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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 4.09 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/.



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