bash script split array of strings to designed output-CodePudding

Data in log file is something like:

"ipHostNumber: 127.0.0.1
ipHostNumber: 127.0.0.2
ipHostNumber: 127.0.0.3"

that's my code snippet:

readarray -t iparray < "$destlog"
unset iparray[0]

for ip in "${iparray[@]}"
do
   IFS=$'\n' read -r -a iparraychanged <<< "${iparray[@]}"
done

And what I wanted to receive is to transfer IP's to another array and then read every line from that array and ping it.

UPDATE: I've acknowledged something, it's probably that I want one array to another but without some string, in this case cut "ipHostNumber: " and have remained only IPs.

Thanks in advance, if there's anything missing please let me know.

CodePudding user response：

Why do you need arrays at all? Just read the input and do the work.

while IFS=' ' read -r _ ip; do
   ping -c1 "$ip"
done < "$destlog"

See https://mywiki.wooledge.org/BashFAQ/001 .

Another way is to use xargs and filtering:

awk '{print $2}' "$destlog" | xargs -P0 -n1 ping -c1

CodePudding user response：

I prefer KamilCuk's xargs solution, but if you just wanted the array because you plan to reuse it -

$: readarray -t ip < <( sed '1d; s/^.* //' file )

Now it's loaded.

$: declare -p ip
declare -a ip=([0]="127.0.0.2" [1]="127.0.0.3")
$: for addr in "${ip[@]}"; do ping -c 1 "$addr"; done