GETSOCKOPT 2
NAME
getsockopt - get the value of a socket option.
SYNOPSIS
#include <sys/socket.h>
int getsockopt(int sd, int level, int opt_name, void * opt_val, socklen_t * opt_len);
DESCRIPTION
getsockopt() provides an interface to get the value of a specific
option, referenced by opt_name, for a given socket descriptor
sd.
RETURN VALUES
On success, this function returns 0. On error, -1 is returned and
errno is set.
ERRORS
15 [ENOSYS] The option opt_name is not available/supported at the level specified for the socket sd.
15 [ENOTSOCK] sd is not a socket descriptor.
SEE ALSO
socket(2), socketpair(2), setsockopt(2)