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| <title>The GNU Fortran Compiler: ISATTY</title> |
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| <a name="ISATTY-_002d_002d_002d-Whether-a-unit-is-a-terminal-device_002e"></a> |
| <h3 class="section">9.148 <code>ISATTY</code> — Whether a unit is a terminal device.</h3> |
| <a name="index-ISATTY"></a> |
| <a name="index-system_002c-terminal"></a> |
| |
| <dl compact="compact"> |
| <dt><em>Description</em>:</dt> |
| <dd><p>Determine whether a unit is connected to a terminal device. |
| </p> |
| </dd> |
| <dt><em>Standard</em>:</dt> |
| <dd><p>GNU extension |
| </p> |
| </dd> |
| <dt><em>Class</em>:</dt> |
| <dd><p>Function |
| </p> |
| </dd> |
| <dt><em>Syntax</em>:</dt> |
| <dd><p><code>RESULT = ISATTY(UNIT)</code> |
| </p> |
| </dd> |
| <dt><em>Arguments</em>:</dt> |
| <dd><table> |
| <tr><td width="15%"><var>UNIT</var></td><td width="70%">Shall be a scalar <code>INTEGER</code>.</td></tr> |
| </table> |
| |
| </dd> |
| <dt><em>Return value</em>:</dt> |
| <dd><p>Returns <code>.TRUE.</code> if the <var>UNIT</var> is connected to a terminal |
| device, <code>.FALSE.</code> otherwise. |
| </p> |
| </dd> |
| <dt><em>Example</em>:</dt> |
| <dd><div class="smallexample"> |
| <pre class="smallexample">PROGRAM test_isatty |
| INTEGER(kind=1) :: unit |
| DO unit = 1, 10 |
| write(*,*) isatty(unit=unit) |
| END DO |
| END PROGRAM |
| </pre></div> |
| </dd> |
| <dt><em>See also</em>:</dt> |
| <dd><p><a href="TTYNAM.html#TTYNAM">TTYNAM</a> |
| </p></dd> |
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