*
* Copyright (c) 2000-2006, PostgreSQL Global Development Group
*
- * $PostgreSQL: pgsql/src/backend/utils/misc/guc-file.l,v 1.42 2006/08/12 04:12:41 momjian Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/misc/guc-file.l,v 1.43 2006/08/13 01:30:17 momjian Exp $
*/
%{
static bool ParseConfigFile(const char *config_file, const char *calling_file,
int depth, GucContext context, int elevel,
struct name_value_pair **head_p,
- struct name_value_pair **tail_p);
+ struct name_value_pair **tail_p,
+ int *varcount);
static void free_name_value_list(struct name_value_pair * list);
static char *GUC_scanstr(const char *s);
void
ProcessConfigFile(GucContext context)
{
- int elevel;
+ int elevel, i;
struct name_value_pair *item, *head, *tail;
+ bool *apply_list = NULL;
+ int varcount = 0;
Assert(context == PGC_POSTMASTER || context == PGC_SIGHUP);
if (!ParseConfigFile(ConfigFileName, NULL,
0, context, elevel,
- &head, &tail))
+ &head, &tail, &varcount))
goto cleanup_list;
+ /* Can we allocate memory here, what about leaving here prematurely? */
+ apply_list = (bool *) palloc(sizeof(bool) * varcount);
+
/* Check if all options are valid */
- for (item = head; item; item = item->next)
+ for (item = head, i = 0; item; item = item->next, i++)
{
- if (!set_config_option(item->name, item->value, context,
- PGC_S_FILE, false, false))
+ bool isEqual, isContextOk;
+
+ if (!verify_config_option(item->name, item->value, context,
+ PGC_S_FILE, &isEqual, &isContextOk))
+ {
+ ereport(elevel,
+ (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
+ errmsg("configuration file is invalid")));
goto cleanup_list;
+ }
+
+ if (isContextOk == false)
+ {
+ apply_list[i] = false;
+ if (context == PGC_SIGHUP)
+ {
+ if (isEqual == false)
+ ereport(elevel,
+ (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
+ errmsg("parameter \"%s\" cannot be changed after server start; configuration file change ignored",
+ item->name)));
+ }
+ else
+ /* if it is boot phase, context must be valid for all
+ * configuration item. */
+ goto cleanup_list;
+ }
+ else
+ apply_list[i] = true;
}
/* If we got here all the options checked out okay, so apply them. */
- for (item = head; item; item = item->next)
- {
- set_config_option(item->name, item->value, context,
- PGC_S_FILE, false, true);
- }
+ for (item = head, i = 0; item; item = item->next, i++)
+ if (apply_list[i])
+ set_config_option(item->name, item->value, context,
+ PGC_S_FILE, false, true);
+
- cleanup_list:
+cleanup_list:
+ if (apply_list)
+ pfree(apply_list);
free_name_value_list(head);
}
ParseConfigFile(const char *config_file, const char *calling_file,
int depth, GucContext context, int elevel,
struct name_value_pair **head_p,
- struct name_value_pair **tail_p)
+ struct name_value_pair **tail_p,
+ int *varcount)
{
- bool OK = true;
- char abs_path[MAXPGPATH];
- FILE *fp;
+ bool OK = true;
+ char abs_path[MAXPGPATH];
+ FILE *fp;
YY_BUFFER_STATE lex_buffer;
- int token;
+ int token;
/*
* Reject too-deep include nesting depth. This is just a safety check
if (!ParseConfigFile(opt_value, config_file,
depth + 1, context, elevel,
- head_p, tail_p))
+ head_p, tail_p, varcount))
{
pfree(opt_name);
pfree(opt_value);
else
(*tail_p)->next = item;
*tail_p = item;
+ (*varcount)++;
}
/* break out of loop if read EOF, else loop for next line */
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.337 2006/08/12 04:12:41 momjian Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.338 2006/08/13 01:30:17 momjian Exp $
*
*--------------------------------------------------------------------
*/
* states).
*/
static void
-set_string_field(struct config_string * conf, char **field, char *newval)
+set_string_field(struct config_string *conf, char **field, char *newval)
{
char *oldval = *field;
GucStack *stack;
gen = &var->gen;
memset(var, 0, sz);
- gen->name = guc_strdup(elevel, name);
- if (gen->name == NULL)
+ if ((gen->name = guc_strdup(elevel, name)) == NULL)
{
free(var);
return NULL;
return result;
}
-
/*
- * Sets option `name' to given value. The value should be a string
- * which is going to be parsed and converted to the appropriate data
- * type. The context and source parameters indicate in which context this
- * function is being called so it can apply the access restrictions
- * properly.
- *
- * If value is NULL, set the option to its default value. If the
- * parameter changeVal is false then don't really set the option but do all
- * the checks to see if it would work.
- *
- * If there is an error (non-existing option, invalid value) then an
- * ereport(ERROR) is thrown *unless* this is called in a context where we
- * don't want to ereport (currently, startup or SIGHUP config file reread).
- * In that case we write a suitable error message via ereport(DEBUG) and
- * return false. This is working around the deficiencies in the ereport
- * mechanism, so don't blame me. In all other cases, the function
- * returns true, including cases where the input is valid but we chose
- * not to apply it because of context or source-priority considerations.
- *
- * See also SetConfigOption for an external interface.
+ * Try to parse value. Determine what is type and call related
+ * parsing function or if newval is equal to NULL, reset value
+ * to default or bootval. If the value parsed okay return true,
+ * else false.
*/
-bool
-set_config_option(const char *name, const char *value,
- GucContext context, GucSource source,
- bool isLocal, bool changeVal)
+static bool
+parse_value(int elevel, const struct config_generic *record,
+ const char *value, GucSource *source, bool changeVal,
+ union config_var_value *retval)
{
- struct config_generic *record;
- int elevel;
- bool makeDefault;
-
- if (context == PGC_SIGHUP || source == PGC_S_DEFAULT)
+ /*
+ * Evaluate value and set variable.
+ */
+ switch (record->vartype)
{
- /*
- * To avoid cluttering the log, only the postmaster bleats loudly
- * about problems with the config file.
- */
- elevel = IsUnderPostmaster ? DEBUG2 : LOG;
- }
- else if (source == PGC_S_DATABASE || source == PGC_S_USER)
- elevel = INFO;
- else
- elevel = ERROR;
+ case PGC_BOOL:
+ {
+ struct config_bool *conf = (struct config_bool *) record;
+ bool newval;
- record = find_option(name, elevel);
- if (record == NULL)
- {
- ereport(elevel,
- (errcode(ERRCODE_UNDEFINED_OBJECT),
- errmsg("unrecognized configuration parameter \"%s\"", name)));
- return false;
+ if (value)
+ {
+ if (!parse_bool(value, &newval))
+ {
+ ereport(elevel,
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("parameter \"%s\" requires a Boolean value",
+ record->name)));
+ return false;
+ }
+ }
+ else
+ {
+ newval = conf->reset_val;
+ *source = conf->gen.reset_source;
+ }
+
+ if (conf->assign_hook)
+ if (!(*conf->assign_hook) (newval, changeVal, *source))
+ {
+ ereport(elevel,
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("invalid value for parameter \"%s\": %d",
+ record->name, (int) newval)));
+ return false;
+ }
+ if (retval)
+ retval->boolval = newval;
+ break;
+ }
+
+ case PGC_INT:
+ {
+ struct config_int *conf = (struct config_int *) record;
+ int newval;
+
+ if (value)
+ {
+ if (!parse_int(value, &newval, conf->gen.flags))
+ {
+ ereport(elevel,
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("parameter \"%s\" requires an integer value",
+ record->name)));
+ return false;
+ }
+ if (newval < conf->min || newval > conf->max)
+ {
+ ereport(elevel,
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("%d is outside the valid range for parameter \"%s\" (%d .. %d)",
+ newval, record->name, conf->min, conf->max)));
+ return false;
+ }
+ }
+ else
+ {
+ newval = conf->reset_val;
+ *source = conf->gen.reset_source;
+ }
+
+ if (conf->assign_hook)
+ if (!(*conf->assign_hook) (newval, changeVal, *source))
+ {
+ ereport(elevel,
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("invalid value for parameter \"%s\": %d",
+ record->name, newval)));
+ return false;
+ }
+ if (retval)
+ retval->intval = newval;
+ break;
+ }
+
+ case PGC_REAL:
+ {
+ struct config_real *conf = (struct config_real *) record;
+ double newval;
+
+ if (value)
+ {
+ if (!parse_real(value, &newval))
+ {
+ ereport(elevel,
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("parameter \"%s\" requires a numeric value",
+ record->name)));
+ return false;
+ }
+ if (newval < conf->min || newval > conf->max)
+ {
+ ereport(elevel,
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("%g is outside the valid range for parameter \"%s\" (%g .. %g)",
+ newval, record->name, conf->min, conf->max)));
+ return false;
+ }
+ }
+ else
+ {
+ newval = conf->reset_val;
+ *source = conf->gen.reset_source;
+ }
+
+ if (conf->assign_hook)
+ if (!(*conf->assign_hook) (newval, changeVal, *source))
+ {
+ ereport(elevel,
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("invalid value for parameter \"%s\": %g",
+ record->name, newval)));
+ return false;
+ }
+ if (retval)
+ retval->realval = newval;
+ break;
+ }
+
+ case PGC_STRING:
+ {
+ struct config_string *conf = (struct config_string *) record;
+ char *newval;
+
+ if (value)
+ {
+ if ((newval = guc_strdup(elevel, value)) == NULL)
+ return false;
+ /*
+ * The only sort of "parsing" check we need to do is
+ * apply truncation if GUC_IS_NAME.
+ */
+ if (conf->gen.flags & GUC_IS_NAME)
+ truncate_identifier(newval, strlen(newval), true);
+ }
+ else if (conf->reset_val)
+ {
+ /*
+ * We could possibly avoid strdup here, but easier to make
+ * this case work the same as the normal assignment case.
+ */
+ if ((newval = guc_strdup(elevel, conf->reset_val)) == NULL)
+ return false;
+ *source = conf->gen.reset_source;
+ }
+ else
+ {
+ /* Nothing to reset to, as yet; so do nothing */
+ break;
+ }
+
+ if (conf->assign_hook)
+ {
+ const char *hookresult;
+
+ /*
+ * If the hook ereports, we have to make sure we free
+ * newval, else it will be a permanent memory leak.
+ */
+ hookresult = call_string_assign_hook(conf->assign_hook,
+ newval,
+ changeVal,
+ *source);
+ if (hookresult == NULL)
+ {
+ free(newval);
+ ereport(elevel,
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("invalid value for parameter \"%s\": \"%s\"",
+ record->name, value ? value : "")));
+ return false;
+ }
+ else if (hookresult != newval)
+ {
+ free(newval);
+
+ /*
+ * Having to cast away const here is annoying, but the
+ * alternative is to declare assign_hooks as returning
+ * char*, which would mean they'd have to cast away
+ * const, or as both taking and returning char*, which
+ * doesn't seem attractive either --- we don't want
+ * them to scribble on the passed str.
+ */
+ newval = (char *) hookresult;
+ }
+ }
+
+ if (retval)
+ retval->stringval = newval;
+ else
+ free(newval);
+ break;
+ }
}
+ return true;
+}
- /*
- * Check if the option can be set at this time. See guc.h for the precise
- * rules. Note that we don't want to throw errors if we're in the SIGHUP
- * context. In that case we just ignore the attempt and return true.
- */
+/*
+ * Check if the option can be set at this time. See guc.h for the precise
+ * rules.
+ */
+static bool
+checkContext(int elevel, struct config_generic *record, GucContext context)
+{
switch (record->context)
{
case PGC_INTERNAL:
- if (context == PGC_SIGHUP)
- return true;
if (context != PGC_INTERNAL)
{
ereport(elevel,
(errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
errmsg("parameter \"%s\" cannot be changed",
- name)));
+ record->name)));
return false;
}
break;
case PGC_POSTMASTER:
if (context == PGC_SIGHUP)
- {
- if (changeVal && !is_newvalue_equal(record, value))
- ereport(elevel,
- (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
- errmsg("parameter \"%s\" cannot be changed after server start; configuration file change ignored",
- name)));
+ return false;
- return true;
- }
if (context != PGC_POSTMASTER)
{
ereport(elevel,
(errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
errmsg("parameter \"%s\" cannot be changed after server start",
- name)));
+ record->name)));
return false;
}
break;
ereport(elevel,
(errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
errmsg("parameter \"%s\" cannot be changed now",
- name)));
+ record->name)));
return false;
}
* backend start.
*/
if (IsUnderPostmaster)
- return true;
+ {
+ return false;
+ }
}
else if (context != PGC_BACKEND && context != PGC_POSTMASTER)
{
ereport(elevel,
(errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
errmsg("parameter \"%s\" cannot be set after connection start",
- name)));
+ record->name)));
return false;
}
break;
ereport(elevel,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("permission denied to set parameter \"%s\"",
- name)));
+ record->name)));
return false;
}
break;
/* always okay */
break;
}
+ return true;
+}
+
+/*
+ * Get error level for different sources and context.
+ */
+static int
+get_elevel(GucContext context, GucSource source)
+{
+ int elevel;
+ if (context == PGC_SIGHUP || source == PGC_S_DEFAULT)
+ {
+ /*
+ * To avoid cluttering the log, only the postmaster bleats loudly
+ * about problems with the config file.
+ */
+ elevel = IsUnderPostmaster ? DEBUG2 : LOG;
+ }
+ else if (source == PGC_S_DATABASE || source == PGC_S_USER)
+ elevel = INFO;
+ else
+ elevel = ERROR;
+
+ return elevel;
+}
+
+/*
+ * Verify if option exists and value is valid.
+ * It is primary used for validation of items in configuration file.
+ */
+bool
+verify_config_option(const char *name, const char *value,
+ GucContext context, GucSource source,
+ bool *isNewEqual, bool *isContextOK)
+{
+ int elevel;
+ struct config_generic *record;
+
+ elevel = get_elevel(context, source);
+
+ record = find_option(name, elevel);
+ if (record == NULL)
+ {
+ ereport(elevel,
+ (errcode(ERRCODE_UNDEFINED_OBJECT),
+ errmsg("unrecognized configuration parameter \"%s\"", name)));
+ return false;
+ }
+
+ if (parse_value(elevel, record, value, &source, false, NULL))
+ {
+ if (isNewEqual != NULL)
+ *isNewEqual = is_newvalue_equal(record, value);
+ if (isContextOK != NULL)
+ *isContextOK = checkContext(elevel, record, context);
+ }
+ else
+ return false;
+
+ return true;
+}
+
+
+/*
+ * Sets option `name' to given value. The value should be a string
+ * which is going to be parsed and converted to the appropriate data
+ * type. The context and source parameters indicate in which context this
+ * function is being called so it can apply the access restrictions
+ * properly.
+ *
+ * If value is NULL, set the option to its default value. If the
+ * parameter changeVal is false then don't really set the option but do all
+ * the checks to see if it would work.
+ *
+ * If there is an error (non-existing option, invalid value) then an
+ * ereport(ERROR) is thrown *unless* this is called in a context where we
+ * don't want to ereport (currently, startup or SIGHUP config file reread).
+ * In that case we write a suitable error message via ereport(DEBUG) and
+ * return false. This is working around the deficiencies in the ereport
+ * mechanism, so don't blame me. In all other cases, the function
+ * returns true, including cases where the input is valid but we chose
+ * not to apply it because of context or source-priority considerations.
+ *
+ * See also SetConfigOption for an external interface.
+ */
+bool
+set_config_option(const char *name, const char *value,
+ GucContext context, GucSource source,
+ bool isLocal, bool changeVal)
+{
+ struct config_generic *record;
+ int elevel;
+ bool makeDefault;
+
+ elevel = get_elevel(context, source);
+
+ record = find_option(name, elevel);
+ if (record == NULL)
+ {
+ ereport(elevel,
+ (errcode(ERRCODE_UNDEFINED_OBJECT),
+ errmsg("unrecognized configuration parameter \"%s\"", name)));
+ return false;
+ }
+
+ /* Check if change is allowed in the running context. */
+ if (!checkContext(elevel, record, context))
+ return false;
/*
* Should we set reset/stacked values? (If so, the behavior is not
{
struct config_bool *conf = (struct config_bool *) record;
bool newval;
-
- if (value)
- {
- if (!parse_bool(value, &newval))
- {
- ereport(elevel,
- (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
- errmsg("parameter \"%s\" requires a Boolean value",
- name)));
- return false;
- }
- }
- else
- {
- newval = conf->reset_val;
- source = conf->gen.reset_source;
- }
-
- if (conf->assign_hook)
- if (!(*conf->assign_hook) (newval, changeVal, source))
- {
- ereport(elevel,
- (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
- errmsg("invalid value for parameter \"%s\": %d",
- name, (int) newval)));
- return false;
- }
+
+ if (!parse_value(elevel, record, value, &source, changeVal,
+ (union config_var_value*) &newval))
+ return false;
if (changeVal || makeDefault)
{
/* Save old value to support transaction abort */
if (!makeDefault)
push_old_value(&conf->gen);
+
if (changeVal)
{
*conf->variable = newval;
conf->gen.source = source;
}
+
if (makeDefault)
{
GucStack *stack;
struct config_int *conf = (struct config_int *) record;
int newval;
- if (value)
- {
- if (!parse_int(value, &newval, conf->gen.flags))
- {
- ereport(elevel,
- (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
- errmsg("parameter \"%s\" requires an integer value",
- name)));
- return false;
- }
- if (newval < conf->min || newval > conf->max)
- {
- ereport(elevel,
- (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
- errmsg("%d is outside the valid range for parameter \"%s\" (%d .. %d)",
- newval, name, conf->min, conf->max)));
- return false;
- }
- }
- else
- {
- newval = conf->reset_val;
- source = conf->gen.reset_source;
- }
-
- if (conf->assign_hook)
- if (!(*conf->assign_hook) (newval, changeVal, source))
- {
- ereport(elevel,
- (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
- errmsg("invalid value for parameter \"%s\": %d",
- name, newval)));
- return false;
- }
+ if (!parse_value(elevel, record, value, &source, changeVal,
+ (union config_var_value*) &newval))
+ return false;
if (changeVal || makeDefault)
{
/* Save old value to support transaction abort */
if (!makeDefault)
push_old_value(&conf->gen);
+
if (changeVal)
{
*conf->variable = newval;
conf->gen.source = source;
}
+
if (makeDefault)
{
GucStack *stack;
struct config_real *conf = (struct config_real *) record;
double newval;
- if (value)
- {
- if (!parse_real(value, &newval))
- {
- ereport(elevel,
- (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
- errmsg("parameter \"%s\" requires a numeric value",
- name)));
- return false;
- }
- if (newval < conf->min || newval > conf->max)
- {
- ereport(elevel,
- (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
- errmsg("%g is outside the valid range for parameter \"%s\" (%g .. %g)",
- newval, name, conf->min, conf->max)));
- return false;
- }
- }
- else
- {
- newval = conf->reset_val;
- source = conf->gen.reset_source;
- }
-
- if (conf->assign_hook)
- if (!(*conf->assign_hook) (newval, changeVal, source))
- {
- ereport(elevel,
- (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
- errmsg("invalid value for parameter \"%s\": %g",
- name, newval)));
- return false;
- }
+ if (!parse_value(elevel, record, value, &source, changeVal,
+ (union config_var_value*) &newval))
+ return false;
if (changeVal || makeDefault)
{
/* Save old value to support transaction abort */
if (!makeDefault)
push_old_value(&conf->gen);
+
if (changeVal)
{
*conf->variable = newval;
conf->gen.source = source;
}
+
if (makeDefault)
{
GucStack *stack;
struct config_string *conf = (struct config_string *) record;
char *newval;
- if (value)
- {
- newval = guc_strdup(elevel, value);
- if (newval == NULL)
- return false;
- /*
- * The only sort of "parsing" check we need to do is
- * apply truncation if GUC_IS_NAME.
- */
- if (conf->gen.flags & GUC_IS_NAME)
- truncate_identifier(newval, strlen(newval), true);
- }
- else if (conf->reset_val)
- {
- /*
- * We could possibly avoid strdup here, but easier to make
- * this case work the same as the normal assignment case.
- */
- newval = guc_strdup(elevel, conf->reset_val);
- if (newval == NULL)
- return false;
- source = conf->gen.reset_source;
- }
- else
- {
- /* Nothing to reset to, as yet; so do nothing */
- break;
- }
-
- if (conf->assign_hook)
- {
- const char *hookresult;
-
- /*
- * If the hook ereports, we have to make sure we free
- * newval, else it will be a permanent memory leak.
- */
- hookresult = call_string_assign_hook(conf->assign_hook,
- newval,
- changeVal,
- source);
- if (hookresult == NULL)
- {
- free(newval);
- ereport(elevel,
- (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
- errmsg("invalid value for parameter \"%s\": \"%s\"",
- name, value ? value : "")));
- return false;
- }
- else if (hookresult != newval)
- {
- free(newval);
-
- /*
- * Having to cast away const here is annoying, but the
- * alternative is to declare assign_hooks as returning
- * char*, which would mean they'd have to cast away
- * const, or as both taking and returning char*, which
- * doesn't seem attractive either --- we don't want
- * them to scribble on the passed str.
- */
- newval = (char *) hookresult;
- }
- }
+ if (!parse_value(elevel, record, value, &source, changeVal,
+ (union config_var_value*) &newval))
+ return false;
if (changeVal || makeDefault)
{
/* Save old value to support transaction abort */
if (!makeDefault)
push_old_value(&conf->gen);
+
if (changeVal)
{
set_string_field(conf, conf->variable, newval);
conf->gen.source = source;
}
+
if (makeDefault)
{
GucStack *stack;
/* need a tuple descriptor representing a single TEXT column */
tupdesc = CreateTemplateTupleDesc(1, false);
- TupleDescInitEntry(tupdesc, (AttrNumber) 1, varname,
- TEXTOID, -1, 0);
+ TupleDescInitEntry(tupdesc, (AttrNumber) 1, varname, TEXTOID, -1, 0);
}
return tupdesc;
}
/* send it to dest */
do_tup_output(tstate, values);
- /* clean up */
if (values[1] != NULL)
pfree(values[1]);
}
static bool
is_newvalue_equal(struct config_generic *record, const char *newvalue)
{
+ if (!newvalue)
+ return false;
+
switch (record->vartype)
{
case PGC_BOOL:
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