GETSOCKNAME(2) Linux Programmer s Manual GETSOCKNAME(2)
NAME getsockname - get socket name
SYNOPSIS #include <sys/socket.h>
int getsockname(int s, struct sockaddr *name, socklen_t *namelen);
DESCRIPTION getsockname() returns the current name for the specified socket. The namelen parameter should be initialized to indicate the amount of space pointed to by name. On return it contains the actual size of the name returned (in bytes).
RETURN VALUE On success, zero is returned. On error, -1 is returned, and errno is set appropriately.
ERRORS EBADF The argument s is not a valid descriptor.
EFAULT The name parameter points to memory not in a valid part of the process address space.
EINVAL namelen is invalid (e.g., is negative).
ENOBUFS Insufficient resources were available in the system to perform the operation.
ENOTSOCK The argument s is a file, not a socket.
CONFORMING TO SVr4, 4.4BSD (the getsockname() function call appeared in 4.2BSD), POSIX.1-2001.
NOTE 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)
BSD Man Page 1993-07-24 GETSOCKNAME(2)