fileperms.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- splitted from ./it/functions/filesystem.xml, last change in rev 1.15 -->
<!-- EN-Revision: n/a Maintainer: fernando Status: working -->
<!-- CREDITS: cortesi -->  
<refentry xml:id="function.fileperms" xmlns="http://docbook.org/ns/docbook">
   <refnamediv>
    <refname>fileperms</refname>
    <refpurpose>Restituisce i permessi sui file</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Descrizione</title>
     <methodsynopsis>
      <type>int</type><methodname>fileperms</methodname>
      <methodparam><type>string</type><parameter>filename</parameter></methodparam>
     </methodsynopsis>
    <para>    
     Restituisce i permessi sui file, or &false; in caso di errore.
    </para>
    &note.clearstatcache;
    &tip.fopen-wrapper.stat;
    <example>
        <title>Mostra i permessi in valore ottale</title>
        <programlisting role="php">
<![CDATA[
<?php
echo substr(sprintf('%o', fileperms('/tmp')), -4);
echo substr(sprintf('%o', fileperms('/etc/passwd')), -4);
?>
]]>
        </programlisting>
        <para>Ciò produrrà il seguente output:</para>
        <screen>
<![CDATA[
1777
0644
]]>
        </screen>
    </example>
    <example>
        <title>Mostra gli interi permessi</title>
        <programlisting role="php">
<![CDATA[
<?php
$perms = fileperms('/etc/passwd');

if (($perms & 0xC000) == 0xC000) {
    // Socket
    $info = 's';
} elseif (($perms & 0xA000) == 0xA000) {
    // Symbolic Link
    $info = 'l';
} elseif (($perms & 0x8000) == 0x8000) {
    // Regular
    $info = '-';
} elseif (($perms & 0x6000) == 0x6000) {
    // Block special
    $info = 'b';
} elseif (($perms & 0x4000) == 0x4000) {
    // Directory
    $info = 'd';
} elseif (($perms & 0x2000) == 0x2000) {
    // Character special
    $info = 'c';
} elseif (($perms & 0x1000) == 0x1000) {
    // FIFO pipe
    $info = 'p';
} else {
    // Unknown
    $info = 'u';
}

// Owner
$info .= (($perms & 0x0100) ? 'r' : '-');
$info .= (($perms & 0x0080) ? 'w' : '-');
$info .= (($perms & 0x0040) ?
            (($perms & 0x0800) ? 's' : 'x' ) :
            (($perms & 0x0800) ? 'S' : '-'));

// Group
$info .= (($perms & 0x0020) ? 'r' : '-');
$info .= (($perms & 0x0010) ? 'w' : '-');
$info .= (($perms & 0x0008) ?
            (($perms & 0x0400) ? 's' : 'x' ) :
            (($perms & 0x0400) ? 'S' : '-'));

// World
$info .= (($perms & 0x0004) ? 'r' : '-');
$info .= (($perms & 0x0002) ? 'w' : '-');
$info .= (($perms & 0x0001) ?
            (($perms & 0x0200) ? 't' : 'x' ) :
            (($perms & 0x0200) ? 'T' : '-'));

echo $info;
?>
]]>
        </programlisting>
        <para>Ciò produrrà il seguente output:</para>
        <screen>
<![CDATA[
-r--r--r--
]]>
        </screen>
    </example>
    <simpara>
     Vedi anche <function>is_readable</function>,
     e <function>stat</function>
    </simpara>
   </refsect1>
  </refentry>

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