Hi Pravin, I could have used any file descriptor, but I used 3 because 0,1 and 2 are taken by stdin, stdout and stderr. At the bottom of the loop I am redirecting file descriptor 3 to take its input from the file "2.txt" so that is is local to the loop, meaning that once the loop finishes the file gets closed and the redirect is ended.
Inside the loop I am using two read statements, the first is reading from stdin, which is the default, that is why it can be left out, but I could have written:
Code:
while read file<&0 && read link<&3
and the other is readiing from the file descriptor defined at the bottom of the loop.
---
Likewise I also could have written:
Code:
done 0<file1 3<file2
Last edited by Scrutinizer; 03-07-2014 at 04:22 AM..
This User Gave Thanks to Scrutinizer For This Post:
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abdul (4 Replies)
03-07-2014
