Set authentication hook for database connections

Register a function to be called when a database connection fails. This is useful for refreshing Kerberos tickets or other authentication credentials before retrying the connection.

csdb_set_auth_hook(hook)

Arguments

hook

A function with no arguments that performs authentication, or NULL to clear the hook.

Value

Invisibly returns the previous hook (if any).

Examples

if (FALSE) { # \dontrun{
# Set an auth hook to refresh Kerberos credentials
csdb_set_auth_hook(function() {
  system2("/bin/authenticate.sh", stdout = NULL)
})

# Clear the hook
csdb_set_auth_hook(NULL)
} # }