133 lines
5.2 KiB
HTML
133 lines
5.2 KiB
HTML
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<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>The GNU Fortran Compiler: SYSTEM</title>
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<meta name="description" content="The GNU Fortran Compiler: SYSTEM">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Intrinsic-Procedures.html#Intrinsic-Procedures" rel="up" title="Intrinsic Procedures">
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<link href="SYSTEM_005fCLOCK.html#SYSTEM_005fCLOCK" rel="next" title="SYSTEM_CLOCK">
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<link href="SYMLNK.html#SYMLNK" rel="prev" title="SYMLNK">
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<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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<a name="SYSTEM"></a>
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<div class="header">
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<p>
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Next: <a href="SYSTEM_005fCLOCK.html#SYSTEM_005fCLOCK" accesskey="n" rel="next">SYSTEM_CLOCK</a>, Previous: <a href="SYMLNK.html#SYMLNK" accesskey="p" rel="prev">SYMLNK</a>, Up: <a href="Intrinsic-Procedures.html#Intrinsic-Procedures" accesskey="u" rel="up">Intrinsic Procedures</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="SYSTEM-_002d_002d_002d-Execute-a-shell-command"></a>
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<h3 class="section">9.253 <code>SYSTEM</code> — Execute a shell command</h3>
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<a name="index-SYSTEM"></a>
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<a name="index-system_002c-system-call-1"></a>
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<dl compact="compact">
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<dt><em>Description</em>:</dt>
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<dd><p>Passes the command <var>COMMAND</var> to a shell (see <code>system(3)</code>). If
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argument <var>STATUS</var> is present, it contains the value returned by
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<code>system(3)</code>, which is presumably 0 if the shell command succeeded.
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Note that which shell is used to invoke the command is system-dependent
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and environment-dependent.
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</p>
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<p>This intrinsic is provided in both subroutine and function forms;
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however, only one form can be used in any given program unit.
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</p>
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<p>Note that the <code>system</code> function need not be thread-safe. It is
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the responsibility of the user to ensure that <code>system</code> is not
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called concurrently.
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</p>
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</dd>
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<dt><em>Standard</em>:</dt>
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<dd><p>GNU extension
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</p>
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</dd>
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<dt><em>Class</em>:</dt>
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<dd><p>Subroutine, function
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</p>
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</dd>
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<dt><em>Syntax</em>:</dt>
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<dd><table>
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<tr><td width="80%"><code>CALL SYSTEM(COMMAND [, STATUS])</code></td></tr>
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<tr><td width="80%"><code>STATUS = SYSTEM(COMMAND)</code></td></tr>
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</table>
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</dd>
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<dt><em>Arguments</em>:</dt>
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<dd><table>
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<tr><td width="15%"><var>COMMAND</var></td><td width="70%">Shall be of default <code>CHARACTER</code> type.</td></tr>
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<tr><td width="15%"><var>STATUS</var></td><td width="70%">(Optional) Shall be of default <code>INTEGER</code> type.</td></tr>
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</table>
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</dd>
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<dt><em>See also</em>:</dt>
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<dd><p><a href="EXECUTE_005fCOMMAND_005fLINE.html#EXECUTE_005fCOMMAND_005fLINE">EXECUTE_COMMAND_LINE</a>, which is part of the Fortran 2008 standard
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and should considered in new code for future portability.
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</p></dd>
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</dl>
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</body>
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</html>
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