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>CONNECT(2)                    System Calls Manual                   CONNECT(2)
 
NAME
     connect - initiate a connection on a socket
 
SYNOPSIS
     #include &lt;sys/types.h&#62;
     #include &lt;sys/socket.h&#62;
 
     int
     connect(int s, const struct sockaddr *name, socklen_t namelen);
 
DESCRIPTION
     The parameter s is a socket.  If it is of type 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
     SOCK_STREAM, this call attempts to make a connection to another socket.
     The other socket is specified by name, which is an address in the commu-
     nications space of the socket.  Each communications space interprets the
     name parameter in its own way.  Generally, stream sockets may success-
     fully connect() only once; datagram sockets may use connect() multiple
     times to change their association.  Datagram sockets may dissolve the
     association by connecting to an invalid address, such as a null address.
 
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 errno.
 
ERRORS
     The connect() call fails if:
 
     [EBADF]            S is not a valid descriptor.
 
     [ENOTSOCK]         S is a descriptor for a file, not a socket.
 
     [EADDRNOTAVAIL]    The specified address is not available on this
                        machine.
 
     [EAFNOSUPPORT]     Addresses in the specified address family cannot be
                        used with this socket.
 
     [EISCONN]          The socket is already connected.
 
     [ETIMEDOUT]        Connection establishment timed out without establish-
                        ing a connection.
 
     [EINVAL]           A TCP connection with a local broadcast, the all-ones
                        or a multicast address as the peer was attempted.
 
     [ECONNREFUSED]     The attempt to connect was forcefully rejected.
 
     [EINTR]            A connect was interrupted before it succeeded by the
                        delivery of a signal.
 
     [ENETUNREACH]      The network isn't reachable from this host.
 
     [EADDRINUSE]       The address is already in use.
 
     [EFAULT]           The name parameter specifies an area outside the pro-
                        cess address space.
 
     [EINPROGRESS]      The socket is non-blocking and the connection cannot
                        be completed immediately.  It is possible to select(2)
                        or poll(2) for completion by selecting the socket for
                        writing, and also use getsockopt(2) with SO_ERROR to
                        check for error conditions.
 
     [EALREADY]         The socket is non-blocking and a previous connection
                        attempt has not yet been completed.
 
     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.
 
     [ENOTDIR]          A component of the path prefix is not a directory.
 
     [ENAMETOOLONG]     A component of a pathname exceeded {NAME_MAX} charac-
                        ters, or an entire path name exceeded {PATH_MAX} char-
                        acters.
 
     [ENOENT]           The named socket does not exist.
 
     [EACCES]           Search permission is denied for a component of the
                        path prefix.
 
     [EACCES]           Write access to the named socket is denied.
 
     [ELOOP]            Too many symbolic links were encountered in translat-
                        ing the pathname.
 
SEE ALSO
     accept(2), getsockname(2), getsockopt(2), poll(2), select(2), socket(2)
 
HISTORY
     The connect() function call appeared in 4.2BSD.
 
BSD                            February 15, 1999                           BSD
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1	28	unneback	`<!-- Copyright (C) 2003 Red Hat, Inc. -->`
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85			`NAME="NET-COMMON-TCPIP-MANPAGES-CONNECT">connect</H1`
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94			`>CONNECT(2) System Calls Manual CONNECT(2)`
95
96			`NAME`
97			`connect - initiate a connection on a socket`
98
99			`SYNOPSIS`
100			`#include <sys/types.h>`
101			`#include <sys/socket.h>`
102
103			`int`
104			`connect(int s, const struct sockaddr *name, socklen_t namelen);`
105
106			`DESCRIPTION`
107			`The parameter s is a socket. If it is of type SOCK_DGRAM, this call`
108			`specifies the peer with which the socket is to be associated; this`
109			`address is that to which datagrams are to be sent, and the only address`
110			`from which datagrams are to be received. If the socket is of type`
111			`SOCK_STREAM, this call attempts to make a connection to another socket.`
112			`The other socket is specified by name, which is an address in the commu-`
113			`nications space of the socket. Each communications space interprets the`
114			`name parameter in its own way. Generally, stream sockets may success-`
115			`fully connect() only once; datagram sockets may use connect() multiple`
116			`times to change their association. Datagram sockets may dissolve the`
117			`association by connecting to an invalid address, such as a null address.`
118
119			`RETURN VALUES`
120			`If the connection or binding succeeds, 0 is returned. Otherwise a -1 is`
121			`returned, and a more specific error code is stored in errno.`
122
123			`ERRORS`
124			`The connect() call fails if:`
125
126			`[EBADF] S is not a valid descriptor.`
127
128			`[ENOTSOCK] S is a descriptor for a file, not a socket.`
129
130			`[EADDRNOTAVAIL] The specified address is not available on this`
131			`machine.`
132
133			`[EAFNOSUPPORT] Addresses in the specified address family cannot be`
134			`used with this socket.`
135
136			`[EISCONN] The socket is already connected.`
137
138			`[ETIMEDOUT] Connection establishment timed out without establish-`
139			`ing a connection.`
140
141			`[EINVAL] A TCP connection with a local broadcast, the all-ones`
142			`or a multicast address as the peer was attempted.`
143
144			`[ECONNREFUSED] The attempt to connect was forcefully rejected.`
145
146			`[EINTR] A connect was interrupted before it succeeded by the`
147			`delivery of a signal.`
148
149			`[ENETUNREACH] The network isn't reachable from this host.`
150
151			`[EADDRINUSE] The address is already in use.`
152
153			`[EFAULT] The name parameter specifies an area outside the pro-`
154			`cess address space.`
155
156			`[EINPROGRESS] The socket is non-blocking and the connection cannot`
157			`be completed immediately. It is possible to select(2)`
158			`or poll(2) for completion by selecting the socket for`
159			`writing, and also use getsockopt(2) with SO_ERROR to`
160			`check for error conditions.`
161
162			`[EALREADY] The socket is non-blocking and a previous connection`
163			`attempt has not yet been completed.`
164
165			`The following errors are specific to connecting names in the UNIX domain.`
166			`These errors may not apply in future versions of the UNIX IPC domain.`
167
168			`[ENOTDIR] A component of the path prefix is not a directory.`
169
170			`[ENAMETOOLONG] A component of a pathname exceeded {NAME_MAX} charac-`
171			`ters, or an entire path name exceeded {PATH_MAX} char-`
172			`acters.`
173
174			`[ENOENT] The named socket does not exist.`
175
176			`[EACCES] Search permission is denied for a component of the`
177			`path prefix.`
178
179			`[EACCES] Write access to the named socket is denied.`
180
181			`[ELOOP] Too many symbolic links were encountered in translat-`
182			`ing the pathname.`
183
184			`SEE ALSO`
185			`accept(2), getsockname(2), getsockopt(2), poll(2), select(2), socket(2)`
186
187			`HISTORY`
188			`The connect() function call appeared in 4.2BSD.`
189
190			`BSD February 15, 1999 BSD`
191			`</PRE`
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