d95e8a59bb
Use the "1/1" as a iteration count of hexdump expression instead of the broken "1", to fix the issue that the invalid bootnum will be obtained. Currently, the hexdump command always outputs "0" when the decimal format and the iteration count "1" are specified[0]. This is unexpected behaviour, but the cause is unknown and use this fix as a workaround. [0]: https://github.com/openwrt/openwrt/issues/18808 Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com> Link: https://github.com/openwrt/openwrt/pull/18827 Signed-off-by: Robert Marko <robimarko@gmail.com>
88 lines
2 KiB
Bash
88 lines
2 KiB
Bash
#
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# Copyright (C) 2019 OpenWrt.org
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#
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. /lib/functions.sh
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iodata_mstc_prepare_fail() {
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echo "failed to check and prepare the environment, rebooting..."
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umount -a
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reboot -f
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}
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# read/write 1byte in mtd device
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#
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# parameters:
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# $1: target mtd device ("/dev/mtdblockN")
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# $2: offset of target value (decimal or hex)
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# $3: value to set (decimal or hex, don't set when reading)
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iodata_mstc_rw_byte() {
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local mtd="$1"
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local offset="$2"
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local setval="$3"
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local _val=$(hexdump -s $offset -n 1 -e '1/1 "%d"' $mtd)
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if [ -z "$setval" ]; then
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echo $_val
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return 0
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fi
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# decimal or hex -> decimal
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setval=$((setval))
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[ "$_val" = "$setval" ] && return 0
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setval="$(printf '%02x' $setval)"
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if ! (printf "\x$setval" | dd bs=1 seek=$((offset)) conv=notrunc of=$mtd 2>/dev/null); then
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return 1
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fi
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}
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# set flag in mtd device on I-O DATA devices manufactured by MSTC
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# (MitraStar Technology Corp.)
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#
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# parameters:
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# $1: parameter name
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# $2: mtd name contains target flag
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# $3: offset of flag
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# $4: valid flag values ("n,n,...", ex:"0,1" or "1,2")
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# $5: value to set to the flag
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iodata_mstc_set_flag() {
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local name="$1"
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local mtddev="$(find_mtd_part $2)"
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local offset="$3"
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local valid="$4"
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local setval="$5"
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if [ -z "$offset" ]; then
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echo "no $name flag offset provided"
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iodata_mstc_prepare_fail
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fi
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if [ -z "$mtddev" ]; then
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echo "cannot find \"$2\" mtd partition"
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iodata_mstc_prepare_fail
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fi
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local flag=$(iodata_mstc_rw_byte "$mtddev" "$offset")
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local _tmp
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for i in ${valid//,/ }; do
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if [ "$flag" = "$((i))" ]; then
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_tmp=$flag
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break
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fi
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done
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if [ -z "$_tmp" ]; then
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echo "failed to get valid $name flag, please check the value at $offset in $mtddev"
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iodata_mstc_prepare_fail
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fi
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echo "current: $name => $flag"
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if [ "$flag" != "$((setval))" ]; then
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if ! iodata_mstc_rw_byte "$mtddev" "$offset" "$setval"; then
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echo "failed to set \"$name\" flag"
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iodata_mstc_prepare_fail
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fi
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echo " --> set \"$name\" flag to $setval (valid: $valid)"
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fi
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}
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