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NAME

     getpeername — get name of connected peer

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <sys/types.h>
     #include <sys/socket.h>

     int
     getpeername(int s, struct sockaddr * restrict name, socklen_t * restrict namelen);

DESCRIPTION

     The getpeername() system call returns the name of the peer connected to socket s.  The
     namelen argument should be initialized to indicate the amount of space pointed to by name.
     On return it contains the actual size of the name returned (in bytes).  The name is
     truncated if the buffer provided is too small.

RETURN VALUES

     The getpeername() function returns the value 0 if successful; otherwise the value -1 is
     returned and the global variable errno is set to indicate the error.

ERRORS

     The call succeeds unless:

     [EBADF]            The argument s is not a valid descriptor.

     [ECONNRESET]       The connection has been reset by the peer.

     [ENOTSOCK]         The argument s is a file, not a socket.

     [ENOTCONN]         The socket is not connected.

     [ENOBUFS]          Insufficient resources were available in the system to perform the
                        operation.

     [EFAULT]           The name argument points to memory not in a valid part of the process
                        address space.

SEE ALSO

     accept(2), bind(2), getsockname(2), socket(2)

HISTORY

     The getpeername() system call appeared in 4.2BSD.