Index: head/lib/libc/sys/connect.2 =================================================================== --- head/lib/libc/sys/connect.2 (revision 295271) +++ head/lib/libc/sys/connect.2 (revision 295272) @@ -1,178 +1,186 @@ .\" Copyright (c) 1983, 1993 .\" The Regents of the University of California. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 4. Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" 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. .\" .\" @(#)connect.2 8.1 (Berkeley) 6/4/93 .\" $FreeBSD$ .\" -.Dd September 29, 2014 +.Dd February 4, 2016 .Dt CONNECT 2 .Os .Sh NAME .Nm connect .Nd initiate a connection on a socket .Sh LIBRARY .Lb libc .Sh SYNOPSIS .In sys/types.h .In sys/socket.h .Ft int .Fn connect "int s" "const struct sockaddr *name" "socklen_t namelen" .Sh DESCRIPTION The .Fa s argument is a socket. If it is of type .Dv SOCK_DGRAM , this call specifies the peer with which the socket is to be associated; this address is that to which datagrams are to be sent, and the only address from which datagrams are to be received. If the socket is of type .Dv SOCK_STREAM , this call attempts to make a connection to another socket. The other socket is specified by .Fa name , which is an address in the communications space of the socket. +.Fa namelen +indicates the amount of space pointed to by +.Fa name , +in bytes; the +.Fa sa_len +member of +.Fa name +is ignored. Each communications space interprets the .Fa name argument in its own way. Generally, stream sockets may successfully .Fn connect only once; datagram sockets may use .Fn connect multiple times to change their association. Datagram sockets may dissolve the association by connecting to an invalid address, such as a null address. .Sh RETURN VALUES .Rv -std connect .Sh ERRORS The .Fn connect system call fails if: .Bl -tag -width Er .It Bq Er EBADF The .Fa s argument is not a valid descriptor. .It Bq Er EINVAL The .Fa namelen argument is not a valid length for the address family. .It Bq Er ENOTSOCK The .Fa s argument is a descriptor for a file, not a socket. .It Bq Er EADDRNOTAVAIL The specified address is not available on this machine. .It Bq Er EAFNOSUPPORT Addresses in the specified address family cannot be used with this socket. .It Bq Er EISCONN The socket is already connected. .It Bq Er ETIMEDOUT Connection establishment timed out without establishing a connection. .It Bq Er ECONNREFUSED The attempt to connect was forcefully rejected. .It Bq Er ECONNRESET The connection was reset by the remote host. .It Bq Er ENETUNREACH The network is not reachable from this host. .It Bq Er EHOSTUNREACH The remote host is not reachable from this host. .It Bq Er EADDRINUSE The address is already in use. .It Bq Er EFAULT The .Fa name argument specifies an area outside the process address space. .It Bq Er EINPROGRESS The socket is non-blocking and the connection cannot be completed immediately. It is possible to .Xr select 2 for completion by selecting the socket for writing. .It Bq Er EINTR The connection attempt was interrupted by the delivery of a signal. The connection will be established in the background, as in the case of .Er EINPROGRESS . .It Bq Er EALREADY A previous connection attempt has not yet been completed. .It Bq Er EACCES An attempt is made to connect to a broadcast address (obtained through the .Dv INADDR_BROADCAST constant or the .Dv INADDR_NONE return value) through a socket that does not provide broadcast functionality. .It Bq Er EAGAIN An auto-assigned port number was requested but no auto-assigned ports are available. Increasing the port range specified by .Xr sysctl 3 MIB variables .Va net.inet.ip.portrange.first and .Va net.inet.ip.portrange.last may alleviate the problem. .El .Pp The following errors are specific to connecting names in the UNIX domain. These errors may not apply in future versions of the UNIX IPC domain. .Bl -tag -width Er .It Bq Er ENOTDIR A component of the path prefix is not a directory. .It Bq Er ENAMETOOLONG A component of a pathname exceeded 255 characters, or an entire path name exceeded 1023 characters. .It Bq Er ENOENT The named socket does not exist. .It Bq Er EACCES Search permission is denied for a component of the path prefix. .It Bq Er EACCES Write access to the named socket is denied. .It Bq Er ELOOP Too many symbolic links were encountered in translating the pathname. .It Bq Er EPERM Write access to the named socket is denied. .El .Sh SEE ALSO .Xr accept 2 , .Xr getpeername 2 , .Xr getsockname 2 , .Xr select 2 , .Xr socket 2 , .Xr sysctl 3 , .Xr sysctl 8 .Sh HISTORY The .Fn connect system call appeared in .Bx 4.2 .