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<h3 class="section">8.234 <code>SYSTEM</code> — Execute a shell command</h3>
<p><a name="index-SYSTEM-1052"></a><a name="index-system_002c-system-call-1053"></a>
<dl>
<dt><em>Description</em>:<dd>Passes the command <var>COMMAND</var> to a shell (see <code>system(3)</code>). If
argument <var>STATUS</var> is present, it contains the value returned by
<code>system(3)</code>, which is presumably 0 if the shell command succeeded.
Note that which shell is used to invoke the command is system-dependent
and environment-dependent.
<p>This intrinsic is provided in both subroutine and function forms;
however, only one form can be used in any given program unit.
<p>Note that the <code>system</code> function need not be thread-safe. It is
the responsibility of the user to ensure that <code>system</code> is not
called concurrently.
<br><dt><em>Standard</em>:<dd>GNU extension
<br><dt><em>Class</em>:<dd>Subroutine, function
<br><dt><em>Syntax</em>:<dd>
<p><table summary=""><tr align="left"><td valign="top" width="80%"><code>CALL SYSTEM(COMMAND [, STATUS])</code>
<br></td></tr><tr align="left"><td valign="top" width="80%"><code>STATUS = SYSTEM(COMMAND)</code>
<br></td></tr></table>
<br><dt><em>Arguments</em>:<dd>
<p><table summary=""><tr align="left"><td valign="top" width="15%"><var>COMMAND</var> </td><td valign="top" width="70%">Shall be of default <code>CHARACTER</code> type.
<br></td></tr><tr align="left"><td valign="top" width="15%"><var>STATUS</var> </td><td valign="top" width="70%">(Optional) Shall be of default <code>INTEGER</code> type.
<br></td></tr></table>
<br><dt><em>See also</em>:<dd><a href="EXECUTE_005fCOMMAND_005fLINE.html#EXECUTE_005fCOMMAND_005fLINE">EXECUTE_COMMAND_LINE</a>, which is part of the Fortran 2008 standard
and should considered in new code for future portability.
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