716 lines
16 KiB
HTML
716 lines
16 KiB
HTML
|
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
|
<HTML><HEAD><TITLE>Man page of SOCKET</TITLE>
|
|
</HEAD><BODY>
|
|
<H1>SOCKET</H1>
|
|
Section: Linux Programmer's Manual (2)<BR>Updated: 2019-03-06<BR><A HREF="#index">Index</A>
|
|
<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
|
|
|
|
<A NAME="lbAB"> </A>
|
|
<H2>NAME</H2>
|
|
|
|
socket - create an endpoint for communication
|
|
<A NAME="lbAC"> </A>
|
|
<H2>SYNOPSIS</H2>
|
|
|
|
<B>#include <<A HREF="file:///usr/include/sys/types.h">sys/types.h</A>></B> /* See NOTES */
|
|
|
|
<BR>
|
|
|
|
<B>#include <<A HREF="file:///usr/include/sys/socket.h">sys/socket.h</A>></B>
|
|
|
|
<P>
|
|
|
|
<B>int socket(int </B><I>domain</I><B>, int </B><I>type</I><B>, int </B><I>protocol</I><B>);</B>
|
|
|
|
<A NAME="lbAD"> </A>
|
|
<H2>DESCRIPTION</H2>
|
|
|
|
<B>socket</B>()
|
|
|
|
creates an endpoint for communication and returns a file descriptor
|
|
that refers to that endpoint.
|
|
The file descriptor returned by a successful call will be
|
|
the lowest-numbered file descriptor not currently open for the process.
|
|
<P>
|
|
|
|
The
|
|
<I>domain</I>
|
|
|
|
argument specifies a communication domain; this selects the protocol
|
|
family which will be used for communication.
|
|
These families are defined in
|
|
<I><<A HREF="file:///usr/include/sys/socket.h">sys/socket.h</A>></I>.
|
|
|
|
The formats currently understood by the Linux kernel include:
|
|
<TABLE>
|
|
<TR VALIGN=top><TD>Name </TD><TD>Purpose</TD><TD>Man page<BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_UNIX</B>
|
|
|
|
</TD><TD>
|
|
Local communication
|
|
</TD><TD>
|
|
<B><A HREF="/cgi-bin/man/man2html?7+unix">unix</A></B>(7)
|
|
|
|
<BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_LOCAL</B>
|
|
|
|
</TD><TD>
|
|
Synonym for
|
|
<B>AF_UNIX</B>
|
|
|
|
</TD><TD>
|
|
<BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_INET</B>
|
|
|
|
</TD><TD>IPv4 Internet protocols</TD><TD>
|
|
<B><A HREF="/cgi-bin/man/man2html?7+ip">ip</A></B>(7)
|
|
|
|
<BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_AX25</B>
|
|
|
|
</TD><TD>
|
|
Amateur radio AX.25 protocol
|
|
</TD><TD>
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?4+ax25">ax25</A></B>(4)
|
|
|
|
<BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_IPX</B>
|
|
|
|
</TD><TD>IPX - Novell protocols</TD><TD><BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_APPLETALK</B>
|
|
|
|
</TD><TD>AppleTalk</TD><TD>
|
|
<B><A HREF="/cgi-bin/man/man2html?7+ddp">ddp</A></B>(7)
|
|
|
|
<BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_X25</B>
|
|
|
|
</TD><TD>ITU-T X.25 / ISO-8208 protocol</TD><TD>
|
|
<B><A HREF="/cgi-bin/man/man2html?7+x25">x25</A></B>(7)
|
|
|
|
<BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_INET6</B>
|
|
|
|
</TD><TD>IPv6 Internet protocols</TD><TD>
|
|
<B><A HREF="/cgi-bin/man/man2html?7+ipv6">ipv6</A></B>(7)
|
|
|
|
<BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_DECnet</B>
|
|
|
|
</TD><TD>
|
|
DECet protocol sockets
|
|
</TD><TD><BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_KEY</B>
|
|
|
|
</TD><TD>
|
|
Key management protocol, originally developed for usage with IPsec
|
|
</TD><TD><BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_NETLINK</B>
|
|
|
|
</TD><TD>
|
|
Kernel user interface device
|
|
</TD><TD>
|
|
<B><A HREF="/cgi-bin/man/man2html?7+netlink">netlink</A></B>(7)
|
|
|
|
<BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_PACKET</B>
|
|
|
|
</TD><TD>
|
|
Low-level packet interface
|
|
</TD><TD>
|
|
<B><A HREF="/cgi-bin/man/man2html?7+packet">packet</A></B>(7)
|
|
|
|
<BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_RDS</B>
|
|
|
|
</TD><TD>
|
|
|
|
Reliable Datagram Sockets (RDS) protocol
|
|
</TD><TD>
|
|
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?7+rds">rds</A></B>(7)
|
|
|
|
<BR>
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?7+rds-rdma">rds-rdma</A></B>(7)
|
|
|
|
<BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_PPPOX</B>
|
|
|
|
</TD><TD>
|
|
Generic PPP transport layer, for setting up L2 tunnels
|
|
(L2TP and PPPoE)
|
|
</TD><TD><BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_LLC</B>
|
|
|
|
</TD><TD>
|
|
|
|
Logical link control (IEEE 802.2 LLC) protocol
|
|
</TD><TD><BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_IB</B>
|
|
|
|
</TD><TD>
|
|
|
|
InfiniBand native addressing
|
|
</TD><TD><BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_MPLS</B>
|
|
|
|
</TD><TD>
|
|
|
|
Multiprotocol Label Switching
|
|
</TD><TD><BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_CAN</B>
|
|
|
|
</TD><TD>
|
|
|
|
Controller Area Network automotive bus protocol
|
|
</TD><TD><BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_TIPC</B>
|
|
|
|
</TD><TD>
|
|
|
|
TIPC, "cluster domain sockets" protocol
|
|
</TD><TD><BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_BLUETOOTH</B>
|
|
|
|
</TD><TD>
|
|
|
|
Bluetooth low-level socket protocol
|
|
</TD><TD><BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_ALG</B>
|
|
|
|
</TD><TD>
|
|
|
|
Interface to kernel crypto API
|
|
</TD><TD><BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_VSOCK</B>
|
|
|
|
</TD><TD>
|
|
|
|
VSOCK (originally "VMWare VSockets") protocol
|
|
for hypervisor-guest communication
|
|
</TD><TD>
|
|
<B><A HREF="/cgi-bin/man/man2html?7+vsock">vsock</A></B>(7)
|
|
|
|
<BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_KCM</B>
|
|
|
|
</TD><TD>
|
|
|
|
KCM (kernel connection multiplexor) interface
|
|
</TD><TD><BR></TD></TR>
|
|
<TR VALIGN=top><TD>
|
|
<B>AF_XDP</B>
|
|
|
|
</TD><TD>
|
|
|
|
XDP (express data path) interface
|
|
</TD><TD><BR></TD></TR>
|
|
</TABLE>
|
|
|
|
<P>
|
|
|
|
Further details of the above address families,
|
|
as well as information on several other address families, can be found in
|
|
<B><A HREF="/cgi-bin/man/man2html?7+address_families">address_families</A></B>(7).
|
|
|
|
<P>
|
|
|
|
The socket has the indicated
|
|
<I>type</I>,
|
|
|
|
which specifies the communication semantics.
|
|
Currently defined types
|
|
are:
|
|
<DL COMPACT>
|
|
<DT id="1"><B>SOCK_STREAM</B>
|
|
|
|
<DD>
|
|
Provides sequenced, reliable, two-way, connection-based byte streams.
|
|
An out-of-band data transmission mechanism may be supported.
|
|
<DT id="2"><B>SOCK_DGRAM</B>
|
|
|
|
<DD>
|
|
Supports datagrams (connectionless, unreliable messages of a fixed
|
|
maximum length).
|
|
<DT id="3"><B>SOCK_SEQPACKET</B>
|
|
|
|
<DD>
|
|
Provides a sequenced, reliable, two-way connection-based data
|
|
transmission path for datagrams of fixed maximum length; a consumer is
|
|
required to read an entire packet with each input system call.
|
|
<DT id="4"><B>SOCK_RAW</B>
|
|
|
|
<DD>
|
|
Provides raw network protocol access.
|
|
<DT id="5"><B>SOCK_RDM</B>
|
|
|
|
<DD>
|
|
Provides a reliable datagram layer that does not guarantee ordering.
|
|
<DT id="6"><B>SOCK_PACKET</B>
|
|
|
|
<DD>
|
|
Obsolete and should not be used in new programs;
|
|
see
|
|
<B><A HREF="/cgi-bin/man/man2html?7+packet">packet</A></B>(7).
|
|
|
|
</DL>
|
|
<P>
|
|
|
|
Some socket types may not be implemented by all protocol families.
|
|
<P>
|
|
|
|
Since Linux 2.6.27, the
|
|
<I>type</I>
|
|
|
|
argument serves a second purpose:
|
|
in addition to specifying a socket type,
|
|
it may include the bitwise OR of any of the following values,
|
|
to modify the behavior of
|
|
<B>socket</B>():
|
|
|
|
<DL COMPACT>
|
|
<DT id="7"><B>SOCK_NONBLOCK</B>
|
|
|
|
<DD>
|
|
Set the
|
|
<B>O_NONBLOCK</B>
|
|
|
|
file status flag on the open file description (see
|
|
<B><A HREF="/cgi-bin/man/man2html?2+open">open</A></B>(2))
|
|
|
|
referred to by the new file descriptor.
|
|
Using this flag saves extra calls to
|
|
<B><A HREF="/cgi-bin/man/man2html?2+fcntl">fcntl</A></B>(2)
|
|
|
|
to achieve the same result.
|
|
<DT id="8"><B>SOCK_CLOEXEC</B>
|
|
|
|
<DD>
|
|
Set the close-on-exec
|
|
(<B>FD_CLOEXEC</B>)
|
|
|
|
flag on the new file descriptor.
|
|
See the description of the
|
|
<B>O_CLOEXEC</B>
|
|
|
|
flag in
|
|
<B><A HREF="/cgi-bin/man/man2html?2+open">open</A></B>(2)
|
|
|
|
for reasons why this may be useful.
|
|
</DL>
|
|
<P>
|
|
|
|
The
|
|
<I>protocol</I>
|
|
|
|
specifies a particular protocol to be used with the socket.
|
|
Normally only a single protocol exists to support a particular
|
|
socket type within a given protocol family, in which case
|
|
<I>protocol</I>
|
|
|
|
can be specified as 0.
|
|
However, it is possible that many protocols may exist, in
|
|
which case a particular protocol must be specified in this manner.
|
|
The protocol number to use is specific to the ``communication domain''
|
|
in which communication is to take place; see
|
|
<B><A HREF="/cgi-bin/man/man2html?5+protocols">protocols</A></B>(5).
|
|
|
|
See
|
|
<B><A HREF="/cgi-bin/man/man2html?3+getprotoent">getprotoent</A></B>(3)
|
|
|
|
on how to map protocol name strings to protocol numbers.
|
|
<P>
|
|
|
|
Sockets of type
|
|
<B>SOCK_STREAM</B>
|
|
|
|
are full-duplex byte streams.
|
|
They do not preserve
|
|
record boundaries.
|
|
A stream socket must be in
|
|
a
|
|
<I>connected</I>
|
|
|
|
state before any data may be sent or received on it.
|
|
A connection to
|
|
another socket is created with a
|
|
<B><A HREF="/cgi-bin/man/man2html?2+connect">connect</A></B>(2)
|
|
|
|
call.
|
|
Once connected, data may be transferred using
|
|
<B><A HREF="/cgi-bin/man/man2html?2+read">read</A></B>(2)
|
|
|
|
and
|
|
<B><A HREF="/cgi-bin/man/man2html?2+write">write</A></B>(2)
|
|
|
|
calls or some variant of the
|
|
<B><A HREF="/cgi-bin/man/man2html?2+send">send</A></B>(2)
|
|
|
|
and
|
|
<B><A HREF="/cgi-bin/man/man2html?2+recv">recv</A></B>(2)
|
|
|
|
calls.
|
|
When a session has been completed a
|
|
<B><A HREF="/cgi-bin/man/man2html?2+close">close</A></B>(2)
|
|
|
|
may be performed.
|
|
Out-of-band data may also be transmitted as described in
|
|
<B><A HREF="/cgi-bin/man/man2html?2+send">send</A></B>(2)
|
|
|
|
and received as described in
|
|
<B><A HREF="/cgi-bin/man/man2html?2+recv">recv</A></B>(2).
|
|
|
|
<P>
|
|
|
|
The communications protocols which implement a
|
|
<B>SOCK_STREAM</B>
|
|
|
|
ensure that data is not lost or duplicated.
|
|
If a piece of data for which
|
|
the peer protocol has buffer space cannot be successfully transmitted
|
|
within a reasonable length of time, then the connection is considered
|
|
to be dead.
|
|
When
|
|
<B>SO_KEEPALIVE</B>
|
|
|
|
is enabled on the socket the protocol checks in a protocol-specific
|
|
manner if the other end is still alive.
|
|
A
|
|
<B>SIGPIPE</B>
|
|
|
|
signal is raised if a process sends or receives
|
|
on a broken stream; this causes naive processes,
|
|
which do not handle the signal, to exit.
|
|
<B>SOCK_SEQPACKET</B>
|
|
|
|
sockets employ the same system calls as
|
|
<B>SOCK_STREAM</B>
|
|
|
|
sockets.
|
|
The only difference is that
|
|
<B><A HREF="/cgi-bin/man/man2html?2+read">read</A></B>(2)
|
|
|
|
calls will return only the amount of data requested,
|
|
and any data remaining in the arriving packet will be discarded.
|
|
Also all message boundaries in incoming datagrams are preserved.
|
|
<P>
|
|
|
|
<B>SOCK_DGRAM</B>
|
|
|
|
and
|
|
<B>SOCK_RAW</B>
|
|
|
|
sockets allow sending of datagrams to correspondents named in
|
|
<B><A HREF="/cgi-bin/man/man2html?2+sendto">sendto</A></B>(2)
|
|
|
|
calls.
|
|
Datagrams are generally received with
|
|
<B><A HREF="/cgi-bin/man/man2html?2+recvfrom">recvfrom</A></B>(2),
|
|
|
|
which returns the next datagram along with the address of its sender.
|
|
<P>
|
|
|
|
<B>SOCK_PACKET</B>
|
|
|
|
is an obsolete socket type to receive raw packets directly from the
|
|
device driver.
|
|
Use
|
|
<B><A HREF="/cgi-bin/man/man2html?7+packet">packet</A></B>(7)
|
|
|
|
instead.
|
|
<P>
|
|
|
|
An
|
|
<B><A HREF="/cgi-bin/man/man2html?2+fcntl">fcntl</A></B>(2)
|
|
|
|
<B>F_SETOWN</B>
|
|
|
|
operation can be used to specify a process or process group to receive a
|
|
<B>SIGURG</B>
|
|
|
|
signal when the out-of-band data arrives or
|
|
<B>SIGPIPE</B>
|
|
|
|
signal when a
|
|
<B>SOCK_STREAM</B>
|
|
|
|
connection breaks unexpectedly.
|
|
This operation may also be used to set the process or process group
|
|
that receives the I/O and asynchronous notification of I/O events via
|
|
<B>SIGIO</B>.
|
|
|
|
Using
|
|
<B>F_SETOWN</B>
|
|
|
|
is equivalent to an
|
|
<B><A HREF="/cgi-bin/man/man2html?2+ioctl">ioctl</A></B>(2)
|
|
|
|
call with the
|
|
<B>FIOSETOWN</B>
|
|
|
|
or
|
|
<B>SIOCSPGRP</B>
|
|
|
|
argument.
|
|
<P>
|
|
|
|
When the network signals an error condition to the protocol module (e.g.,
|
|
using an ICMP message for IP) the pending error flag is set for the socket.
|
|
The next operation on this socket will return the error code of the pending
|
|
error.
|
|
For some protocols it is possible to enable a per-socket error queue
|
|
to retrieve detailed information about the error; see
|
|
<B>IP_RECVERR</B>
|
|
|
|
in
|
|
<B><A HREF="/cgi-bin/man/man2html?7+ip">ip</A></B>(7).
|
|
|
|
<P>
|
|
|
|
The operation of sockets is controlled by socket level
|
|
<I>options</I>.
|
|
|
|
These options are defined in
|
|
<I><<A HREF="file:///usr/include/sys/socket.h">sys/socket.h</A>></I>.
|
|
|
|
The functions
|
|
<B><A HREF="/cgi-bin/man/man2html?2+setsockopt">setsockopt</A></B>(2)
|
|
|
|
and
|
|
<B><A HREF="/cgi-bin/man/man2html?2+getsockopt">getsockopt</A></B>(2)
|
|
|
|
are used to set and get options.
|
|
<A NAME="lbAE"> </A>
|
|
<H2>RETURN VALUE</H2>
|
|
|
|
On success, a file descriptor for the new socket is returned.
|
|
On error, -1 is returned, and
|
|
<I>errno</I>
|
|
|
|
is set appropriately.
|
|
<A NAME="lbAF"> </A>
|
|
<H2>ERRORS</H2>
|
|
|
|
<DL COMPACT>
|
|
<DT id="9"><B>EACCES</B>
|
|
|
|
<DD>
|
|
Permission to create a socket of the specified type and/or protocol
|
|
is denied.
|
|
<DT id="10"><B>EAFNOSUPPORT</B>
|
|
|
|
<DD>
|
|
The implementation does not support the specified address family.
|
|
<DT id="11"><B>EINVAL</B>
|
|
|
|
<DD>
|
|
Unknown protocol, or protocol family not available.
|
|
<DT id="12"><B>EINVAL</B>
|
|
|
|
<DD>
|
|
|
|
Invalid flags in
|
|
<I>type</I>.
|
|
|
|
<DT id="13"><B>EMFILE</B>
|
|
|
|
<DD>
|
|
The per-process limit on the number of open file descriptors has been reached.
|
|
<DT id="14"><B>ENFILE</B>
|
|
|
|
<DD>
|
|
The system-wide limit on the total number of open files has been reached.
|
|
<DT id="15"><B>ENOBUFS</B> or <B>ENOMEM</B>
|
|
|
|
<DD>
|
|
Insufficient memory is available.
|
|
The socket cannot be
|
|
created until sufficient resources are freed.
|
|
<DT id="16"><B>EPROTONOSUPPORT</B>
|
|
|
|
<DD>
|
|
The protocol type or the specified protocol is not
|
|
supported within this domain.
|
|
</DL>
|
|
<P>
|
|
|
|
Other errors may be generated by the underlying protocol modules.
|
|
<A NAME="lbAG"> </A>
|
|
<H2>CONFORMING TO</H2>
|
|
|
|
POSIX.1-2001, POSIX.1-2008, 4.4BSD.
|
|
<P>
|
|
|
|
The
|
|
<B>SOCK_NONBLOCK</B>
|
|
|
|
and
|
|
<B>SOCK_CLOEXEC</B>
|
|
|
|
flags are Linux-specific.
|
|
<P>
|
|
|
|
<B>socket</B>()
|
|
|
|
appeared in 4.2BSD.
|
|
It is generally portable to/from
|
|
non-BSD systems supporting clones of the BSD socket layer (including
|
|
System V variants).
|
|
<A NAME="lbAH"> </A>
|
|
<H2>NOTES</H2>
|
|
|
|
POSIX.1 does not require the inclusion of
|
|
<I><<A HREF="file:///usr/include/sys/types.h">sys/types.h</A>></I>,
|
|
|
|
and this header file is not required on Linux.
|
|
However, some historical (BSD) implementations required this header
|
|
file, and portable applications are probably wise to include it.
|
|
<P>
|
|
|
|
The manifest constants used under 4.x BSD for protocol families
|
|
are
|
|
<B>PF_UNIX</B>,
|
|
|
|
<B>PF_INET</B>,
|
|
|
|
and so on, while
|
|
<B>AF_UNIX</B>,
|
|
|
|
<B>AF_INET</B>,
|
|
|
|
and so on are used for address
|
|
families.
|
|
However, already the BSD man page promises: "The protocol
|
|
family generally is the same as the address family", and subsequent
|
|
standards use AF_* everywhere.
|
|
<A NAME="lbAI"> </A>
|
|
<H2>EXAMPLE</H2>
|
|
|
|
An example of the use of
|
|
<B>socket</B>()
|
|
|
|
is shown in
|
|
<B><A HREF="/cgi-bin/man/man2html?3+getaddrinfo">getaddrinfo</A></B>(3).
|
|
|
|
<A NAME="lbAJ"> </A>
|
|
<H2>SEE ALSO</H2>
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?2+accept">accept</A></B>(2),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?2+bind">bind</A></B>(2),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?2+close">close</A></B>(2),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?2+connect">connect</A></B>(2),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?2+fcntl">fcntl</A></B>(2),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?2+getpeername">getpeername</A></B>(2),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?2+getsockname">getsockname</A></B>(2),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?2+getsockopt">getsockopt</A></B>(2),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?2+ioctl">ioctl</A></B>(2),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?2+listen">listen</A></B>(2),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?2+read">read</A></B>(2),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?2+recv">recv</A></B>(2),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?2+select">select</A></B>(2),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?2+send">send</A></B>(2),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?2+shutdown">shutdown</A></B>(2),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?2+socketpair">socketpair</A></B>(2),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?2+write">write</A></B>(2),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?3+getprotoent">getprotoent</A></B>(3),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?7+address_families">address_families</A></B>(7),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?7+ip">ip</A></B>(7),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?7+socket">socket</A></B>(7),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?7+tcp">tcp</A></B>(7),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?7+udp">udp</A></B>(7),
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?7+unix">unix</A></B>(7)
|
|
|
|
<P>
|
|
|
|
"An Introductory 4.3BSD Interprocess Communication Tutorial"
|
|
and
|
|
"BSD Interprocess Communication Tutorial",
|
|
reprinted in
|
|
<I>UNIX Programmer's Supplementary Documents Volume 1.</I>
|
|
|
|
<A NAME="lbAK"> </A>
|
|
<H2>COLOPHON</H2>
|
|
|
|
This page is part of release 5.05 of the Linux
|
|
<I>man-pages</I>
|
|
|
|
project.
|
|
A description of the project,
|
|
information about reporting bugs,
|
|
and the latest version of this page,
|
|
can be found at
|
|
<A HREF="https://www.kernel.org/doc/man-pages/.">https://www.kernel.org/doc/man-pages/.</A>
|
|
<P>
|
|
|
|
<HR>
|
|
<A NAME="index"> </A><H2>Index</H2>
|
|
<DL>
|
|
<DT id="17"><A HREF="#lbAB">NAME</A><DD>
|
|
<DT id="18"><A HREF="#lbAC">SYNOPSIS</A><DD>
|
|
<DT id="19"><A HREF="#lbAD">DESCRIPTION</A><DD>
|
|
<DT id="20"><A HREF="#lbAE">RETURN VALUE</A><DD>
|
|
<DT id="21"><A HREF="#lbAF">ERRORS</A><DD>
|
|
<DT id="22"><A HREF="#lbAG">CONFORMING TO</A><DD>
|
|
<DT id="23"><A HREF="#lbAH">NOTES</A><DD>
|
|
<DT id="24"><A HREF="#lbAI">EXAMPLE</A><DD>
|
|
<DT id="25"><A HREF="#lbAJ">SEE ALSO</A><DD>
|
|
<DT id="26"><A HREF="#lbAK">COLOPHON</A><DD>
|
|
</DL>
|
|
<HR>
|
|
This document was created by
|
|
<A HREF="/cgi-bin/man/man2html">man2html</A>,
|
|
using the manual pages.<BR>
|
|
Time: 00:05:34 GMT, March 31, 2021
|
|
</BODY>
|
|
</HTML>
|