1041 lines
29 KiB
HTML
1041 lines
29 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta name="Copyright" content="Copyright (c) 2006 by IBM Corporation">
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<title>ioctl()--Perform I/O Control Request</title>
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<!-- Begin Header Records ========================================= -->
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<!-- Change History: -->
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<!-- YYMMDD USERID Change description -->
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<!-- file cleaned -->
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<!-- Unix2 SCRIPT J converted by B2H R4.1 (346) (CMS) by V2KEA304 -->
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<!-- at RCHVMW2 on 17 Feb 1999 at 11:05:09 -->
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<!-- Change History: -->
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<!-- 010703 JTROUS Add ERESTART, EINTR, V5R2, DCR 98686 -->
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<!-- 011022 JTROUS Changes from API Review 1, V5R2 -->
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<!-- IFS and Sockets versions merged for V5R2 -->
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<!-- Edited by Kersten Feb 02 -->
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<!-- 0206?? JET This file has undergone html cleanup -->
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<!-- 020618 EMIG: updated for NFS threadsafety, V5R3 -->
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<!-- 020718 MFENLON: updated for QFileSvr.400 threadsafety, V5R3 -->
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<!-- 050329 JTROUS: fix enums, no change flag, V5R4 -->
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<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
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</head>
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<body>
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<!-- End Header Records -->
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<!-- Java sync-link -->
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<script type="text/javascript" language="Javascript" src="../rzahg/synch.js">
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</script>
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<a name="Top_Of_Page"></a>
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<h2>ioctl()--Perform I/O Control Request</h2>
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<div class="box" style="width: 70%;">
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<br>
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Syntax<br>
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<pre>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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int ioctl(int <em>descriptor</em>,
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unsigned long <em>request</em>,
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...);
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</pre>
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<br>
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Service Program Name: QP0LLIB1<br>
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<!-- iddvc RMBR -->
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<br>
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Default Public Authority: *USE<br>
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<!-- iddvc RMBR -->
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<br>
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Threadsafe: Conditional; see <a href="#unotes">Usage
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Notes</a>. <br>
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<!-- iddvc RMBR -->
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<br>
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</div>
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<p>The <strong>ioctl()</strong> function performs control functions (requests)
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on a descriptor.</p>
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<br>
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<h3>Parameters</h3>
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<dl>
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<dt><strong>descriptor</strong></dt>
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<dd>(Input) The descriptor on which the control request is to be performed.<br>
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<br>
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</dd>
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<dt><strong>request</strong></dt>
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<dd>(Input) The request that is to be performed on the <em>descriptor</em>.<br>
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<br>
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</dd>
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<dt><strong>...</strong></dt>
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<dd>(Input) A variable number of optional parameters that are dependent on the
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request.</dd>
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</dl>
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<p>The <em>ioctl()</em> requests that are supported are:</p>
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<table cellpadding="5">
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<!-- cols="20 80" -->
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<tr>
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<td align="left" valign="top"><em>FIOASYNC</em></td>
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<td align="left" valign="top">Set or clear the flag that allows the receipt of
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asynchronous I/O signals (<samp>SIGIO</samp>).
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<p>The third parameter represents a pointer to an integer flag. A nonzero value
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sets the socket to generate <samp>SIGIO</samp> signals, while a zero value sets
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the socket to not generate <samp>SIGIO</samp> signals. Note that before the
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<samp>SIGIO</samp> signals can be delivered, you must use either the <samp>
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FIOSETOWN</samp> or <samp>SIOCSPGRP</samp> <em>ioctl()</em> request, or the
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<samp>F_SETOWN</samp> <em>fcntl()</em> command to set a process ID or a process
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group ID to indicate what process or group of processes will receive the
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signal. Once conditioned to send <samp>SIGIO</samp> signals, a socket will
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generate <samp>SIGIO</samp> signals whenever certain significant conditions
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change on the socket. For example, <samp>SIGIO</samp> will be generated when
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normal data arrives on the socket, when out-of-band data arrives on the socket
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(in addition to the <samp>SIGURG</samp> signal), when an error occurs on the
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socket, or when end-of-file is received on the socket. It is also generated
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when a connection request is received on the socket (if it is a socket on which
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the <em>listen()</em> verb has been done). Also note that a socket can be set
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to generate the <samp>SIGIO</samp> signal by using the <em>fcntl()</em> command
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<samp>F_SETFL</samp> with a flag value specifying <samp>FASYNC</samp>.</p>
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</td>
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</tr>
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<tr>
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<td align="left" valign="top"><em>FIOCCSID</em></td>
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<td align="left" valign="top">Return the coded character set ID (CCSID)
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associated with the open instance represented by the descriptor and the CCSID
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associated with the object. The third parameter represents a pointer to the
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structure Qp0lFIOCCSID, which is defined in <sys/ioctl.h>. This
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information may be necessary to correctly manipulate data read from or written
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to a file opened in another process.
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<p>If the open instance represented by the descriptor is in binary mode (the
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open() did not specify the O_TEXTDATA open flag), the open instance CCSID
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returned is equal to the object CCSID returned.</p>
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</td>
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</tr>
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<tr>
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<td align="left" valign="top"><a name="fiogetown"><em>FIOGETOWN</em></a></td>
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<td align="left" valign="top">Get the process ID or process group ID that is to
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receive the <samp>SIGIO</samp> and <samp>SIGURG</samp> signals.
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<p>The third parameter represents a pointer to a signed integer that will
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contain the process ID or the process group ID to which the socket is currently
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sending asynchronous signals such as <samp>SIGURG</samp>. A process ID is
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returned as a positive integer, and a process group ID is specified as a
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negative integer. A 0 value returned indicates that no asynchronous signals can
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be generated by the socket. A positive or a negative value indicates that the
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socket has been set to generate <samp>SIGURG</samp> signals.</p>
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</td>
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</tr>
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<tr>
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<td align="left" valign="top"><em>FIONBIO</em></td>
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<td align="left" valign="top">Set or clear the nonblocking I/O flag (O_NONBLOCK
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oflag). The third parameter represents a pointer to an integer flag. A nonzero
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value sets the nonblocking I/O flag for the descriptor; a zero value clears the
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flag.<br>
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<br>
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</td>
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</tr>
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<tr>
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<td align="left" valign="top"><em>FIONREAD</em></td>
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<td align="left" valign="top">Return the number of bytes available to be read.
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The third parameter represents a pointer to an integer that is set to the
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number of bytes available to be read.<br>
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<br>
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</td>
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</tr>
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<tr>
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<td align="left" valign="top"><a name="fiosetown"><em>FIOSETOWN</em></a></td>
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<td align="left" valign="top">Set the process ID or process group ID that is to
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receive the <samp>SIGIO</samp> and <samp>SIGURG</samp> signals.
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<p>The third parameter represents a pointer to a signed integer that contains
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the process ID or the process group ID to which the socket should send
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asynchronous signals such as <samp>SIGURG</samp>. A process ID is specified as
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a positive integer, and a process group ID is specified as a negative integer.
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Specifying a 0 value resets the socket such that no asynchronous signals are
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delivered. Specifying a process ID or a process group ID requests that sockets
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begin sending the <samp>SIGURG</samp> signal to the specified ID when
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out-of-band data arrives on the socket.</p>
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</td>
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</tr>
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<tr>
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<td align="left" valign="top"><a name="siocaddrt"><em>SIOCADDRT</em></a></td>
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<td align="left" valign="top">Add an entry to the interface routing table.
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Valid for sockets with address family of <samp>AF_INET</samp>.
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<p>The third parameter represents a pointer to the structure <strong>
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rtentry</strong>, which is defined in <strong><net/route.h></strong>:</p>
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<pre>
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struct rtentry [
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struct sockaddr rt_dst;
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struct sockaddr rt_mask;
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struct sockaddr rt_gateway;
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int rt_mtu;
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u_short rt_flags;
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u_short rt_refcnt;
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u_char rt_protocol;
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u_char rt_TOS;
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char rt_if[IFNAMSIZ];
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];
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</pre>
|
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<p>The <em>rt_dst</em>, <em>rt_mask</em>, and <em>rt_gateway</em> fields are
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the route destination address, route address mask, and gateway address,
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respectively. <em>rt_mtu</em> is the maximum transfer unit associated with the
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route. <em>rt_flags</em> contains flags that give some information about a
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route (for example, whether the route was created dynamically, whether the
|
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route is usable, type of route, and so on). <em>rt_refcnt</em> indicates the
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number of references that exist to the route entry. <em>rt_protocol</em>
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indicates how the route entry was generated (for example, configuration, ICMP
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redirect, and so on). <em>rt_tos</em> is the type of service associated with
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the route. <em>rt_if</em> is a NULL-terminated string that represents the
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interface IP address in dotted decimal format that is associated with the
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route.</p>
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<p>To add a route, the following fields must be set:</p>
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<ul>
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<li><em>rt_dst</em></li>
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<li><em>rt_mask</em></li>
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<li><em>rt_gateway</em></li>
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<li><em>rt_tos</em></li>
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<li><em>rt_protocol</em></li>
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<li><em>rt_mtu</em> (Setting the <em>rt_mtu</em> value to zero essentially
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means use the MTU from the associated line description used when the route is
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bound to an IFC.)</li>
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<li><em>rt_if</em> (<em>rt_if</em> can be set to the dotted decimal equivalent
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of <samp>INADDR_ANY</samp>, which is 0.)</li>
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</ul>
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<p>In addition, the <em>rt_flags</em> bit flags can be set to the
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following:</p>
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<ul>
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<li>RTF_NOREBIND_IFC_FAIL if no rebinding of the route is to occur when the
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interface associated with the route fails.</li>
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<li>RTF_NOREBIND_IFC_ACTV if no rebinding is to occur when interfaces are
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activated or deactivated.</li>
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</ul>
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<p>To delete a route, the following fields must be set:</p>
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<ul>
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<li><em>rt_dst</em></li>
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<li><em>rt_mask</em></li>
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<li><em>rt_gateway</em></li>
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<li><em>rt_tos</em></li>
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<li><em>rt_protocol</em></li>
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</ul>
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<p>All other fields are ignored when adding or removing an entry.</p>
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</td>
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</tr>
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<tr>
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<td align="left" valign="top"><em>SIOCATMARK</em></td>
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<td align="left" valign="top">Return the value indicating whether socket's read
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pointer is currently at the out-of-band mark.
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<p>The third parameter represents a pointer to an integer flag. If the socket's
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read pointer is currently at the out-of-band mark, the flag is set to a nonzero
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value. If it is not, the flag is set to zero.</p>
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</td>
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</tr>
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|
|
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<tr>
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<td align="left" valign="top"><em>SIOCDELRT</em></td>
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<td align="left" valign="top">Delete an entry from the interface routing table.
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Valid for sockets with address family of <samp>AF_INET</samp>.
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<p>See <a href="#siocaddrt"><em>SIOCADDRT</em></a> for more information on the
|
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third parameter.</p>
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||
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</td>
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</tr>
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||
|
|
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<tr>
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<td align="left" valign="top"><a name="siocgifaddr"><em>
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SIOCGIFADDR</em></a></td>
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||
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<td align="left" valign="top">Get the interface address. Valid for sockets with
|
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address family of <samp>AF_INET</samp>.
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||
|
|
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||
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<p>The third parameter represents a pointer to the structure <strong>
|
||
|
|
ifreq</strong>, defined in <strong><net/if.h></strong>:</p>
|
||
|
|
|
||
|
|
<pre>
|
||
|
|
struct ifreq {
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||
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|
char ifr_name[IFNAMSIZE];
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||
|
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union {
|
||
|
|
struct sockaddr ifru_addr;
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||
|
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struct sockaddr ifru_mask;
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||
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|
struct sockaddr ifru_broadaddr;
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||
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short ifru_flags;
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int ifru_mtu;
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int infu_rbufsize;
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||
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char ifru_linename[10];
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char ifru_TOS;
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} ifr_ifru;
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||
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};
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||
|
|
</pre>
|
||
|
|
|
||
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|
<p><em>ifr_name</em> is the name of the interface for which information is to
|
||
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be retrieved. The i5/OS implementation requires this field to be set to a
|
||
|
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NULL-terminated string that represents the interface IP address in dotted
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decimal format. Depending on the request, one of the fields in the <em>
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ifr_ifru</em> union will be set upon return from the <em>ioctl()</em> call.
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||
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<em>ifru_addr</em> is the local IP address of the interface. <em>ifru_mask</em>
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is the subnetwork mask associated with the interface. <em>ifru_broadaddr</em>
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||
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is the broadcast address. <em>ifru_flags</em> contains flags that give some
|
||
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information about an interface (for example, token-ring routing support,
|
||
|
|
whether interface is active, broadcast address, and so on). <em>ifru_mtu</em>
|
||
|
|
is the maximum transfer unit configured for the interface. <em>
|
||
|
|
ifru_rbufsize</em> is the reassembly buffer size of the interface. <em>
|
||
|
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ifru_linename</em> is the line name associated with the interface. <em>
|
||
|
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ifru_TOS</em> is the type of service configured for the interface.</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>SIOCGIFBRDADDR</em></td>
|
||
|
|
<td align="left" valign="top">Get the interface broadcast address. Valid for
|
||
|
|
sockets with address family of <samp>AF_INET</samp>.
|
||
|
|
|
||
|
|
<p>See <a href="#siocgifaddr"><em>SIOCGIFADDR</em></a> for more information on
|
||
|
|
the third parameter.</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>SIOCGIFCONF</em></td>
|
||
|
|
<td align="left" valign="top">Get the interface configuration list. Valid for
|
||
|
|
sockets with address family of <samp>AF_INET</samp>.
|
||
|
|
|
||
|
|
<p>The third parameter represents a pointer to the structure <strong>
|
||
|
|
ifconf</strong>, defined in <strong><net/if.h></strong>:</p>
|
||
|
|
|
||
|
|
<pre>
|
||
|
|
struct ifconf [
|
||
|
|
int ifc_len;
|
||
|
|
int ifc_configured;
|
||
|
|
int ifc_returned;
|
||
|
|
union {
|
||
|
|
caddr_t ifcu_buf;
|
||
|
|
struct ifreq *ifcu_req;
|
||
|
|
} ifc_ifcu;
|
||
|
|
];
|
||
|
|
</pre>
|
||
|
|
|
||
|
|
<p><em>ifc_len</em> is a value-result field. The caller passes the size of the
|
||
|
|
buffer pointed to by <em>ifcu_buf</em>. On return, <em>ifc_len</em> contains
|
||
|
|
the amount of storage that was used in the buffer pointed to by <em>
|
||
|
|
ifcu_buf</em> for the interface entries. <em>ifc_configured</em> is the number
|
||
|
|
of interface entries in the interface list. <em>ifc_returned</em> is the number
|
||
|
|
of interface entries that were returned (this is dependent on the size of the
|
||
|
|
buffer pointed to by <em>ifcu_buf</em>). <em>ifcu_buf</em> is the user buffer
|
||
|
|
in which a list of interface entries will be stored. Each stored entry will be
|
||
|
|
an <em>ifreq</em> structure.</p>
|
||
|
|
|
||
|
|
<p>To get the interface configuration list, the following fields must be
|
||
|
|
set:</p>
|
||
|
|
|
||
|
|
<ul>
|
||
|
|
<li><em>ifc_len</em></li>
|
||
|
|
|
||
|
|
<li><em>ifcu_buf</em><br>
|
||
|
|
<br>
|
||
|
|
</li>
|
||
|
|
</ul>
|
||
|
|
|
||
|
|
<p>See <a href="#siocgifaddr">SIOCGIFADDR</a> for more information on the list
|
||
|
|
of <em>ifreq</em> structures returned. For this request, the <em>ifr_name</em>
|
||
|
|
and <em>ifru_addr</em> fields will be set to a value.</p>
|
||
|
|
|
||
|
|
<p><strong>Note:</strong> Additional information about each individual
|
||
|
|
interface can be obtained using these values and the other interface-related
|
||
|
|
requests.</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>SIOCGIFFLAGS</em></td>
|
||
|
|
<td align="left" valign="top">Get interface flags. Valid for sockets with
|
||
|
|
address family of <samp>AF_INET</samp>.
|
||
|
|
|
||
|
|
<p>See <a href="#siocgifaddr"><em>SIOCGIFADDR</em></a> for more information on
|
||
|
|
the third parameter.</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>SIOCGIFLIND</em></td>
|
||
|
|
<td align="left" valign="top">Get the interface line description name. Valid
|
||
|
|
for sockets with address family of <samp>AF_INET</samp>.
|
||
|
|
|
||
|
|
<p>See <a href="#siocgifaddr"><em>SIOCGIFADDR</em></a> for more information on
|
||
|
|
the third parameter.</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>SIOCGIFMTU</em></td>
|
||
|
|
<td align="left" valign="top">Get the interface network MTU. Valid for sockets
|
||
|
|
with address family of <samp>AF_INET</samp>.
|
||
|
|
|
||
|
|
<p>See <a href="#siocgifaddr"><em>SIOCGIFADDR</em></a> for more information on
|
||
|
|
the third parameter.</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>SIOCGIFNETMASK</em></td>
|
||
|
|
<td align="left" valign="top">Get the mask for the network portion of the
|
||
|
|
interface address. Valid for sockets with address family of <samp>
|
||
|
|
AF_INET</samp>.
|
||
|
|
|
||
|
|
<p>See <a href="#siocgifaddr"><em>SIOCGIFADDR</em></a> for more information on
|
||
|
|
the third parameter.</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>SIOCGIFRBUFS</em></td>
|
||
|
|
<td align="left" valign="top">Get the interface reassembly buffer size. Valid
|
||
|
|
for sockets with address family of <samp>AF_INET</samp>.
|
||
|
|
|
||
|
|
<p>See <a href="#siocgifaddr"><em>SIOCGIFADDR</em></a> for more information on
|
||
|
|
the third parameter.</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>SIOCGIFTOS</em></td>
|
||
|
|
<td align="left" valign="top">Get the interface type-of-service (TOS). Valid
|
||
|
|
for sockets with address family of <samp>AF_INET</samp>.
|
||
|
|
|
||
|
|
<p>See <a href="#siocgifaddr"><em>SIOCGIFADDR</em></a> for more information on
|
||
|
|
the third parameter.</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>SIOCGPGRP</em></td>
|
||
|
|
<td align="left" valign="top">Get the process ID or process group ID that is to
|
||
|
|
receive the <samp>SIGIO</samp> and <samp>SIGURG</samp> signals.
|
||
|
|
|
||
|
|
<p>See <a href="#fiogetown"><em>FIOGETOWN</em></a> for more information on the
|
||
|
|
third parameter.</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>SIOCGRTCONF</em></td>
|
||
|
|
<td align="left" valign="top">Get the route configuration list. Valid for
|
||
|
|
sockets with address family of <samp>AF_INET</samp>.
|
||
|
|
|
||
|
|
<p>For the <samp>SIOCGRTCONF</samp> request, the third parameter represents a
|
||
|
|
pointer to the structure <strong>rtconf</strong>, also defined in <strong>
|
||
|
|
<net/route.h></strong>:</p>
|
||
|
|
|
||
|
|
<pre>
|
||
|
|
struct rtconf [
|
||
|
|
int rtc_len;
|
||
|
|
int rtc_configured;
|
||
|
|
int rtc_returned;
|
||
|
|
union {
|
||
|
|
caddr_t rtcu_buf;
|
||
|
|
struct rtentry *rtcu_req;
|
||
|
|
} rtc_rtcu;
|
||
|
|
];
|
||
|
|
</pre>
|
||
|
|
|
||
|
|
<p><em>rtc_len</em> is a value-result field. The caller passes the size of the
|
||
|
|
buffer pointed to by <em>rtcu_buf</em>. On return, <em>rtc_len</em> contains
|
||
|
|
the amount of storage that was used in the buffer pointed to by <em>
|
||
|
|
rtcu_buf</em> for the route entries. <em>rtc_configured</em> is the number of
|
||
|
|
route entries in the route list. <em>rtc_returned</em> is the number of route
|
||
|
|
entries that were returned (this is dependent on the size of the buffer pointed
|
||
|
|
to by <em>rtcu_buf</em>). <em>rtcu_buf</em> is the user buffer in which a list
|
||
|
|
of route entries will be stored. Each stored entry will be an <em>rtentry</em>
|
||
|
|
structure.</p>
|
||
|
|
|
||
|
|
<p>To get the route configuration list, the following fields must be set:</p>
|
||
|
|
|
||
|
|
<ul>
|
||
|
|
<li><em>rtc_len</em></li>
|
||
|
|
|
||
|
|
<li><em>rtcu_buf</em><br>
|
||
|
|
<br>
|
||
|
|
</li>
|
||
|
|
</ul>
|
||
|
|
|
||
|
|
<p>See <a href="#siocaddrt">SIOCADDRT</a> for more information on the list of
|
||
|
|
<em>rtentry</em> structures returned. For this request, all fields in each <em>
|
||
|
|
rtentry</em> structure will be set to a value.</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>SIOCSENDQ</em></td>
|
||
|
|
<td align="left" valign="top">Return the number of bytes on the send queue that
|
||
|
|
have not been acknowledged by the remote system. Valid for sockets with address
|
||
|
|
family of <samp>AF_INET</samp> or <samp>AF_INET6</samp> and socket type of
|
||
|
|
<samp>SOCK_STREAM</samp>.
|
||
|
|
|
||
|
|
<p>The third parameter represents a pointer to an integer that is set to the
|
||
|
|
number of bytes yet to be acknowledged as being received by the remote TCP
|
||
|
|
transport driver.</p>
|
||
|
|
|
||
|
|
<p><strong>Notes:</strong></p>
|
||
|
|
|
||
|
|
<ol>
|
||
|
|
<li>SIOCSENDQ is used after a series of blocking or non-blocking send
|
||
|
|
operations to see if the sent data has reached the transport layer on the
|
||
|
|
remote system. Note that this does not not guarantee the data has reached the
|
||
|
|
remote application.<br>
|
||
|
|
<br>
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li>When SIOCSENDQ is used in a multithreaded application, the actions of other
|
||
|
|
threads must be considered by the application. SIOCSENDQ provides a result for
|
||
|
|
a socket descriptor at the given point in time when the <em>ioctl()</em>)
|
||
|
|
request is received by the TCP transport layer. Blocking send operations that
|
||
|
|
have not completed, as well as non-blocking send operations in other threads
|
||
|
|
issued after the SIOCSENDQ <em>ioctl()</em>, are not reflected in the result
|
||
|
|
obtained for the SIOCSENDQ <em>ioctl()</em>.<br>
|
||
|
|
<br>
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li>In a situation where the application has multiple threads sending data on
|
||
|
|
the same socket descriptor, the application should not assume that all data has
|
||
|
|
been received by the remote side when 0 is returned if the application is not
|
||
|
|
positive that all send operations in the other threads were complete at the
|
||
|
|
time the SIOCSENDQ <em>ioctl()</em> was issued. An application should issue the
|
||
|
|
SIOCSENDQ <em>ioctl()</em> only after it has completed all of the send
|
||
|
|
operations. No value is added by querying the machine to see if it has sent all
|
||
|
|
of the data when the application itself has not sent all of the data in a given
|
||
|
|
unit of work.</li>
|
||
|
|
</ol>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>SIOCSPGRP</em></td>
|
||
|
|
<td align="left" valign="top">Set the process ID or process group ID that is to
|
||
|
|
receive the <samp>SIGIO</samp> and <samp>SIGURG</samp> signals.
|
||
|
|
|
||
|
|
<p>See <a href="#fiosetown"><em>FIOSETOWN</em></a> for more information on the
|
||
|
|
third parameter.</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
|
||
|
|
|
||
|
|
<h3>Authorities</h3>
|
||
|
|
|
||
|
|
<p>No authorization is required.</p>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<h3>Return Value</h3>
|
||
|
|
|
||
|
|
<dl compact>
|
||
|
|
<dt><em>0</em></dt>
|
||
|
|
|
||
|
|
<dd><strong>ioctl()</strong> was successful</dd>
|
||
|
|
|
||
|
|
<dt><em>-1</em></dt>
|
||
|
|
|
||
|
|
<dd><strong>ioctl()</strong> was not successful. The <em>
|
||
|
|
errno</em> global variable is set to indicate the error.</dd>
|
||
|
|
</dl>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<h3>Error Conditions</h3>
|
||
|
|
|
||
|
|
<p>If <strong>ioctl()</strong> is not successful, <em>errno</em> usually
|
||
|
|
indicates one of the following errors. Under some conditions, <em>errno</em>
|
||
|
|
could indicate an error other than those listed here.</p>
|
||
|
|
|
||
|
|
<table cellpadding="5">
|
||
|
|
<!-- cols="25 75" -->
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<th align="left" valign="bottom">Error condition</th>
|
||
|
|
<th align="left" valign="bottom">Additional information</th>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#EACCES">EACCES</a>]</em></td>
|
||
|
|
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<p>If you are accessing a remote file through the Network File System, update
|
||
|
|
operations to file permissions at the server are not reflected at the client
|
||
|
|
until updates to data that is stored locally by the Network File System take
|
||
|
|
place. (Several options on the Add Mounted File System (ADDMFS) command
|
||
|
|
determine the time between refresh operations of local data.) Access to a
|
||
|
|
remote file may also fail due to different mappings of user IDs (UID) or group
|
||
|
|
IDs (GID) on the local and remote systems.</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#EAGAIN">EAGAIN</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#EBADF">EBADF</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#EBADFID">EBADFID</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#EBUSY">EBUSY</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#EDAMAGE">EDAMAGE</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#EFAULT">EFAULT</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#EINTR">EINTR</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#EINVAL">EINVAL</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#EIO">EIO</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#ENOBUFS">ENOBUFS</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#ENOSPC">ENOSPC</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#ENOSYS">ENOSYS</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#ENOTAVAIL">ENOTAVAIL</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#ENOTSAFE">ENOTSAFE</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#EPERM">EPERM</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#EPIPE">EPIPE</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#ERESTART">ERESTART</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#ESTALE">ESTALE</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<p>If you are accessing a remote file through the Network File System, the file
|
||
|
|
may have been deleted at the server.</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#EUNATCH">EUNATCH</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#EUNKNOWN">EUNKNOWN</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
|
||
|
|
<p>If interaction with a file server is required to access the object, <em>
|
||
|
|
errno</em> could also indicate one of the following errors:</p>
|
||
|
|
|
||
|
|
<table cellpadding="5">
|
||
|
|
<!-- cols="25 75" -->
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<th align="left" valign="bottom">Error condition</th>
|
||
|
|
<th align="left" valign="bottom">Additional information</th>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#EADDRNOTAVAIL">EADDRNOTAVAIL</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#ECONNABORTED">ECONNABORTED</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#ECONNREFUSED">ECONNREFUSED</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#ECONNRESET">ECONNRESET</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#EHOSTDOWN">EHOSTDOWN</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#EHOSTUNREACH">EHOSTUNREACH</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#ENETDOWN">ENETDOWN</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#ENETRESET">ENETRESET</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#ENETUNREACH">ENETUNREACH</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#ETIMEDOUT">ETIMEDOUT</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<br>
|
||
|
|
<h3>Error Messages</h3>
|
||
|
|
|
||
|
|
<p>The following messages may be sent from this function:</p>
|
||
|
|
|
||
|
|
<table width="100%" cellpadding="5">
|
||
|
|
<!-- cols="15 85" -->
|
||
|
|
<tr>
|
||
|
|
<th align="left" valign="top">Message ID</th>
|
||
|
|
<th align="left" valign="top">Error Message Text</th>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td valign="top" width="15%">CPFA0D4 E</td>
|
||
|
|
<td valign="top" width="85%">File system error occurred. Error number
|
||
|
|
&1.</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">CPFA081 E</td>
|
||
|
|
<td align="left" valign="top">Unable to set return value or error code.</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">CPF3CF2 E</td>
|
||
|
|
<td align="left" valign="top">Error(s) occurred during running of &1
|
||
|
|
API.</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">CPE3418 E</td>
|
||
|
|
<td align="left" valign="top">Possible APAR condition or hardware failure.</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">CPF9872 E</td>
|
||
|
|
<td align="left" valign="top">Program or service program &1 in library
|
||
|
|
&2 ended. Reason code &3.</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<br>
|
||
|
|
<h3><a name="unotes">Usage Notes</a></h3>
|
||
|
|
|
||
|
|
<ol>
|
||
|
|
<li>This function will fail with error code [ENOTSAFE] when all the following
|
||
|
|
conditions are true:<br>
|
||
|
|
<br>
|
||
|
|
<ul>
|
||
|
|
<li>Where multiple threads exist in the job.</li>
|
||
|
|
|
||
|
|
<li>The object on which this function is operating resides in a file system
|
||
|
|
that is not threadsafe. Only the following file systems are threadsafe for this
|
||
|
|
function:<br>
|
||
|
|
<br>
|
||
|
|
<ul>
|
||
|
|
<li>"Root" (/)</li>
|
||
|
|
|
||
|
|
<li>QOpenSys</li>
|
||
|
|
|
||
|
|
<li>User-defined</li>
|
||
|
|
|
||
|
|
<li>QNTC</li>
|
||
|
|
|
||
|
|
<li>QSYS.LIB</li>
|
||
|
|
|
||
|
|
<li>Independent ASP QSYS.LIB</li>
|
||
|
|
|
||
|
|
<li>QOPT</li>
|
||
|
|
|
||
|
|
<li>Network File System</li>
|
||
|
|
|
||
|
|
<li>QFileSvr.400</li>
|
||
|
|
</ul>
|
||
|
|
</li>
|
||
|
|
</ul>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li>QDLS File System Differences
|
||
|
|
|
||
|
|
<p>QDLS does not support <strong>ioctl()</strong>.</p>
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li>QOPT File System Differences
|
||
|
|
|
||
|
|
<p>QOPT does not support <strong>ioctl()</strong>.</p>
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li>A program must have the appropriate privilege <samp>*IOSYSCFG</samp> to
|
||
|
|
issue any of the following requests: <samp>SIOCADDRT</samp> and <samp>
|
||
|
|
SIOCDELRT</samp>.</li>
|
||
|
|
</ol>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<h3>Related Information</h3>
|
||
|
|
|
||
|
|
<ul>
|
||
|
|
<li>The <<strong>sys/ioctl.h</strong>> file (see <a href="unix13.htm">
|
||
|
|
Header Files for UNIX-Type Functions</a>)
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li>The <<strong>sys/types.h</strong>> file (see <a href="unix13.htm">
|
||
|
|
Header Files for UNIX-Type Functions</a>)
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li><a href="fcntl.htm">fcntl()</a>--Perform File Control Command
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li><a href="../rzab6/rzab6soxoverview.htm">Socket Programming</a></li>
|
||
|
|
</ul>
|
||
|
|
|
||
|
|
<hr>
|
||
|
|
API introduced: V3R1
|
||
|
|
|
||
|
|
<hr>
|
||
|
|
<center>
|
||
|
|
<table cellpadding="2" cellspacing="2">
|
||
|
|
<tr align="center">
|
||
|
|
<td valign="middle" align="center"><a href="#Top_Of_Page">Top</a> | <a href=
|
||
|
|
"unix.htm">UNIX-Type APIs</a> | <a href="aplist.htm">APIs by category</a></td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</center>
|
||
|
|
</body>
|
||
|
|
</html>
|
||
|
|
|