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<h3 class="section">8.4 <code>ACCESS</code> — Checks file access modes</h3>
<p><a name="index-ACCESS-357"></a><a name="index-file-system_002c-access-mode-358"></a>
<dl>
<dt><em>Description</em>:<dd><code>ACCESS(NAME, MODE)</code> checks whether the file <var>NAME</var>
exists, is readable, writable or executable. Except for the
executable check, <code>ACCESS</code> can be replaced by
Fortran 95's <code>INQUIRE</code>.
<br><dt><em>Standard</em>:<dd>GNU extension
<br><dt><em>Class</em>:<dd>Inquiry function
<br><dt><em>Syntax</em>:<dd><code>RESULT = ACCESS(NAME, MODE)</code>
<br><dt><em>Arguments</em>:<dd>
<p><table summary=""><tr align="left"><td valign="top" width="15%"><var>NAME</var> </td><td valign="top" width="70%">Scalar <code>CHARACTER</code> of default kind with the
file name. Tailing blank 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 file name.
<br></td></tr><tr align="left"><td valign="top" width="15%"><var>MODE</var> </td><td valign="top" width="70%">Scalar <code>CHARACTER</code> of default kind with the
file access mode, may be any concatenation of <code>"r"</code> (readable),
<code>"w"</code> (writable) and <code>"x"</code> (executable), or <code>" "</code> to check
for existence.
<br></td></tr></table>
<br><dt><em>Return value</em>:<dd>Returns a scalar <code>INTEGER</code>, which is <code>0</code> if the file is
accessible in the given mode; otherwise or if an invalid argument
has been given for <code>MODE</code> the value <code>1</code> is returned.
<br><dt><em>Example</em>:<dd>
<pre class="smallexample"> program access_test
implicit none
character(len=*), parameter :: file = 'test.dat'
character(len=*), parameter :: file2 = 'test.dat '//achar(0)
if(access(file,' ') == 0) print *, trim(file),' is exists'
if(access(file,'r') == 0) print *, trim(file),' is readable'
if(access(file,'w') == 0) print *, trim(file),' is writable'
if(access(file,'x') == 0) print *, trim(file),' is executable'
if(access(file2,'rwx') == 0) &
print *, trim(file2),' is readable, writable and executable'
end program access_test
</pre>
<br><dt><em>Specific names</em>:<br><dt><em>See also</em>:<dd>
</dl>
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