Reading a file
Reading a file allows us to retrieve the stored data from the open channel. To accomplish this Tcl provides the read command. The command utilizes two forms. The syntax is as follows:
read -nonewline channel read channel number
How to do it…
Enter the following command:
\\192.168.0.200\Published-Titles\Published-Titles\Year 2011\Feb\Current-Titles\2985OS_Tcltk Programming Cookbook\Final\E-Book
% set fp [open text.txt r]
file5
% read $fp
Hello World
How it works…
In the first form, the read command reads all the data from the channel. If the optional nonewline switch is provided then the last character of the file is discarded if it is a newline. In the second form, the number argument instructs the command to return the number of ...
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