Manpage of GETSOCKNAME

GETSOCKNAME

Section: Linux Programmer's Manual (2)
Updated: 2016-03-15
Index
 

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 sockfdis bound, in the buffer pointed to by addr. The addrlenargument 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, addrlenwill return a value greater than was supplied to the call.  

RETURN VALUE

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

ERRORS

EBADF
The argument sockfdis not a valid file descriptor.
EFAULT
The addrargument points to memory not in a valid part of the process address space.
EINVAL
addrlenis invalid (e.g., is negative).
ENOBUFS
Insufficient resources were available in the system to perform the operation.
ENOTSOCK
The file descriptor sockfddoes not refer to a socket.
 

CONFORMING TO

POSIX.1-2001, POSIX.1-2008, SVr4, 4.4BSD (getsockname() first appeared in 4.2BSD).  

NOTES

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


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO
NOTES
SEE ALSO

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Time: 22:27:41 GMT, June 20, 2016