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[linuxjm/LDP_man-pages.git] / original / man2 / connect.2

diff --git a/original/man2/connect.2 b/original/man2/connect.2
index 649f5e7..4be1f95 100644 (file)
--- a/original/man2/connect.2
+++ b/original/man2/connect.2
@@ -1,9 +1,8 @@
-.\" Hey Emacs! This file is -*- nroff -*- source.
-.\"
 .\" Copyright 1993 Rickard E. Faith (faith@cs.unc.edu)
 .\" Portions extracted from /usr/include/sys/socket.h, which does not have
 .\" any authorship information in it.  It is probably available under the GPL.
 .\"
+.\" %%%LICENSE_START(VERBATIM)
 .\" Permission is granted to make and distribute verbatim copies of this
 .\" manual provided the copyright notice and this permission notice are
 .\" preserved on all copies.
@@ -23,6 +22,7 @@
 .\"
 .\" Formatted or processed versions of this manual, if unaccompanied by
 .\" the source, must acknowledge the copyright and authors of this work.
+.\" %%%LICENSE_END
 .\"
 .\"
 .\" Other portions are from the 6.9 (Berkeley) 3/10/91 man page:
@@ -30,6 +30,7 @@
 .\" Copyright (c) 1983 The Regents of the University of California.
 .\" All rights reserved.
 .\"
+.\" %%%LICENSE_START(BSD_4_CLAUSE_UCB)
 .\" Redistribution and use in source and binary forms, with or without
 .\" modification, are permitted provided that the following conditions
 .\" are met:
@@ -57,12 +58,13 @@
 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
+.\" %%%LICENSE_END
 .\"
 .\" Modified 1997-01-31 by Eric S. Raymond <esr@thyrsus.com>
 .\" Modified 1998, 1999 by Andi Kleen
 .\" Modified 2004-06-23 by Michael Kerrisk <mtk.manpages@gmail.com>
 .\"
-.TH CONNECT 2 2008-12-03 "Linux" "Linux Programmer's Manual"
+.TH CONNECT 2 2014-09-06 "Linux" "Linux Programmer's Manual"
 .SH NAME
 connect \- initiate a connection on a socket
 .SH SYNOPSIS
@@ -96,7 +98,7 @@ for further details.
 If the socket
 .I sockfd
 is of type
-.B SOCK_DGRAM
+.BR SOCK_DGRAM ,
 then
 .I addr
 is the address to which datagrams are sent by default, and the only
@@ -122,7 +124,7 @@ member of
 set to
 .BR AF_UNSPEC
 (supported on Linux since kernel 2.2).
-.SH "RETURN VALUE"
+.SH RETURN VALUE
 If the connection or binding succeeds, zero is returned.
 On error, \-1 is returned, and
 .I errno
@@ -147,19 +149,26 @@ firewall rule.
 .B EADDRINUSE
 Local address is already in use.
 .TP
+.B EADDRNOTAVAIL
+(Internet domain sockets)
+The socket referred to by
+.I sockfd
+had not previously been bound to an address and,
+upon attempting to bind it to an ephemeral port,
+it was determined that all port numbers in the ephemeral port range
+are currently in use.
+See the discussion of
+.I /proc/sys/net/ipv4/ip_local_port_range
+in
+.BR ip (7).
+.TP
 .B EAFNOSUPPORT
 The passed address didn't have the correct address family in its
 .I sa_family
 field.
 .TP
 .B EAGAIN
-No more free local ports or insufficient entries in the routing cache.
-For
-.B AF_INET
-see the description of
-.I /proc/sys/net/ipv4/ip_local_port_range
-.BR ip (7)
-for information on how to increase the number of local ports.
+Insufficient entries in the routing cache.
 .TP
 .B EALREADY
 The socket is nonblocking and a previous connection attempt has not yet
@@ -214,13 +223,18 @@ Network is unreachable.
 .B ENOTSOCK
 The file descriptor is not associated with a socket.
 .TP
+.B EPROTOTYPE
+The socket type does not support the requested communications protocol.
+This error can occur, for example,
+on an attempt to connect a UNIX domain datagram socket to a stream socket.
+.TP
 .B ETIMEDOUT
 Timeout while attempting connection.
 The server may be too
 busy to accept new connections.
 Note that for IP sockets the timeout may
 be very long when syncookies are enabled on the server.
-.SH "CONFORMING TO"
+.SH CONFORMING TO
 SVr4, 4.4BSD, (the
 .BR connect ()
 function first appeared in 4.2BSD), POSIX.1-2001.
@@ -253,15 +267,30 @@ Some POSIX confusion resulted in the present
 also used by glibc.
 See also
 .BR accept (2).
+
+If
+.BR connect ()
+fails, consider the state of the socket as unspecified.
+Portable applications should close the socket and create a new one for
+reconnecting.
 .SH EXAMPLE
 An example of the use of
 .BR connect ()
 is shown in
 .BR getaddrinfo (3).
-.SH "SEE ALSO"
+.SH SEE ALSO
 .BR accept (2),
 .BR bind (2),
 .BR getsockname (2),
 .BR listen (2),
 .BR socket (2),
 .BR path_resolution (7)
+.SH COLOPHON
+This page is part of release 3.79 of the Linux
+.I man-pages
+project.
+A description of the project,
+information about reporting bugs,
+and the latest version of this page,
+can be found at
+\%http://www.kernel.org/doc/man\-pages/.