0000000..e7938e0
--- /dev/null
+++ b/components/9990-toram-todisk.sh
@@ -0,0 +1,104 @@
+#!/bin/sh
+
+#set -e
+
+copy_live_to ()
+{
+       copyfrom="${1}"
+       copytodev="${2}"
+       copyto="${copyfrom}_swap"
+
+       if [ -z "${MODULETORAM}" ]
+       then
+               size=$(fs_size "" ${copyfrom}/ "used")
+       else
+               MODULETORAMFILE="${copyfrom}/${LIVE_MEDIA_PATH}/${MODULETORAM}"
+
+               if [ -f "${MODULETORAMFILE}" ]
+               then
+                       size=$( expr $(ls -la ${MODULETORAMFILE} | awk '{print $5}') / 1024 + 5000 )
+               else
+                       log_warning_msg "Error: toram-module ${MODULETORAM} (${MODULETORAMFILE}) could not be read."
+                       return 1
+               fi
+       fi
+
+       if [ "${copytodev}" = "ram" ]
+       then
+               # copying to ram:
+               freespace=$(awk '/^MemFree:/{f=$2} /^Cached:/{c=$2} END{print f+c}' /proc/meminfo)
+               mount_options="-o size=${size}k"
+               free_string="memory"
+               fstype="tmpfs"
+               dev="/dev/shm"
+       else
+               # it should be a writable block device
+               if [ -b "${copytodev}" ]
+               then
+                       dev="${copytodev}"
+                       free_string="space"
+                       fstype=$(get_fstype "${dev}")
+                       freespace=$(fs_size "${dev}")
+               else
+                       log_warning_msg "${copytodev} is not a block device."
+                       return 1
+               fi
+       fi
+
+       if [ "${freespace}" -lt "${size}" ]
+       then
+               log_warning_msg "Not enough free ${free_string} (${freespace}k free, ${size}k needed) to copy live media in ${copytodev}."
+               return 1
+       fi
+
+       # Custom ramdisk size
+       if [ -z "${mount_options}" ] && [ -n "${ramdisk_size}" ]
+       then
+               # FIXME: should check for wrong values
+               mount_options="-o size=${ramdisk_size}"
+       fi
+
+       # begin copying (or uncompressing)
+       mkdir "${copyto}"
+       log_begin_msg "mount -t ${fstype} ${mount_options} ${dev} ${copyto}"
+       mount -t "${fstype}" ${mount_options} "${dev}" "${copyto}"
+
+       if [ "${extension}" = "tgz" ]
+       then
+               cd "${copyto}"
+               tar zxf "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
+               rm -f "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
+               mount -r -o move "${copyto}" "${rootmnt}"
+               cd "${OLDPWD}"
+       else
+               if [ -n "${MODULETORAMFILE}" ]
+               then
+                       if [ -x /bin/rsync ]
+                       then
+                               echo " * Copying $MODULETORAMFILE to RAM" 1>/dev/console
+                               rsync -a --progress ${MODULETORAMFILE} ${copyto} 1>/dev/console # copy only the filesystem module
+                       else
+                               cp ${MODULETORAMFILE} ${copyto} # copy only the filesystem module
+                       fi
+               else
+                       if [ -x /bin/rsync ]
+                       then
+                               echo " * Copying whole medium to RAM" 1>/dev/console
+                               rsync -a --progress ${copyfrom}/* ${copyto} 1>/dev/console  # "cp -a" from busybox also copies hidden files
+                       else
+                               mkdir -p ${copyto}/${LIVE_MEDIA_PATH}
+                               cp -a ${copyfrom}/${LIVE_MEDIA_PATH}/* ${copyto}/${LIVE_MEDIA_PATH}
+                               if [ -e ${copyfrom}/${LIVE_MEDIA_PATH}/.disk ]
+                               then
+                                       cp -a ${copyfrom}/${LIVE_MEDIA_PATH}/.disk ${copyto}
+                               fi
+                       fi
+               fi
+
+               umount ${copyfrom}
+               mount -r -o move ${copyto} ${copyfrom}
+       fi
+
+       rmdir ${copyto}
+       return 0
+}