golden hour

/usr/include/mysql/server/mysql

File/Folder	Size	Actions
auth_dialog_client.h	2.01 KB
client_plugin.h	6.18 KB
plugin.h	28.69 KB
plugin_audit.h	5.41 KB
plugin_auth.h	5.27 KB
plugin_auth_common.h	4.4 KB
plugin_data_type.h	1.27 KB
plugin_encryption.h	4.33 KB
plugin_ftparser.h	7.65 KB
plugin_function.h	1.4 KB
plugin_password_validation.h	1.52 KB
psi	-
service_base64.h	2.86 KB
service_debug_sync.h	13.18 KB
service_encryption.h	5.52 KB
service_encryption_scheme.h	5.51 KB
service_json.h	4.44 KB
service_kill_statement.h	2.02 KB
service_logger.h	3.47 KB
service_md5.h	2.07 KB
service_my_crypt.h	4.07 KB
service_my_print_error.h	2.27 KB
service_my_snprintf.h	3.63 KB
service_print_check_msg.h	1.52 KB
service_progress_report.h	3.28 KB
service_sha1.h	2.11 KB
service_sha2.h	5.17 KB
service_sql.h	4.57 KB
service_thd_alloc.h	4.38 KB
service_thd_autoinc.h	1.65 KB
service_thd_error_context.h	3.34 KB
service_thd_mdl.h	1.25 KB
service_thd_rnd.h	1.86 KB
service_thd_specifics.h	3.6 KB
service_thd_timezone.h	2.24 KB
service_thd_wait.h	3.61 KB
service_wsrep.h	13.04 KB
services.h	1.72 KB

Edit: service_my_print_error.h

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335  USA */

#ifndef MYSQL_SERVICE_MY_PRINT_ERROR_INCLUDED
#define MYSQL_SERVICE_MY_PRINT_ERROR_INCLUDED

/**
  @file include/mysql/service_my_print_error.h

This service provides functions for plugins to report
  errors to client (without client, the errors are written to the error log).

*/
#ifdef __cplusplus
extern "C" {
#endif

#ifndef MYSQL_ABI_CHECK
#include <stdarg.h>
#include <stdlib.h>
#endif

#define ME_ERROR_LOG        64 /* Write the message to the error log */
#define ME_ERROR_LOG_ONLY  128 /* Write the error message to error log only */
#define ME_NOTE           1024 /* Not an error, just a note */
#define ME_WARNING        2048 /* Not an error, just a warning */
#define ME_FATAL          4096 /* Fatal statement error */

extern struct my_print_error_service_st {
  void (*my_error_func)(unsigned int nr, unsigned long MyFlags, ...);
  void (*my_printf_error_func)(unsigned int nr, const char *fmt, unsigned long MyFlags,...);
  void (*my_printv_error_func)(unsigned int error, const char *format, unsigned long MyFlags, va_list ap);
} *my_print_error_service;

#ifdef MYSQL_DYNAMIC_PLUGIN

#define my_error my_print_error_service->my_error_func
#define my_printf_error my_print_error_service->my_printf_error_func
#define my_printv_error(A,B,C,D) my_print_error_service->my_printv_error_func(A,B,C,D)

#else
extern void my_error(unsigned int nr, unsigned long MyFlags, ...);
extern void my_printf_error(unsigned int my_err, const char *format, unsigned long MyFlags, ...);
extern void my_printv_error(unsigned int error, const char *format, unsigned long MyFlags,va_list ap);
#endif /* MYSQL_DYNAMIC_PLUGIN */

#ifdef __cplusplus
}
#endif

#endif