sasl_client_init man page
sasl_client_init — SASL client authentication initialization
#include <sasl/sasl.h> int sasl_client_init(const sasl_callback_t *callbacks);
sasl_client_init() initializes SASL. It must be called before any calls to sasl_client_start. This call initializes all SASL client drivers (e.g. authentication mechanisms). These are usually found in the /usr/lib/sasl2 directory but the directory may be overridden with the SASL_PATH environment variable.
callbacks specifies the base callbacks for all client connections. See the sasl_callbacks man page for more information
sasl_client_init returns an integer which corresponds to one of the following codes. SASL_OK is the only one that indicates success. All others indicate errors and should either be handled or the authentication session should be quit.
Mechanism version mismatch
Error in config file
Not enough memory to complete operation
sasl(3), sasl_callbacks(3), sasl_client_new(3), sasl_client_start(3), sasl_client_step(3)
sasl(3), sasl_client_new(3), sasl_client_start(3), sasl_client_step(3), sasl_done(3), sasl_global_listmech(3).