[SOLVED] Chaining seq after another seq failure

Issue

I have two numbers that wrap over 255, let's say 254 and 2 I want to generate a sequence of "254 255 0 1 2"

So far I've tried following methods:

echo $(seq 254 2 || (seq 254 255 && seq 0 2))
echo $( (seq 254 2 || seq 253 255) && seq 0 2 )
echo $(seq 254 2 || seq 254 255 && seq 0 2)

Which return "", "0 1 2" and "0 1 2" respectively How can I achieve my desired result?

Solution

bash

myseq() {
    local mod=$1 start=$2 stop=$3
    while true; do 
        echo "$start"
        (( start == stop )) && break
        start=$(( (start + 1) % mod ))
    done
}

Then

$ myseq 256 254 2
254
255
0
1
2

Answered By - glenn jackman

Answer Checked By - Candace Johnson (WPSolving Volunteer)