huangmeng
/
Embedded_AI


			
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154
							<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<!-- Copyright (C) 1999-2017 Free Software Foundation, Inc.

Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with the
Invariant Sections being "Funding Free Software", the Front-Cover
Texts being (a) (see below), and with the Back-Cover Texts being (b)
(see below).  A copy of the license is included in the section entitled
"GNU Free Documentation License".

(a) The FSF's Front-Cover Text is:

A GNU Manual

(b) The FSF's Back-Cover Text is:

You have freedom to copy and modify this GNU Manual, like GNU
     software.  Copies published by the Free Software Foundation raise
     funds for GNU development. -->
<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
<head>
<title>The GNU Fortran Compiler: CHMOD</title>

<meta name="description" content="The GNU Fortran Compiler: CHMOD">
<meta name="keywords" content="The GNU Fortran Compiler: CHMOD">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<link href="index.html#Top" rel="start" title="Top">
<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
<link href="Intrinsic-Procedures.html#Intrinsic-Procedures" rel="up" title="Intrinsic Procedures">
<link href="CMPLX.html#CMPLX" rel="next" title="CMPLX">
<link href="CHDIR.html#CHDIR" rel="prev" title="CHDIR">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.smallquotation {font-size: smaller}
div.display {margin-left: 3.2em}
div.example {margin-left: 3.2em}
div.indentedblock {margin-left: 3.2em}
div.lisp {margin-left: 3.2em}
div.smalldisplay {margin-left: 3.2em}
div.smallexample {margin-left: 3.2em}
div.smallindentedblock {margin-left: 3.2em; font-size: smaller}
div.smalllisp {margin-left: 3.2em}
kbd {font-style:oblique}
pre.display {font-family: inherit}
pre.format {font-family: inherit}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
pre.smalldisplay {font-family: inherit; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: inherit; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.nocodebreak {white-space:nowrap}
span.nolinebreak {white-space:nowrap}
span.roman {font-family:serif; font-weight:normal}
span.sansserif {font-family:sans-serif; font-weight:normal}
ul.no-bullet {list-style: none}
-->
</style>


</head>

<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
<a name="CHMOD"></a>
<div class="header">
<p>
Next: <a href="CMPLX.html#CMPLX" accesskey="n" rel="next">CMPLX</a>, Previous: <a href="CHDIR.html#CHDIR" accesskey="p" rel="prev">CHDIR</a>, Up: <a href="Intrinsic-Procedures.html#Intrinsic-Procedures" accesskey="u" rel="up">Intrinsic Procedures</a> &nbsp; [<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>
</div>
<hr>
<a name="CHMOD-_002d_002d_002d-Change-access-permissions-of-files"></a>
<h3 class="section">9.61 <code>CHMOD</code> &mdash; Change access permissions of files</h3>
<a name="index-CHMOD"></a>
<a name="index-file-system_002c-change-access-mode"></a>

<dl compact="compact">
<dt><em>Description</em>:</dt>
<dd><p><code>CHMOD</code> changes the permissions of a file.
</p>
<p>This intrinsic is provided in both subroutine and function forms; however,
only one form can be used in any given program unit.
</p>
</dd>
<dt><em>Standard</em>:</dt>
<dd><p>GNU extension
</p>
</dd>
<dt><em>Class</em>:</dt>
<dd><p>Subroutine, function
</p>
</dd>
<dt><em>Syntax</em>:</dt>
<dd><table>
<tr><td width="80%"><code>CALL CHMOD(NAME, MODE[, STATUS])</code></td></tr>
<tr><td width="80%"><code>STATUS = CHMOD(NAME, MODE)</code></td></tr>
</table>

</dd>
<dt><em>Arguments</em>:</dt>
<dd><table>
<tr><td width="15%"><var>NAME</var></td><td width="70%">Scalar <code>CHARACTER</code> of default kind with the
file name. Trailing blanks are ignored unless the character
<code>achar(0)</code> is present, then all characters up to and excluding
<code>achar(0)</code> are used as the file name.</td></tr>
<tr><td width="15%"><var>MODE</var></td><td width="70%">Scalar <code>CHARACTER</code> of default kind giving the
file permission. <var>MODE</var> uses the same syntax as the <code>chmod</code> utility
as defined by the POSIX standard. The argument shall either be a string of
a nonnegative octal number or a symbolic mode.</td></tr>
<tr><td width="15%"><var>STATUS</var></td><td width="70%">(optional) scalar <code>INTEGER</code>, which is
<code>0</code> on success and nonzero otherwise.</td></tr>
</table>

</dd>
<dt><em>Return value</em>:</dt>
<dd><p>In either syntax, <var>STATUS</var> is set to <code>0</code> on success and nonzero
otherwise.
</p>
</dd>
<dt><em>Example</em>:</dt>
<dd><p><code>CHMOD</code> as subroutine
</p><div class="smallexample">
<pre class="smallexample">program chmod_test
  implicit none
  integer :: status
  call chmod('test.dat','u+x',status)
  print *, 'Status: ', status
end program chmod_test
</pre></div>
<p><code>CHMOD</code> as function:
</p><div class="smallexample">
<pre class="smallexample">program chmod_test
  implicit none
  integer :: status
  status = chmod('test.dat','u+x')
  print *, 'Status: ', status
end program chmod_test
</pre></div>

</dd>
</dl>


</body>
</html>