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| <h3 class="section">8.134 <code>ISATTY</code> — Whether a unit is a terminal device.</h3> |
| |
| <p><a name="index-ISATTY-772"></a><a name="index-system_002c-terminal-773"></a> |
| <dl> |
| <dt><em>Description</em>:<dd>Determine whether a unit is connected to a terminal device. |
| |
| <br><dt><em>Standard</em>:<dd>GNU extension |
| |
| <br><dt><em>Class</em>:<dd>Function |
| |
| <br><dt><em>Syntax</em>:<dd><code>RESULT = ISATTY(UNIT)</code> |
| |
| <br><dt><em>Arguments</em>:<dd> |
| <p><table summary=""><tr align="left"><td valign="top" width="15%"><var>UNIT</var> </td><td valign="top" width="70%">Shall be a scalar <code>INTEGER</code>. |
| <br></td></tr></table> |
| |
| <br><dt><em>Return value</em>:<dd>Returns <code>.TRUE.</code> if the <var>UNIT</var> is connected to a terminal |
| device, <code>.FALSE.</code> otherwise. |
| |
| <br><dt><em>Example</em>:<dd> |
| <pre class="smallexample"> PROGRAM test_isatty |
| INTEGER(kind=1) :: unit |
| DO unit = 1, 10 |
| write(*,*) isatty(unit=unit) |
| END DO |
| END PROGRAM |
| </pre> |
| <br><dt><em>See also</em>:<dd><a href="TTYNAM.html#TTYNAM">TTYNAM</a> |
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