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55527368bd
It seems potentially useful to label our shared libraries with version information, now that a facility exists for retrieving that. This patch labels them with the PG_VERSION string. There was some discussion about using semantic versioning conventions, but that doesn't seem terribly helpful for modules with no SQL-level presence; and for those that do have SQL objects, we typically expect them to support multiple revisions of the SQL definitions, so it'd still not be very helpful. I did not label any of src/test/modules/. It seems unnecessary since we don't install those, and besides there ought to be someplace that still provides test coverage for the original PG_MODULE_MAGIC macro. Author: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/dd4d1b59-d0fe-49d5-b28f-1e463b68fa32@gmail.com
76 lines
1.5 KiB
C
76 lines
1.5 KiB
C
/* -------------------------------------------------------------------------
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*
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* auth_delay.c
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*
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* Copyright (c) 2010-2025, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* contrib/auth_delay/auth_delay.c
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*
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* -------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include <limits.h>
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#include "libpq/auth.h"
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#include "utils/guc.h"
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PG_MODULE_MAGIC_EXT(
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.name = "auth_delay",
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.version = PG_VERSION
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);
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/* GUC Variables */
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static int auth_delay_milliseconds = 0;
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/* Original Hook */
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static ClientAuthentication_hook_type original_client_auth_hook = NULL;
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/*
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* Check authentication
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*/
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static void
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auth_delay_checks(Port *port, int status)
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{
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/*
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* Any other plugins which use ClientAuthentication_hook.
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*/
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if (original_client_auth_hook)
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original_client_auth_hook(port, status);
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/*
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* Inject a short delay if authentication failed.
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*/
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if (status != STATUS_OK)
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{
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pg_usleep(1000L * auth_delay_milliseconds);
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}
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}
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/*
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* Module Load Callback
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*/
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void
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_PG_init(void)
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{
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/* Define custom GUC variables */
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DefineCustomIntVariable("auth_delay.milliseconds",
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"Milliseconds to delay before reporting authentication failure",
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NULL,
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&auth_delay_milliseconds,
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0,
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0, INT_MAX / 1000,
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PGC_SIGHUP,
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GUC_UNIT_MS,
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NULL,
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NULL,
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NULL);
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MarkGUCPrefixReserved("auth_delay");
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/* Install Hooks */
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original_client_auth_hook = ClientAuthentication_hook;
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ClientAuthentication_hook = auth_delay_checks;
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}
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