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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 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 argument sockfd is a file, not a socket.

CONFORMING TO
       SVr4, 4.4BSD (the getsockname() function call appeared in 4.2BSD), POSIX.1-2001.

NOTES
       The third argument of getsockname() is in reality an int * (and this is what 4.x BSD and libc4 and libc5 have).
       Some POSIX confusion resulted in the present socklen_t, also used by glibc.  See also accept(2).

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

COLOPHON
       This  page  is part of release 3.22 of the Linux man-pages project.  A description of the project, and informa-
       tion about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.



Linux                             2008-12-03                    GETSOCKNAME(2)