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I wrote this script to get some files off a webcam server. The files, are all downloaded, but when I was running the script, the last line never ends, even after the file was downloaded. So, I would like to know why. Why did this script never terminate? The wget command got the last file, but did not exit. 

#!/bin/bash 
x="127.0.0.1"  
z=0
while read line
do z=$(($z+1));
echo $x${line//};
wget $x${line//};
done < "/home/jay/Desktop/PINGS"
read

So why doesn't this script terminate?

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1 Answer 1

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The last line contains just read.

Read the help page of read, from help read:

Read a line from the standard input and split it into fields.

So unless you give input to read via STDIN, it will be blocked indefinitely.

In a script, read is normally used to read lines(s) from file(s) or to take user input (like your case).

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  • I totally spaced out on that. thanks for pointing it out.
    – j0h
    Dec 15, 2015 at 13:17

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