In addition to Weibo, there is also WeChat
Please pay attention
WeChat public account
Shulou
2025-09-22 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Database >
Share
Shulou(Shulou.com)06/01 Report--
Internal_load_library postgresql- > PG_init = (PG_init_t) pg_dlsym (file_scanner- > handle, "_ PG_init"); if (PG_init) (* PG_init) (); internal_unload_library (const char * libname)-> PG_fini = (PG_fini_t) pg_dlsym (file_scanner- > handle, "_ PG_fini") If (PG_fini) (* PG_fini) (); take ClientAuthentication_hook_type as an example auth.h:// declares the function used by the plug-in extern void ClientAuthentication (Port * port); / * Hook for plugins to get control in ClientAuthentication () * / typedef void (* ClientAuthentication_hook_type) (Port *, int); extern PGDLLIMPORT ClientAuthentication_hook_type ClientAuthentication_hook The auth.c:// global variable is initialized to NULL, and the initialization assignment is made in the _ PG_init function. If the plug-in is loaded, ClientAuthentication_hook is ClientAuthentication_hook_type ClientAuthentication_hook = NULL;//. If ClientAuthentication_hook is assigned, execute the implanted code InitPostgres- > PerformAuthentication- > ClientAuthentication- > if (ClientAuthentication_hook) (* ClientAuthentication_hook) (port, status); auth_delay.c:static ClientAuthentication_hook_type original_client_auth_hook = NULL / * * Module Load Callback * / void _ PG_init (void) {/ * Define custom GUC variables * / DefineCustomIntVariable ("auth_delay.milliseconds", "Milliseconds to delay before reporting authentication failure", NULL, & auth_delay_milliseconds, 0 0, INT_MAX / 1000, PGC_SIGHUP, GUC_UNIT_MS, NULL, NULL, NULL) / * Install Hooks * / original_client_auth_hook = ClientAuthentication_hook; ClientAuthentication_hook= auth_delay_checks;} / * this function is called if uninstalled, which actually assigns ClientAuthentication_hook back to the original value * / void_PG_fini (void) {ClientAuthentication_hook=original_client_auth_hook } / * * / static void auth_delay_checks (Port * port, int status) {if (original_client_auth_hook) original_client_auth_hook (port, status); if (status! = STATUS_OK) {pg_usleep (1000L * auth_delay_milliseconds);}}
Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.
Views: 0
*The comments in the above article only represent the author's personal views and do not represent the views and positions of this website. If you have more insights, please feel free to contribute and share.
The market share of Chrome browser on the desktop has exceeded 70%, and users are complaining about
The world's first 2nm mobile chip: Samsung Exynos 2600 is ready for mass production.According to a r
A US federal judge has ruled that Google can keep its Chrome browser, but it will be prohibited from
Continue with the installation of the previous hadoop.First, install zookooper1. Decompress zookoope
About us Contact us Product review car news thenatureplanet
More Form oMedia: AutoTimes. Bestcoffee. SL News. Jarebook. Coffee Hunters. Sundaily. Modezone. NNB. Coffee. Game News. FrontStreet. GGAMEN
© 2024 shulou.com SLNews company. All rights reserved.