diff options
Diffstat (limited to 'package/base-files')
-rw-r--r-- | package/base-files/files/lib/upgrade/common.sh | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/package/base-files/files/lib/upgrade/common.sh b/package/base-files/files/lib/upgrade/common.sh index 4d0e6d5..8cfce71 100644 --- a/package/base-files/files/lib/upgrade/common.sh +++ b/package/base-files/files/lib/upgrade/common.sh @@ -206,6 +206,96 @@ get_magic_long() { (get_image "$@" | dd bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2>/dev/null } +export_bootdevice() { + local cmdline uuid disk uevent + local MAJOR MINOR DEVNAME DEVTYPE + + if read cmdline < /proc/cmdline; then + case "$cmdline" in + *block2mtd=*) + disk="${cmdline##*block2mtd=}" + disk="${disk%%,*}" + ;; + *root=*) + disk="${cmdline##*root=}" + disk="${disk%% *}" + ;; + esac + + case "$disk" in + PARTUUID=[a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]-02) + uuid="${disk#PARTUUID=}" + uuid="${uuid%-02}" + for disk in $(find /dev -type b); do + set -- $(dd if=$disk bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "') + if [ "$4$3$2$1" = "$uuid" ]; then + uevent="/sys/class/block/${disk##*/}/uevent" + break + fi + done + ;; + /dev/*) + uevent="/sys/class/block/${disk##*/}/uevent" + ;; + esac + + if [ -e "$uevent" ]; then + . "$uevent" + + export BOOTDEV_MAJOR=$MAJOR + export BOOTDEV_MINOR=$MINOR + return 0 + fi + fi + + return 1 +} + +export_partdevice() { + local var="$1" offset="$2" + local uevent MAJOR MINOR DEVNAME DEVTYPE + + for uevent in /sys/class/block/*/uevent; do + . "$uevent" + if [ $BOOTDEV_MAJOR = $MAJOR -a $(($BOOTDEV_MINOR + $offset)) = $MINOR -a -b "/dev/$DEVNAME" ]; then + export "$var=$DEVNAME" + return 0 + fi + done + + return 1 +} + +get_partitions() { # <device> <filename> + local disk="$1" + local filename="$2" + + if [ -b "$disk" -o -f "$disk" ]; then + v "Reading partition table from $filename..." + + local magic="$(hexdump -v -n 2 -s 0x1FE -e '1/2 "0x%04X"' "$disk")" + if [ "$magic" != 0xAA55 ]; then + v "Invalid partition table on $disk" + exit + fi + + rm -f "/tmp/partmap.$filename" + + local part + for part in 1 2 3 4; do + set -- $(hexdump -v -n 12 -s "$((0x1B2 + $part * 16))" -e '3/4 "0x%08X "' "$disk") + + local type="$(($1 % 256))" + local lba="$(($2))" + local num="$(($3))" + + [ $type -gt 0 ] || continue + + printf "%2d %5d %7d\n" $part $lba $num >> "/tmp/partmap.$filename" + done + fi +} + jffs2_copy_config() { if grep rootfs_data /proc/mtd >/dev/null; then # squashfs+jffs2 |