Bash equal varibles are not equal

Asked Jun 28 '18 at 23:40

Active Jun 28 '18 at 23:52

Viewed 22 times

Okay so this is driving me crazy and I think it's just a syntax issue

path=$1
ignore=$2

length=$(curl -s -I http://10.10.10.81/$path | grep Length | cut -d " " -f2 | xargs)

if [ "$length" -ne "$ignore" ]; then
        echo $path;
fi

I'm trying to create a simple scanning tool that allows you to pass in the path and the content length to ignore. It's for pages that return 200 and a custom error page.

The problem I'm facing is that the condition is always true. No matter what I do. It's either true or I get an exception.

The above code throws the exception : integer expression expected7

With variations of the code i can get it to run but like I said, it's always true.

A bonus would be if someone knows of a better way to do this. I didn't see a response size option in dirb or wfuzz

I checked the output of both prior to the condition. The values are equal

edited Jun 28 '18 at 23:52

asked Jun 28 '18 at 23:40

DotNetRussell

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So what is the value of `$length` after you set it, and is it what you expect? – aschepler Jun 28 '18 at 23:46
add `echo "length='$length' ignore='$ignore'"` just before the `if` to see what the variables actually are. Be sure to include the quotes so you can see whitespace... – Chris Dodd Jun 28 '18 at 23:47
@ChrisDodd I did this, they're equal – DotNetRussell Jun 28 '18 at 23:47
@aschepler I set 158607 as the ignore length and the length that curl returns is 158607. I echoed both out before the condition along with the path to make sure. – DotNetRussell Jun 28 '18 at 23:48
@AnthonyRussell: so what are they? – Chris Dodd Jun 28 '18 at 23:49
@ChrisDodd they're both 158607. I don't think the value is the problem. I think it's a condition sytax error. – DotNetRussell Jun 28 '18 at 23:50
4

The odd formatting of the error suggests that at least one of the strings contains extra whitespace (perhaps a CR character?), which is causing the problem. That's why I suggested using quotes visible in the output -- make whitespace clearer. – Chris Dodd Jun 29 '18 at 00:00
@ChrisDodd I agree. I'm not having much luck trimming it through. I think it's the curl result but I did xargs which I guess is supposed to trim it. – DotNetRussell Jun 29 '18 at 00:01
1

try `tr -d ' \t\n\r'` – Chris Dodd Jun 29 '18 at 00:02
1

Try using `dos2unix` on the script file – Barmar Jun 29 '18 at 00:03
@ChrisDodd that fixed it thank you – DotNetRussell Jun 29 '18 at 00:03

Bash equal varibles are not equal

0 Answers0