getdns_context_set_context_update_callback3
Usage
#include <getdns.h>
getdns_return_t
getdns_context_set_context_update_callback (getdns_context ** context,
void (*cbfun)(getdns_context *context, getdns_context_code_t changed_item)
Library
DNS Resolver library (libgetdns, -lgetdns)
Overview
Changes to the context such as in response to system files that affect the contet (/etc/resolv.conf etc.) trigger a call to the callback function specified as cbfun
context a previously initialized context
cbfun callback function to invoked when the specified context changes. If this argument is NULL then updates to the context will not invoke a callback.
Return values
Upon successful completion each of these functions return GETDNS_RETURN_GOOD , otherwise the following error values are returned:
GETDNS_RETURN_GENERIC_ERROR memory allocation failed or some other untoward thing happened
GETDNS_RETURN_BAD_CONTEXT if the context pointer is invalid
Examples
TBD
Releases
6 releases since Debian 9 (Stretch); the text changed 3 times.