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-rw-r--r--init_functions68
1 files changed, 68 insertions, 0 deletions
diff --git a/init_functions b/init_functions
index 72bf6ae..4ee471b 100644
--- a/init_functions
+++ b/init_functions
@@ -27,3 +27,71 @@ launch_interactive_shell() {
[ "$1" = "--exec" ] && exec /bin/sh -i
/bin/sh -i
}
+
+default_mount_handler() {
+ if [ ${root:0:5} != "/dev/" ] || ! poll_device "${root}" ${rootdelay}; then
+ msg "\nRoot device '${root}' doesn't exist. Attempting to create it."
+ rootdev=""
+ if [ ${root:0:5} = "/dev/" ]; then
+ # It might be a block device (/dev/sda)
+ if [ -f /sys/block/${root:5}/dev ]; then
+ rootdev="$(cat /sys/block/${root:5}/dev | sed 's|:| |')"
+ # It might be a partition on any block device (/dev/sda1)
+ else
+ for dir in /sys/block/*; do
+ if [ -f ${dir}/${root:5}/dev ]; then
+ rootdev="$(cat ${dir}/${root:5}/dev | sed 's|:| |')"
+ break
+ fi
+ done
+ fi
+ # It might be a major/minor pair (8:1)
+ elif echo ${root} | grep -q :; then
+ rootdev="$(echo ${root} | sed 's|:| |')"
+ root="/dev/root"
+ # It might be major/minor encoded as a single hex-number (lilo-style) (801)
+ elif [ ${#root} -le 4 -a ${#root} -gt 2 ] && echo "${root}" | grep -qe '^[A-Fa-f0-9]*$'; then
+ str_offset=$((${#root}-2))
+ major=$(printf "%d" 0x${root:0:${str_offset}})
+ minor=$(printf "%d" 0x${root:${str_offset}})
+ rootdev="${major} ${minor}"
+ root="/dev/root"
+ fi
+ if [ -n "${rootdev}" ]; then
+ msg "Creating root device ${root} with major $(echo "${rootdev}" | cut -d\ -f1) and minor $(echo "${rootdev}" | cut -d\ -f2)."
+ mknod ${root} b ${rootdev}
+ else
+ err "Unable to determine major/minor number of root device '${root}'."
+ echo "You are being dropped to a recovery shell"
+ echo " Type 'exit' to try and continue booting"
+ launch_interactive_shell
+ msg "Trying to continue (this will most likely fail) ..."
+ fi
+ fi
+ # We didn't build filesystem support into busybox,
+ # instead we use util-linux-ng's blkid for best compatibility
+ if [ -n "${rootfstype}" ]; then
+ fstype="${rootfstype}"
+ else
+ fstype=$(eval $(/sbin/blkid -o udev -p "${root}"); echo $ID_FS_TYPE)
+ if [ -z "${fstype}" ]; then
+ err "Unable to determine the file system type of ${root}:"
+ echo "Either it contains no filesystem, an unknown filesystem,"
+ echo "or more than one valid file system signature was found."
+ echo
+ echo "Try adding"
+ echo " rootfstype=your_filesystem_type"
+ echo "to the kernel command line."
+ echo
+ echo "You are now being dropped into an emergency shell."
+ launch_interactive_shell
+ msg "Trying to continue (this will most likely fail) ..."
+ fi
+ fi
+ if [ "${readwrite}" = "yes" ]; then
+ rwopt="rw"
+ else
+ rwopt="ro"
+ fi
+ mount ${fstype:+-t ${fstype}} -o ${rwopt}${rootflags:+,${rootflags}} "${root}" "$1"
+}