mjhjmtu

I am trying to compare two IP address using bc command however the IP with lower numeric value is not being trapped in the test.

Here is my code:

TEST=$(echo "$i < $IP_BRD && $i > $IP_LOW " | bc -q )

If TEST results to 1, the process continues else exits.

check the below example:

++ echo '191.35 < 187.254 && 191.35 > 184.1 '
+ TEST=0
++ echo '191.35 < 191.254 && 191.35 > 188.1 '
++ bc -q
+ TEST2=0
++ echo '191.35 < 195.254 && 191.35 > 192.1 '
++ bc -q
+ TEST3=0
+ [[ 0 = 1 ]]
+ [[ 0 = 1 ]]
+ [[ 0 = 1 ]]

In line echo '191.35 < 191.254 && 191.35 > 188.1 ' the IP 191.35 is less than 191.254 however its not being seen as it.

I have tried double quoutes in the TEST=$(echo "$i < $IP_BRD && $i > $IP_LOW " | bc -q ) however didnt had much success.

Any ideas how to fix it ?

In line echo '191.35 < 191.254 && 191.35 > 188.1 ' the IP 191.35 is less than 191.254 however its not being seen as it.

No, it's not: 191.35 == 191.350 > 191.254. bc compares them numerically, it can't compare IPs directly. You should convert the IP to integer first. Then you can compare them using shell built-ins without resorting to external tools.

Edit: check out this thread: IP Address Converter