| NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | CONFORMING TO | NOTES | SEE ALSO | COLOPHON | The Linux Programming Interface |
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).
ENOBUFS
Insufficient resources were available in the system to perform the
operation.
ENOTSOCK
The argument sockfd is a file, not a socket.
SVr4, 4.4BSD (the getsockname() function call appeared in 4.2BSD),
POSIX.1-2001.
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 3.32 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can be found
at http://www.kernel.org/doc/man-pages/.
Linux 2008-12-03 GETSOCKNAME(2)
HTML rendering created 2010-12-03 by Michael Kerrisk, author of The Linux Programming Interface