On 2024-04-02 23:00, Elliott Mitchell wrote:
> Second, appears the ${parameter:offset:length} may not be POSIX. I
> dislike this, but do not object since OpenWRT's shell is built with this
> functionality enabled.
UUOC! Ha. Yes, there are a few non POSIXy things in openwrt ash. A number of
other scripts already take advantage of them so it's OK, if it avoids several
external calls to e.g. cut or td.
How about POSIX native array IFS split?
IFS=' ' set -- $(hexdump -vn 5 -e '5/1 "%02x "' /dev/urandom)
uci -q batch <<-EOF >/dev/null
set network.globals.ula_prefix=fd$1:$2$3:$4$5::/48
commit network
EOF
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