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Shell Programming and Scripting

Doubt in Query..

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# 1  
Old 10-28-2013
Doubt in Query..
Hi all..

I have a shell script in which I have a line

Code:
while read -u3 line; do
read -u3 line

Can someone please let me know what does that u3 denotes?

Thanks in advance,
Sathya V.
Last edited by jim mcnamara; 10-28-2013 at 07:42 AM.. Reason: code tags
# 2  
Old 10-28-2013
Quote:
The option -u can be used to specify a one digit file descriptor unit unit to read from. The file descriptor can be opened with the exec special built-in command. The default value of unit n is 0.
Ref. Korn Shell 93 man pages.
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