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GETSOCKNAME(2) Linux Programmer's Manual GETSOCKNAME(2)

NAME

     getsockname - get socket name

SYNOPSIS

     #include <sys/socket.h>

     int getsockname(int sockfd, struct sockaddr *addr, socklen_t *addrlen);

DESCRIPTION

     getsockname() returns the current address to which the socket sockfd is
     bound, in the buffer pointed to by addr.  The addrlen  argument  should
     be initialized to indicate the amount of space (in bytes) pointed to by
     addr.  On return it contains the actual size of the socket address.

     The returned address is truncated if the buffer provided is too  small;
     in  this case, addrlen will return a value greater than was supplied to
     the call.

RETURN VALUE

     On success, zero is returned.  On error, -1 is returned, and  errno  is
     set appropriately.

ERRORS

     EBADF  The argument sockfd is not a valid file descriptor.

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

     EINVAL addrlen is invalid (e.g., is negative).

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

     ENOTSOCK
            The file descriptor sockfd does not refer to a socket.

CONFORMING TO

     POSIX.1-2001,  POSIX.1-2008, SVr4, 4.4BSD (getsockname() first appeared
     in 4.2BSD).

NOTES

     For background on the socklen_t type, see accept(2).

SEE ALSO

     bind(2), socket(2), getifaddrs(3), ip(7), socket(7), unix(7)

COLOPHON

     This page is part of release 4.16 of the Linux  man-pages  project.   A
     description  of  the project, information about reporting bugs, and the
     latest    version    of    this    page,    can     be     found     at
     https://www.kernel.org/doc/man-pages/.

Linux 2017-09-15 GETSOCKNAME(2)