Sophie: php-manual-en-4.3.0-2mdk noarch

php-manual-en-4.3.0-2mdk.noarch.rpm

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><H1
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>dio_fcntl</H1
><DIV
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><P
>    (PHP 4 &#62;= 4.2.0)</P
>dio_fcntl&nbsp;--&nbsp;Performs a c library fcntl on fd</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN19609"
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><H2
>Description</H2
>mixed <B
CLASS="methodname"
>dio_fcntl</B
> ( resource fd, int cmd [, mixed arg])<BR
></BR
><P
>&#13;     The <B
CLASS="function"
>dio_fcntl()</B
> function performs the
     operation specified by <TT
CLASS="parameter"
><I
>cmd</I
></TT
> on the file
     descriptor <TT
CLASS="parameter"
><I
>fd</I
></TT
>. Some commands require
     additional arguments <TT
CLASS="parameter"
><I
>args</I
></TT
> to be supplied.
    </P
><P
>&#13;     <TT
CLASS="parameter"
><I
>arg</I
></TT
> is an associative array, when
     <TT
CLASS="parameter"
><I
>cmd</I
></TT
> is F_SETLK or F_SETLLW, with the
     following keys:
     <P
></P
><UL
><LI
><P
>&#13;        "start" - offset where lock begins
       </P
></LI
><LI
><P
>&#13;        "length" - size of locked area. zero means to end of file
       </P
></LI
><LI
><P
>&#13;        "wenth" - Where l_start is relative to: can be SEEK_SET,
        SEEK_END and SEEK_CUR
       </P
></LI
><LI
><P
>&#13;        "type" - type of lock: can be F_RDLCK (read lock), F_WRLCK
        (write lock) or F_UNLCK (unlock)
       </P
></LI
></UL
>
    </P
><P
>&#13;     <TT
CLASS="parameter"
><I
>cmd</I
></TT
> can be one of the following
     operations:
     <P
></P
><UL
><LI
><P
>&#13;        F_SETLK - Lock is set or cleared. If the lock
        is held by someone else <B
CLASS="function"
>dio_fcntl()</B
> returns
        -1.
       </P
></LI
><LI
><P
>&#13;        F_SETLKW - like F_SETLK, but in case the lock
        is held by someone else, <B
CLASS="function"
>dio_fcntl()</B
> waits
        until the lock is released.
       </P
></LI
><LI
><P
>&#13;        F_GETLK - <B
CLASS="function"
>dio_fcntl()</B
> returns an
        associative array (as described above) if someone else
        prevents lock. If there is no obstruction key "type" will set
        to F_UNLCK.
       </P
></LI
><LI
><P
>&#13;        F_DUPFD - finds the lowest numbered available file descriptor
        greater or equal than <TT
CLASS="parameter"
><I
>arg</I
></TT
> and returns
        them.
       </P
></LI
><LI
><P
>&#13;        F_SETFL - Sets the file descriptors flags to the value specified by  
	<TT
CLASS="parameter"
><I
>arg</I
></TT
>, Which can be O_APPEND,O_NONBLOCK or 
	O_ASYNC . To use O_ASYNC you will need to use the pcntl extension.
       </P
></LI
></UL
>
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