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Check output device is a terminal: Difference between revisions
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There is no explicit way (ie <tt>isatty()</tt>)to do this; however, if we ''assume'' that standard out ''is'' a terminal, we can check if the output stream has been redirected (presumably to something other than a terminal).
<lang Nemerle>def isTerm = System.Console.IsOutputRedirected;</lang>
=={{header|Nim}}==
Using function "isatty" of standard module "terminal" which accepts a File as argument.
As we want to redirect stdout, we write the messages on stderr.
<lang Nim>import terminal
stderr.write if stdout.isatty: "stdout is a terminal\n" else: "stdout is not a terminal\n"</lang>
{{out}}
<pre>Command: ./check_output_dev
Result: stdout is a terminal</pre>
<pre>Command: ./check_output_dev >somefile
Result: stdout is not a terminal</pre>
=={{header|OCaml}}==
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