xnu-4903.270.47.tar.gz

[apple/xnu.git] / bsd / man / man2 / connect.2

diff --git a/bsd/man/man2/connect.2 b/bsd/man/man2/connect.2
index e06e59fc534607044127d903c878176c6baef1d4..c5a06d67458d1c1d2e53c5cc1a8815dfa5143fbe 100644 (file)
--- a/bsd/man/man2/connect.2
+++ b/bsd/man/man2/connect.2
@@ -33,7 +33,7 @@
 .\"
 .\"     @(#)connect.2  8.1 (Berkeley) 6/4/93
 .\"
 .\"
 .\"     @(#)connect.2  8.1 (Berkeley) 6/4/93
 .\"

-.Dd June 4, 1993
+.Dd March 18, 2015

 .Dt CONNECT 2
 .Os BSD 4.2
 .Sh NAME
 .Dt CONNECT 2
 .Os BSD 4.2
 .Sh NAME


@@ -43,10 +43,14 @@
 .Fd #include <sys/types.h>
 .Fd #include <sys/socket.h>
 .Ft int
 .Fd #include <sys/types.h>
 .Fd #include <sys/socket.h>
 .Ft int

-.Fn connect "int s" "const struct sockaddr *name" "int namelen"
+.Fo connect
+.Fa "int socket"
+.Fa "const struct sockaddr *address"
+.Fa "socklen_t address_len"
+.Fc

 .Sh DESCRIPTION
 The parameter
 .Sh DESCRIPTION
 The parameter

-.Fa s
+.Fa socket

 is a socket.
 If it is of type
 .Dv SOCK_DGRAM ,
 is a socket.
 If it is of type
 .Dv SOCK_DGRAM ,


@@ -58,10 +62,11 @@ If the socket is of type
 this call attempts to make a connection to
 another socket.
 The other socket is specified by
 this call attempts to make a connection to
 another socket.
 The other socket is specified by

-.Fa name ,
+.Fa address ,

 which is an address in the communications space of the socket.
 which is an address in the communications space of the socket.

+.Pp

 Each communications space interprets the
 Each communications space interprets the

-.Fa name
+.Fa address

 parameter in its own way.
 Generally, stream sockets may successfully
 .Fn connect
 parameter in its own way.
 Generally, stream sockets may successfully
 .Fn connect


@@ -69,45 +74,64 @@ only once; datagram sockets may use
 .Fn connect
 multiple times to change their association.
 Datagram sockets may dissolve the association
 .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 
+by calling
+.Xr disconnectx 2 ,
+or by connecting to an invalid address, such as a null address

 or an address with 
 or an address with 

-the address family set to AF_UNPSEC (the error 
-EAFNOSUPPORT will be harmlessly returned).
+the address family set to 
+.Dv AF_UNSPEC 
+(the error 
+.Dv EAFNOSUPPORT 
+will be harmlessly returned).

 .Sh RETURN VALUES
 .Sh RETURN VALUES

-If the connection or binding succeeds, 0 is returned.
-Otherwise a -1 is returned, and a more specific error
-code is stored in
-.Va errno .
+Upon successful completion, a value of 0 is returned.
+Otherwise, a value of -1 is returned and the global integer variable
+.Va errno
+is set to indicate the error.

 .Sh ERRORS
 The
 .Fn connect
 .Sh ERRORS
 The
 .Fn connect

-call fails if:
+system call will fail if:

 .Bl -tag -width Er
 .Bl -tag -width Er

-.It Bq Er EBADF
-.Fa S
-is not a valid descriptor.
-.It Bq Er ENOTSOCK
-.Fa S
-is a descriptor for a file, not a socket.
+.\" ==========
+.It Bq Er EACCES
+The destination address is a broadcast address and the 
+socket option 
+.Dv SO_BROADCAST 
+is not set.
+.\" ==========
+.It Bq Er EADDRINUSE
+The address is already in use.
+.\" ==========

 .It Bq Er EADDRNOTAVAIL
 The specified address is not available on this machine.
 .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 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 EALREADY
+The socket is non-blocking
+and a previous connection attempt
+has not yet been completed.
+.\" ==========
+.It Bq Er EBADF
+.Fa socket
+is not a valid descriptor.
+.\" ==========

 .It Bq Er ECONNREFUSED
 .It Bq Er ECONNREFUSED

-The attempt to connect was forcefully rejected.
-.It Bq Er ENETUNREACH
-The network isn't reachable from this host.
-.It Bq Er EADDRINUSE
-The address is already in use.
+The attempt to connect was ignored
+(because the target is not listening for connections)
+or explicitly rejected.
+.\" ==========

 .It Bq Er EFAULT
 The
 .It Bq Er EFAULT
 The

-.Fa name
+.Fa address

 parameter specifies an area outside
 the process address space.
 parameter specifies an area outside
 the process address space.

+.\" ==========
+.It Bq Er EHOSTUNREACH
+The target host cannot be reached (e.g., down, disconnected).
+.\" ==========

 .It Bq Er EINPROGRESS
 The socket is non-blocking 
 and the connection cannot
 .It Bq Er EINPROGRESS
 The socket is non-blocking 
 and the connection cannot


@@ -115,37 +139,95 @@ be completed immediately.
 It is possible to
 .Xr select 2
 for completion by selecting the socket for writing.
 It is possible to
 .Xr select 2
 for completion by selecting the socket for writing.

-.It Bq Er EALREADY
-The socket is non-blocking
-and a previous connection attempt
-has not yet been completed.
+.\" ==========
+.It Bq Er EINTR
+Its execution was interrupted by a signal.
+.\" ==========
+.It Bq Er EINVAL
+An invalid argument was detected
+(e.g.,
+.Fa address_len
+is not valid for the address family,
+the specified address family is invalid).
+.\" ==========
+.It Bq Er EISCONN
+The socket is already connected.
+.\" ==========
+.It Bq Er ENETDOWN
+The local network interface is not functioning.
+.\" ==========
+.It Bq Er ENETUNREACH
+The network isn't reachable from this host.
+.\" ==========
+.It Bq Er ENOBUFS
+The system call was unable to allocate a needed memory buffer.
+.\" ==========
+.It Bq Er ENOTSOCK
+.Fa socket
+is not a file descriptor for a socket.
+.\" ==========
+.It Bq Er EOPNOTSUPP
+Because
+.Fa socket
+is listening, no connection is allowed.
+.\" ==========
+.It Bq Er EPROTOTYPE
+.Fa address
+has a different type than the socket
+that is bound to the specified peer address.
+.\" ==========
+.It Bq Er ETIMEDOUT
+Connection establishment timed out without establishing a connection.
+.\" ==========
+.It Bq Er ECONNRESET
+Remote host reset the connection request.

 .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
 .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 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 EIO
+An I/O error occurred while reading from or writing to the file system.
+.\" ==========
+.It Bq Er ELOOP
+Too many symbolic links were encountered in translating the pathname.
+This is taken to be indicative of a looping symbolic link.
+.\" ==========

 .It Bq Er ENAMETOOLONG
 A component of a pathname exceeded 
 .Dv {NAME_MAX}
 characters, or an entire path name exceeded 
 .Dv {PATH_MAX}
 characters.
 .It Bq Er ENAMETOOLONG
 A component of a pathname exceeded 
 .Dv {NAME_MAX}
 characters, or an entire path name exceeded 
 .Dv {PATH_MAX}
 characters.

+.\" ==========

 .It Bq Er ENOENT
 The named socket does not exist.
 .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 ENOTDIR
+A component of the path prefix is not a directory.

 .El
 .El

+.Sh LEGACY SYNOPSIS
+.Fd #include <sys/types.h>
+.Fd #include <sys/socket.h>
+.Pp
+The include file
+.In sys/types.h
+is necessary.

 .Sh SEE ALSO
 .Xr accept 2 ,
 .Sh SEE ALSO
 .Xr accept 2 ,

+.Xr connectx 2 ,
+.Xr disconnectx 2 ,
+.Xr getsockname 2 ,

 .Xr select 2 ,
 .Xr socket 2 ,
 .Xr select 2 ,
 .Xr socket 2 ,

-.Xr getsockname 2
+.Xr compat 5

 .Sh HISTORY
 The
 .Fn connect
 .Sh HISTORY
 The
 .Fn connect