/*
* Initialize timezone library
*
* This is called after initial loading of postgresql.conf. If no TimeZone
* setting was found therein, we try to derive one from the environment.
* Likewise for log_timezone.
*/
void
pg_timezone_initialize(void)
{
pg_tz *def_tz = NULL;
/* Do we need to try to figure the session timezone? */
if (pg_strcasecmp(GetConfigOption("timezone", false), "UNKNOWN") == 0)
{
/* Select setting */
def_tz = select_default_timezone();
session_timezone = def_tz;
/* Tell GUC about the value. Will redundantly call pg_tzset() */
SetConfigOption("timezone", pg_get_timezone_name(def_tz),
PGC_POSTMASTER, PGC_S_ARGV);
}
/* What about the log timezone? */
if (pg_strcasecmp(GetConfigOption("log_timezone", false), "UNKNOWN") == 0)
{
/* Select setting, but don't duplicate work */
if (!def_tz)
def_tz = select_default_timezone();
log_timezone = def_tz;
/* Tell GUC about the value. Will redundantly call pg_tzset() */
SetConfigOption("log_timezone", pg_get_timezone_name(def_tz),
PGC_POSTMASTER, PGC_S_ARGV);
}
}
/*
* Initialize timezone library
*
* This is called after initial loading of postgresql.conf. If no TimeZone
* setting was found therein, we try to derive one from the environment.
* Likewise for log_timezone.
*
* Note: this is also called from process_config_file, to re-establish valid
* GUC settings if the GUCs have been reset to default following their
* removal from postgresql.conf.
*/
void
pg_timezone_initialize(void)
{
pg_tz* def_tz = NULL;
/*
* Make sure that session_timezone and log_timezone are set.
* (session_timezone could still be NULL even if a timezone value was set
* in postgresql.conf, if that setting was interval-based rather than
* timezone-based.)
*/
if (!session_timezone) {
def_tz = select_default_timezone();
session_timezone = def_tz;
}
if (!log_timezone) {
/* Don't duplicate work */
if (!def_tz)
def_tz = select_default_timezone();
log_timezone = def_tz;
}
/*
* Now, set the timezone and log_timezone GUCs if they're still default.
* (This will redundantly call pg_tzset().)
*
* We choose to label these values PGC_S_ENV_VAR, rather than
* PGC_S_DYNAMIC_DEFAULT which would be functionally equivalent, because
* they came either from getenv("TZ") or from libc behavior that's
* determined by process environment of some kind.
*
* Note: in the case where a setting has just been removed from
* postgresql.conf, this code will not do what you might expect, namely
* call select_default_timezone() and install that value as the setting.
* Rather, the previously active setting --- typically the one from
* postgresql.conf --- will be reinstalled, relabeled as PGC_S_ENV_VAR. If
* we did try to install the "correct" default value, the effect would be
* that each postmaster child would independently run an extremely
* expensive search of the timezone database, bringing the database to its
* knees for possibly multiple seconds. This is so unpleasant, and could
* so easily be triggered quite unintentionally, that it seems better to
* violate the principle of least astonishment.
*/
if (reset_guc_opt("timezone") == NULL)
set_option("timezone",
pg_get_timezone_name(session_timezone),
PGC_POSTMASTER,
PGC_S_ENV_VAR);
if (reset_guc_opt("log_timezone") == NULL)
set_option("log_timezone",
pg_get_timezone_name(log_timezone),
PGC_POSTMASTER,
PGC_S_ENV_VAR);
}
/*
* Initialize timezone library
*
* This is called after initial loading of postgresql.conf. If no TimeZone
* setting was found therein, we try to derive one from the environment.
* Likewise for log_timezone.
*/
void
pg_timezone_initialize(void)
{
pg_tz *def_tz = NULL;
/*
* Make sure that session_timezone and log_timezone are set.
* (session_timezone could still be NULL even if a timezone value was set
* in postgresql.conf, if that setting was interval-based rather than
* timezone-based.)
*/
if (!session_timezone)
{
def_tz = select_default_timezone();
session_timezone = def_tz;
}
if (!log_timezone)
{
/* Don't duplicate work */
if (!def_tz)
def_tz = select_default_timezone();
log_timezone = def_tz;
}
/* Now, set the timezone GUC if it's not already set */
if (GetConfigOption("timezone", false) == NULL)
{
/* Tell GUC about the value. Will redundantly call pg_tzset() */
SetConfigOption("timezone", pg_get_timezone_name(session_timezone),
PGC_POSTMASTER, PGC_S_ENV_VAR);
}
/* Likewise for log timezone */
if (GetConfigOption("log_timezone", false) == NULL)
{
/* Tell GUC about the value. Will redundantly call pg_tzset() */
SetConfigOption("log_timezone", pg_get_timezone_name(log_timezone),
PGC_POSTMASTER, PGC_S_ENV_VAR);
}
}
/*
* Initialize timezone library
*
* This is called after initial loading of postgresql.conf. If no TimeZone
* setting was found therein, we try to derive one from the environment.
*/
void
pg_timezone_initialize(void)
{
/* Do we need to try to figure the timezone? */
if (pg_strcasecmp(GetConfigOption("timezone"), "UNKNOWN") == 0)
{
const char *def_tz;
/* Select setting */
def_tz = select_default_timezone();
/* Tell GUC about the value. Will redundantly call pg_tzset() */
SetConfigOption("timezone", def_tz, PGC_POSTMASTER, PGC_S_ARGV);
}
}