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write_nondefault_variables must take care to write custom_variable_classes

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first; otherwise backends reading the file might reject values of custom
variables.  Per experimentation with auto_explain.
This commit is contained in:
Tom Lane
2009-01-02 02:02:10 +00:00
parent ccdb6627ee
commit bdcc7576f4
1 changed files with 76 additions and 59 deletions
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83
src/backend/utils/misc/guc.c
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@ -10,7 +10,7 @@
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.485 2009/01/02 01:16:02 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.486 2009/01/02 02:02:10 tgl Exp $
*
*--------------------------------------------------------------------
*/
@ -6677,43 +6677,19 @@ is_newvalue_equal(struct config_generic * record, const char *newvalue)
#ifdef EXEC_BACKEND
/*
* This routine dumps out all non-default GUC options into a binary
* These routines dump out all non-default GUC options into a binary
* file that is read by all exec'ed backends. The format is:
*
* variable name, string, null terminated
* variable value, string, null terminated
* variable source, integer
*/
void
write_nondefault_variables(GucContext context)
static void
write_one_nondefault_variable(FILE *fp, struct config_generic *gconf)
{
int i;
int elevel;
FILE *fp;
Assert(context == PGC_POSTMASTER || context == PGC_SIGHUP);
elevel = (context == PGC_SIGHUP) ? LOG : ERROR;
/*
* Open file
*/
fp = AllocateFile(CONFIG_EXEC_PARAMS_NEW, "w");
if (!fp)
{
ereport(elevel,
(errcode_for_file_access(),
errmsg("could not write to file \"%s\": %m",
CONFIG_EXEC_PARAMS_NEW)));
if (gconf->source == PGC_S_DEFAULT)
return;
}
for (i = 0; i < num_guc_variables; i++)
{
struct config_generic *gconf = guc_variables[i];
if (gconf->source != PGC_S_DEFAULT)
{
fprintf(fp, "%s", gconf->name);
fputc(0, fp);
@ -6723,10 +6699,10 @@ write_nondefault_variables(GucContext context)
{
struct config_bool *conf = (struct config_bool *) gconf;
if (*conf->variable == 0)
fprintf(fp, "false");
else
if (*conf->variable)
fprintf(fp, "true");
else
fprintf(fp, "false");
}
break;
@ -6759,7 +6735,8 @@ write_nondefault_variables(GucContext context)
{
struct config_enum *conf = (struct config_enum *) gconf;
fprintf(fp, "%s", config_enum_lookup_by_value(conf, *conf->variable));
fprintf(fp, "%s",
config_enum_lookup_by_value(conf, *conf->variable));
}
break;
}
@ -6767,7 +6744,47 @@ write_nondefault_variables(GucContext context)
fputc(0, fp);
fwrite(&gconf->source, sizeof(gconf->source), 1, fp);
}
void
write_nondefault_variables(GucContext context)
{
int elevel;
FILE *fp;
struct config_generic *cvc_conf;
int i;
Assert(context == PGC_POSTMASTER || context == PGC_SIGHUP);
elevel = (context == PGC_SIGHUP) ? LOG : ERROR;
/*
* Open file
*/
fp = AllocateFile(CONFIG_EXEC_PARAMS_NEW, "w");
if (!fp)
{
ereport(elevel,
(errcode_for_file_access(),
errmsg("could not write to file \"%s\": %m",
CONFIG_EXEC_PARAMS_NEW)));
return;
}
/*
* custom_variable_classes must be written out first; otherwise we might
* reject custom variable values while reading the file.
*/
cvc_conf = find_option("custom_variable_classes", false, ERROR);
if (cvc_conf)
write_one_nondefault_variable(fp, cvc_conf);
for (i = 0; i < num_guc_variables; i++)
{
struct config_generic *gconf = guc_variables[i];
if (gconf != cvc_conf)
write_one_nondefault_variable(fp, gconf);
}
if (FreeFile(fp))