getsockname man page on Archlinux

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

       getsockname - get socket name

       #include <sys/socket.h>

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

       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.

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

       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).

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

	      The argument sockfd is a file, not a socket.

       SVr4,  4.4BSD  (the  getsockname()  function  call appeared in 4.2BSD),

       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).

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

       This page is part of release 3.65 of the Linux  man-pages  project.   A
       description  of	the project, and information about reporting bugs, can
       be found at

Linux				  2008-12-03			GETSOCKNAME(2)

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