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getsockopt() - sys/socket.h

getsockopt - get the socket options.
The getsockopt() function retrieves the value for the option specified by the option_name argument for the socket specified by the socket argument. If the size of the option value is greater than option_len, the value stored in the object pointed to by the option_value argument will be silently truncated. Otherwise, the object pointed to by the option_len argument will be modified to indicate the actual length of the value.


int getsockopt(int socket, int level, int option_name, 
     void *option_value, socklen_t *option_len);


Output / Return Value

Upon successful completion, getsockopt() returns 0. Otherwise, -1 is returned and errno is set to indicate the error.


Available only for Unix/Linux.

Alternatives / See Also