Reduce unnecessary flash wear and be tidy:
- Run the extraction only if necessary
- Extract temporary file to /tmp
- cleanup after execution
Tested-by: Roger Pueyo Centelles <roger.pueyo@guifi.net>
Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>
local offset=$(($2))
local count=$(($3))
local mtd
- local erdfile="/lib/firmware/erd.bin"
+ local erdfile="/tmp/erd.bin"
+ local fwfile="/lib/firmware/${FIRMWARE}"
+
+ [ -e $fwfile ] && exit 0
mtd=$(find_mtd_chardev $part)
[ -n "$mtd" ] || caldata_die "no mtd device found for partition $part"
rbextract -e $mtd $erdfile
- dd if=$erdfile of=/lib/firmware/$FIRMWARE iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \
+ dd if=$erdfile of=$fwfile iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \
caldata_die "failed to extract calibration data from $mtd"
+
+ rm -f $erdfile
}