Provided by: manpages-dev_2.17-1_all
getpeername - get name of connected peer socket
int getpeername(int s, struct sockaddr *name, socklen_t *namelen);
Getpeername returns the name of the peer connected to socket s. 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). The name is truncated if the buffer provided is
On success, zero is returned. On error, -1 is returned, and errno is
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.
Insufficient resources were available in the system to perform
The socket is not connected.
The argument s is a file, not a socket.
SVr4, 4.4BSD (the getpeername() function call first appeared in
The third argument of getpeername() 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), getsockname(2)