getsockname

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 5.08 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)