PROLOG

       This  manual  page  is part of the POSIX Programmer's Manual.  The Linux implementation of
       this interface may differ (consult the corresponding Linux  manual  page  for  details  of
       Linux behavior), or the interface may not be implemented on Linux.

NAME

       getsockname — get the socket name

SYNOPSIS

       #include <sys/socket.h>

       int getsockname(int socket, struct sockaddr *restrict address,
           socklen_t *restrict address_len);

DESCRIPTION

       The  getsockname() function shall retrieve the locally-bound name of the specified socket,
       store this address in the sockaddr structure pointed to by the address argument, and store
       the length of this address in the object pointed to by the address_len argument.

       The  address_len argument points to a socklen_t object which on input specifies the length
       of the supplied sockaddr structure, and on output  specifies  the  length  of  the  stored
       address.   If  the actual length of the address is greater than the length of the supplied
       sockaddr structure, the stored address shall be truncated.

       If the socket has not been bound to a local name, the value stored in the  object  pointed
       to by address is unspecified.

RETURN VALUE

       Upon  successful  completion, 0 shall be returned, the address argument shall point to the
       address of the socket, and the address_len argument shall  point  to  the  length  of  the
       address. Otherwise, -1 shall be returned and errno set to indicate the error.

ERRORS

       The getsockname() function shall fail if:

       EBADF  The socket argument is not a valid file descriptor.

       ENOTSOCK
              The socket argument does not refer to a socket.

       EOPNOTSUPP
              The operation is not supported for this socket's protocol.

       The getsockname() function may fail if:

       EINVAL The socket has been shut down.

       ENOBUFS
              Insufficient resources were available in the system to complete the function.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       accept(), bind(), getpeername(), socket()

       The Base Definitions volume of POSIX.1‐2017, <sys_socket.h>

COPYRIGHT

       Portions  of  this  text  are  reprinted  and  reproduced in electronic form from IEEE Std
       1003.1-2017, Standard for Information Technology -- Portable  Operating  System  Interface
       (POSIX),  The  Open Group Base Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by
       the Institute of Electrical and Electronics Engineers, Inc and The  Open  Group.   In  the
       event  of  any  discrepancy  between this version and the original IEEE and The Open Group
       Standard, the original IEEE and The Open Group  Standard  is  the  referee  document.  The
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

       Any  typographical  or  formatting errors that appear in this page are most likely to have
       been introduced during the conversion of the source files to man page  format.  To  report
       such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .