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| <a name="GETENV-_002d_002d_002d-Get-an-environmental-variable"></a> |
| <h3 class="section">8.102 <code>GETENV</code> — Get an environmental variable</h3> |
| <a name="index-GETENV"></a> |
| <a name="index-environment-variable-2"></a> |
| |
| <dl compact="compact"> |
| <dt><em>Description</em>:</dt> |
| <dd><p>Get the <var>VALUE</var> of the environmental variable <var>NAME</var>. |
| </p> |
| <p>This intrinsic routine is provided for backwards compatibility with |
| GNU Fortran 77. In new code, programmers should consider the use of |
| the <a href="GET_005fENVIRONMENT_005fVARIABLE.html#GET_005fENVIRONMENT_005fVARIABLE">GET_ENVIRONMENT_VARIABLE</a> intrinsic defined by the Fortran |
| 2003 standard. |
| </p> |
| <p>Note that <code>GETENV</code> need not be thread-safe. It is the |
| responsibility of the user to ensure that the environment is not being |
| updated concurrently with a call to the <code>GETENV</code> intrinsic. |
| </p> |
| </dd> |
| <dt><em>Standard</em>:</dt> |
| <dd><p>GNU extension |
| </p> |
| </dd> |
| <dt><em>Class</em>:</dt> |
| <dd><p>Subroutine |
| </p> |
| </dd> |
| <dt><em>Syntax</em>:</dt> |
| <dd><p><code>CALL GETENV(NAME, VALUE)</code> |
| </p> |
| </dd> |
| <dt><em>Arguments</em>:</dt> |
| <dd><table> |
| <tr><td width="15%"><var>NAME</var></td><td width="70%">Shall be of type <code>CHARACTER</code> and of default kind.</td></tr> |
| <tr><td width="15%"><var>VALUE</var></td><td width="70%">Shall be of type <code>CHARACTER</code> and of default kind.</td></tr> |
| </table> |
| |
| </dd> |
| <dt><em>Return value</em>:</dt> |
| <dd><p>Stores the value of <var>NAME</var> in <var>VALUE</var>. If <var>VALUE</var> is |
| not large enough to hold the data, it is truncated. If <var>NAME</var> |
| is not set, <var>VALUE</var> will be filled with blanks. |
| </p> |
| </dd> |
| <dt><em>Example</em>:</dt> |
| <dd><div class="smallexample"> |
| <pre class="smallexample">PROGRAM test_getenv |
| CHARACTER(len=255) :: homedir |
| CALL getenv("HOME", homedir) |
| WRITE (*,*) TRIM(homedir) |
| END PROGRAM |
| </pre></div> |
| |
| </dd> |
| <dt><em>See also</em>:</dt> |
| <dd><p><a href="GET_005fENVIRONMENT_005fVARIABLE.html#GET_005fENVIRONMENT_005fVARIABLE">GET_ENVIRONMENT_VARIABLE</a> |
| </p></dd> |
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